diff options
| -rw-r--r-- | ChangeLog | 15 | ||||
| -rw-r--r-- | modules/arabic/arabic-fc.c | 8 | ||||
| -rw-r--r-- | modules/basic/basic-fc.c | 263 | ||||
| -rw-r--r-- | modules/syriac/syriac-fc.c | 8 | ||||
| -rw-r--r-- | pango/opentype/pango-ot-ruleset.c | 6 |
5 files changed, 246 insertions, 54 deletions
@@ -1,3 +1,18 @@ +2005-11-23 Behdad Esfahbod <behdad@gnome.org> + + * modules/basic/basic-fc.c: Reworked basic shaper with OpenType + support. (#101079, based on patch from Denis Jacquerye and Noah Levitt) + + * modules/basic/basic-fc.c (basic_scripts): Added Unicode 4.1 addition + script PANGO_SCRIPT_GLAGOLITIC that is a "simple" script. + + * modules/arabic/arabic-fc.c, modules/syriac/syriac-fc.c: Replace + g_utf8_to_ucs4_fast() with g_utf8_strlen()! + + * pango/opentype/pango-ot-ruleset.c (pango_ot_ruleset_add_feature): + Remove reference in docs to pango_ot_ruleset_shape() that was + removed long ago. + 2005-11-22 Behdad Esfahbod <behdad@gnome.org> * pango/pangofc-font.c: Finish previous patch. Use GType private diff --git a/modules/arabic/arabic-fc.c b/modules/arabic/arabic-fc.c index 657eaf2a..3afb9d55 100644 --- a/modules/arabic/arabic-fc.c +++ b/modules/arabic/arabic-fc.c @@ -169,8 +169,7 @@ fallback_shape (PangoEngineShape *engine, PangoGlyphString *glyphs) { PangoFcFont *fc_font = PANGO_FC_FONT (font); - glong n_chars; - gunichar *wcs = g_utf8_to_ucs4_fast (text, length, &n_chars); + glong n_chars = g_utf8_strlen (text, length); const char *p; int i; @@ -236,8 +235,6 @@ fallback_shape (PangoEngineShape *engine, /* Swap all glyphs */ swap_range (glyphs, 0, glyphs->num_glyphs); } - - g_free (wcs); } static void @@ -284,6 +281,8 @@ arabic_engine_shape (PangoEngineShape *engine, properties = g_new0 (gulong, n_chars); Arabic_Assign_Properties (wcs, properties, n_chars); + + g_free (wcs); p = text; for (i=0; i < n_chars; i++) @@ -346,7 +345,6 @@ arabic_engine_shape (PangoEngineShape *engine, pango_ot_ruleset_position (ruleset, buffer); pango_ot_buffer_output (buffer, glyphs); - g_free (wcs); g_free (properties); pango_ot_buffer_destroy (buffer); diff --git a/modules/basic/basic-fc.c b/modules/basic/basic-fc.c index 6d80d938..6098ecc3 100644 --- a/modules/basic/basic-fc.c +++ b/modules/basic/basic-fc.c @@ -26,9 +26,10 @@ #include "pango-engine.h" #include "pango-utils.h" #include "pangofc-font.h" +#include "pango-ot.h" #include "basic-common.h" - + /* No extra fields needed */ typedef PangoEngineShape BasicEngineFc; typedef PangoEngineShapeClass BasicEngineFcClass; @@ -56,6 +57,8 @@ static PangoEngineScriptInfo basic_scripts[] = { { PANGO_SCRIPT_RUNIC, "*" }, { PANGO_SCRIPT_CANADIAN_ABORIGINAL, "*" }, { PANGO_SCRIPT_YI, "*" }, + + /* Unicode-4.0 additions */ { PANGO_SCRIPT_BRAILLE, "*" }, { PANGO_SCRIPT_CYPRIOT, "*" }, { PANGO_SCRIPT_LIMBU, "*" }, @@ -63,6 +66,9 @@ static PangoEngineScriptInfo basic_scripts[] = { { PANGO_SCRIPT_SHAVIAN, "*" }, { PANGO_SCRIPT_LINEAR_B, "*" }, { PANGO_SCRIPT_UGARITIC, "*" }, + + /* Unicode-4.1 additions */ + { PANGO_SCRIPT_GLAGOLITIC, "*" }, { PANGO_SCRIPT_COMMON, "" } }; @@ -119,44 +125,44 @@ set_glyph (PangoFont *font, } static void -basic_engine_shape (PangoEngineShape *engine, - PangoFont *font, - const char *text, - gint length, - PangoAnalysis *analysis, - PangoGlyphString *glyphs) +fallback_shape (PangoEngineShape *engine, + PangoFont *font, + const char *text, + gint length, + PangoAnalysis *analysis, + PangoGlyphString *glyphs) { PangoFcFont *fc_font = PANGO_FC_FONT (font); - int n_chars; - int i; + glong n_chars = g_utf8_strlen (text, length); const char *p; - - g_return_if_fail (font != NULL); - g_return_if_fail (text != NULL); - g_return_if_fail (length >= 0); - g_return_if_fail (analysis != NULL); - - n_chars = g_utf8_strlen (text, length); + int i; + pango_glyph_string_set_size (glyphs, n_chars); - - pango_fc_font_lock_face (fc_font); - p = text; - for (i = 0; i < n_chars; i++) + + for (i=0; i < n_chars; i++) { gunichar wc; gunichar mirrored_ch; PangoGlyph index; + char buf[6]; + const char *input; wc = g_utf8_get_char (p); + input = p; if (analysis->level % 2) if (pango_get_mirror_char (wc, &mirrored_ch)) - wc = mirrored_ch; + { + wc = mirrored_ch; + + g_unichar_to_utf8 (wc, buf); + input = buf; + } if (wc == 0xa0) /* non-break-space */ wc = 0x20; - + if (pango_is_zero_width (wc)) { set_glyph (font, glyphs, i, p - text, 0); @@ -166,9 +172,9 @@ basic_engine_shape (PangoEngineShape *engine, index = pango_fc_font_get_glyph (fc_font, wc); if (!index) - { - set_glyph (font, glyphs, i, p - text, - pango_fc_font_get_unknown_glyph (fc_font, wc)); + { + index = pango_fc_font_get_unknown_glyph (fc_font, wc); + set_glyph (font, glyphs, i, p - text, index); } else { @@ -199,31 +205,206 @@ basic_engine_shape (PangoEngineShape *engine, p = g_utf8_next_char (p); } - /* Simple bidi support; most bidi languages (Arabic, Hebrew, Syriac) - * are in fact handled in other modules. - */ - if (analysis->level % 2) + /* Apply default positioning */ + for (i = 0; i < glyphs->num_glyphs; i++) + { + if (glyphs->glyphs[i].glyph) + { + PangoRectangle logical_rect; + + pango_font_get_glyph_extents (font, glyphs->glyphs[i].glyph, NULL, &logical_rect); + glyphs->glyphs[i].geometry.width = logical_rect.width; + } + else + glyphs->glyphs[i].geometry.width = 0; + + glyphs->glyphs[i].geometry.x_offset = 0; + glyphs->glyphs[i].geometry.y_offset = 0; + } + + if (analysis->level % 2 != 0) { - int start, end; - /* Swap all glyphs */ - swap_range (glyphs, 0, n_chars); + swap_range (glyphs, 0, glyphs->num_glyphs); + } +} + +static const gchar scripts[][5] = +{ + "latn", + "cyrl", + "grek", + "armn", + "geor", + "runr", + "ogam" +}; + +static const gchar gsub_features[][5] = +{ + "ccmp", + "liga", + "clig", +}; + +static const gchar gpos_features[][5] = +{ + "kern", + "mark", + "mkmk" +}; + +static PangoOTRuleset * +get_ruleset (FT_Face face) +{ + PangoOTRuleset *ruleset; + PangoOTInfo *info = NULL; + static GQuark ruleset_quark = 0; + unsigned int i, j; + + info = pango_ot_info_get (face); + if (!info) + return FALSE; + + if (!ruleset_quark) + ruleset_quark = g_quark_from_string ("pango-basic-ruleset"); + + ruleset = g_object_get_qdata (G_OBJECT (info), ruleset_quark); + + if (!ruleset) + { + ruleset = pango_ot_ruleset_new (info); + + for (i = 0; i < G_N_ELEMENTS (scripts); i++) + { + PangoOTTag script_tag = FT_MAKE_TAG (scripts[i][0], scripts[i][1], scripts[i][2], scripts[i][3]); + guint script_index; + + + if (pango_ot_info_find_script (info, PANGO_OT_TABLE_GPOS, script_tag, &script_index)) + for (j = 0; j < G_N_ELEMENTS (gpos_features); j++) + { + PangoOTTag feature_tag = FT_MAKE_TAG (gpos_features[j][0], gpos_features[j][1], + gpos_features[j][2], gpos_features[j][3]); + guint feature_index; + + /* 0xffff means default language */ + if (pango_ot_info_find_feature (info, PANGO_OT_TABLE_GPOS, feature_tag, script_index, 0xffff,&feature_index)) + { + pango_ot_ruleset_add_feature (ruleset, PANGO_OT_TABLE_GPOS, feature_index, 0xffff); + } + } + + if (pango_ot_info_find_script (info, PANGO_OT_TABLE_GSUB, script_tag, &script_index)) + for (j = 0; j < G_N_ELEMENTS (gsub_features); j++) + { + PangoOTTag feature_tag = FT_MAKE_TAG (gsub_features[j][0], gsub_features[j][1], + gsub_features[j][2], gsub_features[j][3]); + guint feature_index; + + /* 0xffff means default language */ + if (pango_ot_info_find_feature (info, PANGO_OT_TABLE_GSUB, feature_tag, + script_index, 0xffff, &feature_index)) + { + pango_ot_ruleset_add_feature (ruleset, PANGO_OT_TABLE_GSUB, feature_index, 0xffff); + } + } + } + + g_object_set_qdata_full (G_OBJECT (info), ruleset_quark, ruleset, (GDestroyNotify) g_object_unref); + } + + return ruleset; + +} + +static void +basic_engine_shape (PangoEngineShape *engine, + PangoFont *font, + const char *text, + gint