dwrite: Implement CheckTypographicFeature().
Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov
Alexandre Julliard
parent
19e9b819f7
commit
b4b33e13d2
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@ -1787,12 +1787,33 @@ static HRESULT WINAPI dwritetextanalyzer2_GetTypographicFeatures(IDWriteTextAnal
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};
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static HRESULT WINAPI dwritetextanalyzer2_CheckTypographicFeature(IDWriteTextAnalyzer2 *iface,
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IDWriteFontFace *face, DWRITE_SCRIPT_ANALYSIS sa, const WCHAR *locale, DWRITE_FONT_FEATURE_TAG feature,
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IDWriteFontFace *fontface, DWRITE_SCRIPT_ANALYSIS sa, const WCHAR *locale, DWRITE_FONT_FEATURE_TAG feature,
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UINT32 glyph_count, const UINT16 *glyphs, UINT8 *feature_applies)
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{
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FIXME("(%p %u %s %s %u %p %p): stub\n", face, sa.script, debugstr_w(locale), debugstr_tag(feature), glyph_count,
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glyphs, feature_applies);
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return E_NOTIMPL;
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struct scriptshaping_context context = { 0 };
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const struct dwritescript_properties *props;
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struct dwrite_fontface *font_obj;
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HRESULT hr;
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TRACE("%p, %p, %u, %s, %s, %u, %p, %p.\n", iface, fontface, sa.script, debugstr_w(locale), debugstr_tag(feature),
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glyph_count, glyphs, feature_applies);
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if (sa.script > Script_LastId)
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return E_INVALIDARG;
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font_obj = unsafe_impl_from_IDWriteFontFace(fontface);
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context.cache = fontface_get_shaping_cache(font_obj);
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context.language_tag = get_opentype_language(locale);
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context.glyph_infos = heap_calloc(glyph_count, sizeof(*context.glyph_infos));
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props = &dwritescripts_properties[sa.script];
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hr = shape_check_typographic_feature(&context, props->scripttags, feature, glyph_count, glyphs, feature_applies);
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heap_free(context.glyph_infos);
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return hr;
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}
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static const struct IDWriteTextAnalyzer2Vtbl textanalyzervtbl = {
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@ -591,8 +591,13 @@ extern void opentype_layout_apply_gsub_features(struct scriptshaping_context *co
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unsigned int language_index, const struct shaping_features *features) DECLSPEC_HIDDEN;
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extern void opentype_layout_apply_gpos_features(struct scriptshaping_context *context, unsigned int script_index,
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unsigned int language_index, const struct shaping_features *features) DECLSPEC_HIDDEN;
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extern BOOL opentype_layout_check_feature(struct scriptshaping_context *context, unsigned int script_index,
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unsigned int language_index, struct shaping_feature *feature, unsigned int glyph_count,
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const UINT16 *glyphs, UINT8 *feature_applies) DECLSPEC_HIDDEN;
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extern HRESULT shape_get_glyphs(struct scriptshaping_context *context, const unsigned int *scripts) DECLSPEC_HIDDEN;
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extern HRESULT shape_get_positions(struct scriptshaping_context *context, const unsigned int *scripts) DECLSPEC_HIDDEN;
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extern HRESULT shape_get_typographic_features(struct scriptshaping_context *context, const unsigned int *scripts,
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unsigned int max_tagcount, unsigned int *actual_tagcount, unsigned int *tags) DECLSPEC_HIDDEN;
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extern HRESULT shape_check_typographic_feature(struct scriptshaping_context *context, const unsigned int *scripts,
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unsigned int tag, unsigned int glyph_count, const UINT16 *glyphs, UINT8 *feature_applies) DECLSPEC_HIDDEN;
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@ -5732,3 +5732,252 @@ void opentype_layout_apply_gsub_features(struct scriptshaping_context *context,
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heap_free(lookups.lookups);
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}
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static BOOL opentype_layout_contextual_lookup_is_glyph_covered(struct scriptshaping_context *context, UINT16 glyph,
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unsigned int subtable_offset, unsigned int coverage, unsigned int format)
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{
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const struct dwrite_fonttable *table = &context->table->table;
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const UINT16 *offsets;
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unsigned int count;
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if (format == 1 || format == 2)
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{
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if (opentype_layout_is_glyph_covered(table, subtable_offset + coverage, glyph) != GLYPH_NOT_COVERED)
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return TRUE;
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}
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else if (format == 3)
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{
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count = table_read_be_word(table, subtable_offset + 2);
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if (!count || !(offsets = table_read_ensure(table, subtable_offset + 6, count * sizeof(*offsets))))
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return FALSE;
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if (opentype_layout_is_glyph_covered(table, subtable_offset + GET_BE_WORD(offsets[0]), glyph) != GLYPH_NOT_COVERED)
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return TRUE;
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}
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return FALSE;
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}
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static BOOL opentype_layout_chain_contextual_lookup_is_glyph_covered(struct scriptshaping_context *context, UINT16 glyph,
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unsigned int subtable_offset, unsigned int coverage, unsigned int format)
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{
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const struct dwrite_fonttable *table = &context->table->table;
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unsigned int count, backtrack_count;
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const UINT16 *offsets;
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if (format == 1 || format == 2)
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{
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if (opentype_layout_is_glyph_covered(table, subtable_offset + coverage, glyph) != GLYPH_NOT_COVERED)
