The Tor Browser: gfx/skia/trunk/src/pdf/SkPDFFont.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/pdf/SkPDFFont.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/pdf/SkPDFFont.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include <ctype.h>
 #include "SkData.h"
 #include "SkFontHost.h"
 #include "SkGlyphCache.h"
 #include "SkPaint.h"
 #include "SkPDFCatalog.h"
 #include "SkPDFDevice.h"
 #include "SkPDFFont.h"
 #include "SkPDFFontImpl.h"
 #include "SkPDFStream.h"
 #include "SkPDFTypes.h"
 #include "SkPDFUtils.h"
 #include "SkRefCnt.h"
 #include "SkScalar.h"
 #include "SkStream.h"
 #include "SkTypefacePriv.h"
 #include "SkTypes.h"
 #include "SkUtils.h"
 #if defined (SK_SFNTLY_SUBSETTER)
 #include SK_SFNTLY_SUBSETTER
 #endif
 // PDF's notion of symbolic vs non-symbolic is related to the character set, not
 // symbols vs. characters.  Rarely is a font the right character set to call it
 // non-symbolic, so always call it symbolic.  (PDF 1.4 spec, section 5.7.1)
 static const int kPdfSymbolic = 4;
 namespace {
 ///////////////////////////////////////////////////////////////////////////////
 // File-Local Functions
 ///////////////////////////////////////////////////////////////////////////////
 bool parsePFBSection(const uint8_t** src, size_t* len, int sectionType,
                      size_t* size) {
     // PFB sections have a two or six bytes header. 0x80 and a one byte
     // section type followed by a four byte section length.  Type one is
     // an ASCII section (includes a length), type two is a binary section
     // (includes a length) and type three is an EOF marker with no length.
     const uint8_t* buf = *src;
     if (*len < 2 || buf[0] != 0x80 || buf[1] != sectionType) {
         return false;
     } else if (buf[1] == 3) {
         return true;
     } else if (*len < 6) {
         return false;
     }
     *size = (size_t)buf[2] | ((size_t)buf[3] << 8) | ((size_t)buf[4] << 16) |
             ((size_t)buf[5] << 24);
     size_t consumed = *size + 6;
     if (consumed > *len) {
         return false;
     }
     *src = *src + consumed;
     *len = *len - consumed;
     return true;
 }
 bool parsePFB(const uint8_t* src, size_t size, size_t* headerLen,
               size_t* dataLen, size_t* trailerLen) {
     const uint8_t* srcPtr = src;
     size_t remaining = size;
     return parsePFBSection(&srcPtr, &remaining, 1, headerLen) &&
            parsePFBSection(&srcPtr, &remaining, 2, dataLen) &&
            parsePFBSection(&srcPtr, &remaining, 1, trailerLen) &&
            parsePFBSection(&srcPtr, &remaining, 3, NULL);
 }
 /* The sections of a PFA file are implicitly defined.  The body starts
  * after the line containing "eexec," and the trailer starts with 512
  * literal 0's followed by "cleartomark" (plus arbitrary white space).
  *
  * This function assumes that src is NUL terminated, but the NUL
  * termination is not included in size.
  *
  */
 bool parsePFA(const char* src, size_t size, size_t* headerLen,
               size_t* hexDataLen, size_t* dataLen, size_t* trailerLen) {
     const char* end = src + size;
     const char* dataPos = strstr(src, "eexec");
     if (!dataPos) {
         return false;
     }
     dataPos += strlen("eexec");
     while ((*dataPos == '\n' || *dataPos == '\r' || *dataPos == ' ') &&
             dataPos < end) {
         dataPos++;
     }
     *headerLen = dataPos - src;
     const char* trailerPos = strstr(dataPos, "cleartomark");
     if (!trailerPos) {
         return false;
     }
     int zeroCount = 0;
     for (trailerPos--; trailerPos > dataPos && zeroCount < 512; trailerPos--) {
         if (*trailerPos == '\n' || *trailerPos == '\r' || *trailerPos == ' ') {
             continue;
         } else if (*trailerPos == '0') {
             zeroCount++;
         } else {
             return false;
         }
     }
     if (zeroCount != 512) {
         return false;
     }
     *hexDataLen = trailerPos - src - *headerLen;
     *trailerLen = size - *headerLen - *hexDataLen;
     // Verify that the data section is hex encoded and count the bytes.
     int nibbles = 0;
     for (; dataPos < trailerPos; dataPos++) {
         if (isspace(*dataPos)) {
             continue;
         }
         if (!isxdigit(*dataPos)) {
             return false;
         }
         nibbles++;
     }
     *dataLen = (nibbles + 1) / 2;
     return true;
 }
 int8_t hexToBin(uint8_t c) {
     if (!isxdigit(c)) {
         return -1;
     } else if (c <= '9') {
         return c - '0';
     } else if (c <= 'F') {
         return c - 'A' + 10;
     } else if (c <= 'f') {
         return c - 'a' + 10;
     }
     return -1;
 }
 SkStream* handleType1Stream(SkStream* srcStream, size_t* headerLen,
                             size_t* dataLen, size_t* trailerLen) {
     // srcStream may be backed by a file or a unseekable fd, so we may not be
     // able to use skip(), rewind(), or getMemoryBase().  read()ing through
     // the input only once is doable, but very ugly. Furthermore, it'd be nice
     // if the data was NUL terminated so that we can use strstr() to search it.
     // Make as few copies as possible given these constraints.
     SkDynamicMemoryWStream dynamicStream;
     SkAutoTUnref<SkMemoryStream> staticStream;
     SkData* data = NULL;
     const uint8_t* src;
     size_t srcLen;
     if ((srcLen = srcStream->getLength()) > 0) {
         staticStream.reset(new SkMemoryStream(srcLen + 1));
         src = (const uint8_t*)staticStream->getMemoryBase();
         if (srcStream->getMemoryBase() != NULL) {
             memcpy((void *)src, srcStream->getMemoryBase(), srcLen);
         } else {
             size_t read = 0;
             while (read < srcLen) {
                 size_t got = srcStream->read((void *)staticStream->getAtPos(),
                                              srcLen - read);
                 if (got == 0) {
                     return NULL;
                 }
                 read += got;
                 staticStream->seek(read);
             }
         }
         ((uint8_t *)src)[srcLen] = 0;
     } else {
         static const size_t kBufSize = 4096;
         uint8_t buf[kBufSize];
         size_t amount;
         while ((amount = srcStream->read(buf, kBufSize)) > 0) {
             dynamicStream.write(buf, amount);
         }
         amount = 0;
         dynamicStream.write(&amount, 1);  // NULL terminator.
         data = dynamicStream.copyToData();
         src = data->bytes();
         srcLen = data->size() - 1;
     }
     // this handles releasing the data we may have gotten from dynamicStream.
