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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_SHARED_IMAGE_INTERFACE_IN_PROCESS_BASE_H_
#define GPU_COMMAND_BUFFER_SERVICE_SHARED_IMAGE_INTERFACE_IN_PROCESS_BASE_H_
#include "base/sequence_checker.h"
#include "base/synchronization/waitable_event.h"
#include "gpu/command_buffer/client/client_shared_image.h"
#include "gpu/command_buffer/client/shared_image_interface.h"
#include "gpu/command_buffer/common/command_buffer_id.h"
#include "gpu/command_buffer/common/constants.h"
#include "gpu/command_buffer/common/shared_image_capabilities.h"
#include "gpu/gpu_gles2_export.h"
namespace gpu {
class SharedImageFactory;
// Common base implementation for in-process `SharedImageInterface`
// Note: `SharedImageInterface` requires //gpu OWNERS approval for new
// implementations by use of a private constructor; this subclass does not
// enforce the same visibility restrictions on its own subclasses, but does
// mark all non-trivial overrides `final` to ensure subclasses restrict
// themselves to expected extension points; `override`-qualified methods here
// are generally implemented as `NOTREACHED()`.
class GPU_GLES2_EXPORT SharedImageInterfaceInProcessBase
: public SharedImageInterface {
public:
// Generate the next sequence token in the process's sequence
SyncToken GenNextSyncToken();
// Include default-args overloads from superclass.
using SharedImageInterface::CreateSharedImage;
// SharedImageInterface:
scoped_refptr<ClientSharedImage> CreateSharedImage(
const SharedImageInfo& si_info,
gpu::SurfaceHandle surface_handle,
std::optional<SharedImagePoolId> pool_id) final;
scoped_refptr<ClientSharedImage> CreateSharedImage(
const SharedImageInfo& si_info,
base::span<const uint8_t> pixel_data) final;
scoped_refptr<ClientSharedImage> CreateSharedImage(
const SharedImageInfo& si_info,
SurfaceHandle surface_handle,
gfx::BufferUsage buffer_usage,
std::optional<SharedImagePoolId> pool_id) override;
scoped_refptr<ClientSharedImage> CreateSharedImage(
const SharedImageInfo& si_info,
gpu::SurfaceHandle surface_handle,
gfx::BufferUsage buffer_usage,
gfx::GpuMemoryBufferHandle buffer_handle) final;
scoped_refptr<ClientSharedImage> CreateSharedImage(
const SharedImageInfo& si_info,
gfx::GpuMemoryBufferHandle buffer_handle) final;
scoped_refptr<ClientSharedImage> CreateSharedImageForMLTensor(
std::string debug_label,
viz::SharedImageFormat format,
const gfx::Size& size,
gpu::SharedImageUsageSet usage) override;
scoped_refptr<ClientSharedImage> CreateSharedImageForSoftwareCompositor(
const SharedImageInfo& si_info) final;
void UpdateSharedImage(const SyncToken& sync_token,
const Mailbox& mailbox) final;
void UpdateSharedImage(const SyncToken& sync_token,
std::unique_ptr<gfx::GpuFence> acquire_fence,
const Mailbox& mailbox) final;
void DestroySharedImage(const SyncToken& sync_token,
const Mailbox& mailbox) final;
void DestroySharedImage(
const SyncToken& sync_token,
scoped_refptr<ClientSharedImage> client_shared_image) final;
scoped_refptr<ClientSharedImage> ImportSharedImage(
ExportedSharedImage exported_shared_image) override;
#if BUILDFLAG(IS_FUCHSIA)
void RegisterSysmemBufferCollection(zx::eventpair service_handle,
zx::channel sysmem_token,
const viz::SharedImageFormat& format,
gfx::BufferUsage usage,
bool register_with_image_pipe) override;
#endif // BUILDFLAG(IS_FUCHSIA)
SyncToken GenUnverifiedSyncToken() final;
SyncToken GenVerifiedSyncToken() final;
void VerifySyncToken(SyncToken& sync_token) final;
bool CanVerifySyncToken(const gpu::SyncToken& sync_token) final;
void VerifyFlush() final;
void WaitSyncToken(const SyncToken& sync_token) final;
const SharedImageCapabilities& GetCapabilities() final;
protected:
// `MakeSyncToken()` creates a sync token with `namespace_id` and
// `command_buffer_id`; `GenCreationSyncToken()` verifies that sync token
// or not based on `verify_creation_sync_token`. If
// `shared_image_capabilities` is not provided to the constructor it will be
// lazily-created on the GPU thread.
