Module: wine Branch: master Commit: 7254a0ab4c1830efecde4aa4771719b46441515b URL: http://source.winehq.org/git/wine.git/?a=commit;h=7254a0ab4c1830efecde4aa477...
Author: Aric Stewart aric@codeweavers.com Date: Wed Jan 9 13:48:59 2013 -0600
usp10: Implement GPOS MarkToLigature Attachment Positioning Subtable.
---
dlls/usp10/opentype.c | 127 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 127 insertions(+), 0 deletions(-)
diff --git a/dlls/usp10/opentype.c b/dlls/usp10/opentype.c index c215e39..cb9832d 100644 --- a/dlls/usp10/opentype.c +++ b/dlls/usp10/opentype.c @@ -404,6 +404,29 @@ typedef struct {
typedef struct { WORD PosFormat; + WORD MarkCoverage; + WORD LigatureCoverage; + WORD ClassCount; + WORD MarkArray; + WORD LigatureArray; +} GPOS_MarkLigPosFormat1; + +typedef struct { + WORD LigatureCount; + WORD LigatureAttach[1]; +} GPOS_LigatureArray; + +typedef struct { + WORD LigatureAnchor[1]; +} GPOS_ComponentRecord; + +typedef struct { + WORD ComponentCount; + GPOS_ComponentRecord ComponentRecord[1]; +} GPOS_LigatureAttach; + +typedef struct { + WORD PosFormat; WORD Mark1Coverage; WORD Mark2Coverage; WORD ClassCount; @@ -1369,6 +1392,97 @@ static VOID GPOS_apply_MarkToBase(const OT_LookupTable *look, const WORD *glyphs } }
+static VOID GPOS_apply_MarkToLigature(const OT_LookupTable *look, const WORD *glyphs, INT glyph_index, INT write_dir, INT glyph_count, INT ppem, LPPOINT pt) +{ + int j; + + TRACE("MarkToLigature Attachment Positioning Subtable\n"); + + for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++) + { + int offset; + const GPOS_MarkLigPosFormat1 *mlpf1; + offset = GET_BE_WORD(look->SubTable[j]); + mlpf1 = (const GPOS_MarkLigPosFormat1*)((const BYTE*)look+offset); + if (GET_BE_WORD(mlpf1->PosFormat) == 1) + { + int offset = GET_BE_WORD(mlpf1->MarkCoverage); + int mark_index; + mark_index = GSUB_is_glyph_covered((const BYTE*)mlpf1+offset, glyphs[glyph_index]); + if (mark_index != -1) + { + int ligature_index; + offset = GET_BE_WORD(mlpf1->LigatureCoverage); + ligature_index = GSUB_is_glyph_covered((const BYTE*)mlpf1+offset, glyphs[glyph_index - write_dir]); + if (ligature_index != -1) + { + const GPOS_MarkArray *ma; + const GPOS_MarkRecord *mr; + + const GPOS_LigatureArray *la; + const GPOS_LigatureAttach *lt; + int mark_class; + int class_count = GET_BE_WORD(mlpf1->ClassCount); + int component_count; + int component_size; + int i; + POINT ligature_pt; + POINT mark_pt; + + TRACE("Mark %x(%i) and ligature %x(%i)\n",glyphs[glyph_index], mark_index, glyphs[glyph_index - write_dir], ligature_index); + offset = GET_BE_WORD(mlpf1->MarkArray); + ma = (const GPOS_MarkArray*)((const BYTE*)mlpf1 + offset); + if (mark_index > GET_BE_WORD(ma->MarkCount)) + { + ERR("Mark index exeeded mark count\n"); + return; + } + mr = &ma->MarkRecord[mark_index]; + mark_class = GET_BE_WORD(mr->Class); + TRACE("Mark Class %i total classes %i\n",mark_class,class_count); + offset = GET_BE_WORD(mlpf1->LigatureArray); + la = (const GPOS_LigatureArray*)((const BYTE*)mlpf1 + offset); + if (ligature_index > GET_BE_WORD(la->LigatureCount)) + { + ERR("Ligature index exeeded ligature count\n"); + return; + } + offset = GET_BE_WORD(la->LigatureAttach[ligature_index]); + lt = (const GPOS_LigatureAttach*)((const BYTE*)la + offset); + + component_count = GET_BE_WORD(lt->ComponentCount); + component_size = class_count * sizeof(WORD); + offset = 0; + for (i = 0; i < component_count && !offset; i++) + { + int k; + const GPOS_ComponentRecord *cr = (const GPOS_ComponentRecord*)((const BYTE*)lt->ComponentRecord + (component_size * i)); + for (k = 0; k < class_count && !offset; k++) + offset = GET_BE_WORD(cr->LigatureAnchor[k]); + cr = (const GPOS_ComponentRecord*)((const BYTE*)cr + component_size); + } + if (!offset) + { + ERR("Failed to find avalible ligature connection point\n"); + return; + } + + GPOS_get_anchor_values((const BYTE*)lt + offset, &ligature_pt, ppem); + offset = GET_BE_WORD(mr->MarkAnchor); + GPOS_get_anchor_values((const BYTE*)ma + offset, &mark_pt, ppem); + TRACE("Offset on ligature is %i,%i design units\n",ligature_pt.x,ligature_pt.y); + TRACE("Offset on mark is %i,%i design units\n",mark_pt.x, mark_pt.y); + pt->x += ligature_pt.x - mark_pt.x; + pt->y += ligature_pt.y - mark_pt.y; + TRACE("Resulting cumulative offset is %i,%i design units\n",pt->x,pt->y); + } + } + } + else + FIXME("Unhandled Mark To Ligature Format %i\n",GET_BE_WORD(mlpf1->PosFormat)); + } +} + static VOID GPOS_apply_MarkToMark(const OT_LookupTable *look, const WORD *glyphs, INT glyph_index, INT write_dir, INT glyph_count, INT ppem, LPPOINT pt) { int j; @@ -1606,6 +1720,19 @@ static INT GPOS_apply_lookup(LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, I } break; } + case 5: + { + double devX, devY; + POINT desU = {0,0}; + GPOS_apply_MarkToLigature(look, glyphs, glyph_index, write_dir, glyph_count, ppem, &desU); + if (desU.x || desU.y) + { + GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY); + pGoffset[glyph_index].du += (round(devX) - piAdvance[glyph_index-1]); + pGoffset[glyph_index].dv += round(devY); + } + break; + } case 6: { double devX, devY;