     // if data is null, it is a no-op
     SkAutoDataUnref aud(data);
     if (parsePFB(src, srcLen, headerLen, dataLen, trailerLen)) {
         SkMemoryStream* result =
             new SkMemoryStream(*headerLen + *dataLen + *trailerLen);
         memcpy((char*)result->getAtPos(), src + 6, *headerLen);
         result->seek(*headerLen);
         memcpy((char*)result->getAtPos(), src + 6 + *headerLen + 6, *dataLen);
         result->seek(*headerLen + *dataLen);
         memcpy((char*)result->getAtPos(), src + 6 + *headerLen + 6 + *dataLen,
                *trailerLen);
         result->rewind();
         return result;
     }
     // A PFA has to be converted for PDF.
     size_t hexDataLen;
     if (parsePFA((const char*)src, srcLen, headerLen, &hexDataLen, dataLen,
                  trailerLen)) {
         SkMemoryStream* result =
             new SkMemoryStream(*headerLen + *dataLen + *trailerLen);
         memcpy((char*)result->getAtPos(), src, *headerLen);
         result->seek(*headerLen);
         const uint8_t* hexData = src + *headerLen;
         const uint8_t* trailer = hexData + hexDataLen;
         size_t outputOffset = 0;
         uint8_t dataByte = 0;  // To hush compiler.
         bool highNibble = true;
         for (; hexData < trailer; hexData++) {
             int8_t curNibble = hexToBin(*hexData);
             if (curNibble < 0) {
                 continue;
             }
             if (highNibble) {
                 dataByte = curNibble << 4;
                 highNibble = false;
             } else {
                 dataByte |= curNibble;
                 highNibble = true;
                 ((char *)result->getAtPos())[outputOffset++] = dataByte;
             }
         }
         if (!highNibble) {
             ((char *)result->getAtPos())[outputOffset++] = dataByte;
         }
         SkASSERT(outputOffset == *dataLen);
         result->seek(*headerLen + outputOffset);
         memcpy((char *)result->getAtPos(), src + *headerLen + hexDataLen,
                *trailerLen);
         result->rewind();
         return result;
     }
     return NULL;
 }
 // scale from em-units to base-1000, returning as a SkScalar
 SkScalar scaleFromFontUnits(int16_t val, uint16_t emSize) {
     SkScalar scaled = SkIntToScalar(val);
     if (emSize == 1000) {
         return scaled;
     } else {
         return SkScalarMulDiv(scaled, 1000, emSize);
     }
 }
 void setGlyphWidthAndBoundingBox(SkScalar width, SkIRect box,
                                  SkWStream* content) {
     // Specify width and bounding box for the glyph.
     SkPDFScalar::Append(width, content);
     content->writeText(" 0 ");
     content->writeDecAsText(box.fLeft);
     content->writeText(" ");
     content->writeDecAsText(box.fTop);
     content->writeText(" ");
     content->writeDecAsText(box.fRight);
     content->writeText(" ");
     content->writeDecAsText(box.fBottom);
     content->writeText(" d1\n");
 }
 SkPDFArray* makeFontBBox(SkIRect glyphBBox, uint16_t emSize) {
     SkPDFArray* bbox = new SkPDFArray;
     bbox->reserve(4);
     bbox->appendScalar(scaleFromFontUnits(glyphBBox.fLeft, emSize));
     bbox->appendScalar(scaleFromFontUnits(glyphBBox.fBottom, emSize));
     bbox->appendScalar(scaleFromFontUnits(glyphBBox.fRight, emSize));
     bbox->appendScalar(scaleFromFontUnits(glyphBBox.fTop, emSize));
     return bbox;
 }
 SkPDFArray* appendWidth(const int16_t& width, uint16_t emSize,
                         SkPDFArray* array) {
     array->appendScalar(scaleFromFontUnits(width, emSize));
     return array;
 }
 SkPDFArray* appendVerticalAdvance(
         const SkAdvancedTypefaceMetrics::VerticalMetric& advance,
         uint16_t emSize, SkPDFArray* array) {
     appendWidth(advance.fVerticalAdvance, emSize, array);
     appendWidth(advance.fOriginXDisp, emSize, array);
     appendWidth(advance.fOriginYDisp, emSize, array);
     return array;
 }
 template <typename Data>
 SkPDFArray* composeAdvanceData(
         SkAdvancedTypefaceMetrics::AdvanceMetric<Data>* advanceInfo,
         uint16_t emSize,
         SkPDFArray* (*appendAdvance)(const Data& advance, uint16_t emSize,
                                      SkPDFArray* array),
         Data* defaultAdvance) {
     SkPDFArray* result = new SkPDFArray();
     for (; advanceInfo != NULL; advanceInfo = advanceInfo->fNext.get()) {
         switch (advanceInfo->fType) {
             case SkAdvancedTypefaceMetrics::WidthRange::kDefault: {
                 SkASSERT(advanceInfo->fAdvance.count() == 1);
                 *defaultAdvance = advanceInfo->fAdvance[0];
                 break;
             }
             case SkAdvancedTypefaceMetrics::WidthRange::kRange: {
                 SkAutoTUnref<SkPDFArray> advanceArray(new SkPDFArray());
                 for (int j = 0; j < advanceInfo->fAdvance.count(); j++)
                     appendAdvance(advanceInfo->fAdvance[j], emSize,
                                   advanceArray.get());
                 result->appendInt(advanceInfo->fStartId);
                 result->append(advanceArray.get());
                 break;
             }
             case SkAdvancedTypefaceMetrics::WidthRange::kRun: {
                 SkASSERT(advanceInfo->fAdvance.count() == 1);
                 result->appendInt(advanceInfo->fStartId);
                 result->appendInt(advanceInfo->fEndId);
                 appendAdvance(advanceInfo->fAdvance[0], emSize, result);
                 break;
             }
         }
     }
     return result;
 }
 }  // namespace
 static void append_tounicode_header(SkDynamicMemoryWStream* cmap,
                                     uint16_t firstGlyphID,
                                     uint16_t lastGlyphID) {
     // 12 dict begin: 12 is an Adobe-suggested value. Shall not change.
     // It's there to prevent old version Adobe Readers from malfunctioning.
     const char* kHeader =
         "/CIDInit /ProcSet findresource begin\n"
         "12 dict begin\n"
         "begincmap\n";
     cmap->writeText(kHeader);
     // The /CIDSystemInfo must be consistent to the one in
     // SkPDFFont::populateCIDFont().
     // We can not pass over the system info object here because the format is
     // different. This is not a reference object.
     const char* kSysInfo =
         "/CIDSystemInfo\n"
         "<<  /Registry (Adobe)\n"
         "/Ordering (UCS)\n"
         "/Supplement 0\n"
         ">> def\n";
     cmap->writeText(kSysInfo);
     // The CMapName must be consistent to /CIDSystemInfo above.
     // /CMapType 2 means ToUnicode.
