diff options
Diffstat (limited to 'modules/basic/basic-fc.c')
| -rw-r--r-- | modules/basic/basic-fc.c | 483 |
1 files changed, 0 insertions, 483 deletions
diff --git a/modules/basic/basic-fc.c b/modules/basic/basic-fc.c deleted file mode 100644 index d77dacef..00000000 --- a/modules/basic/basic-fc.c +++ /dev/null @@ -1,483 +0,0 @@ -/* Pango - * basic-fc.c: Basic shaper for FreeType-based backends - * - * Copyright (C) 2000, 2007, 2009 Red Hat Software - * Authors: - * Owen Taylor <otaylor@redhat.com> - * Behdad Esfahbod <behdad@behdad.org> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#include "config.h" -#include <string.h> - -#define PANGO_ENABLE_BACKEND 1 /* XXX */ - -#include "pango-engine.h" -#include "pango-utils.h" -#include "pangofc-fontmap.h" -#include "pangofc-font.h" -#include <hb-ft.h> -#include <hb-glib.h> - -#define PANGO_UNITS_26_6(d) ((d) << 4) - - -/* No extra fields needed */ -typedef PangoEngineShape BasicEngineFc; -typedef PangoEngineShapeClass BasicEngineFcClass; - -#define SCRIPT_ENGINE_NAME "BasicScriptEngineFc" -#define RENDER_TYPE PANGO_RENDER_TYPE_FC - -static PangoEngineScriptInfo basic_scripts[] = { - { PANGO_SCRIPT_COMMON, "" } -}; - -static PangoEngineInfo script_engines[] = { - { - SCRIPT_ENGINE_NAME, - PANGO_ENGINE_TYPE_SHAPE, - RENDER_TYPE, - basic_scripts, G_N_ELEMENTS(basic_scripts) - } -}; - - -/* cache a single hb_buffer_t */ -static hb_buffer_t *cached_buffer = NULL; /* MT-safe */ -G_LOCK_DEFINE_STATIC (cached_buffer); - -static hb_buffer_t * -create_buffer (void) -{ - hb_buffer_t *buffer; - - buffer = hb_buffer_create (); - hb_buffer_set_unicode_funcs (buffer, hb_glib_get_unicode_funcs ()); - - return buffer; -} - -static hb_buffer_t * -acquire_buffer (gboolean *free_buffer) -{ - hb_buffer_t *buffer; - - if (G_LIKELY (G_TRYLOCK (cached_buffer))) - { - if (G_UNLIKELY (!cached_buffer)) - cached_buffer = create_buffer (); - - buffer = cached_buffer; - *free_buffer = FALSE; - } - else - { - buffer = create_buffer (); - *free_buffer = TRUE; - } - - return buffer; -} - -static void -release_buffer (hb_buffer_t *buffer, gboolean free_buffer) -{ - if (G_LIKELY (!free_buffer)) - { - hb_buffer_reset (buffer); - G_UNLOCK (cached_buffer); - } - else - hb_buffer_destroy (buffer); -} - -typedef struct _PangoFcHbContext { - FT_Face ft_face; - PangoFcFont *fc_font; - gboolean vertical; - int improper_sign; -} PangoFcHbContext; - -static hb_bool_t -pango_fc_hb_font_get_glyph (hb_font_t *font, void *font_data, - hb_codepoint_t unicode, hb_codepoint_t variation_selector, - hb_codepoint_t *glyph, - void *user_data G_GNUC_UNUSED) -{ - PangoFcHbContext *context = (PangoFcHbContext *) font_data; - PangoFcFont *fc_font = context->fc_font; - - *glyph = pango_fc_font_get_glyph (fc_font, unicode); - if (G_LIKELY (*glyph)) - return TRUE; - - *glyph = PANGO_GET_UNKNOWN_GLYPH (unicode); - - /* We draw our own invalid-Unicode shape, so prevent HarfBuzz - * from using REPLACEMENT CHARACTER. */ - if (unicode > 0x10FFFF) - return TRUE; - - return FALSE; -} - -static hb_bool_t -pango_fc_hb_font_get_glyph_contour_point (hb_font_t *font, void *font_data, - hb_codepoint_t glyph, unsigned int point_index, - hb_position_t *x, hb_position_t *y, - void *user_data G_GNUC_UNUSED) -{ - return FALSE; -#if 0 - FT_Face ft_face = (FT_Face) font_data; - int load_flags = FT_LOAD_DEFAULT; - - /* TODO: