DawnSharedContext.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_DawnSharedContext_DEFINED
#define skgpu_graphite_DawnSharedContext_DEFINED
 
#include "webgpu/webgpu_cpp.h"  // NO_G3_REWRITE
 
#include "include/gpu/graphite/dawn/DawnBackendContext.h"
#include "src/gpu/graphite/SharedContext.h"
#include "src/gpu/graphite/dawn/DawnCaps.h"
 
namespace skgpu::graphite {
 
struct DawnBackendContext;
struct ContextOptions;
 
class DawnSharedContext final : public SharedContext {
public:
    static sk_sp<SharedContext> Make(const DawnBackendContext&, const ContextOptions&);
    ~DawnSharedContext() override;
 
    std::unique_ptr<ResourceProvider> makeResourceProvider(SingleOwner*,
                                                           uint32_t recorderID,
                                                           size_t resourceBudget) override;
 
    const DawnCaps* dawnCaps() const { return static_cast<const DawnCaps*>(this->caps()); }
    const wgpu::Device& device() const { return fDevice; }
    const wgpu::Queue& queue() const { return fQueue; }
    const wgpu::ShaderModule& noopFragment() const { return fNoopFragment; }
 
    bool hasTick() const { return fTick; }
 
    void tick() const {
        SkASSERT(this->hasTick());
        fTick(fInstance);
    }
 
private:
    DawnSharedContext(const DawnBackendContext&,
                      std::unique_ptr<const DawnCaps> caps,
                      wgpu::ShaderModule noopFragment);
 
    wgpu::Instance     fInstance;
    wgpu::Device       fDevice;
    wgpu::Queue        fQueue;
    DawnTickFunction*  fTick;
    // A noop fragment shader, it is used to workaround dawn a validation error(dawn doesn't allow
    // a pipeline with a color attachment but without a fragment shader).
    wgpu::ShaderModule fNoopFragment;
};
 
} // namespace skgpu::graphite
 
#endif // skgpu_graphite_DawnSharedContext_DEFINED