     // Codespace range just tells the PDF processor the valid range.
     const char* kTypeInfoHeader =
         "/CMapName /Adobe-Identity-UCS def\n"
         "/CMapType 2 def\n"
         "1 begincodespacerange\n";
     cmap->writeText(kTypeInfoHeader);
     // e.g.     "<0000> <FFFF>\n"
     SkString range;
     range.appendf("<%04X> <%04X>\n", firstGlyphID, lastGlyphID);
     cmap->writeText(range.c_str());
     const char* kTypeInfoFooter = "endcodespacerange\n";
     cmap->writeText(kTypeInfoFooter);
 }
 static void append_cmap_footer(SkDynamicMemoryWStream* cmap) {
     const char* kFooter =
         "endcmap\n"
         "CMapName currentdict /CMap defineresource pop\n"
         "end\n"
         "end";
     cmap->writeText(kFooter);
 }
 struct BFChar {
     uint16_t fGlyphId;
     SkUnichar fUnicode;
 };
 struct BFRange {
     uint16_t fStart;
     uint16_t fEnd;
     SkUnichar fUnicode;
 };
 static void append_bfchar_section(const SkTDArray<BFChar>& bfchar,
                                   SkDynamicMemoryWStream* cmap) {
     // PDF spec defines that every bf* list can have at most 100 entries.
     for (int i = 0; i < bfchar.count(); i += 100) {
         int count = bfchar.count() - i;
         count = SkMin32(count, 100);
         cmap->writeDecAsText(count);
         cmap->writeText(" beginbfchar\n");
         for (int j = 0; j < count; ++j) {
             cmap->writeText("<");
             cmap->writeHexAsText(bfchar[i + j].fGlyphId, 4);
             cmap->writeText("> <");
             cmap->writeHexAsText(bfchar[i + j].fUnicode, 4);
             cmap->writeText(">\n");
         }
         cmap->writeText("endbfchar\n");
     }
 }
 static void append_bfrange_section(const SkTDArray<BFRange>& bfrange,
                                    SkDynamicMemoryWStream* cmap) {
     // PDF spec defines that every bf* list can have at most 100 entries.
     for (int i = 0; i < bfrange.count(); i += 100) {
         int count = bfrange.count() - i;
         count = SkMin32(count, 100);
         cmap->writeDecAsText(count);
         cmap->writeText(" beginbfrange\n");
         for (int j = 0; j < count; ++j) {
             cmap->writeText("<");
             cmap->writeHexAsText(bfrange[i + j].fStart, 4);
             cmap->writeText("> <");
             cmap->writeHexAsText(bfrange[i + j].fEnd, 4);
             cmap->writeText("> <");
             cmap->writeHexAsText(bfrange[i + j].fUnicode, 4);
             cmap->writeText(">\n");
         }
         cmap->writeText("endbfrange\n");
     }
 }
 // Generate <bfchar> and <bfrange> table according to PDF spec 1.4 and Adobe
 // Technote 5014.
 // The function is not static so we can test it in unit tests.
 //
 // Current implementation guarantees bfchar and bfrange entries do not overlap.
 //
 // Current implementation does not attempt aggresive optimizations against
 // following case because the specification is not clear.
 //
 // 4 beginbfchar          1 beginbfchar
 // <0003> <0013>          <0020> <0014>
 // <0005> <0015>    to    endbfchar
 // <0007> <0017>          1 beginbfrange
 // <0020> <0014>          <0003> <0007> <0013>
 // endbfchar              endbfrange
 //
 // Adobe Technote 5014 said: "Code mappings (unlike codespace ranges) may
 // overlap, but succeeding maps supersede preceding maps."
 //
 // In case of searching text in PDF, bfrange will have higher precedence so
 // typing char id 0x0014 in search box will get glyph id 0x0004 first.  However,
 // the spec does not mention how will this kind of conflict being resolved.
 //
 // For the worst case (having 65536 continuous unicode and we use every other
 // one of them), the possible savings by aggressive optimization is 416KB
 // pre-compressed and does not provide enough motivation for implementation.
 // FIXME: this should be in a header so that it is separately testable
 // ( see caller in tests/ToUnicode.cpp )
 void append_cmap_sections(const SkTDArray<SkUnichar>& glyphToUnicode,
                           const SkPDFGlyphSet* subset,
                           SkDynamicMemoryWStream* cmap,
                           bool multiByteGlyphs,
                           uint16_t firstGlyphID,
                           uint16_t lastGlyphID);
 void append_cmap_sections(const SkTDArray<SkUnichar>& glyphToUnicode,
                           const SkPDFGlyphSet* subset,
                           SkDynamicMemoryWStream* cmap,
                           bool multiByteGlyphs,
                           uint16_t firstGlyphID,
                           uint16_t lastGlyphID) {
     if (glyphToUnicode.isEmpty()) {
         return;
     }
     int glyphOffset = 0;
     if (!multiByteGlyphs) {
         glyphOffset = firstGlyphID - 1;
     }
     SkTDArray<BFChar> bfcharEntries;
     SkTDArray<BFRange> bfrangeEntries;
     BFRange currentRangeEntry = {0, 0, 0};
     bool rangeEmpty = true;
     const int limit =
             SkMin32(lastGlyphID + 1, glyphToUnicode.count()) - glyphOffset;
     for (int i = firstGlyphID - glyphOffset; i < limit + 1; ++i) {
         bool inSubset = i < limit &&
                         (subset == NULL || subset->has(i + glyphOffset));
         if (!rangeEmpty) {
             // PDF spec requires bfrange not changing the higher byte,
             // e.g. <1035> <10FF> <2222> is ok, but
             //      <1035> <1100> <2222> is no good
             bool inRange =
                 i == currentRangeEntry.fEnd + 1 &&
                 i >> 8 == currentRangeEntry.fStart >> 8 &&
                 i < limit &&
                 glyphToUnicode[i + glyphOffset] ==
                     currentRangeEntry.fUnicode + i - currentRangeEntry.fStart;
             if (!inSubset || !inRange) {
                 if (currentRangeEntry.fEnd > currentRangeEntry.fStart) {
                     bfrangeEntries.push(currentRangeEntry);
                 } else {
                     BFChar* entry = bfcharEntries.append();
                     entry->fGlyphId = currentRangeEntry.fStart;
                     entry->fUnicode = currentRangeEntry.fUnicode;
                 }
                 rangeEmpty = true;
             }
         }
         if (inSubset) {
             currentRangeEntry.fEnd = i;
             if (rangeEmpty) {
               currentRangeEntry.fStart = i;
               currentRangeEntry.fUnicode = glyphToUnicode[i + glyphOffset];
               rangeEmpty = false;
             }
         }
     }
     // The spec requires all bfchar entries for a font must come before bfrange
     // entries.
     append_bfchar_section(bfcharEntries, cmap);
     append_bfrange_section(bfrangeEntries, cmap);
 }
 static SkPDFStream* generate_tounicode_cmap(
         const SkTDArray<SkUnichar>& glyphToUnicode,
         const SkPDFGlyphSet* subset,
         bool multiByteGlyphs,
         uint16_t firstGlyphID,
         uint16_t lastGlyphID) {
     SkDynamicMemoryWStream cmap;
     if (multiByteGlyphs) {
         append_tounicode_header(&cmap, firstGlyphID, lastGlyphID);
     } else {
         append_tounicode_header(&cmap, 1, lastGlyphID - firstGlyphID + 1);
     }
     append_cmap_sections(glyphToUnicode, subset, &cmap, multiByteGlyphs,
                          firstGlyphID, lastGlyphID);
     append_cmap_footer(&cmap);
     SkAutoTUnref<SkMemoryStream> cmapStream(new SkMemoryStream());
     cmapStream->setData(cmap.copyToData())->unref();
     return new SkPDFStream(cmapStream.get());
 }
 #if defined (SK_SFNTLY_SUBSETTER)
 static void sk_delete_array(const void* ptr, size_t, void*) {
     // Use C-style cast to cast away const and cast type simultaneously.
     delete[] (unsigned char*)ptr;
 }
 #endif
 static int get_subset_font_stream(const char* fontName,
                                   const SkTypeface* typeface,
                                   const SkTDArray<uint32_t>& subset,
                                   SkPDFStream** fontStream) {
     int ttcIndex;
     SkAutoTUnref<SkStream> fontData(typeface->openStream(&ttcIndex));
     int fontSize = fontData->getLength();
 #if defined (SK_SFNTLY_SUBSETTER)
     // Read font into buffer.