length, + PangoAnalysis *analysis, + PangoGlyphString *glyphs) +{ + PangoFcFont *fc_font = PANGO_FC_FONT (font); + FT_Face face; + PangoOTRuleset *ruleset; + PangoOTBuffer *buffer; + gint unknown_property = 0; + int n_chars; + int i; + const char *p; + + g_return_if_fail (font != NULL); + g_return_if_fail (text != NULL); + g_return_if_fail (length >= 0); + g_return_if_fail (analysis != NULL); + + n_chars = g_utf8_strlen (text, length); + pango_glyph_string_set_size (glyphs, n_chars); + + face = pango_fc_font_lock_face (fc_font); + g_assert (face != NULL); + + + ruleset = get_ruleset (face); + if (!ruleset) + { + fallback_shape (engine, font, text, length, analysis, glyphs); + pango_fc_font_kern_glyphs (fc_font, glyphs); + goto out; + } + + buffer = pango_ot_buffer_new (fc_font); + pango_ot_buffer_set_rtl (buffer, analysis->level % 2 != 0); + + p = text; + for (i=0; i < n_chars; i++) + { + gunichar wc; + gunichar mirrored_ch; + PangoGlyph index; + char buf[6]; + const char *input; + int cluster = 0; + + wc = g_utf8_get_char (p); + input = p; + if (analysis->level % 2) + if (pango_get_mirror_char (wc, &mirrored_ch)) + { + wc = mirrored_ch; + + g_unichar_to_utf8 (wc, buf); + input = buf; + } + + index = pango_fc_font_get_glyph (fc_font, wc); - /* Now reorder glyphs within each cluster back to LTR */ - for (start = 0; start < n_chars;) + if (!index) { - end = start; - while (end < n_chars && - glyphs->log_clusters[end] == glyphs->log_clusters[start]) - end++; + pango_ot_buffer_add_glyph (buffer, pango_fc_font_get_unknown_glyph (fc_font, wc), + unknown_property, p - text); + } + else + { + cluster = p - text; - swap_range (glyphs, start, end); - start = end; + pango_ot_buffer_add_glyph (buffer, index, + unknown_property, cluster); } + + p = g_utf8_next_char (p); } - pango_fc_font_kern_glyphs (fc_font, glyphs); + pango_ot_ruleset_substitute (ruleset, buffer); + pango_ot_ruleset_position (ruleset, buffer); + pango_ot_buffer_output (buffer, glyphs); + + pango_ot_buffer_destroy (buffer); + +out: pango_fc_font_unlock_face (fc_font); } diff --git a/modules/syriac/syriac-fc.c b/modules/syriac/syriac-fc.c index 926d486e..82270309 100644 --- a/modules/syriac/syriac-fc.c +++ b/modules/syriac/syriac-fc.c @@ -180,8 +180,7 @@ fallback_shape (PangoEngineShape *engine, PangoGlyphString *glyphs) { PangoFcFont *fc_font = PANGO_FC_FONT (font); - glong n_chars; - gunichar *wcs = g_utf8_to_ucs4_fast (text, length, &n_chars); + glong n_chars = g_utf8_strlen (text, length); const char *p; int i; @@ -239,8 +238,6 @@ fallback_shape (PangoEngineShape *engine, /* Swap all glyphs */ swap_range (glyphs, 0, glyphs->num_glyphs); } - - g_free (wcs); } static void @@ -287,6 +284,8 @@ syriac_engine_shape (PangoEngineShape *engine, properties = g_new0 (gulong, n_chars); syriac_assign_properties (wcs, properties, n_chars); + + g_free (wcs); p = text; for (i=0; i < n_chars; i++) @@ -331,7 +330,6 @@ syriac_engine_shape (PangoEngineShape *engine, pango_ot_ruleset_position (ruleset, buffer); pango_ot_buffer_output (buffer, glyphs); - g_free (wcs); g_free (properties); pango_ot_buffer_destroy (buffer); diff --git a/pango/opentype/pango-ot-ruleset.c b/pango/opentype/pango-ot-ruleset.c index bfba00cb..1049c539 100644 --- a/pango/opentype/pango-ot-ruleset.c +++ b/pango/opentype/pango-ot-ruleset.c @@ -115,10 +115,10 @@ pango_ot_ruleset_new (PangoOTInfo *info) * @ruleset: a #PangoOTRuleset. * @table_type: the table type to add a feature to. * @feature_index: the index of the feature to add. - * @property_bit: the property bit to use for this feature. + * @property_bit: the property bit to use for this feature. Used to identify + * the glyphs that this feature should be applied to. * - * Adds a feature to the ruleset. See pango_ot_ruleset_shape() - * for an explanation of @property_bit. + * Adds a feature to the ruleset. **/ void pango_ot_ruleset_add_feature (PangoOTRuleset *ruleset, |