src/third_party/WebKit/Source/platform/fonts/skia/FontCustomPlatformDataSkia.cpp

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  32
  33 #include "config.h"
  34 #include "platform/fonts/FontCustomPlatformData.h"
  35
  36 #include "platform/LayoutTestSupport.h"
  37 #include "platform/SharedBuffer.h"
  38 #include "platform/fonts/FontCache.h"
  39 #include "platform/fonts/FontPlatformData.h"
  40 #include "platform/fonts/opentype/OpenTypeSanitizer.h"
  41 #include "third_party/skia/include/core/SkStream.h"
  42 #include "third_party/skia/include/core/SkTypeface.h"
  43 #include "wtf/PassOwnPtr.h"
  44
  45 namespace WebCore {
  46
  47 FontCustomPlatformData::FontCustomPlatformData(PassRefPtr<SkTypeface> typeface)
  48     : m_typeface(typeface)
  49 {
  50 }
  51
  52 FontCustomPlatformData::~FontCustomPlatformData()
  53 {
  54 }
  55
  56 FontPlatformData FontCustomPlatformData::fontPlatformData(float size, bool bold, bool italic, FontOrientation orientation, FontWidthVariant)
  57 {
  58     ASSERT(m_typeface);
  59 #if OS(WIN)
  60     // FIXME: Skia currently renders synthetic bold and italics with hinting and without
  61     // linear metrics on windows. Using CreateFromName and specifying the bold/italics
  62     // style allows for proper rendering of synthetic style. Once Skia has been updated
  63     // this workaround will no longer be needed. crbug.com/332958
  64     bool syntheticBold = bold && !m_typeface->isBold();
  65     bool syntheticItalic = italic && !m_typeface->isItalic();
  66     if (syntheticBold || syntheticItalic) {
  67         SkString name;
  68         m_typeface->getFamilyName(&name);
  69
  70         int style = SkTypeface::kNormal;
  71         if (syntheticBold)
  72             style |= SkTypeface::kBold;
  73         if (syntheticItalic)
  74             style |= SkTypeface::kItalic;
  75
  76         RefPtr<SkTypeface> typeface = adoptRef(FontCache::fontCache()->fontManager()->legacyCreateTypeface(name.c_str(), static_cast<SkTypeface::Style>(style)));
  77         syntheticBold = false;
  78         syntheticItalic = false;
  79         return FontPlatformData(typeface.release(), "", size, syntheticBold, syntheticItalic, orientation);
  80     }
  81 #endif
  82     return FontPlatformData(m_typeface.get(), "", size, bold && !m_typeface->isBold(), italic && !m_typeface->isItalic(), orientation);
  83 }
  84
  85 PassOwnPtr<FontCustomPlatformData> FontCustomPlatformData::create(SharedBuffer* buffer)
  86 {
  87     ASSERT_ARG(buffer, buffer);
  88
  89     OpenTypeSanitizer sanitizer(buffer);
  90     RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
  91     if (!transcodeBuffer)
  92         return nullptr; // validation failed.
  93     buffer = transcodeBuffer.get();
  94
  95     RefPtr<SkMemoryStream> stream = adoptRef(new SkMemoryStream(buffer->getAsSkData().get()));
  96 #if OS(WIN)
  97     RefPtr<SkTypeface> typeface = adoptRef(FontCache::fontCache()->fontManager()->createFromStream(stream.get()));
  98 #else
  99     RefPtr<SkTypeface> typeface = adoptRef(SkTypeface::CreateFromStream(stream.get()));
 100 #endif
 101     if (!typeface)
 102         return nullptr;
 103
 104     return adoptPtr(new FontCustomPlatformData(typeface.release()));
 105 }
 106
 107 bool FontCustomPlatformData::supportsFormat(const String& format)
 108 {
 109     return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || OpenTypeSanitizer::supportsFormat(format);
 110 }
 111
 112 }