Aric Stewart : usp10: Implement GPOS Coverage-based Chaining Context Glyph Positioning.
Alexandre Julliard
julliard at winehq.org
Tue Jul 17 11:05:35 CDT 2012
Module: wine
Branch: master
Commit: 6ae4cfe973612550e923899bb462133722ced3af
URL: http://source.winehq.org/git/wine.git/?a=commit;h=6ae4cfe973612550e923899bb462133722ced3af
Author: Aric Stewart <aric at codeweavers.com>
Date: Tue Jul 17 07:21:37 2012 -0500
usp10: Implement GPOS Coverage-based Chaining Context Glyph Positioning.
---
dlls/usp10/opentype.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 125 insertions(+), 0 deletions(-)
diff --git a/dlls/usp10/opentype.c b/dlls/usp10/opentype.c
index fcdc9a4..cc57f65 100644
--- a/dlls/usp10/opentype.c
+++ b/dlls/usp10/opentype.c
@@ -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));
}
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