glrenderer.h revision f220fa62 
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
45extern "C" {
46      typedef void (APIENTRY *errorCallbackType)( GLenum );
47}
48
49class GLUnurbs : public NurbsTessellator {
50
51public:
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
129private:
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