oitResolveTask.h

//
// Copyright 2019 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HDX_OIT_RESOLVE_TASK_H
#define PXR_IMAGING_HDX_OIT_RESOLVE_TASK_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hdx/api.h"
#include "pxr/imaging/hdx/version.h"
#include "pxr/imaging/hd/task.h"
 
#include <memory>
 
PXR_NAMESPACE_OPEN_SCOPE
 
 
class HdSceneDelegate;
 
using HdRenderPassStateSharedPtr = std::shared_ptr<class HdRenderPassState>;
using HdStRenderPassStateSharedPtr = std::shared_ptr<class HdStRenderPassState>;
 
using HdSt_ImageShaderRenderPassSharedPtr =
    std::shared_ptr<class HdSt_ImageShaderRenderPass>;
using HdStRenderPassShaderSharedPtr =
    std::shared_ptr<class HdStRenderPassShader>;
 
struct HdxOitResolveTaskParams
{
    HdxOitResolveTaskParams()
        : useAovMultiSample(true)
        , resolveAovMultiSample(true)
    {}
 
    bool useAovMultiSample;
    bool resolveAovMultiSample;
};
 
class HdxOitResolveTask : public HdTask 
{
public:
    using TaskParams = HdxOitResolveTaskParams;
 
    HDX_API
    static bool IsOitEnabled();
 
    HDX_API
    HdxOitResolveTask(HdSceneDelegate* delegate, SdfPath const& id);
 
    HDX_API
    ~HdxOitResolveTask() override;
 
    HDX_API
    void Sync(HdSceneDelegate* delegate,
              HdTaskContext* ctx,
              HdDirtyBits* dirtyBits) override;
 
    HDX_API
    void Prepare(HdTaskContext* ctx,
                 HdRenderIndex* renderIndex) override;
 
    HDX_API
    void Execute(HdTaskContext* ctx) override;
 
private:
    HdxOitResolveTask() = delete;
    HdxOitResolveTask(const HdxOitResolveTask &) = delete;
    HdxOitResolveTask &operator =(const HdxOitResolveTask &) = delete;
 
    void _PrepareOitBuffers(
        HdTaskContext* ctx, 
        HdRenderIndex* renderIndex,
        GfVec2i const& screenSize);
 
    GfVec2i _ComputeScreenSize(
        HdTaskContext* ctx,
        HdRenderIndex* renderIndex) const;
 
    const HdRenderPassAovBindingVector& _GetAovBindings(
        HdTaskContext* ctx) const;
 
    void _UpdateCameraFraming(
        HdTaskContext* ctx);
 
    HdRenderPassStateSharedPtr _GetContextRenderPassState(
        HdTaskContext* ctx) const;
 
    HdSt_ImageShaderRenderPassSharedPtr _renderPass;
    HdStRenderPassStateSharedPtr _renderPassState;
    HdStRenderPassShaderSharedPtr _renderPassShader;
 
    GfVec2i _screenSize;
    HdBufferArrayRangeSharedPtr _counterBar;
    HdBufferArrayRangeSharedPtr _dataBar;
    HdBufferArrayRangeSharedPtr _depthBar;
    HdBufferArrayRangeSharedPtr _indexBar;
    HdBufferArrayRangeSharedPtr _uniformBar;
};
 
HDX_API
bool operator==(const HdxOitResolveTaskParams& lhs,
                const HdxOitResolveTaskParams& rhs);
HDX_API
bool operator!=(const HdxOitResolveTaskParams& lhs,
                const HdxOitResolveTaskParams& rhs);
HDX_API
std::ostream& operator<<(std::ostream& out, const HdxOitResolveTaskParams& pv);
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif