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usp10: Handle GSUB SubType 7: Extension Substitution. 

Signed-off-by: Aric Stewart <aric@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Aric Stewart 2016-02-12 11:24:05 -06:00 committed by Alexandre Julliard
parent c6a7284924
commit 12fb74ac56
1 changed files with 58 additions and 15 deletions
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73
dlls/usp10/opentype.c
View File

@ -277,6 +277,12 @@ typedef struct{
WORD Alternate[1];
} GSUB_AlternateSet;
typedef struct {
WORD SubstFormat;
WORD ExtensionLookupType;
DWORD ExtensionOffset;
} GSUB_ExtensionPosFormat1;
/* These are all structures needed for the GPOS table */
typedef struct {
@ -725,6 +731,25 @@ static INT GSUB_is_glyph_covered(LPCVOID table , UINT glyph)
return -1;
}
static const BYTE *GSUB_get_subtable(const OT_LookupTable *look, int index)
{
int offset = GET_BE_WORD(look->SubTable[index]);
if (GET_BE_WORD(look->LookupType) == 7)
{
const GSUB_ExtensionPosFormat1 *ext = (const GSUB_ExtensionPosFormat1 *)((const BYTE *)look + offset);
if (GET_BE_WORD(ext->SubstFormat) == 1)
{
offset += GET_BE_DWORD(ext->ExtensionOffset);
}
else
{
FIXME("Unhandled Extension Substitution Format %i\n",GET_BE_WORD(ext->SubstFormat));
}
}
return (const BYTE *)look + offset;
}
static INT GSUB_apply_SingleSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
{
int j;
@ -732,10 +757,7 @@ static INT GSUB_apply_SingleSubst(const OT_LookupTable *look, WORD *glyphs, INT
for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
{
int offset;
const GSUB_SingleSubstFormat1 *ssf1;
offset = GET_BE_WORD(look->SubTable[j]);
ssf1 = (const GSUB_SingleSubstFormat1*)((const BYTE*)look+offset);
const GSUB_SingleSubstFormat1 *ssf1 = (const GSUB_SingleSubstFormat1*)GSUB_get_subtable(look, j);
if (GET_BE_WORD(ssf1->SubstFormat) == 1)
{
int offset = GET_BE_WORD(ssf1->Coverage);
@ -783,8 +805,7 @@ static INT GSUB_apply_MultipleSubst(const OT_LookupTable *look, WORD *glyphs, IN
{
int offset, index;
const GSUB_MultipleSubstFormat1 *msf1;
offset = GET_BE_WORD(look->SubTable[j]);
msf1 = (const GSUB_MultipleSubstFormat1*)((const BYTE*)look+offset);
msf1 = (const GSUB_MultipleSubstFormat1*)GSUB_get_subtable(look, j);
offset = GET_BE_WORD(msf1->Coverage);
index = GSUB_is_glyph_covered((const BYTE*)msf1+offset, glyphs[glyph_index]);
@ -833,8 +854,7 @@ static INT GSUB_apply_AlternateSubst(const OT_LookupTable *look, WORD *glyphs, I
const GSUB_AlternateSubstFormat1 *asf1;
INT index;
offset = GET_BE_WORD(look->SubTable[j]);
asf1 = (const GSUB_AlternateSubstFormat1*)((const BYTE*)look+offset);
asf1 = (const GSUB_AlternateSubstFormat1*)GSUB_get_subtable(look, j);
offset = GET_BE_WORD(asf1->Coverage);
index = GSUB_is_glyph_covered((const BYTE*)asf1+offset, glyphs[glyph_index]);
@ -866,8 +886,7 @@ static INT GSUB_apply_LigatureSubst(const OT_LookupTable *look, WORD *glyphs, IN
const GSUB_LigatureSubstFormat1 *lsf1;
int offset,index;
offset = GET_BE_WORD(look->SubTable[j]);
lsf1 = (const GSUB_LigatureSubstFormat1*)((const BYTE*)look+offset);
lsf1 = (const GSUB_LigatureSubstFormat1*)GSUB_get_subtable(look, j);
offset = GET_BE_WORD(lsf1->Coverage);
index = GSUB_is_glyph_covered((const BYTE*)lsf1+offset, glyphs[glyph_index]);
TRACE(" Coverage index %i\n",index);
@ -933,8 +952,7 @@ static INT GSUB_apply_ChainContextSubst(const OT_LookupList* lookup, const OT_Lo
int dirLookahead = write_dir;
int dirBacktrack = -1 * write_dir;
offset = GET_BE_WORD(look->SubTable[j]);
ccsf1 = (const GSUB_ChainContextSubstFormat1*)((const BYTE*)look+offset);
ccsf1 = (const GSUB_ChainContextSubstFormat1*)GSUB_get_subtable(look, j);
if (GET_BE_WORD(ccsf1->SubstFormat) == 1)
{
static int once;
@ -1029,12 +1047,34 @@ static INT GSUB_apply_ChainContextSubst(const OT_LookupList* lookup, const OT_Lo
static INT GSUB_apply_lookup(const OT_LookupList* lookup, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
{
int offset;
int type;
const OT_LookupTable *look;
offset = GET_BE_WORD(lookup->Lookup[lookup_index]);
look = (const OT_LookupTable*)((const BYTE*)lookup + offset);
TRACE("type %i, flag %x, subtables %i\n",GET_BE_WORD(look->LookupType),GET_BE_WORD(look->LookupFlag),GET_BE_WORD(look->SubTableCount));
switch(GET_BE_WORD(look->LookupType))
type = GET_BE_WORD(look->LookupType);
TRACE("type %i, flag %x, subtables %i\n",type,GET_BE_WORD(look->LookupFlag),GET_BE_WORD(look->SubTableCount));
if (type == 7)
{
if (GET_BE_WORD(look->SubTableCount))
{
const GSUB_ExtensionPosFormat1 *ext = (const GSUB_ExtensionPosFormat1 *)((const BYTE *)look + GET_BE_WORD(look->SubTable[0]));
if (GET_BE_WORD(ext->SubstFormat) == 1)
{
type = GET_BE_WORD(ext->ExtensionLookupType);
TRACE("extension type %i\n",type);
}
else
{
FIXME("Unhandled Extension Substitution Format %i\n",GET_BE_WORD(ext->SubstFormat));
}
}
else
{
WARN("lookup type is Extension Substitution but no extension subtable exists\n");
}
}
switch(type)
{
case 1:
return GSUB_apply_SingleSubst(look, glyphs, glyph_index, write_dir, glyph_count);
@ -1046,8 +1086,11 @@ static INT GSUB_apply_lookup(const OT_LookupList* lookup, INT lookup_index, WORD
return GSUB_apply_LigatureSubst(look, glyphs, glyph_index, write_dir, glyph_count);
case 6:
return GSUB_apply_ChainContextSubst(lookup, look, glyphs, glyph_index, write_dir, glyph_count);
case 7:
FIXME("Extension Substitution types not valid here\n");
break;
default:
FIXME("We do not handle SubType %i\n",GET_BE_WORD(look->LookupType));
FIXME("We do not handle SubType %i\n",type);
}
return GSUB_E_NOGLYPH;
}