* src/autofit/afhints.c, src/autofit/afhints.h, src/autofit/aflatin.c,

        src/autofit/afloader.c, src/types.h: grave bugs were fixed. The
        auto-fitter works, doesn't crashes, but still produces unexpected
        results !!

5 files changed, 3727 insertions, 3656 deletions

diff --git a/src/autofit/afhints.c b/src/autofit/afhints.c
index 4cc55ebef..a415fdf60 100644
--- a/src/autofit/afhints.c
+++ b/src/autofit/afhints.c
@@ -1,934 +1,986 @@
-#include "afhints.h"
-
-#ifdef AF_DEBUG
-
-#include <stdio.h>
-
-  void
-  af_glyph_hints_dump_edges( AF_GlyphHints  hints )
-  {
-    AF_Edge     edges;
-    AF_Edge     edge_limit;
-    AF_Segment  segments;
-    FT_Int      dimension;
-
-
-    edges      = hints->horz_edges;
-    edge_limit = edges + hints->num_hedges;
-    segments   = hints->horz_segments;
-
-    for ( dimension = 1; dimension >= 0; dimension-- )
-    {
-      AF_Edge   edge;
-
-
-      printf ( "Table of %s edges:\n",
-               !dimension ? "vertical" : "horizontal" );
-      printf ( "  [ index |  pos |  dir  | link |"
-               " serif | blue | opos  |  pos  ]\n" );
-
-      for ( edge = edges; edge < edge_limit; edge++ )
-      {
-        printf ( "  [ %5d | %4d | %5s | %4d | %5d |  %c  | %5.2f | %5.2f ]\n",
-                 edge - edges,
-                 (int)edge->fpos,
-                 edge->dir == AF_DIR_UP
-                   ? "up"
-                   : ( edge->dir == AF_DIR_DOWN
-                         ? "down"
-                         : ( edge->dir == AF_DIR_LEFT
-                               ? "left"
-                               : ( edge->dir == AF_DIR_RIGHT
-                                     ? "right"
-                                     : "none" ) ) ),
-                 edge->link ? ( edge->link - edges ) : -1,
-                 edge->serif ? ( edge->serif - edges ) : -1,
-                 edge->blue_edge ? 'y' : 'n',
-                 edge->opos / 64.0,
-                 edge->pos / 64.0 );
-      }
-
-      edges      = hints->vert_edges;
-      edge_limit = edges + hints->num_vedges;
-      segments   = hints->vert_segments;
-    }
-  }
-
-
-  /* A function used to dump the array of linked segments */
-  void
-  af_glyph_hints_dump_segments( AF_GlyphHints  hints )
-  {
-    AF_Segment  segments;
-    AF_Segment  segment_limit;
-    AF_Point    points;
-    FT_Int      dimension;
-
-
-    points        = hints->points;
-    segments      = hints->horz_segments;
-    segment_limit = segments + hints->num_hsegments;
-
-    for ( dimension = 1; dimension >= 0; dimension-- )
-    {
-      AF_Segment  seg;
-
-
-      printf ( "Table of %s segments:\n",
-               !dimension ? "vertical" : "horizontal" );
-      printf ( "  [ index |  pos |  dir  | link | serif |"
-               " numl | first | start ]\n" );
-
-      for ( seg = segments; seg < segment_limit; seg++ )
-      {
-        printf ( "  [ %5d | %4d | %5s | %4d | %5d | %4d | %5d | %5d ]\n",
-                 seg - segments,
-                 (int)seg->pos,
-                 seg->dir == AF_DIR_UP
-                   ? "up"
-                   : ( seg->dir == AF_DIR_DOWN
-                         ? "down"
-                         : ( seg->dir == AF_DIR_LEFT
-                               ? "left"
-                               : ( seg->dir == AF_DIR_RIGHT
-                                     ? "right"
-                                     : "none" ) ) ),
-                 seg->link ? ( seg->link - segments ) : -1,
-                 seg->serif ? ( seg->serif - segments ) : -1,
-                 (int)seg->num_linked,
-                 seg->first - points,
-                 seg->last - points );
-      }
-
-      segments      = hints->vert_segments;
-      segment_limit = segments + hints->num_vsegments;
-    }
-  }
-
-#endif /* AF_DEBUG */
-
-
-  /* compute the direction value of a given vector */
-  FT_LOCAL_DEF( AF_Direction )
-  af_direction_compute( FT_Pos  dx,
-                        FT_Pos  dy )
-  {
-    AF_Direction  dir;
-    FT_Pos        ax = ABS( dx );
-    FT_Pos        ay = ABS( dy );
-
-
-    dir = AF_DIR_NONE;
-
-    /* atan(1/12) == 4.7 degrees */
-
-    /* test for vertical direction */
-    if ( ax * 12 < ay )
-    {
-      dir = dy > 0 ? AF_DIR_UP : AF_DIR_DOWN;
-    }
-    /* test for horizontal direction */
-    else if ( ay * 12 < ax )
-    {
-      dir = dx > 0 ? AF_DIR_RIGHT : AF_DIR_LEFT;
-    }
-
-    return dir;
-  }
-
-
-  /* compute all inflex points in a given glyph */
-  static void
-  af_glyph_hints_compute_inflections( AF_GlyphHints  hints )
-  {
-    AF_Point*  contour       = hints->contours;
-    AF_Point*  contour_limit = contour + hints->num_contours;
-
-
-    /* do each contour separately */
-    for ( ; contour < contour_limit; contour++ )
-    {
-      AF_Point   point = contour[0];
-      AF_Point   first = point;
-      AF_Point   start = point;
-      AF_Point   end   = point;
-      AF_Point   before;
-      AF_Point   after;
-      AF_Angle   angle_in, angle_seg, angle_out;
-      AF_Angle   diff_in, diff_out;
-      FT_Int     finished = 0;
-
-
-      /* compute first segment in contour */
-      first = point;
-
-      start = end = first;
-      do
-      {
-        end = end->next;
-        if ( end == first )
-          goto Skip;
-
-      } while ( end->fx == first->fx && end->fy == first->fy );
-
-      angle_seg = af_angle_atan( end->fx - start->fx,
-                                 end->fy - start->fy );
-
-      /* extend the segment start whenever possible */
-      before = start;
-      do
-      {
-        do
-        {
-          start  = before;
-          before = before->prev;
-          if ( before == first )
-            goto Skip;
-
-        } while ( before->fx == start->fx && before->fy == start->fy );
-
-        angle_in = af_angle_atan( start->fx - before->fx,
-                                  start->fy - before->fy );
-
-      } while ( angle_in == angle_seg );
-
-      first   = start;
-      diff_in = af_angle_diff( angle_in, angle_seg );
-
-      /* now, process all segments in the contour */
-      do
-      {
-        /* first, extend current segment's end whenever possible */
-        after = end;
-        do
-        {
-          do
-          {
-            end   = after;
-            after = after->next;
-            if ( after == first )
-              finished = 1;
-
-          } while ( end->fx == after->fx && end->fy == after->fy );
-
-          angle_out = af_angle_atan( after->fx - end->fx,
-                                     after->fy - end->fy );
-
-        } while ( angle_out == angle_seg );
-
-        diff_out = af_angle_diff( angle_seg, angle_out );
-
-        if ( ( diff_in ^ diff_out ) < 0 )
-        {
-          /* diff_in and diff_out have different signs, we have */
-          /* inflection points here...                          */
-          do
-          {
-            start->flags |= AF_FLAG_INFLECTION;
-            start = start->next;
-
-          } while ( start != end );
-
-          start->flags |= AF_FLAG_INFLECTION;
-        }
-
-        start     = end;
-        end       = after;
-        angle_seg = angle_out;
-        diff_in   = diff_out;
-
-      } while ( !finished );
-
-    Skip:
-      ;
-    }
-  }
-
-
-
-  FT_LOCAL_DEF( void )
-  af_glyph_hints_init( AF_GlyphHints  hints,
-                       FT_Memory      memory )
-  {
-    FT_ZERO( hints );
-    hints->memory = memory;
-  }
-
-
-
-  FT_LOCAL_DEF( void )
-  af_glyph_hints_done( AF_GlyphHints  hints )
-  {
-    if ( hints && hints->memory )
-    {
-      FT_Memory     memory = hints->memory;
-      AF_Dimension  dim;
-
-     /* note that we don't need to free the segment and edge
-      * buffers, since they're really within the hints->points array
-      */
-      for ( dim = 0; dim < 2; dim++ )
-      {
-        AF_AxisHints  axis = &hints->axis[ dim ];
-
-        axis->num_segments = 0;
-        axis->num_edges    = 0;
-        axis->segments     = NULL;
-        axis->edges        = NULL;
-      }
-
-      FT_FREE( hints->contours );
-      hints->max_contours = 0;
-      hints->num_contours = 0;
-
-      FT_FREE( hints->points );
-      hints->num_points = 0;
-      hints->max_points = 0;
-
-      hints->memory = NULL;
-    }
-  }
-
-
-
-  FT_LOCAL_DEF( FT_Error )
-  af_glyph_hints_reset( AF_GlyphHints  hints,
-                        AF_Scaler      scaler,
-                        FT_Outline*    outline )
-  {
-    FT_Error     error        = FT_Err_Ok;
-    AF_Point     points;
-    FT_UInt      old_max, new_max;
-    FT_Fixed     x_scale = scaler->x_scale;
-    FT_Fixed     y_scale = scaler->y_scale;
-    FT_Pos       x_delta = scaler->x_delta;
-    FT_Pos       y_delta = scaler->y_delta;
-    FT_Memory    memory  = hints->memory;
-
-    hints->scaler_flags = scaler->flags;
-    hints->other_flags  = 0;
-
-    hints->num_points    = 0;
-    hints->num_contours  = 0;
-
-    hints->axis[0].num_segments = 0;
-    hints->axis[0].num_edges    = 0;
-    hints->axis[1].num_segments = 0;
-    hints->axis[1].num_edges    = 0;
-
-   /* first of all, reallocate the contours array when necessary
-    */
-    new_max = (FT_UInt) outline->n_contours;
-    old_max = hints->max_contours;
-    if ( new_max > old_max )
-    {
-      new_max = (new_max + 3) & ~3;
-
-      if ( FT_RENEW_ARRAY( hints->contours, old_max, new_max ) )
-        goto Exit;
-
-      hints->max_contours = new_max;
-    }
-
-   /* then, reallocate the points, segments & edges arrays if needed --
-    * note that we reserved two additional point positions, used to
-    * hint metrics appropriately
-    */
-    new_max = (FT_UInt)( outline->n_points + 2 );
-    old_max = hints->max_points;
-    if ( new_max > old_max )
-    {
-      FT_Byte*    items;
-      FT_ULong    off1, off2, off3;
-
-     /* we store in a single buffer the following arrays:
-      *
-      *  - an array of   N  AF_PointRec   items
-      *  - an array of 2*N  AF_SegmentRec items
-      *  - an array of 2*N  AF_EdgeRec    items
-      *
-      */
-
-      new_max = ( new_max + 2 + 7 ) & ~7;
-
-#undef  OFF_INCREMENT
-#define OFF_INCREMENT( _off, _type, _count )   \
-     ( FT_PAD_CEIL( _off, sizeof(_type) ) + (_count)*sizeof(_type))
-
-      off1 = OFF_INCREMENT( 0, AF_PointRec, new_max );
-      off2 = OFF_INCREMENT( off1, AF_SegmentRec, new_max );
-      off3 = OFF_INCREMENT( off2, AF_EdgeRec, new_max*2 );
-
-      FT_FREE( hints->points );
-
-      if ( FT_ALLOC( items, off3 ) )
-      {
-        hints->max_points       = 0;
-        hints->axis[0].segments = NULL;
-        hints->axis[0].edges    = NULL;
-        hints->axis[1].segments = NULL;
-        hints->axis[1].edges    = NULL;
-        goto Exit;
-      }
-
-     /* readjust some pointers
-      */
-      hints->max_points       = new_max;
-      hints->points           = (AF_Point) items;
-
-      hints->axis[0].segments = (AF_Segment)( items + off1 );
-      hints->axis[1].segments = hints->axis[0].segments + new_max;
-
-      hints->axis[0].edges    = (AF_Edge)   ( items + off2 );
-      hints->axis[1].edges    = hints->axis[0].edges + new_max;
-    }
-
-    hints->num_points   = outline->n_points;
-    hints->num_contours = outline->n_contours;
-
-
-    /* We can't rely on the value of `FT_Outline.flags' to know the fill  */
-    /* direction used for a glyph, given that some fonts are broken (e.g. */
-    /* the Arphic ones).  We thus recompute it each time we need to.      */
-    /*                                                                    */
-    hints->axis[ AF_DIMENSION_HORZ ].major_dir = AF_DIR_UP;
-    hints->axis[ AF_DIMENSION_VERT ].major_dir = AF_DIR_LEFT;
-
-    if ( FT_Outline_Get_Orientation( outline ) == FT_ORIENTATION_POSTSCRIPT )
-    {
-      hints->axis[ AF_DIMENSION_HORZ ].major_dir = AF_DIR_DOWN;
-      hints->axis[ AF_DIMENSION_VERT ].major_dir = AF_DIR_RIGHT;
-    }
-
-    hints->x_scale = x_scale;
-    hints->y_scale = y_scale;
-    hints->x_delta = x_delta;
-    hints->y_delta = y_delta;
-
-    points = hints->points;
-    if ( hints->num_points == 0 )
-      goto Exit;
-
-    {
-      AF_Point  point;
-      AF_Point  point_limit = points + hints->num_points;
-
-
-      /* compute coordinates & bezier flags */
-      {
-        FT_Vector*  vec = outline->points;
-        char*       tag = outline->tags;
-
-
-        for ( point = points; point < point_limit; point++, vec++, tag++ )
-        {
-          point->fx = vec->x;
-          point->fy = vec->y;
-          point->ox = point->x = FT_MulFix( vec->x, x_scale ) + x_delta;
-          point->oy = point->y = FT_MulFix( vec->y, y_scale ) + y_delta;
-
-          switch ( FT_CURVE_TAG( *tag ) )
-          {
-          case FT_CURVE_TAG_CONIC:
-            point->flags = AF_FLAG_CONIC;
-            break;
-          case FT_CURVE_TAG_CUBIC:
-            point->flags = AF_FLAG_CUBIC;
-            break;
-          default:
-            point->flags = 0;
-            ;
-          }
-        }
-      }
-
-      /* compute `next' and `prev' */
-      {
-        FT_Int    contour_index;
-        AF_Point  prev;
-        AF_Point  first;
-        AF_Point  end;
-
-
-        contour_index = 0;
-
-        first = points;
-        end   = points + outline->contours[0];
-        prev  = end;
-
-        for ( point = points; point < point_limit; point++ )
-        {
-          point->prev = prev;
-          if ( point < end )
-          {
-            point->next = point + 1;
-            prev        = point;
-          }
-          else
-          {
-            point->next = first;
-            contour_index++;
-            if ( point + 1 < point_limit )
-            {
-              end   = points + outline->contours[contour_index];
-              first = point + 1;
-              prev  = end;
-            }
-          }
-        }
-      }
-
-      /* set-up the contours array */
-      {
-        AF_Point*  contour       = hints->contours;
-        AF_Point*  contour_limit = contour + hints->num_contours;
-        short*     end           = outline->contours;
-        short      idx           = 0;
-
-
-        for ( ; contour < contour_limit; contour++, end++ )
-        {
-          contour[0] = points + idx;
-          idx        = (short)( end[0] + 1 );
-        }
-      }
-
-      /* compute directions of in & out vectors */
-      {
-        for ( point = points; point < point_limit; point++ )
-        {
-          AF_Point   prev;
-          AF_Point   next;
-          FT_Pos     in_x, in_y, out_x, out_y;
-
-
-          prev   = point->prev;
-          in_x   = point->fx - prev->fx;
-          in_y   = point->fy - prev->fy;
-
-          point->in_dir = af_direction_compute( in_x, in_y );
-
-          next   = point->next;
-          out_x  = next->fx - point->fx;
-          out_y  = next->fy - point->fy;
-
-          point->out_dir = af_direction_compute( out_x, out_y );
-
-          if ( point->flags & ( AF_FLAG_CONIC | AF_FLAG_CUBIC ) )
-          {
-          Is_Weak_Point:
-            point->flags |= AF_FLAG_WEAK_INTERPOLATION;
-          }
-          else if ( point->out_dir == point->in_dir )
-          {
-            AF_Angle  angle_in, angle_out, delta;
-
-
-            if ( point->out_dir != AF_DIR_NONE )
-              goto Is_Weak_Point;
-
-            angle_in  = af_angle_atan( in_x, in_y );
-            angle_out = af_angle_atan( out_x, out_y );
-            delta     = af_angle_diff( angle_in, angle_out );
-
-            if ( delta < 2 && delta > -2 )
-              goto Is_Weak_Point;
-          }
-          else if ( point->in_dir == -point->out_dir )
-            goto Is_Weak_Point;
-        }
-      }
-    }
-
-   /* compute inflection points
-    */
-    af_glyph_hints_compute_inflections( hints );
-
-  Exit:
-    return error;
-  }
-
-
-
-
- /*
-  *
-  *  E D G E   P O I N T   G R I D - F I T T I N G
-  *
-  */
-
-
-  FT_LOCAL_DEF( void )
-  af_glyph_hints_align_edge_points( AF_GlyphHints  hints,
-                                    AF_Dimension   dim )
-  {
-    AF_AxisHints  axis       = & hints->axis[ dim ];
-    AF_Edge       edges      = axis->edges;
-    AF_Edge       edge_limit = edges + axis->num_edges;
-    AF_Edge       edge;
-
-    for ( edge = edges; edge < edge_limit; edge++ )
-    {
-      /* move the points of each segment     */
-      /* in each edge to the edge's position */
-      AF_Segment  seg = edge->first;
-
-
-      do
-      {
-        AF_Point  point = seg->first;
-
-
-        for (;;)
-        {
-          if ( dim == AF_DIMENSION_HORZ )
-          {
-            point->x      = edge->pos;
-            point->flags |= AF_FLAG_TOUCH_X;
-          }
-          else
-          {
-            point->y      = edge->pos;
-            point->flags |= AF_FLAG_TOUCH_Y;
-          }
-
-          if ( point == seg->last )
-            break;
-
-          point = point->next;
-        }
-
-        seg = seg->edge_next;
-
-      } while ( seg != edge->first );
-    }
-  }
-
-
- /*
-  *
-  *  S T R O N G   P O I N T   I N T E R P O L A T I O N
-  *
-  */
-
-
-  /* hint the strong points -- this is equivalent to the TrueType `IP' */
-  /* hinting instruction                                               */
-  FT_LOCAL_DEF( void )
-  af_glyph_hints_align_strong_points( AF_GlyphHints  hints,
-                                      AF_Dimension   dim )
-  {
-    AF_Point      points      = hints->points;
-    AF_Point      point_limit = points + hints->num_points;
-    AF_AxisHints  axis        = &hints->axis[dim];
-    AF_Edge       edges       = axis->edges;
-    AF_Edge       edge_limit  = edges + axis->num_edges;
-    AF_Flags      touch_flag;
-
-
-    if ( dim == AF_DIMENSION_HORZ )
-      touch_flag = AF_FLAG_TOUCH_X;
-    else
-      touch_flag  = AF_FLAG_TOUCH_Y;
-
-    if ( edges < edge_limit )
-    {
-      AF_Point  point;
-      AF_Edge   edge;
-
-      for ( point = points; point < point_limit; point++ )
-      {
-        FT_Pos  u, ou, fu;  /* point position */
-        FT_Pos  delta;
-
-
-        if ( point->flags & touch_flag )
-          continue;
-
-        /* if this point is candidate to weak interpolation, we will  */
-        /* interpolate it after all strong points have been processed */
-        if (  ( point->flags & AF_FLAG_WEAK_INTERPOLATION ) &&
-             !( point->flags & AF_FLAG_INFLECTION )         )
-          continue;
-
-        if ( dim == AF_DIMENSION_VERT )
-        {
-          u  = point->fy;
-          ou = point->oy;
-        }
-        else
-        {
-          u  = point->fx;
-          ou = point->ox;
-        }
-
-        fu = u;
-
-        /* is the point before the first edge? */
-        edge  = edges;
-        delta = edge->fpos - u;
-        if ( delta >= 0 )
-        {
-          u = edge->pos - ( edge->opos - ou );
-          goto Store_Point;
-        }
-
-        /* is the point after the last edge? */
-        edge  = edge_limit - 1;
-        delta = u - edge->fpos;
-        if ( delta >= 0 )
-        {
-          u = edge->pos + ( ou - edge->opos );
-          goto Store_Point;
-        }
-
-        {
-          FT_UInt  min, max, mid;
-          FT_Pos   fpos;
-
-
-          /* find enclosing edges */
-          min = 0;
-          max = edge_limit - edges;
-
-          while ( min < max )
-          {
-            mid  = ( max + min ) >> 1;
-            edge = edges + mid;
-            fpos = edge->fpos;
-
-            if ( u < fpos )
-              max = mid;
-            else if ( u > fpos )
-              min = mid + 1;
-            else
-            {
-              /* we are on the edge */
-              u = edge->pos;
-              goto Store_Point;
-            }
-          }
-
-          {
-            AF_Edge  before = edges + min - 1;
-            AF_Edge  after  = edges + min + 0;
-
-
-            /* assert( before && after && before != after ) */
-            if ( before->scale == 0 )
-              before->scale = FT_DivFix( after->pos - before->pos,
-                                         after->fpos - before->fpos );
-
-            u = before->pos + FT_MulFix( fu - before->fpos,
-                                         before->scale );
-          }
-        }
-
-
-      Store_Point:
-
-        /* save the point position */
-        if ( dim == AF_DIMENSION_HORZ )
-          point->x = u;
-        else
-          point->y = u;
-
-        point->flags |= touch_flag;
-      }
-    }
-  }
-
-
- /*
-  *
-  *  W E A K   P O I N T   I N T E R P O L A T I O N
-  *
-  */
-
-  static void
-  af_iup_shift( AF_Point  p1,
-                AF_Point  p2,
-                AF_Point  ref )
-  {
-    AF_Point  p;
-    FT_Pos    delta = ref->u - ref->v;
-
-
-    for ( p = p1; p < ref; p++ )
-      p->u = p->v + delta;
-
-    for ( p = ref + 1; p <= p2; p++ )
-      p->u = p->v + delta;
-  }
-
-
-  static void
-  af_iup_interp( AF_Point  p1,
-                 AF_Point  p2,
-                 AF_Point  ref1,
-                 AF_Point  ref2 )
-  {
-    AF_Point  p;
-    FT_Pos    u;
-    FT_Pos    v1 = ref1->v;
-    FT_Pos    v2 = ref2->v;
-    FT_Pos    d1 = ref1->u - v1;
-    FT_Pos    d2 = ref2->u - v2;
-
-
-    if ( p1 > p2 )
-      return;
-
-    if ( v1 == v2 )
-    {
-      for ( p = p1; p <= p2; p++ )
-      {
-        u = p->v;
-
-        if ( u <= v1 )
-          u += d1;
-        else
-          u += d2;
-
-        p->u = u;
-      }
-      return;
-    }
-
-    if ( v1 < v2 )
-    {
-      for ( p = p1; p <= p2; p++ )
-      {
-        u = p->v;
-
-        if ( u <= v1 )
-          u += d1;
-        else if ( u >= v2 )
-          u += d2;
-        else
-          u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 );
-
-        p->u = u;
-      }
-    }
-    else
-    {
-      for ( p = p1; p <= p2; p++ )
-      {
-        u = p->v;
-
-        if ( u <= v2 )
-          u += d2;
-        else if ( u >= v1 )
-          u += d1;
-        else
-          u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 );
-
-        p->u = u;
-      }
-    }
-  }
-
-
-  FT_LOCAL_DEF( void )
-  af_glyph_hints_align_weak_points( AF_GlyphHints  hints,
-                                    AF_Dimension   dim )
-  {
-    AF_Point    points        = hints->points;
-    AF_Point    point_limit   = points + hints->num_points;
-    AF_Point*   contour       = hints->contours;
-    AF_Point*   contour_limit = contour + hints->num_contours;
-    AF_Flags    touch_flag;
-    AF_Point    point;
-    AF_Point    end_point;
-    AF_Point    first_point;
-
-
-    /* PASS 1: Move segment points to edge positions */
-
-    if ( dim == AF_DIMENSION_HORZ )
-    {
-      touch_flag = AF_FLAG_TOUCH_X;
-
-      for ( point = points; point < point_limit; point++ )
-      {
-        point->u = point->x;
-        point->v = point->ox;
-      }
-    }
-    else
-    {
-      touch_flag = AF_FLAG_TOUCH_Y;
-
-      for ( point = points; point < point_limit; point++ )
-      {
-        point->u = point->y;
-        point->v = point->oy;
-      }
-    }
-
-    point   = points;
-
-    for ( ; contour < contour_limit; contour++ )
-    {
-      point       = *contour;
-      end_point   = point->prev;
-      first_point = point;
-
-      while ( point <= end_point && !( point->flags & touch_flag ) )
-        point++;
-
-      if ( point <= end_point )
-      {
-        AF_Point  first_touched = point;
-        AF_Point  cur_touched   = point;
-
-
-        point++;
-        while ( point <= end_point )
-        {
-          if ( point->flags & touch_flag )
-          {
-            /* we found two successive touched points; we interpolate */
-            /* all contour points between them                        */
-            af_iup_interp( cur_touched + 1, point - 1,
-                           cur_touched, point );
-            cur_touched = point;
-          }
-          point++;
-        }
-
-        if ( cur_touched == first_touched )
-        {
-          /* this is a special case: only one point was touched in the */
-          /* contour; we thus simply shift the whole contour           */
-          af_iup_shift( first_point, end_point, cur_touched );
-        }
-        else
-        {
-          /* now interpolate after the last touched point to the end */
-          /* of the contour                                          */
-          af_iup_interp( cur_touched + 1, end_point,
-                         cur_touched, first_touched );
-
-          /* if the first contour point isn't touched, interpolate */
-          /* from the contour start to the first touched point     */
-          if ( first_touched > points )
-            af_iup_interp( first_point, first_touched - 1,
-                           cur_touched, first_touched );
-        }
-      }
-    }
-
-    /* now save the interpolated values back to x/y */
-    if ( dim == AF_DIMENSION_HORZ )
-    {
-      for ( point = points; point < point_limit; point++ )
-        point->x = point->u;
-    }
-    else
-    {
-      for ( point = points; point < point_limit; point++ )
-        point->y = point->u;
-    }
-  }
+#include "afhints.h"

+

+#ifdef AF_DEBUG

+

+#include <stdio.h>

+

+  static const char* af_dir_str( AF_Direction  dir )

+  {

+    const char*  result;

+

+    switch (dir)

+    {

+     case AF_DIR_UP: result = "up"; break;

+     case AF_DIR_DOWN: result = "down"; break;

+     case AF_DIR_LEFT: result = "left"; break;

+     case AF_DIR_RIGHT: result = "right"; break;

+     default: result = "none";

+    }

+    return result;

+  }

+

+#define  AF_INDEX_NUM(ptr,base)  ( (ptr) ? ((ptr)-(base)) : -1 )

+

+  void

+  af_glyph_hints_dump_points( AF_GlyphHints  hints )

+  {

+    AF_Point  points = hints->points;

+    AF_Point  limit  = points + hints->num_points;

+    AF_Point  point;

+

+    printf( "Table of points:\n" );

+    printf(   "  [ index |  xorg |  yorg |  xscale |  yscale |  xfit  |  yfit  |  flags ]\n" );

+    for ( point = points; point < limit; point++ )

+    {

+      printf( "  [ %5d | %5d | %5d | %-5.2f | %-5.2f | %-5.2f | %-5.2f | %c%c%c%c%c%c ]\n",

+              point - points,

+              point->fx,

+              point->fy,

+              point->ox/64.0,

+              point->oy/64.0,

+              point->x/64.0,

+              point->y/64.0,

+              (point->flags & AF_FLAG_WEAK_INTERPOLATION) ? 'w' : ' ',

+              (point->flags & AF_FLAG_INFLECTION)         ? 'i' : ' ',

+              (point->flags & AF_FLAG_EXTREMA_X)          ? '<' : ' ',

+              (point->flags & AF_FLAG_EXTREMA_Y)          ? 'v' : ' ',

+              (point->flags & AF_FLAG_ROUND_X)            ? '(' : ' ',

+              (point->flags & AF_FLAG_ROUND_Y)            ? 'u' : ' '

