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