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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_SERVICE_GRAPHITE_SHARED_CONTEXT_H_
#define GPU_COMMAND_BUFFER_SERVICE_GRAPHITE_SHARED_CONTEXT_H_
#include <atomic>
#include "base/functional/callback.h"
#include "base/synchronization/lock.h"
#include "gpu/gpu_gles2_export.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkSurface.h"
#include "third_party/skia/include/gpu/graphite/GraphiteTypes.h"
#include "third_party/skia/include/gpu/graphite/Recorder.h"
class SkTraceMemoryDump;
namespace skgpu ::graphite {
class BackendTexture;
struct InsertRecordingInfo;
class PrecompileContext;
class Recorder;
struct RecorderOptions;
} // namespace skgpu::graphite
namespace gpu {
class GpuProcessShmCount;
// This is a thread safe wrapper class to skgpu::graphite::Context. In order to
// support multi-threading, locks are used to ensure thread safety in
// skgpu::graphite::Context. All clients need to call the wrapper functions in
// GraphiteSharedContext. Only GraphiteSharedContext can communicate with
// skgpu::graphite::Context directly. If |is_thread_safe| is false, the locks
// are equivalent to no-op.
class GPU_GLES2_EXPORT GraphiteSharedContext {
public:
using SkImageReadPixelsCallback = base::OnceCallback<
void(void* ctx, std::unique_ptr<const SkSurface::AsyncReadResult>)>;
using FlushCallback = base::RepeatingCallback<void()>;
GraphiteSharedContext(
std::unique_ptr<skgpu::graphite::Context> graphite_context,
GpuProcessShmCount* use_shader_cache_shm_count,
bool is_thread_safe,
FlushCallback backend_flush_callback = FlushCallback());
GraphiteSharedContext(const GraphiteSharedContext&) = delete;
GraphiteSharedContext(GraphiteSharedContext&&) = delete;
GraphiteSharedContext& operator=(const GraphiteSharedContext&) = delete;
GraphiteSharedContext& operator=(GraphiteSharedContext&&) = delete;
~GraphiteSharedContext();
bool IsThreadSafe() const { return !!lock_; }
// Wrapper function implementations for skgpu::graphite:Context
skgpu::BackendApi backend() const;
std::unique_ptr<skgpu::graphite::Recorder> makeRecorder(
const skgpu::graphite::RecorderOptions& = {});
std::unique_ptr<skgpu::graphite::PrecompileContext> makePrecompileContext();
bool insertRecording(const skgpu::graphite::InsertRecordingInfo& info);
void submit(skgpu::graphite::SyncToCpu = skgpu::graphite::SyncToCpu::kNo);
// The difference between this and submit() is that it will trigger the
// provided backend_flush_callback in addition to calling submit(). This is
// needed because on some backend such as D3D11 we could enable a delayed
// flush toggle. In that case, submit() won't send the commands to the GPU
// immediately and require an explicit flush.