+            );

+    }

+    printf( "\n" );

+  }

+

+

+  /* A function used to dump the array of linked segments */

+  void

+  af_glyph_hints_dump_segments( AF_GlyphHints  hints )

+  {

+    AF_Point    points = hints->points;

+    FT_Int      dimension;

+

+    for ( dimension = 1; dimension >= 0; dimension-- )

+    {

+      AF_AxisHints  axis = &hints->axis[dimension];

+      AF_Segment    segments = axis->segments;

+      AF_Segment    limit    = segments + axis->num_segments;

+      AF_Segment    seg;

+

+

+      printf ( "Table of %s segments:\n",

+               dimension == AF_DIMENSION_HORZ ? "vertical" : "horizontal" );

+      printf ( "  [ index |  pos |  dir  | link | serif |"

+               " numl | first | start ]\n" );

+

+      for ( seg = segments; seg < limit; seg++ )

+      {

+        printf ( "  [ %5d | %4d | %5s | %4d | %5d | %4d | %5d | %5d ]\n",

+                 seg - segments,

+                 (int)seg->pos,

+                 af_dir_str( seg->dir ),

+                 AF_INDEX_NUM( seg->link, segments ),

+                 AF_INDEX_NUM( seg->serif, segments ),

+                 (int)seg->num_linked,

+                 seg->first - points,

+                 seg->last - points );

+      }

+      printf( "\n" );

+    }

+  }

+

+

+  void

+  af_glyph_hints_dump_edges( AF_GlyphHints  hints )

+  {

+    FT_Int      dimension;

+

+    for ( dimension = 1; dimension >= 0; dimension-- )

+    {

+      AF_AxisHints  axis  = &hints->axis[ dimension ];

+      AF_Edge       edges = axis->edges;

+      AF_Edge       limit = edges + axis->num_edges;

+      AF_Edge       edge;

+

+     /* note: AF_DIMENSION_HORZ corresponds to _vertical_ edges

+      * since they have constant X coordinate

+      */

+      printf ( "Table of %s edges:\n",

+               dimension == AF_DIMENSION_HORZ ? "vertical" : "horizontal" );

+      printf ( "  [ index |  pos |  dir  | link |"

+               " serif | blue | opos  |  pos  ]\n" );

+

+      for ( edge = edges; edge < limit; edge++ )

+      {

+        printf ( "  [ %5d | %4d | %5s | %4d | %5d |  %c  | %5.2f | %5.2f ]\n",

+                 edge - edges,

+                 (int)edge->fpos,

+                 af_dir_str( edge->dir ),

+                 AF_INDEX_NUM( edge->link, edges ),

+                 AF_INDEX_NUM( edge->serif, edges ),

+                 edge->blue_edge ? 'y' : 'n',

+                 edge->opos / 64.0,

+                 edge->pos / 64.0 );

+      }

+

+      printf( "\n" );

+    }

+  }

+

+

+

+#endif /* AF_DEBUG */

+

+

+  /* compute the direction value of a given vector */

+  FT_LOCAL_DEF( AF_Direction )

+  af_direction_compute( FT_Pos  dx,

+                        FT_Pos  dy )

+  {

+    AF_Direction  dir;

+    FT_Pos        ax = ABS( dx );

+    FT_Pos        ay = ABS( dy );

+

+

+    dir = AF_DIR_NONE;

+

+    /* atan(1/12) == 4.7 degrees */

+

+    /* test for vertical direction */

+    if ( ax * 12 < ay )

+    {

+      dir = dy > 0 ? AF_DIR_UP : AF_DIR_DOWN;

+    }

+    /* test for horizontal direction */

+    else if ( ay * 12 < ax )

+    {

+      dir = dx > 0 ? AF_DIR_RIGHT : AF_DIR_LEFT;

+    }

+

+    return dir;

+  }

+

+

+  /* compute all inflex points in a given glyph */

+  static void

+  af_glyph_hints_compute_inflections( AF_GlyphHints  hints )

+  {

+    AF_Point*  contour       = hints->contours;

+    AF_Point*  contour_limit = contour + hints->num_contours;

+

+

+    /* do each contour separately */

+    for ( ; contour < contour_limit; contour++ )

+    {

+      AF_Point   point = contour[0];

+      AF_Point   first = point;

+      AF_Point   start = point;

+      AF_Point   end   = point;

+      AF_Point   before;

+      AF_Point   after;

+      AF_Angle   angle_in, angle_seg, angle_out;

+      AF_Angle   diff_in, diff_out;

+      FT_Int     finished = 0;

+

+

+      /* compute first segment in contour */

+      first = point;

+

+      start = end = first;

+      do

+      {

+        end = end->next;

+        if ( end == first )

+          goto Skip;

+

+      } while ( end->fx == first->fx && end->fy == first->fy );

+

+      angle_seg = af_angle_atan( end->fx - start->fx,

+                                 end->fy - start->fy );

+

+      /* extend the segment start whenever possible */

+      before = start;

+      do

+      {

+        do

+        {

+          start  = before;

+          before = before->prev;

+          if ( before == first )

+            goto Skip;

+

+        } while ( before->fx == start->fx && before->fy == start->fy );

+

+        angle_in = af_angle_atan( start->fx - before->fx,

+                                  start->fy - before->fy );

+

+      } while ( angle_in == angle_seg );

+

+      first   = start;

+      diff_in = af_angle_diff( angle_in, angle_seg );

+

+      /* now, process all segments in the contour */

+      do

+      {

+        /* first, extend current segment's end whenever possible */

+        after = end;

+        do

+        {

+          do

+          {

+            end   = after;

+            after = after->next;

+            if ( after == first )

+              finished = 1;

+

+          } while ( end->fx == after->fx && end->fy == after->fy );

+

+          angle_out = af_angle_atan( after->fx - end->fx,

+                                     after->fy - end->fy );

+

+        } while ( angle_out == angle_seg );

+

+        diff_out = af_angle_diff( angle_seg, angle_out );

+

+        if ( ( diff_in ^ diff_out ) < 0 )

+        {

+          /* diff_in and diff_out have different signs, we have */

+          /* inflection points here...                          */

+          do

+          {

+            start->flags |= AF_FLAG_INFLECTION;

+            start = start->next;

+

+          } while ( start != end );

+

+          start->flags |= AF_FLAG_INFLECTION;

+        }

+

+        start     = end;

+        end       = after;

+        angle_seg = angle_out;

+        diff_in   = diff_out;

+

+      } while ( !finished );

+

+    Skip:

+      ;

+    }

+  }

+

+

+

+  FT_LOCAL_DEF( void )

+  af_glyph_hints_init( AF_GlyphHints  hints,

+                       FT_Memory      memory )

+  {

+    FT_ZERO( hints );

+    hints->memory = memory;

+  }

+

+

+

+  FT_LOCAL_DEF( void )

+  af_glyph_hints_done( AF_GlyphHints  hints )

+  {

+    if ( hints && hints->memory )

+    {

+      FT_Memory     memory = hints->memory;

+      AF_Dimension  dim;

+

+     /* note that we don't need to free the segment and edge

+      * buffers, since they're really within the hints->points array

+      */

+      for ( dim = 0; dim < 2; dim++ )

+      {

+        AF_AxisHints  axis = &hints->axis[ dim ];

+

+        axis->num_segments = 0;

+        axis->num_edges    = 0;

+        axis->segments     = NULL;

+        axis->edges        = NULL;

+      }

+

+      FT_FREE( hints->contours );

+      hints->max_contours = 0;

+      hints->num_contours = 0;

+

+      FT_FREE( hints->points );

+      hints->num_points = 0;

+      hints->max_points = 0;

+

+      hints->memory = NULL;

+    }

+  }

+

+

+

+  FT_LOCAL_DEF( FT_Error )

+  af_glyph_hints_reset( AF_GlyphHints     hints,

+                        AF_Scaler         scaler,

+                        AF_ScriptMetrics  metrics,

+                        FT_Outline*       outline )

+  {

+    FT_Error     error        = FT_Err_Ok;

+    AF_Point     points;

+    FT_UInt      old_max, new_max;

+    FT_Fixed     x_scale = scaler->x_scale;

+    FT_Fixed     y_scale = scaler->y_scale;

+    FT_Pos       x_delta = scaler->x_delta;

+    FT_Pos       y_delta = scaler->y_delta;

+    FT_Memory    memory  = hints->memory;

+

+    hints->metrics = metrics;

+

+    hints->scaler_flags = scaler->flags;

+    hints->other_flags  = 0;

+

+    hints->num_points    = 0;

+    hints->num_contours  = 0;

+

+    hints->axis[0].num_segments = 0;

+    hints->axis[0].num_edges    = 0;

+    hints->axis[1].num_segments = 0;

+    hints->axis[1].num_edges    = 0;

+

+   /* first of all, reallocate the contours array when necessary

+    */

+    new_max = (FT_UInt) outline->n_contours;

+    old_max = hints->max_contours;

+    if ( new_max > old_max )

+    {

+      new_max = (new_max + 3) & ~3;

+

+      if ( FT_RENEW_ARRAY( hints->contours, old_max, new_max ) )

+        goto Exit;

+

+      hints->max_contours = new_max;

+    }

+

+   /* then, reallocate the points, segments & edges arrays if needed --

+    * note that we reserved two additional point positions, used to

+    * hint metrics appropriately

+    */

+    new_max = (FT_UInt)( outline->n_points + 2 );

+    old_max = hints->max_points;

+    if ( new_max > old_max )

+    {

+      FT_Byte*    items;

+      FT_ULong    off1, off2, off3;

+

+     /* we store in a single buffer the following arrays:

+      *

+      *  - an array of   N  AF_PointRec   items

+      *  - an array of 2*N  AF_SegmentRec items

+      *  - an array of 2*N  AF_EdgeRec    items

+      *

+      */

+

+      new_max = ( new_max + 2 + 7 ) & ~7;

+

+#define OFF_PAD2(x,y)   (((x)+(y)-1) & ~((y)-1))

+#define OFF_PADX(x,y)   ((((x)+(y)-1)/(y))*(y))

+#define OFF_PAD(x,y)    ( ((y) & ((y)-1)) ? OFF_PADX(x,y) : OFF_PAD2(x,y) )

+

+#undef  OFF_INCREMENT

+#define OFF_INCREMENT( _off, _type, _count )   \

+     ( OFF_PAD( _off, sizeof(_type) ) + (_count)*sizeof(_type))

+

+      off1 = OFF_INCREMENT( 0, AF_PointRec, new_max );

+      off2 = OFF_INCREMENT( off1, AF_SegmentRec, new_max*2 );

+      off3 = OFF_INCREMENT( off2, AF_EdgeRec, new_max*2 );

+

+      FT_FREE( hints->points );

+

+      if ( FT_ALLOC( items, off3 ) )

+      {

+        hints->max_points       = 0;

+        hints->axis[0].segments = NULL;

+        hints->axis[0].edges    = NULL;

+        hints->axis[1].segments = NULL;

+        hints->axis[1].edges    = NULL;

+        goto Exit;

+      }

+

+     /* readjust some pointers

+      */

+      hints->max_points       = new_max;

+      hints->points           = (AF_Point) items;

+

+      hints->axis[0].segments = (AF_Segment)( items + off1 );

+      hints->axis[1].segments = hints->axis[0].segments + new_max;

+

+      hints->axis[0].edges    = (AF_Edge)   ( items + off2 );

+      hints->axis[1].edges    = hints->axis[0].edges + new_max;

+    }

+

+    hints->num_points   = outline->n_points;

+    hints->num_contours = outline->n_contours;

+

+

+    /* We can't rely on the value of `FT_Outline.flags' to know the fill  */

+    /* direction used for a glyph, given that some fonts are broken (e.g. */

+    /* the Arphic ones).  We thus recompute it each time we need to.      */

+    /*                                                                    */

+    hints->axis[ AF_DIMENSION_HORZ ].major_dir = AF_DIR_UP;

+    hints->axis[ AF_DIMENSION_VERT ].major_dir = AF_DIR_LEFT;

+

+    if ( FT_Outline_Get_Orientation( outline ) == FT_ORIENTATION_POSTSCRIPT )

+    {

+      hints->axis[ AF_DIMENSION_HORZ ].major_dir = AF_DIR_DOWN;

+      hints->axis[ AF_DIMENSION_VERT ].major_dir = AF_DIR_RIGHT;

+    }

+

+    hints->x_scale = x_scale;

+    hints->y_scale = y_scale;

+    hints->x_delta = x_delta;

+    hints->y_delta = y_delta;

+

+    points = hints->points;

+    if ( hints->num_points == 0 )

+      goto Exit;

+

+    {

+      AF_Point  point;

+      AF_Point  point_limit = points + hints->num_points;

+

+

+      /* compute coordinates & bezier flags */

+      {

+        FT_Vector*  vec = outline->points;

+        char*       tag = outline->tags;

+

+

+        for ( point = points; point < point_limit; point++, vec++, tag++ )

+        {

+          point->fx = vec->x;

+          point->fy = vec->y;

+          point->ox = point->x = FT_MulFix( vec->x, x_scale ) + x_delta;

+          point->oy = point->y = FT_MulFix( vec->y, y_scale ) + y_delta;

+

+          switch ( FT_CURVE_TAG( *tag ) )

+          {

+          case FT_CURVE_TAG_CONIC:

+            point->flags = AF_FLAG_CONIC;

+            break;

+          case FT_CURVE_TAG_CUBIC:

+            point->flags = AF_FLAG_CUBIC;

+            break;

+          default:

+            point->flags = 0;

+            ;

+          }

+        }

+      }

+

+      /* compute `next' and `prev' */

+      {

+        FT_Int    contour_index;

+        AF_Point  prev;

+        AF_Point  first;

+        AF_Point  end;

+

+

+        contour_index = 0;

+

+        first = points;

+        end   = points + outline->contours[0];

+        prev  = end;

+

+        for ( point = points; point < point_limit; point++ )

+        {

+          point->prev = prev;

+          if ( point < end )

+          {

+            point->next = point + 1;

+            prev        = point;

+          }

+          else

+          {

+            point->next = first;

+            contour_index++;

+            if ( point + 1 < point_limit )

+            {

+              end   = points + outline->contours[contour_index];

+              first = point + 1;

+              prev  = end;

+            }

+          }

+        }

+      }

+

+      /* set-up the contours array */

+      {

+        AF_Point*  contour       = hints->contours;

+        AF_Point*  contour_limit = contour + hints->num_contours;

+        short*     end           = outline->contours;

+        short      idx           = 0;

+

+

+        for ( ; contour < contour_limit; contour++, end++ )

+        {

+          contour[0] = points + idx;

+          idx        = (short)( end[0] + 1 );

+        }

+      }

+

+      /* compute directions of in & out vectors */

+      {

+        for ( point = points; point < point_limit; point++ )

+        {

+          AF_Point   prev;

+          AF_Point   next;

+          FT_Pos     in_x, in_y, out_x, out_y;

+

+

+          prev   = point->prev;

+          in_x   = point->fx - prev->fx;

+          in_y   = point->fy - prev->fy;

+

+          point->in_dir = af_direction_compute( in_x, in_y );

+

+          next   = point->next;

+          out_x  = next->fx - point->fx;

+          out_y  = next->fy - point->fy;

+

+          point->out_dir = af_direction_compute( out_x, out_y );

+

+          if ( point->flags & ( AF_FLAG_CONIC | AF_FLAG_CUBIC ) )

+          {

+          Is_Weak_Point:

+            point->flags |= AF_FLAG_WEAK_INTERPOLATION;

+          }

+          else if ( point->out_dir == point->in_dir )

+          {

+            AF_Angle  angle_in, angle_out, delta;

+

+

+            if ( point->out_dir != AF_DIR_NONE )

+              goto Is_Weak_Point;

+

+            angle_in  = af_angle_atan( in_x, in_y );

+            angle_out = af_angle_atan( out_x, out_y );

+            delta     = af_angle_diff( angle_in, angle_out );

+

+            if ( delta < 2 && delta > -2 )

+              goto Is_Weak_Point;

+          }

+          else if ( point->in_dir == -point->out_dir )

+            goto Is_Weak_Point;

+        }

+      }

+    }

+

+   /* compute inflection points

+    */

+    af_glyph_hints_compute_inflections( hints );

+

+  Exit:

+    return error;

+  }

+

+

+  FT_LOCAL_DEF( void )

+  af_glyph_hints_save( AF_GlyphHints   hints,

+                       FT_Outline*     outline )

+  {

+    AF_Point    point = hints->points;

+    AF_Point    limit = point + hints->num_points;

+    FT_Vector*  vec   = outline->points;

+    char*       tag   = outline->tags;

+

+    for ( ; point < limit; point++, vec++, tag++ )

+    {

+      vec->x = (FT_Pos) point->x;

+      vec->y = (FT_Pos) point->y;

+

+      if ( point->flags & AF_FLAG_CONIC )

+        tag[0] = FT_CURVE_TAG_CONIC;

+      else if ( point->flags & AF_FLAG_CUBIC )

+        tag[0] = FT_CURVE_TAG_CUBIC;

+      else

+        tag[0] = FT_CURVE_TAG_ON;

+    }

+  }

+

+

+ /*

+  *

+  *  E D G E   P O I N T   G R I D - F I T T I N G

+  *

+  */

+

+

+  FT_LOCAL_DEF( void )

+  af_glyph_hints_align_edge_points( AF_GlyphHints  hints,

+                                    AF_Dimension   dim )

+  {

+    AF_AxisHints  axis       = & hints->axis[ dim ];

+    AF_Edge       edges      = axis->edges;

+    AF_Edge       edge_limit = edges + axis->num_edges;

+    AF_Edge       edge;

+

+    for ( edge = edges; edge < edge_limit; edge++ )

+    {

+      /* move the points of each segment     */

+      /* in each edge to the edge's position */

+      AF_Segment  seg = edge->first;

+

+

+      do

+      {

+        AF_Point  point = seg->first;

+

+

+        for (;;)

+        {

+          if ( dim == AF_DIMENSION_HORZ )

+          {

+            point->x      = edge->pos;

+            point->flags |= AF_FLAG_TOUCH_X;

+          }

+          else

+          {

+            point->y      = edge->pos;

+            point->flags |= AF_FLAG_TOUCH_Y;

+          }

+

+          if ( point == seg->last )

+            break;

+

+          point = point->next;

+        }

+

+        seg = seg->edge_next;

+

+      } while ( seg != edge->first );

+    }

+  }

+

+

+ /*

+  *

+  *  S T R O N G   P O I N T   I N T E R P O L A T I O N

+  *

+  */

+

+

+  /* hint the strong points -- this is equivalent to the TrueType `IP' */

+  /* hinting instruction                                               */

+  FT_LOCAL_DEF( void )

+  af_glyph_hints_align_strong_points( AF_GlyphHints  hints,

+                                      AF_Dimension   dim )

+  {

+    AF_Point      points      = hints->points;

+    AF_Point      point_limit = points + hints->num_points;

+    AF_AxisHints  axis        = &hints->axis[dim];

+    AF_Edge       edges       = axis->edges;

+    AF_Edge       edge_limit  = edges + axis->num_edges;

+    AF_Flags      touch_flag;

+

+

+    if ( dim == AF_DIMENSION_HORZ )

+      touch_flag = AF_FLAG_TOUCH_X;

+    else

+      touch_flag  = AF_FLAG_TOUCH_Y;

+

+    if ( edges < edge_limit )

+    {

+      AF_Point  point;

+      AF_Edge   edge;

+

+      for ( point = points; point < point_limit; point++ )

+      {

+        FT_Pos  u, ou, fu;  /* point position */

+        FT_Pos  delta;

+

+

+        if ( point->flags & touch_flag )

+          continue;

+

+        /* if this point is candidate to weak interpolation, we will  */

+        /* interpolate it after all strong points have been processed */

+        if (  ( point->flags & AF_FLAG_WEAK_INTERPOLATION ) &&

+             !( point->flags & AF_FLAG_INFLECTION )         )

+          continue;

+

+        if ( dim == AF_DIMENSION_VERT )

+        {

+          u  = point->fy;

+          ou = point->oy;

+        }

+        else

+        {

+          u  = point->fx;

+          ou = point->ox;

+        }

+

+        fu = u;

+

+        /* is the point before the first edge? */

+        edge  = edges;

+        delta = edge->fpos - u;

+        if ( delta >= 0 )

+        {

+          u = edge->pos - ( edge->opos - ou );

+          goto Store_Point;

+        }

+

+        /* is the point after the last edge? */

+        edge  = edge_limit - 1;

+        delta = u - edge->fpos;

+        if ( delta >= 0 )

+        {

+          u = edge->pos + ( ou - edge->opos );

+          goto Store_Point;

+        }

+

+        {

+          FT_UInt  min, max, mid;

+          FT_Pos   fpos;

+

+

+          /* find enclosing edges */

+          min = 0;

+          max = edge_limit - edges;

+

+          while ( min < max )

+          {

+            mid  = ( max + min ) >> 1;

+            edge = edges + mid;

+            fpos = edge->fpos;

+

+            if ( u < fpos )

+              max = mid;

+            else if ( u > fpos )

+              min = mid + 1;

+            else

+            {

+              /* we are on the edge */

+              u = edge->pos;

+              goto Store_Point;

+            }

+          }

+

+          {

+            AF_Edge  before = edges + min - 1;

+            AF_Edge  after  = edges + min + 0;

+

+

+            /* assert( before && after && before != after ) */

+            if ( before->scale == 0 )

+              before->scale = FT_DivFix( after->pos - before->pos,

+                                         after->fpos - before->fpos );

+

+            u = before->pos + FT_MulFix( fu - before->fpos,

+                                         before->scale );

+          }

+        }

+

+

+      Store_Point:

+

+        /* save the point position */

+        if ( dim == AF_DIMENSION_HORZ )

+          point->x = u;

+        else

+          point->y = u;

+

+        point->flags |= touch_flag;

+      }

+    }

+  }

+

+

+ /*

+  *

+  *  W E A K   P O I N T   I N T E R P O L A T I O N

+  *

+  */

+

+  static void

+  af_iup_shift( AF_Point  p1,

+                AF_Point  p2,

+                AF_Point  ref )

+  {

+    AF_Point  p;

+    FT_Pos    delta = ref->u - ref->v;

+

+

+    for ( p = p1; p < ref; p++ )

+      p->u = p->v + delta;

+

+    for ( p = ref + 1; p <= p2; p++ )

+      p->u = p->v + delta;

+  }

+

+

+  static void

+  af_iup_interp( AF_Point  p1,

+                 AF_Point  p2,

+                 AF_Point  ref1,

+                 AF_Point  ref2 )

+  {

+    AF_Point  p;

+    FT_Pos    u;

+    FT_Pos    v1 = ref1->v;

+    FT_Pos    v2 = ref2->v;

+    FT_Pos    d1 = ref1->u - v1;

+    FT_Pos    d2 = ref2->u - v2;

+

+

+    if ( p1 > p2 )

+      return;

+

+    if ( v1 == v2 )

+    {

+      for ( p = p1; p <= p2; p++ )

+      {

+        u = p->v;

+

+        if ( u <= v1 )

+          u += d1;

+        else

+          u += d2;

+

+        p->u = u;

+      }

+      return;

+    }

+

+    if ( v1 < v2 )

+    {

+      for ( p = p1; p <= p2; p++ )

+      {

+        u = p->v;

+

+        if ( u <= v1 )

+          u += d1;

+        else if ( u >= v2 )

+          u += d2;

+        else

+          u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 );

+

+        p->u = u;

+      }

+    }

+    else

+    {

+      for ( p = p1; p <= p2; p++ )

+      {

+        u = p->v;

+

+        if ( u <= v2 )

+          u += d2;

+        else if ( u >= v1 )

+          u += d1;

+        else

+          u = ref1->u + FT_MulDiv( u - v1, ref2->u - ref1->u, v2 - v1 );

+

+        p->u = u;

+      }

+    }

+  }

+

+

+  FT_LOCAL_DEF( void )

+  af_glyph_hints_align_weak_points( AF_GlyphHints  hints,

+                                    AF_Dimension   dim )

+  {

+    AF_Point    points        = hints->points;

+    AF_Point    point_limit   = points + hints->num_points;

+    AF_Point*   contour       = hints->contours;

+    AF_Point*   contour_limit = contour + hints->num_contours;

+    AF_Flags    touch_flag;

+    AF_Point    point;

+    AF_Point    end_point;

+    AF_Point    first_point;

+

+

+    /* PASS 1: Move segment points to edge positions */

+

+    if ( dim == AF_DIMENSION_HORZ )

+    {

+      touch_flag = AF_FLAG_TOUCH_X;

+

+      for ( point = points; point < point_limit; point++ )

+      {

+        point->u = point->x;

+        point->v = point->ox;

+      }

+    }

+    else

+    {

+      touch_flag = AF_FLAG_TOUCH_Y;

+

+      for ( point = points; point < point_limit; point++ )

+      {

+        point->u = point->y;

+        point->v = point->oy;

+      }

+    }

+

+    point   = points;

+

+    for ( ; contour < contour_limit; contour++ )

+    {

+      point       = *contour;

+      end_point   = point->prev;

+      first_point = point;

+

+      while ( point <= end_point && !( point->flags & touch_flag ) )

+        point++;

+

+      if ( point <= end_point )

+      {

+        AF_Point  first_touched = point;

+        AF_Point  cur_touched   = point;

+

+

+        point++;

+        while ( point <= end_point )

+        {

+          if ( point->flags & touch_flag )

+          {

+            /* we found two successive touched points; we interpolate */

+            /* all contour points between them                        */

+            af_iup_interp( cur_touched + 1, point - 1,

+                           cur_touched, point );

+            cur_touched = point;

+          }

+          point++;

+        }

+

+        if ( cur_touched == first_touched )

+        {

+          /* this is a special case: only one point was touched in the */

+          /* contour; we thus simply shift the whole contour           */

+          af_iup_shift( first_point, end_point, cur_touched );

+        }

+        else

+        {

+          /* now interpolate after the last touched point to the end */

+          /* of the contour                                          */

+          af_iup_interp( cur_touched + 1, end_point,

+                         cur_touched, first_touched );

+

+          /* if the first contour point isn't touched, interpolate */

+          /* from the contour start to the first touched point     */

+          if ( first_touched > points )

+            af_iup_interp( first_point, first_touched - 1,

+                           cur_touched, first_touched );

+        }

+      }

+    }

+

+    /* now save the interpolated values back to x/y */

+    if ( dim == AF_DIMENSION_HORZ )

+    {

+      for ( point = points; point < point_limit; point++ )

+        point->x = point->u;

+    }

+    else

+    {

+      for ( point = points; point < point_limit; point++ )

+        point->y = point->u;