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return TRUE;
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}
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else if (format == 3)
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{
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backtrack_count = table_read_be_word(table, subtable_offset + 2);
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count = table_read_be_word(table, subtable_offset + 4 + backtrack_count * sizeof(*offsets));
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if (!count || !(offsets = table_read_ensure(table, subtable_offset + 6 + backtrack_count * sizeof(*offsets),
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count * sizeof(*offsets))))
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return FALSE;
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if (opentype_layout_is_glyph_covered(table, subtable_offset + GET_BE_WORD(offsets[0]), glyph) != GLYPH_NOT_COVERED)
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return TRUE;
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}
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return FALSE;
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}
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static BOOL opentype_layout_gsub_lookup_is_glyph_covered(struct scriptshaping_context *context, UINT16 glyph,
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const struct lookup *lookup)
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{
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const struct dwrite_fonttable *gsub = &context->table->table;
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static const unsigned short gsub_formats[] =
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{
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0, /* Unused */
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1, /* SingleSubst */
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1, /* MultipleSubst */
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1, /* AlternateSubst */
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1, /* LigatureSubst */
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3, /* ContextSubst */
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3, /* ChainContextSubst */
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0, /* Extension, unused */
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1, /* ReverseChainSubst */
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};
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unsigned int i, coverage, lookup_type, format;
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for (i = 0; i < lookup->subtable_count; ++i)
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{
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unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i);
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if (lookup->type == GSUB_LOOKUP_EXTENSION_SUBST)
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{
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lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset);
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if (!lookup_type)
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continue;
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}
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else
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lookup_type = lookup->type;
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format = table_read_be_word(gsub, subtable_offset);
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if (!format || format > ARRAY_SIZE(gsub_formats) || format > gsub_formats[lookup_type])
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break;
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coverage = table_read_be_word(gsub, subtable_offset + 2);
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switch (lookup_type)
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{
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case GSUB_LOOKUP_SINGLE_SUBST:
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case GSUB_LOOKUP_MULTIPLE_SUBST:
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case GSUB_LOOKUP_ALTERNATE_SUBST:
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case GSUB_LOOKUP_LIGATURE_SUBST:
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case GSUB_LOOKUP_REVERSE_CHAINING_CONTEXTUAL_SUBST:
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if (opentype_layout_is_glyph_covered(gsub, subtable_offset + coverage, glyph) != GLYPH_NOT_COVERED)
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return TRUE;
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break;
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case GSUB_LOOKUP_CONTEXTUAL_SUBST:
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if (opentype_layout_contextual_lookup_is_glyph_covered(context, glyph, subtable_offset, coverage, format))
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return TRUE;
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break;
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case GSUB_LOOKUP_CHAINING_CONTEXTUAL_SUBST:
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if (opentype_layout_chain_contextual_lookup_is_glyph_covered(context, glyph, subtable_offset, coverage, format))
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return TRUE;
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break;
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default:
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WARN("Unknown lookup type %u.\n", lookup_type);
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}
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}
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return FALSE;
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}
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static BOOL opentype_layout_gpos_lookup_is_glyph_covered(struct scriptshaping_context *context, UINT16 glyph,
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const struct lookup *lookup)
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{
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const struct dwrite_fonttable *gpos = &context->table->table;
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static const unsigned short gpos_formats[] =
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{
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0, /* Unused */
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2, /* SinglePos */
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2, /* PairPos */
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1, /* CursivePos */
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1, /* MarkBasePos */
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1, /* MarkLigPos */
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1, /* MarkMarkPos */
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3, /* ContextPos */
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3, /* ChainContextPos */
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0, /* Extension, unused */
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};
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unsigned int i, coverage, lookup_type, format;
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for (i = 0; i < lookup->subtable_count; ++i)
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{
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unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i);
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if (lookup->type == GPOS_LOOKUP_EXTENSION_POSITION)
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{
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lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset);
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if (!lookup_type)
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continue;
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}
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else
