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// Copyright 2017 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef DAWNNATIVE_BUFFER_H_
#define DAWNNATIVE_BUFFER_H_
#include "dawn_native/Error.h"
#include "dawn_native/Forward.h"
#include "dawn_native/ObjectBase.h"
#include "dawn_native/dawn_platform.h"
#include <memory>
namespace dawn_native {
MaybeError ValidateBufferDescriptor(DeviceBase* device, const BufferDescriptor* descriptor);
static constexpr wgpu::BufferUsage kReadOnlyBufferUsages =
wgpu::BufferUsage::MapRead | wgpu::BufferUsage::CopySrc | wgpu::BufferUsage::Index |
wgpu::BufferUsage::Vertex | wgpu::BufferUsage::Uniform | kReadOnlyStorageBuffer;
class BufferBase : public ObjectBase {
enum class BufferState {
Unmapped,
Mapped,
MappedAtCreation,
Destroyed,
};
public:
BufferBase(DeviceBase* device, const BufferDescriptor* descriptor);
static BufferBase* MakeError(DeviceBase* device, const BufferDescriptor* descriptor);
uint64_t GetSize() const;
wgpu::BufferUsage GetUsage() const;
MaybeError MapAtCreation();
void OnMapCommandSerialFinished(uint32_t mapSerial, bool isWrite);
MaybeError ValidateCanUseOnQueueNow() const;
bool IsFullBufferRange(uint64_t offset, uint64_t size) const;
bool IsDataInitialized() const;
void SetIsDataInitialized();
// Dawn API
void SetSubData(uint64_t start, uint64_t count, const void* data);
void MapReadAsync(WGPUBufferMapReadCallback callback, void* userdata);
void MapWriteAsync(WGPUBufferMapWriteCallback callback, void* userdata);
void* GetMappedRange();
const void* GetConstMappedRange();
void Unmap();
void Destroy();
protected:
BufferBase(DeviceBase* device,
const BufferDescriptor* descriptor,
ObjectBase::ErrorTag tag);
~BufferBase() override;
void DestroyInternal();
bool IsMapped() const;
private:
virtual MaybeError MapAtCreationImpl() = 0;
virtual MaybeError MapReadAsyncImpl() = 0;
virtual MaybeError MapWriteAsyncImpl() = 0;
virtual void UnmapImpl() = 0;
virtual void DestroyImpl() = 0;
virtual void* GetMappedPointerImpl() = 0;
virtual bool IsMapWritable() const = 0;
MaybeError CopyFromStagingBuffer();
void* GetMappedRangeInternal(bool writable);
void CallMapReadCallback(uint32_t serial,
WGPUBufferMapAsyncStatus status,
const void* pointer,
uint64_t dataLength);
void CallMapWriteCallback(uint32_t serial,
WGPUBufferMapAsyncStatus status,
void* pointer,
uint64_t dataLength);
MaybeError ValidateMap(wgpu::BufferUsage requiredUsage,
WGPUBufferMapAsyncStatus* status) const;
MaybeError ValidateUnmap() const;
MaybeError ValidateDestroy() const;
bool CanGetMappedRange(bool writable) const;
uint64_t mSize = 0;
wgpu::BufferUsage mUsage = wgpu::BufferUsage::None;
WGPUBufferMapReadCallback mMapReadCallback = nullptr;
WGPUBufferMapWriteCallback mMapWriteCallback = nullptr;
void* mMapUserdata = 0;
uint32_t mMapSerial = 0;
std::unique_ptr<StagingBufferBase> mStagingBuffer;
BufferState mState;
bool mIsDataInitialized = false;
};
} // namespace dawn_native
#endif // DAWNNATIVE_BUFFER_H_