+    }

+  }

diff --git a/src/autofit/afhints.h b/src/autofit/afhints.h
index 7283cc39e..d73b69466 100644
--- a/src/autofit/afhints.h
+++ b/src/autofit/afhints.h
@@ -1,241 +1,246 @@
-#ifndef __AFHINTS_H__
-#define __AFHINTS_H__
-
-#include "aftypes.h"
-
-FT_BEGIN_HEADER
-
- /*
-  *  The definition of outline glyph hints. These are shared by all
-  *  script analysis routines (until now)
-  *
-  */
-
-  typedef enum
-  {
-    AF_DIMENSION_HORZ = 0,  /* x coordinates, i.e. vertical segments & edges   */
-    AF_DIMENSION_VERT = 1,  /* y coordinates, i.e. horizontal segments & edges */
-
-    AF_DIMENSION_MAX  /* do not remove */
-
-  } AF_Dimension;
-
-
-  /* hint directions -- the values are computed so that two vectors are */
-  /* in opposite directions iff `dir1+dir2 == 0'                        */
-  typedef enum
-  {
-    AF_DIR_NONE  =  4,
-    AF_DIR_RIGHT =  1,
-    AF_DIR_LEFT  = -1,
-    AF_DIR_UP    =  2,
-    AF_DIR_DOWN  = -2
-
-  } AF_Direction;
-
-
-  /* point hint flags */
-  typedef enum
-  {
-    AF_FLAG_NONE    = 0,
-
-   /* point type flags */
-    AF_FLAG_CONIC   = (1 << 0),
-    AF_FLAG_CUBIC   = (1 << 1),
-    AF_FLAG_CONTROL = AF_FLAG_CONIC | AF_FLAG_CUBIC,
-
-   /* point extremum flags */
-    AF_FLAG_EXTREMA_X = (1 << 2),
-    AF_FLAG_EXTREMA_Y = (1 << 3),
-
-   /* point roundness flags */
-    AF_FLAG_ROUND_X = (1 << 4),
-    AF_FLAG_ROUND_Y = (1 << 5),
-
-   /* point touch flags */
-    AF_FLAG_TOUCH_X = (1 << 6),
-    AF_FLAG_TOUCH_Y = (1 << 7),
-
-   /* candidates for weak interpolation have this flag set */
-    AF_FLAG_WEAK_INTERPOLATION = (1 << 8),
-
-   /* all inflection points in the outline have this flag set */
-    AF_FLAG_INFLECTION         = (1 << 9)
-
-  } AF_Flags;
-
-
-  /* edge hint flags */
-  typedef enum
-  {
-    AF_EDGE_NORMAL = 0,
-    AF_EDGE_ROUND  = (1 << 0),
-    AF_EDGE_SERIF  = (1 << 1),
-    AF_EDGE_DONE   = (1 << 2)
-
-  } AF_Edge_Flags;
-
-
-
-  typedef struct AF_PointRec_*    AF_Point;
-  typedef struct AF_SegmentRec_*  AF_Segment;
-  typedef struct AF_EdgeRec_*     AF_Edge;
-
-
-  typedef struct  AF_PointRec_
-  {
-    AF_Flags      flags;    /* point flags used by hinter */
-    FT_Pos        ox, oy;   /* original, scaled position  */
-    FT_Pos        fx, fy;   /* original, unscaled position (font units) */
-    FT_Pos        x,  y;    /* current position */
-    FT_Pos        u,  v;    /* current (x,y) or (y,x) depending on context */
-
-    AF_Direction  in_dir;   /* direction of inwards vector  */
-    AF_Direction  out_dir;  /* direction of outwards vector */
-
-    AF_Point      next;     /* next point in contour     */
-    AF_Point      prev;     /* previous point in contour */
-
-  } AF_PointRec;
-
-
-  typedef struct  AF_SegmentRec_
-  {
-    AF_Edge_Flags  flags;       /* edge/segment flags for this segment */
-    AF_Direction   dir;         /* segment direction                   */
-    FT_Pos         pos;         /* position of segment                 */
-    FT_Pos         min_coord;   /* minimum coordinate of segment       */
-    FT_Pos         max_coord;   /* maximum coordinate of segment       */
-
-    AF_Edge        edge;        /* the segment's parent edge */
-    AF_Segment     edge_next;   /* link to next segment in parent edge */
-
-    AF_Segment     link;        /* (stem) link segment        */
-    AF_Segment     serif;       /* primary segment for serifs */
-    FT_Pos         num_linked;  /* number of linked segments  */
-    FT_Pos         score;       /* used during stem matching  */
-
-    AF_Point       first;       /* first point in edge segment             */
-    AF_Point       last;        /* last point in edge segment              */
-    AF_Point*      contour;     /* ptr to first point of segment's contour */
-
-  } AF_SegmentRec;
-
-
-  typedef struct  AF_EdgeRec_
-  {
-    FT_Pos         fpos;       /* original, unscaled position (font units) */
-    FT_Pos         opos;       /* original, scaled position                */
-    FT_Pos         pos;        /* current position                         */
-
-    AF_Edge_Flags  flags;      /* edge flags */
-    AF_Direction   dir;        /* edge direction */
-    FT_Fixed       scale;      /* used to speed up interpolation between edges */
-    AF_Width       blue_edge;  /* non-NULL if this is a blue edge              */
-
-    AF_Edge        link;
-    AF_Edge        serif;
-    FT_Int         num_linked;
-
-    FT_Int         score;
-
-    AF_Segment     first;
-    AF_Segment     last;
-
-  } AF_EdgeRec;
-
-
-  typedef struct AF_AxisHintsRec_
-  {
-    FT_Int        num_segments;
-    AF_Segment    segments;
-
-    FT_Int        num_edges;
-    AF_Edge       edges;
-
-    AF_Direction  major_dir;
-
-  } AF_AxisHintsRec, *AF_AxisHints;
-
-
-  typedef struct AF_GlyphHintsRec_
-  {
-    FT_Memory     memory;
-
-    FT_Fixed      x_scale;
-    FT_Pos        x_delta;
-
-    FT_Fixed      y_scale;
-    FT_Pos        y_delta;
-
-    FT_Pos        edge_distance_threshold;
-
-    FT_Int        max_points;
-    FT_Int        num_points;
-    AF_Point      points;
-
-    FT_Int        max_contours;
-    FT_Int        num_contours;
-    AF_Point*     contours;
-
-    AF_AxisHintsRec  axis[ AF_DIMENSION_MAX ];
-    
-    FT_UInt32         scaler_flags;  /* copy of scaler flags */
-    FT_UInt32         other_flags;   /* free for script-specific implementations */
-    AF_ScriptMetrics  metrics;
-
-  } AF_GlyphHintsRec;
-
-
-#define  AF_HINTS_TEST_SCALER(h,f)  ( (h)->scaler_flags & (f) )
-#define  AF_HINTS_TEST_OTHER(h,f)   ( (h)->other_flags  & (f) )
-
-#define  AF_HINTS_DO_HORIZONTAL(h)  \
-            !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_HORIZONTAL)
-
-#define  AF_HINTS_DO_VERTICAL(h)    \
-            !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_VERTICAL)
-
-#define  AF_HINTS_DO_ADVANCE(h)     \
-            !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_ADVANCE)
-
-
-  FT_LOCAL( AF_Direction )
-  af_direction_compute( FT_Pos  dx,
-                        FT_Pos  dy );
-
-
-  FT_LOCAL( void )
-  af_glyph_hints_init( AF_GlyphHints  hints,
-                       FT_Memory      memory );
-
-
-
- /*  recomputes all AF_Point in a AF_GlyphHints from the definitions
-  *  in a source outline
-  */
-  FT_LOCAL( FT_Error )
-  af_glyph_hints_reset( AF_GlyphHints  hints,
-                        AF_Scaler      scaler,
-                        FT_Outline*    outline );
-
-  FT_LOCAL( void )
-  af_glyph_hints_align_edge_points( AF_GlyphHints  hints,
-                                    AF_Dimension   dim );
-
-  FT_LOCAL( void )
-  af_glyph_hints_align_strong_points( AF_GlyphHints  hints,
-                                      AF_Dimension   dim );
-
-  FT_LOCAL( void )
-  af_glyph_hints_align_weak_points( AF_GlyphHints  hints,
-                                    AF_Dimension   dim );
-
-  FT_LOCAL( void )
-  af_glyph_hints_done( AF_GlyphHints  hints );
-
-/* */
-
-FT_END_HEADER
-
-#endif /* __AFHINTS_H__ */
+#ifndef __AFHINTS_H__

+#define __AFHINTS_H__

+

+#include "aftypes.h"

+

+FT_BEGIN_HEADER

+

+ /*

+  *  The definition of outline glyph hints. These are shared by all

+  *  script analysis routines (until now)

+  *

+  */

+

+  typedef enum

+  {

+    AF_DIMENSION_HORZ = 0,  /* x coordinates, i.e. vertical segments & edges   */

+    AF_DIMENSION_VERT = 1,  /* y coordinates, i.e. horizontal segments & edges */

+

+    AF_DIMENSION_MAX  /* do not remove */

+

+  } AF_Dimension;

+

+

+  /* hint directions -- the values are computed so that two vectors are */

+  /* in opposite directions iff `dir1+dir2 == 0'                        */

+  typedef enum

+  {

+    AF_DIR_NONE  =  4,

+    AF_DIR_RIGHT =  1,

+    AF_DIR_LEFT  = -1,

+    AF_DIR_UP    =  2,

+    AF_DIR_DOWN  = -2

+

+  } AF_Direction;

+

+

+  /* point hint flags */

+  typedef enum

+  {

+    AF_FLAG_NONE    = 0,

+

+   /* point type flags */

+    AF_FLAG_CONIC   = (1 << 0),

+    AF_FLAG_CUBIC   = (1 << 1),

+    AF_FLAG_CONTROL = AF_FLAG_CONIC | AF_FLAG_CUBIC,

+

+   /* point extremum flags */

+    AF_FLAG_EXTREMA_X = (1 << 2),

+    AF_FLAG_EXTREMA_Y = (1 << 3),

+

+   /* point roundness flags */

+    AF_FLAG_ROUND_X = (1 << 4),

+    AF_FLAG_ROUND_Y = (1 << 5),

+

+   /* point touch flags */

+    AF_FLAG_TOUCH_X = (1 << 6),

+    AF_FLAG_TOUCH_Y = (1 << 7),

+

+   /* candidates for weak interpolation have this flag set */

+    AF_FLAG_WEAK_INTERPOLATION = (1 << 8),

+

+   /* all inflection points in the outline have this flag set */

+    AF_FLAG_INFLECTION         = (1 << 9)

+

+  } AF_Flags;

+

+

+  /* edge hint flags */

+  typedef enum

+  {

+    AF_EDGE_NORMAL = 0,

+    AF_EDGE_ROUND  = (1 << 0),

+    AF_EDGE_SERIF  = (1 << 1),

+    AF_EDGE_DONE   = (1 << 2)

+

+  } AF_Edge_Flags;

+

+

+

+  typedef struct AF_PointRec_*    AF_Point;

+  typedef struct AF_SegmentRec_*  AF_Segment;

+  typedef struct AF_EdgeRec_*     AF_Edge;

+

+

+  typedef struct  AF_PointRec_

+  {

+    AF_Flags      flags;    /* point flags used by hinter */

+    FT_Pos        ox, oy;   /* original, scaled position  */

+    FT_Pos        fx, fy;   /* original, unscaled position (font units) */

+    FT_Pos        x,  y;    /* current position */

+    FT_Pos        u,  v;    /* current (x,y) or (y,x) depending on context */

+

+    AF_Direction  in_dir;   /* direction of inwards vector  */

+    AF_Direction  out_dir;  /* direction of outwards vector */

+

+    AF_Point      next;     /* next point in contour     */

+    AF_Point      prev;     /* previous point in contour */

+

+  } AF_PointRec;

+

+

+  typedef struct  AF_SegmentRec_

+  {

+    AF_Edge_Flags  flags;       /* edge/segment flags for this segment */

+    AF_Direction   dir;         /* segment direction                   */

+    FT_Pos         pos;         /* position of segment                 */

+    FT_Pos         min_coord;   /* minimum coordinate of segment       */

+    FT_Pos         max_coord;   /* maximum coordinate of segment       */

+

+    AF_Edge        edge;        /* the segment's parent edge */

+    AF_Segment     edge_next;   /* link to next segment in parent edge */

+

+    AF_Segment     link;        /* (stem) link segment        */

+    AF_Segment     serif;       /* primary segment for serifs */

+    FT_Pos         num_linked;  /* number of linked segments  */

+    FT_Pos         score;       /* used during stem matching  */

+

+    AF_Point       first;       /* first point in edge segment             */

+    AF_Point       last;        /* last point in edge segment              */

+    AF_Point*      contour;     /* ptr to first point of segment's contour */

+

+  } AF_SegmentRec;

+

+

+  typedef struct  AF_EdgeRec_

+  {

+    FT_Pos         fpos;       /* original, unscaled position (font units) */

+    FT_Pos         opos;       /* original, scaled position                */

+    FT_Pos         pos;        /* current position                         */

+

+    AF_Edge_Flags  flags;      /* edge flags */

+    AF_Direction   dir;        /* edge direction */

+    FT_Fixed       scale;      /* used to speed up interpolation between edges */

+    AF_Width       blue_edge;  /* non-NULL if this is a blue edge              */

+

+    AF_Edge        link;

+    AF_Edge        serif;

+    FT_Int         num_linked;

+

+    FT_Int         score;

+

+    AF_Segment     first;

+    AF_Segment     last;

+

+  } AF_EdgeRec;

+

+

+  typedef struct AF_AxisHintsRec_

+  {

+    FT_Int        num_segments;

+    AF_Segment    segments;

+

+    FT_Int        num_edges;

+    AF_Edge       edges;

+

+    AF_Direction  major_dir;

+

+  } AF_AxisHintsRec, *AF_AxisHints;

+

+

+  typedef struct AF_GlyphHintsRec_

+  {

+    FT_Memory     memory;

+

+    FT_Fixed      x_scale;

+    FT_Pos        x_delta;

+

+    FT_Fixed      y_scale;

+    FT_Pos        y_delta;

+

+    FT_Pos        edge_distance_threshold;

+

+    FT_Int        max_points;

+    FT_Int        num_points;

+    AF_Point      points;

+

+    FT_Int        max_contours;

+    FT_Int        num_contours;

+    AF_Point*     contours;

+

+    AF_AxisHintsRec  axis[ AF_DIMENSION_MAX ];

+    

+    FT_UInt32         scaler_flags;  /* copy of scaler flags */

+    FT_UInt32         other_flags;   /* free for script-specific implementations */

+    AF_ScriptMetrics  metrics;

+

+  } AF_GlyphHintsRec;

+

+

+#define  AF_HINTS_TEST_SCALER(h,f)  ( (h)->scaler_flags & (f) )

+#define  AF_HINTS_TEST_OTHER(h,f)   ( (h)->other_flags  & (f) )

+

+#define  AF_HINTS_DO_HORIZONTAL(h)  \

+            !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_HORIZONTAL)

+

+#define  AF_HINTS_DO_VERTICAL(h)    \

+            !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_VERTICAL)

+

+#define  AF_HINTS_DO_ADVANCE(h)     \

+            !AF_HINTS_TEST_SCALER(h,AF_SCALER_FLAG_NO_ADVANCE)

+

+

+  FT_LOCAL( AF_Direction )

+  af_direction_compute( FT_Pos  dx,

+                        FT_Pos  dy );

+

+

+  FT_LOCAL( void )

+  af_glyph_hints_init( AF_GlyphHints  hints,

+                       FT_Memory      memory );

+

+

+

+ /*  recomputes all AF_Point in a AF_GlyphHints from the definitions

+  *  in a source outline

+  */

+  FT_LOCAL( FT_Error )

+  af_glyph_hints_reset( AF_GlyphHints     hints,

+                        AF_Scaler         scaler,

+                        AF_ScriptMetrics  metrics,

+                        FT_Outline*       outline );

+

+  FT_LOCAL( void )

+  af_glyph_hints_save( AF_GlyphHints   hints,

+                       FT_Outline*     outline );

+

+  FT_LOCAL( void )

+  af_glyph_hints_align_edge_points( AF_GlyphHints  hints,

+                                    AF_Dimension   dim );

+

+  FT_LOCAL( void )

+  af_glyph_hints_align_strong_points( AF_GlyphHints  hints,

+                                      AF_Dimension   dim );

+

+  FT_LOCAL( void )

+  af_glyph_hints_align_weak_points( AF_GlyphHints  hints,

+                                    AF_Dimension   dim );

+

+  FT_LOCAL( void )

+  af_glyph_hints_done( AF_GlyphHints  hints );

