blob: 71ef04c16562f70d18595a7f166dd377ab9f7b25 [file] [log] [blame]
/*
* 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