Nikolay Sivov : dwrite/shaping: Merge extension subtables handling with existing helper.
Module: wine Branch: master Commit: 240567a8b3858c67b32f2146a190cf2abbb8bc1f URL: https://source.winehq.org/git/wine.git/?a=commit;h=240567a8b3858c67b32f2146a... Author: Nikolay Sivov <nsivov(a)codeweavers.com> Date: Wed Dec 2 14:44:01 2020 +0300 dwrite/shaping: Merge extension subtables handling with existing helper. Signed-off-by: Nikolay Sivov <nsivov(a)codeweavers.com> Signed-off-by: Alexandre Julliard <julliard(a)winehq.org> --- dlls/dwrite/opentype.c | 103 +++++++++++++++++++++---------------------------- 1 file changed, 43 insertions(+), 60 deletions(-) diff --git a/dlls/dwrite/opentype.c b/dlls/dwrite/opentype.c index 68da6e4ecfb..1cf47e5ac69 100644 --- a/dlls/dwrite/opentype.c +++ b/dlls/dwrite/opentype.c @@ -3499,13 +3499,46 @@ static void opentype_layout_apply_gpos_value(struct scriptshaping_context *conte } } +struct lookup +{ + unsigned short index; + unsigned short type; + unsigned short flags; + unsigned short subtable_count; + + unsigned int mask; + unsigned int offset; +}; + static unsigned int opentype_layout_get_gsubgpos_subtable(const struct scriptshaping_context *context, - unsigned int lookup_offset, unsigned int subtable) + const struct lookup *lookup, unsigned int subtable, unsigned int *lookup_type) { - unsigned int subtable_offset = table_read_be_word(&context->table->table, lookup_offset + + unsigned int subtable_offset = table_read_be_word(&context->table->table, lookup->offset + FIELD_OFFSET(struct ot_lookup_table, subtable[subtable])); + const struct ot_gsubgpos_extension_format1 *format1; + + subtable_offset += lookup->offset; + + if ((context->table == &context->cache->gsub && lookup->type != GSUB_LOOKUP_EXTENSION_SUBST) || + (context->table == &context->cache->gpos && lookup->type != GPOS_LOOKUP_EXTENSION_POSITION)) + { + *lookup_type = lookup->type; + return subtable_offset; + } + + *lookup_type = 0; + + if (!(format1 = table_read_ensure(&context->table->table, subtable_offset, sizeof(*format1)))) + return 0; + + if (GET_BE_WORD(format1->format) != 1) + { + WARN("Unexpected extension table format %#x.\n", format1->format); + return 0; + } - return lookup_offset + subtable_offset; + *lookup_type = GET_BE_WORD(format1->lookup_type); + return subtable_offset + GET_BE_DWORD(format1->extension_offset); } struct ot_lookup @@ -3715,17 +3748,6 @@ static BOOL glyph_iterator_prev(struct glyph_iterator *iter) return FALSE; } -struct lookup -{ - unsigned short index; - unsigned short type; - unsigned short flags; - unsigned short subtable_count; - - unsigned int mask; - unsigned int offset; -}; - static BOOL opentype_layout_apply_gpos_single_adjustment(struct scriptshaping_context *context, const struct lookup *lookup, unsigned int subtable_offset) { @@ -4247,31 +4269,6 @@ static BOOL opentype_layout_apply_gpos_mark_to_mark_attachment(struct scriptshap return TRUE; } -static unsigned int opentype_layout_adjust_extension_subtable(struct scriptshaping_context *context, - unsigned int *subtable_offset, const struct lookup *lookup) -{ - const struct ot_gsubgpos_extension_format1 *format1; - - if ((context->table == &context->cache->gsub && lookup->type != GSUB_LOOKUP_EXTENSION_SUBST) || - (context->table == &context->cache->gpos && lookup->type != GPOS_LOOKUP_EXTENSION_POSITION)) - { - return lookup->type; - } - - if (!(format1 = table_read_ensure(&context->table->table, *subtable_offset, sizeof(*format1)))) - return 0; - - if (GET_BE_WORD(format1->format) != 1) - { - WARN("Unexpected extension table format %#x.\n", format1->format); - return 0; - } - - *subtable_offset = *subtable_offset + GET_BE_DWORD(format1->extension_offset); - - return GET_BE_WORD(format1->lookup_type); -} - static BOOL opentype_layout_apply_context(struct scriptshaping_context *context, const struct lookup *lookup, unsigned int subtable_offset); static BOOL opentype_layout_apply_chain_context(struct scriptshaping_context *context, const struct lookup *lookup, @@ -4284,9 +4281,7 @@ static BOOL opentype_layout_apply_gpos_lookup(struct scriptshaping_context *cont for (i = 0; i < lookup->subtable_count; ++i) { - unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i); - - lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset, lookup); + unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup, i, &lookup_type); switch (lookup_type) { @@ -5595,9 +5590,7 @@ static BOOL opentype_layout_apply_gsub_lookup(struct scriptshaping_context *cont for (i = 0; i < lookup->subtable_count; ++i) { - unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i); - - lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset, lookup); + unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup, i, &lookup_type); switch (lookup_type) { @@ -5740,14 +5733,9 @@ static void opentype_get_nominal_glyphs(struct scriptshaping_context *context, c static BOOL opentype_is_gsub_lookup_reversed(const struct scriptshaping_context *context, const struct lookup *lookup) { - unsigned int subtable_offset, lookup_type = lookup->type; + unsigned int lookup_type; - if (lookup->type == GSUB_LOOKUP_EXTENSION_SUBST) - { - subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, 0); - /* Assumes format 1. */ - lookup_type = table_read_be_word(&context->table->table, subtable_offset + 2); - } + opentype_layout_get_gsubgpos_subtable(context, lookup, 0, &lookup_type); return lookup_type == GSUB_LOOKUP_REVERSE_CHAINING_CONTEXTUAL_SUBST; } @@ -5914,9 +5902,7 @@ static BOOL opentype_layout_gsub_lookup_is_glyph_covered(struct scriptshaping_co for (i = 0; i < lookup->subtable_count; ++i) { - unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i); - - lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset, lookup); + unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup, i, &lookup_type); format = table_read_be_word(gsub, subtable_offset); @@ -5981,9 +5967,7 @@ static BOOL opentype_layout_gpos_lookup_is_glyph_covered(struct scriptshaping_co for (i = 0; i < lookup->subtable_count; ++i) { - unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i); - - lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset, lookup); + unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup, i, &lookup_type); format = table_read_be_word(gpos, subtable_offset); @@ -6104,8 +6088,7 @@ BOOL opentype_has_vertical_variants(struct dwrite_fontface *fontface) for (j = 0; j < lookup->subtable_count && !count; ++j) { - subtable_offset = opentype_layout_get_gsubgpos_subtable(&context, lookup->offset, j); - lookup_type = opentype_layout_adjust_extension_subtable(&context, &subtable_offset, lookup); + subtable_offset = opentype_layout_get_gsubgpos_subtable(&context, lookup, j, &lookup_type); if (lookup_type != GSUB_LOOKUP_SINGLE_SUBST) continue;
participants (1)
-
Alexandre Julliard