     SkPDFStream* subsetFontStream = NULL;
     SkTDArray<unsigned char> originalFont;
     originalFont.setCount(fontSize);
     if (fontData->read(originalFont.begin(), fontSize) == (size_t)fontSize) {
         unsigned char* subsetFont = NULL;
         // sfntly requires unsigned int* to be passed in, as far as we know,
         // unsigned int is equivalent to uint32_t on all platforms.
         SK_COMPILE_ASSERT(sizeof(unsigned int) == sizeof(uint32_t),
                           unsigned_int_not_32_bits);
         int subsetFontSize = SfntlyWrapper::SubsetFont(fontName,
                                                        originalFont.begin(),
                                                        fontSize,
                                                        subset.begin(),
                                                        subset.count(),
                                                        &subsetFont);
         if (subsetFontSize > 0 && subsetFont != NULL) {
             SkAutoDataUnref data(SkData::NewWithProc(subsetFont,
                                                      subsetFontSize,
                                                      sk_delete_array,
                                                      NULL));
             subsetFontStream = new SkPDFStream(data.get());
             fontSize = subsetFontSize;
         }
     }
     if (subsetFontStream) {
         *fontStream = subsetFontStream;
         return fontSize;
     }
     fontData->rewind();
 #else
     sk_ignore_unused_variable(fontName);
     sk_ignore_unused_variable(subset);
 #endif
     // Fail over: just embed the whole font.
     *fontStream = new SkPDFStream(fontData.get());
     return fontSize;
 }
 ///////////////////////////////////////////////////////////////////////////////
 // class SkPDFGlyphSet
 ///////////////////////////////////////////////////////////////////////////////
 SkPDFGlyphSet::SkPDFGlyphSet() : fBitSet(SK_MaxU16 + 1) {
 }
 void SkPDFGlyphSet::set(const uint16_t* glyphIDs, int numGlyphs) {
     for (int i = 0; i < numGlyphs; ++i) {
         fBitSet.setBit(glyphIDs[i], true);
     }
 }
 bool SkPDFGlyphSet::has(uint16_t glyphID) const {
     return fBitSet.isBitSet(glyphID);
 }
 void SkPDFGlyphSet::merge(const SkPDFGlyphSet& usage) {
     fBitSet.orBits(usage.fBitSet);
 }
 void SkPDFGlyphSet::exportTo(SkTDArray<unsigned int>* glyphIDs) const {
     fBitSet.exportTo(glyphIDs);
 }
 ///////////////////////////////////////////////////////////////////////////////
 // class SkPDFGlyphSetMap
 ///////////////////////////////////////////////////////////////////////////////
 SkPDFGlyphSetMap::FontGlyphSetPair::FontGlyphSetPair(SkPDFFont* font,
                                                      SkPDFGlyphSet* glyphSet)
         : fFont(font),
           fGlyphSet(glyphSet) {
 }
 SkPDFGlyphSetMap::F2BIter::F2BIter(const SkPDFGlyphSetMap& map) {
     reset(map);
 }
 const SkPDFGlyphSetMap::FontGlyphSetPair* SkPDFGlyphSetMap::F2BIter::next() const {
     if (fIndex >= fMap->count()) {
         return NULL;
     }
     return &((*fMap)[fIndex++]);
 }
 void SkPDFGlyphSetMap::F2BIter::reset(const SkPDFGlyphSetMap& map) {
     fMap = &(map.fMap);
     fIndex = 0;
 }
 SkPDFGlyphSetMap::SkPDFGlyphSetMap() {
 }
 SkPDFGlyphSetMap::~SkPDFGlyphSetMap() {
     reset();
 }
 void SkPDFGlyphSetMap::merge(const SkPDFGlyphSetMap& usage) {
     for (int i = 0; i < usage.fMap.count(); ++i) {
         SkPDFGlyphSet* myUsage = getGlyphSetForFont(usage.fMap[i].fFont);
         myUsage->merge(*(usage.fMap[i].fGlyphSet));
     }
 }
 void SkPDFGlyphSetMap::reset() {
     for (int i = 0; i < fMap.count(); ++i) {
         delete fMap[i].fGlyphSet;  // Should not be NULL.
     }
     fMap.reset();
 }
 void SkPDFGlyphSetMap::noteGlyphUsage(SkPDFFont* font, const uint16_t* glyphIDs,
                                       int numGlyphs) {
     SkPDFGlyphSet* subset = getGlyphSetForFont(font);
     if (subset) {
         subset->set(glyphIDs, numGlyphs);
     }
 }
 SkPDFGlyphSet* SkPDFGlyphSetMap::getGlyphSetForFont(SkPDFFont* font) {
     int index = fMap.count();
     for (int i = 0; i < index; ++i) {
         if (fMap[i].fFont == font) {
             return fMap[i].fGlyphSet;
         }
     }
     fMap.append();
     index = fMap.count() - 1;
     fMap[index].fFont = font;
     fMap[index].fGlyphSet = new SkPDFGlyphSet();
     return fMap[index].fGlyphSet;
 }
 ///////////////////////////////////////////////////////////////////////////////
 // class SkPDFFont
 ///////////////////////////////////////////////////////////////////////////////
 /* Font subset design: It would be nice to be able to subset fonts
  * (particularly type 3 fonts), but it's a lot of work and not a priority.
  *
  * Resources are canonicalized and uniqueified by pointer so there has to be
  * some additional state indicating which subset of the font is used.  It
  * must be maintained at the page granularity and then combined at the document
  * granularity. a) change SkPDFFont to fill in its state on demand, kind of
  * like SkPDFGraphicState.  b) maintain a per font glyph usage class in each
  * page/pdf device. c) in the document, retrieve the per font glyph usage
  * from each page and combine it and ask for a resource with that subset.
  */
 SkPDFFont::~SkPDFFont() {
     SkAutoMutexAcquire lock(CanonicalFontsMutex());
     int index = -1;
     for (int i = 0 ; i < CanonicalFonts().count() ; i++) {
         if (CanonicalFonts()[i].fFont == this) {
             index = i;
         }
     }
     SkDEBUGCODE(int indexFound;)
     SkASSERT(index == -1 ||
              (Find(fTypeface->uniqueID(),
                    fFirstGlyphID,
                    &indexFound) &&
              index == indexFound));
     if (index >= 0) {
         CanonicalFonts().removeShuffle(index);
     }
     fResources.unrefAll();
 }
 void SkPDFFont::getResources(const SkTSet<SkPDFObject*>& knownResourceObjects,
                              SkTSet<SkPDFObject*>* newResourceObjects) {
     GetResourcesHelper(&fResources, knownResourceObjects, newResourceObjects);
 }
 SkTypeface* SkPDFFont::typeface() {
     return fTypeface.get();
 }
 SkAdvancedTypefaceMetrics::FontType SkPDFFont::getType() {
     return fFontType;
 }
 bool SkPDFFont::hasGlyph(uint16_t id) {
     return (id >= fFirstGlyphID && id <= fLastGlyphID) || id == 0;
 }
 size_t SkPDFFont::glyphsToPDFFontEncoding(uint16_t* glyphIDs,
                                           size_t numGlyphs) {
     // A font with multibyte glyphs will support all glyph IDs in a single font.