+

+/* */

+

+FT_END_HEADER

+

+#endif /* __AFHINTS_H__ */

diff --git a/src/autofit/aflatin.c b/src/autofit/aflatin.c
index 0ddc562ac..131bff666 100644
--- a/src/autofit/aflatin.c
+++ b/src/autofit/aflatin.c
@@ -1,1784 +1,1791 @@
-#include "aflatin.h"
-
- /***************************************************************************/
- /***************************************************************************/
- /*****                                                                 *****/
- /*****       L A T I N   G L O B A L   M E T R I C S                   *****/
- /*****                                                                 *****/
- /***************************************************************************/
- /***************************************************************************/
-
-  static void
-  af_latin_metrics_init_widths( AF_LatinMetrics  metrics,
-                                FT_Face          face )
-  {
-    /* scan the array of segments in each direction */
-    AF_GlyphHintsRec  hints[1];
-
-    af_glyph_hints_init( hints, face->memory );
-
-    metrics->axis[ AF_DIMENSION_HORZ ].width_count = 0;
-    metrics->axis[ AF_DIMENSION_VERT ].width_count = 0;
-
-    /* For now, compute the standard width and height from the `o' */
-    {
-      FT_Error      error;
-      FT_UInt       glyph_index;
-      AF_Dimension  dim;
-      AF_ScalerRec  scaler[1];
-
-
-      glyph_index = FT_Get_Char_Index( face, 'o' );
-      if ( glyph_index == 0 )
-        goto Exit;
-
-      error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
-      if ( error || face->glyph->outline.n_points <= 0 )
-        goto Exit;
-
-      scaler->x_scale     = scaler->y_scale = 0x10000L;
-      scaler->x_delta     = scaler->y_delta = 0;
-      scaler->face        = face;
-      scaler->render_mode = 0;
-      scaler->flags       = 0;
-
-      error = af_glyph_hints_reset( hints, scaler, &face->glyph->outline );
-      if ( error )
-        goto Exit;
-
-      for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
-      {
-        AF_LatinAxis  axis    = & metrics->axis[ dim ];
-        AF_AxisHints  axhints = & hints->axis[ dim ];
-        AF_Segment    seg, limit, link;
-        FT_UInt       num_widths = 0;
-        FT_Pos        edge_distance_threshold = 32000;
-
-        af_latin_hints_compute_segments( hints, dim );
-        af_latin_hints_link_segments   ( hints, dim );
-
-        seg   = axhints->segments;
-        limit = seg + axhints->num_segments;
-
-        for ( ; seg < limit; seg++ )
-        {
-          link = seg->link;
-          /* we only consider stem segments there! */
-          if ( link && link->link == seg && link > seg )
-          {
-            FT_Pos  dist;
-
-
-            dist = seg->pos - link->pos;
-            if ( dist < 0 )
-              dist = -dist;
-
-            if ( num_widths < AF_LATIN_MAX_WIDTHS )
-              axis->widths[ num_widths++ ].org = dist;
-          }
-        }
-
-        af_sort_widths( num_widths, axis->widths );
-        axis->width_count = num_widths;
-
-        /* we will now try to find the smallest width */
-        if ( num_widths > 0 && axis->widths[0].org < edge_distance_threshold )
-          edge_distance_threshold = axis->widths[0].org;
-
-        /* Now, compute the edge distance threshold as a fraction of the */
-        /* smallest width in the font. Set it in `hinter->glyph' too!    */
-        if ( edge_distance_threshold == 32000 )
-          edge_distance_threshold = 50;
-
-        /* let's try 20% */
-        axis->edge_distance_threshold = edge_distance_threshold / 5;
-      }
-    }
-
-  Exit:
-    af_glyph_hints_done( hints );
-  }
-
-
-
-#define AF_LATIN_MAX_TEST_CHARACTERS  12
-
-
-  static  const char* const  af_latin_blue_chars[ AF_LATIN_MAX_BLUES ] =
-  {
-    "THEZOCQS",
-    "HEZLOCUS",
-    "fijkdbh",
-    "xzroesc",
-    "xzroesc",
-    "pqgjy"
-  };
-
-
-  static void
-  af_latin_metrics_init_blues( AF_LatinMetrics  metrics,
-                               FT_Face          face )
-  {
-    FT_Pos        flats [ AF_LATIN_MAX_TEST_CHARACTERS ];
-    FT_Pos        rounds[ AF_LATIN_MAX_TEST_CHARACTERS ];
-    FT_Int        num_flats;
-    FT_Int        num_rounds;
-    FT_Int        bb;
-    AF_LatinBlue  blue;
-    FT_Error      error;
-    AF_LatinAxis  axis  = &metrics->axis[ AF_DIMENSION_VERT ];
-    FT_GlyphSlot  glyph = face->glyph;
-
-    /* we compute the blues simply by loading each character from the    */
-    /* 'af_latin_blue_chars[blues]' string, then compute its top-most or */
-    /* bottom-most points (depending on `AF_IS_TOP_BLUE')                */
-
-    AF_LOG(( "blue zones computation\n" ));
-    AF_LOG(( "------------------------------------------------\n" ));
-
-    for ( bb = 0; bb < AF_LATIN_BLUE_MAX; bb++ )
-    {
-      const char*  p     = af_latin_blue_chars[bb];
-      const char*  limit = p + AF_LATIN_MAX_TEST_CHARACTERS;
-      FT_Pos*      blue_ref;
-      FT_Pos*      blue_shoot;
-
-      AF_LOG(( "blue %3d: ", blue ));
-
-      num_flats  = 0;
-      num_rounds = 0;
-
-      for ( ; p < limit && *p; p++ )
-      {
-        FT_UInt     glyph_index;
-        FT_Vector*  extremum;
-        FT_Vector*  points;
-        FT_Vector*  point_limit;
-        FT_Vector*  point;
-        FT_Bool     round;
-
-
-        AF_LOG(( "'%c'", *p ));
-
-        /* load the character in the face -- skip unknown or empty ones */
-        glyph_index = FT_Get_Char_Index( face, (FT_UInt)*p );
-        if ( glyph_index == 0 )
-          continue;
-
-        error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
-        if ( error || glyph->outline.n_points <= 0 )
-          continue;
-
-        /* now compute min or max point indices and coordinates */
-        points      = glyph->outline.points;
-        point_limit = points + glyph->outline.n_points;
-        point       = points;
-        extremum    = point;
-        point++;
-
-        if ( AF_LATIN_IS_TOP_BLUE( bb ) )
-        {
-          for ( ; point < point_limit; point++ )
-            if ( point->y > extremum->y )
-              extremum = point;
-        }
-        else
-        {
-          for ( ; point < point_limit; point++ )
-            if ( point->y < extremum->y )
-              extremum = point;
-        }
-
-        AF_LOG(( "%5d", (int)extremum->y ));
-
-        /* now, check whether the point belongs to a straight or round  */
-        /* segment; we first need to find in which contour the extremum */
-        /* lies, then see its previous and next points                  */
-        {
-          FT_Int  idx = (FT_Int)( extremum - points );
-          FT_Int  n;
-          FT_Int  first, last, prev, next, end;
-          FT_Pos  dist;
-
-
-          last  = -1;
-          first = 0;
-
-          for ( n = 0; n < glyph->outline.n_contours; n++ )
-          {
-            end = glyph->outline.contours[n];
-            if ( end >= idx )
-            {
-              last = end;
-              break;
-            }
-            first = end + 1;
-          }
-
-          /* XXX: should never happen! */
-          if ( last < 0 )
-            continue;
-
-          /* now look for the previous and next points that are not on the */
-          /* same Y coordinate.  Threshold the `closeness'...              */
-
-          prev = idx;
-          next = prev;
-
-          do
-          {
-            if ( prev > first )
-              prev--;
-            else
-              prev = last;
-
-            dist = points[prev].y - extremum->y;
-            if ( dist < -5 || dist > 5 )
-              break;
-
-          } while ( prev != idx );
-
-          do
-          {
-            if ( next < last )
-              next++;
-            else
-              next = first;
-
-            dist = points[next].y - extremum->y;
-            if ( dist < -5 || dist > 5 )
-              break;
-
-          } while ( next != idx );
-
-          /* now, set the `round' flag depending on the segment's kind */
-          round = FT_BOOL(
-            FT_CURVE_TAG( glyph->outline.tags[prev] ) != FT_CURVE_TAG_ON ||
-            FT_CURVE_TAG( glyph->outline.tags[next] ) != FT_CURVE_TAG_ON );
-
-          AF_LOG(( "%c ", round ? 'r' : 'f' ));
-        }
-
-        if ( round )
-          rounds[num_rounds++] = extremum->y;
-        else
-          flats[num_flats++] = extremum->y;
-      }
-
-      AF_LOG(( "\n" ));
-
-      if ( num_flats == 0 && num_rounds == 0 )
-      {
-       /* we couldn't find a single glyph to compute this blue zone,
-        * we will simply ignore it then
-        */
-        AF_LOG(( "empty !!\n" ));
-        continue;
-      }
-
-      /* we have computed the contents of the `rounds' and `flats' tables, */
-      /* now determine the reference and overshoot position of the blue -- */
-      /* we simply take the median value after a simple sort               */
-      af_sort_pos( num_rounds, rounds );
-      af_sort_pos( num_flats,  flats );
-
-      blue       = & axis->blues[ axis->blue_count ];
-      blue_ref   = & blue->ref.org;
-      blue_shoot = & blue->shoot.org;
-
-      axis->blue_count ++;
-
-      if ( num_flats == 0 )
-      {
-        *blue_ref    =
-        *blue_shoot = rounds[num_rounds / 2];
-      }
-      else if ( num_rounds == 0 )
-      {
-        *blue_ref   =
-        *blue_shoot = flats[num_flats / 2];
-      }
-      else
-      {
-        *blue_ref   = flats[num_flats / 2];
-        *blue_shoot = rounds[num_rounds / 2];
-      }
-
-      /* there are sometimes problems: if the overshoot position of top     */
-      /* zones is under its reference position, or the opposite for bottom  */
-      /* zones.  We must thus check everything there and correct the errors */
-      if ( *blue_shoot != *blue_ref )
-      {
-        FT_Pos   ref      = *blue_ref;
-        FT_Pos   shoot    = *blue_shoot;
-        FT_Bool  over_ref = FT_BOOL( shoot > ref );
-
-
-        if ( AF_LATIN_IS_TOP_BLUE( bb ) ^ over_ref )
-          *blue_shoot = *blue_ref = ( shoot + ref ) / 2;
-      }
-
-      blue->flags = 0;
-      if ( AF_LATIN_IS_TOP_BLUE(bb) )
-        blue->flags |= AF_LATIN_BLUE_TOP;
-
-      AF_LOG(( "-- ref = %ld, shoot = %ld\n", *blue_ref, *blue_shoot ));
-    }
-
-    return;
-  }
-
-
-  static FT_Error
-  af_latin_metrics_init( AF_LatinMetrics  metrics,
-                         FT_Face          face )
-  {
-    FT_Error      error;
-    FT_CharMap    oldmap = face->charmap;
-
-    /* do we have a Unicode charmap in there? */
-    error = FT_Select_Charmap( face, FT_ENCODING_UNICODE );
-    if ( error ) goto Exit;
-
-    metrics->units_per_em = face->units_per_EM;
-
-    af_latin_metrics_init_widths( metrics, face );
-    af_latin_metrics_init_blues( metrics, face );
-
-  Exit:
-    FT_Set_Charmap( face, oldmap );
-    return error;
-  }
-
-
-  static void
-  af_latin_metrics_scale_dim( AF_LatinMetrics   metrics,
-                              AF_Scaler         scaler,
-                              AF_Dimension      dim )
-  {
-    FT_Fixed      scale;
-    FT_Pos        delta;
-    AF_LatinAxis  axis;
-    FT_UInt       nn;
-
-    if ( dim == AF_DIMENSION_HORZ )
-    {
-      scale = scaler->x_scale;
-      delta = scaler->x_delta;
-    }
-    else
-    {
-      scale = scaler->y_scale;
-      delta = scaler->y_delta;
-    }
-
-    axis = & metrics->axis[ dim ];
-
-    if ( axis->org_scale == scale && axis->org_delta == delta )
-      return;
-
-    axis->org_scale = scale;
-    axis->org_delta = delta;
-
-   /* XXX: TODO: Correct Y and X scale according to Chester rules
-    */
-    axis->scale = scale;
-    axis->delta = delta;
-
-    if ( dim == AF_DIMENSION_HORZ )
-    {
-      metrics->scaler.x_scale = scale;
-      metrics->scaler.x_delta = delta;
-    }
-    else
-    {
-      metrics->scaler.y_scale = scale;
-      metrics->scaler.y_delta = delta;
-    }
-
-   /* scale the standard widths
-    */
-    for ( nn = 0; nn < axis->width_count; nn++ )
-    {
-      AF_Width  width = axis->widths + nn;
-
-      width->cur = FT_MulFix( width->org, scale );
-      width->fit = width->cur;
-    }
-
-    if ( dim == AF_DIMENSION_VERT )
-    {
-     /* scale the blue zones
-      */
-      for ( nn = 0; nn < axis->blue_count; nn++ )
-      {
-        AF_LatinBlue  blue  = & axis->blues[nn];
-        FT_Pos        dist;
-
-        blue->ref.cur = FT_MulFix( blue->ref.org, scale ) + delta;
-        blue->ref.fit = blue->ref.cur;
-
-        blue->shoot.cur = FT_MulFix( blue->shoot.org, scale ) + delta;
-        blue->shoot.fit = blue->shoot.cur;
-
-       /* a blue zone is only active when it is less than 3/4 pixels tall
-        */
-        dist = FT_MulFix( blue->ref.org - blue->shoot.org, scale );
-        if ( dist >= 48 || dist <= -48 )
-          blue->flags |= ~AF_LATIN_BLUE_ACTIVE;
-      }
-    }
-  }
-
-
-  FT_LOCAL_DEF( void )
-  af_latin_metrics_scale( AF_LatinMetrics  metrics,
-                          AF_Scaler        scaler )
-  {
-    metrics->scaler = scaler[0];
-
-    af_latin_metrics_scale_dim( metrics, scaler, AF_DIMENSION_HORZ );
-    af_latin_metrics_scale_dim( metrics, scaler, AF_DIMENSION_VERT );
-  }
-
-
- /***************************************************************************/
- /***************************************************************************/
- /*****                                                                 *****/
- /*****            L A T I N   G L Y P H   A N A L Y S I S              *****/
- /*****                                                                 *****/
- /***************************************************************************/
- /***************************************************************************/
-
-  FT_LOCAL_DEF( void )
-  af_latin_hints_compute_segments( AF_GlyphHints  hints,
-                                   AF_Dimension   dim )
-  {
-    AF_AxisHints  axis = &hints->axis[dim];
-    AF_Segment    segments = axis->segments;
-    AF_Segment    segment       =  segments;
-    FT_Int        num_segments  =  0;
-    AF_Point*     contour       =  hints->contours;
-    AF_Point*     contour_limit =  contour + hints->num_contours;
-    AF_Direction  major_dir, segment_dir;
-
-#ifdef AF_HINT_METRICS
-    AF_Point    min_point     =  0;
-    AF_Point    max_point     =  0;
-    FT_Pos      min_coord     =  32000;
-    FT_Pos      max_coord     = -32000;
-#endif
-
-    major_dir   = ABS( axis->major_dir );
-    segment_dir = major_dir;
-
-    /* set up (u,v) in each point */
-    if ( dim == AF_DIMENSION_HORZ )
-    {
-      AF_Point  point = hints->points;
-      AF_Point  limit = point + hints->num_points;
-
-      for ( ; point < limit; point++ )
-      {
-        point->u = point->fx;
-        point->v = point->fy;
-      }
-    }
-    else
-    {
-      AF_Point  point = hints->points;
-      AF_Point  limit = point + hints->num_points;
-
-      for ( ; point < limit; point++ )
-      {
-        point->u = point->fy;
-        point->v = point->fx;
-      }
-    }
-
-
-    /* do each contour separately */
-    for ( ; contour < contour_limit; contour++ )
-    {
-      AF_Point  point   =  contour[0];
-      AF_Point  last    =  point->prev;
-      int       on_edge =  0;
-      FT_Pos    min_pos =  32000;  /* minimum segment pos != min_coord */
-      FT_Pos    max_pos = -32000;  /* maximum segment pos != max_coord */
-      FT_Bool   passed;
-
-
-#ifdef AF_HINT_METRICS
-      if ( point->u < min_coord )
-      {
-        min_coord = point->u;
-        min_point = point;
-      }
-      if ( point->u > max_coord )
-      {
-        max_coord = point->u;
-        max_point = point;
-      }
-#endif
-
-      if ( point == last )  /* skip singletons -- just in case */
-        continue;
-
-      if ( ABS( last->out_dir )  == major_dir &&
-           ABS( point->out_dir ) == major_dir )
-      {
-        /* we are already on an edge, try to locate its start */
-        last = point;
-
-        for (;;)
-        {
-          point = point->prev;
-          if ( ABS( point->out_dir ) != major_dir )
-          {
-            point = point->next;
-            break;
-          }
-          if ( point == last )
-            break;
-        }
-      }
-
-      last   = point;
-      passed = 0;
-
-      for (;;)
-      {
-        FT_Pos  u, v;
-
-
-        if ( on_edge )
-        {
-          u = point->u;
-          if ( u < min_pos )
-            min_pos = u;
-          if ( u > max_pos )
-            max_pos = u;
-
-          if ( point->out_dir != segment_dir || point == last )
-          {
-            /* we are just leaving an edge; record a new segment! */
-            segment->last = point;
-            segment->pos  = ( min_pos + max_pos ) >> 1;
-
-            /* a segment is round if either its first or last point */
-            /* is a control point                                   */
-            if ( ( segment->first->flags | point->flags ) &
-                   AF_FLAG_CONTROL                        )
-              segment->flags |= AF_EDGE_ROUND;
-
-            /* compute segment size */
-            min_pos = max_pos = point->v;
-
-            v = segment->first->v;
-            if ( v < min_pos )
-              min_pos = v;
-            if ( v > max_pos )
-              max_pos = v;
-
-            segment->min_coord = min_pos;
-            segment->max_coord = max_pos;
-
-            on_edge = 0;
-            num_segments++;
-            segment++;
-            /* fallthrough */
-          }
-        }
-
-        /* now exit if we are at the start/end point */
-        if ( point == last )
-        {
-          if ( passed )
-            break;
-          passed = 1;
-        }
-
-        if ( !on_edge && ABS( point->out_dir ) == major_dir )
-        {
-          /* this is the start of a new segment! */
-          segment_dir = point->out_dir;
-
-          /* clear all segment fields */
-          FT_ZERO( segment );
-
-          segment->dir      = segment_dir;
-          segment->flags    = AF_EDGE_NORMAL;
-          min_pos = max_pos = point->u;
-          segment->first    = point;
-          segment->last     = point;
-          segment->contour  = contour;
-          segment->score    = 32000;
-          segment->link     = NULL;
-          on_edge           = 1;
-
-#ifdef AF_HINT_METRICS
-          if ( point == max_point )
-            max_point = 0;
-
-          if ( point == min_point )
-            min_point = 0;
-#endif
-        }
-
-        point = point->next;
-      }
-
-    } /* contours */
-
-#ifdef AF_HINT_METRICS
-    /* we need to ensure that there are edges on the left-most and  */
-    /* right-most points of the glyph in order to hint the metrics; */
-    /* we do this by inserting fake segments when needed            */
-    if ( dim == AF_DIMENSION_HORZ )
-    {
-      AF_Point  point       = hints->points;
-      AF_Point  point_limit = point + hints->num_points;
-
-      FT_Pos    min_pos =  32000;
-      FT_Pos    max_pos = -32000;
-
-
-      min_point = 0;
-      max_point = 0;
-
-      /* compute minimum and maximum points */
-      for ( ; point < point_limit; point++ )
-      {
-        FT_Pos  x = point->fx;
-
-
-        if ( x < min_pos )
-        {
-          min_pos   = x;
-          min_point = point;
-        }
-        if ( x > max_pos )
-        {
-          max_pos   = x;
-          max_point = point;
-        }
-      }
-
-      /* insert minimum segment */
-      if ( min_point )
-      {
-        /* clear all segment fields */
-        FT_ZERO( segment );
-
-        segment->dir   = segment_dir;
-        segment->flags = AF_EDGE_NORMAL;
-        segment->first = min_point;
-        segment->last  = min_point;
-        segment->pos   = min_pos;
-        segment->score = 32000;
-        segment->link  = NULL;
-
-        num_segments++;
-        segment++;
-      }
-
-      /* insert maximum segment */
-      if ( max_point )
-      {
-        /* clear all segment fields */
-        FT_ZERO( segment );
-
-        segment->dir   = segment_dir;
-        segment->flags = AF_EDGE_NORMAL;
-        segment->first = max_point;
-        segment->last  = max_point;
-        segment->pos   = max_pos;
-        segment->score = 32000;
-        segment->link  = NULL;
-
-        num_segments++;
-        segment++;
-      }
-    }
-#endif /* AF_HINT_METRICS */
-
-    axis->num_segments = num_segments;
-  }
-
-
-  FT_LOCAL_DEF( void )
-  af_latin_hints_link_segments( AF_GlyphHints  hints,
-                                AF_Dimension   dim )
-  {
-    AF_AxisHints  axis          = &hints->axis[dim];
-    AF_Segment    segments      = axis->segments;
-    AF_Segment    segment_limit = segments + axis->num_segments;
-    AF_Direction  major_dir     = axis->major_dir;
-    AF_Segment    seg1, seg2;
-
-    /* now compare each segment to the others */
-    for ( seg1 = segments; seg1 < segment_limit; seg1++ )
-    {
-      /* the fake segments are introduced to hint the metrics -- */
-      /* we must never link them to anything                     */
-      if ( seg1->first == seg1->last || seg1->dir != major_dir )
-        continue;
-
-      for ( seg2 = segments; seg2 < segment_limit; seg2++ )
-        if ( seg2 != seg1 && seg1->dir + seg2->dir == 0 )
-        {
-          FT_Pos  pos1 = seg1->pos;
-          FT_Pos  pos2 = seg2->pos;
-          FT_Pos  dist = pos2 - pos1;
-
-
-          if ( dist < 0 )
-            continue;
-
-          {
-            FT_Pos  min = seg1->min_coord;
-            FT_Pos  max = seg1->max_coord;
-            FT_Pos  len, score;
-
-
-            if ( min < seg2->min_coord )
-              min = seg2->min_coord;
-
-            if ( max > seg2->max_coord )
-              max = seg2->max_coord;
-
-            len = max - min;
-            if ( len >= 8 )
-            {
-              score = dist + 3000 / len;
-
-              if ( score < seg1->score )
-              {
-                seg1->score = score;
-                seg1->link  = seg2;
-              }
-
-              if ( score < seg2->score )
-              {
-                seg2->score = score;
-                seg2->link  = seg1;
-              }
-            }
-          }
-        }
-    }
-
-    /* now, compute the `serif' segments */
-    for ( seg1 = segments; seg1 < segment_limit; seg1++ )
-    {
-      seg2 = seg1->link;
-
-      if ( seg2 )
-      {
-        seg2->num_linked++;
-        if ( seg2->link != seg1 )
-        {
-          seg1->link  = 0;
-          seg1->serif = seg2->link;
-        }
-      }
-    }
-  }
-
-
-  FT_LOCAL_DEF( void )
-  af_latin_hints_compute_edges( AF_GlyphHints  hints,
-                                AF_Dimension   dim )
-  {
-    AF_AxisHints  axis = &hints->axis[dim];
-    AF_Edge       edges = axis->edges;
-    AF_Edge       edge, edge_limit;
-
-    AF_Segment    segments = axis->segments;
-    AF_Segment    segment_limit = segments + axis->num_segments;
-    AF_Segment    seg;
-
-    AF_Direction  up_dir;
-    FT_Fixed      scale;
-    FT_Pos        edge_distance_threshold;
-
-
-    scale = ( dim == AF_DIMENSION_HORZ ) ? hints->x_scale
-                                         : hints->y_scale;
-
-    up_dir = ( dim == AF_DIMENSION_HORZ ) ? AF_DIR_UP
-                                          : AF_DIR_RIGHT;
-
-    /*********************************************************************/
-    /*                                                                   */
-    /* We will begin by generating a sorted table of edges for the       */
-    /* current direction.  To do so, we simply scan each segment and try */
-    /* to find an edge in our table that corresponds to its position.    */
-    /*                                                                   */
-    /* If no edge is found, we create and insert a new edge in the       */
-    /* sorted table.  Otherwise, we simply add the segment to the edge's */
-    /* list which will be processed in the second step to compute the    */
-    /* edge's properties.                                                */
-    /*                                                                   */
-    /* Note that the edges table is sorted along the segment/edge        */
-    /* position.                                                         */
-    /*                                                                   */
-    /*********************************************************************/
-
-    edge_distance_threshold = FT_MulFix( hints->edge_distance_threshold,
-                                         scale );
-    if ( edge_distance_threshold > 64 / 4 )
-      edge_distance_threshold = 64 / 4;
-
-    edge_distance_threshold = FT_DivFix( edge_distance_threshold,
-                                         scale );
-
-    edge_limit = edges;
-    for ( seg = segments; seg < segment_limit; seg++ )
-    {
-      AF_Edge  found = 0;
-
-
-      /* look for an edge corresponding to the segment */
-      for ( edge = edges; edge < edge_limit; edge++ )
-      {
-        FT_Pos  dist;
-
-
-        dist = seg->pos - edge->fpos;
-        if ( dist < 0 )
-          dist = -dist;
-
-        if ( dist < edge_distance_threshold )
-        {
-          found = edge;
-          break;
-        }
-      }
-
-      if ( !found )
-      {
-        /* insert a new edge in the list and */
-        /* sort according to the position    */
-        while ( edge > edges && edge[-1].fpos > seg->pos )
-        {
-          edge[0] = edge[-1];
-          edge--;
-        }
-        edge_limit++;
-
-        /* clear all edge fields */
-        FT_MEM_ZERO( edge, sizeof ( *edge ) );
-
-        /* add the segment to the new edge's list */
-        edge->first    = seg;
-        edge->last     = seg;
-        edge->fpos     = seg->pos;
-        edge->opos     = edge->pos = FT_MulFix( seg->pos, scale );
-        seg->edge_next = seg;
-      }
-      else
-      {
-        /* if an edge was found, simply add the segment to the edge's */
-        /* list                                                       */
-        seg->edge_next        = edge->first;
-        edge->last->edge_next = seg;
-        edge->last            = seg;
-      }
-    }
-    axis->num_edges = (FT_Int)( edge_limit - edges );
-
-
-    /*********************************************************************/
-    /*                                                                   */
-    /* Good, we will now compute each edge's properties according to     */
-    /* segments found on its position.  Basically, these are:            */
-    /*                                                                   */
-    /*  - edge's main direction                                          */
-    /*  - stem edge, serif edge or both (which defaults to stem then)    */
-    /*  - rounded edge, straight or both (which defaults to straight)    */
-    /*  - link for edge                                                  */
-    /*                                                                   */
-    /*********************************************************************/
-
-    /* first of all, set the `edge' field in each segment -- this is */
-    /* required in order to compute edge links                       */
-
-    /* Note that I've tried to remove this loop, setting
-     * the "edge" field of each segment directly in the
-     * code above.  For some reason, it slows down execution
-     * speed -- on a Sun.
-     */
-    for ( edge = edges; edge < edge_limit; edge++ )
-    {
-      seg = edge->first;
-      if ( seg )
-        do
-        {
-          seg->edge = edge;
-          seg       = seg->edge_next;
-        }
-        while ( seg != edge->first );
-    }
-
-    /* now, compute each edge properties */
-    for ( edge = edges; edge < edge_limit; edge++ )
-    {
-      FT_Int  is_round    = 0;  /* does it contain round segments?    */
-      FT_Int  is_straight = 0;  /* does it contain straight segments? */
-      FT_Pos  ups         = 0;  /* number of upwards segments         */
-      FT_Pos  downs       = 0;  /* number of downwards segments       */
-
-
-      seg = edge->first;
-
-      do
-      {
-        FT_Bool  is_serif;
-
-
-        /* check for roundness of segment */
-        if ( seg->flags & AF_EDGE_ROUND )
-          is_round++;
-        else
-          is_straight++;
-
-        /* check for segment direction */
-        if ( seg->dir == up_dir )
-          ups   += seg->max_coord-seg->min_coord;
-        else
-          downs += seg->max_coord-seg->min_coord;
-
-        /* check for links -- if seg->serif is set, then seg->link must */
-        /* be ignored                                                   */
-        is_serif = (FT_Bool)( seg->serif && seg->serif->edge != edge );
-
-        if ( seg->link || is_serif )
-        {
-          AF_Edge     edge2;
-          AF_Segment  seg2;
-
-
-          edge2 = edge->link;
-          seg2  = seg->link;
-
-          if ( is_serif )
-          {
-            seg2  = seg->serif;
-            edge2 = edge->serif;
-          }
-
-          if ( edge2 )
-          {
-            FT_Pos  edge_delta;
-            FT_Pos  seg_delta;
-
-
-            edge_delta = edge->fpos - edge2->fpos;
-            if ( edge_delta < 0 )
-              edge_delta = -edge_delta;
-
-            seg_delta = seg->pos - seg2->pos;
-            if ( seg_delta < 0 )
-              seg_delta = -seg_delta;
-
-            if ( seg_delta < edge_delta )
-              edge2 = seg2->edge;
-          }
-          else
-            edge2 = seg2->edge;
-
-          if ( is_serif )
-          {
-            edge->serif   = edge2;
-            edge2->flags |= AF_EDGE_SERIF;
-          }
-          else
-            edge->link  = edge2;
-        }
-
-        seg = seg->edge_next;
-
-      } while ( seg != edge->first );
-
-      /* set the round/straight flags */
-      edge->flags = AF_EDGE_NORMAL;
-
-      if ( is_round > 0 && is_round >= is_straight )
-        edge->flags |= AF_EDGE_ROUND;
-
-      /* set the edge's main direction */
-      edge->dir = AF_DIR_NONE;
-
-      if ( ups > downs )
-        edge->dir = up_dir;
-
-      else if ( ups < downs )
-        edge->dir = -up_dir;
-
-      else if ( ups == downs )
-        edge->dir = 0;  /* both up and down! */
-
-      /* gets rid of serifs if link is set                */
-      /* XXX: This gets rid of many unpleasant artefacts! */
-      /*      Example: the `c' in cour.pfa at size 13     */
-
-      if ( edge->serif && edge->link )
-        edge->serif = 0;
-    }
-  }
-
-
-  FT_LOCAL_DEF( void )
-  af_latin_hints_detect_features( AF_GlyphHints  hints,
-                                  AF_Dimension   dim )
-  {
-    af_latin_hints_compute_segments( hints, dim );
-    af_latin_hints_link_segments   ( hints, dim );
-    af_latin_hints_compute_edges   ( hints, dim );
-  }
-
-
-  FT_LOCAL_DEF( void )
-  af_latin_hints_compute_blue_edges( AF_GlyphHints    hints,
-                                     AF_LatinMetrics  metrics )
-  {
-    AF_AxisHints  axis       = &hints->axis[ AF_DIMENSION_VERT ];
-    AF_Edge       edge       = axis->edges;
-    AF_Edge       edge_limit = edge + axis->num_edges;
-    AF_LatinAxis  latin      = &metrics->axis[ AF_DIMENSION_VERT ];
-    FT_Fixed      scale      = latin->scale;
-
-
-    /* compute which blue zones are active, i.e. have their scaled */
-    /* size < 3/4 pixels                                           */
-
-   /* for each horizontal edge search the blue zone which is closest */
-    for ( ; edge < edge_limit; edge++ )
-    {
-      FT_Int     bb;
-      AF_Width   best_blue = NULL;
-      FT_Pos     best_dist;  /* initial threshold */
-
-
-      /* compute the initial threshold as a fraction of the EM size */
-      best_dist = FT_MulFix( metrics->units_per_em / 40, scale );
-
-      if ( best_dist > 64 / 2 )
-        best_dist = 64 / 2;
-
-      for ( bb = 0; bb < AF_LATIN_BLUE_MAX; bb++ )
-      {
-        AF_LatinBlue  blue = latin->blues + bb;
-        FT_Bool       is_top_blue, is_major_dir;
-
-       /* skip inactive blue zones (i.e. those that are too small
-        */
-        if ( !(blue->flags & AF_LATIN_BLUE_ACTIVE) )
-          continue;
-
-        /* if it is a top zone, check for right edges -- if it is a bottom */
-        /* zone, check for left edges                                      */
-        /*                                                                 */
-        /* of course, that's for TrueType                                  */
-        is_top_blue  = (blue->flags & AF_LATIN_BLUE_TOP) != 0;
-        is_major_dir = FT_BOOL( edge->dir == axis->major_dir );
-
-        /* if it is a top zone, the edge must be against the major    */
-        /* direction; if it is a bottom zone, it must be in the major */
-        /* direction                                                  */
-        if ( is_top_blue ^ is_major_dir )
-        {
-          FT_Pos   dist;
-
-
-          /* first of all, compare it to the reference position */
-          dist = edge->fpos - blue->ref.org;
-          if ( dist < 0 )
-            dist = -dist;
-
-          dist = FT_MulFix( dist, scale );
-          if ( dist < best_dist )
-          {
-            best_dist = dist;
-            best_blue = & blue->ref;
-          }
-
-          /* now, compare it to the overshoot position if the edge is     */
-          /* rounded, and if the edge is over the reference position of a */
-          /* top zone, or under the reference position of a bottom zone   */
-          if ( edge->flags & AF_EDGE_ROUND && dist != 0 )
-          {
-            FT_Bool  is_under_ref = FT_BOOL( edge->fpos < blue->ref.org );
-
-
-            if ( is_top_blue ^ is_under_ref )
-            {
-              blue = latin->blues + bb;
-              dist = edge->fpos - blue->shoot.org;
-              if ( dist < 0 )
-                dist = -dist;
-
-              dist = FT_MulFix( dist, scale );
-              if ( dist < best_dist )
-              {
-                best_dist = dist;
-                best_blue = & blue->shoot;
-              }
-            }
-          }
-        }
-      }
-
-      if ( best_blue )
-        edge->blue_edge = best_blue;
-    }
-  }
-
-
-  static FT_Error
-  af_latin_hints_init( AF_GlyphHints    hints,
-                       FT_Outline*      outline,
-                       AF_LatinMetrics  metrics )
-  {
-    FT_Error        error;
-    FT_Render_Mode  mode;
-
-    error = af_glyph_hints_reset( hints, &metrics->scaler, outline );
-    if (error)
-      goto Exit;
-
-
-   /* compute flags depending on render mode, etc...
-    */
-
-    mode = metrics->scaler.render_mode;
-
-   /* we snap the width of vertical stems for the monochrome and
-    * horizontal LCD rendering targets only.
-    */
-    if ( mode == FT_RENDER_MODE_MONO || mode == FT_RENDER_MODE_LCD )
-      hints->other_flags |= AF_LATIN_HINTS_HORZ_SNAP;
-
-   /* we snap the width of horizontal stems for the monochrome and
-    * vertical LCD rendering targets only.
-    */
-    if ( mode == FT_RENDER_MODE_MONO || mode == FT_RENDER_MODE_LCD_V )
-      hints->other_flags |= AF_LATIN_HINTS_VERT_SNAP;
-
-   /* XXX
-    */
-    if ( mode != FT_RENDER_MODE_LIGHT )
-      hints->other_flags |= AF_LATIN_HINTS_STEM_ADJUST;
-
-    if ( mode == FT_RENDER_MODE_MONO )
-      hints->other_flags |= AF_LATIN_HINTS_MONO;
-
-   /* analyze glyph outline
-    */
-    if ( AF_HINTS_DO_HORIZONTAL(hints) )
-      af_latin_hints_detect_features( hints, AF_DIMENSION_HORZ );
-
-    if ( AF_HINTS_DO_VERTICAL(hints) )
-    {
-      af_latin_hints_detect_features( hints, AF_DIMENSION_VERT );
-      af_latin_hints_compute_blue_edges( hints, metrics );
-    }
-
- Exit:
-   return error;
-  }
-
- /***************************************************************************/
- /***************************************************************************/
- /*****                                                                 *****/
- /*****         L A T I N   G L Y P H   G R I D - F I T T I N G         *****/
- /*****                                                                 *****/
- /***************************************************************************/
- /***************************************************************************/
-
-  /* snap a given width in scaled coordinates to one of the */
-  /* current standard widths                                */
-  static FT_Pos
-  af_latin_snap_width( AF_Width  widths,
-                       FT_Int    count,
-                       FT_Pos    width )
-  {
-    int     n;
-    FT_Pos  best      = 64 + 32 + 2;
-    FT_Pos  reference = width;
-    FT_Pos  scaled;
-
-
-    for ( n = 0; n < count; n++ )
-    {
-      FT_Pos  w;
-      FT_Pos  dist;
-
-
-      w = widths[n].cur;
-      dist = width - w;
-      if ( dist < 0 )
-        dist = -dist;
-      if ( dist < best )
-      {
-        best      = dist;
-        reference = w;
-      }
-    }
-
-    scaled = FT_PIX_ROUND( reference );
-
-    if ( width >= reference )
-    {
-      if ( width < scaled + 48 )
-        width = reference;
-    }
-    else
-    {
-      if ( width > scaled - 48 )
-        width = reference;
-    }
-
-    return width;
-  }
-
-
-  /* compute the snapped width of a given stem */
-
-  static FT_Pos
-  af_latin_compute_stem_width( AF_GlyphHints  hints,
-                               AF_Dimension   dim,
-                               FT_Pos         width,
-                               AF_Edge_Flags  base_flags,
-                               AF_Edge_Flags  stem_flags )
-  {
-    AF_LatinMetrics  metrics  = (AF_LatinMetrics) hints->metrics;
-    AF_LatinAxis     axis     = & metrics->axis[ dim ];
-    FT_Pos           dist     = width;
-    FT_Int           sign     = 0;
-    FT_Int           vertical = AF_HINTS_DO_VERTICAL( hints );
-
-
-    if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) )
-      return width;
-
-    if ( dist < 0 )
-    {
-      dist = -width;
-      sign = 1;
-    }
-
-    if ( (  vertical && !AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) ||
-         ( !vertical && !AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) )
-    {
-      /* smooth hinting process: very lightly quantize the stem width */
-      /*                                                              */
-
-      /* leave the widths of serifs alone */
-
-      if ( ( stem_flags & AF_EDGE_SERIF ) && vertical && ( dist < 3 * 64 ) )
-        goto Done_Width;
-
-      else if ( ( base_flags & AF_EDGE_ROUND ) )
-      {
-        if ( dist < 80 )
-          dist = 64;
-      }
-      else if ( dist < 56 )
-        dist = 56;
-
-      if ( axis->width_count > 0 )
-      {
-        FT_Pos  delta;
-
-       /* compare to standard width
-        */
-        if ( axis->width_count > 0 )
-        {
-          delta = dist - axis->widths[0].cur;
-
-          if ( delta < 0 )
-            delta = -delta;
-
-          if ( delta < 40 )
-          {
-            dist = axis->widths[ 0 ].cur;
-            if ( dist < 48 )
-              dist = 48;
-
-            goto Done_Width;
-          }
-        }
-
-        if ( dist < 3 * 64 )
-        {
-          delta  = dist & 63;
-          dist  &= -64;
-
-          if ( delta < 10 )
-            dist += delta;
-
-          else if ( delta < 32 )
-            dist += 10;
-
-          else if ( delta < 54 )
-            dist += 54;
-
-          else
-            dist += delta;
-        }
-        else
-          dist = ( dist + 32 ) & ~63;
-      }
-    }
-    else
-    {
-      /* strong hinting process: snap the stem width to integer pixels */
-      /*                                                               */
-      dist = af_latin_snap_width( axis->widths, axis->width_count, dist );
-
-      if ( vertical )
-      {
-        /* in the case of vertical hinting, always round */
-        /* the stem heights to integer pixels            */
-        if ( dist >= 64 )
-          dist = ( dist + 16 ) & ~63;
-        else
-          dist = 64;
-      }
-      else
-      {
-        if ( AF_LATIN_HINTS_DO_MONO( hints ) )
-        {
-          /* monochrome horizontal hinting: snap widths to integer pixels */
-          /* with a different threshold                                   */
-          if ( dist < 64 )
-            dist = 64;
-          else
-            dist = ( dist + 32 ) & ~63;
-        }
-        else
-        {
-          /* for horizontal anti-aliased hinting, we adopt a more subtle */
-          /* approach: we strengthen small stems, round stems whose size */
-          /* is between 1 and 2 pixels to an integer, otherwise nothing  */
-          if ( dist < 48 )
-            dist = ( dist + 64 ) >> 1;
-
-          else if ( dist < 128 )
-            dist = ( dist + 22 ) & ~63;
-          else
-            /* round otherwise to prevent color fringes in LCD mode */
-            dist = ( dist + 32 ) & ~63;
-        }
-      }
-    }
-
-  Done_Width:
-    if ( sign )
-      dist = -dist;
-
-    return dist;
-  }
-
-
-
-  /* align one stem edge relative to the previous stem edge */
-  static void
-  af_latin_align_linked_edge( AF_GlyphHints  hints,
-                              AF_Dimension   dim,
-                              AF_Edge        base_edge,
-                              AF_Edge        stem_edge )
-  {
-    FT_Pos  dist = stem_edge->opos - base_edge->opos;
-
-    FT_Pos  fitted_width = af_latin_compute_stem_width( hints,
-                                                        dim,
-                                                        dist,
-                                                        base_edge->flags,
-                                                        stem_edge->flags );
-
-    stem_edge->pos = base_edge->pos + fitted_width;
-  }
-
-
-  static void
-  af_latin_align_serif_edge( AF_GlyphHints  hints,
-                             AF_Edge        base,
-                             AF_Edge        serif )
-  {
-    FT_UNUSED( hints );
-
-    serif->pos = base->pos + (serif->opos - base->opos);
-  }
-
-  /*************************************************************************/
-  /*************************************************************************/
-  /*************************************************************************/
-  /****                                                                 ****/
-  /****       E D G E   H I N T I N G                                   ****/
-  /****                                                                 ****/
-  /*************************************************************************/
-  /*************************************************************************/
-  /*************************************************************************/
-
-
-  FT_LOCAL_DEF( void )
-  af_latin_hint_edges( AF_GlyphHints   hints,
-                       AF_Dimension    dim )
-  {
-    AF_AxisHints  axis = & hints->axis[dim];
-    AF_Edge       edges = axis->edges;
-    AF_Edge       edge_limit = edges + axis->num_edges;
-    FT_Int        n_edges;
-    AF_Edge       edge;
-    AF_Edge       anchor = 0;
-    FT_Int        has_serifs = 0;
-
-
-    /* we begin by aligning all stems relative to the blue zone */
-    /* if needed -- that's only for horizontal edges            */
-    if ( dim == AF_DIMENSION_VERT )
-    {
-      for ( edge = edges; edge < edge_limit; edge++ )
-      {
-        AF_Width  blue;
-        AF_Edge   edge1, edge2;
-
-
-        if ( edge->flags & AF_EDGE_DONE )
-          continue;
-
-        blue  = edge->blue_edge;
-        edge1 = NULL;
-        edge2 = edge->link;
-
-        if ( blue )
-        {
-          edge1 = edge;
-        }
-        else if ( edge2 && edge2->blue_edge )
-        {
-          blue  = edge2->blue_edge;
-          edge1 = edge2;
-          edge2 = edge;
-        }
-
-        if ( !edge1 )
-          continue;
-
-        edge1->pos    = blue->fit;
-        edge1->flags |= AF_EDGE_DONE;
-
-        if ( edge2 && !edge2->blue_edge )
-        {
-          af_latin_align_linked_edge( hints, dim, edge1, edge2 );
-          edge2->flags |= AF_EDGE_DONE;
-        }
-
-        if ( !anchor )
-          anchor = edge;
-      }
-    }
-
-    /* now we will align all stem edges, trying to maintain the */
-    /* relative order of stems in the glyph                     */
-    for ( edge = edges; edge < edge_limit; edge++ )
-    {
-      AF_Edge  edge2;
-
-
-      if ( edge->flags & AF_EDGE_DONE )
-        continue;
-
-      /* skip all non-stem edges */
-      edge2 = edge->link;
-      if ( !edge2 )
-      {
-        has_serifs++;
-        continue;
-      }
-
-      /* now align the stem */
-
-      /* this should not happen, but it's better to be safe */
-      if ( edge2->blue_edge || edge2 < edge )
-      {
-        af_latin_align_linked_edge( hints, dim, edge2, edge );
-        edge->flags |= AF_EDGE_DONE;
-        continue;
-      }
-
-      if ( !anchor )
-      {
-        FT_Pos  org_len, org_center, cur_len;
-        FT_Pos  cur_pos1, error1, error2, u_off, d_off;
-
-
-        org_len = edge2->opos - edge->opos;
-        cur_len = af_latin_compute_stem_width( hints, dim, org_len,
-                                               edge->flags, edge2->flags );
-        if ( cur_len <= 64 )
-          u_off = d_off = 32;
-        else
-        {
-          u_off = 38;
-          d_off = 26;
-        }
-
-        if ( cur_len < 96 )
-        {
-          org_center = edge->opos + ( org_len >> 1 );
-
-          cur_pos1   = FT_PIX_ROUND( org_center );
-
-          error1 = org_center - ( cur_pos1 - u_off );
-          if ( error1 < 0 )
-            error1 = -error1;
-
-          error2 = org_center - ( cur_pos1 + d_off );
-          if ( error2 < 0 )
-            error2 = -error2;
-
-          if ( error1 < error2 )
-            cur_pos1 -= u_off;
-          else
-            cur_pos1 += d_off;
-
-          edge->pos  = cur_pos1 - cur_len / 2;
-          edge2->pos = cur_pos1 + cur_len / 2;
-
-        }
-        else
-          edge->pos = FT_PIX_ROUND( edge->opos );
-
-        anchor = edge;
-
-        edge->flags |= AF_EDGE_DONE;
-
-        af_latin_align_linked_edge( hints, dim, edge, edge2 );
-      }
-      else
-      {
-        FT_Pos  org_pos, org_len, org_center, cur_len;
-        FT_Pos  cur_pos1, cur_pos2, delta1, delta2;
-
-
-        org_pos    = anchor->pos + ( edge->opos - anchor->opos );
-        org_len    = edge2->opos - edge->opos;
-        org_center = org_pos + ( org_len >> 1 );
-
-        cur_len = af_latin_compute_stem_width( hints, dim, org_len,
-                                               edge->flags, edge2->flags  );
-
-        if ( cur_len < 96 )
-        {
-          FT_Pos  u_off, d_off;
-
-
-          cur_pos1 = FT_PIX_ROUND( org_center );
-
-          if (cur_len <= 64 )
-            u_off = d_off = 32;
-          else
-          {
-            u_off = 38;
-            d_off = 26;
-          }
-
-          delta1 = org_center - ( cur_pos1 - u_off );
-          if ( delta1 < 0 )
-            delta1 = -delta1;
-
-          delta2 = org_center - ( cur_pos1 + d_off );
-          if ( delta2 < 0 )
-            delta2 = -delta2;
-
-          if ( delta1 < delta2 )
-            cur_pos1 -= u_off;
-          else
-            cur_pos1 += d_off;
-
-          edge->pos  = cur_pos1 - cur_len / 2;
-          edge2->pos = cur_pos1 + cur_len / 2;
-        }
-        else
-        {
-          org_pos    = anchor->pos + ( edge->opos - anchor->opos );
-          org_len    = edge2->opos - edge->opos;
-          org_center = org_pos + ( org_len >> 1 );
-
-          cur_len    = af_latin_compute_stem_width( hints, dim, org_len,
-                                                    edge->flags, edge2->flags );
-
-          cur_pos1   = FT_PIX_ROUND( org_pos );
-          delta1     = ( cur_pos1 + ( cur_len >> 1 ) - org_center );
-          if ( delta1 < 0 )
-            delta1 = -delta1;
-
-          cur_pos2   = FT_PIX_ROUND( org_pos + org_len ) - cur_len;
-          delta2     = ( cur_pos2 + ( cur_len >> 1 ) - org_center );
-          if ( delta2 < 0 )
-            delta2 = -delta2;
-
-          edge->pos  = ( delta1 < delta2 ) ? cur_pos1 : cur_pos2;
-          edge2->pos = edge->pos + cur_len;
-        }
-
-        edge->flags  |= AF_EDGE_DONE;
-        edge2->flags |= AF_EDGE_DONE;
-
-        if ( edge > edges && edge->pos < edge[-1].pos )
-          edge->pos = edge[-1].pos;
-      }
-    }
-
-    /* make sure that lowercase m's maintain their symmetry */
-
-    /* In general, lowercase m's have six vertical edges if they are sans */
-    /* serif, or twelve if they are avec serif.  This implementation is   */
-    /* based on that assumption, and seems to work very well with most    */
-    /* faces.  However, if for a certain face this assumption is not      */
-    /* true, the m is just rendered like before.  In addition, any stem   */
-    /* correction will only be applied to symmetrical glyphs (even if the */
-    /* glyph is not an m), so the potential for unwanted distortion is    */
-    /* relatively low.                                                    */
-
-    /* We don't handle horizontal edges since we can't easily assure that */
-    /* the third (lowest) stem aligns with the base line; it might end up */
-    /* one pixel higher or lower.                                         */
-
-    n_edges = edge_limit - edges;
-    if ( dim == AF_DIMENSION_HORZ && ( n_edges == 6 || n_edges == 12 ) )
-    {
-      AF_Edge  edge1, edge2, edge3;
-      FT_Pos   dist1, dist2, span, delta;
-
-
-      if ( n_edges == 6 )
-      {
-        edge1 = edges;
-        edge2 = edges + 2;
-        edge3 = edges + 4;
-      }
-      else
-      {
-        edge1 = edges + 1;
-        edge2 = edges + 5;
-        edge3 = edges + 9;
-      }
-
-      dist1 = edge2->opos - edge1->opos;
-      dist2 = edge3->opos - edge2->opos;
-
-      span = dist1 - dist2;
-      if ( span < 0 )
-        span = -span;
-
-      if ( span < 8 )
-      {
-        delta = edge3->pos - ( 2 * edge2->pos - edge1->pos );
-        edge3->pos -= delta;
-        if ( edge3->link )
-          edge3->link->pos -= delta;
-
-        /* move the serifs along with the stem */
-        if ( n_edges == 12 )
-        {
-          ( edges + 8 )->pos -= delta;
-          ( edges + 11 )->pos -= delta;
-        }
-
-        edge3->flags |= AF_EDGE_DONE;
-        if ( edge3->link )
-          edge3->link->flags |= AF_EDGE_DONE;
-      }
-    }
-
-    if ( has_serifs || !anchor )
-    {
-     /* now hint the remaining edges (serifs and single) in order
-      * to complete our processing
-      */
-      for ( edge = edges; edge < edge_limit; edge++ )
-      {
-        if ( edge->flags & AF_EDGE_DONE )
-          continue;
-
-        if ( edge->serif )
-          af_latin_align_serif_edge( hints, edge->serif, edge );
-        else if ( !anchor )
-        {
-          edge->pos = FT_PIX_ROUND( edge->opos );
-          anchor    = edge;
-        }
-        else
-          edge->pos = anchor->pos +
-                      FT_PIX_ROUND( edge->opos - anchor->opos );
-
-        edge->flags |= AF_EDGE_DONE;
-
-        if ( edge > edges && edge->pos < edge[-1].pos )
-          edge->pos = edge[-1].pos;
-
-        if ( edge + 1 < edge_limit        &&
-             edge[1].flags & AF_EDGE_DONE &&
-             edge->pos > edge[1].pos      )
-          edge->pos = edge[1].pos;
-      }
-    }
-  }
-
-
-  static FT_Error
-  af_latin_hints_apply( AF_GlyphHints    hints,
-                        AF_LatinMetrics  metrics )
-  {
-    AF_Dimension  dim;
-
-    FT_UNUSED( metrics );
-
-    for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
-    {
-      if ( (dim == AF_DIMENSION_HORZ && AF_HINTS_DO_HORIZONTAL(hints)) ||
-           (dim == AF_DIMENSION_VERT && AF_HINTS_DO_VERTICAL(hints))   )
-      {
-        af_latin_hint_edges( hints, dim );
-        af_glyph_hints_align_edge_points( hints, dim );
-        af_glyph_hints_align_strong_points( hints, dim );
-        af_glyph_hints_align_weak_points( hints, dim );
-      }
-    }
-    return 0;
-  }
-
- /***************************************************************************/
- /***************************************************************************/
- /*****                                                                 *****/
- /*****      L A T I N   S C R I P T   C L A S S                        *****/
- /*****                                                                 *****/
- /***************************************************************************/
- /***************************************************************************/
-
-  static const AF_Script_UniRangeRec  af_latin_uniranges[] =
-  {
-    { 32, 127 },    /* XXX: TODO: Add new Unicode ranges here !! */
-    { 160, 255 },
-    { 0, 0 }
-  };
-
-  FT_LOCAL_DEF( const AF_ScriptClassRec )  af_latin_script_class =
-  {
-    AF_SCRIPT_LATIN,
-    af_latin_uniranges,
-
-    sizeof( AF_LatinMetricsRec ),
-    (AF_Script_InitMetricsFunc)  af_latin_metrics_init,
-    (AF_Script_ScaleMetricsFunc) af_latin_metrics_scale,
-    (AF_Script_DoneMetricsFunc)  NULL,
-
-    (AF_Script_InitHintsFunc)    af_latin_hints_init,
-    (AF_Script_ApplyHintsFunc)   af_latin_hints_apply
-  };
-
+#include "aflatin.h"

