DawnResourceProvider.h

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/*
 * Copyright 2022 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef skgpu_graphite_DawnResourceProvider_DEFINED
#define skgpu_graphite_DawnResourceProvider_DEFINED
 
#include "include/gpu/graphite/dawn/DawnTypes.h"
#include "src/core/SkLRUCache.h"
#include "src/core/SkTHash.h"
#include "src/gpu/graphite/ResourceProvider.h"
 
namespace skgpu::graphite {
 
class DawnGraphicsPipeline;
class DawnSampler;
class DawnSharedContext;
class DawnTexture;
class DawnBuffer;
 
class DawnResourceProvider final : public ResourceProvider {
public:
    DawnResourceProvider(SharedContext* sharedContext,
                         SingleOwner*,
                         uint32_t recorderID,
                         size_t resourceBudget);
    ~DawnResourceProvider() override;
 
    sk_sp<Texture> createWrappedTexture(const BackendTexture&) override;
 
    sk_sp<DawnTexture> findOrCreateDiscardableMSAALoadTexture(SkISize dimensions,
                                                              const TextureInfo& msaaInfo);
 
    wgpu::RenderPipeline findOrCreateBlitWithDrawPipeline(const RenderPassDesc& renderPassDesc);
 
    sk_sp<DawnBuffer> findOrCreateDawnBuffer(size_t size,
                                             BufferType type,
                                             AccessPattern,
                                             std::string_view label);
 
    const wgpu::BindGroupLayout& getOrCreateUniformBuffersBindGroupLayout();
    const wgpu::BindGroupLayout& getOrCreateSingleTextureSamplerBindGroupLayout();
 
    // Find the cached bind group or create a new one based on the bound buffers and their
    // binding sizes (boundBuffersAndSizes) for these uniforms (in order):
    // - Intrinsic constants.
    // - Render step uniforms.
    // - Paint uniforms.
    const wgpu::BindGroup& findOrCreateUniformBuffersBindGroup(
            const std::array<std::pair<const DawnBuffer*, uint32_t>, 3>& boundBuffersAndSizes);
 
    // Find or create a bind group containing the given sampler & texture.
    const wgpu::BindGroup& findOrCreateSingleTextureSamplerBindGroup(const DawnSampler* sampler,
                                                                     const DawnTexture* texture);
 
private:
    sk_sp<GraphicsPipeline> createGraphicsPipeline(const RuntimeEffectDictionary*,
                                                   const GraphicsPipelineDesc&,
                                                   const RenderPassDesc&) override;
    sk_sp<ComputePipeline> createComputePipeline(const ComputePipelineDesc&) override;
 
    sk_sp<Texture> createTexture(SkISize, const TextureInfo&, skgpu::Budgeted) override;
    sk_sp<Buffer> createBuffer(size_t size,
                               BufferType type,
                               AccessPattern,
                               std::string_view label) override;
 
    sk_sp<Sampler> createSampler(const SamplerDesc&) override;
 
    BackendTexture onCreateBackendTexture(SkISize dimensions, const TextureInfo&) override;
    void onDeleteBackendTexture(const BackendTexture&) override;
 
    const wgpu::Buffer& getOrCreateNullBuffer();
 
    DawnSharedContext* dawnSharedContext() const;
 
    skia_private::THashMap<uint64_t, wgpu::RenderPipeline> fBlitWithDrawPipelines;
 
    wgpu::BindGroupLayout fUniformBuffersBindGroupLayout;
    wgpu::BindGroupLayout fSingleTextureSamplerBindGroupLayout;
 
    wgpu::Buffer fNullBuffer;
 
    struct UniqueKeyHash {
        uint32_t operator()(const skgpu::UniqueKey& key) const { return key.hash(); }
    };
 
    using BindGroupCache = SkLRUCache<UniqueKey, wgpu::BindGroup, UniqueKeyHash>;
 
    BindGroupCache fUniformBufferBindGroupCache;
    BindGroupCache fSingleTextureSamplerBindGroups;
};
 
} // namespace skgpu::graphite
 
#endif // skgpu_graphite_DawnResourceProvider_DEFINED