| /* |
| * 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 superceded 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, |
| uint16_t firstGlyphID, |
| uint16_t lastGlyphID); |
| |
| void append_cmap_sections(const SkTDArray<SkUnichar>& glyphToUnicode, |
| const SkPDFGlyphSet* subset, |
| SkDynamicMemoryWStream* cmap, |
| uint16_t firstGlyphID, |
| uint16_t lastGlyphID) { |
| if (glyphToUnicode.isEmpty()) { |
| return; |
| } |
| |
| SkTDArray<BFChar> bfcharEntries; |
| SkTDArray<BFRange> bfrangeEntries; |
| |
| BFRange currentRangeEntry = {0, 0, 0}; |
| bool rangeEmpty = true; |
| const int limit = SkMin32(lastGlyphID + 1, glyphToUnicode.count()); |
| |
| for (int i = firstGlyphID; i < limit + 1; ++i) { |
| bool inSubset = i < limit && |
| (subset == NULL || subset->has(i)); |
| 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] == 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]; |
| 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, |
| uint16_t firstGlyphID, |
| uint16_t lastGlyphID) { |
| SkDynamicMemoryWStream cmap; |
| append_tounicode_header(&cmap, firstGlyphID, lastGlyphID); |
| append_cmap_sections(glyphToUnicode, subset, &cmap, |
| 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(info), |
| fDescriptor(relatedFontDescriptor) { |
| SkSafeRef(info); |
| 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, |
| 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; |
| glyphIDs.push(0); // Always include glyph 0. |
| if (subset) { |
| subset->exportTo(&glyphIDs); |
| } |
| |
| SkAdvancedTypefaceMetrics::PerGlyphInfo info; |
| info = SkAdvancedTypefaceMetrics::kGlyphNames_PerGlyphInfo; |
| info = SkTBitOr<SkAdvancedTypefaceMetrics::PerGlyphInfo>( |
| info, SkAdvancedTypefaceMetrics::kHAdvance_PerGlyphInfo); |
| uint32_t* glyphs = (glyphIDs.count() == 1) ? 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", firstGlyphID()); |
| insertInt("LastChar", lastGlyphID()); |
| insert("Widths", widthArray.get()); |
| insertName("CIDToGIDMap", "Identity"); |
| |
| populateToUnicodeTable(NULL); |
| return true; |
| } |
