| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkDWriteFontFileStream_DEFINED |
| #define SkDWriteFontFileStream_DEFINED |
| |
| #include "include/core/SkTypes.h" |
| |
| #include "include/core/SkStream.h" |
| #include "include/private/base/SkMutex.h" |
| #include "src/utils/win/SkObjBase.h" |
| #include "src/utils/win/SkTScopedComPtr.h" |
| |
| #include <dwrite.h> |
| |
| /** |
| * An SkStream backed by an IDWriteFontFileStream. |
| * This allows Skia code to read an IDWriteFontFileStream. |
| */ |
| class SkDWriteFontFileStream : public SkStreamMemory { |
| public: |
| explicit SkDWriteFontFileStream(IDWriteFontFileStream* fontFileStream); |
| ~SkDWriteFontFileStream() override; |
| |
| size_t read(void* buffer, size_t size) override; |
| bool isAtEnd() const override; |
| bool rewind() override; |
| size_t getPosition() const override; |
| bool seek(size_t position) override; |
| bool move(long offset) override; |
| size_t getLength() const override; |
| const void* getMemoryBase() override; |
| |
| std::unique_ptr<SkDWriteFontFileStream> duplicate() const { |
| return std::unique_ptr<SkDWriteFontFileStream>(this->onDuplicate()); |
| } |
| std::unique_ptr<SkDWriteFontFileStream> fork() const { |
| return std::unique_ptr<SkDWriteFontFileStream>(this->onFork()); |
| } |
| |
| private: |
| SkDWriteFontFileStream* onDuplicate() const override; |
| SkDWriteFontFileStream* onFork() const override; |
| |
| SkTScopedComPtr<IDWriteFontFileStream> fFontFileStream; |
| size_t fPos; |
| const void* fLockedMemory; |
| void* fFragmentLock; |
| }; |
| |
| /** |
| * An IDWriteFontFileStream backed by an SkStream. |
| * This allows DirectWrite to read an SkStream. |
| */ |
| class SkDWriteFontFileStreamWrapper : public IDWriteFontFileStream { |
| public: |
| // IUnknown methods |
| SK_STDMETHODIMP QueryInterface(REFIID iid, void** ppvObject) override; |
| SK_STDMETHODIMP_(ULONG) AddRef() override; |
| SK_STDMETHODIMP_(ULONG) Release() override; |
| |
| // IDWriteFontFileStream methods |
| SK_STDMETHODIMP ReadFileFragment( |
| void const** fragmentStart, |
| UINT64 fileOffset, |
| UINT64 fragmentSize, |
| void** fragmentContext) override; |
| |
| SK_STDMETHODIMP_(void) ReleaseFileFragment(void* fragmentContext) override; |
| SK_STDMETHODIMP GetFileSize(UINT64* fileSize) override; |
| SK_STDMETHODIMP GetLastWriteTime(UINT64* lastWriteTime) override; |
| |
| static HRESULT Create(SkStreamAsset* stream, |
| SkDWriteFontFileStreamWrapper** streamFontFileStream); |
| |
| private: |
| explicit SkDWriteFontFileStreamWrapper(SkStreamAsset* stream); |
| virtual ~SkDWriteFontFileStreamWrapper() { } |
| |
| ULONG fRefCount; |
| std::unique_ptr<SkStreamAsset> fStream; |
| SkMutex fStreamMutex; |
| }; |
| #endif |