FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
{
ASSERT_ARG(buffer, buffer);
ASSERT(T2embedLibrary());
RefPtr<SharedBuffer> sfntBuffer;
if (isWOFF(buffer)) {
Vector<char> sfnt;
if (!convertWOFFToSfnt(buffer, sfnt))
return 0;
sfntBuffer = SharedBuffer::adoptVector(sfnt);
buffer = sfntBuffer.get();
}
// Introduce the font to GDI. AddFontMemResourceEx cannot be used, 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). TTLoadEmbeddedFont lets us override the font family name, so using a unique name
// we avoid namespace collisions.
String fontName = createUniqueFontName();
// TTLoadEmbeddedFont works only with Embedded OpenType (.eot) data, so we need to create an EOT header
// and prepend it to the font data.
EOTHeader eotHeader;
size_t overlayDst;
size_t overlaySrc;
size_t overlayLength;
if (!getEOTHeader(buffer, eotHeader, overlayDst, overlaySrc, overlayLength))
return 0;
HANDLE fontReference;
ULONG privStatus;
ULONG status;
EOTStream eotStream(eotHeader, buffer, overlayDst, overlaySrc, overlayLength);
LONG loadEmbeddedFontResult = TTLoadEmbeddedFont(&fontReference, TTLOAD_PRIVATE, &privStatus, LICENSE_PREVIEWPRINT, &status, readEmbedProc, &eotStream, const_cast<LPWSTR>(fontName.charactersWithNullTermination()), 0, 0);
if (loadEmbeddedFontResult == E_NONE)
fontName = String();
else {
fontReference = renameAndActivateFont(buffer, fontName);
if (!fontReference)
return 0;
}
return new FontCustomPlatformData(fontReference, fontName);
}
FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
{
ASSERT_ARG(buffer, buffer);
ASSERT(T2embedLibrary());
// Get CG to create the font.
CGDataProviderDirectAccessCallbacks callbacks = { &getData, &releaseData, &getBytesWithOffset, NULL };
RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateDirectAccess(buffer, buffer->size(), &callbacks));
CGFontRef cgFont = CGFontCreateWithDataProvider(dataProvider.get());
if (!cgFont)
return 0;
// Introduce the font to GDI. AddFontMemResourceEx cannot be used, 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). TTLoadEmbeddedFont lets us override the font family name, so using a unique name
// we avoid namespace collisions.
String fontName = createUniqueFontName();
// TTLoadEmbeddedFont works only with Embedded OpenType (.eot) data, so we need to create an EOT header
// and prepend it to the font data.
Vector<UInt8, 512> eotHeader;
if (!getEOTHeader(buffer, eotHeader)) {
CGFontRelease(cgFont);
return 0;
}
HANDLE fontReference;
ULONG privStatus;
ULONG status;
EOTStream eotStream(eotHeader, buffer);
LONG loadEmbeddedFontResult = TTLoadEmbeddedFont(&fontReference, TTLOAD_PRIVATE, &privStatus, LICENSE_PREVIEWPRINT, &status, readEmbedProc, &eotStream, const_cast<LPWSTR>(fontName.charactersWithNullTermination()), 0, 0);
if (loadEmbeddedFontResult != E_NONE) {
CGFontRelease(cgFont);
return 0;
}
return new FontCustomPlatformData(cgFont, fontReference);
}
