зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
2.1 KiB
C++
72 строки
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GPU_BUFFER_H_
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#define GPU_BUFFER_H_
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#include "js/RootingAPI.h"
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#include "mozilla/dom/Nullable.h"
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#include "mozilla/ipc/Shmem.h"
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#include "mozilla/webgpu/WebGPUTypes.h"
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#include "ObjectModel.h"
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namespace mozilla {
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namespace ipc {
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class Shmem;
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} // namespace ipc
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namespace webgpu {
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class Device;
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struct MappedInfo {
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ipc::Shmem mShmem;
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// True if mapping is requested for writing.
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bool mWritable = false;
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// Populated by `GetMappedRange`.
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nsTArray<JS::Heap<JSObject*>> mArrayBuffers;
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MappedInfo() = default;
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MappedInfo(const MappedInfo&) = delete;
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bool IsReady() const { return mShmem.IsReadable(); }
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};
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class Buffer final : public ObjectBase, public ChildOf<Device> {
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public:
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GPU_DECL_CYCLE_COLLECTION(Buffer)
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GPU_DECL_JS_WRAP(Buffer)
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Buffer(Device* const aParent, RawId aId, BufferAddress aSize);
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void SetMapped(ipc::Shmem&& aShmem, bool aWritable);
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const RawId mId;
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private:
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virtual ~Buffer();
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void Cleanup();
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// Note: we can't map a buffer with the size that don't fit into `size_t`
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// (which may be smaller than `BufferAddress`), but general not all buffers
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// are mapped.
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const BufferAddress mSize;
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nsString mLabel;
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// Information about the currently active mapping.
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Maybe<MappedInfo> mMapped;
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public:
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already_AddRefed<dom::Promise> MapAsync(uint32_t aMode, uint64_t aOffset,
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const dom::Optional<uint64_t>& aSize,
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ErrorResult& aRv);
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void GetMappedRange(JSContext* aCx, uint64_t aOffset,
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const dom::Optional<uint64_t>& aSize,
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JS::Rooted<JSObject*>* aObject, ErrorResult& aRv);
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void Unmap(JSContext* aCx, ErrorResult& aRv);
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void Destroy();
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};
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} // namespace webgpu
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} // namespace mozilla
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#endif // GPU_BUFFER_H_
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