// Copyright 2014 PDFium Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style license that can be | |
// found in the LICENSE file. | |
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
#include "../../../include/fxge/fx_ge.h" | |
#include "../../../include/fxge/fx_freetype.h" | |
#include "ttgsubtable.h" | |
CFX_GlyphMap::CFX_GlyphMap() | |
{ | |
} | |
CFX_GlyphMap::~CFX_GlyphMap() | |
{ | |
} | |
extern "C" { | |
static int _CompareInt(const void* p1, const void* p2) | |
{ | |
return (*(FX_DWORD*)p1) - (*(FX_DWORD*)p2); | |
} | |
}; | |
struct _IntPair { | |
FX_INT32 key; | |
FX_INT32 value; | |
}; | |
void CFX_GlyphMap::SetAt(int key, int value) | |
{ | |
FX_DWORD count = m_Buffer.GetSize() / sizeof(_IntPair); | |
_IntPair* buf = (_IntPair*)m_Buffer.GetBuffer(); | |
_IntPair pair = {key, value}; | |
if (count == 0 || key > buf[count - 1].key) { | |
m_Buffer.AppendBlock(&pair, sizeof(_IntPair)); | |
return; | |
} | |
int low = 0, high = count - 1; | |
while (low <= high) { | |
int mid = (low + high) / 2; | |
if (buf[mid].key < key) { | |
low = mid + 1; | |
} else if (buf[mid].key > key) { | |
high = mid - 1; | |
} else { | |
buf[mid].value = value; | |
return; | |
} | |
} | |
m_Buffer.InsertBlock(low * sizeof(_IntPair), &pair, sizeof(_IntPair)); | |
} | |
FX_BOOL CFX_GlyphMap::Lookup(int key, int &value) | |
{ | |
FX_LPVOID pResult = FXSYS_bsearch(&key, m_Buffer.GetBuffer(), m_Buffer.GetSize() / sizeof(_IntPair), | |
sizeof(_IntPair), _CompareInt); | |
if (pResult == NULL) { | |
return FALSE; | |
} | |
value = ((FX_DWORD*)pResult)[1]; | |
return TRUE; | |
} | |
bool CFX_CTTGSUBTable::LoadGSUBTable(FT_Bytes gsub) | |
{ | |
header.Version = gsub[0] << 24 | gsub[1] << 16 | gsub[2] << 8 | gsub[3]; | |
if(header.Version != 0x00010000) { | |
return false; | |
} | |
header.ScriptList = gsub[4] << 8 | gsub[5]; | |
header.FeatureList = gsub[6] << 8 | gsub[7]; | |
header.LookupList = gsub[8] << 8 | gsub[9]; | |
return Parse( | |
&gsub[header.ScriptList], | |
&gsub[header.FeatureList], | |
&gsub[header.LookupList]); | |
} | |
bool CFX_CTTGSUBTable::GetVerticalGlyph(TT_uint32_t glyphnum, TT_uint32_t *vglyphnum) | |
{ | |
TT_uint32_t tag[] = { | |
(TT_uint8_t)'v' << 24 | | |
(TT_uint8_t)'r' << 16 | | |
(TT_uint8_t)'t' << 8 | | |
(TT_uint8_t)'2', | |
(TT_uint8_t)'v' << 24 | | |
(TT_uint8_t)'e' << 16 | | |
(TT_uint8_t)'r' << 8 | | |
(TT_uint8_t)'t', | |
}; | |
if (!m_bFeautureMapLoad) { | |
for (int i = 0; i < ScriptList.ScriptCount; i++) { | |
for (int j = 0; j < (ScriptList.ScriptRecord + i)->Script.LangSysCount; ++j) { | |
for (int k = 0; k < ((ScriptList.ScriptRecord + i)->Script.LangSysRecord + j)->LangSys.FeatureCount; ++k) { | |
FX_DWORD index = *(((ScriptList.ScriptRecord + i)->Script.LangSysRecord + j)->LangSys.FeatureIndex + k); | |
if (FeatureList.FeatureRecord[index].FeatureTag == tag[0] || FeatureList.FeatureRecord[index].FeatureTag == tag[1]) { | |
FX_DWORD value; | |
if (!m_featureMap.Lookup(index, value)) { | |
m_featureMap.SetAt(index, index); | |
} | |
} | |
} | |
} | |
} | |
if (!m_featureMap.GetStartPosition()) { | |
for (int i = 0; i < FeatureList.FeatureCount; i ++) { | |
if (FeatureList.FeatureRecord[i].FeatureTag == tag[0] || FeatureList.FeatureRecord[i].FeatureTag == tag[1]) { | |
FX_DWORD value; | |
