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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /dom/webgpu/Buffer.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/webgpu/Buffer.h')
-rw-r--r--dom/webgpu/Buffer.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/dom/webgpu/Buffer.h b/dom/webgpu/Buffer.h
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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/webgpu/WebGPUTypes.h"
+#include "nsTArray.h"
+#include "ObjectModel.h"
+#include "mozilla/ipc/RawShmem.h"
+#include <memory>
+
+namespace mozilla {
+class ErrorResult;
+
+namespace dom {
+struct GPUBufferDescriptor;
+template <typename T>
+class Optional;
+enum class GPUBufferMapState : uint8_t;
+} // namespace dom
+
+namespace webgpu {
+
+class Device;
+
+struct MappedInfo {
+ // True if mapping is requested for writing.
+ bool mWritable = false;
+ // Populated by `GetMappedRange`.
+ nsTArray<JS::Heap<JSObject*>> mArrayBuffers;
+ BufferAddress mOffset;
+ BufferAddress mSize;
+ MappedInfo() = default;
+ MappedInfo(const MappedInfo&) = delete;
+};
+
+class Buffer final : public ObjectBase, public ChildOf<Device> {
+ public:
+ NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(Buffer)
+ NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(Buffer)
+ GPU_DECL_JS_WRAP(Buffer)
+
+ static already_AddRefed<Buffer> Create(Device* aDevice, RawId aDeviceId,
+ const dom::GPUBufferDescriptor& aDesc,
+ ErrorResult& aRv);
+
+ 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(JSContext* aCx, ErrorResult& aRv);
+
+ const RawId mId;
+
+ uint64_t Size() const { return mSize; }
+ uint32_t Usage() const { return mUsage; }
+ dom::GPUBufferMapState MapState() const;
+
+ private:
+ Buffer(Device* const aParent, RawId aId, BufferAddress aSize, uint32_t aUsage,
+ ipc::WritableSharedMemoryMapping&& aShmem);
+ virtual ~Buffer();
+ Device& GetDevice() { return *mParent; }
+ void Drop();
+ void UnmapArrayBuffers(JSContext* aCx, ErrorResult& aRv);
+ void RejectMapRequest(dom::Promise* aPromise, nsACString& message);
+ void AbortMapRequest();
+ void SetMapped(BufferAddress aOffset, BufferAddress aSize, bool aWritable);
+
+ // 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;
+ const uint32_t mUsage;
+ nsString mLabel;
+ // Information about the currently active mapping.
+ Maybe<MappedInfo> mMapped;
+ RefPtr<dom::Promise> mMapRequest;
+ // mShmem does not point to a shared memory segment if the buffer is not
+ // mappable.
+ std::shared_ptr<ipc::WritableSharedMemoryMapping> mShmem;
+};
+
+} // namespace webgpu
+} // namespace mozilla
+
+#endif // GPU_BUFFER_H_