     if (this->multiByteGlyphs()) {
         return numGlyphs;
     }
     for (size_t i = 0; i < numGlyphs; i++) {
         if (glyphIDs[i] == 0) {
             continue;
         }
         if (glyphIDs[i] < fFirstGlyphID || glyphIDs[i] > fLastGlyphID) {
             return i;
         }
         glyphIDs[i] -= (fFirstGlyphID - 1);
     }
     return numGlyphs;
 }
 // static
 SkPDFFont* SkPDFFont::GetFontResource(SkTypeface* typeface, uint16_t glyphID) {
     SkAutoMutexAcquire lock(CanonicalFontsMutex());
     SkAutoResolveDefaultTypeface autoResolve(typeface);
     typeface = autoResolve.get();
     const uint32_t fontID = typeface->uniqueID();
     int relatedFontIndex;
     if (Find(fontID, glyphID, &relatedFontIndex)) {
         CanonicalFonts()[relatedFontIndex].fFont->ref();
         return CanonicalFonts()[relatedFontIndex].fFont;
     }
     SkAutoTUnref<SkAdvancedTypefaceMetrics> fontMetrics;
     SkPDFDict* relatedFontDescriptor = NULL;
     if (relatedFontIndex >= 0) {
         SkPDFFont* relatedFont = CanonicalFonts()[relatedFontIndex].fFont;
         fontMetrics.reset(relatedFont->fontInfo());
         SkSafeRef(fontMetrics.get());
         relatedFontDescriptor = relatedFont->getFontDescriptor();
         // This only is to catch callers who pass invalid glyph ids.
         // If glyph id is invalid, then we will create duplicate entries
         // for True Type fonts.
         SkAdvancedTypefaceMetrics::FontType fontType =
             fontMetrics.get() ? fontMetrics.get()->fType :
                                 SkAdvancedTypefaceMetrics::kOther_Font;
         if (fontType == SkAdvancedTypefaceMetrics::kType1CID_Font ||
             fontType == SkAdvancedTypefaceMetrics::kTrueType_Font) {
             CanonicalFonts()[relatedFontIndex].fFont->ref();
             return CanonicalFonts()[relatedFontIndex].fFont;
         }
     } else {
         SkAdvancedTypefaceMetrics::PerGlyphInfo info;
         info = SkAdvancedTypefaceMetrics::kGlyphNames_PerGlyphInfo;
         info = SkTBitOr<SkAdvancedTypefaceMetrics::PerGlyphInfo>(
                   info, SkAdvancedTypefaceMetrics::kToUnicode_PerGlyphInfo);
 #if !defined (SK_SFNTLY_SUBSETTER)
         info = SkTBitOr<SkAdvancedTypefaceMetrics::PerGlyphInfo>(
                   info, SkAdvancedTypefaceMetrics::kHAdvance_PerGlyphInfo);
 #endif
         fontMetrics.reset(
             typeface->getAdvancedTypefaceMetrics(info, NULL, 0));
 #if defined (SK_SFNTLY_SUBSETTER)
         if (fontMetrics.get() &&
             fontMetrics->fType != SkAdvancedTypefaceMetrics::kTrueType_Font) {
             // Font does not support subsetting, get new info with advance.
             info = SkTBitOr<SkAdvancedTypefaceMetrics::PerGlyphInfo>(
                       info, SkAdvancedTypefaceMetrics::kHAdvance_PerGlyphInfo);
             fontMetrics.reset(
                 typeface->getAdvancedTypefaceMetrics(info, NULL, 0));
         }
 #endif
     }
     SkPDFFont* font = Create(fontMetrics.get(), typeface, glyphID,
                              relatedFontDescriptor);
     FontRec newEntry(font, fontID, font->fFirstGlyphID);
     CanonicalFonts().push(newEntry);
     return font;  // Return the reference new SkPDFFont() created.
 }
 SkPDFFont* SkPDFFont::getFontSubset(const SkPDFGlyphSet*) {
     return NULL;  // Default: no support.
 }
 // static
 SkTDArray<SkPDFFont::FontRec>& SkPDFFont::CanonicalFonts() {
     // This initialization is only thread safe with gcc.
     static SkTDArray<FontRec> gCanonicalFonts;
     return gCanonicalFonts;
 }
 // static
 SkBaseMutex& SkPDFFont::CanonicalFontsMutex() {
     // This initialization is only thread safe with gcc, or when
     // POD-style mutex initialization is used.
     SK_DECLARE_STATIC_MUTEX(gCanonicalFontsMutex);
     return gCanonicalFontsMutex;
 }
 // static
 bool SkPDFFont::Find(uint32_t fontID, uint16_t glyphID, int* index) {
     // TODO(vandebo): Optimize this, do only one search?
     FontRec search(NULL, fontID, glyphID);
     *index = CanonicalFonts().find(search);
     if (*index >= 0) {
         return true;
     }
     search.fGlyphID = 0;
     *index = CanonicalFonts().find(search);
     return false;
 }
 SkPDFFont::SkPDFFont(SkAdvancedTypefaceMetrics* info, SkTypeface* typeface,
                      SkPDFDict* relatedFontDescriptor)
         : SkPDFDict("Font"),
           fTypeface(ref_or_default(typeface)),
           fFirstGlyphID(1),
           fLastGlyphID(info ? info->fLastGlyphID : 0),
           fFontInfo(SkSafeRef(info)),
           fDescriptor(SkSafeRef(relatedFontDescriptor)) {
     if (info == NULL) {
         fFontType = SkAdvancedTypefaceMetrics::kNotEmbeddable_Font;
     } else if (info->fMultiMaster) {
         fFontType = SkAdvancedTypefaceMetrics::kOther_Font;
     } else {
         fFontType = info->fType;
     }
 }
 // static
 SkPDFFont* SkPDFFont::Create(SkAdvancedTypefaceMetrics* info,
                              SkTypeface* typeface, uint16_t glyphID,
                              SkPDFDict* relatedFontDescriptor) {
     SkAdvancedTypefaceMetrics::FontType type =
         info ? info->fType : SkAdvancedTypefaceMetrics::kNotEmbeddable_Font;
     if (info && info->fMultiMaster) {
         NOT_IMPLEMENTED(true, true);
         return new SkPDFType3Font(info,
                                   typeface,
                                   glyphID);
     }
     if (type == SkAdvancedTypefaceMetrics::kType1CID_Font ||
         type == SkAdvancedTypefaceMetrics::kTrueType_Font) {
         SkASSERT(relatedFontDescriptor == NULL);
         return new SkPDFType0Font(info, typeface);
     }
     if (type == SkAdvancedTypefaceMetrics::kType1_Font) {
         return new SkPDFType1Font(info,
                                   typeface,
                                   glyphID,
                                   relatedFontDescriptor);
     }
     SkASSERT(type == SkAdvancedTypefaceMetrics::kCFF_Font ||
              type == SkAdvancedTypefaceMetrics::kOther_Font ||
              type == SkAdvancedTypefaceMetrics::kNotEmbeddable_Font);
     return new SkPDFType3Font(info, typeface, glyphID);
 }
 SkAdvancedTypefaceMetrics* SkPDFFont::fontInfo() {
     return fFontInfo.get();
 }
 void SkPDFFont::setFontInfo(SkAdvancedTypefaceMetrics* info) {
     if (info == NULL || info == fFontInfo.get()) {
         return;
     }
     fFontInfo.reset(info);
     SkSafeRef(info);
 }
 uint16_t SkPDFFont::firstGlyphID() const {
     return fFirstGlyphID;
 }
 uint16_t SkPDFFont::lastGlyphID() const {
     return fLastGlyphID;
 }
 void SkPDFFont::setLastGlyphID(uint16_t glyphID) {
     fLastGlyphID = glyphID;
 }
 void SkPDFFont::addResource(SkPDFObject* object) {
     SkASSERT(object != NULL);
     fResources.push(object);
     object->ref();
 }
 SkPDFDict* SkPDFFont::getFontDescriptor() {
     return fDescriptor.get();
 }
 void SkPDFFont::setFontDescriptor(SkPDFDict* descriptor) {
     fDescriptor.reset(descriptor);
