FontCustomPlatformData.cpp [plain text]
#include "config.h"
#include "FontCustomPlatformData.h"
#include "FontPlatformData.h"
#include "OpenTypeSanitizer.h"
#include "SharedBuffer.h"
#include "WOFFFileFormat.h"
#include <ApplicationServices/ApplicationServices.h>
#if USE(SKIA_ON_MAC_CHROMIUM)
#include "SkStream.h"
#include "SkTypeface.h"
#endif
namespace WebCore {
#if USE(SKIA_ON_MAC_CHROMIUM)
class RemoteFontStream : public SkStream {
public:
explicit RemoteFontStream(PassRefPtr<SharedBuffer> buffer)
: m_buffer(buffer)
, m_offset(0)
{
}
virtual ~RemoteFontStream()
{
}
virtual bool rewind()
{
m_offset = 0;
return true;
}
virtual size_t read(void* buffer, size_t size)
{
if (!buffer && !size) {
return m_buffer->size();
}
if (!m_buffer->data() || !m_buffer->size())
return 0;
size_t left = m_buffer->size() - m_offset;
size_t bytesToConsume = std::min(left, size);
if (buffer)
std::memcpy(buffer, m_buffer->data() + m_offset, bytesToConsume);
m_offset += bytesToConsume;
return bytesToConsume;
}
private:
RefPtr<SharedBuffer> m_buffer;
size_t m_offset;
};
#endif
FontCustomPlatformData::~FontCustomPlatformData()
{
#ifdef BUILDING_ON_LEOPARD
if (m_atsContainer)
ATSFontDeactivate(m_atsContainer, NULL, kATSOptionFlagsDefault);
#endif
#if USE(SKIA_ON_MAC_CHROMIUM)
SkSafeUnref(m_typeface);
#endif
CGFontRelease(m_cgFont);
}
FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation orientation, TextOrientation textOrientation, FontWidthVariant widthVariant, FontRenderingMode)
{
return FontPlatformData(m_cgFont, size, bold, italic, orientation, textOrientation, widthVariant);
}
FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
{
ASSERT_ARG(buffer, buffer);
#if USE(OPENTYPE_SANITIZER)
OpenTypeSanitizer sanitizer(buffer);
RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
if (!transcodeBuffer)
return 0; 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
ATSFontActivateFromMemory((void*)buffer->data(), buffer->size(), 3, kATSFontFormatUnspecified, NULL, kATSOptionFlagsDefault, &containerRef);
if (!containerRef)
return 0;
ItemCount fontCount;
ATSFontFindFromContainer(containerRef, kATSOptionFlagsDefault, 0, NULL, &fontCount);
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));
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.leakRef());
#if USE(SKIA_ON_MAC_CHROMIUM)
RemoteFontStream* stream = new RemoteFontStream(buffer);
fontCustomPlatformData->m_typeface = SkTypeface::CreateFromStream(stream);
stream->unref();
#endif
return fontCustomPlatformData;
}
bool FontCustomPlatformData::supportsFormat(const String& format)
{
return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || equalIgnoringCase(format, "woff");
}
}