src/glu/sgi/libnurbs/interface/glrenderer.h

   1 /*
   2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice including the dates of first publication and
  13  * either this permission notice or a reference to
  14  * http://oss.sgi.com/projects/FreeB/
  15  * shall be included in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  26  * shall not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization from
  28  * Silicon Graphics, Inc.
  29  */
  30
  31 /*
  32  * glrenderer.h
  33  *
  34  */
  35
  36 #ifndef __gluglrenderer_h_
  37 #define __gluglrenderer_h_
  38
  39 #include <GL/gl.h>
  40 #include <GL/glu.h>
  41 #include "nurbstess.h"
  42 #include "glsurfeval.h"
  43 #include "glcurveval.h"
  44
  45 extern "C" {
  46       typedef void (APIENTRY *errorCallbackType)( GLenum );
  47 }
  48
  49 class GLUnurbs : public NurbsTessellator {
  50
  51 public:
  52                 GLUnurbs( void );
  53     void        loadGLMatrices( void );
  54     void        useGLMatrices( const GLfloat modelMatrix[16],
  55                                const GLfloat projMatrix[16],
  56                                const GLint viewport[4] );
  57     void                setSamplingMatrixIdentity( void );
  58
  59     void        errorHandler( int );
  60     void        bgnrender( void );
  61     void        endrender( void );
  62     void        setautoloadmode( INREAL value )
  63                     {
  64
  65                       if (value) autoloadmode = GL_TRUE;
  66                       else autoloadmode = GL_FALSE;
  67
  68                     }
  69     GLboolean   getautoloadmode( void ) { return autoloadmode; }
  70
  71     errorCallbackType errorCallback;
  72     void        postError( int which )
  73                     { if (errorCallback) (errorCallback)( (GLenum)which ); }
  74 #ifdef _WIN32
  75     void        putSurfCallBack(GLenum which, void (GLAPIENTRY *fn)() )
  76 #else
  77     void        putSurfCallBack(GLenum which, _GLUfuncptr fn )
  78 #endif
  79       {
  80         curveEvaluator.putCallBack(which, fn);
  81         surfaceEvaluator.putCallBack(which, fn);
  82       }
  83
  84     int         get_vertices_call_back()
  85       {
  86         return surfaceEvaluator.get_vertices_call_back();
  87       }
  88
  89     void        put_vertices_call_back(int flag)
  90       {
  91         surfaceEvaluator.put_vertices_call_back(flag);
  92       }
  93
  94     int         get_callback_auto_normal()
  95       {
  96         return surfaceEvaluator.get_callback_auto_normal();
  97       }
  98
  99     void         put_callback_auto_normal(int flag)
 100       {
 101         surfaceEvaluator.put_callback_auto_normal(flag);
 102       }
 103
 104     void       setNurbsCallbackData(void* userData)
 105       {
 106        curveEvaluator.set_callback_userData(userData);
 107        surfaceEvaluator.set_callback_userData(userData);
 108      }
 109
 110
 111     //for LOD
 112     void LOD_eval_list(int level)
 113       {
 114         surfaceEvaluator.LOD_eval_list(level);
 115       }
 116
 117     //NEWCALLBACK
 118     int        is_callback()
 119       {
 120         return callbackFlag;
 121       }
 122     void       put_callbackFlag(int flag)
 123       {
 124         callbackFlag = flag;
 125         surfaceEvaluator.put_vertices_call_back(flag);
 126         curveEvaluator.put_vertices_call_back(flag);
 127       }
 128
 129 private:
 130     GLboolean                   autoloadmode;
 131     OpenGLSurfaceEvaluator      surfaceEvaluator;
 132     OpenGLCurveEvaluator        curveEvaluator;
 133
 134     void                loadSamplingMatrix( const GLfloat vmat[4][4],
 135                                 const GLint viewport[4] );
 136     void                loadCullingMatrix( GLfloat vmat[4][4] );
 137     static void         grabGLMatrix( GLfloat vmat[4][4] );
 138     static void         transform4d( GLfloat A[4], GLfloat B[4],
 139                                 GLfloat mat[4][4] );
 140     static void         multmatrix4d( GLfloat n[4][4], const GLfloat left[4][4],
 141                                 const GLfloat right[4][4] );
 142
 143    int                  callbackFlag;
 144 };
 145
 146 #endif /* __gluglrenderer_h_ */