KeosOGLRenderSystem.h

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/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program 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 program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */

#ifndef KEOS_OGLRENDERSYSTEM_H
#define KEOS_OGLRENDERSYSTEM_H

#include "KeosOGLPrerequisites.h"
#include "KeosRenderSystem.h"
#include "KeosRenderWindow.h"

namespace Keos
{
#define BUFFER_OFFSET(n) ((char*)NULL + (n))

  //-----------------------------------------------------------------------
  class COGLRenderSystem : public IRenderSystem
  {
  public :

    COGLRenderSystem();

    ~COGLRenderSystem();

    const String& GetName(void) const;

    IRenderWindow* CreateRenderWindow(const String &strName, uint nWidth, uint nHeight, uint nColourDepth, bool bFullScreen);

    IRenderWindow* Initialise(bool bAutoCreateWindow, const String& strWindowTitle = "KEOS Render Window");

    void Reinitialise(void); // Used if settings changed mid-rendering

    void Shutdown(void);

    void InitGL(void);

    virtual void BeginScene(void) const;

    virtual void EndScene(void) const;

    virtual void PrintInfo(void) const;

    virtual IBufferBase* _CreateVB(ulong nSize, ulong nStride, ulong nFlags) const;

    virtual IBufferBase* _CreateIB(ulong nSize, ulong nStride, ulong nFlags) const;

    virtual IDeclaration* CreateDeclaration(const TDeclarationElement* Elements, size_t nCount) const;

    virtual void _SetVB(uint nStream, const IBufferBase* pBuffer, ulong nStride, ulong nMinVertex, ulong nMaxVertex);

    virtual void _SetIB(const IBufferBase* pBuffer, ulong nStride);

    virtual void SetDeclaration(const IDeclaration* Declaration);

    virtual void DrawPrimitives(TPrimitiveType Type, ulong nFirstVertex, ulong nCount) const;

    virtual void DrawIndexedPrimitives(TPrimitiveType Type, ulong nFirstIndex, ulong nCount) const;

    virtual void PushMatrix(TMatrixType Type);

    virtual void PopMatrix(TMatrixType Type);

    virtual void LoadMatrix(TMatrixType Type, const CMatrix4& Matrix);

    virtual void LoadMatrixMult(TMatrixType Type, const CMatrix4& Matrix);

    virtual void GetMatrix(TMatrixType Type, CMatrix4& Matrix) const;

    virtual ulong ConvertColor(const CColor& Color) const;

    virtual ITextureBase* CreateTexture(const TVector2I& Size, TPixelFormat Format, ulong nFlags = 0) const;

    virtual void SetTexture(uint nUnit, const ITextureBase* pTexture) const;

    virtual void SetupAlphaBlending(TBlend Src, TBlend Dest) const;

    virtual void SetupTextureUnit(uint nUnit, TTextureOp Op, TTextureArg Arg1, TTextureArg Arg2 = TXA_DIFFUSE, const CColor& Constant = 0x00) const;

    virtual void Enable(TRenderParameter Param, bool bValue) const;

    virtual IShaderBase* CreateShader(CGprogram Program, TShaderType Type) const;

    virtual void SetVertexShader(const IShaderBase* pShader);

    virtual void SetPixelShader(const IShaderBase* pShader);

    virtual void SetClearColor(const CColor& Color);

    virtual void SetLight(uint nIndex, CLight* pLight);

    virtual void SetFillMode(TFillMode Mode);


    // OpenGL extensions
    static PFNGLBINDBUFFERARBPROC               glBindBufferARB;
    static PFNGLDELETEBUFFERSARBPROC            glDeleteBuffersARB;
    static PFNGLGENBUFFERSARBPROC               glGenBuffersARB;
    static PFNGLBUFFERDATAARBPROC               glBufferDataARB;
    static PFNGLBUFFERSUBDATAARBPROC            glBufferSubDataARB;
    static PFNGLGETBUFFERSUBDATAARBPROC         glGetBufferSubDataARB;
    static PFNGLMAPBUFFERARBPROC                glMapBufferARB;
    static PFNGLUNMAPBUFFERARBPROC              glUnmapBufferARB;
    static PFNGLACTIVETEXTUREARBPROC            glActiveTextureARB;
    static PFNGLCLIENTACTIVETEXTUREARBPROC      glClientActiveTextureARB;
    static PFNGLCOMPRESSEDTEXIMAGE2DARBPROC     glCompressedTexImage2DARB;
    static PFNGLCOMPRESSEDTEXSUBIMAGE2DARBPROC  glCompressedTexSubImage2DARB;

  private:

    bool CheckExtension(const String& strExtension) const;

    void LoadExtensions(void);

    const COGLDeclaration* m_CurrentDeclaration;

    ulong m_nIndexStride;

    String m_strExtensions;

    bool m_bGLInitialized;
  };

} // namespace Keos


#endif // KEOS_OGLRENDERSYSTEM_H

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