SharedImageInterfaceInProcessBase(
CommandBufferNamespace namespace_id,
CommandBufferId command_buffer_id,
bool verify_creation_sync_token,
SharedImageCapabilities shared_image_capabilities);
SharedImageInterfaceInProcessBase(CommandBufferNamespace namespace_id,
CommandBufferId command_buffer_id,
bool verify_creation_sync_token);
~SharedImageInterfaceInProcessBase() override;
// Schedule the `task` on the GPU, waiting on `sync_token_fences` and
// signalling `release` when done.
// The GPU expects monotonically increasing release IDs of the `release` sync
// token, generally accomplished in this class by initializing `release` from
// `GenNextSyncTokenLocked()` and calling `ScheduleGpuTask()` in the same
// `lock_`-guarded critical section. Given the critical-section call,
// subclass implementations of `ScheduleGpuTask()` should perform a small and
// bounded amount of work.
virtual void ScheduleGpuTask(base::OnceClosure task,
std::vector<SyncToken> sync_token_fences,
const SyncToken& release) = 0;
// Get a reference to a valid `SharedImageFactory`, null if not available.
// This should only be called on the GPU thread.
virtual SharedImageFactory* GetSharedImageFactoryOnGpuThread() = 0;
// Returns `false` if cannot make context current.
// This should only be called on the GPU thread.
virtual bool MakeContextCurrentOnGpuThread(bool needs_gl /* = false*/) = 0;
bool MakeContextCurrentOnGpuThread() {
return MakeContextCurrentOnGpuThread(false);
}
// Mark context lost if shared image cannot be created.
// This should only be called on the GPU thread.
virtual void MarkContextLostOnGpuThread() = 0;
CommandBufferId command_buffer_id() const { return command_buffer_id_; }
// Sequence checker for tasks that run on the gpu thread.
SEQUENCE_CHECKER(gpu_sequence_checker_);
private:
void CreateSharedImageOnGpuThread(const Mailbox& mailbox,
SharedImageInfo si_info,
gpu::SurfaceHandle surface_handle);
void CreateSharedImageWithDataOnGpuThread(const Mailbox& mailbox,
SharedImageInfo si_info,
std::vector<uint8_t> pixel_data);
void CreateSharedImageWithBufferUsageOnGpuThread(
const Mailbox& mailbox,
SharedImageInfo si_info,
SurfaceHandle surface_handle,
gfx::BufferUsage buffer_usage);
void GetGpuMemoryBufferHandleInfoOnGpuThread(
const Mailbox& mailbox,
gfx::GpuMemoryBufferHandle* handle,
gfx::BufferUsage* buffer_usage,
base::WaitableEvent* completion);
void CreateSharedImageWithBufferOnGpuThread(
const Mailbox& mailbox,
SharedImageInfo si_info,
gfx::GpuMemoryBufferHandle buffer_handle);
// Blocks and waits for a response from the GPU main thread
GpuMemoryBufferHandleInfo GetGpuMemoryBufferHandleInfo(
const Mailbox& mailbox);
void UpdateSharedImageOnGpuThread(const Mailbox& mailbox);
void DestroySharedImageOnGpuThread(const Mailbox& mailbox);
void GetCapabilitiesOnGpuThread();
SyncToken MakeSyncToken(uint64_t release_id) {
return {namespace_id_, command_buffer_id_, release_id};
}
// Internal version of `GenNextSyncToken()` for when `lock_` is already held
SyncToken GenNextSyncTokenLocked() EXCLUSIVE_LOCKS_REQUIRED(lock_);
// Generate a sync token for `CreateSharedImage()`, with verification
// dependent on `verify_creation_sync_token_`
SyncToken GenCreationSyncToken() {
return verify_creation_sync_token_ ? GenVerifiedSyncToken()
: GenUnverifiedSyncToken();
}
// Accessed on any thread.
base::Lock lock_;
uint64_t next_fence_sync_release_ GUARDED_BY(lock_) = 1;
const CommandBufferNamespace namespace_id_;
const CommandBufferId command_buffer_id_;
const bool verify_creation_sync_token_;
// This should only be non-default initialized at construction or from the GPU
// thread. `shared_image_capabilities_ready_.IsSignalled()` indicates that it
// is safe to read from.
SharedImageCapabilities shared_image_capabilities_;
base::WaitableEvent shared_image_capabilities_ready_;
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_SERVICE_SHARED_IMAGE_INTERFACE_IN_PROCESS_BASE_H_
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