     SkSafeRef(descriptor);
 }
 bool SkPDFFont::addCommonFontDescriptorEntries(int16_t defaultWidth) {
     if (fDescriptor.get() == NULL) {
         return false;
     }
     const uint16_t emSize = fFontInfo->fEmSize;
     fDescriptor->insertName("FontName", fFontInfo->fFontName);
     fDescriptor->insertInt("Flags", fFontInfo->fStyle | kPdfSymbolic);
     fDescriptor->insertScalar("Ascent",
             scaleFromFontUnits(fFontInfo->fAscent, emSize));
     fDescriptor->insertScalar("Descent",
             scaleFromFontUnits(fFontInfo->fDescent, emSize));
     fDescriptor->insertScalar("StemV",
             scaleFromFontUnits(fFontInfo->fStemV, emSize));
     fDescriptor->insertScalar("CapHeight",
             scaleFromFontUnits(fFontInfo->fCapHeight, emSize));
     fDescriptor->insertInt("ItalicAngle", fFontInfo->fItalicAngle);
     fDescriptor->insert("FontBBox", makeFontBBox(fFontInfo->fBBox,
                                                  fFontInfo->fEmSize))->unref();
     if (defaultWidth > 0) {
         fDescriptor->insertScalar("MissingWidth",
                 scaleFromFontUnits(defaultWidth, emSize));
     }
     return true;
 }
 void SkPDFFont::adjustGlyphRangeForSingleByteEncoding(int16_t glyphID) {
     // Single byte glyph encoding supports a max of 255 glyphs.
     fFirstGlyphID = glyphID - (glyphID - 1) % 255;
     if (fLastGlyphID > fFirstGlyphID + 255 - 1) {
         fLastGlyphID = fFirstGlyphID + 255 - 1;
     }
 }
 bool SkPDFFont::FontRec::operator==(const SkPDFFont::FontRec& b) const {
     if (fFontID != b.fFontID) {
         return false;
     }
     if (fFont != NULL && b.fFont != NULL) {
         return fFont->fFirstGlyphID == b.fFont->fFirstGlyphID &&
             fFont->fLastGlyphID == b.fFont->fLastGlyphID;
     }
     if (fGlyphID == 0 || b.fGlyphID == 0) {
         return true;
     }
     if (fFont != NULL) {
         return fFont->fFirstGlyphID <= b.fGlyphID &&
             b.fGlyphID <= fFont->fLastGlyphID;
     } else if (b.fFont != NULL) {
         return b.fFont->fFirstGlyphID <= fGlyphID &&
             fGlyphID <= b.fFont->fLastGlyphID;
     }
     return fGlyphID == b.fGlyphID;
 }
 SkPDFFont::FontRec::FontRec(SkPDFFont* font, uint32_t fontID, uint16_t glyphID)
     : fFont(font),
       fFontID(fontID),
       fGlyphID(glyphID) {
 }
 void SkPDFFont::populateToUnicodeTable(const SkPDFGlyphSet* subset) {
     if (fFontInfo == NULL || fFontInfo->fGlyphToUnicode.begin() == NULL) {
         return;
     }
     SkAutoTUnref<SkPDFStream> pdfCmap(
         generate_tounicode_cmap(fFontInfo->fGlyphToUnicode, subset,
                                 multiByteGlyphs(), firstGlyphID(),
                                 lastGlyphID()));
     addResource(pdfCmap.get());
     insert("ToUnicode", new SkPDFObjRef(pdfCmap.get()))->unref();
 }
 ///////////////////////////////////////////////////////////////////////////////
 // class SkPDFType0Font
 ///////////////////////////////////////////////////////////////////////////////
 SkPDFType0Font::SkPDFType0Font(SkAdvancedTypefaceMetrics* info,
                                SkTypeface* typeface)
         : SkPDFFont(info, typeface, NULL) {
     SkDEBUGCODE(fPopulated = false);
 }
 SkPDFType0Font::~SkPDFType0Font() {}
 SkPDFFont* SkPDFType0Font::getFontSubset(const SkPDFGlyphSet* subset) {
     SkPDFType0Font* newSubset = new SkPDFType0Font(fontInfo(), typeface());
     newSubset->populate(subset);
     return newSubset;
 }
 #ifdef SK_DEBUG
 void SkPDFType0Font::emitObject(SkWStream* stream, SkPDFCatalog* catalog,
                                 bool indirect) {
     SkASSERT(fPopulated);
     return INHERITED::emitObject(stream, catalog, indirect);
 }
 #endif
 bool SkPDFType0Font::populate(const SkPDFGlyphSet* subset) {
     insertName("Subtype", "Type0");
     insertName("BaseFont", fontInfo()->fFontName);
     insertName("Encoding", "Identity-H");
     SkAutoTUnref<SkPDFCIDFont> newCIDFont(
             new SkPDFCIDFont(fontInfo(), typeface(), subset));
     addResource(newCIDFont.get());
     SkAutoTUnref<SkPDFArray> descendantFonts(new SkPDFArray());
     descendantFonts->append(new SkPDFObjRef(newCIDFont.get()))->unref();
     insert("DescendantFonts", descendantFonts.get());
     populateToUnicodeTable(subset);
     SkDEBUGCODE(fPopulated = true);
     return true;
 }
 ///////////////////////////////////////////////////////////////////////////////
 // class SkPDFCIDFont
 ///////////////////////////////////////////////////////////////////////////////
 SkPDFCIDFont::SkPDFCIDFont(SkAdvancedTypefaceMetrics* info,
                            SkTypeface* typeface, const SkPDFGlyphSet* subset)
         : SkPDFFont(info, typeface, NULL) {
     populate(subset);
 }
 SkPDFCIDFont::~SkPDFCIDFont() {}
 bool SkPDFCIDFont::addFontDescriptor(int16_t defaultWidth,
                                      const SkTDArray<uint32_t>* subset) {
     SkAutoTUnref<SkPDFDict> descriptor(new SkPDFDict("FontDescriptor"));
     setFontDescriptor(descriptor.get());
     addResource(descriptor.get());
     switch (getType()) {
         case SkAdvancedTypefaceMetrics::kTrueType_Font: {
             SkASSERT(subset);
             // Font subsetting
             SkPDFStream* rawStream = NULL;
             int fontSize = get_subset_font_stream(fontInfo()->fFontName.c_str(),
                                                   typeface(),
                                                   *subset,
                                                   &rawStream);
             SkASSERT(fontSize);
             SkASSERT(rawStream);
             SkAutoTUnref<SkPDFStream> fontStream(rawStream);
             addResource(fontStream.get());
             fontStream->insertInt("Length1", fontSize);
             descriptor->insert("FontFile2",
                                new SkPDFObjRef(fontStream.get()))->unref();
             break;
         }
         case SkAdvancedTypefaceMetrics::kCFF_Font:
         case SkAdvancedTypefaceMetrics::kType1CID_Font: {
             int ttcIndex;
             SkAutoTUnref<SkStream> fontData(typeface()->openStream(&ttcIndex));
             SkAutoTUnref<SkPDFStream> fontStream(
                 new SkPDFStream(fontData.get()));
             addResource(fontStream.get());
             if (getType() == SkAdvancedTypefaceMetrics::kCFF_Font) {
                 fontStream->insertName("Subtype", "Type1C");
             } else {
                 fontStream->insertName("Subtype", "CIDFontType0c");
             }
             descriptor->insert("FontFile3",
                                 new SkPDFObjRef(fontStream.get()))->unref();
             break;
         }
         default:
             SkASSERT(false);
     }
     insert("FontDescriptor", new SkPDFObjRef(descriptor.get()))->unref();
     return addCommonFontDescriptorEntries(defaultWidth);
 }
 bool SkPDFCIDFont::populate(const SkPDFGlyphSet* subset) {
     // Generate new font metrics with advance info for true type fonts.