void submitAndFlushBackend(
skgpu::graphite::SyncToCpu = skgpu::graphite::SyncToCpu::kNo);
bool hasUnfinishedGpuWork() const;
void asyncRescaleAndReadPixels(const SkImage* src,
const SkImageInfo& dstImageInfo,
const SkIRect& srcRect,
SkImage::RescaleGamma rescaleGamma,
SkImage::RescaleMode rescaleMode,
SkImageReadPixelsCallback callback,
SkImage::ReadPixelsContext context);
void asyncRescaleAndReadPixels(const SkSurface* src,
const SkImageInfo& dstImageInfo,
const SkIRect& srcRect,
SkImage::RescaleGamma rescaleGamma,
SkImage::RescaleMode rescaleMode,
SkImageReadPixelsCallback callback,
SkImage::ReadPixelsContext context);
bool asyncRescaleAndReadPixelsAndSubmit(const SkImage* src,
const SkImageInfo& dstImageInfo,
const SkIRect& srcRect,
SkImage::RescaleGamma rescaleGamma,
SkImage::RescaleMode rescaleMode,
SkImageReadPixelsCallback callback,
SkImage::ReadPixelsContext context);
bool asyncRescaleAndReadPixelsAndSubmit(const SkSurface* src,
const SkImageInfo& dstImageInfo,
const SkIRect& srcRect,
SkImage::RescaleGamma rescaleGamma,
SkImage::RescaleMode rescaleMode,
SkImageReadPixelsCallback callback,
SkImage::ReadPixelsContext context);
void asyncRescaleAndReadPixelsYUV420(const SkImage* src,
SkYUVColorSpace yuvColorSpace,
sk_sp<SkColorSpace> dstColorSpace,
const SkIRect& srcRect,
const SkISize& dstSize,
SkImage::RescaleGamma rescaleGamma,
SkImage::RescaleMode rescaleMode,
SkImageReadPixelsCallback callback,
SkImage::ReadPixelsContext context);
void asyncRescaleAndReadPixelsYUV420(const SkSurface* src,
SkYUVColorSpace yuvColorSpace,
sk_sp<SkColorSpace> dstColorSpace,
const SkIRect& srcRect,
const SkISize& dstSize,
SkImage::RescaleGamma rescaleGamma,
SkImage::RescaleMode rescaleMode,
SkImageReadPixelsCallback callback,
SkImage::ReadPixelsContext context);
void asyncRescaleAndReadPixelsYUVA420(const SkImage* src,
SkYUVColorSpace yuvColorSpace,
sk_sp<SkColorSpace> dstColorSpace,
const SkIRect& srcRect,
const SkISize& dstSize,
SkImage::RescaleGamma rescaleGamma,
SkImage::RescaleMode rescaleMode,
SkImageReadPixelsCallback callback,
SkImage::ReadPixelsContext context);
void asyncRescaleAndReadPixelsYUVA420(const SkSurface* src,
SkYUVColorSpace yuvColorSpace,
sk_sp<SkColorSpace> dstColorSpace,
const SkIRect& srcRect,
const SkISize& dstSize,
SkImage::RescaleGamma rescaleGamma,
SkImage::RescaleMode rescaleMode,
SkImageReadPixelsCallback callback,
SkImage::ReadPixelsContext context);
void checkAsyncWorkCompletion();
void deleteBackendTexture(const skgpu::graphite::BackendTexture&);
void freeGpuResources();
void performDeferredCleanup(std::chrono::milliseconds msNotUsed);
// TODO(crbug.com/407874799): Some of the methods below (maybe above as well)
// may be safe to use without locks. Review and delete unneeded locks in
// those methods once we start to run with |is_thread_safe| set to true.
size_t currentBudgetedBytes() const;
size_t currentPurgeableBytes() const;
size_t maxBudgetedBytes() const;
void setMaxBudgetedBytes(size_t bytes);
void dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) const;
bool isDeviceLost() const;
int maxTextureSize() const;
bool supportsProtectedContent() const;
skgpu::GpuStatsFlags supportedGpuStats() const;
private:
class AutoLock;
bool InsertRecordingImpl(const skgpu::graphite::InsertRecordingInfo&);
bool SubmitImpl(skgpu::graphite::SyncToCpu);
void SubmitAndFlushBackendImpl(skgpu::graphite::SyncToCpu);
// The lock for protecting skgpu::graphite::Context.
// Valid only when |is_thread_safe| is set to true in Ctor.
mutable std::optional<base::Lock> lock_;
// This is the id of the thread where |lock_| is acquired, used for detecting
// recursive lock. |locked_thread_id_| is set to kInvalidThreadId when
// is_thread_safe is not enabled or when |lock_| is released.
mutable std::atomic<base::PlatformThreadId> locked_thread_id_{
base::kInvalidThreadId};
const std::unique_ptr<skgpu::graphite::Context> graphite_context_;
raw_ptr<GpuProcessShmCount> use_shader_cache_shm_count_ = nullptr;
size_t num_pending_recordings_ = 0;
FlushCallback backend_flush_callback_;
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_GRAPHITE_SHARED_CONTEXT_H_
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