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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/ipc/service/gpu_memory_buffer_factory.h"
#include <memory>
#include "base/task/single_thread_task_runner.h"
#include "build/build_config.h"
#include "gpu/ipc/common/gpu_client_ids.h"
#if BUILDFLAG(IS_APPLE)
#include "gpu/ipc/service/gpu_memory_buffer_factory_io_surface.h"
#endif
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_FUCHSIA)
#include "gpu/ipc/service/gpu_memory_buffer_factory_native_pixmap.h"
#endif
#if BUILDFLAG(IS_WIN)
#include "gpu/ipc/service/gpu_memory_buffer_factory_dxgi.h"
#endif
namespace gpu {
#if BUILDFLAG(IS_ANDROID)
namespace {
class GpuMemoryBufferFactoryStub : public GpuMemoryBufferFactory {
public:
GpuMemoryBufferFactoryStub() = default;
GpuMemoryBufferFactoryStub(const GpuMemoryBufferFactoryStub&) = delete;
GpuMemoryBufferFactoryStub& operator=(const GpuMemoryBufferFactoryStub&) =
delete;
~GpuMemoryBufferFactoryStub() override = default;
// GpuMemoryBufferFactory:
gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(
gfx::GpuMemoryBufferId id,
const gfx::Size& size,
const gfx::Size& framebuffer_size,
gfx::BufferFormat format,
gfx::BufferUsage usage,
int client_id,
SurfaceHandle surface_handle) override {
return gfx::GpuMemoryBufferHandle();
}
void DestroyGpuMemoryBuffer(gfx::GpuMemoryBufferId id,
int client_id) override {}
bool FillSharedMemoryRegionWithBufferContents(
gfx::GpuMemoryBufferHandle buffer_handle,
base::UnsafeSharedMemoryRegion shared_memory) override {
return false;
}
};
} // namespace
#endif
// static
std::unique_ptr<GpuMemoryBufferFactory>
GpuMemoryBufferFactory::CreateNativeType(
viz::VulkanContextProvider* vulkan_context_provider,
scoped_refptr<base::SingleThreadTaskRunner> io_runner) {
#if BUILDFLAG(IS_APPLE)
return std::make_unique<GpuMemoryBufferFactoryIOSurface>();
#elif BUILDFLAG(IS_ANDROID)
// Android does not support creating native GMBs (i.e., from
// AHardwareBuffers), but the codebase is structured such that it is necessary
// to have a factory that vends invalid GMB handles rather than having no
// factory at all.
return std::make_unique<GpuMemoryBufferFactoryStub>();
#elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_FUCHSIA)
return std::make_unique<GpuMemoryBufferFactoryNativePixmap>(
vulkan_context_provider);
#elif BUILDFLAG(IS_WIN)
return std::make_unique<GpuMemoryBufferFactoryDXGI>(std::move(io_runner));
#else
return nullptr;
#endif
}
gfx::GpuMemoryBufferHandle GpuMemoryBufferFactory::CreateNativeGmbHandle(
MappableSIClientGmbId id,
const gfx::Size& size,
gfx::BufferFormat format,
gfx::BufferUsage usage) {
// Note that |gmb_id| is used as a cache key in GpuMemoryBufferFactory but
// since we immediately call DestroyGpuMemoryBuffer here, this value does not
// matter. Hence its kept as constant for every client calling this method
// instead of always increasing id. kMappableSIClientId and |gmb_id| will
// ensure that the cache key is always unique and does not clash with
// non-mappable GMB cases.
auto gmb_id = gfx::GpuMemoryBufferId(static_cast<int>(id));
auto handle = CreateGpuMemoryBuffer(gmb_id, size, /*framebuffer_size=*/size,
format, usage, kMappableSIClientId,
gpu::kNullSurfaceHandle);
// Note that this removes the handle from the cache in
// GpuMemoryBufferFactory. Shared image backings caches the handle and still
// has the ref. So the handle is still alive until the mailbox is destroyed.
// This is only needed since we are currently using GpuMemoryBufferFactory.
// TODO(crbug.com/40283108) : Once we remove the GMB abstraction and starts
// using a separate factory to create the native buffers, we can stop
// caching the handles in them, remove using gmb_id and also remove the
// destroy api.
DestroyGpuMemoryBuffer(gmb_id, kMappableSIClientId);
return handle;
}
} // namespace gpu
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