load_flags, embolden, etc */ - - if (HB_UNLIKELY (FT_Load_Glyph (ft_face, glyph, load_flags))) - return FALSE; - - if (HB_UNLIKELY (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)) - return FALSE; - - if (HB_UNLIKELY (point_index >= (unsigned int) ft_face->glyph->outline.n_points)) - return FALSE; - - *x = ft_face->glyph->outline.points[point_index].x; - *y = ft_face->glyph->outline.points[point_index].y; - - return TRUE; -#endif -} - -static hb_position_t -pango_fc_hb_font_get_glyph_advance (hb_font_t *font, void *font_data, - hb_codepoint_t glyph, - void *user_data G_GNUC_UNUSED) -{ - PangoFcHbContext *context = (PangoFcHbContext *) font_data; - PangoFcFont *fc_font = context->fc_font; - PangoRectangle logical; - - pango_font_get_glyph_extents ((PangoFont *) fc_font, glyph, NULL, &logical); - - return logical.width; -} - -static hb_bool_t -pango_fc_hb_font_get_glyph_extents (hb_font_t *font, void *font_data, - hb_codepoint_t glyph, - hb_glyph_extents_t *extents, - void *user_data G_GNUC_UNUSED) -{ - PangoFcHbContext *context = (PangoFcHbContext *) font_data; - PangoFcFont *fc_font = context->fc_font; - PangoRectangle ink; - - pango_font_get_glyph_extents ((PangoFont *) fc_font, glyph, &ink, NULL); - - if (G_LIKELY (!context->vertical)) { - extents->x_bearing = ink.x; - extents->y_bearing = ink.y; - extents->width = ink.width; - extents->height = ink.height; - } else { - /* XXX */ - extents->x_bearing = ink.x; - extents->y_bearing = ink.y; - extents->width = ink.height; - extents->height = ink.width; - } - - return TRUE; -} - -static hb_bool_t -pango_fc_hb_font_get_glyph_h_origin (hb_font_t *font, void *font_data, - hb_codepoint_t glyph, - hb_position_t *x, hb_position_t *y, - void *user_data G_GNUC_UNUSED) -{ - PangoFcHbContext *context = (PangoFcHbContext *) font_data; - FT_Face ft_face = context->ft_face; - int load_flags = FT_LOAD_DEFAULT; - - if (!context->vertical) return TRUE; - - if (FT_Load_Glyph (ft_face, glyph, load_flags)) - return FALSE; - - /* Note: FreeType's vertical metrics grows downward while other FreeType coordinates - * have a Y growing upward. Hence the extra negation. */ - *x = PANGO_UNITS_26_6 (ft_face->glyph->metrics.horiBearingX - ft_face->glyph->metrics.vertBearingX); - *y = PANGO_UNITS_26_6 (ft_face->glyph->metrics.horiBearingY - (-ft_face->glyph->metrics.vertBearingY)); - - /* XXX */ - *x = -*x; - *y = *y; - - return TRUE; -} - -static hb_bool_t -pango_fc_hb_font_get_glyph_v_origin (hb_font_t *font, void *font_data, - hb_codepoint_t glyph, - hb_position_t *x, hb_position_t *y, - void *user_data G_GNUC_UNUSED) -{ - PangoFcHbContext *context = (PangoFcHbContext *) font_data; - FT_Face ft_face = context->ft_face; - int load_flags = FT_LOAD_DEFAULT; - - if (context->vertical) return TRUE; - - if (FT_Load_Glyph (ft_face, glyph, load_flags)) - return FALSE; - - /* Note: FreeType's vertical metrics grows downward while other FreeType coordinates - * have a Y growing upward. Hence the extra negation. */ - *x = PANGO_UNITS_26_6 (ft_face->glyph->metrics.horiBearingX - ft_face->glyph->metrics.vertBearingX); - *y = PANGO_UNITS_26_6 (ft_face->glyph->metrics.horiBearingY - (-ft_face->glyph->metrics.vertBearingY)); - - /* XXX */ - - return TRUE; -} - - -static hb_position_t -pango_fc_hb_font_get_h_kerning (hb_font_t *font, void *font_data, - hb_codepoint_t left_glyph, hb_codepoint_t right_glyph, - void *user_data G_GNUC_UNUSED) -{ - PangoFcHbContext *context = (PangoFcHbContext *) font_data; - FT_Face ft_face = context->ft_face; - FT_Vector kerning; - - if (FT_Get_Kerning (ft_face, left_glyph, right_glyph, FT_KERNING_DEFAULT, &kerning)) - return 0; - - return PANGO_UNITS_26_6 (kerning.x); -} - -static hb_font_funcs_t * -pango_fc_get_hb_font_funcs (void) -{ - static hb_font_funcs_t *funcs; - - if (G_UNLIKELY (!funcs)) { - funcs = hb_font_funcs_create (); - hb_font_funcs_set_glyph_func (funcs, pango_fc_hb_font_get_glyph, NULL, NULL); - hb_font_funcs_set_glyph_h_advance_func (funcs, pango_fc_hb_font_get_glyph_advance, NULL, NULL); - hb_font_funcs_set_glyph_v_advance_func (funcs, pango_fc_hb_font_get_glyph_advance, NULL, NULL); - hb_font_funcs_set_glyph_h_origin_func (funcs, pango_fc_hb_font_get_glyph_h_origin, NULL, NULL); - hb_font_funcs_set_glyph_v_origin_func (funcs, pango_fc_hb_font_get_glyph_v_origin, NULL, NULL); - hb_font_funcs_set_glyph_h_kerning_func (funcs, pango_fc_hb_font_get_h_kerning, NULL, NULL); - /* Don't need v_kerning. */ - hb_font_funcs_set_glyph_extents_func (funcs, pango_fc_hb_font_get_glyph_extents, NULL, NULL); - hb_font_funcs_set_glyph_contour_point_func (funcs, pango_fc_hb_font_get_glyph_contour_point, NULL, NULL); - /* Don't need glyph_name / glyph_from_name */ - } - - return funcs; -} - - - - -static void -basic_engine_shape (PangoEngineShape *engine G_GNUC_UNUSED, - PangoFont *font, - const char *item_text, - unsigned int item_length, - const PangoAnalysis *analysis, - PangoGlyphString *glyphs, - const char *paragraph_text, - unsigned int paragraph_length) -{ - PangoFcHbContext context; - PangoFcFont *fc_font; - FT_Face ft_face; - hb_face_t *hb_face; - hb_font_t *hb_font; - hb_buffer_t *hb_buffer; - hb_direction_t hb_direction; - gboolean free_buffer; - gboolean is_hinted; - hb_glyph_info_t *hb_glyph; - hb_glyph_position_t *hb_position; - int last_cluster; - guint i, num_glyphs; - unsigned int item_offset = item_text - paragraph_text; - hb_feature_t features[8]; - unsigned int num_features = 0; - - g_return_if_fail (font != NULL); - g_return_if_fail (analysis != NULL); - - fc_font = PANGO_FC_FONT (font); - ft_face = pango_fc_font_lock_face (fc_font); - if (!ft_face) - return; - - /* TODO: Cache hb_font? */ - context.ft_face = ft_face; - context.fc_font = fc_font; - context.vertical = PANGO_GRAVITY_IS_VERTICAL (analysis->gravity); - context.improper_sign = PANGO_GRAVITY_IS_IMPROPER (analysis->gravity) ? -1 : +1; - hb_face = hb_ft_face_create_cached (ft_face); - hb_font = hb_font_create (hb_face); - hb_font_set_funcs (hb_font, - pango_fc_get_hb_font_funcs (), - &context, - NULL); - hb_font_set_scale (hb_font, - /* XXX CTM */ - context.improper_sign * - (((guint64) ft_face->size->metrics.x_scale * ft_face->units_per_EM) >> 12), - context.improper_sign * - -(((guint64) ft_face->size->metrics.y_scale * ft_face->units_per_EM) >> 12)); - is_hinted = fc_font->is_hinted; - hb_font_set_ppem (hb_font, - is_hinted ? ft_face->size->metrics.x_ppem : 0, - is_hinted ? ft_face->size->metrics.y_ppem : 0); - - hb_buffer = acquire_buffer (&free_buffer); - - hb_direction = PANGO_GRAVITY_IS_VERTICAL (analysis->gravity) ? HB_DIRECTION_TTB : HB_DIRECTION_LTR; - if (analysis->level % 2) - hb_direction = HB_DIRECTION_REVERSE (hb_direction); - if (PANGO_GRAVITY_IS_IMPROPER (analysis->gravity)) - hb_direction = HB_DIRECTION_REVERSE (hb_direction); - - /* setup buffer */ - - hb_buffer_set_direction (hb_buffer, hb_direction); - hb_buffer_set_script (hb_buffer, hb_glib_script_to_script (analysis->script)); - hb_buffer_set_language (hb_buffer, hb_language_from_string (pango_language_to_string (analysis->language), -1)); - hb_buffer_set_flags (hb_buffer, - (item_offset == 0 ? HB_BUFFER_FLAG_BOT : 0) | - (item_offset + item_length == paragraph_length ? HB_BUFFER_FLAG_EOT : 0)); - - hb_buffer_add_utf8 (hb_buffer, paragraph_text, paragraph_length, item_offset, item_length); - - /* Setup features from fontconfig pattern. */ - if (fc_font->font_pattern) - { - char *s; - while (num_features < G_N_ELEMENTS (features) && - FcResultMatch == FcPatternGetString (fc_font->font_pattern, - PANGO_FC_FONT_FEATURES, - num_features, - (FcChar8 **) &s)) - { - gboolean ret = hb_feature_from_string (s, -1, &features[num_features]); - features[num_features].start = 0; - features[num_features].end = (unsigned int) -1; - if (ret) - num_features++; - } - } - - hb_shape (hb_font, hb_buffer, features, num_features); - - if (PANGO_GRAVITY_IS_IMPROPER (analysis->gravity)) - hb_buffer_reverse (hb_buffer); - - /* buffer output */ - num_glyphs = hb_buffer_get_length (hb_buffer); - hb_glyph = hb_buffer_get_glyph_infos (hb_buffer, NULL); - pango_glyph_string_set_size (glyphs, num_glyphs); - last_cluster = -1; - for (i = 0; i < num_glyphs; i++) - { - glyphs->glyphs[i].glyph = hb_glyph->codepoint; - glyphs->log_clusters[i] = hb_glyph->cluster - item_offset; - glyphs->glyphs[i].attr.is_cluster_start = glyphs->log_clusters[i] != last_cluster; - hb_glyph++; - last_cluster = glyphs->log_clusters[i]; - } - - hb_position = hb_buffer_get_glyph_positions (hb_buffer, NULL); - if (context.vertical) - for (i = 0; i < num_glyphs; i++) - { - unsigned int advance = hb_position->y_advance; - if (is_hinted) - advance = PANGO_UNITS_ROUND (advance); - glyphs->glyphs[i].geometry.width = advance; - /* XXX */ - glyphs->glyphs[i].geometry.x_offset = hb_position->y_offset; - glyphs->glyphs[i].geometry.y_offset = -hb_position->x_offset; - hb_position++; - } - else /* horizontal */ - for (i = 0; i < num_glyphs; i++) - { - unsigned int advance = hb_position->x_advance; - if (is_hinted) - advance = PANGO_UNITS_ROUND (advance); - glyphs->glyphs[i].geometry.width = advance; - glyphs->glyphs[i].geometry.x_offset = hb_position->x_offset; - glyphs->glyphs[i].geometry.y_offset = hb_position->y_offset; - hb_position++; - } - - release_buffer (hb_buffer, free_buffer); - hb_font_destroy (hb_font); - hb_face_destroy (hb_face); - pango_fc_font_unlock_face (fc_font); -} - -static void -basic_engine_fc_class_init (PangoEngineShapeClass *class) -{ - class->script_shape = basic_engine_shape; -} - -PANGO_ENGINE_SHAPE_DEFINE_TYPE (BasicEngineFc, basic_engine_fc, - basic_engine_fc_class_init, NULL) - -void -PANGO_MODULE_ENTRY(init) (GTypeModule *module) -{ - basic_engine_fc_register_type (module); -} - -void -PANGO_MODULE_ENTRY(exit) (void) -{ -} - -void -PANGO_MODULE_ENTRY(list) (PangoEngineInfo **engines, - int *n_engines) -{ - *engines = script_engines; - *n_engines = G_N_ELEMENTS (script_engines); -} - -PangoEngine * -PANGO_MODULE_ENTRY(create) (const char *id) -{ - if (!strcmp (id, SCRIPT_ENGINE_NAME)) - return g_object_new (basic_engine_fc_type, NULL); - else - return NULL; -} |