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dwrite/shaping: Merge extension subtables handling with existing helper. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov 2020-12-02 14:44:01 +03:00 committed by Alexandre Julliard
parent 810a2f0be2
commit 240567a8b3
1 changed files with 45 additions and 62 deletions
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107
dlls/dwrite/opentype.c
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@ -3499,13 +3499,46 @@ static void opentype_layout_apply_gpos_value(struct scriptshaping_context *conte
} }
} }
static unsigned int opentype_layout_get_gsubgpos_subtable(const struct scriptshaping_context *context, struct lookup
unsigned int lookup_offset, unsigned int subtable)
{ {
unsigned int subtable_offset = table_read_be_word(&context->table->table, lookup_offset + unsigned short index;
FIELD_OFFSET(struct ot_lookup_table, subtable[subtable])); unsigned short type;
unsigned short flags;
unsigned short subtable_count;
return lookup_offset + subtable_offset; unsigned int mask;
unsigned int offset;
};
static unsigned int opentype_layout_get_gsubgpos_subtable(const struct scriptshaping_context *context,
const struct lookup *lookup, unsigned int subtable, unsigned int *lookup_type)
{
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;
}
*lookup_type = GET_BE_WORD(format1->lookup_type);
return subtable_offset + GET_BE_DWORD(format1->extension_offset);
} }
struct ot_lookup struct ot_lookup
@ -3715,17 +3748,6 @@ static BOOL glyph_iterator_prev(struct glyph_iterator *iter)
return FALSE; 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, static BOOL opentype_layout_apply_gpos_single_adjustment(struct scriptshaping_context *context,
const struct lookup *lookup, unsigned int subtable_offset) 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; 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, static BOOL opentype_layout_apply_context(struct scriptshaping_context *context, const struct lookup *lookup,
unsigned int subtable_offset); unsigned int subtable_offset);
static BOOL opentype_layout_apply_chain_context(struct scriptshaping_context *context, const struct lookup *lookup, 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) for (i = 0; i < lookup->subtable_count; ++i)
{ {
unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i); unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup, i, &lookup_type);
lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset, lookup);
switch (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) for (i = 0; i < lookup->subtable_count; ++i)
{ {
unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i); unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup, i, &lookup_type);
lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset, lookup);
switch (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) 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) opentype_layout_get_gsubgpos_subtable(context, lookup, 0, &lookup_type);
{
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);
}
return lookup_type == GSUB_LOOKUP_REVERSE_CHAINING_CONTEXTUAL_SUBST; 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) for (i = 0; i < lookup->subtable_count; ++i)
{ {
unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i); unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup, i, &lookup_type);
lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset, lookup);
format = table_read_be_word(gsub, subtable_offset); 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) for (i = 0; i < lookup->subtable_count; ++i)
{ {
unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup->offset, i); unsigned int subtable_offset = opentype_layout_get_gsubgpos_subtable(context, lookup, i, &lookup_type);
lookup_type = opentype_layout_adjust_extension_subtable(context, &subtable_offset, lookup);
format = table_read_be_word(gpos, subtable_offset); 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) for (j = 0; j < lookup->subtable_count && !count; ++j)
{ {
subtable_offset = opentype_layout_get_gsubgpos_subtable(&context, lookup->offset, j); subtable_offset = opentype_layout_get_gsubgpos_subtable(&context, lookup, j, &lookup_type);
lookup_type = opentype_layout_adjust_extension_subtable(&context, &subtable_offset, lookup);
if (lookup_type != GSUB_LOOKUP_SINGLE_SUBST) if (lookup_type != GSUB_LOOKUP_SINGLE_SUBST)
continue; continue;