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// Copyright 2020 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_SHARED_IMAGE_ANDROID_IMAGE_BACKING_H_
#define GPU_COMMAND_BUFFER_SERVICE_SHARED_IMAGE_ANDROID_IMAGE_BACKING_H_
#include "base/containers/flat_set.h"
#include "base/files/scoped_file.h"
#include "base/memory/raw_ptr.h"
#include "gpu/command_buffer/common/shared_image_usage.h"
#include "gpu/command_buffer/service/shared_image/shared_image_backing.h"
namespace gpu {
class AndroidImageBacking : public ClearTrackingSharedImageBacking {
public:
AndroidImageBacking(const Mailbox& mailbox,
viz::SharedImageFormat format,
const gfx::Size& size,
const gfx::ColorSpace& color_space,
GrSurfaceOrigin surface_origin,
SkAlphaType alpha_type,
gpu::SharedImageUsageSet usage,
std::string debug_label,
size_t estimated_size,
bool is_thread_safe,
base::ScopedFD initial_upload_fd);
~AndroidImageBacking() override;
AndroidImageBacking(const AndroidImageBacking&) = delete;
AndroidImageBacking& operator=(const AndroidImageBacking&) = delete;
virtual bool BeginWrite(base::ScopedFD* fd_to_wait_on);
virtual void EndWrite(base::ScopedFD end_write_fd);
virtual bool BeginRead(const SharedImageRepresentation* reader,
base::ScopedFD* fd_to_wait_on);
virtual void EndRead(const SharedImageRepresentation* reader,
base::ScopedFD end_read_fd);
base::ScopedFD TakeReadFence();
protected:
bool allow_concurrent_read_write() const {
return usage().Has(SHARED_IMAGE_USAGE_CONCURRENT_READ_WRITE);
}
// All reads and writes must wait for exiting writes to complete.
base::ScopedFD write_sync_fd_ GUARDED_BY(lock_);
bool is_writing_ GUARDED_BY(lock_) = false;
// All writes must wait for existing reads to complete.
base::ScopedFD read_sync_fd_ GUARDED_BY(lock_);
base::flat_set<raw_ptr<const SharedImageRepresentation, CtnExperimental>>
active_readers_ GUARDED_BY(lock_);
bool is_overlay_accessing_ GUARDED_BY(lock_) = false;
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_SHARED_IMAGE_ANDROID_IMAGE_BACKING_H_
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