diff options
Diffstat (limited to 'core/src/fpdfapi/fpdf_font/ttgsubtable.cpp')
| -rw-r--r-- | core/src/fpdfapi/fpdf_font/ttgsubtable.cpp | 452 |
1 files changed, 452 insertions, 0 deletions
diff --git a/core/src/fpdfapi/fpdf_font/ttgsubtable.cpp b/core/src/fpdfapi/fpdf_font/ttgsubtable.cpp new file mode 100644 index 0000000000..b7a7864c2d --- /dev/null +++ b/core/src/fpdfapi/fpdf_font/ttgsubtable.cpp @@ -0,0 +1,452 @@ +// 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;
+}
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