GeometryBufferBase.h

/***********************************************************************
    created:    Tue Apr 30 2013
    authors:    Paul D Turner <paul@cegui.org.uk>
                Lukas E Meindl
*************************************************************************/
/***************************************************************************
 *   Copyright (C) 2004 - 2013 Paul D Turner & The CEGUI Development Team
 *
 *   Permission is hereby granted, free of charge, to any person obtaining
 *   a copy of this software and associated documentation files (the
 *   "Software"), to deal in the Software without restriction, including
 *   without limitation the rights to use, copy, modify, merge, publish,
 *   distribute, sublicense, and/or sell copies of the Software, and to
 *   permit persons to whom the Software is furnished to do so, subject to
 *   the following conditions:
 *
 *   The above copyright notice and this permission notice shall be
 *   included in all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *   IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 *   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *   OTHER DEALINGS IN THE SOFTWARE.
 ***************************************************************************/
#ifndef _CEGUIGeometryBufferBase_h_
#define _CEGUIGeometryBufferBase_h_

#include "../../GeometryBuffer.h"
#include "CEGUI/RendererModules/OpenGL/RendererBase.h"
#include "../../Rect.h"
#include "../../Quaternion.h"

#include <utility>
#include <vector>

#if defined(_MSC_VER)
#   pragma warning(push)
#   pragma warning(disable : 4251)
#endif

namespace CEGUI
{
class OpenGLTexture;

class OPENGL_GUIRENDERER_API OpenGLGeometryBufferBase : public GeometryBuffer
{
public:
    OpenGLGeometryBufferBase(OpenGLRendererBase& owner);
    virtual ~OpenGLGeometryBufferBase();

    // implementation of abstract members from GeometryBuffer
    void setTranslation(const Vector3f& t);
    void setRotation(const Quaternion& r);
    void setPivot(const Vector3f& p);
    void setClippingRegion(const Rectf& region);
    void appendVertex(const Vertex& vertex);
    void appendGeometry(const Vertex* const vbuff, uint vertex_count);
    void setActiveTexture(Texture* texture);
    void reset();
    Texture* getActiveTexture() const;
    uint getVertexCount() const;
    uint getBatchCount() const;
    void setRenderEffect(RenderEffect* effect);
    RenderEffect* getRenderEffect();
    void setClippingActive(const bool active);
    bool isClippingActive() const;

    const mat4Pimpl* getMatrix() const;

protected:
    void performBatchManagement();

    void updateMatrix() const;

    struct GLVertex
    {
        float tex[2];
        float colour[4];
        float position[3];
    };

    struct BatchInfo
    {
        uint texture;
        uint vertexCount;
        bool clip;
    };

    OpenGLRendererBase* d_owner;
    OpenGLTexture* d_activeTexture;
    typedef std::vector<BatchInfo> BatchList;
    BatchList d_batches;
    typedef std::vector<GLVertex> VertexList;
    VertexList d_vertices;
    Rectf d_clipRect;
    bool d_clippingActive;
    Vector3f d_translation;
    Quaternion d_rotation;
    Vector3f d_pivot;
    RenderEffect* d_effect;
    mutable mat4Pimpl*              d_matrix;
    mutable bool                    d_matrixValid;
};

}

#if defined(_MSC_VER)
#   pragma warning(pop)
#endif

#endif