1 /* Test glGenProgramsNV(), glIsProgramNV(), glLoadProgramNV() */
12 #define GL_GLEXT_PROTOTYPES
20 static PFNGLBINDPROGRAMARBPROC glBindProgramARB
= NULL
;
21 static PFNGLGENPROGRAMSARBPROC glGenProgramsARB
= NULL
;
22 static PFNGLPROGRAMSTRINGARBPROC glProgramStringARB
= NULL
;
23 static PFNGLISPROGRAMARBPROC glIsProgramARB
= NULL
;
25 static PFNGLBINDPROGRAMNVPROC glBindProgramNV
= NULL
;
26 static PFNGLGENPROGRAMSNVPROC glGenProgramsNV
= NULL
;
27 static PFNGLLOADPROGRAMNVPROC glLoadProgramNV
= NULL
;
28 static PFNGLISPROGRAMNVPROC glIsProgramNV
= NULL
;
31 static const char *filename
= NULL
;
32 static GLuint nr_steps
= 4;
34 static void usage( char *name
)
36 fprintf( stderr
, "usage: %s [ options ] shader_filename\n", name
);
37 fprintf( stderr
, "\n" );
38 fprintf( stderr
, "options:\n" );
39 fprintf( stderr
, " -f flat shaded\n" );
40 fprintf( stderr
, " -nNr subdivision steps\n" );
41 fprintf( stderr
, " -fps show frames per second\n" );
44 unsigned show_fps
= 0;
45 unsigned int frame_cnt
= 0;
49 void alarmhandler(int);
51 void alarmhandler (int sig
)
54 printf("%d frames in 5.0 seconds = %.3f FPS\n", frame_cnt
,
59 signal(SIGALRM
, alarmhandler
);
65 static void args(int argc
, char *argv
[])
69 for (i
= 1; i
< argc
; i
++) {
70 if (strncmp(argv
[i
], "-n", 2) == 0) {
71 nr_steps
= atoi((argv
[i
]) + 2);
73 else if (strcmp(argv
[i
], "-f") == 0) {
74 glShadeModel(GL_FLAT
);
76 else if (strcmp(argv
[i
], "-fps") == 0) {
79 else if (i
== argc
- 1) {
96 static void Init( void )
104 if ((f
= fopen(filename
, "r")) == NULL
) {
105 fprintf(stderr
, "couldn't open %s\n", filename
);
109 sz
= (GLuint
) fread(buf
, 1, sizeof(buf
), f
);
111 fprintf(stderr
, "file too long\n");
115 fprintf(stderr
, "%.*s\n", sz
, buf
);
117 if (strncmp( buf
, "!!VP", 4 ) == 0) {
119 glBindProgramNV
= (PFNGLBINDPROGRAMNVPROC
) wglGetProcAddress( "glBindProgramNV" );
120 glGenProgramsNV
= (PFNGLGENPROGRAMSNVPROC
) wglGetProcAddress( "glGenProgramsNV" );
121 glLoadProgramNV
= (PFNGLLOADPROGRAMNVPROC
) wglGetProcAddress( "glLoadProgramNV" );
122 glIsProgramNV
= (PFNGLISPROGRAMNVPROC
) wglGetProcAddress( "glIsProgramNV" );
125 glEnable( GL_VERTEX_PROGRAM_NV
);
126 glGenProgramsNV( 1, &prognum
);
127 glBindProgramNV( GL_VERTEX_PROGRAM_NV
, prognum
);
128 glLoadProgramNV( GL_VERTEX_PROGRAM_NV
, prognum
, sz
, (const GLubyte
*) buf
);
129 assert( glIsProgramNV( prognum
) );
133 glBindProgramARB
= (PFNGLBINDPROGRAMARBPROC
) wglGetProcAddress( "glBindProgramARB" );
134 glGenProgramsARB
= (PFNGLGENPROGRAMSARBPROC
) wglGetProcAddress( "glGenProgramsARB" );
135 glProgramStringARB
= (PFNGLPROGRAMSTRINGARBPROC
) wglGetProcAddress( "glProgramStringARB" );
136 glIsProgramARB
= (PFNGLISPROGRAMARBPROC
) wglGetProcAddress( "glIsProgramARB" );
139 glEnable(GL_VERTEX_PROGRAM_ARB
);
141 glGenProgramsARB(1, &prognum
);
