renderBuffer.h

//
// Copyright 2018 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_HD_RENDER_BUFFER_H
#define PXR_IMAGING_HD_RENDER_BUFFER_H

#include "pxr/pxr.h"
#include "pxr/imaging/hd/api.h"
#include "pxr/imaging/hd/bprim.h"

#include "pxr/base/gf/vec2i.h"

PXR_NAMESPACE_OPEN_SCOPE




class HdRenderBuffer : public HdBprim
{
public:
    // change tracking for HdRenderBuffer
    enum DirtyBits : HdDirtyBits {
        Clean               = 0,
        DirtyDescription    = 1 << 0,
        AllDirty            = (DirtyDescription)
    };

    HD_API
    HdRenderBuffer(SdfPath const& id);
    HD_API
    ~HdRenderBuffer() override;

    // ---------------------------------------------------------------------- //
    // ---------------------------------------------------------------------- //

    HD_API
    HdDirtyBits GetInitialDirtyBitsMask() const override;

    HD_API
    void Sync(HdSceneDelegate *sceneDelegate,
              HdRenderParam *renderParam,
              HdDirtyBits *dirtyBits) override;

    HD_API
    void Finalize(HdRenderParam *renderParam) override;

    // ---------------------------------------------------------------------- //
    // ---------------------------------------------------------------------- //

    virtual bool Allocate(GfVec3i const& dimensions,
                          HdFormat format,
                          bool multiSampled) = 0;

    virtual unsigned int GetWidth() const = 0;
    virtual unsigned int GetHeight() const = 0;
    virtual unsigned int GetDepth() const = 0;
    virtual HdFormat GetFormat() const = 0;
    virtual bool IsMultiSampled() const = 0;

    virtual void* Map() = 0;
    virtual void Unmap() = 0;
    virtual bool IsMapped() const = 0;

    virtual void Resolve() = 0;

    virtual bool IsConverged() const = 0;

    virtual VtValue GetResource(bool multiSampled) const {return VtValue();}

protected:
    virtual void _Deallocate() = 0;
};

PXR_NAMESPACE_CLOSE_SCOPE

#endif // PXR_IMAGING_HD_RENDER_BUFFER_H