+

+ /***************************************************************************/

+ /***************************************************************************/

+ /*****                                                                 *****/

+ /*****       L A T I N   G L O B A L   M E T R I C S                   *****/

+ /*****                                                                 *****/

+ /***************************************************************************/

+ /***************************************************************************/

+

+  static void

+  af_latin_metrics_init_widths( AF_LatinMetrics  metrics,

+                                FT_Face          face )

+  {

+    /* scan the array of segments in each direction */

+    AF_GlyphHintsRec  hints[1];

+

+    af_glyph_hints_init( hints, face->memory );

+

+    metrics->axis[ AF_DIMENSION_HORZ ].width_count = 0;

+    metrics->axis[ AF_DIMENSION_VERT ].width_count = 0;

+

+    /* For now, compute the standard width and height from the `o' */

+    {

+      FT_Error      error;

+      FT_UInt       glyph_index;

+      AF_Dimension  dim;

+      AF_ScalerRec  scaler[1];

+

+

+      glyph_index = FT_Get_Char_Index( face, 'o' );

+      if ( glyph_index == 0 )

+        goto Exit;

+

+      error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );

+      if ( error || face->glyph->outline.n_points <= 0 )

+        goto Exit;

+

+      scaler->x_scale     = scaler->y_scale = 0x10000L;

+      scaler->x_delta     = scaler->y_delta = 0;

+      scaler->face        = face;

+      scaler->render_mode = 0;

+      scaler->flags       = 0;

+

+      error = af_glyph_hints_reset( hints, scaler,

+                                    (AF_ScriptMetrics) metrics,

+                                    &face->glyph->outline );

+      if ( error )

+        goto Exit;

+

+      for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )

+      {

+        AF_LatinAxis  axis    = & metrics->axis[ dim ];

+        AF_AxisHints  axhints = & hints->axis[ dim ];

+        AF_Segment    seg, limit, link;

+        FT_UInt       num_widths = 0;

+        FT_Pos        edge_distance_threshold = 32000;

+

+        af_latin_hints_compute_segments( hints, dim );

+        af_latin_hints_link_segments   ( hints, dim );

+

+        seg   = axhints->segments;

+        limit = seg + axhints->num_segments;

+

+        for ( ; seg < limit; seg++ )

+        {

+          link = seg->link;

+          /* we only consider stem segments there! */

+          if ( link && link->link == seg && link > seg )

+          {

+            FT_Pos  dist;

+

+

+            dist = seg->pos - link->pos;

+            if ( dist < 0 )

+              dist = -dist;

+

+            if ( num_widths < AF_LATIN_MAX_WIDTHS )

+              axis->widths[ num_widths++ ].org = dist;

+          }

+        }

+

+        af_sort_widths( num_widths, axis->widths );

+        axis->width_count = num_widths;

+

+        /* we will now try to find the smallest width */

+        if ( num_widths > 0 && axis->widths[0].org < edge_distance_threshold )

+          edge_distance_threshold = axis->widths[0].org;

+

+        /* Now, compute the edge distance threshold as a fraction of the */

+        /* smallest width in the font. Set it in `hinter->glyph' too!    */

+        if ( edge_distance_threshold == 32000 )

+          edge_distance_threshold = 50;

+

+        /* let's try 20% */

+        axis->edge_distance_threshold = edge_distance_threshold / 5;

+      }

+    }

+

+  Exit:

+    af_glyph_hints_done( hints );

+  }

+

+

+

+#define AF_LATIN_MAX_TEST_CHARACTERS  12

+

+

+  static  const char* const  af_latin_blue_chars[ AF_LATIN_MAX_BLUES ] =

+  {

+    "THEZOCQS",

+    "HEZLOCUS",

+    "fijkdbh",

+    "xzroesc",

+    "xzroesc",

+    "pqgjy"

+  };

+

+

+  static void

+  af_latin_metrics_init_blues( AF_LatinMetrics  metrics,

+                               FT_Face          face )

+  {

+    FT_Pos        flats [ AF_LATIN_MAX_TEST_CHARACTERS ];

+    FT_Pos        rounds[ AF_LATIN_MAX_TEST_CHARACTERS ];

+    FT_Int        num_flats;

+    FT_Int        num_rounds;

+    FT_Int        bb;

+    AF_LatinBlue  blue;

+    FT_Error      error;

+    AF_LatinAxis  axis  = &metrics->axis[ AF_DIMENSION_VERT ];

+    FT_GlyphSlot  glyph = face->glyph;

+

+    /* we compute the blues simply by loading each character from the    */

+    /* 'af_latin_blue_chars[blues]' string, then compute its top-most or */

+    /* bottom-most points (depending on `AF_IS_TOP_BLUE')                */

+

+    AF_LOG(( "blue zones computation\n" ));

+    AF_LOG(( "------------------------------------------------\n" ));

+

+    for ( bb = 0; bb < AF_LATIN_BLUE_MAX; bb++ )

+    {

+      const char*  p     = af_latin_blue_chars[bb];

+      const char*  limit = p + AF_LATIN_MAX_TEST_CHARACTERS;

+      FT_Pos*      blue_ref;

+      FT_Pos*      blue_shoot;

+

+      AF_LOG(( "blue %3d: ", bb ));

+

+      num_flats  = 0;

+      num_rounds = 0;

+

+      for ( ; p < limit && *p; p++ )

+      {

+        FT_UInt     glyph_index;

+        FT_Vector*  extremum;

+        FT_Vector*  points;

+        FT_Vector*  point_limit;

+        FT_Vector*  point;

+        FT_Bool     round;

+

+

+        AF_LOG(( "'%c'", *p ));

+

+        /* load the character in the face -- skip unknown or empty ones */

+        glyph_index = FT_Get_Char_Index( face, (FT_UInt)*p );

+        if ( glyph_index == 0 )

+          continue;

+

+        error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );

+        if ( error || glyph->outline.n_points <= 0 )

+          continue;

+

+        /* now compute min or max point indices and coordinates */

+        points      = glyph->outline.points;

+        point_limit = points + glyph->outline.n_points;

+        point       = points;

+        extremum    = point;

+        point++;

+

+        if ( AF_LATIN_IS_TOP_BLUE( bb ) )

+        {

+          for ( ; point < point_limit; point++ )

+            if ( point->y > extremum->y )

+              extremum = point;

+        }

+        else

+        {

+          for ( ; point < point_limit; point++ )

+            if ( point->y < extremum->y )

+              extremum = point;

+        }

+

+        AF_LOG(( "%5d", (int)extremum->y ));

+

+        /* now, check whether the point belongs to a straight or round  */

+        /* segment; we first need to find in which contour the extremum */

+        /* lies, then see its previous and next points                  */

+        {

+          FT_Int  idx = (FT_Int)( extremum - points );

+          FT_Int  n;

+          FT_Int  first, last, prev, next, end;

+          FT_Pos  dist;

+

+

+          last  = -1;

+          first = 0;

+

+          for ( n = 0; n < glyph->outline.n_contours; n++ )

+          {

+            end = glyph->outline.contours[n];

+            if ( end >= idx )

+            {

+              last = end;

+              break;

+            }

+            first = end + 1;

+          }

+

+          /* XXX: should never happen! */

+          if ( last < 0 )

+            continue;

+

+          /* now look for the previous and next points that are not on the */

+          /* same Y coordinate.  Threshold the `closeness'...              */

+

+          prev = idx;

+          next = prev;

+

+          do

+          {

+            if ( prev > first )

+              prev--;

+            else

+              prev = last;

+

+            dist = points[prev].y - extremum->y;

+            if ( dist < -5 || dist > 5 )

+              break;

+

+          } while ( prev != idx );

+

+          do

+          {

+            if ( next < last )

+              next++;

+            else

+              next = first;

+

+            dist = points[next].y - extremum->y;

+            if ( dist < -5 || dist > 5 )

+              break;

+

+          } while ( next != idx );

+

+          /* now, set the `round' flag depending on the segment's kind */

+          round = FT_BOOL(

+            FT_CURVE_TAG( glyph->outline.tags[prev] ) != FT_CURVE_TAG_ON ||

+            FT_CURVE_TAG( glyph->outline.tags[next] ) != FT_CURVE_TAG_ON );

+

+          AF_LOG(( "%c ", round ? 'r' : 'f' ));

+        }

+

+        if ( round )

+          rounds[num_rounds++] = extremum->y;

+        else

+          flats[num_flats++] = extremum->y;

+      }

+

+      AF_LOG(( "\n" ));

+

+      if ( num_flats == 0 && num_rounds == 0 )

+      {

+       /* we couldn't find a single glyph to compute this blue zone,

+        * we will simply ignore it then

+        */

+        AF_LOG(( "empty !!\n" ));

+        continue;

+      }

+

+      /* we have computed the contents of the `rounds' and `flats' tables, */

+      /* now determine the reference and overshoot position of the blue -- */

+      /* we simply take the median value after a simple sort               */

+      af_sort_pos( num_rounds, rounds );

+      af_sort_pos( num_flats,  flats );

+

+      blue       = & axis->blues[ axis->blue_count ];

+      blue_ref   = & blue->ref.org;

+      blue_shoot = & blue->shoot.org;

+

+      axis->blue_count ++;

+

+      if ( num_flats == 0 )

+      {

+        *blue_ref    =

+        *blue_shoot = rounds[num_rounds / 2];

+      }

+      else if ( num_rounds == 0 )

+      {

+        *blue_ref   =

+        *blue_shoot = flats[num_flats / 2];

+      }

+      else

+      {

+        *blue_ref   = flats[num_flats / 2];

+        *blue_shoot = rounds[num_rounds / 2];

+      }

+

+      /* there are sometimes problems: if the overshoot position of top     */

+      /* zones is under its reference position, or the opposite for bottom  */

+      /* zones.  We must thus check everything there and correct the errors */

+      if ( *blue_shoot != *blue_ref )

+      {

+        FT_Pos   ref      = *blue_ref;

+        FT_Pos   shoot    = *blue_shoot;

+        FT_Bool  over_ref = FT_BOOL( shoot > ref );

+

+

+        if ( AF_LATIN_IS_TOP_BLUE( bb ) ^ over_ref )

+          *blue_shoot = *blue_ref = ( shoot + ref ) / 2;

+      }

+

+      blue->flags = 0;

+      if ( AF_LATIN_IS_TOP_BLUE(bb) )

+        blue->flags |= AF_LATIN_BLUE_TOP;

+

+      AF_LOG(( "-- ref = %ld, shoot = %ld\n", *blue_ref, *blue_shoot ));

+    }

+

+    return;

+  }

+

+

+  FT_LOCAL_DEF( FT_Error )

+  af_latin_metrics_init( AF_LatinMetrics  metrics,

+                         FT_Face          face )

+  {

+    FT_Error      error;

+    FT_CharMap    oldmap = face->charmap;

+

+    /* do we have a Unicode charmap in there? */

+    error = FT_Select_Charmap( face, FT_ENCODING_UNICODE );

+    if ( error ) goto Exit;

+

+    metrics->units_per_em = face->units_per_EM;

+

+    af_latin_metrics_init_widths( metrics, face );

+    af_latin_metrics_init_blues( metrics, face );

+

+  Exit:

+    FT_Set_Charmap( face, oldmap );

+    return error;

+  }

+

+

+  static void

+  af_latin_metrics_scale_dim( AF_LatinMetrics   metrics,

+                              AF_Scaler         scaler,

+                              AF_Dimension      dim )

+  {

+    FT_Fixed      scale;

+    FT_Pos        delta;

+    AF_LatinAxis  axis;

+    FT_UInt       nn;

+

+    if ( dim == AF_DIMENSION_HORZ )

+    {

+      scale = scaler->x_scale;

+      delta = scaler->x_delta;

+    }

+    else

+    {

+      scale = scaler->y_scale;

+      delta = scaler->y_delta;

+    }

+

+    axis = & metrics->axis[ dim ];

+

+    if ( axis->org_scale == scale && axis->org_delta == delta )

+      return;

+

+    axis->org_scale = scale;

+    axis->org_delta = delta;

+

+   /* XXX: TODO: Correct Y and X scale according to Chester rules

+    */

+    axis->scale = scale;

+    axis->delta = delta;

+

+    if ( dim == AF_DIMENSION_HORZ )

+    {

+      metrics->scaler.x_scale = scale;

+      metrics->scaler.x_delta = delta;

+    }

+    else

+    {

+      metrics->scaler.y_scale = scale;

+      metrics->scaler.y_delta = delta;

+    }

+

+   /* scale the standard widths

+    */

+    for ( nn = 0; nn < axis->width_count; nn++ )

+    {

+      AF_Width  width = axis->widths + nn;

+

+      width->cur = FT_MulFix( width->org, scale );

+      width->fit = width->cur;

+    }

+

+    if ( dim == AF_DIMENSION_VERT )

+    {

+     /* scale the blue zones

+      */

+      for ( nn = 0; nn < axis->blue_count; nn++ )

+      {

+        AF_LatinBlue  blue  = & axis->blues[nn];

+        FT_Pos        dist;

+

+        blue->ref.cur = FT_MulFix( blue->ref.org, scale ) + delta;

+        blue->ref.fit = blue->ref.cur;

+

+        blue->shoot.cur = FT_MulFix( blue->shoot.org, scale ) + delta;

+        blue->shoot.fit = blue->shoot.cur;

+

+       /* a blue zone is only active when it is less than 3/4 pixels tall

+        */

+        dist = FT_MulFix( blue->ref.org - blue->shoot.org, scale );

+        if ( dist >= 48 || dist <= -48 )

+          blue->flags |= ~AF_LATIN_BLUE_ACTIVE;

+      }

+    }

+  }

+

+

+  FT_LOCAL_DEF( void )

+  af_latin_metrics_scale( AF_LatinMetrics  metrics,

+                          AF_Scaler        scaler )

+  {

+    metrics->scaler = scaler[0];

+

+    af_latin_metrics_scale_dim( metrics, scaler, AF_DIMENSION_HORZ );

+    af_latin_metrics_scale_dim( metrics, scaler, AF_DIMENSION_VERT );

+  }

+

+

+ /***************************************************************************/

+ /***************************************************************************/

+ /*****                                                                 *****/

+ /*****            L A T I N   G L Y P H   A N A L Y S I S              *****/

+ /*****                                                                 *****/

+ /***************************************************************************/

+ /***************************************************************************/

+

+  FT_LOCAL_DEF( void )

+  af_latin_hints_compute_segments( AF_GlyphHints  hints,

+                                   AF_Dimension   dim )

+  {

+    AF_AxisHints  axis = &hints->axis[dim];

+    AF_Segment    segments = axis->segments;

+    AF_Segment    segment       =  segments;

+    FT_Int        num_segments  =  0;

+    AF_Point*     contour       =  hints->contours;

+    AF_Point*     contour_limit =  contour + hints->num_contours;

+    AF_Direction  major_dir, segment_dir;

+

+#ifdef AF_HINT_METRICS

+    AF_Point    min_point     =  0;

+    AF_Point    max_point     =  0;

+    FT_Pos      min_coord     =  32000;

+    FT_Pos      max_coord     = -32000;

+#endif

+

+    major_dir   = ABS( axis->major_dir );

+    segment_dir = major_dir;

+

+    /* set up (u,v) in each point */

+    if ( dim == AF_DIMENSION_HORZ )

+    {

+      AF_Point  point = hints->points;

+      AF_Point  limit = point + hints->num_points;

+

+      for ( ; point < limit; point++ )

+      {

+        point->u = point->fx;

+        point->v = point->fy;

+      }

+    }

+    else

+    {

+      AF_Point  point = hints->points;

+      AF_Point  limit = point + hints->num_points;

+

+      for ( ; point < limit; point++ )

+      {

+        point->u = point->fy;

+        point->v = point->fx;

+      }

+    }

+

+

+    /* do each contour separately */

+    for ( ; contour < contour_limit; contour++ )

+    {

+      AF_Point  point   =  contour[0];

