frameBufferObject.h

/* Copyright (c) 2008-2015, Cedric Stalder <cedric.stalder@gmail.com>
 *                          Stefan Eilemann <eile@equalizergraphics.com>
 *                          Daniel Nachbaur <danielnachbaur@gmail.com>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef EQUTIL_FRAMEBUFFEROBJECT_H
#define EQUTIL_FRAMEBUFFEROBJECT_H

#include <eq/util/texture.h> // member
#include <eq/util/types.h>

#include <vector>

namespace eq
{
namespace util
{
class FrameBufferObject
{
public:
    EQ_API FrameBufferObject(const GLEWContext* const glewContext,
                             const unsigned textureTarget = 0x84F5
                             /*GL_TEXTURE_RECTANGLE_ARB*/);

    EQ_API ~FrameBufferObject();

    EQ_API bool addColorTexture();

    EQ_API Error init(const int32_t width, const int32_t height,
                      const unsigned colorFormat, const int32_t depthSize,
                      const int32_t stencilSize, const int32_t samplesSize = 1);

    EQ_API void exit();

    EQ_API void bind(const uint32_t target = 0x8D40 /*GL_FRAMEBUFFER_EXT*/);

    EQ_API void unbind(const uint32_t target = 0x8D40 /*GL_FRAMEBUFFER_EXT*/);

    EQ_API Error resize(const int32_t width, const int32_t height);

    int32_t getWidth() const
    {
        LBASSERT(!_colors.empty());
        return _colors.front()->getWidth();
    }

    int32_t getHeight() const
    {
        LBASSERT(!_colors.empty());
        return _colors.front()->getHeight();
    }

    const Textures& getColorTextures() const { return _colors; }
    const Texture& getDepthTexture() const { return _depth; }
    const GLEWContext* glewGetContext() const { return _glewContext; }
    bool isValid() const { return _valid; }
private:
    unsigned _fboID; 

    Textures _colors; 
    Texture _depth;

    const GLEWContext* const _glewContext;

    bool _valid;

    LB_TS_VAR(_thread);

    Error _checkStatus();
};
}
}

#endif // EQUTIL_FRAMEBUFFEROBJECT_H