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      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_ */
    147