+      AF_Point  last    =  point->prev;

+      int       on_edge =  0;

+      FT_Pos    min_pos =  32000;  /* minimum segment pos != min_coord */

+      FT_Pos    max_pos = -32000;  /* maximum segment pos != max_coord */

+      FT_Bool   passed;

+

+

+#ifdef AF_HINT_METRICS

+      if ( point->u < min_coord )

+      {

+        min_coord = point->u;

+        min_point = point;

+      }

+      if ( point->u > max_coord )

+      {

+        max_coord = point->u;

+        max_point = point;

+      }

+#endif

+

+      if ( point == last )  /* skip singletons -- just in case */

+        continue;

+

+      if ( ABS( last->out_dir )  == major_dir &&

+           ABS( point->out_dir ) == major_dir )

+      {

+        /* we are already on an edge, try to locate its start */

+        last = point;

+

+        for (;;)

+        {

+          point = point->prev;

+          if ( ABS( point->out_dir ) != major_dir )

+          {

+            point = point->next;

+            break;

+          }

+          if ( point == last )

+            break;

+        }

+      }

+

+      last   = point;

+      passed = 0;

+

+      for (;;)

+      {

+        FT_Pos  u, v;

+

+

+        if ( on_edge )

+        {

+          u = point->u;

+          if ( u < min_pos )

+            min_pos = u;

+          if ( u > max_pos )

+            max_pos = u;

+

+          if ( point->out_dir != segment_dir || point == last )

+          {

+            /* we are just leaving an edge; record a new segment! */

+            segment->last = point;

+            segment->pos  = ( min_pos + max_pos ) >> 1;

+

+            /* a segment is round if either its first or last point */

+            /* is a control point                                   */

+            if ( ( segment->first->flags | point->flags ) &

+                   AF_FLAG_CONTROL                        )

+              segment->flags |= AF_EDGE_ROUND;

+

+            /* compute segment size */

+            min_pos = max_pos = point->v;

+

+            v = segment->first->v;

+            if ( v < min_pos )

+              min_pos = v;

+            if ( v > max_pos )

+              max_pos = v;

+

+            segment->min_coord = min_pos;

+            segment->max_coord = max_pos;

+

+            on_edge = 0;

+            num_segments++;

+            segment++;

+            /* fallthrough */

+          }

+        }

+

+        /* now exit if we are at the start/end point */

+        if ( point == last )

+        {

+          if ( passed )

+            break;

+          passed = 1;

+        }

+

+        if ( !on_edge && ABS( point->out_dir ) == major_dir )

+        {

+          /* this is the start of a new segment! */

+          segment_dir = point->out_dir;

+

+          /* clear all segment fields */

+          FT_ZERO( segment );

+

+          segment->dir      = segment_dir;

+          segment->flags    = AF_EDGE_NORMAL;

+          min_pos = max_pos = point->u;

+          segment->first    = point;

+          segment->last     = point;

+          segment->contour  = contour;

+          segment->score    = 32000;

+          segment->link     = NULL;

+          on_edge           = 1;

+

+#ifdef AF_HINT_METRICS

+          if ( point == max_point )

+            max_point = 0;

+

+          if ( point == min_point )

+            min_point = 0;

+#endif

+        }

+

+        point = point->next;

+      }

+

+    } /* contours */

+

+#ifdef AF_HINT_METRICS

+    /* we need to ensure that there are edges on the left-most and  */

+    /* right-most points of the glyph in order to hint the metrics; */

+    /* we do this by inserting fake segments when needed            */

+    if ( dim == AF_DIMENSION_HORZ )

+    {

+      AF_Point  point       = hints->points;

+      AF_Point  point_limit = point + hints->num_points;

+

+      FT_Pos    min_pos =  32000;

+      FT_Pos    max_pos = -32000;

+

+

+      min_point = 0;

+      max_point = 0;

+

+      /* compute minimum and maximum points */

+      for ( ; point < point_limit; point++ )

+      {

+        FT_Pos  x = point->fx;

+

+

+        if ( x < min_pos )

+        {

+          min_pos   = x;

+          min_point = point;

+        }

+        if ( x > max_pos )

+        {

+          max_pos   = x;

+          max_point = point;

+        }

+      }

+

+      /* insert minimum segment */

+      if ( min_point )

+      {

+        /* clear all segment fields */

+        FT_ZERO( segment );

+

+        segment->dir   = segment_dir;

+        segment->flags = AF_EDGE_NORMAL;

+        segment->first = min_point;

+        segment->last  = min_point;

+        segment->pos   = min_pos;

+        segment->score = 32000;

+        segment->link  = NULL;

+

+        num_segments++;

+        segment++;

+      }

+

+      /* insert maximum segment */

+      if ( max_point )

+      {

+        /* clear all segment fields */

+        FT_ZERO( segment );

+

+        segment->dir   = segment_dir;

+        segment->flags = AF_EDGE_NORMAL;

+        segment->first = max_point;

+        segment->last  = max_point;

+        segment->pos   = max_pos;

+        segment->score = 32000;

+        segment->link  = NULL;

+

+        num_segments++;

+        segment++;

+      }

+    }

+#endif /* AF_HINT_METRICS */

+

+    axis->num_segments = num_segments;

+  }

+

+

+  FT_LOCAL_DEF( void )

+  af_latin_hints_link_segments( AF_GlyphHints  hints,

+                                AF_Dimension   dim )

+  {

+    AF_AxisHints  axis          = &hints->axis[dim];

+    AF_Segment    segments      = axis->segments;

+    AF_Segment    segment_limit = segments + axis->num_segments;

+    AF_Direction  major_dir     = axis->major_dir;

+    AF_Segment    seg1, seg2;

+

+    /* now compare each segment to the others */

+    for ( seg1 = segments; seg1 < segment_limit; seg1++ )

+    {

+      /* the fake segments are introduced to hint the metrics -- */

+      /* we must never link them to anything                     */

+      if ( seg1->first == seg1->last || seg1->dir != major_dir )

+        continue;

+

+      for ( seg2 = segments; seg2 < segment_limit; seg2++ )

+        if ( seg2 != seg1 && seg1->dir + seg2->dir == 0 )

+        {

+          FT_Pos  pos1 = seg1->pos;

+          FT_Pos  pos2 = seg2->pos;

+          FT_Pos  dist = pos2 - pos1;

+

+

+          if ( dist < 0 )

+            continue;

+

+          {

+            FT_Pos  min = seg1->min_coord;

+            FT_Pos  max = seg1->max_coord;

+            FT_Pos  len, score;

+

+

+            if ( min < seg2->min_coord )

+              min = seg2->min_coord;

+

+            if ( max > seg2->max_coord )

+              max = seg2->max_coord;

+

+            len = max - min;

+            if ( len >= 8 )

+            {

+              score = dist + 3000 / len;

+

+              if ( score < seg1->score )

+              {

+                seg1->score = score;

+                seg1->link  = seg2;

+              }

+

+              if ( score < seg2->score )

+              {

+                seg2->score = score;

+                seg2->link  = seg1;

+              }

+            }

+          }

+        }

+    }

+

+    /* now, compute the `serif' segments */

+    for ( seg1 = segments; seg1 < segment_limit; seg1++ )

+    {

+      seg2 = seg1->link;

+

+      if ( seg2 )

+      {

+        seg2->num_linked++;

+        if ( seg2->link != seg1 )

+        {

+          seg1->link  = 0;

+          seg1->serif = seg2->link;

+        }

+      }

+    }

+  }

+

+

+  FT_LOCAL_DEF( void )

+  af_latin_hints_compute_edges( AF_GlyphHints  hints,

+                                AF_Dimension   dim )

+  {

+    AF_AxisHints  axis = &hints->axis[dim];

+    AF_Edge       edges = axis->edges;

+    AF_Edge       edge, edge_limit;

+

+    AF_Segment    segments = axis->segments;

+    AF_Segment    segment_limit = segments + axis->num_segments;

+    AF_Segment    seg;

+

+    AF_Direction  up_dir;

+    FT_Fixed      scale;

+    FT_Pos        edge_distance_threshold;

+

+

+    scale = ( dim == AF_DIMENSION_HORZ ) ? hints->x_scale

+                                         : hints->y_scale;

+

+    up_dir = ( dim == AF_DIMENSION_HORZ ) ? AF_DIR_UP

+                                          : AF_DIR_RIGHT;

+

+    /*********************************************************************/

+    /*                                                                   */

+    /* We will begin by generating a sorted table of edges for the       */

+    /* current direction.  To do so, we simply scan each segment and try */

+    /* to find an edge in our table that corresponds to its position.    */

+    /*                                                                   */

+    /* If no edge is found, we create and insert a new edge in the       */

+    /* sorted table.  Otherwise, we simply add the segment to the edge's */

+    /* list which will be processed in the second step to compute the    */

+    /* edge's properties.                                                */

+    /*                                                                   */

+    /* Note that the edges table is sorted along the segment/edge        */

+    /* position.                                                         */

+    /*                                                                   */

+    /*********************************************************************/

+

+    edge_distance_threshold = FT_MulFix( hints->edge_distance_threshold,

+                                         scale );

+    if ( edge_distance_threshold > 64 / 4 )

+      edge_distance_threshold = 64 / 4;

+

+    edge_distance_threshold = FT_DivFix( edge_distance_threshold,

+                                         scale );

+

+    edge_limit = edges;

+    for ( seg = segments; seg < segment_limit; seg++ )

+    {

+      AF_Edge  found = 0;

+

+

+      /* look for an edge corresponding to the segment */

+      for ( edge = edges; edge < edge_limit; edge++ )

+      {

+        FT_Pos  dist;

+

+

+        dist = seg->pos - edge->fpos;

+        if ( dist < 0 )

+          dist = -dist;

+

+        if ( dist < edge_distance_threshold )

+        {

+          found = edge;

+          break;

+        }

+      }

+

+      if ( !found )

+      {

+        /* insert a new edge in the list and */

+        /* sort according to the position    */

+        while ( edge > edges && edge[-1].fpos > seg->pos )

+        {

+          edge[0] = edge[-1];

+          edge--;

+        }

+        edge_limit++;

+

+        /* clear all edge fields */

+        FT_ZERO( edge );

+

+        /* add the segment to the new edge's list */

+        edge->first    = seg;

+        edge->last     = seg;

+        edge->fpos     = seg->pos;

+        edge->opos     = edge->pos = FT_MulFix( seg->pos, scale );

+        seg->edge_next = seg;

+      }

+      else

+      {

+        /* if an edge was found, simply add the segment to the edge's */

+        /* list                                                       */

+        seg->edge_next        = edge->first;

+        edge->last->edge_next = seg;

+        edge->last            = seg;

+      }

+    }

+    axis->num_edges = (FT_Int)( edge_limit - edges );

+

+

+    /*********************************************************************/

+    /*                                                                   */

+    /* Good, we will now compute each edge's properties according to     */

+    /* segments found on its position.  Basically, these are:            */

+    /*                                                                   */

+    /*  - edge's main direction                                          */

+    /*  - stem edge, serif edge or both (which defaults to stem then)    */

+    /*  - rounded edge, straight or both (which defaults to straight)    */

+    /*  - link for edge                                                  */

+    /*                                                                   */

+    /*********************************************************************/

+

+    /* first of all, set the `edge' field in each segment -- this is */

+    /* required in order to compute edge links                       */

+

+    /* Note that I've tried to remove this loop, setting

+     * the "edge" field of each segment directly in the

+     * code above.  For some reason, it slows down execution

+     * speed -- on a Sun.

+     */

+    for ( edge = edges; edge < edge_limit; edge++ )

+    {

+      seg = edge->first;

+      if ( seg )

+        do

+        {

+          seg->edge = edge;

+          seg       = seg->edge_next;

+        }

+        while ( seg != edge->first );

+    }

+

+    /* now, compute each edge properties */

+    for ( edge = edges; edge < edge_limit; edge++ )

+    {

+      FT_Int  is_round    = 0;  /* does it contain round segments?    */

+      FT_Int  is_straight = 0;  /* does it contain straight segments? */

+      FT_Pos  ups         = 0;  /* number of upwards segments         */

+      FT_Pos  downs       = 0;  /* number of downwards segments       */

+

+

+      seg = edge->first;

+

+      do

+      {

+        FT_Bool  is_serif;

+

+

+        /* check for roundness of segment */

+        if ( seg->flags & AF_EDGE_ROUND )

+          is_round++;

+        else

+          is_straight++;

+

+        /* check for segment direction */

+        if ( seg->dir == up_dir )

+          ups   += seg->max_coord-seg->min_coord;

+        else

+          downs += seg->max_coord-seg->min_coord;

+

+        /* check for links -- if seg->serif is set, then seg->link must */

+        /* be ignored                                                   */

+        is_serif = (FT_Bool)( seg->serif && seg->serif->edge != edge );

+

+        if ( seg->link || is_serif )

+        {

+          AF_Edge     edge2;

+          AF_Segment  seg2;

+

+

+          edge2 = edge->link;

+          seg2  = seg->link;

+

+          if ( is_serif )

+          {

+            seg2  = seg->serif;

+            edge2 = edge->serif;

+          }

+

+          if ( edge2 )

+          {

+            FT_Pos  edge_delta;

+            FT_Pos  seg_delta;

+

+

+            edge_delta = edge->fpos - edge2->fpos;

+            if ( edge_delta < 0 )

+              edge_delta = -edge_delta;

+

+            seg_delta = seg->pos - seg2->pos;

+            if ( seg_delta < 0 )

+              seg_delta = -seg_delta;

+

+            if ( seg_delta < edge_delta )

+              edge2 = seg2->edge;

+          }

+          else

+            edge2 = seg2->edge;

+

+          if ( is_serif )

+          {

+            edge->serif   = edge2;

+            edge2->flags |= AF_EDGE_SERIF;

+          }

+          else

+            edge->link  = edge2;

+        }

+

+        seg = seg->edge_next;

+

+      } while ( seg != edge->first );

+

+      /* set the round/straight flags */

+      edge->flags = AF_EDGE_NORMAL;

+

+      if ( is_round > 0 && is_round >= is_straight )

+        edge->flags |= AF_EDGE_ROUND;

+

+      /* set the edge's main direction */

+      edge->dir = AF_DIR_NONE;

+

+      if ( ups > downs )

+        edge->dir = up_dir;

+

+      else if ( ups < downs )

+        edge->dir = -up_dir;

+

+      else if ( ups == downs )

+        edge->dir = 0;  /* both up and down! */

+

+      /* gets rid of serifs if link is set                */

+      /* XXX: This gets rid of many unpleasant artefacts! */

+      /*      Example: the `c' in cour.pfa at size 13     */

+

+      if ( edge->serif && edge->link )

+        edge->serif = 0;

+    }

+  }

+

+

+  FT_LOCAL_DEF( void )

+  af_latin_hints_detect_features( AF_GlyphHints  hints,

+                                  AF_Dimension   dim )

+  {

+    af_latin_hints_compute_segments( hints, dim );

+    af_latin_hints_link_segments   ( hints, dim );

+    af_latin_hints_compute_edges   ( hints, dim );

+  }

+

+

+  FT_LOCAL_DEF( void )

+  af_latin_hints_compute_blue_edges( AF_GlyphHints    hints,

+                                     AF_LatinMetrics  metrics )

+  {

+    AF_AxisHints  axis       = &hints->axis[ AF_DIMENSION_VERT ];

+    AF_Edge       edge       = axis->edges;

+    AF_Edge       edge_limit = edge + axis->num_edges;

+    AF_LatinAxis  latin      = &metrics->axis[ AF_DIMENSION_VERT ];

+    FT_Fixed      scale      = latin->scale;

+

+

+    /* compute which blue zones are active, i.e. have their scaled */

+    /* size < 3/4 pixels                                           */

+

+   /* for each horizontal edge search the blue zone which is closest */

+    for ( ; edge < edge_limit; edge++ )

+    {

+      FT_Int     bb;

+      AF_Width   best_blue = NULL;

+      FT_Pos     best_dist;  /* initial threshold */

+

+

+      /* compute the initial threshold as a fraction of the EM size */

+      best_dist = FT_MulFix( metrics->units_per_em / 40, scale );

+

+      if ( best_dist > 64 / 2 )

+        best_dist = 64 / 2;

+

+      for ( bb = 0; bb < AF_LATIN_BLUE_MAX; bb++ )

+      {

+        AF_LatinBlue  blue = latin->blues + bb;

+        FT_Bool       is_top_blue, is_major_dir;

+

+       /* skip inactive blue zones (i.e. those that are too small

+        */

+        if ( !(blue->flags & AF_LATIN_BLUE_ACTIVE) )

+          continue;

+

+        /* if it is a top zone, check for right edges -- if it is a bottom */

+        /* zone, check for left edges                                      */

+        /*                                                                 */

+        /* of course, that's for TrueType                                  */

+        is_top_blue  = (blue->flags & AF_LATIN_BLUE_TOP) != 0;

+        is_major_dir = FT_BOOL( edge->dir == axis->major_dir );

+

+        /* if it is a top zone, the edge must be against the major    */

+        /* direction; if it is a bottom zone, it must be in the major */

+        /* direction                                                  */

+        if ( is_top_blue ^ is_major_dir )

+        {

+          FT_Pos   dist;

+

+

+          /* first of all, compare it to the reference position */

+          dist = edge->fpos - blue->ref.org;

+          if ( dist < 0 )

+            dist = -dist;

+

+          dist = FT_MulFix( dist, scale );

+          if ( dist < best_dist )

+          {

+            best_dist = dist;

+            best_blue = & blue->ref;

+          }

+

+          /* now, compare it to the overshoot position if the edge is     */

+          /* rounded, and if the edge is over the reference position of a */

+          /* top zone, or under the reference position of a bottom zone   */

+          if ( edge->flags & AF_EDGE_ROUND && dist != 0 )

+          {

+            FT_Bool  is_under_ref = FT_BOOL( edge->fpos < blue->ref.org );

+

+

+            if ( is_top_blue ^ is_under_ref )

+            {

+              blue = latin->blues + bb;

+              dist = edge->fpos - blue->shoot.org;

+              if ( dist < 0 )

+                dist = -dist;

+

+              dist = FT_MulFix( dist, scale );

+              if ( dist < best_dist )

+              {

+                best_dist = dist;

+                best_blue = & blue->shoot;

+              }

+            }

+          }

+        }

+      }

+

+      if ( best_blue )

+        edge->blue_edge = best_blue;

+    }

+  }

+

+

+  static FT_Error

+  af_latin_hints_init( AF_GlyphHints    hints,

+                       FT_Outline*      outline,

+                       AF_LatinMetrics  metrics )

+  {

+    FT_Error        error;

+    FT_Render_Mode  mode;

+

+    error = af_glyph_hints_reset( hints, &metrics->scaler,

+                                  (AF_ScriptMetrics) metrics,

+                                  outline );

+    if (error)

+      goto Exit;

+

+

+   /* compute flags depending on render mode, etc...

+    */

+

+    mode = metrics->scaler.render_mode;

+

+   /* we snap the width of vertical stems for the monochrome and

+    * horizontal LCD rendering targets only.

+    */

+    if ( mode == FT_RENDER_MODE_MONO || mode == FT_RENDER_MODE_LCD )

+      hints->other_flags |= AF_LATIN_HINTS_HORZ_SNAP;

+

+   /* we snap the width of horizontal stems for the monochrome and

+    * vertical LCD rendering targets only.

+    */

+    if ( mode == FT_RENDER_MODE_MONO || mode == FT_RENDER_MODE_LCD_V )

+      hints->other_flags |= AF_LATIN_HINTS_VERT_SNAP;

+

+   /* XXX

+    */

+    if ( mode != FT_RENDER_MODE_LIGHT )

+      hints->other_flags |= AF_LATIN_HINTS_STEM_ADJUST;

+

+    if ( mode == FT_RENDER_MODE_MONO )

+      hints->other_flags |= AF_LATIN_HINTS_MONO;

+

+   /* analyze glyph outline

+    */

+    if ( AF_HINTS_DO_HORIZONTAL(hints) )

+      af_latin_hints_detect_features( hints, AF_DIMENSION_HORZ );

+

+    if ( AF_HINTS_DO_VERTICAL(hints) )

+    {

+      af_latin_hints_detect_features( hints, AF_DIMENSION_VERT );

+      af_latin_hints_compute_blue_edges( hints, metrics );

+    }

+

+ Exit:

+   return error;

+  }

+

+ /***************************************************************************/

+ /***************************************************************************/

+ /*****                                                                 *****/

+ /*****         L A T I N   G L Y P H   G R I D - F I T T I N G         *****/

+ /*****                                                                 *****/

+ /***************************************************************************/

+ /***************************************************************************/

+

+  /* snap a given width in scaled coordinates to one of the */

+  /* current standard widths                                */

+  static FT_Pos

+  af_latin_snap_width( AF_Width  widths,

+                       FT_Int    count,

+                       FT_Pos    width )

+  {

+    int     n;

+    FT_Pos  best      = 64 + 32 + 2;

+    FT_Pos  reference = width;

+    FT_Pos  scaled;

+

+

+    for ( n = 0; n < count; n++ )

+    {

+      FT_Pos  w;

+      FT_Pos  dist;

+

+

+      w = widths[n].cur;

+      dist = width - w;

+      if ( dist < 0 )

+        dist = -dist;

+      if ( dist < best )

+      {

+        best      = dist;

+        reference = w;

+      }

+    }

+

+    scaled = FT_PIX_ROUND( reference );

+

+    if ( width >= reference )

+    {

+      if ( width < scaled + 48 )

+        width = reference;

+    }

+    else

+    {

+      if ( width > scaled - 48 )

+        width = reference;

+    }

+

+    return width;

+  }

+

+

+  /* compute the snapped width of a given stem */

+

+  static FT_Pos

+  af_latin_compute_stem_width( AF_GlyphHints  hints,

+                               AF_Dimension   dim,

+                               FT_Pos         width,

+                               AF_Edge_Flags  base_flags,

+                               AF_Edge_Flags  stem_flags )

+  {

+    AF_LatinMetrics  metrics  = (AF_LatinMetrics) hints->metrics;

+    AF_LatinAxis     axis     = & metrics->axis[ dim ];

+    FT_Pos           dist     = width;

+    FT_Int           sign     = 0;

+    FT_Int           vertical = AF_HINTS_DO_VERTICAL( hints );

+

+

+    if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) )

+      return width;

+

+    if ( dist < 0 )

+    {

+      dist = -width;

+      sign = 1;

+    }

+

+    if ( (  vertical && !AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) ||

+         ( !vertical && !AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) )

+    {

+      /* smooth hinting process: very lightly quantize the stem width */

+      /*                                                              */

+

+      /* leave the widths of serifs alone */

+

+      if ( ( stem_flags & AF_EDGE_SERIF ) && vertical && ( dist < 3 * 64 ) )

+        goto Done_Width;

+

+      else if ( ( base_flags & AF_EDGE_ROUND ) )

+      {

+        if ( dist < 80 )

+          dist = 64;

+      }

+      else if ( dist < 56 )

+        dist = 56;

+

+      if ( axis->width_count > 0 )

+      {

+        FT_Pos  delta;

+

+       /* compare to standard width

+        */

+        if ( axis->width_count > 0 )

+        {

+          delta = dist - axis->widths[0].cur;

+

+          if ( delta < 0 )

+            delta = -delta;

+

+          if ( delta < 40 )

+          {

+            dist = axis->widths[ 0 ].cur;

+            if ( dist < 48 )

+              dist = 48;

+

+            goto Done_Width;

+          }

+        }

+

+        if ( dist < 3 * 64 )

+        {

+          delta  = dist & 63;

+          dist  &= -64;

+

+          if ( delta < 10 )

+            dist += delta;

+

+          else if ( delta < 32 )

+            dist += 10;

+

+          else if ( delta < 54 )

+            dist += 54;

+

+          else

+            dist += delta;

+        }

+        else

+          dist = ( dist + 32 ) & ~63;

+      }

+    }

+    else

+    {

+      /* strong hinting process: snap the stem width to integer pixels */

+      /*                                                               */

+      dist = af_latin_snap_width( axis->widths, axis->width_count, dist );

+

+      if ( vertical )

+      {

+        /* in the case of vertical hinting, always round */

+        /* the stem heights to integer pixels            */

+        if ( dist >= 64 )

+          dist = ( dist + 16 ) & ~63;

+        else

+          dist = 64;

+      }

+      else

+      {

+        if ( AF_LATIN_HINTS_DO_MONO( hints ) )

+        {

+          /* monochrome horizontal hinting: snap widths to integer pixels */

+          /* with a different threshold                                   */

+          if ( dist < 64 )

+            dist = 64;

+          else

+            dist = ( dist + 32 ) & ~63;

+        }

+        else

+        {

+          /* for horizontal anti-aliased hinting, we adopt a more subtle */

+          /* approach: we strengthen small stems, round stems whose size */

+          /* is between 1 and 2 pixels to an integer, otherwise nothing  */

+          if ( dist < 48 )

+            dist = ( dist + 64 ) >> 1;

+

+          else if ( dist < 128 )

+            dist = ( dist + 22 ) & ~63;

+          else

+            /* round otherwise to prevent color fringes in LCD mode */

+            dist = ( dist + 32 ) & ~63;

+        }

+      }

+    }

+

+  Done_Width:

+    if ( sign )

+      dist = -dist;

+

+    return dist;

+  }

+

+

+

+  /* align one stem edge relative to the previous stem edge */

+  static void

+  af_latin_align_linked_edge( AF_GlyphHints  hints,

+                              AF_Dimension   dim,

+                              AF_Edge        base_edge,

+                              AF_Edge        stem_edge )

+  {

+    FT_Pos  dist = stem_edge->opos - base_edge->opos;

+

+    FT_Pos  fitted_width = af_latin_compute_stem_width( hints,

+                                                        dim,

+                                                        dist,

+                                                        base_edge->flags,

+                                                        stem_edge->flags );

+

+    stem_edge->pos = base_edge->pos + fitted_width;

+  }

+

+

+  static void

+  af_latin_align_serif_edge( AF_GlyphHints  hints,

+                             AF_Edge        base,

+                             AF_Edge        serif )

+  {

+    FT_UNUSED( hints );

+

+    serif->pos = base->pos + (serif->opos - base->opos);

+  }

+

+  /*************************************************************************/

+  /*************************************************************************/

+  /*************************************************************************/

+  /****                                                                 ****/

+  /****       E D G E   H I N T I N G                                   ****/

+  /****                                                                 ****/

+  /*************************************************************************/

+  /*************************************************************************/

+  /*************************************************************************/

+

+

+  FT_LOCAL_DEF( void )

+  af_latin_hint_edges( AF_GlyphHints   hints,

+                       AF_Dimension    dim )

+  {

+    AF_AxisHints  axis = & hints->axis[dim];

+    AF_Edge       edges = axis->edges;

+    AF_Edge       edge_limit = edges + axis->num_edges;

+    FT_Int        n_edges;

+    AF_Edge       edge;

+    AF_Edge       anchor = 0;

+    FT_Int        has_serifs = 0;

+

+

+    /* we begin by aligning all stems relative to the blue zone */

+    /* if needed -- that's only for horizontal edges            */

+    if ( dim == AF_DIMENSION_VERT )

+    {

+      for ( edge = edges; edge < edge_limit; edge++ )

+      {

+        AF_Width  blue;

+        AF_Edge   edge1, edge2;

+

+

+        if ( edge->flags & AF_EDGE_DONE )

+          continue;

+

+        blue  = edge->blue_edge;

+        edge1 = NULL;

+        edge2 = edge->link;

+

+        if ( blue )

+        {

+          edge1 = edge;

+        }

+        else if ( edge2 && edge2->blue_edge )

+        {

+          blue  = edge2->blue_edge;

+          edge1 = edge2;

+          edge2 = edge;

+        }

+

+        if ( !edge1 )

+          continue;

+

+        edge1->pos    = blue->fit;

+        edge1->flags |= AF_EDGE_DONE;

+

+        if ( edge2 && !edge2->blue_edge )

+        {

+          af_latin_align_linked_edge( hints, dim, edge1, edge2 );

+          edge2->flags |= AF_EDGE_DONE;

+        }

+

+        if ( !anchor )

+          anchor = edge;

+      }

+    }

+

+    /* now we will align all stem edges, trying to maintain the */

+    /* relative order of stems in the glyph                     */

+    for ( edge = edges; edge < edge_limit; edge++ )