if (!m_featureMap.Lookup(i, value)) { | |
m_featureMap.SetAt(i, i); | |
} | |
} | |
} | |
} | |
m_bFeautureMapLoad = TRUE; | |
} | |
FX_POSITION pos = m_featureMap.GetStartPosition(); | |
while (pos) { | |
FX_DWORD index, value; | |
m_featureMap.GetNextAssoc(pos, index, value); | |
if(GetVerticalGlyphSub(glyphnum, vglyphnum, &FeatureList.FeatureRecord[value].Feature)) { | |
return true; | |
} | |
} | |
return false; | |
} | |
bool CFX_CTTGSUBTable::GetVerticalGlyphSub( | |
TT_uint32_t glyphnum, | |
TT_uint32_t *vglyphnum, | |
struct TFeature *Feature) | |
{ | |
for(int i = 0; i < Feature->LookupCount; i++) { | |
int index = Feature->LookupListIndex[i]; | |
if(index < 0 || LookupList.LookupCount < index) { | |
continue; | |
} | |
if(LookupList.Lookup[index].LookupType == 1) { | |
if(GetVerticalGlyphSub2( | |
glyphnum, | |
vglyphnum, | |
&LookupList.Lookup[index])) { | |
return true; | |
} | |
} | |
} | |
return false; | |
} | |
bool CFX_CTTGSUBTable::GetVerticalGlyphSub2( | |
TT_uint32_t glyphnum, | |
TT_uint32_t *vglyphnum, | |
struct TLookup *Lookup) | |
{ | |
for(int i = 0; i < Lookup->SubTableCount; i++) { | |
switch(Lookup->SubTable[i]->SubstFormat) { | |
case 1: { | |
TSingleSubstFormat1 *tbl1 = (TSingleSubstFormat1*)Lookup->SubTable[i]; | |
if(GetCoverageIndex(tbl1->Coverage, glyphnum) >= 0) { | |
*vglyphnum = glyphnum + tbl1->DeltaGlyphID; | |
return true; | |
} | |
break; | |
} | |
case 2: { | |
TSingleSubstFormat2 *tbl2 = (TSingleSubstFormat2*)Lookup->SubTable[i]; | |
int index = -1; | |
index = GetCoverageIndex(tbl2->Coverage, glyphnum); | |
if(0 <= index && index < tbl2->GlyphCount) { | |
*vglyphnum = tbl2->Substitute[index]; | |
return true; | |
} | |
break; | |
} | |
} | |
} | |
return false; | |
} | |
int CFX_CTTGSUBTable::GetCoverageIndex(struct TCoverageFormatBase *Coverage, TT_uint32_t g) | |
{ | |
int i = 0; | |
if(Coverage == NULL) { | |
return -1; | |
} | |
switch(Coverage->CoverageFormat) { | |
case 1: { | |
TCoverageFormat1 *c1 = (TCoverageFormat1*)Coverage; | |
for(i = 0; i < c1->GlyphCount; i++) { | |
if((TT_uint32_t)c1->GlyphArray[i] == g) { | |
return i; | |
} | |
} | |
return -1; | |
} | |
case 2: { | |
TCoverageFormat2 *c2 = (TCoverageFormat2*)Coverage; | |
for(i = 0; i < c2->RangeCount; i++) { | |
TT_uint32_t s = c2->RangeRecord[i].Start; | |
TT_uint32_t e = c2->RangeRecord[i].End; | |
TT_uint32_t si = c2->RangeRecord[i].StartCoverageIndex; | |
if (s <= g && g <= e) { | |
return si + g - s; | |
} | |
} | |
return -1; | |
} | |
} | |
return -1; | |
} | |
bool CFX_CTTGSUBTable::Parse( | |
FT_Bytes scriptlist, | |
FT_Bytes featurelist, | |
FT_Bytes lookuplist) | |
{ | |
ParseScriptList(scriptlist, &ScriptList); | |
ParseFeatureList(featurelist, &FeatureList); | |
ParseLookupList(lookuplist, &LookupList); | |
return true; | |
} | |
void CFX_CTTGSUBTable::ParseScriptList(FT_Bytes raw, struct TScriptList *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
rec->ScriptCount = GetUInt16(sp); | |
if(rec->ScriptCount <= 0) { | |
return; | |
} | |
rec->ScriptRecord = new struct TScriptRecord[rec->ScriptCount]; | |
for(i = 0; i < rec->ScriptCount; i++) { | |
rec->ScriptRecord[i].ScriptTag = GetUInt32(sp); | |
TT_uint16_t offset = GetUInt16(sp); | |
ParseScript( | |
&raw[offset], | |
