oitResolveTask.h

//
// Copyright 2019 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache 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:
    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