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usp10: Implement GPOS Cursive Attachment Positioning Subtable.

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Aric Stewart 2013-01-17 09:57:16 -06:00 committed by Alexandre Julliard
parent f4597120b1
commit 62b4f31d6d
1 changed files with 70 additions and 0 deletions
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70
dlls/usp10/opentype.c
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@ -374,6 +374,18 @@ typedef struct {
GPOS_PairValueRecord PairValueRecord[1];
} GPOS_PairSet;
typedef struct {
WORD EntryAnchor;
WORD ExitAnchor;
} GPOS_EntryExitRecord;
typedef struct {
WORD PosFormat;
WORD Coverage;
WORD EntryExitCount;
GPOS_EntryExitRecord EntryExitRecord[1];
} GPOS_CursivePosFormat1;
typedef struct {
WORD PosFormat;
WORD MarkCoverage;
@ -1333,6 +1345,49 @@ static INT GPOS_apply_PairAdjustment(const OT_LookupTable *look, const SCRIPT_AN
return glyph_index+1;
}
static VOID GPOS_apply_CursiveAttachment(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, INT glyph_index,
INT glyph_count, INT ppem, LPPOINT pt)
{
int j;
int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
if (glyph_index + write_dir < 0 || glyph_index + write_dir >= glyph_count) return;
TRACE("Cursive Attachment Positioning Subtable\n");
for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
{
const GPOS_CursivePosFormat1 *cpf1;
WORD offset = GET_BE_WORD(look->SubTable[j]);
cpf1 = (const GPOS_CursivePosFormat1*)((const BYTE*)look+offset);
if (GET_BE_WORD(cpf1->PosFormat) == 1)
{
int index_exit, index_entry;
offset = GET_BE_WORD( cpf1->Coverage );
index_exit = GSUB_is_glyph_covered((const BYTE*)cpf1+offset, glyphs[glyph_index]);
if (index_exit != -1 && cpf1->EntryExitRecord[index_exit].ExitAnchor!= 0)
{
index_entry = GSUB_is_glyph_covered((const BYTE*)cpf1+offset, glyphs[glyph_index+write_dir]);
if (index_entry != -1 && cpf1->EntryExitRecord[index_entry].EntryAnchor != 0)
{
POINT exit_pt, entry_pt;
offset = GET_BE_WORD(cpf1->EntryExitRecord[index_exit].ExitAnchor);
GPOS_get_anchor_values((const BYTE*)cpf1 + offset, &exit_pt, ppem);
offset = GET_BE_WORD(cpf1->EntryExitRecord[index_entry].EntryAnchor);
GPOS_get_anchor_values((const BYTE*)cpf1 + offset, &entry_pt, ppem);
TRACE("Found linkage %x[%i,%i] %x[%i,%i]\n",glyphs[glyph_index], exit_pt.x,exit_pt.y, glyphs[glyph_index+write_dir], entry_pt.x, entry_pt.y);
pt->x = entry_pt.x - exit_pt.x;
pt->y = entry_pt.y - exit_pt.y;
return;
}
}
}
else
FIXME("Cursive Attachment Positioning: Format %i Unhandled\n",GET_BE_WORD(cpf1->PosFormat));
}
return;
}
static VOID GPOS_apply_MarkToBase(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, INT glyph_index,
INT glyph_count, INT ppem, LPPOINT pt)
{
@ -1726,6 +1781,21 @@ static INT GPOS_apply_lookup(LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, c
}
return index;
}
case 3:
{
POINT desU = {0,0};
double devX, devY;
int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
GPOS_apply_CursiveAttachment(look, analysis, glyphs, glyph_index, glyph_count, ppem, &desU);
if (desU.x || desU.y)
{
GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
/* Windows does not appear to apply X offsets here */
pGoffset[glyph_index].dv = round(devY) + pGoffset[glyph_index+write_dir].dv;
}
break;
}
case 4:
{
double devX, devY;