     if (fontInfo()->fType == SkAdvancedTypefaceMetrics::kTrueType_Font) {
         // Generate glyph id array.
         SkTDArray<uint32_t> glyphIDs;
         if (subset) {
             // Always include glyph 0.
             if (!subset->has(0)) {
                 glyphIDs.push(0);
             }
             subset->exportTo(&glyphIDs);
         }
         SkAdvancedTypefaceMetrics::PerGlyphInfo info;
         info = SkAdvancedTypefaceMetrics::kGlyphNames_PerGlyphInfo;
         info = SkTBitOr<SkAdvancedTypefaceMetrics::PerGlyphInfo>(
                   info, SkAdvancedTypefaceMetrics::kHAdvance_PerGlyphInfo);
         uint32_t* glyphs = (glyphIDs.count() == 0) ? NULL : glyphIDs.begin();
         uint32_t glyphsCount = glyphs ? glyphIDs.count() : 0;
         SkAutoTUnref<SkAdvancedTypefaceMetrics> fontMetrics(
             typeface()->getAdvancedTypefaceMetrics(info, glyphs, glyphsCount));
         setFontInfo(fontMetrics.get());
         addFontDescriptor(0, &glyphIDs);
     } else {
         // Other CID fonts
         addFontDescriptor(0, NULL);
     }
     insertName("BaseFont", fontInfo()->fFontName);
     if (getType() == SkAdvancedTypefaceMetrics::kType1CID_Font) {
         insertName("Subtype", "CIDFontType0");
     } else if (getType() == SkAdvancedTypefaceMetrics::kTrueType_Font) {
         insertName("Subtype", "CIDFontType2");
         insertName("CIDToGIDMap", "Identity");
     } else {
         SkASSERT(false);
     }
     SkAutoTUnref<SkPDFDict> sysInfo(new SkPDFDict);
     sysInfo->insert("Registry", new SkPDFString("Adobe"))->unref();
     sysInfo->insert("Ordering", new SkPDFString("Identity"))->unref();
     sysInfo->insertInt("Supplement", 0);
     insert("CIDSystemInfo", sysInfo.get());
     if (fontInfo()->fGlyphWidths.get()) {
         int16_t defaultWidth = 0;
         SkAutoTUnref<SkPDFArray> widths(
             composeAdvanceData(fontInfo()->fGlyphWidths.get(),
                                fontInfo()->fEmSize, &appendWidth,
                                &defaultWidth));
         if (widths->size())
             insert("W", widths.get());
         if (defaultWidth != 0) {
             insertScalar("DW", scaleFromFontUnits(defaultWidth,
                                                   fontInfo()->fEmSize));
         }
     }
     if (fontInfo()->fVerticalMetrics.get()) {
         struct SkAdvancedTypefaceMetrics::VerticalMetric defaultAdvance;
         defaultAdvance.fVerticalAdvance = 0;
         defaultAdvance.fOriginXDisp = 0;
         defaultAdvance.fOriginYDisp = 0;
         SkAutoTUnref<SkPDFArray> advances(
             composeAdvanceData(fontInfo()->fVerticalMetrics.get(),
                                fontInfo()->fEmSize, &appendVerticalAdvance,
                                &defaultAdvance));
         if (advances->size())
             insert("W2", advances.get());
         if (defaultAdvance.fVerticalAdvance ||
                 defaultAdvance.fOriginXDisp ||
                 defaultAdvance.fOriginYDisp) {
             insert("DW2", appendVerticalAdvance(defaultAdvance,
                                                 fontInfo()->fEmSize,
                                                 new SkPDFArray))->unref();
         }
     }
     return true;
 }
 ///////////////////////////////////////////////////////////////////////////////
 // class SkPDFType1Font
 ///////////////////////////////////////////////////////////////////////////////
 SkPDFType1Font::SkPDFType1Font(SkAdvancedTypefaceMetrics* info,
                                SkTypeface* typeface,
                                uint16_t glyphID,
                                SkPDFDict* relatedFontDescriptor)
         : SkPDFFont(info, typeface, relatedFontDescriptor) {
     populate(glyphID);
 }
 SkPDFType1Font::~SkPDFType1Font() {}
 bool SkPDFType1Font::addFontDescriptor(int16_t defaultWidth) {
     if (getFontDescriptor() != NULL) {
         SkPDFDict* descriptor = getFontDescriptor();
         addResource(descriptor);
         insert("FontDescriptor", new SkPDFObjRef(descriptor))->unref();
         return true;
     }
     SkAutoTUnref<SkPDFDict> descriptor(new SkPDFDict("FontDescriptor"));
     setFontDescriptor(descriptor.get());
     int ttcIndex;
     size_t header SK_INIT_TO_AVOID_WARNING;
     size_t data SK_INIT_TO_AVOID_WARNING;
     size_t trailer SK_INIT_TO_AVOID_WARNING;
     SkAutoTUnref<SkStream> rawFontData(typeface()->openStream(&ttcIndex));
     SkStream* fontData = handleType1Stream(rawFontData.get(), &header, &data,
                                            &trailer);
     if (fontData == NULL) {
         return false;
     }
     SkAutoTUnref<SkPDFStream> fontStream(new SkPDFStream(fontData));
     addResource(fontStream.get());
     fontStream->insertInt("Length1", header);
     fontStream->insertInt("Length2", data);
     fontStream->insertInt("Length3", trailer);
     descriptor->insert("FontFile", new SkPDFObjRef(fontStream.get()))->unref();
     addResource(descriptor.get());
     insert("FontDescriptor", new SkPDFObjRef(descriptor.get()))->unref();
     return addCommonFontDescriptorEntries(defaultWidth);
 }
 bool SkPDFType1Font::populate(int16_t glyphID) {
     SkASSERT(!fontInfo()->fVerticalMetrics.get());
     SkASSERT(fontInfo()->fGlyphWidths.get());
     adjustGlyphRangeForSingleByteEncoding(glyphID);
     int16_t defaultWidth = 0;
     const SkAdvancedTypefaceMetrics::WidthRange* widthRangeEntry = NULL;
     const SkAdvancedTypefaceMetrics::WidthRange* widthEntry;
     for (widthEntry = fontInfo()->fGlyphWidths.get();
             widthEntry != NULL;
             widthEntry = widthEntry->fNext.get()) {
         switch (widthEntry->fType) {
             case SkAdvancedTypefaceMetrics::WidthRange::kDefault:
                 defaultWidth = widthEntry->fAdvance[0];