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lookup_type = lookup->type;
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format = table_read_be_word(gpos, subtable_offset);
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if (!format || format > ARRAY_SIZE(gpos_formats) || format > gpos_formats[lookup_type])
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break;
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coverage = table_read_be_word(gpos, subtable_offset + 2);
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switch (lookup_type)
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{
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case GPOS_LOOKUP_SINGLE_ADJUSTMENT:
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case GPOS_LOOKUP_PAIR_ADJUSTMENT:
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case GPOS_LOOKUP_CURSIVE_ATTACHMENT:
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case GPOS_LOOKUP_MARK_TO_BASE_ATTACHMENT:
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case GPOS_LOOKUP_MARK_TO_LIGATURE_ATTACHMENT:
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case GPOS_LOOKUP_MARK_TO_MARK_ATTACHMENT:
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if (opentype_layout_is_glyph_covered(gpos, subtable_offset + coverage, glyph) != GLYPH_NOT_COVERED)
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return TRUE;
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break;
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case GPOS_LOOKUP_CONTEXTUAL_POSITION:
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if (opentype_layout_contextual_lookup_is_glyph_covered(context, glyph, subtable_offset, coverage, format))
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return TRUE;
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break;
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case GPOS_LOOKUP_CONTEXTUAL_CHAINING_POSITION:
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if (opentype_layout_chain_contextual_lookup_is_glyph_covered(context, glyph, subtable_offset, coverage, format))
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return TRUE;
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break;
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default:
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WARN("Unknown lookup type %u.\n", lookup_type);
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}
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}
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return FALSE;
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}
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typedef BOOL (*p_lookup_is_glyph_covered_func)(struct scriptshaping_context *context, UINT16 glyph, const struct lookup *lookup);
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BOOL opentype_layout_check_feature(struct scriptshaping_context *context, unsigned int script_index,
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unsigned int language_index, struct shaping_feature *feature, unsigned int glyph_count,
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const UINT16 *glyphs, UINT8 *feature_applies)
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{
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p_lookup_is_glyph_covered_func func_is_covered;
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struct shaping_features features = { 0 };
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struct lookups lookups = { 0 };
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BOOL ret = FALSE, is_covered;
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unsigned int i, j, applies;
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features.features = feature;
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features.count = 1;
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for (i = 0; i < context->glyph_count; ++i)
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opentype_set_glyph_props(context, i);
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opentype_layout_collect_lookups(context, script_index, language_index, &features, context->table, &lookups);
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func_is_covered = context->table == &context->cache->gsub ? opentype_layout_gsub_lookup_is_glyph_covered :
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opentype_layout_gpos_lookup_is_glyph_covered;
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for (i = 0; i < lookups.count; ++i)
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{
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struct lookup *lookup = &lookups.lookups[i];
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applies = 0;
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for (j = 0; j < context->glyph_count; ++j)
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{
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if (lookup_is_glyph_match(context, j, lookup->flags))
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{
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if ((is_covered = func_is_covered(context, glyphs[i], lookup)))
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++applies;
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feature_applies[j] |= is_covered;
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}
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}
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if ((ret = (applies == context->glyph_count)))
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break;
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}
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heap_free(lookups.lookups);
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return ret;
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}
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@ -350,3 +350,28 @@ HRESULT shape_get_typographic_features(struct scriptshaping_context *context, co
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return t.count <= max_tagcount ? S_OK : E_NOT_SUFFICIENT_BUFFER;
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}
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HRESULT shape_check_typographic_feature(struct scriptshaping_context *context, const unsigned int *scripts,
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unsigned int tag, unsigned int glyph_count, const UINT16 *glyphs, UINT8 *feature_applies)
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{
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static const unsigned int tables[] = { MS_GSUB_TAG, MS_GPOS_TAG };
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struct shaping_feature feature = { .tag = tag };
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unsigned int script_index, language_index;
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unsigned int i;
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memset(feature_applies, 0, glyph_count * sizeof(*feature_applies));
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for (i = 0; i < ARRAY_SIZE(tables); ++i)
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{
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shape_get_script_lang_index(context, scripts, tables[i], &script_index, &language_index);
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context->table = tables[i] == MS_GSUB_TAG ? &context->cache->gsub : &context->cache->gpos;
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/* Skip second table if feature applies to all. */
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if (opentype_layout_check_feature(context, script_index, language_index, &feature, glyph_count,
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glyphs, feature_applies))
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{
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break;
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}
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}
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return S_OK;
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}
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