+    {

+      AF_Edge  edge2;

+

+

+      if ( edge->flags & AF_EDGE_DONE )

+        continue;

+

+      /* skip all non-stem edges */

+      edge2 = edge->link;

+      if ( !edge2 )

+      {

+        has_serifs++;

+        continue;

+      }

+

+      /* now align the stem */

+

+      /* this should not happen, but it's better to be safe */

+      if ( edge2->blue_edge || edge2 < edge )

+      {

+        af_latin_align_linked_edge( hints, dim, edge2, edge );

+        edge->flags |= AF_EDGE_DONE;

+        continue;

+      }

+

+      if ( !anchor )

+      {

+        FT_Pos  org_len, org_center, cur_len;

+        FT_Pos  cur_pos1, error1, error2, u_off, d_off;

+

+

+        org_len = edge2->opos - edge->opos;

+        cur_len = af_latin_compute_stem_width( hints, dim, org_len,

+                                               edge->flags, edge2->flags );

+        if ( cur_len <= 64 )

+          u_off = d_off = 32;

+        else

+        {

+          u_off = 38;

+          d_off = 26;

+        }

+

+        if ( cur_len < 96 )

+        {

+          org_center = edge->opos + ( org_len >> 1 );

+

+          cur_pos1   = FT_PIX_ROUND( org_center );

+

+          error1 = org_center - ( cur_pos1 - u_off );

+          if ( error1 < 0 )

+            error1 = -error1;

+

+          error2 = org_center - ( cur_pos1 + d_off );

+          if ( error2 < 0 )

+            error2 = -error2;

+

+          if ( error1 < error2 )

+            cur_pos1 -= u_off;

+          else

+            cur_pos1 += d_off;

+

+          edge->pos  = cur_pos1 - cur_len / 2;

+          edge2->pos = cur_pos1 + cur_len / 2;

+

+        }

+        else

+          edge->pos = FT_PIX_ROUND( edge->opos );

+

+        anchor = edge;

+

+        edge->flags |= AF_EDGE_DONE;

+

+        af_latin_align_linked_edge( hints, dim, edge, edge2 );

+      }

+      else

+      {

+        FT_Pos  org_pos, org_len, org_center, cur_len;

+        FT_Pos  cur_pos1, cur_pos2, delta1, delta2;

+

+

+        org_pos    = anchor->pos + ( edge->opos - anchor->opos );

+        org_len    = edge2->opos - edge->opos;

+        org_center = org_pos + ( org_len >> 1 );

+

+        cur_len = af_latin_compute_stem_width( hints, dim, org_len,

+                                               edge->flags, edge2->flags  );

+

+        if ( cur_len < 96 )

+        {

+          FT_Pos  u_off, d_off;

+

+

+          cur_pos1 = FT_PIX_ROUND( org_center );

+

+          if (cur_len <= 64 )

+            u_off = d_off = 32;

+          else

+          {

+            u_off = 38;

+            d_off = 26;

+          }

+

+          delta1 = org_center - ( cur_pos1 - u_off );

+          if ( delta1 < 0 )

+            delta1 = -delta1;

+

+          delta2 = org_center - ( cur_pos1 + d_off );

+          if ( delta2 < 0 )

+            delta2 = -delta2;

+

+          if ( delta1 < delta2 )

+            cur_pos1 -= u_off;

+          else

+            cur_pos1 += d_off;

+

+          edge->pos  = cur_pos1 - cur_len / 2;

+          edge2->pos = cur_pos1 + cur_len / 2;

+        }

+        else

+        {

+          org_pos    = anchor->pos + ( edge->opos - anchor->opos );

+          org_len    = edge2->opos - edge->opos;

+          org_center = org_pos + ( org_len >> 1 );

+

+          cur_len    = af_latin_compute_stem_width( hints, dim, org_len,

+                                                    edge->flags, edge2->flags );

+

+          cur_pos1   = FT_PIX_ROUND( org_pos );

+          delta1     = ( cur_pos1 + ( cur_len >> 1 ) - org_center );

+          if ( delta1 < 0 )

+            delta1 = -delta1;

+

+          cur_pos2   = FT_PIX_ROUND( org_pos + org_len ) - cur_len;

+          delta2     = ( cur_pos2 + ( cur_len >> 1 ) - org_center );

+          if ( delta2 < 0 )

+            delta2 = -delta2;

+

+          edge->pos  = ( delta1 < delta2 ) ? cur_pos1 : cur_pos2;

+          edge2->pos = edge->pos + cur_len;

+        }

+

+        edge->flags  |= AF_EDGE_DONE;

+        edge2->flags |= AF_EDGE_DONE;

+

+        if ( edge > edges && edge->pos < edge[-1].pos )

+          edge->pos = edge[-1].pos;

+      }

+    }

+

+    /* make sure that lowercase m's maintain their symmetry */

+

+    /* In general, lowercase m's have six vertical edges if they are sans */

+    /* serif, or twelve if they are avec serif.  This implementation is   */

+    /* based on that assumption, and seems to work very well with most    */

+    /* faces.  However, if for a certain face this assumption is not      */

+    /* true, the m is just rendered like before.  In addition, any stem   */

+    /* correction will only be applied to symmetrical glyphs (even if the */

+    /* glyph is not an m), so the potential for unwanted distortion is    */

+    /* relatively low.                                                    */

+

+    /* We don't handle horizontal edges since we can't easily assure that */

+    /* the third (lowest) stem aligns with the base line; it might end up */

+    /* one pixel higher or lower.                                         */

+

+    n_edges = edge_limit - edges;

+    if ( dim == AF_DIMENSION_HORZ && ( n_edges == 6 || n_edges == 12 ) )

+    {

+      AF_Edge  edge1, edge2, edge3;

+      FT_Pos   dist1, dist2, span, delta;

+

+

+      if ( n_edges == 6 )

+      {

+        edge1 = edges;

+        edge2 = edges + 2;

+        edge3 = edges + 4;

+      }

+      else

+      {

+        edge1 = edges + 1;

+        edge2 = edges + 5;

+        edge3 = edges + 9;

+      }

+

+      dist1 = edge2->opos - edge1->opos;

+      dist2 = edge3->opos - edge2->opos;

+

+      span = dist1 - dist2;

+      if ( span < 0 )

+        span = -span;

+

+      if ( span < 8 )

+      {

+        delta = edge3->pos - ( 2 * edge2->pos - edge1->pos );

+        edge3->pos -= delta;

+        if ( edge3->link )

+          edge3->link->pos -= delta;

+

+        /* move the serifs along with the stem */

+        if ( n_edges == 12 )

+        {

+          ( edges + 8 )->pos -= delta;

+          ( edges + 11 )->pos -= delta;

+        }

+

+        edge3->flags |= AF_EDGE_DONE;

+        if ( edge3->link )

+          edge3->link->flags |= AF_EDGE_DONE;

+      }

+    }

+

+    if ( has_serifs || !anchor )

+    {

+     /* now hint the remaining edges (serifs and single) in order

+      * to complete our processing

+      */

+      for ( edge = edges; edge < edge_limit; edge++ )

+      {

+        if ( edge->flags & AF_EDGE_DONE )

+          continue;

+

+        if ( edge->serif )

+          af_latin_align_serif_edge( hints, edge->serif, edge );

+        else if ( !anchor )

+        {

+          edge->pos = FT_PIX_ROUND( edge->opos );

+          anchor    = edge;

+        }

+        else

+          edge->pos = anchor->pos +

+                      FT_PIX_ROUND( edge->opos - anchor->opos );

+

+        edge->flags |= AF_EDGE_DONE;

+

+        if ( edge > edges && edge->pos < edge[-1].pos )

+          edge->pos = edge[-1].pos;

+

+        if ( edge + 1 < edge_limit        &&

+             edge[1].flags & AF_EDGE_DONE &&

+             edge->pos > edge[1].pos      )

+          edge->pos = edge[1].pos;

+      }

+    }

+  }

+

+

+  static FT_Error

+  af_latin_hints_apply( AF_GlyphHints    hints,

+                        FT_Outline*      outline,

+                        AF_LatinMetrics  metrics )

+  {

+    AF_Dimension  dim;

+

+    FT_UNUSED( metrics );

+

+    for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )

+    {

+      if ( (dim == AF_DIMENSION_HORZ && AF_HINTS_DO_HORIZONTAL(hints)) ||

+           (dim == AF_DIMENSION_VERT && AF_HINTS_DO_VERTICAL(hints))   )

+      {

+        af_latin_hint_edges( hints, dim );

+        af_glyph_hints_align_edge_points( hints, dim );

+        af_glyph_hints_align_strong_points( hints, dim );

+        af_glyph_hints_align_weak_points( hints, dim );

+      }

+    }

+    af_glyph_hints_save( hints, outline );

+

+    return 0;

+  }

+

+ /***************************************************************************/

+ /***************************************************************************/

+ /*****                                                                 *****/

+ /*****      L A T I N   S C R I P T   C L A S S                        *****/

+ /*****                                                                 *****/

+ /***************************************************************************/

+ /***************************************************************************/

+

+  static const AF_Script_UniRangeRec  af_latin_uniranges[] =

+  {

+    { 32, 127 },    /* XXX: TODO: Add new Unicode ranges here !! */

+    { 160, 255 },

+    { 0, 0 }

+  };

+

+  FT_LOCAL_DEF( const AF_ScriptClassRec )  af_latin_script_class =

+  {

+    AF_SCRIPT_LATIN,

+    af_latin_uniranges,

+

+    sizeof( AF_LatinMetricsRec ),

+    (AF_Script_InitMetricsFunc)  af_latin_metrics_init,

+    (AF_Script_ScaleMetricsFunc) af_latin_metrics_scale,

+    (AF_Script_DoneMetricsFunc)  NULL,

+

+    (AF_Script_InitHintsFunc)    af_latin_hints_init,

+    (AF_Script_ApplyHintsFunc)   af_latin_hints_apply

+  };

+

diff --git a/src/autofit/afloader.c b/src/autofit/afloader.c
index f51a6cf2b..023b251b4 100644
--- a/src/autofit/afloader.c
+++ b/src/autofit/afloader.c
@@ -1,431 +1,438 @@
-#include "afloader.h"
-#include "afhints.h"
-#include "afglobal.h"
-#include "aflatin.h"
-
-  FT_LOCAL_DEF( FT_Error )
-  af_loader_init( AF_Loader  loader,
-                  FT_Memory  memory )
-  {
-    FT_Error  error;
-
-    FT_ZERO( loader );
-
-    af_glyph_hints_init( &loader->hints, memory );
-
-    error = FT_GlyphLoader_New( memory, &loader->gloader );
-    if ( !error )
-    {
-      error = FT_GlyphLoader_CreateExtra( loader->gloader );
-      if ( error )
-      {
-        FT_GlyphLoader_Done( loader->gloader );
-        loader->gloader = NULL;
-      }
-    }
-    return error;
-  }
-
-
-  FT_LOCAL_DEF( FT_Error )
-  af_loader_reset( AF_Loader   loader,
-                   FT_Face     face )
-  {
-    FT_Error   error = 0;
-
-    loader->face    = face;
-    loader->gloader = face->glyph->internal->loader;
-    loader->globals = (AF_FaceGlobals) face->autohint.data;
-
-    if ( loader->globals == NULL )
-    {
-      error = af_face_globals_new( face, &loader->globals );
-      if ( !error )
-      {
-        face->autohint.data      = (FT_Pointer) loader->globals;
-        face->autohint.finalizer = (FT_Generic_Finalizer) af_face_globals_free;
-      }
-    }
-    return error;
-  }
-
-
-  FT_LOCAL_DEF( void )
-  af_loader_done( AF_Loader   loader )
-  {
-    loader->face    = NULL;
-    loader->globals = NULL;
-
-    FT_GlyphLoader_Done( loader->gloader );
-    loader->gloader = NULL;
-  }
-
-
-  static FT_Error
-  af_loader_load_g( AF_Loader  loader,
-                    AF_Scaler  scaler,
-                    FT_UInt    glyph_index,
-                    FT_Int32   load_flags,
-                    FT_UInt    depth )
-  {
-    FT_Error          error    = 0;
-    FT_Face           face     = loader->face;
-    AF_FaceGlobals    globals  = loader->globals;
-    FT_GlyphLoader    gloader  = loader->gloader;
-    AF_ScriptMetrics  metrics  = loader->metrics;
-    AF_GlyphHints     hints    = &loader->hints;
-    FT_GlyphSlot      slot     = face->glyph;
-    FT_Slot_Internal  internal = slot->internal;
-
-    error = FT_Load_Glyph( face, glyph_index, load_flags );
-    if ( error )
-      goto Exit;
-
-    loader->transformed = internal->glyph_transformed;
-    if ( loader->transformed )
-    {
-      FT_Matrix  inverse;
-
-      loader->trans_matrix = internal->glyph_matrix;
-      loader->trans_delta  = internal->glyph_delta;
-
-      inverse = loader->trans_matrix;
-      FT_Matrix_Invert( &inverse );
-      FT_Vector_Transform( &loader->trans_delta, &inverse );
-    }
-
-    /* set linear metrics */
-    slot->linearHoriAdvance = slot->metrics.horiAdvance;
-    slot->linearVertAdvance = slot->metrics.vertAdvance;
-
-    switch ( slot->format )
-    {
-      case FT_GLYPH_FORMAT_OUTLINE:
-       /* translate the loaded glyph when an internal transform
-        * is needed
-        */
-        if ( loader->transformed )
-        {
-          FT_Vector*  point = slot->outline.points;
-          FT_Vector*  limit = point + slot->outline.n_points;
-
-          for ( ; point < limit; point++ )
-          {
-            point->x += loader->trans_delta.x;
-            point->y += loader->trans_delta.y;
-          }
-        }
-
-        /* copy the outline points in the loader's current               */
-        /* extra points which is used to keep original glyph coordinates */
-        error = FT_GlyphLoader_CheckPoints( gloader,
-                                            slot->outline.n_points + 2,
-                                            slot->outline.n_contours );
-        if ( error )
-          goto Exit;
-
-        FT_ARRAY_COPY( gloader->current.extra_points,
-                       slot->outline.points,
-                       slot->outline.n_points );
-
-        FT_ARRAY_COPY( gloader->current.outline.contours,
-                       slot->outline.contours,
-                       slot->outline.n_contours );
-
-        FT_ARRAY_COPY( gloader->current.outline.tags,
-                       slot->outline.tags,
-                       slot->outline.n_points );
-
-        gloader->current.outline.n_points   = slot->outline.n_points;
-        gloader->current.outline.n_contours = slot->outline.n_contours;
-
-        /* compute original phantom points */
-        loader->pp1.x = hints->x_delta;
-        loader->pp1.y = hints->y_delta;
-        loader->pp2.x = FT_MulFix( slot->metrics.horiAdvance,
-                                   hints->x_scale ) + hints->x_delta;
-        loader->pp2.y = hints->y_delta;
-
-        /* be sure to check for spacing glyphs */
-        if ( slot->outline.n_points == 0 )
-          goto Hint_Metrics;
-
-        /* now load the slot image into the auto-outline and run the */
-        /* automatic hinting process                                 */
-        error = metrics->clazz->script_hints_init( hints,
-                                                   &gloader->current.outline,
-                                                   metrics );
-        if ( error )
-          goto Exit;
-
-        /* apply the hints */
-        metrics->clazz->script_hints_apply( hints,
-                                            &gloader->current.outline,
-                                            metrics );
-        /* we now need to hint the metrics according to the change in */
-        /* width/positioning that occured during the hinting process  */
-        {
-          FT_Pos        old_advance, old_rsb, old_lsb, new_lsb;
-          AF_AxisHints  axis  = &hints->axis[ AF_DIMENSION_HORZ ];
-          AF_Edge       edge1 = axis->edges;    /* leftmost edge  */
-          AF_Edge       edge2 = edge1 + axis->num_edges - 1; /* rightmost edge */
-
-
-          old_advance = loader->pp2.x;
-          old_rsb     = old_advance - edge2->opos;
-          old_lsb     = edge1->opos;
-          new_lsb     = edge1->pos;
-
-          loader->pp1.x = FT_PIX_ROUND( new_lsb    - old_lsb );
-          loader->pp2.x = FT_PIX_ROUND( edge2->pos + old_rsb );
-
-#if 0
-          /* try to fix certain bad advance computations */
-          if ( loader->pp2.x + loader->pp1.x == edge2->pos && old_rsb > 4 )
-            loader->pp2.x += 64;
-#endif
-        }
-
-        /* good, we simply add the glyph to our loader's base */
-        FT_GlyphLoader_Add( gloader );
-        break;
-
-    case FT_GLYPH_FORMAT_COMPOSITE:
-      {
-        FT_UInt      nn, num_subglyphs = slot->num_subglyphs;
-        FT_UInt      num_base_subgs, start_point;
-        FT_SubGlyph  subglyph;
-
-
-        start_point = gloader->base.outline.n_points;
-
-        /* first of all, copy the subglyph descriptors in the glyph loader */
-        error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs );
-        if ( error )
-          goto Exit;
-
-        FT_ARRAY_COPY( gloader->current.subglyphs,
-                       slot->subglyphs,
-                       num_subglyphs );
-
-        gloader->current.num_subglyphs = num_subglyphs;
-        num_base_subgs = gloader->base.num_subglyphs;
-
-        /* now, read each subglyph independently */
-        for ( nn = 0; nn < num_subglyphs; nn++ )
-        {
-          FT_Vector  pp1, pp2;
-          FT_Pos     x, y;
-          FT_UInt    num_points, num_new_points, num_base_points;
-
-
-          /* gloader.current.subglyphs can change during glyph loading due */
-          /* to re-allocation -- we must recompute the current subglyph on */
-          /* each iteration                                                */
-          subglyph = gloader->base.subglyphs + num_base_subgs + nn;
-
-          pp1 = loader->pp1;
-          pp2 = loader->pp2;
-
-          num_base_points = gloader->base.outline.n_points;
-
-          error = af_loader_load_g( loader, scaler, subglyph->index,
-                                    load_flags, depth + 1 );
-          if ( error )
-            goto Exit;
-
-          /* recompute subglyph pointer */
-          subglyph = gloader->base.subglyphs + num_base_subgs + nn;
-
-          if ( subglyph->flags & FT_SUBGLYPH_FLAG_USE_MY_METRICS )
-          {
-            pp1 = loader->pp1;
-            pp2 = loader->pp2;
-          }
-          else
-          {
-            loader->pp1 = pp1;
-            loader->pp2 = pp2;
-          }
-
-          num_points     = gloader->base.outline.n_points;
-          num_new_points = num_points - num_base_points;
-
-          /* now perform the transform required for this subglyph */
-
-          if ( subglyph->flags & ( FT_SUBGLYPH_FLAG_SCALE    |
-                                   FT_SUBGLYPH_FLAG_XY_SCALE |
-                                   FT_SUBGLYPH_FLAG_2X2      ) )
-          {
-            FT_Vector*  cur   = gloader->base.outline.points +
-                                num_base_points;
-            FT_Vector*  org   = gloader->base.extra_points +
-                                num_base_points;
-            FT_Vector*  limit = cur + num_new_points;
-
-
-            for ( ; cur < limit; cur++, org++ )
-            {
-              FT_Vector_Transform( cur, &subglyph->transform );
-              FT_Vector_Transform( org, &subglyph->transform );
-            }
-          }
-
-          /* apply offset */
-
-          if ( !( subglyph->flags & FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ) )
-          {
-            FT_Int      k = subglyph->arg1;
-            FT_UInt     l = subglyph->arg2;
-            FT_Vector*  p1;
-            FT_Vector*  p2;
-
-
-            if ( start_point + k >= num_base_points         ||
-                               l >= (FT_UInt)num_new_points )
-            {
-              error = FT_Err_Invalid_Composite;
-              goto Exit;
-            }
-
-            l += num_base_points;
-
-            /* for now, only use the current point coordinates;    */
-            /* we may consider another approach in the near future */
-            p1 = gloader->base.outline.points + start_point + k;
-            p2 = gloader->base.outline.points + start_point + l;
-
-            x = p1->x - p2->x;
-            y = p1->y - p2->y;
-          }
-          else
-          {
-            x = FT_MulFix( subglyph->arg1, hints->x_scale ) + hints->x_delta;
-            y = FT_MulFix( subglyph->arg2, hints->y_scale ) + hints->y_delta;
-
-            x = FT_PIX_ROUND(x);
-            y = FT_PIX_ROUND(y);
-          }
-
-          {
-            FT_Outline  dummy = gloader->base.outline;
-
-
-            dummy.points  += num_base_points;
-            dummy.n_points = (short)num_new_points;
-
-            FT_Outline_Translate( &dummy, x, y );
-          }
-        }
-      }
-      break;
-
-    default:
-      /* we don't support other formats (yet?) */
-      error = FT_Err_Unimplemented_Feature;
-    }
-
-  Hint_Metrics:
-    if ( depth == 0 )
-    {
-      FT_BBox  bbox;
-
-
-      /* transform the hinted outline if needed */
-      if ( loader->transformed )
-        FT_Outline_Transform( &gloader->base.outline, &loader->trans_matrix );
-
-      /* we must translate our final outline by -pp1.x and compute */
-      /* the new metrics                                           */
-      if ( loader->pp1.x )
-        FT_Outline_Translate( &gloader->base.outline, -loader->pp1.x, 0 );
-
-      FT_Outline_Get_CBox( &gloader->base.outline, &bbox );
-
-      bbox.xMin  = FT_PIX_FLOOR(  bbox.xMin );
-      bbox.yMin  = FT_PIX_FLOOR(  bbox.yMin );
-      bbox.xMax  = FT_PIX_CEIL( bbox.xMax );
-      bbox.yMax  = FT_PIX_CEIL( bbox.yMax );
-
-      slot->metrics.width        = bbox.xMax - bbox.xMin;
-      slot->metrics.height       = bbox.yMax - bbox.yMin;
-      slot->metrics.horiBearingX = bbox.xMin;
-      slot->metrics.horiBearingY = bbox.yMax;
-
-      /* for mono-width fonts (like Andale, Courier, etc.) we need */
-      /* to keep the original rounded advance width                */
-#if 0
-      if ( !FT_IS_FIXED_WIDTH( slot->face ) )
-        slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
-      else
-        slot->metrics.horiAdvance = FT_MulFix( slot->metrics.horiAdvance,
-                                               x_scale );
-#else
-      slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;
-#endif
-
-      slot->metrics.horiAdvance = FT_PIX_ROUND( slot->metrics.horiAdvance );
-
-      /* now copy outline into glyph slot */
-      FT_GlyphLoader_Rewind( loader->gloader );
-      error = FT_GlyphLoader_CopyPoints( loader->gloader, gloader );
-      if ( error )
-        goto Exit;
-
-      slot->outline = slot->internal->loader->base.outline;
-      slot->format  = FT_GLYPH_FORMAT_OUTLINE;
-    }
-
-#ifdef DEBUG_HINTER
-    af_debug_hinter = hinter;
-#endif
-
-  Exit:
-    return error;
-  }
-
-
-
-
-  FT_LOCAL_DEF( FT_Error )
-  af_loader_load_glyph( AF_Loader  loader,
-                        FT_Face    face,
-                        FT_UInt    gindex,
-                        FT_UInt32  load_flags )
-  {
-    FT_Error      error;
-    FT_Size       size = face->size;
-    AF_ScalerRec  scaler;
-
-    if ( !size )
-      return FT_Err_Invalid_Argument;
-
-    FT_ZERO( &scaler );
-
-    scaler.face    = face;
-    scaler.x_scale = size->metrics.x_scale;
-    scaler.x_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */
-    scaler.y_scale = size->metrics.y_scale;
-    scaler.y_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */
-
-    scaler.render_mode = FT_LOAD_TARGET_MODE( load_flags );
-    scaler.flags       = 0;  /* XXX: fix this */
-
-    error = af_loader_reset( loader, face );
-    if ( !error )
-    {
-      AF_ScriptMetrics  metrics;
-
-      error = af_face_globals_get_metrics( loader->globals, gindex, &metrics );
-      if ( !error )
-      {
-        metrics->clazz->script_metrics_scale( metrics, &scaler );
-
-        load_flags |=  FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_TRANSFORM;
-        load_flags &= ~FT_LOAD_RENDER;
-
-        error = af_loader_load_g( loader, &scaler, gindex, load_flags, 0 );
-      }
-    }
-    return error;
-  }
+#include "afloader.h"

+#include "afhints.h"

+#include "afglobal.h"

+#include "aflatin.h"

+

+  FT_LOCAL_DEF( FT_Error )

+  af_loader_init( AF_Loader  loader,

+                  FT_Memory  memory )

+  {

+    FT_Error  error;

+

+    FT_ZERO( loader );

+

+    af_glyph_hints_init( &loader->hints, memory );

+

+    error = FT_GlyphLoader_New( memory, &loader->gloader );

+    if ( !error )

+    {

+      error = FT_GlyphLoader_CreateExtra( loader->gloader );

+      if ( error )

+      {

+        FT_GlyphLoader_Done( loader->gloader );

+        loader->gloader = NULL;

+      }

+    }

+    return error;

+  }

+

+

+  FT_LOCAL_DEF( FT_Error )

+  af_loader_reset( AF_Loader   loader,

+                   FT_Face     face )

+  {

+    FT_Error   error = 0;

+

+    loader->face    = face;

+    loader->globals = (AF_FaceGlobals) face->autohint.data;

+

+    FT_GlyphLoader_Rewind( loader->gloader );

+

+    if ( loader->globals == NULL )

+    {

+      error = af_face_globals_new( face, &loader->globals );

+      if ( !error )

+      {

+        face->autohint.data      = (FT_Pointer) loader->globals;

+        face->autohint.finalizer = (FT_Generic_Finalizer) af_face_globals_free;

+      }

+    }

+    return error;

+  }

+

+

+  FT_LOCAL_DEF( void )

+  af_loader_done( AF_Loader   loader )

+  {

+    loader->face    = NULL;

+    loader->globals = NULL;

+

+    FT_GlyphLoader_Done( loader->gloader );

+    loader->gloader = NULL;

+  }

+

+

+  static FT_Error

+  af_loader_load_g( AF_Loader  loader,

+                    AF_Scaler  scaler,

+                    FT_UInt    glyph_index,

+                    FT_Int32   load_flags,

+                    FT_UInt    depth )

+  {

+    FT_Error          error    = 0;

+    FT_Face           face     = loader->face;

+    AF_FaceGlobals    globals  = loader->globals;

+    FT_GlyphLoader    gloader  = loader->gloader;

+    AF_ScriptMetrics  metrics  = loader->metrics;

+    AF_GlyphHints     hints    = &loader->hints;

+    FT_GlyphSlot      slot     = face->glyph;

+    FT_Slot_Internal  internal = slot->internal;

+

+    error = FT_Load_Glyph( face, glyph_index, load_flags );

+    if ( error )

+      goto Exit;

+

+    loader->transformed = internal->glyph_transformed;

+    if ( loader->transformed )

+    {

+      FT_Matrix  inverse;

+

+      loader->trans_matrix = internal->glyph_matrix;

+      loader->trans_delta  = internal->glyph_delta;

+

+      inverse = loader->trans_matrix;

+      FT_Matrix_Invert( &inverse );

+      FT_Vector_Transform( &loader->trans_delta, &inverse );

+    }

+

+    /* set linear metrics */

+    slot->linearHoriAdvance = slot->metrics.horiAdvance;

+    slot->linearVertAdvance = slot->metrics.vertAdvance;

+

+    switch ( slot->format )

+    {

+      case FT_GLYPH_FORMAT_OUTLINE:

+       /* translate the loaded glyph when an internal transform

+        * is needed

+        */

+        if ( loader->transformed )

+        {

+          FT_Vector*  point = slot->outline.points;

+          FT_Vector*  limit = point + slot->outline.n_points;

+

+          for ( ; point < limit; point++ )

+          {

+            point->x += loader->trans_delta.x;

+            point->y += loader->trans_delta.y;

+          }

+        }

+

+        /* copy the outline points in the loader's current               */

+        /* extra points which is used to keep original glyph coordinates */

+        error = FT_GlyphLoader_CheckPoints( gloader,

+                                            slot->outline.n_points + 2,

+                                            slot->outline.n_contours );

+        if ( error )

