| // 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 = new CFX_GSUBTable; |
| if (pGsubTable->m_GsubImp.LoadGSUBTable((FT_Bytes)pFont->m_pGsubData)) { |
| return pGsubTable; |
| } |
| pGsubTable->Release(); |
| } |
| return NULL; |
| } |
