| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkFontConfigInterface.h" |
| #include "SkFontDescriptor.h" |
| #include "SkFontHost.h" |
| #include "SkFontHost_FreeType_common.h" |
| #include "SkFontStream.h" |
| #include "SkStream.h" |
| #include "SkTypeface.h" |
| #include "SkTypefaceCache.h" |
| |
| SK_DECLARE_STATIC_MUTEX(gFontConfigInterfaceMutex); |
| static SkFontConfigInterface* gFontConfigInterface; |
| |
| SkFontConfigInterface* SkFontConfigInterface::RefGlobal() { |
| SkAutoMutexAcquire ac(gFontConfigInterfaceMutex); |
| |
| return SkSafeRef(gFontConfigInterface); |
| } |
| |
| SkFontConfigInterface* SkFontConfigInterface::SetGlobal(SkFontConfigInterface* fc) { |
| SkAutoMutexAcquire ac(gFontConfigInterfaceMutex); |
| |
| SkRefCnt_SafeAssign(gFontConfigInterface, fc); |
| return fc; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // convenience function to create the direct interface if none is installed. |
| extern SkFontConfigInterface* SkCreateDirectFontConfigInterface(); |
| |
| static SkFontConfigInterface* RefFCI() { |
| for (;;) { |
| SkFontConfigInterface* fci = SkFontConfigInterface::RefGlobal(); |
| if (fci) { |
| return fci; |
| } |
| fci = SkFontConfigInterface::GetSingletonDirectInterface(); |
| SkFontConfigInterface::SetGlobal(fci)->unref(); |
| } |
| } |
| |
| class FontConfigTypeface : public SkTypeface_FreeType { |
| SkFontConfigInterface::FontIdentity fIdentity; |
| SkString fFamilyName; |
| SkStream* fLocalStream; |
| |
| public: |
| FontConfigTypeface(Style style, |
| const SkFontConfigInterface::FontIdentity& fi, |
| const SkString& familyName) |
| : INHERITED(style, SkTypefaceCache::NewFontID(), false) |
| , fIdentity(fi) |
| , fFamilyName(familyName) |
| , fLocalStream(NULL) {} |
| |
| FontConfigTypeface(Style style, SkStream* localStream) |
| : INHERITED(style, SkTypefaceCache::NewFontID(), false) { |
| // we default to empty fFamilyName and fIdentity |
| fLocalStream = localStream; |
| SkSafeRef(localStream); |
| } |
| |
| virtual ~FontConfigTypeface() { |
| SkSafeUnref(fLocalStream); |
| } |
| |
| const SkFontConfigInterface::FontIdentity& getIdentity() const { |
| return fIdentity; |
| } |
| |
| const char* getFamilyName() const { return fFamilyName.c_str(); } |
| SkStream* getLocalStream() const { return fLocalStream; } |
| |
| bool isFamilyName(const char* name) const { |
| return fFamilyName.equals(name); |
| } |
| |
| protected: |
| friend class SkFontHost; // hack until we can make public versions |
| |
| virtual int onGetTableTags(SkFontTableTag tags[]) const SK_OVERRIDE; |
| virtual size_t onGetTableData(SkFontTableTag, size_t offset, |
| size_t length, void* data) const SK_OVERRIDE; |
| virtual void onGetFontDescriptor(SkFontDescriptor*, bool*) const SK_OVERRIDE; |
| virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE; |
| |
| private: |
| typedef SkTypeface_FreeType INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| struct FindRec { |
| FindRec(const char* name, SkTypeface::Style style) |
| : fFamilyName(name) // don't need to make a deep copy |
| , fStyle(style) {} |
| |
| const char* fFamilyName; |
| SkTypeface::Style fStyle; |
| }; |
| |
| static bool find_proc(SkTypeface* face, SkTypeface::Style style, void* ctx) { |
| FontConfigTypeface* fci = (FontConfigTypeface*)face; |
| const FindRec* rec = (const FindRec*)ctx; |
| |
| return rec->fStyle == style && fci->isFamilyName(rec->fFamilyName); |
| } |
| |
| SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace, |
| const char familyName[], |
| SkTypeface::Style style) { |
| SkAutoTUnref<SkFontConfigInterface> fci(RefFCI()); |
