/*
 * 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,
                                                           bool avoidBufferAlloc) 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);
    }

    void deviceTick(Context*) override;

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