SkStreamAsset* DWriteFontTypeface::onOpenStream(int* ttcIndex) const {
*ttcIndex = fDWriteFontFace->GetIndex();
UINT32 numFiles;
HRNM(fDWriteFontFace->GetFiles(&numFiles, nullptr),
"Could not get number of font files.");
if (numFiles != 1) {
return nullptr;
}
SkTScopedComPtr<IDWriteFontFile> fontFile;
HRNM(fDWriteFontFace->GetFiles(&numFiles, &fontFile), "Could not get font files.");
const void* fontFileKey;
UINT32 fontFileKeySize;
HRNM(fontFile->GetReferenceKey(&fontFileKey, &fontFileKeySize),
"Could not get font file reference key.");
SkTScopedComPtr<IDWriteFontFileLoader> fontFileLoader;
HRNM(fontFile->GetLoader(&fontFileLoader), "Could not get font file loader.");
SkTScopedComPtr<IDWriteFontFileStream> fontFileStream;
HRNM(fontFileLoader->CreateStreamFromKey(fontFileKey, fontFileKeySize,
&fontFileStream),
"Could not create font file stream.");
return new SkDWriteFontFileStream(fontFileStream.get());
}
static bool FindByDWriteFont(SkTypeface* cached, void* ctx) {
DWriteFontTypeface* cshFace = reinterpret_cast<DWriteFontTypeface*>(cached);
ProtoDWriteTypeface* ctxFace = reinterpret_cast<ProtoDWriteTypeface*>(ctx);
bool same;
//Check to see if the two fonts are identical.
HRB(are_same(cshFace->fDWriteFont.get(), ctxFace->fDWriteFont, same));
if (same) {
return true;
}
HRB(are_same(cshFace->fDWriteFontFace.get(), ctxFace->fDWriteFontFace, same));
if (same) {
return true;
}
//Check if the two fonts share the same loader and have the same key.
UINT32 cshNumFiles;
UINT32 ctxNumFiles;
HRB(cshFace->fDWriteFontFace->GetFiles(&cshNumFiles, nullptr));
HRB(ctxFace->fDWriteFontFace->GetFiles(&ctxNumFiles, nullptr));
if (cshNumFiles != ctxNumFiles) {
return false;
}
SkTScopedComPtr<IDWriteFontFile> cshFontFile;
SkTScopedComPtr<IDWriteFontFile> ctxFontFile;
HRB(cshFace->fDWriteFontFace->GetFiles(&cshNumFiles, &cshFontFile));
HRB(ctxFace->fDWriteFontFace->GetFiles(&ctxNumFiles, &ctxFontFile));
//for (each file) { //we currently only admit fonts from one file.
SkTScopedComPtr<IDWriteFontFileLoader> cshFontFileLoader;
SkTScopedComPtr<IDWriteFontFileLoader> ctxFontFileLoader;
HRB(cshFontFile->GetLoader(&cshFontFileLoader));
HRB(ctxFontFile->GetLoader(&ctxFontFileLoader));
HRB(are_same(cshFontFileLoader.get(), ctxFontFileLoader.get(), same));
if (!same) {
return false;
}
//}
const void* cshRefKey;
UINT32 cshRefKeySize;
const void* ctxRefKey;
UINT32 ctxRefKeySize;
HRB(cshFontFile->GetReferenceKey(&cshRefKey, &cshRefKeySize));
HRB(ctxFontFile->GetReferenceKey(&ctxRefKey, &ctxRefKeySize));
if (cshRefKeySize != ctxRefKeySize) {
return false;
}
if (0 != memcmp(cshRefKey, ctxRefKey, ctxRefKeySize)) {
return false;
}
//TODO: better means than comparing name strings?
//NOTE: .ttc and fake bold/italic will end up here.
SkTScopedComPtr<IDWriteLocalizedStrings> cshFamilyNames;
SkTScopedComPtr<IDWriteLocalizedStrings> cshFaceNames;
HRB(cshFace->fDWriteFontFamily->GetFamilyNames(&cshFamilyNames));
HRB(cshFace->fDWriteFont->GetFaceNames(&cshFaceNames));
UINT32 cshFamilyNameLength;
UINT32 cshFaceNameLength;
HRB(cshFamilyNames->GetStringLength(0, &cshFamilyNameLength));
HRB(cshFaceNames->GetStringLength(0, &cshFaceNameLength));
SkTScopedComPtr<IDWriteLocalizedStrings> ctxFamilyNames;
SkTScopedComPtr<IDWriteLocalizedStrings> ctxFaceNames;
HRB(ctxFace->fDWriteFontFamily->GetFamilyNames(&ctxFamilyNames));
HRB(ctxFace->fDWriteFont->GetFaceNames(&ctxFaceNames));
UINT32 ctxFamilyNameLength;
UINT32 ctxFaceNameLength;
HRB(ctxFamilyNames->GetStringLength(0, &ctxFamilyNameLength));
HRB(ctxFaceNames->GetStringLength(0, &ctxFaceNameLength));
if (cshFamilyNameLength != ctxFamilyNameLength ||
cshFaceNameLength != ctxFaceNameLength)
{
return false;
}
SkSMallocWCHAR cshFamilyName(cshFamilyNameLength+1);
SkSMallocWCHAR cshFaceName(cshFaceNameLength+1);
HRB(cshFamilyNames->GetString(0, cshFamilyName.get(), cshFamilyNameLength+1));
HRB(cshFaceNames->GetString(0, cshFaceName.get(), cshFaceNameLength+1));
SkSMallocWCHAR ctxFamilyName(ctxFamilyNameLength+1);
SkSMallocWCHAR ctxFaceName(ctxFaceNameLength+1);
HRB(ctxFamilyNames->GetString(0, ctxFamilyName.get(), ctxFamilyNameLength+1));
HRB(ctxFaceNames->GetString(0, ctxFaceName.get(), ctxFaceNameLength+1));
return wcscmp(cshFamilyName.get(), ctxFamilyName.get()) == 0 &&
wcscmp(cshFaceName.get(), ctxFaceName.get()) == 0;
}
