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// Copyright 2018 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dawn_native/SubresourceStorage.h"
#include "dawn_native/dawn_platform.h"
#include <set>
#include <vector>
namespace dawn::native {
// This file declares various "ResourceUsage" structures. They are produced by the frontend
// while recording commands to be used for later validation and also some operations in the
// backends. The are produced by the "Encoder" objects that finalize them on "EndPass" or
// "Finish". Internally the "Encoder" may use the "StateTracker" to create them.
class BufferBase;
class QuerySetBase;
class TextureBase;
// The texture usage inside passes must be tracked per-subresource.
using TextureSubresourceUsage = SubresourceStorage<wgpu::TextureUsage>;
// Which resources are used by a synchronization scope and how they are used. The command
// buffer validation pre-computes this information so that backends with explicit barriers
// don't have to re-compute it.
struct SyncScopeResourceUsage {
std::vector<BufferBase*> buffers;
std::vector<wgpu::BufferUsage> bufferUsages;
std::vector<TextureBase*> textures;
std::vector<TextureSubresourceUsage> textureUsages;
std::vector<ExternalTextureBase*> externalTextures;
// Contains all the resource usage data for a compute pass.
// Essentially a list of SyncScopeResourceUsage, one per Dispatch as required by the WebGPU
// specification. ComputePassResourceUsage also stores nline the set of all buffers and
// textures used, because some unused BindGroups may not be used at all in synchronization
// scope but their resources still need to be validated on Queue::Submit.
struct ComputePassResourceUsage {
// Somehow without this defaulted constructor, MSVC or its STDlib have an issue where they
// use the copy constructor (that's deleted) when doing operations on a
// vector<ComputePassResourceUsage>
ComputePassResourceUsage(ComputePassResourceUsage&&) = default;
ComputePassResourceUsage() = default;
std::vector<SyncScopeResourceUsage> dispatchUsages;
// All the resources referenced by this compute pass for validation in Queue::Submit.
std::set<BufferBase*> referencedBuffers;
std::set<TextureBase*> referencedTextures;
std::set<ExternalTextureBase*> referencedExternalTextures;
// Contains all the resource usage data for a render pass.
// In the WebGPU specification render passes are synchronization scopes but we also need to
// track additional data. It is stored for render passes used by a CommandBuffer, but also in
// RenderBundle so they can be merged into the render passes' usage on ExecuteBundles().
struct RenderPassResourceUsage : public SyncScopeResourceUsage {
// Storage to track the occlusion queries used during the pass.
std::vector<QuerySetBase*> querySets;
std::vector<std::vector<bool>> queryAvailabilities;
using RenderPassUsages = std::vector<RenderPassResourceUsage>;
using ComputePassUsages = std::vector<ComputePassResourceUsage>;
// Contains a hierarchy of "ResourceUsage" that mirrors the hierarchy of the CommandBuffer and
// is used for validation and to produce barriers and lazy clears in the backends.
struct CommandBufferResourceUsage {
RenderPassUsages renderPasses;
ComputePassUsages computePasses;
// Resources used in commands that aren't in a pass.
std::set<BufferBase*> topLevelBuffers;
std::set<TextureBase*> topLevelTextures;
std::set<QuerySetBase*> usedQuerySets;
} // namespace dawn::native