143 glBindProgramARB(GL_VERTEX_PROGRAM_ARB
, prognum
);
144 glProgramStringARB(GL_VERTEX_PROGRAM_ARB
, GL_PROGRAM_FORMAT_ASCII_ARB
,
145 sz
, (const GLubyte
*) buf
);
146 assert(glIsProgramARB(prognum
));
149 errno
= glGetError();
150 printf("glGetError = %d\n", errno
);
151 if (errno
!= GL_NO_ERROR
)
155 glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB
, &errorpos
);
156 printf("errorpos: %d\n", errorpos
);
157 printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB
));
161 const float Ambient
[4] = { 0.0, 1.0, 0.0, 0.0 };
162 const float Diffuse
[4] = { 1.0, 0.0, 0.0, 0.0 };
163 const float Specular
[4] = { 0.0, 0.0, 1.0, 0.0 };
164 const float Emission
[4] = { 0.0, 0.0, 0.0, 1.0 };
165 glMaterialfv(GL_FRONT_AND_BACK
, GL_AMBIENT
, Ambient
);
166 glMaterialfv(GL_FRONT_AND_BACK
, GL_DIFFUSE
, Diffuse
);
167 glMaterialfv(GL_FRONT_AND_BACK
, GL_SPECULAR
, Specular
);
168 glMaterialfv(GL_FRONT_AND_BACK
, GL_EMISSION
, Emission
);
181 static void make_midpoint( union vert
*out
,
182 const union vert
*v0
,
183 const union vert
*v1
)
186 for (i
= 0; i
< 6; i
++)
187 out
->f
[i
] = v0
->f
[i
] + .5 * (v1
->f
[i
] - v0
->f
[i
]);
190 static void subdiv( union vert
*v0
,
196 glColor3fv(v0
->v
.color
);
197 glVertex3fv(v0
->v
.pos
);
198 glColor3fv(v1
->v
.color
);
199 glVertex3fv(v1
->v
.pos
);
200 glColor3fv(v2
->v
.color
);
201 glVertex3fv(v2
->v
.pos
);
206 make_midpoint(&m
[0], v0
, v1
);
207 make_midpoint(&m
[1], v1
, v2
);
208 make_midpoint(&m
[2], v2
, v0
);
210 subdiv(&m
[0], &m
[2], v0
, depth
-1);
211 subdiv(&m
[1], &m
[0], v1
, depth
-1);
212 subdiv(&m
[2], &m
[1], v2
, depth
-1);
213 subdiv(&m
[0], &m
[1], &m
[2], depth
-1);
218 #define ASSIGN_3V( V, V0, V1, V2 ) \
225 static void Display( void )
227 glClearColor(0.3, 0.3, 0.3, 1);
228 glClear( GL_COLOR_BUFFER_BIT
| GL_DEPTH_BUFFER_BIT
);
230 glBegin(GL_TRIANGLES
);
236 ASSIGN_3V(v
[0].v
.color
, 0,0,1);
237 ASSIGN_3V(v
[0].v
.pos
, 0.9, -0.9, 0.0);
238 ASSIGN_3V(v
[1].v
.color
, 1,0,0);
239 ASSIGN_3V(v
[1].v
.pos
, 0.9, 0.9, 0.0);
240 ASSIGN_3V(v
[2].v
.color
, 0,1,0);
241 ASSIGN_3V(v
[2].v
.pos
, -0.9, 0, 0.0);
243 subdiv(&v
[0], &v
[1], &v
[2], nr_steps
);
257 static void Reshape( int width
, int height
)
259 glViewport( 0, 0, width
, height
);
260 glMatrixMode( GL_PROJECTION
);
262 glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
263 glMatrixMode( GL_MODELVIEW
);
265 /*glTranslatef( 0.0, 0.0, -15.0 );*/
269 static void Key( unsigned char key
, int x
, int y
)
284 int main( int argc
, char *argv
[] )
286 glutInit( &argc
, argv
);
287 glutInitWindowPosition( 0, 0 );
288 glutInitWindowSize( 250, 250 );
289 glutInitDisplayMode( GLUT_RGB
| GLUT_SINGLE
| GLUT_DEPTH
);
290 glutCreateWindow(argv
[argc
-1]);
291 glutReshapeFunc( Reshape
);
292 glutKeyboardFunc( Key
);
293 glutDisplayFunc( Display
);
298 signal(SIGALRM
, alarmhandler
);