root/Source/platform/fonts/skia/FontCustomPlatformDataSkia.cpp

DEFINITIONS

1. fontPlatformData
2. create
3. supportsFormat

/*
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 * Copyright (c) 2007, 2008, 2009, Google Inc. All rights reserved.
 * Copyright (C) 2010 Company 100, Inc.
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 *
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#include "config.h"
#include "platform/fonts/FontCustomPlatformData.h"

#include "platform/LayoutTestSupport.h"
#include "platform/SharedBuffer.h"
#include "platform/fonts/FontCache.h"
#include "platform/fonts/FontPlatformData.h"
#include "platform/fonts/opentype/OpenTypeSanitizer.h"
#include "third_party/skia/include/core/SkStream.h"
#include "third_party/skia/include/core/SkTypeface.h"
#include "wtf/PassOwnPtr.h"

namespace WebCore {

FontCustomPlatformData::FontCustomPlatformData(PassRefPtr<SkTypeface> typeface)
    : m_typeface(typeface)
{
}

FontCustomPlatformData::~FontCustomPlatformData()
{
}

FontPlatformData FontCustomPlatformData::fontPlatformData(float size, bool bold, bool italic, FontOrientation orientation, FontWidthVariant)
{
    ASSERT(m_typeface);
#if OS(WIN)
    // FIXME: Skia currently renders synthetic bold and italics with hinting and without
    // linear metrics on windows. Using CreateFromName and specifying the bold/italics
    // style allows for proper rendering of synthetic style. Once Skia has been updated
    // this workaround will no longer be needed. crbug.com/332958
    bool syntheticBold = bold && !m_typeface->isBold();
    bool syntheticItalic = italic && !m_typeface->isItalic();
    if (syntheticBold || syntheticItalic) {
        SkString name;
        m_typeface->getFamilyName(&name);

        int style = SkTypeface::kNormal;
        if (syntheticBold)
            style |= SkTypeface::kBold;
        if (syntheticItalic)
            style |= SkTypeface::kItalic;

        RefPtr<SkTypeface> typeface = adoptRef(FontCache::fontCache()->fontManager()->legacyCreateTypeface(name.c_str(), static_cast<SkTypeface::Style>(style)));
        syntheticBold = false;
        syntheticItalic = false;
        return FontPlatformData(typeface.release(), "", size, syntheticBold, syntheticItalic, orientation);
    }
#endif
    return FontPlatformData(m_typeface.get(), "", size, bold && !m_typeface->isBold(), italic && !m_typeface->isItalic(), orientation);
}

PassOwnPtr<FontCustomPlatformData> FontCustomPlatformData::create(SharedBuffer* buffer)
{
    ASSERT_ARG(buffer, buffer);

    OpenTypeSanitizer sanitizer(buffer);
    RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
    if (!transcodeBuffer)
        return nullptr; // validation failed.
    buffer = transcodeBuffer.get();

    RefPtr<SkMemoryStream> stream = adoptRef(new SkMemoryStream(buffer->getAsSkData().get()));
#if OS(WIN)
    RefPtr<SkTypeface> typeface = adoptRef(FontCache::fontCache()->fontManager()->createFromStream(stream.get()));
#else
    RefPtr<SkTypeface> typeface = adoptRef(SkTypeface::CreateFromStream(stream.get()));
#endif
    if (!typeface)
        return nullptr;

    return adoptPtr(new FontCustomPlatformData(typeface.release()));
}

bool FontCustomPlatformData::supportsFormat(const String& format)
{
    return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || OpenTypeSanitizer::supportsFormat(format);
}

}