gzGraphicsEngine.h

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//*****************************************************************************
// File         : gzGraphicsEngine.h
// Module       : 
// Description  : Class definition of stub calls
// Author       : Anders Modén      
// Product      : Gizmo3D 2.1.1
//      
// Copyright © 2003- Saab Training Systems AB, Sweden
//          
// NOTE:    Gizmo3D is a high performance 3D Scene Graph and effect visualisation 
//          C++ toolkit for Linux, Mac OS X, Windows (Win32) and IRIX® for  
//          usage in Game or VisSim development.
//
//
// Revision History...                          
//                                  
// Who  Date    Description                     
//                                  
// AMO  990217  Created file    
//
//******************************************************************************

#ifndef __GZ_GRAPHICS_ENGINE_H__
#define __GZ_GRAPHICS_ENGINE_H__

#include "gzBasicTypes.h"
#include "gzGraphicsAbstractionLayer.h"
#include "gzBase.h"


enum gzEngineType
{ 
    GZ_ENGINE_NONE      = -1 , 
    GZ_ENGINE_DEBUG     =  0 , 
    GZ_ENGINE_SOFTWARE  =  1 , 
    GZ_ENGINE_OPENGL    =  2 , 
    GZ_ENGINE_DIRECTX   =  3 ,
} ;

enum gzEngineVendor
{
    GZ_ENGINE_VENDOR_UNKNOWN    =   0,
    GZ_ENGINE_VENDOR_NVIDIA     =   1,
    GZ_ENGINE_VENDOR_ATI        =   2,
    GZ_ENGINE_VENDOR_MATROX     =   3,
    GZ_ENGINE_VENDOR_INTEL      =   4,
    GZ_ENGINE_VENDOR_MESA       =   5,
};

const gzUByte GZ_MAX_3D_ENGINES=10;

//-------------------- engine dependant implementations ------------------------

//******************************************************************************
// Class    : gzGraphicsEngine
//                                  
// Purpose  : -
//                                  
// Notes    : - 
//                                  
// Revision History...                          
//                                  
// Who  Date    Description                     
//                                  
// AMO  990217  Created 
//                                  
//******************************************************************************
class gzGraphicsEngine
{
public:

    // ------------------- extensions. Not basically supported by Engine --------------------

    GZ_GRAPH_EXPORT static  inline  gzBool  has_vertex_array()              { return s_vertex_array; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_polygon_offset()            { return s_polygon_offset; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_multitexture()              { return s_multitexture; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_compiled_vertex_array()     { return s_compiled_vertex_array; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_texenvop()                  { return s_texenvop; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_pbuffer()                   { return s_pbuffer; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_compressed_textures()       { return s_compressed_textures; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_compressed_s3tc()           { return s_compressed_s3tc; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_depth_clamp()               { return s_depth_clamp; }
    
    GZ_GRAPH_EXPORT static  inline  gzBool  has_vertex_program()            { return s_vertex_program; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_fragment_program()          { return s_fragment_program; }
    
    GZ_GRAPH_EXPORT static  inline  gzBool  has_vertex_buffer_object()      { return s_vertex_buffer_object; }
    
    GZ_GRAPH_EXPORT static  inline  gzBool  has_two_sided_stencil()         { return s_two_sided_stencil; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_separate_stencil()          { return s_separate_stencil; }

    GZ_GRAPH_EXPORT static  inline  gzBool  has_shader_objects()            { return s_shader_objects; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_vertex_shader()             { return s_vertex_shader; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_fragment_shader()           { return s_fragment_shader; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_multisample()               { return s_multisample; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_auto_mipmap()               { return s_auto_mipmap; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_npot_texture()              { return s_npot_texture; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_pixel_buffer_object()       { return s_pixel_buffer_object; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_geometry_shader()           { return s_geometry_shader; }
    GZ_GRAPH_EXPORT static  inline  gzBool  has_draw_instanced()            { return s_draw_instanced; }

    // --- limits ------

    GZ_GRAPH_EXPORT static  inline  gzInt   getMaxTextureSize()             { return s_maxtexturesize; }

