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usp10: Implement GPOS Coverage-based Chaining Context Glyph Positioning.

This commit is contained in:
Aric Stewart 2012-07-17 07:21:37 -05:00 committed by Alexandre Julliard
parent ea9f2266de
commit 6ae4cfe973
1 changed files with 125 additions and 0 deletions
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125
dlls/usp10/opentype.c
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@ -388,6 +388,32 @@ typedef struct {
GPOS_MarkRecord MarkRecord[1];
} GPOS_MarkArray;
typedef struct {
WORD SequenceIndex;
WORD LookupListIndex;
} GPOS_PosLookupRecord;
typedef struct {
WORD PosFormat;
WORD BacktrackGlyphCount;
WORD Coverage[1];
} GPOS_ChainContextPosFormat3_1;
typedef struct {
WORD InputGlyphCount;
WORD Coverage[1];
} GPOS_ChainContextPosFormat3_2;
typedef struct {
WORD LookaheadGlyphCount;
WORD Coverage[1];
} GPOS_ChainContextPosFormat3_3;
typedef struct {
WORD PosCount;
GPOS_PosLookupRecord PosLookupRecord[1];
} GPOS_ChainContextPosFormat3_4;
/**********
* CMAP
**********/
@ -974,6 +1000,8 @@ INT OpenType_apply_GSUB_lookup(LPCVOID table, INT lookup_index, WORD *glyphs, IN
/**********
* GPOS
**********/
static INT GPOS_apply_lookup(LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, INT* piAdvance, const OT_LookupList* lookup, INT lookup_index, const WORD *glyphs, INT glyph_index, INT write_dir, INT glyph_count, GOFFSET *pGoffset);
static INT GPOS_get_device_table_value(const OT_DeviceTable *DeviceTable, WORD ppem)
{
static const WORD mask[3] = {3,0xf,0xff};
@ -1259,6 +1287,99 @@ static VOID GPOS_apply_MarkToBase(const OT_LookupTable *look, const WORD *glyphs
}
}
static INT GPOS_apply_ChainContextPos(LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, INT* piAdvance, const OT_LookupList *lookup, const OT_LookupTable *look, const WORD *glyphs, INT glyph_index, INT write_dir, INT glyph_count, INT ppem, GOFFSET *pGoffset)
{
int j;
TRACE("Chaining Contextual Positioning Subtable\n");
for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
{
int offset;
const GPOS_ChainContextPosFormat3_1 *ccpf3;
int dirLookahead = write_dir;
int dirBacktrack = -1 * write_dir;
offset = GET_BE_WORD(look->SubTable[j]);
ccpf3 = (const GPOS_ChainContextPosFormat3_1*)((const BYTE*)look+offset);
if (GET_BE_WORD(ccpf3->PosFormat) == 1)
{
FIXME(" TODO: subtype 1 (Simple Chaining Context Glyph Positioning)\n");
continue;
}
else if (GET_BE_WORD(ccpf3->PosFormat) == 2)
{
FIXME(" TODO: subtype 2 (Class-based Chaining Context Glyph Positioning)\n");
continue;
}
else if (GET_BE_WORD(ccpf3->PosFormat) == 3)
{
int k;
int indexGlyphs;
const GPOS_ChainContextPosFormat3_2 *ccpf3_2;
const GPOS_ChainContextPosFormat3_3 *ccpf3_3;
const GPOS_ChainContextPosFormat3_4 *ccpf3_4;
TRACE(" subtype 3 (Coverage-based Chaining Context Glyph Positioning)\n");
for (k = 0; k < GET_BE_WORD(ccpf3->BacktrackGlyphCount); k++)
{
offset = GET_BE_WORD(ccpf3->Coverage[k]);
if (GSUB_is_glyph_covered((const BYTE*)ccpf3+offset, glyphs[glyph_index + (dirBacktrack * (k+1))]) == -1)
break;
}
if (k != GET_BE_WORD(ccpf3->BacktrackGlyphCount))
continue;
TRACE("Matched Backtrack\n");
ccpf3_2 = (const GPOS_ChainContextPosFormat3_2*)(((LPBYTE)ccpf3)+sizeof(GPOS_ChainContextPosFormat3_1) + (sizeof(WORD) * (GET_BE_WORD(ccpf3->BacktrackGlyphCount)-1)));
indexGlyphs = GET_BE_WORD(ccpf3_2->InputGlyphCount);
for (k = 0; k < indexGlyphs; k++)
{
offset = GET_BE_WORD(ccpf3_2->Coverage[k]);
if (GSUB_is_glyph_covered((const BYTE*)ccpf3+offset, glyphs[glyph_index + (write_dir * k)]) == -1)
break;
}
if (k != indexGlyphs)
continue;
TRACE("Matched IndexGlyphs\n");
ccpf3_3 = (const GPOS_ChainContextPosFormat3_3*)(((LPBYTE)ccpf3_2)+sizeof(GPOS_ChainContextPosFormat3_2) + (sizeof(WORD) * (GET_BE_WORD(ccpf3_2->InputGlyphCount)-1)));
for (k = 0; k < GET_BE_WORD(ccpf3_3->LookaheadGlyphCount); k++)
{
offset = GET_BE_WORD(ccpf3_3->Coverage[k]);
if (GSUB_is_glyph_covered((const BYTE*)ccpf3+offset, glyphs[glyph_index + (dirLookahead * (indexGlyphs + k))]) == -1)
break;
}
if (k != GET_BE_WORD(ccpf3_3->LookaheadGlyphCount))
continue;
TRACE("Matched LookAhead\n");
ccpf3_4 = (const GPOS_ChainContextPosFormat3_4*)(((LPBYTE)ccpf3_3)+sizeof(GPOS_ChainContextPosFormat3_3) + (sizeof(WORD) * (GET_BE_WORD(ccpf3_3->LookaheadGlyphCount)-1)));
if (GET_BE_WORD(ccpf3_4->PosCount))
{
for (k = 0; k < GET_BE_WORD(ccpf3_4->PosCount); k++)
{
int lookupIndex = GET_BE_WORD(ccpf3_4->PosLookupRecord[k].LookupListIndex);
int SequenceIndex = GET_BE_WORD(ccpf3_4->PosLookupRecord[k].SequenceIndex) * write_dir;
TRACE("Position: %i -> %i %i\n",k, SequenceIndex, lookupIndex);
GPOS_apply_lookup(lpotm, lplogfont, piAdvance, lookup, lookupIndex, glyphs, glyph_index + SequenceIndex, write_dir, glyph_count, pGoffset);
}
return glyph_index + indexGlyphs + GET_BE_WORD(ccpf3_3->LookaheadGlyphCount);
}
else return glyph_index + 1;
}
else
FIXME("Unhandled Chaining Contextual Positioning Format %i\n",GET_BE_WORD(ccpf3->PosFormat));
}
return glyph_index + 1;
}
static INT GPOS_apply_lookup(LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, INT* piAdvance, const OT_LookupList* lookup, INT lookup_index, const WORD *glyphs, INT glyph_index, INT write_dir, INT glyph_count, GOFFSET *pGoffset)
{
int offset;
@ -1334,6 +1455,10 @@ static INT GPOS_apply_lookup(LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, I
}
break;
}
case 8:
{
return GPOS_apply_ChainContextPos(lpotm, lplogfont, piAdvance, lookup, look, glyphs, glyph_index, write_dir, glyph_count, ppem, pGoffset);
}
default:
FIXME("We do not handle SubType %i\n",GET_BE_WORD(look->LookupType));
}