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

   1 /*
   2 ** License Applicability. Except to the extent portions of this file are
   3 ** made subject to an alternative license as permitted in the SGI Free
   4 ** Software License B, Version 1.1 (the "License"), the contents of this
   5 ** file are subject only to the provisions of the License. You may not use
   6 ** this file except in compliance with the License. You may obtain a copy
   7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  12 ** Note that, as provided in the License, the Software is distributed on an
  13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  17 **
  18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  21 ** Copyright in any portions created by third parties is as indicated
  22 ** elsewhere herein. All Rights Reserved.
  23 **
  24 ** Additional Notice Provisions: The application programming interfaces
  25 ** established by SGI in conjunction with the Original Code are The
  26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  31 ** published by SGI, but has not been independently verified as being
  32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  33 */
  34
  35 /*
  36  * glrenderer.h
  37  *
  38  */
  39
  40 #ifndef __gluglrenderer_h_
  41 #define __gluglrenderer_h_
  42
  43 #include <GL/gl.h>
  44 #include <GL/glu.h>
  45 #include "nurbstess.h"
  46 #include "glsurfeval.h"
  47 #include "glcurveval.h"
  48
  49 extern "C" {
  50       typedef void (APIENTRY *errorCallbackType)( GLenum );
  51 }
  52
  53 class GLUnurbs : public NurbsTessellator {
  54
  55 public:
  56                 GLUnurbs( void );
  57     void        loadGLMatrices( void );
  58     void        useGLMatrices( const GLfloat modelMatrix[16],
  59                                const GLfloat projMatrix[16],
  60                                const GLint viewport[4] );
  61     void                setSamplingMatrixIdentity( void );
  62
  63     void        errorHandler( int );
  64     void        bgnrender( void );
  65     void        endrender( void );
  66     void        setautoloadmode( INREAL value )
  67                     {
  68
  69                       if (value) autoloadmode = GL_TRUE;
  70                       else autoloadmode = GL_FALSE;
  71
  72                     }
  73     GLboolean   getautoloadmode( void ) { return autoloadmode; }
  74
  75     errorCallbackType errorCallback;
  76     void        postError( int which )
  77                     { if (errorCallback) (errorCallback)( (GLenum)which ); }
  78 #ifdef _WIN32
  79     void        putSurfCallBack(GLenum which, void (GLAPIENTRY *fn)() )
  80 #else
  81     void        putSurfCallBack(GLenum which, _GLUfuncptr fn )
  82 #endif
  83       {
  84         curveEvaluator.putCallBack(which, fn);
  85         surfaceEvaluator.putCallBack(which, fn);
  86       }
  87
  88     int         get_vertices_call_back()
  89       {
  90         return surfaceEvaluator.get_vertices_call_back();
  91       }
  92
  93     void        put_vertices_call_back(int flag)
  94       {
  95         surfaceEvaluator.put_vertices_call_back(flag);
  96       }
  97
  98     int         get_callback_auto_normal()
  99       {
 100         return surfaceEvaluator.get_callback_auto_normal();
 101       }
 102
 103     void         put_callback_auto_normal(int flag)
 104       {
 105         surfaceEvaluator.put_callback_auto_normal(flag);
 106       }
 107
 108     void       setNurbsCallbackData(void* userData)
 109       {
 110        curveEvaluator.set_callback_userData(userData);
 111        surfaceEvaluator.set_callback_userData(userData);
 112      }
 113
 114
 115     //for LOD
 116     void LOD_eval_list(int level)
 117       {
 118         surfaceEvaluator.LOD_eval_list(level);
 119       }
 120
 121     //NEWCALLBACK
 122     int        is_callback()
 123       {
 124         return callbackFlag;
 125       }
 126     void       put_callbackFlag(int flag)
 127       {
 128         callbackFlag = flag;
 129         surfaceEvaluator.put_vertices_call_back(flag);
 130         curveEvaluator.put_vertices_call_back(flag);
 131       }
 132
 133 private:
 134     GLboolean                   autoloadmode;
 135     OpenGLSurfaceEvaluator      surfaceEvaluator;
 136     OpenGLCurveEvaluator        curveEvaluator;
 137
 138     void                loadSamplingMatrix( const GLfloat vmat[4][4],
 139                                 const GLint viewport[4] );
 140     void                loadCullingMatrix( GLfloat vmat[4][4] );
 141     static void         grabGLMatrix( GLfloat vmat[4][4] );
 142     static void         transform4d( GLfloat A[4], GLfloat B[4],
 143                                 GLfloat mat[4][4] );
 144     static void         multmatrix4d( GLfloat n[4][4], const GLfloat left[4][4],
 145                                 const GLfloat right[4][4] );
 146
 147    int                  callbackFlag;
 148 };
 149
 150 #endif /* __gluglrenderer_h_ */