&rec->ScriptRecord[i].Script); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseScript(FT_Bytes raw, struct TScript *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
rec->DefaultLangSys = GetUInt16(sp); | |
rec->LangSysCount = GetUInt16(sp); | |
if(rec->LangSysCount <= 0) { | |
return; | |
} | |
rec->LangSysRecord = new struct TLangSysRecord[rec->LangSysCount]; | |
for(i = 0; i < rec->LangSysCount; i++) { | |
rec->LangSysRecord[i].LangSysTag = GetUInt32(sp); | |
TT_uint16_t offset = GetUInt16(sp); | |
ParseLangSys( | |
&raw[offset], | |
&rec->LangSysRecord[i].LangSys); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseLangSys(FT_Bytes raw, struct TLangSys *rec) | |
{ | |
FT_Bytes sp = raw; | |
rec->LookupOrder = GetUInt16(sp); | |
rec->ReqFeatureIndex = GetUInt16(sp); | |
rec->FeatureCount = GetUInt16(sp); | |
if(rec->FeatureCount <= 0) { | |
return; | |
} | |
rec->FeatureIndex = new TT_uint16_t[rec->FeatureCount]; | |
FXSYS_memset32(rec->FeatureIndex, 0, sizeof(TT_uint16_t) * rec->FeatureCount); | |
for (int i = 0; i < rec->FeatureCount; ++i) { | |
rec->FeatureIndex[i] = GetUInt16(sp); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseFeatureList(FT_Bytes raw, TFeatureList *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
rec->FeatureCount = GetUInt16(sp); | |
if(rec->FeatureCount <= 0) { | |
return; | |
} | |
rec->FeatureRecord = new struct TFeatureRecord[rec->FeatureCount]; | |
for(i = 0; i < rec->FeatureCount; i++) { | |
rec->FeatureRecord[i].FeatureTag = GetUInt32(sp); | |
TT_uint16_t offset = GetUInt16(sp); | |
ParseFeature( | |
&raw[offset], | |
&rec->FeatureRecord[i].Feature); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseFeature(FT_Bytes raw, TFeature *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
rec->FeatureParams = GetUInt16(sp); | |
rec->LookupCount = GetUInt16(sp); | |
if(rec->LookupCount <= 0) { | |
return; | |
} | |
rec->LookupListIndex = new TT_uint16_t[rec->LookupCount]; | |
for(i = 0; i < rec->LookupCount; i++) { | |
rec->LookupListIndex[i] = GetUInt16(sp); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseLookupList(FT_Bytes raw, TLookupList *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
rec->LookupCount = GetUInt16(sp); | |
if(rec->LookupCount <= 0) { | |
return; | |
} | |
rec->Lookup = new struct TLookup[rec->LookupCount]; | |
for(i = 0; i < rec->LookupCount; i++) { | |
TT_uint16_t offset = GetUInt16(sp); | |
ParseLookup( | |
&raw[offset], | |
&rec->Lookup[i]); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseLookup(FT_Bytes raw, TLookup *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
rec->LookupType = GetUInt16(sp); | |
rec->LookupFlag = GetUInt16(sp); | |
rec->SubTableCount = GetUInt16(sp); | |
if(rec->SubTableCount <= 0) { | |
return; | |
} | |
rec->SubTable = new struct TSubTableBase*[rec->SubTableCount]; | |
for(i = 0; i < rec->SubTableCount; i++) { | |
rec->SubTable[i] = NULL; | |
} | |
if(rec->LookupType != 1) { | |
return; | |
} | |
for(i = 0; i < rec->SubTableCount; i++) { | |
TT_uint16_t offset = GetUInt16(sp); | |
ParseSingleSubst( | |
&raw[offset], | |
&rec->SubTable[i]); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseCoverage(FT_Bytes raw, TCoverageFormatBase **rec) | |
{ | |
FT_Bytes sp = raw; | |
TT_uint16_t Format = GetUInt16(sp); | |
switch(Format) { | |
case 1: | |
