oitBufferAccessor.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_BUFFER_ACCESSOR_H
#define PXR_IMAGING_HDX_OIT_BUFFER_ACCESSOR_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 Hgi;
 
using HdBufferArrayRangeSharedPtr = 
    std::shared_ptr<class HdBufferArrayRange>;
 
using HdStRenderPassShaderSharedPtr =
    std::shared_ptr<class HdStRenderPassShader>;
 
class HdxOitBufferAccessor {
public:
    static bool IsOitEnabled();
 
    HDX_API
    HdxOitBufferAccessor(HdTaskContext *ctx);
 
    HDX_API
    void RequestOitBuffers();
 
    HDX_API
    void InitializeOitBuffersIfNecessary(Hgi *hgi);
 
    HDX_API
    bool AddOitBufferBindings(const HdStRenderPassShaderSharedPtr &);
 
private:
    HdBufferArrayRangeSharedPtr const &_GetBar(const TfToken &);
 
    HdTaskContext * const _ctx;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif