OsgRenderTarget.h

// This file is a part of the OpenSurgSim project.
// Copyright 2013, SimQuest Solutions Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef SURGSIM_GRAPHICS_OSGRENDERTARGET_H
#define SURGSIM_GRAPHICS_OSGRENDERTARGET_H

#include <memory>
#include <unordered_map>

#include "SurgSim/Graphics/RenderTarget.h"
#include "SurgSim/Graphics/OsgTexture.h"
#include "SurgSim/Graphics/OsgTexture2d.h"
#include "SurgSim/Graphics/OsgTextureRectangle.h"

#include <osg/FrameBufferObject>

namespace SurgSim
{
namespace Graphics
{


class OsgAbstractRenderTarget : public RenderTarget
{
    virtual std::shared_ptr<OsgTexture> getColorTargetOsg(int index) const = 0;

    virtual std::shared_ptr<OsgTexture> getDepthTargetOsg() const = 0;
};

template <class T>
class OsgRenderTarget : public OsgAbstractRenderTarget
{
public:

    typedef T TextureType;

    OsgRenderTarget();

    OsgRenderTarget(int width, int height, double scale = 1.0,
        int colorCount = 0, bool useDepth = false, bool useFloat = false);
    ~OsgRenderTarget();

    void getSize(int* width, int* height) const override;

    int getColorTargetCount() const override;

    std::shared_ptr<Texture> getColorTarget(int index) const override;

    std::shared_ptr<OsgTexture> getColorTargetOsg(int index) const;

    bool doesUseDepthTarget() const override;

    std::shared_ptr<Texture> getDepthTarget() const override;

    std::shared_ptr<OsgTexture> getDepthTargetOsg() const;

private:

    enum TargetTypes {
        TARGETTYPE_DEPTH = 0,
        TARGETTYPE_COLORBASE = 1
    };

    int m_width;

    int m_height;

    int m_colorTargetCount;

    std::vector<std::shared_ptr<TextureType>> m_textures;

    int setColorTargetCount(int count, bool floatColor);

    void useDepthTarget(bool val);

    void setupTexture(int type, bool floatColor);
};

typedef OsgRenderTarget<OsgTexture2d> OsgRenderTarget2d;
typedef OsgRenderTarget<OsgTextureRectangle> OsgRenderTargetRectangle;

}; // Graphics
}; // SurgSim

#include "SurgSim/Graphics/OsgRenderTarget-inl.h"

#endif