Exemplo n.º 1
0
FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
{
    ASSERT_ARG(buffer, buffer);

#if ENABLE(OPENTYPE_SANITIZER)
    OpenTypeSanitizer sanitizer(buffer);
    RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
    if (!transcodeBuffer)
        return 0; // validation failed.
    buffer = transcodeBuffer.get();
#endif

#if OS(WINDOWS)
    // Introduce the font to GDI. AddFontMemResourceEx should be used with care, because it will pollute the process's
    // font namespace (Windows has no API for creating an HFONT from data without exposing the font to the
    // entire process first).
    String fontName = createUniqueFontName();
    HANDLE fontReference = renameAndActivateFont(buffer, fontName);
    if (!fontReference)
        return 0;
    return new FontCustomPlatformData(fontReference, fontName);
#elif OS(UNIX) || PLATFORM(BREWMP)
    RemoteFontStream* stream = new RemoteFontStream(buffer);
    SkTypeface* typeface = SkTypeface::CreateFromStream(stream);
    stream->unref();
    if (!typeface)
        return 0;
    return new FontCustomPlatformData(typeface);
#else
    notImplemented();
    return 0;
#endif
}
FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
{
    ASSERT_ARG(buffer, buffer);

#if USE(OPENTYPE_SANITIZER)
    OpenTypeSanitizer sanitizer(buffer);
    RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
    if (!transcodeBuffer)
        return 0; // validation failed.
    buffer = transcodeBuffer.get();
#else
    RefPtr<SharedBuffer> sfntBuffer;
    if (isWOFF(buffer)) {
        Vector<char> sfnt;
        if (!convertWOFFToSfnt(buffer, sfnt))
            return 0;

        sfntBuffer = SharedBuffer::adoptVector(sfnt);
        buffer = sfntBuffer.get();
    }
#endif

    ATSFontContainerRef containerRef = 0;

    RetainPtr<CGFontRef> cgFontRef;

#ifndef BUILDING_ON_LEOPARD
    RetainPtr<CFDataRef> bufferData(AdoptCF, buffer->createCFData());
    RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateWithCFData(bufferData.get()));

    cgFontRef.adoptCF(CGFontCreateWithDataProvider(dataProvider.get()));
    if (!cgFontRef)
        return 0;
#else
    // Use ATS to activate the font.

    // The value "3" means that the font is private and can't be seen by anyone else.
    ATSFontActivateFromMemory((void*)buffer->data(), buffer->size(), 3, kATSFontFormatUnspecified, NULL, kATSOptionFlagsDefault, &containerRef);
    if (!containerRef)
        return 0;
    ItemCount fontCount;
    ATSFontFindFromContainer(containerRef, kATSOptionFlagsDefault, 0, NULL, &fontCount);
    
    // We just support the first font in the list.
    if (fontCount == 0) {
        ATSFontDeactivate(containerRef, NULL, kATSOptionFlagsDefault);
        return 0;
    }
    
    ATSFontRef fontRef = 0;
    ATSFontFindFromContainer(containerRef, kATSOptionFlagsDefault, 1, &fontRef, NULL);
    if (!fontRef) {
        ATSFontDeactivate(containerRef, NULL, kATSOptionFlagsDefault);
        return 0;
    }
    
    cgFontRef.adoptCF(CGFontCreateWithPlatformFont(&fontRef));
    // Workaround for <rdar://problem/5675504>.
    if (cgFontRef && !CGFontGetNumberOfGlyphs(cgFontRef.get()))
        cgFontRef = 0;
    if (!cgFontRef) {
        ATSFontDeactivate(containerRef, NULL, kATSOptionFlagsDefault);
        return 0;
    }
#endif // !defined(BUILDING_ON_LEOPARD)

    FontCustomPlatformData* fontCustomPlatformData = new FontCustomPlatformData(containerRef, cgFontRef.releaseRef());
#if USE(SKIA_ON_MAC_CHROMIUM)
    RemoteFontStream* stream = new RemoteFontStream(buffer);
    fontCustomPlatformData->m_typeface = SkTypeface::CreateFromStream(stream);
    stream->unref();
#endif
    return fontCustomPlatformData;
}