+          goto Exit;

+

+        FT_ARRAY_COPY( gloader->current.outline.points,

+                       slot->outline.points,

+                       slot->outline.n_points );

+

+        FT_ARRAY_COPY( gloader->current.extra_points,

+                       slot->outline.points,

+                       slot->outline.n_points );

+

+        FT_ARRAY_COPY( gloader->current.outline.contours,

+                       slot->outline.contours,

+                       slot->outline.n_contours );

+

+        FT_ARRAY_COPY( gloader->current.outline.tags,

+                       slot->outline.tags,

+                       slot->outline.n_points );

+

+        gloader->current.outline.n_points   = slot->outline.n_points;

+        gloader->current.outline.n_contours = slot->outline.n_contours;

+

+        /* compute original phantom points */

+        loader->pp1.x = hints->x_delta;

+        loader->pp1.y = hints->y_delta;

+        loader->pp2.x = FT_MulFix( slot->metrics.horiAdvance,

+                                   hints->x_scale ) + hints->x_delta;

+        loader->pp2.y = hints->y_delta;

+

+        /* be sure to check for spacing glyphs */

+        if ( slot->outline.n_points == 0 )

+          goto Hint_Metrics;

+

+        /* now load the slot image into the auto-outline and run the */

+        /* automatic hinting process                                 */

+        error = metrics->clazz->script_hints_init( hints,

+                                                   &gloader->current.outline,

+                                                   metrics );

+        if ( error )

+          goto Exit;

+

+        /* apply the hints */

+        metrics->clazz->script_hints_apply( hints,

+                                            &gloader->current.outline,

+                                            metrics );

+        /* we now need to hint the metrics according to the change in */

+        /* width/positioning that occured during the hinting process  */

+        {

+          FT_Pos        old_advance, old_rsb, old_lsb, new_lsb;

+          AF_AxisHints  axis  = &hints->axis[ AF_DIMENSION_HORZ ];

+          AF_Edge       edge1 = axis->edges;    /* leftmost edge  */

+          AF_Edge       edge2 = edge1 + axis->num_edges - 1; /* rightmost edge */

+

+

+          old_advance = loader->pp2.x;

+          old_rsb     = old_advance - edge2->opos;

+          old_lsb     = edge1->opos;

+          new_lsb     = edge1->pos;

+

+          loader->pp1.x = FT_PIX_ROUND( new_lsb    - old_lsb );

+          loader->pp2.x = FT_PIX_ROUND( edge2->pos + old_rsb );

+

+#if 0

+          /* try to fix certain bad advance computations */

+          if ( loader->pp2.x + loader->pp1.x == edge2->pos && old_rsb > 4 )

+            loader->pp2.x += 64;

+#endif

+        }

+

+        /* good, we simply add the glyph to our loader's base */

+        FT_GlyphLoader_Add( gloader );

+        break;

+

+    case FT_GLYPH_FORMAT_COMPOSITE:

+      {

+        FT_UInt      nn, num_subglyphs = slot->num_subglyphs;

+        FT_UInt      num_base_subgs, start_point;

+        FT_SubGlyph  subglyph;

+

+

+        start_point = gloader->base.outline.n_points;

+

+        /* first of all, copy the subglyph descriptors in the glyph loader */

+        error = FT_GlyphLoader_CheckSubGlyphs( gloader, num_subglyphs );

+        if ( error )

+          goto Exit;

+

+        FT_ARRAY_COPY( gloader->current.subglyphs,

+                       slot->subglyphs,

+                       num_subglyphs );

+

+        gloader->current.num_subglyphs = num_subglyphs;

+        num_base_subgs = gloader->base.num_subglyphs;

+

+        /* now, read each subglyph independently */

+        for ( nn = 0; nn < num_subglyphs; nn++ )

+        {

+          FT_Vector  pp1, pp2;

+          FT_Pos     x, y;

+          FT_UInt    num_points, num_new_points, num_base_points;

+

+

+          /* gloader.current.subglyphs can change during glyph loading due */

+          /* to re-allocation -- we must recompute the current subglyph on */

+          /* each iteration                                                */

+          subglyph = gloader->base.subglyphs + num_base_subgs + nn;

+

+          pp1 = loader->pp1;

+          pp2 = loader->pp2;

+

+          num_base_points = gloader->base.outline.n_points;

+

+          error = af_loader_load_g( loader, scaler, subglyph->index,

+                                    load_flags, depth + 1 );

+          if ( error )

+            goto Exit;

+

+          /* recompute subglyph pointer */

+          subglyph = gloader->base.subglyphs + num_base_subgs + nn;

+

+          if ( subglyph->flags & FT_SUBGLYPH_FLAG_USE_MY_METRICS )

+          {

+            pp1 = loader->pp1;

+            pp2 = loader->pp2;

+          }

+          else

+          {

+            loader->pp1 = pp1;

+            loader->pp2 = pp2;

+          }

+

+          num_points     = gloader->base.outline.n_points;

+          num_new_points = num_points - num_base_points;

+

+          /* now perform the transform required for this subglyph */

+

+          if ( subglyph->flags & ( FT_SUBGLYPH_FLAG_SCALE    |

+                                   FT_SUBGLYPH_FLAG_XY_SCALE |

+                                   FT_SUBGLYPH_FLAG_2X2      ) )

+          {

+            FT_Vector*  cur   = gloader->base.outline.points +

+                                num_base_points;

+            FT_Vector*  org   = gloader->base.extra_points +

+                                num_base_points;

+            FT_Vector*  limit = cur + num_new_points;

+

+

+            for ( ; cur < limit; cur++, org++ )

+            {

+              FT_Vector_Transform( cur, &subglyph->transform );

+              FT_Vector_Transform( org, &subglyph->transform );

+            }

+          }

+

+          /* apply offset */

+

+          if ( !( subglyph->flags & FT_SUBGLYPH_FLAG_ARGS_ARE_XY_VALUES ) )

+          {

+            FT_Int      k = subglyph->arg1;

+            FT_UInt     l = subglyph->arg2;

+            FT_Vector*  p1;

+            FT_Vector*  p2;

+

+

+            if ( start_point + k >= num_base_points         ||

+                               l >= (FT_UInt)num_new_points )

+            {

+              error = FT_Err_Invalid_Composite;

+              goto Exit;

+            }

+

+            l += num_base_points;

+

+            /* for now, only use the current point coordinates;    */

+            /* we may consider another approach in the near future */

+            p1 = gloader->base.outline.points + start_point + k;

+            p2 = gloader->base.outline.points + start_point + l;

+

+            x = p1->x - p2->x;

+            y = p1->y - p2->y;

+          }

+          else

+          {

+            x = FT_MulFix( subglyph->arg1, hints->x_scale ) + hints->x_delta;

+            y = FT_MulFix( subglyph->arg2, hints->y_scale ) + hints->y_delta;

+

+            x = FT_PIX_ROUND(x);

+            y = FT_PIX_ROUND(y);

+          }

+

+          {

+            FT_Outline  dummy = gloader->base.outline;

+

+

+            dummy.points  += num_base_points;

+            dummy.n_points = (short)num_new_points;

+

+            FT_Outline_Translate( &dummy, x, y );

+          }

+        }

+      }

+      break;

+

+    default:

+      /* we don't support other formats (yet?) */

+      error = FT_Err_Unimplemented_Feature;

+    }

+

+  Hint_Metrics:

+    if ( depth == 0 )

+    {

+      FT_BBox  bbox;

+

+

+      /* transform the hinted outline if needed */

+      if ( loader->transformed )

+        FT_Outline_Transform( &gloader->base.outline, &loader->trans_matrix );

+

+      /* we must translate our final outline by -pp1.x and compute */

+      /* the new metrics                                           */

+      if ( loader->pp1.x )

+        FT_Outline_Translate( &gloader->base.outline, -loader->pp1.x, 0 );

+

+      FT_Outline_Get_CBox( &gloader->base.outline, &bbox );

+

+      bbox.xMin  = FT_PIX_FLOOR(  bbox.xMin );

+      bbox.yMin  = FT_PIX_FLOOR(  bbox.yMin );

+      bbox.xMax  = FT_PIX_CEIL( bbox.xMax );

+      bbox.yMax  = FT_PIX_CEIL( bbox.yMax );

+

+      slot->metrics.width        = bbox.xMax - bbox.xMin;

+      slot->metrics.height       = bbox.yMax - bbox.yMin;

+      slot->metrics.horiBearingX = bbox.xMin;

+      slot->metrics.horiBearingY = bbox.yMax;

+

+      /* for mono-width fonts (like Andale, Courier, etc.) we need */

+      /* to keep the original rounded advance width                */

+#if 0

+      if ( !FT_IS_FIXED_WIDTH( slot->face ) )

+        slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;

+      else

+        slot->metrics.horiAdvance = FT_MulFix( slot->metrics.horiAdvance,

+                                               x_scale );

+#else

+      slot->metrics.horiAdvance = loader->pp2.x - loader->pp1.x;

+#endif

+

+      slot->metrics.horiAdvance = FT_PIX_ROUND( slot->metrics.horiAdvance );

+

+      /* now copy outline into glyph slot */

+      FT_GlyphLoader_Rewind( internal->loader );

+      error = FT_GlyphLoader_CopyPoints( internal->loader, gloader );

+      if ( error )

+        goto Exit;

+

+      slot->outline = internal->loader->base.outline;

+      slot->format  = FT_GLYPH_FORMAT_OUTLINE;

+    }

+

+#ifdef DEBUG_HINTER

+    af_debug_hinter = hinter;

+#endif

+

+  Exit:

+    return error;

+  }

+

+

+

+

+  FT_LOCAL_DEF( FT_Error )

+  af_loader_load_glyph( AF_Loader  loader,

+                        FT_Face    face,

+                        FT_UInt    gindex,

+                        FT_UInt32  load_flags )

+  {

+    FT_Error      error;

+    FT_Size       size = face->size;

+    AF_ScalerRec  scaler;

+

+    if ( !size )

+      return FT_Err_Invalid_Argument;

+

+    FT_ZERO( &scaler );

+

+    scaler.face    = face;

+    scaler.x_scale = size->metrics.x_scale;

+    scaler.x_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */

+    scaler.y_scale = size->metrics.y_scale;

+    scaler.y_delta = 0;  /* XXX: TODO: add support for sub-pixel hinting */

+

+    scaler.render_mode = FT_LOAD_TARGET_MODE( load_flags );

+    scaler.flags       = 0;  /* XXX: fix this */

+

+    error = af_loader_reset( loader, face );

+    if ( !error )

+    {

+      AF_ScriptMetrics  metrics;

+

+      error = af_face_globals_get_metrics( loader->globals, gindex, &metrics );

+      if ( !error )

+      {

+        loader->metrics = metrics;

+

+        metrics->clazz->script_metrics_scale( metrics, &scaler );

+

+        load_flags |=  FT_LOAD_NO_SCALE | FT_LOAD_IGNORE_TRANSFORM;

+        load_flags &= ~FT_LOAD_RENDER;

+

+        error = af_loader_load_g( loader, &scaler, gindex, load_flags, 0 );

+      }

+    }

+    return error;

+  }

diff --git a/src/autofit/aftypes.h b/src/autofit/aftypes.h
index 3f968fc33..798539002 100644
--- a/src/autofit/aftypes.h
+++ b/src/autofit/aftypes.h
@@ -1,266 +1,266 @@
-#ifndef __AFTYPES_H__
-#define __AFTYPES_H__
-
-#include <ft2build.h>
-#include FT_FREETYPE_H
-#include FT_OUTLINE_H
-#include FT_INTERNAL_OBJECTS_H
-#include FT_INTERNAL_DEBUG_H
-
-FT_BEGIN_HEADER
-
- /**************************************************************************/
- /**************************************************************************/
- /*****                                                                *****/
- /*****                D E B U G G I N G                               *****/
- /*****                                                                *****/
- /**************************************************************************/
- /**************************************************************************/
-
-#define xxAF_DEBUG
-
-#ifdef AF_DEBUG
-
-#  include <stdio.h>
-#  define AF_LOG( x )  printf ## x
-
-#else
-
-#  define AF_LOG( x )  do ; while ( 0 ) /* nothing */
-
-#endif /* AF_DEBUG */
-
- /**************************************************************************/
- /**************************************************************************/
- /*****                                                                *****/
- /*****                U T I L I T Y                                   *****/
- /*****                                                                *****/
- /**************************************************************************/
- /**************************************************************************/
-
-  typedef struct AF_WidthRec_
-  {
-    FT_Pos  org;  /* original position/width in font units              */
-    FT_Pos  cur;  /* current/scaled position/width in device sub-pixels */
-    FT_Pos  fit;  /* current/fitted position/width in device sub-pixels */
-
-  } AF_WidthRec, *AF_Width;
-
-
-  FT_LOCAL( void )
-  af_sort_pos( FT_UInt   count,
-               FT_Pos*   table );
-
-  FT_LOCAL( void )
-  af_sort_widths( FT_UInt   count,
-                  AF_Width  widths );
-
-
- /**************************************************************************/
- /**************************************************************************/
- /*****                                                                *****/
- /*****                A N G L E   T Y P E S                           *****/
- /*****                                                                *****/
- /**************************************************************************/
- /**************************************************************************/
-
- /*
-  *  Angle type. The auto-fitter doesn't need a very high angular accuracy,
-  *  and this allows us to speed up some computations considerably with a
-  *  light Cordic algorithm (see afangles.c)
-  *
-  */
-
-  typedef FT_Int    AF_Angle;
-
-#define  AF_ANGLE_PI     128
-#define  AF_ANGLE_2PI    (AF_ANGLE_PI*2)
-#define  AF_ANGLE_PI2    (AF_ANGLE_PI/2)
-#define  AF_ANGLE_PI4    (AF_ANGLE_PI/4)
-
- /*
-  *  compute the angle of a given 2-D vector
-  *
-  */
-  FT_LOCAL( AF_Angle )
-  af_angle_atan( FT_Pos  dx,
-                 FT_Pos  dy );
-
-
- /*
-  *  computes "angle2 - angle1", the result is always within
-  *  the range [ -AF_ANGLE_PI .. AF_ANGLE_PI-1 ]
-  *
-  */
-  FT_LOCAL( AF_Angle )
-  af_angle_diff( AF_Angle  angle1,
-                 AF_Angle  angle2 );
-
-
- /**************************************************************************/
- /**************************************************************************/
- /*****                                                                *****/
- /*****                O U T L I N E S                                 *****/
- /*****                                                                *****/
- /**************************************************************************/
- /**************************************************************************/
-
- /* opaque handle to glyph-specific hints. see "afhints.h" for more
-  * details
-  */
-  typedef struct AF_GlyphHintsRec_*     AF_GlyphHints;
-
- /* this structure is used to model an input glyph outline to
-  * the auto-hinter. The latter will set the "hints" field
-  * depending on the glyph's script
-  */
-  typedef struct AF_OutlineRec_
-  {
-    FT_Face          face;
-    FT_Outline       outline;
-    FT_UInt          outline_resolution;
-
-    FT_Int           advance;
-    FT_UInt          metrics_resolution;
-
-    AF_GlyphHints    hints;
-
-  } AF_OutlineRec;
-
-
- /**************************************************************************/
- /**************************************************************************/
- /*****                                                                *****/
- /*****                S C A L E R S                                   *****/
- /*****                                                                *****/
- /**************************************************************************/
- /**************************************************************************/
-
- /*
-  *  A scaler models the target pixel device that will receive the
-  *  auto-hinted glyph image
-  *
-  */
-
-  typedef enum
-  {
-    AF_SCALER_FLAG_NO_HORIZONTAL = 1,  /* disable horizontal hinting */
-    AF_SCALER_FLAG_NO_VERTICAL   = 2,  /* disable vertical hinting   */
-    AF_SCALER_FLAG_NO_ADVANCE    = 4   /* disable advance hinting    */
-
-  } AF_ScalerFlags;
-
-
-  typedef struct AF_ScalerRec_
-  {
-    FT_Face         face;         /* source font face                        */
-    FT_Fixed        x_scale;      /* from font units to 1/64th device pixels */
-    FT_Fixed        y_scale;      /* from font units to 1/64th device pixels */
-    FT_Pos          x_delta;      /* in 1/64th device pixels                 */
-    FT_Pos          y_delta;      /* in 1/64th device pixels                 */
-    FT_Render_Mode  render_mode;  /* monochrome, anti-aliased, LCD, etc..    */
-    FT_UInt32       flags;        /* additionnal control flags, see above    */
-
-  } AF_ScalerRec, *AF_Scaler;
-
-
-
- /**************************************************************************/
- /**************************************************************************/
- /*****                                                                *****/
- /*****                S C R I P T S                                   *****/
- /*****                                                                *****/
- /**************************************************************************/
- /**************************************************************************/
-
- /*
-  *  the list of know scripts. Each different script correspond to the
-  *  following information:
-  *
-  *   - a set of Unicode ranges to test weither the face supports the
-  *     script
-  *
-  *   - a specific global analyzer that will compute global metrics
-  *     specific to the script.
-  *
-  *   - a specific glyph analyzer that will compute segments and
-  *     edges for each glyph covered by the script
-  *
-  *   - a specific grid-fitting algorithm that will distort the
-  *     scaled glyph outline according to the results of the glyph
-  *     analyzer
-  *
-  *  note that a given analyzer and/or grid-fitting algorithm can be
-  *  used by more than one script
-  */
-  typedef enum
-  {
-    AF_SCRIPT_LATIN = 0,
-    /* add new scripts here. don't forget to update the list in "afglobal.c" */
-
-    AF_SCRIPT_MAX   /* do not remove */
-
-  } AF_Script;
-
-
-
-  typedef struct AF_ScriptClassRec_ const*  AF_ScriptClass;
-
-  typedef struct AF_ScriptMetricsRec_
-  {
-    AF_ScriptClass    clazz;
-
-  } AF_ScriptMetricsRec, *AF_ScriptMetrics;
-
-
- /* this function parses a FT_Face to compute global metrics for
-  * a specific script
-  */
-  typedef FT_Error  (*AF_Script_InitMetricsFunc)( AF_ScriptMetrics   metrics,
-                                                  FT_Face            face );
-
-  typedef void      (*AF_Script_ScaleMetricsFunc)( AF_ScriptMetrics  metrics,
-                                                   AF_Scaler         scaler );
-
-  typedef void      (*AF_Script_DoneMetricsFunc)( AF_ScriptMetrics   metrics );
-
-
-  typedef FT_Error  (*AF_Script_InitHintsFunc)( AF_GlyphHints     hints,
-                                                FT_Outline*       outline,
-                                                AF_ScriptMetrics  metrics );
-
-  typedef void      (*AF_Script_ApplyHintsFunc)( AF_GlyphHints     hints,
-                                                 FT_Outline*       outline,
-                                                 AF_ScriptMetrics  metrics );
-
-
-  typedef struct AF_Script_UniRangeRec_
-  {
-    FT_UInt32    first;
-    FT_UInt32    last;
-
-  } AF_Script_UniRangeRec;
-
-  typedef const AF_Script_UniRangeRec *  AF_Script_UniRange;
-
-  typedef struct AF_ScriptClassRec_
-  {
-    AF_Script                   script;
-    AF_Script_UniRange          script_uni_ranges;  /* last must be { 0, 0 } */
-
-    FT_UInt                     script_metrics_size;
-    AF_Script_InitMetricsFunc   script_metrics_init;
-    AF_Script_ScaleMetricsFunc  script_metrics_scale;
-    AF_Script_DoneMetricsFunc   script_metrics_done;
-
-    AF_Script_InitHintsFunc     script_hints_init;
-    AF_Script_ApplyHintsFunc    script_hints_apply;
-
-  } AF_ScriptClassRec;
-
-
-/* */
-
-FT_END_HEADER
-
-#endif /* __AFTYPES_H__ */
+#ifndef __AFTYPES_H__

+#define __AFTYPES_H__

+

+#include <ft2build.h>

+#include FT_FREETYPE_H

+#include FT_OUTLINE_H

+#include FT_INTERNAL_OBJECTS_H

+#include FT_INTERNAL_DEBUG_H

+

+FT_BEGIN_HEADER

+

+ /**************************************************************************/

+ /**************************************************************************/

+ /*****                                                                *****/

+ /*****                D E B U G G I N G                               *****/

+ /*****                                                                *****/

+ /**************************************************************************/

+ /**************************************************************************/

+

+#define AF_DEBUG

+

+#ifdef AF_DEBUG

+

+#  include <stdio.h>

+#  define AF_LOG( x )  printf x

+

+#else

+

+#  define AF_LOG( x )  do ; while ( 0 ) /* nothing */

+

+#endif /* AF_DEBUG */

+

+ /**************************************************************************/

+ /**************************************************************************/

+ /*****                                                                *****/

+ /*****                U T I L I T Y                                   *****/

+ /*****                                                                *****/

+ /**************************************************************************/

+ /**************************************************************************/

+

+  typedef struct AF_WidthRec_

+  {

+    FT_Pos  org;  /* original position/width in font units              */

+    FT_Pos  cur;  /* current/scaled position/width in device sub-pixels */

+    FT_Pos  fit;  /* current/fitted position/width in device sub-pixels */

+

+  } AF_WidthRec, *AF_Width;

+

+

+  FT_LOCAL( void )

+  af_sort_pos( FT_UInt   count,

+               FT_Pos*   table );

+

+  FT_LOCAL( void )

+  af_sort_widths( FT_UInt   count,

+                  AF_Width  widths );

+

+

+ /**************************************************************************/

+ /**************************************************************************/

+ /*****                                                                *****/

+ /*****                A N G L E   T Y P E S                           *****/

+ /*****                                                                *****/

+ /**************************************************************************/

+ /**************************************************************************/

+

+ /*

+  *  Angle type. The auto-fitter doesn't need a very high angular accuracy,

+  *  and this allows us to speed up some computations considerably with a

+  *  light Cordic algorithm (see afangles.c)

+  *

+  */

+

+  typedef FT_Int    AF_Angle;

+

+#define  AF_ANGLE_PI     128

+#define  AF_ANGLE_2PI    (AF_ANGLE_PI*2)

+#define  AF_ANGLE_PI2    (AF_ANGLE_PI/2)

+#define  AF_ANGLE_PI4    (AF_ANGLE_PI/4)

+

+ /*

+  *  compute the angle of a given 2-D vector

+  *

+  */

+  FT_LOCAL( AF_Angle )

+  af_angle_atan( FT_Pos  dx,

+                 FT_Pos  dy );

+

+

+ /*

+  *  computes "angle2 - angle1", the result is always within

+  *  the range [ -AF_ANGLE_PI .. AF_ANGLE_PI-1 ]

+  *

+  */

+  FT_LOCAL( AF_Angle )

+  af_angle_diff( AF_Angle  angle1,

+                 AF_Angle  angle2 );

+

+

+ /**************************************************************************/

+ /**************************************************************************/

+ /*****                                                                *****/

+ /*****                O U T L I N E S                                 *****/

+ /*****                                                                *****/

+ /**************************************************************************/

+ /**************************************************************************/

+

+ /* opaque handle to glyph-specific hints. see "afhints.h" for more

+  * details

+  */

+  typedef struct AF_GlyphHintsRec_*     AF_GlyphHints;

+

+ /* this structure is used to model an input glyph outline to

+  * the auto-hinter. The latter will set the "hints" field

+  * depending on the glyph's script

+  */

+  typedef struct AF_OutlineRec_

+  {

+    FT_Face          face;

+    FT_Outline       outline;

+    FT_UInt          outline_resolution;

+

+    FT_Int           advance;

+    FT_UInt          metrics_resolution;

+

+    AF_GlyphHints    hints;

+

+  } AF_OutlineRec;

+

+

+ /**************************************************************************/

+ /**************************************************************************/

+ /*****                                                                *****/

+ /*****                S C A L E R S                                   *****/

+ /*****                                                                *****/

+ /**************************************************************************/

+ /**************************************************************************/

+

+ /*

+  *  A scaler models the target pixel device that will receive the

+  *  auto-hinted glyph image

+  *

+  */

+

+  typedef enum

+  {

+    AF_SCALER_FLAG_NO_HORIZONTAL = 1,  /* disable horizontal hinting */

+    AF_SCALER_FLAG_NO_VERTICAL   = 2,  /* disable vertical hinting   */

+    AF_SCALER_FLAG_NO_ADVANCE    = 4   /* disable advance hinting    */

+

+  } AF_ScalerFlags;

+

+

+  typedef struct AF_ScalerRec_

+  {

+    FT_Face         face;         /* source font face                        */

+    FT_Fixed        x_scale;      /* from font units to 1/64th device pixels */

+    FT_Fixed        y_scale;      /* from font units to 1/64th device pixels */

+    FT_Pos          x_delta;      /* in 1/64th device pixels                 */

+    FT_Pos          y_delta;      /* in 1/64th device pixels                 */

+    FT_Render_Mode  render_mode;  /* monochrome, anti-aliased, LCD, etc..    */

+    FT_UInt32       flags;        /* additionnal control flags, see above    */

+

+  } AF_ScalerRec, *AF_Scaler;

+

+

+

+ /**************************************************************************/

+ /**************************************************************************/

+ /*****                                                                *****/

+ /*****                S C R I P T S                                   *****/

+ /*****                                                                *****/

+ /**************************************************************************/

+ /**************************************************************************/

+

+ /*

+  *  the list of know scripts. Each different script correspond to the

+  *  following information:

+  *

+  *   - a set of Unicode ranges to test weither the face supports the

+  *     script

+  *

+  *   - a specific global analyzer that will compute global metrics

+  *     specific to the script.

+  *

+  *   - a specific glyph analyzer that will compute segments and

+  *     edges for each glyph covered by the script

+  *

+  *   - a specific grid-fitting algorithm that will distort the

+  *     scaled glyph outline according to the results of the glyph

+  *     analyzer

+  *

+  *  note that a given analyzer and/or grid-fitting algorithm can be

+  *  used by more than one script

+  */

+  typedef enum

+  {

+    AF_SCRIPT_LATIN = 0,

+    /* add new scripts here. don't forget to update the list in "afglobal.c" */

+

+    AF_SCRIPT_MAX   /* do not remove */

+

+  } AF_Script;

+

+

+

+  typedef struct AF_ScriptClassRec_ const*  AF_ScriptClass;

+

+  typedef struct AF_ScriptMetricsRec_

+  {

+    AF_ScriptClass    clazz;

+

+  } AF_ScriptMetricsRec, *AF_ScriptMetrics;

+

+

+ /* this function parses a FT_Face to compute global metrics for

+  * a specific script

+  */

+  typedef FT_Error  (*AF_Script_InitMetricsFunc)( AF_ScriptMetrics   metrics,

+                                                  FT_Face            face );

+

+  typedef void      (*AF_Script_ScaleMetricsFunc)( AF_ScriptMetrics  metrics,

+                                                   AF_Scaler         scaler );

+

+  typedef void      (*AF_Script_DoneMetricsFunc)( AF_ScriptMetrics   metrics );

+

+

+  typedef FT_Error  (*AF_Script_InitHintsFunc)( AF_GlyphHints     hints,

+                                                FT_Outline*       outline,

+                                                AF_ScriptMetrics  metrics );

+

+  typedef void      (*AF_Script_ApplyHintsFunc)( AF_GlyphHints     hints,

+                                                 FT_Outline*       outline,

+                                                 AF_ScriptMetrics  metrics );

+

+

+  typedef struct AF_Script_UniRangeRec_

+  {

+    FT_UInt32    first;

+    FT_UInt32    last;

+

+  } AF_Script_UniRangeRec;

+

+  typedef const AF_Script_UniRangeRec *  AF_Script_UniRange;

+

+  typedef struct AF_ScriptClassRec_

+  {

+    AF_Script                   script;

+    AF_Script_UniRange          script_uni_ranges;  /* last must be { 0, 0 } */

+

+    FT_UInt                     script_metrics_size;

+    AF_Script_InitMetricsFunc   script_metrics_init;

+    AF_Script_ScaleMetricsFunc  script_metrics_scale;

+    AF_Script_DoneMetricsFunc   script_metrics_done;

+

+    AF_Script_InitHintsFunc     script_hints_init;

+    AF_Script_ApplyHintsFunc    script_hints_apply;

+

+  } AF_ScriptClassRec;

+

+

+/* */

+

+FT_END_HEADER

+

+#endif /* __AFTYPES_H__ */