    GZ_GRAPH_EXPORT static  inline  gzULong getNumberOfTextureUnits()       { return s_numberOfTextureUnits; }

    GZ_GRAPH_EXPORT static  inline  gzBool  isRemoteConnection()            { return s_remoteConnection; }
    
    // --- generic -----

    GZ_GRAPH_EXPORT static  inline  gzEngineVendor  getEngineVendor()       { return s_engineVendor; }
    GZ_GRAPH_EXPORT static gzBool                   hasValidEngine();
    GZ_GRAPH_EXPORT static gzVoid                   useEngine(gzEngineType type);
    GZ_GRAPH_EXPORT static gzEngineType             getEngineType();
    GZ_GRAPH_EXPORT static gzGraphicsEngine *       getEngine();
    GZ_GRAPH_EXPORT static gzFloat                  getVersion();
    GZ_GRAPH_EXPORT static gzFloat                  getShaderVersion();
    GZ_GRAPH_EXPORT static gzString                 getExtensions();

    GZ_GRAPH_EXPORT static gzVoid       disableAllClientStates(gzBool disableAllTextureUnits=TRUE);

    // Engine functions
    
    GZ_GRAPH_EXPORT virtual gzVoid setupEngine()=0;
    GZ_GRAPH_EXPORT virtual gzVoid shutdownEngine()=0;
    
protected:


    GZ_GRAPH_EXPORT static gzBool   s_vertex_array;
    GZ_GRAPH_EXPORT static gzBool   s_compiled_vertex_array;
    GZ_GRAPH_EXPORT static gzBool   s_multitexture;
    GZ_GRAPH_EXPORT static gzBool   s_texenvop;
    GZ_GRAPH_EXPORT static gzBool   s_pbuffer;
    GZ_GRAPH_EXPORT static gzBool   s_polygon_offset;
    GZ_GRAPH_EXPORT static gzBool   s_compressed_textures;
    GZ_GRAPH_EXPORT static gzBool   s_compressed_s3tc;
    GZ_GRAPH_EXPORT static gzBool   s_depth_clamp;
    GZ_GRAPH_EXPORT static gzBool   s_vertex_program;
    GZ_GRAPH_EXPORT static gzBool   s_fragment_program;
    GZ_GRAPH_EXPORT static gzBool   s_vertex_buffer_object;
    GZ_GRAPH_EXPORT static gzBool   s_two_sided_stencil;
    GZ_GRAPH_EXPORT static gzBool   s_separate_stencil;
    GZ_GRAPH_EXPORT static gzBool   s_shader_objects;
    GZ_GRAPH_EXPORT static gzBool   s_vertex_shader;
    GZ_GRAPH_EXPORT static gzBool   s_fragment_shader;
    GZ_GRAPH_EXPORT static gzBool   s_multisample;
    GZ_GRAPH_EXPORT static gzBool   s_auto_mipmap;
    GZ_GRAPH_EXPORT static gzBool   s_npot_texture;
    GZ_GRAPH_EXPORT static gzBool   s_pixel_buffer_object;
    GZ_GRAPH_EXPORT static gzBool   s_geometry_shader;
    GZ_GRAPH_EXPORT static gzBool   s_draw_instanced;

    GZ_GRAPH_EXPORT static gzInt                s_maxtexturesize;

    GZ_GRAPH_EXPORT static gzUInt               s_numberOfTextureUnits;


    GZ_GRAPH_EXPORT static gzString             s_gz_extensions;
    GZ_GRAPH_EXPORT static gzFloat              s_gz_version;
    GZ_GRAPH_EXPORT static gzEngineType         s_engineType;
    GZ_GRAPH_EXPORT static gzGraphicsEngine *   s_currentEngine;
    GZ_GRAPH_EXPORT static gzEngineVendor       s_engineVendor;

    GZ_GRAPH_EXPORT static gzBool               s_remoteConnection;
    GZ_GRAPH_EXPORT static gzFloat              s_shader_version;
    GZ_GRAPH_EXPORT static gzGraphicsEngine *   s_engine[GZ_MAX_3D_ENGINES];
};


#endif

---