| if (NULL == fci.get()) { |
| return NULL; |
| } |
| |
| if (familyFace) { |
| FontConfigTypeface* fct = (FontConfigTypeface*)familyFace; |
| familyName = fct->getFamilyName(); |
| } |
| |
| FindRec rec(familyName, style); |
| SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_proc, &rec); |
| if (face) { |
| // SkDebugf("found cached face <%s> <%s> %p [%d]\n", familyName, ((FontConfigTypeface*)face)->getFamilyName(), face, face->getRefCnt()); |
| return face; |
| } |
| |
| SkFontConfigInterface::FontIdentity indentity; |
| SkString outFamilyName; |
| SkTypeface::Style outStyle; |
| |
| if (!fci->matchFamilyName(familyName, style, |
| &indentity, &outFamilyName, &outStyle)) { |
| return NULL; |
| } |
| |
| face = SkNEW_ARGS(FontConfigTypeface, (outStyle, indentity, outFamilyName)); |
| SkTypefaceCache::Add(face, style); |
| // SkDebugf("add face <%s> <%s> %p [%d]\n", familyName, outFamilyName.c_str(), face, face->getRefCnt()); |
| return face; |
| } |
| |
| SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) { |
| if (!stream) { |
| return NULL; |
| } |
| const size_t length = stream->getLength(); |
| if (!length) { |
| return NULL; |
| } |
| if (length >= 1024 * 1024 * 1024) { |
| return NULL; // don't accept too large fonts (>= 1GB) for safety. |
| } |
| |
| // TODO should the caller give us the style? |
| SkTypeface::Style style = SkTypeface::kNormal; |
| SkTypeface* face = SkNEW_ARGS(FontConfigTypeface, (style, stream)); |
| SkTypefaceCache::Add(face, style); |
| return face; |
| } |
| |
| SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) { |
| SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path)); |
| return stream.get() ? CreateTypefaceFromStream(stream) : NULL; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // DEPRECATED |
| SkTypeface* SkFontHost::NextLogicalTypeface(SkFontID curr, SkFontID orig) { |
| // We don't handle font fallback. |
| return NULL; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkStream* FontConfigTypeface::onOpenStream(int* ttcIndex) const { |
| SkStream* stream = this->getLocalStream(); |
| if (stream) { |
| // TODO: fix issue 1176. |
| // As of now open_stream will return a stream and unwind it, but the |
| // SkStream is not thread safe, and if two threads use the stream they |
| // may collide and print preview for example could still fail, |
| // or there could be some failures in rendering if this stream is used |
| // there. |
| stream->rewind(); |
| stream->ref(); |
| // should have been provided by CreateFromStream() |
| *ttcIndex = 0; |
| } else { |
| SkAutoTUnref<SkFontConfigInterface> fci(RefFCI()); |
| if (NULL == fci.get()) { |
| return NULL; |
| } |
| stream = fci->openStream(this->getIdentity()); |
| *ttcIndex = this->getIdentity().fTTCIndex; |
| } |
| return stream; |
| } |
| |
| int FontConfigTypeface::onGetTableTags(SkFontTableTag tags[]) const { |
| int ttcIndex; |
| SkAutoTUnref<SkStream> stream(this->openStream(&ttcIndex)); |
| return stream.get() |
| ? SkFontStream::GetTableTags(stream, ttcIndex, tags) |
| : 0; |
| } |
| |
| size_t FontConfigTypeface::onGetTableData(SkFontTableTag tag, size_t offset, |
| size_t length, void* data) const { |
| int ttcIndex; |
| SkAutoTUnref<SkStream> stream(this->openStream(&ttcIndex)); |
| return stream.get() |
| ? SkFontStream::GetTableData(stream, ttcIndex, |
| tag, offset, length, data) |
| : 0; |
| } |
| |
| void FontConfigTypeface::onGetFontDescriptor(SkFontDescriptor* desc, |
| bool* isLocalStream) const { |
| desc->setFamilyName(this->getFamilyName()); |
| *isLocalStream = SkToBool(this->getLocalStream()); |
| } |