*rec = new TCoverageFormat1(); | |
ParseCoverageFormat1(raw, (TCoverageFormat1*)*rec); | |
break; | |
case 2: | |
*rec = new TCoverageFormat2(); | |
ParseCoverageFormat2(raw, (TCoverageFormat2*)*rec); | |
break; | |
} | |
} | |
void CFX_CTTGSUBTable::ParseCoverageFormat1(FT_Bytes raw, TCoverageFormat1 *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
GetUInt16(sp); | |
rec->GlyphCount = GetUInt16(sp); | |
if(rec->GlyphCount <= 0) { | |
return; | |
} | |
rec->GlyphArray = new TT_uint16_t[rec->GlyphCount]; | |
for(i = 0; i < rec->GlyphCount; i++) { | |
rec->GlyphArray[i] = GetUInt16(sp); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseCoverageFormat2(FT_Bytes raw, TCoverageFormat2 *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
GetUInt16(sp); | |
rec->RangeCount = GetUInt16(sp); | |
if(rec->RangeCount <= 0) { | |
return; | |
} | |
rec->RangeRecord = new TRangeRecord[rec->RangeCount]; | |
for(i = 0; i < rec->RangeCount; i++) { | |
rec->RangeRecord[i].Start = GetUInt16(sp); | |
rec->RangeRecord[i].End = GetUInt16(sp); | |
rec->RangeRecord[i].StartCoverageIndex = GetUInt16(sp); | |
} | |
} | |
void CFX_CTTGSUBTable::ParseSingleSubst(FT_Bytes raw, TSubTableBase **rec) | |
{ | |
FT_Bytes sp = raw; | |
TT_uint16_t Format = GetUInt16(sp); | |
switch(Format) { | |
case 1: | |
*rec = new TSingleSubstFormat1(); | |
ParseSingleSubstFormat1(raw, (TSingleSubstFormat1*)*rec); | |
break; | |
case 2: | |
*rec = new TSingleSubstFormat2(); | |
ParseSingleSubstFormat2(raw, (TSingleSubstFormat2*)*rec); | |
break; | |
} | |
} | |
void CFX_CTTGSUBTable::ParseSingleSubstFormat1(FT_Bytes raw, TSingleSubstFormat1 *rec) | |
{ | |
FT_Bytes sp = raw; | |
GetUInt16(sp); | |
TT_uint16_t offset = GetUInt16(sp); | |
ParseCoverage( | |
&raw[offset], | |
&rec->Coverage); | |
rec->DeltaGlyphID = GetInt16(sp); | |
} | |
void CFX_CTTGSUBTable::ParseSingleSubstFormat2(FT_Bytes raw, TSingleSubstFormat2 *rec) | |
{ | |
int i; | |
FT_Bytes sp = raw; | |
GetUInt16(sp); | |
TT_uint16_t offset = GetUInt16(sp); | |
ParseCoverage( | |
&raw[offset], | |
&rec->Coverage); | |
rec->GlyphCount = GetUInt16(sp); | |
if(rec->GlyphCount <= 0) { | |
return; | |
} | |
rec->Substitute = new TT_uint16_t[rec->GlyphCount]; | |
for(i = 0; i < rec->GlyphCount; i++) { | |
rec->Substitute[i] = GetUInt16(sp); | |
} | |
} | |
FX_BOOL CFX_GSUBTable::GetVerticalGlyph(FX_DWORD glyphnum, FX_DWORD* vglyphnum) | |
{ | |
return m_GsubImp.GetVerticalGlyph(glyphnum, vglyphnum); | |
} | |
IFX_GSUBTable* FXGE_CreateGSUBTable(CFX_Font* pFont) | |
{ | |
if (!pFont) { | |
return NULL; | |
} | |
if (NULL == pFont->m_pGsubData) { | |
unsigned long length = 0; | |
int error = FXFT_Load_Sfnt_Table(pFont->m_Face, FT_MAKE_TAG('G', 'S', 'U', 'B'), 0, NULL, &length); | |
if (!error) { | |
pFont->m_pGsubData = (unsigned char*)FX_Alloc(FX_BYTE, length); | |
} | |
if (!pFont->m_pGsubData) { | |
return NULL; | |
} | |
} | |
int error = FXFT_Load_Sfnt_Table(pFont->m_Face, FT_MAKE_TAG('G', 'S', 'U', 'B'), 0, pFont->m_pGsubData, NULL); | |
if (!error && pFont->m_pGsubData) { | |
CFX_GSUBTable* pGsubTable = FX_NEW CFX_GSUBTable; | |
if (!pGsubTable) { | |
return NULL; | |
} | |
if (pGsubTable->m_GsubImp.LoadGSUBTable((FT_Bytes)pFont->m_pGsubData)) { | |
return pGsubTable; | |
} | |
delete pGsubTable; | |
} | |
return NULL; | |
} |