                 break;
             case SkAdvancedTypefaceMetrics::WidthRange::kRun:
                 SkASSERT(false);
                 break;
             case SkAdvancedTypefaceMetrics::WidthRange::kRange:
                 SkASSERT(widthRangeEntry == NULL);
                 widthRangeEntry = widthEntry;
                 break;
         }
     }
     if (!addFontDescriptor(defaultWidth)) {
         return false;
     }
     insertName("Subtype", "Type1");
     insertName("BaseFont", fontInfo()->fFontName);
     addWidthInfoFromRange(defaultWidth, widthRangeEntry);
     SkAutoTUnref<SkPDFDict> encoding(new SkPDFDict("Encoding"));
     insert("Encoding", encoding.get());
     SkAutoTUnref<SkPDFArray> encDiffs(new SkPDFArray);
     encoding->insert("Differences", encDiffs.get());
     encDiffs->reserve(lastGlyphID() - firstGlyphID() + 2);
     encDiffs->appendInt(1);
     for (int gID = firstGlyphID(); gID <= lastGlyphID(); gID++) {
         encDiffs->appendName(fontInfo()->fGlyphNames->get()[gID].c_str());
     }
     return true;
 }
 void SkPDFType1Font::addWidthInfoFromRange(
         int16_t defaultWidth,
         const SkAdvancedTypefaceMetrics::WidthRange* widthRangeEntry) {
     SkAutoTUnref<SkPDFArray> widthArray(new SkPDFArray());
     int firstChar = 0;
     if (widthRangeEntry) {
         const uint16_t emSize = fontInfo()->fEmSize;
         int startIndex = firstGlyphID() - widthRangeEntry->fStartId;
         int endIndex = startIndex + lastGlyphID() - firstGlyphID() + 1;
         if (startIndex < 0)
             startIndex = 0;
         if (endIndex > widthRangeEntry->fAdvance.count())
             endIndex = widthRangeEntry->fAdvance.count();
         if (widthRangeEntry->fStartId == 0) {
             appendWidth(widthRangeEntry->fAdvance[0], emSize, widthArray.get());
         } else {
             firstChar = startIndex + widthRangeEntry->fStartId;
         }
         for (int i = startIndex; i < endIndex; i++) {
             appendWidth(widthRangeEntry->fAdvance[i], emSize, widthArray.get());
         }
     } else {
         appendWidth(defaultWidth, 1000, widthArray.get());
     }
     insertInt("FirstChar", firstChar);
     insertInt("LastChar", firstChar + widthArray->size() - 1);
     insert("Widths", widthArray.get());
 }
 ///////////////////////////////////////////////////////////////////////////////
 // class SkPDFType3Font
 ///////////////////////////////////////////////////////////////////////////////
 SkPDFType3Font::SkPDFType3Font(SkAdvancedTypefaceMetrics* info,
                                SkTypeface* typeface,
                                uint16_t glyphID)
         : SkPDFFont(info, typeface, NULL) {
     populate(glyphID);
 }
 SkPDFType3Font::~SkPDFType3Font() {}
 bool SkPDFType3Font::populate(int16_t glyphID) {
     SkPaint paint;
     paint.setTypeface(typeface());
     paint.setTextSize(1000);
     SkAutoGlyphCache autoCache(paint, NULL, NULL);
     SkGlyphCache* cache = autoCache.getCache();
     // If fLastGlyphID isn't set (because there is not fFontInfo), look it up.
     if (lastGlyphID() == 0) {
         setLastGlyphID(cache->getGlyphCount() - 1);
     }
     adjustGlyphRangeForSingleByteEncoding(glyphID);
     insertName("Subtype", "Type3");
     // Flip about the x-axis and scale by 1/1000.
     SkMatrix fontMatrix;
     fontMatrix.setScale(SkScalarInvert(1000), -SkScalarInvert(1000));
     insert("FontMatrix", SkPDFUtils::MatrixToArray(fontMatrix))->unref();
     SkAutoTUnref<SkPDFDict> charProcs(new SkPDFDict);
     insert("CharProcs", charProcs.get());
     SkAutoTUnref<SkPDFDict> encoding(new SkPDFDict("Encoding"));
     insert("Encoding", encoding.get());
     SkAutoTUnref<SkPDFArray> encDiffs(new SkPDFArray);
     encoding->insert("Differences", encDiffs.get());
     encDiffs->reserve(lastGlyphID() - firstGlyphID() + 2);
     encDiffs->appendInt(1);
     SkAutoTUnref<SkPDFArray> widthArray(new SkPDFArray());
     SkIRect bbox = SkIRect::MakeEmpty();
     for (int gID = firstGlyphID(); gID <= lastGlyphID(); gID++) {
         SkString characterName;
         characterName.printf("gid%d", gID);
         encDiffs->appendName(characterName.c_str());
         const SkGlyph& glyph = cache->getGlyphIDMetrics(gID);
         widthArray->appendScalar(SkFixedToScalar(glyph.fAdvanceX));
         SkIRect glyphBBox = SkIRect::MakeXYWH(glyph.fLeft, glyph.fTop,
                                               glyph.fWidth, glyph.fHeight);
         bbox.join(glyphBBox);
         SkDynamicMemoryWStream content;
         setGlyphWidthAndBoundingBox(SkFixedToScalar(glyph.fAdvanceX), glyphBBox,
                                     &content);
         const SkPath* path = cache->findPath(glyph);
         if (path) {
             SkPDFUtils::EmitPath(*path, paint.getStyle(), &content);
             SkPDFUtils::PaintPath(paint.getStyle(), path->getFillType(),
                                   &content);
         }
         SkAutoTUnref<SkMemoryStream> glyphStream(new SkMemoryStream());
         glyphStream->setData(content.copyToData())->unref();
         SkAutoTUnref<SkPDFStream> glyphDescription(
             new SkPDFStream(glyphStream.get()));
         addResource(glyphDescription.get());
         charProcs->insert(characterName.c_str(),
                           new SkPDFObjRef(glyphDescription.get()))->unref();
     }
     insert("FontBBox", makeFontBBox(bbox, 1000))->unref();
     insertInt("FirstChar", 1);
     insertInt("LastChar", lastGlyphID() - firstGlyphID() + 1);
     insert("Widths", widthArray.get());
     insertName("CIDToGIDMap", "Identity");
     populateToUnicodeTable(NULL);
     return true;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/pdf/SkPDFFont.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/pdf/SkPDFFont.cpp