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/*
* $XFree86: xc/lib/Xft/xftextent.c,v 1.10 2002/12/14 01:59:38 dawes Exp $
*
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <string.h>
#include "xftint.h"
void
XftGlyphExtents (Display *dpy,
XftFont *pub,
_Xconst FT_UInt *glyphs,
int nglyphs,
XGlyphInfo *extents)
{
XftFontInt *font = (XftFontInt *) pub;
FT_UInt missing[XFT_NMISSING];
int nmissing;
int n;
_Xconst FT_UInt *g;
FT_UInt glyph;
XftGlyph *xftg;
FcBool glyphs_loaded;
int x, y;
int left, right, top, bottom;
int overall_left, overall_right;
int overall_top, overall_bottom;
g = glyphs;
n = nglyphs;
nmissing = 0;
glyphs_loaded = FcFalse;
while (n--)
if (XftFontCheckGlyph (dpy, pub, FcFalse, *g++, missing, &nmissing))
glyphs_loaded = FcTrue;
if (nmissing)
XftFontLoadGlyphs (dpy, pub, FcFalse, missing, nmissing);
g = glyphs;
n = nglyphs;
xftg = 0;
while (n)
{
glyph = *g++;
n--;
if (glyph < font->num_glyphs &&
(xftg = font->glyphs[glyph]))
break;
}
if (n == 0 && !xftg)
{
extents->width = 0;
extents->height = 0;
extents->x = 0;
extents->y = 0;
extents->yOff = 0;
extents->xOff = 0;
}
else
{
x = 0;
y = 0;
overall_left = x - xftg->metrics.x;
overall_top = y - xftg->metrics.y;
overall_right = overall_left + (int) xftg->metrics.width;
overall_bottom = overall_top + (int) xftg->metrics.height;
x += xftg->metrics.xOff;
y += xftg->metrics.yOff;
while (n--)
{
glyph = *g++;
if (glyph < font->num_glyphs && (xftg = font->glyphs[glyph]))
{
left = x - xftg->metrics.x;
top = y - xftg->metrics.y;
right = left + (int) xftg->metrics.width;
bottom = top + (int) xftg->metrics.height;
if (left < overall_left)
overall_left = left;
if (top < overall_top)
overall_top = top;
if (right > overall_right)
overall_right = right;
if (bottom > overall_bottom)
overall_bottom = bottom;
x += xftg->metrics.xOff;
y += xftg->metrics.yOff;
}
}
extents->x = -overall_left;
extents->y = -overall_top;
extents->width = overall_right - overall_left;
extents->height = overall_bottom - overall_top;
extents->xOff = x;
extents->yOff = y;
}
if (glyphs_loaded)
_XftFontManageMemory (dpy, pub);
}
#define NUM_LOCAL 1024
void
XftTextExtents8 (Display *dpy,
XftFont *pub,
_Xconst FcChar8 *string,
int len,
XGlyphInfo *extents)
{
FT_UInt *glyphs, glyphs_local[NUM_LOCAL];
int i;
if (len <= NUM_LOCAL)
glyphs = glyphs_local;
else
{
glyphs = malloc (len * sizeof (FT_UInt));
if (!glyphs)
{
memset (extents, '\0', sizeof (XGlyphInfo));
return;
}
}
for (i = 0; i < len; i++)
glyphs[i] = XftCharIndex (dpy, pub, string[i]);
XftGlyphExtents (dpy, pub, glyphs, len, extents);
if (glyphs != glyphs_local)
free (glyphs);
}
void
XftTextExtents16 (Display *dpy,
XftFont *pub,
_Xconst FcChar16 *string,
int len,
XGlyphInfo *extents)
{
FT_UInt *glyphs, glyphs_local[NUM_LOCAL];
int i;
if (len <= NUM_LOCAL)
glyphs = glyphs_local;
else
{
glyphs = malloc (len * sizeof (FT_UInt));
if (!glyphs)
{
memset (extents, '\0', sizeof (XGlyphInfo));
return;
}
}
for (i = 0; i < len; i++)
glyphs[i] = XftCharIndex (dpy, pub, string[i]);
XftGlyphExtents (dpy, pub, glyphs, len, extents);
if (glyphs != glyphs_local)
free (glyphs);
}
void
XftTextExtents32 (Display *dpy,
XftFont *pub,
_Xconst FcChar32 *string,
int len,
XGlyphInfo *extents)
{
FT_UInt *glyphs, glyphs_local[NUM_LOCAL];
int i;
if (len <= NUM_LOCAL)
glyphs = glyphs_local;
else
{
glyphs = malloc (len * sizeof (FT_UInt));
if (!glyphs)
{
memset (extents, '\0', sizeof (XGlyphInfo));
return;
}
}
for (i = 0; i < len; i++)
glyphs[i] = XftCharIndex (dpy, pub, string[i]);
XftGlyphExtents (dpy, pub, glyphs, len, extents);
if (glyphs != glyphs_local)
free (glyphs);
}
void
XftTextExtentsUtf8 (Display *dpy,
XftFont *pub,
_Xconst FcChar8 *string,
int len,
XGlyphInfo *extents)
{
FT_UInt *glyphs, *glyphs_new, glyphs_local[NUM_LOCAL];
FcChar32 ucs4;
int i;
int l;
int size;
i = 0;
glyphs = glyphs_local;
size = NUM_LOCAL;
while (len && (l = FcUtf8ToUcs4 (string, &ucs4, len)) > 0)
{
if (i == size)
{
glyphs_new = malloc (size * 2 * sizeof (FT_UInt));
if (!glyphs_new)
{
if (glyphs != glyphs_local)
free (glyphs);
memset (extents, '\0', sizeof (XGlyphInfo));
return;
}
memcpy (glyphs_new, glyphs, size * sizeof (FT_UInt));
size *= 2;
if (glyphs != glyphs_local)
free (glyphs);
glyphs = glyphs_new;
}
glyphs[i++] = XftCharIndex (dpy, pub, ucs4);
string += l;
len -= l;
}
XftGlyphExtents (dpy, pub, glyphs, i, extents);
if (glyphs != glyphs_local)
free (glyphs);
}
void
XftTextExtentsUtf16 (Display *dpy,
XftFont *pub,
_Xconst FcChar8 *string,
FcEndian endian,
int len,
XGlyphInfo *extents)
{
FT_UInt *glyphs, *glyphs_new, glyphs_local[NUM_LOCAL];
FcChar32 ucs4;
int i;
int l;
int size;
i = 0;
glyphs = glyphs_local;
size = NUM_LOCAL;
while (len && (l = FcUtf16ToUcs4 (string, endian, &ucs4, len)) > 0)
{
if (i == size)
{
glyphs_new = malloc (size * 2 * sizeof (FT_UInt));
if (!glyphs_new)
{
if (glyphs != glyphs_local)
free (glyphs);
memset (extents, '\0', sizeof (XGlyphInfo));
return;
}
memcpy (glyphs_new, glyphs, size * sizeof (FT_UInt));
size *= 2;
if (glyphs != glyphs_local)
free (glyphs);
glyphs = glyphs_new;
}
glyphs[i++] = XftCharIndex (dpy, pub, ucs4);
string += l;
len -= l;
}
XftGlyphExtents (dpy, pub, glyphs, i, extents);
if (glyphs != glyphs_local)
free (glyphs);
}
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