DawnBuffer.h

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/*
 * Copyright 2022 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef skgpu_graphite_DawnBuffer_DEFINED
#define skgpu_graphite_DawnBuffer_DEFINED
 
#include "webgpu/webgpu_cpp.h"  // NO_G3_REWRITE
 
#include "include/core/SkRefCnt.h"
#include "include/gpu/graphite/dawn/DawnTypes.h"
#include "include/private/base/SkTArray.h"
#include "src/gpu/RefCntedCallback.h"
#include "src/gpu/graphite/Buffer.h"
#include "src/gpu/graphite/dawn/DawnAsyncWait.h"
#include "src/gpu/graphite/dawn/DawnSharedContext.h"
 
namespace skgpu::graphite {
 
class DawnBuffer : public Buffer {
public:
    static sk_sp<DawnBuffer> Make(const DawnSharedContext*,
                                  size_t size,
                                  BufferType type,
                                  AccessPattern,
                                  std::string_view label);
 
    bool isUnmappable() const override;
 
    const wgpu::Buffer& dawnBuffer() const { return fBuffer; }
 
private:
    DawnBuffer(const DawnSharedContext*,
               size_t size,
               wgpu::Buffer,
               BufferType,
               void* mapAtCreationPtr,
               std::string_view label);
 
#if defined(__EMSCRIPTEN__)
    void prepareForReturnToCache(const std::function<void()>& takeRef) override;
    void onAsyncMap(GpuFinishedProc, GpuFinishedContext) override;
#endif
    void onMap() override;
    void onUnmap() override;
 
    void mapCallback(WGPUBufferMapAsyncStatus status);
 
    void freeGpuData() override;
 
    void onDumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump,
                                const char* dumpName) const override;
 
    const DawnSharedContext* dawnSharedContext() const {
        return static_cast<const DawnSharedContext*>(this->sharedContext());
    }
 
    wgpu::Buffer fBuffer;
    const BufferType fType;
    SkMutex fAsyncMutex;
    skia_private::TArray<sk_sp<RefCntedCallback>> fAsyncMapCallbacks SK_GUARDED_BY(fAsyncMutex);
};
 
} // namespace skgpu::graphite
 
#endif // skgpu_graphite_DawnBuffer_DEFINED