FontCustomPlatformData.cpp [plain text]
#include "config.h"
#include "FontCustomPlatformData.h"
#if OS(WINDOWS)
#include "Base64.h"
#include "OpenTypeUtilities.h"
#include "PlatformBridge.h"
#elif OS(UNIX) || PLATFORM(BREWMP)
#include "SkStream.h"
#endif
#include "FontPlatformData.h"
#include "NotImplemented.h"
#include "OpenTypeSanitizer.h"
#include "SharedBuffer.h"
#if OS(WINDOWS)
#include <objbase.h>
#elif OS(UNIX) || PLATFORM(BREWMP)
#include <cstring>
#endif
namespace WebCore {
FontCustomPlatformData::~FontCustomPlatformData()
{
#if OS(WINDOWS)
if (m_fontReference)
RemoveFontMemResourceEx(m_fontReference);
#elif OS(UNIX) || PLATFORM(BREWMP)
if (m_fontReference)
m_fontReference->unref();
#endif
}
FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation orientation,
TextOrientation textOrientation, FontWidthVariant, FontRenderingMode mode)
{
#if OS(WINDOWS)
ASSERT(m_fontReference);
LOGFONT logFont;
if (m_name.length() + 1 >= LF_FACESIZE) {
ASSERT_NOT_REACHED();
return FontPlatformData();
}
memcpy(logFont.lfFaceName, m_name.charactersWithNullTermination(),
sizeof(logFont.lfFaceName[0]) * (1 + m_name.length()));
logFont.lfHeight = -size;
logFont.lfWidth = 0;
logFont.lfEscapement = 0;
logFont.lfOrientation = 0;
logFont.lfUnderline = false;
logFont.lfStrikeOut = false;
logFont.lfCharSet = DEFAULT_CHARSET;
logFont.lfOutPrecision = OUT_TT_ONLY_PRECIS;
logFont.lfQuality = PlatformBridge::layoutTestMode() ?
NONANTIALIASED_QUALITY :
DEFAULT_QUALITY; logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
logFont.lfItalic = italic;
logFont.lfWeight = bold ? 700 : 400;
HFONT hfont = CreateFontIndirect(&logFont);
return FontPlatformData(hfont, size);
#elif OS(UNIX) || PLATFORM(BREWMP)
ASSERT(m_fontReference);
return FontPlatformData(m_fontReference, "", size, bold && !m_fontReference->isBold(), italic && !m_fontReference->isItalic(), orientation, textOrientation);
#else
notImplemented();
return FontPlatformData();
#endif
}
#if OS(WINDOWS)
static String createUniqueFontName()
{
GUID fontUuid;
CoCreateGuid(&fontUuid);
String fontName = base64Encode(reinterpret_cast<char*>(&fontUuid), sizeof(fontUuid));
ASSERT(fontName.length() < LF_FACESIZE);
return fontName;
}
#endif
#if OS(UNIX) || PLATFORM(BREWMP)
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* createFontCustomPlatformData(SharedBuffer* buffer)
{
ASSERT_ARG(buffer, buffer);
#if ENABLE(OPENTYPE_SANITIZER)
OpenTypeSanitizer sanitizer(buffer);
RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
if (!transcodeBuffer)
return 0; buffer = transcodeBuffer.get();
#endif
#if OS(WINDOWS)
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);
if (!typeface)
return 0;
return new FontCustomPlatformData(typeface);
#else
notImplemented();
return 0;
#endif
}
bool FontCustomPlatformData::supportsFormat(const String& format)
{
return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype")
#if ENABLE(OPENTYPE_SANITIZER)
|| equalIgnoringCase(format, "woff")
#endif
;
}
}