5
#define GL_GLEXT_PROTOTYPES
10
static void Init( void )
12
static const char *modulate2D =
15
"EX2 R0, fragment.color.x; \n"
16
"SUB result.color, R0, {1.0}.x; \n"
21
if (!glutExtensionSupported("GL_ARB_fragment_program")) {
22
printf("Error: GL_ARB_fragment_program not supported!\n");
25
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
27
/* Setup the fragment program */
28
glGenProgramsARB(1, &modulateProg);
29
glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, modulateProg);
30
glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
31
strlen(modulate2D), (const GLubyte *)modulate2D);
33
printf("glGetError = 0x%x\n", (int) glGetError());
34
printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
35
(char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
37
glEnable(GL_FRAGMENT_PROGRAM_ARB);
39
glClearColor(.3, .3, .3, 0);
42
static void Reshape(int width, int height)
45
glViewport(0, 0, (GLint)width, (GLint)height);
47
glMatrixMode(GL_PROJECTION);
49
glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
50
glMatrixMode(GL_MODELVIEW);
53
static void Key(unsigned char key, int x, int y)
66
static void Draw(void)
68
glClear(GL_COLOR_BUFFER_BIT);
70
glBegin(GL_TRIANGLES);
72
glVertex3f( 0.9, -0.9, -30.0);
74
glVertex3f( 0.9, 0.9, -30.0);
76
glVertex3f(-0.9, 0.0, -30.0);
85
int main(int argc, char **argv)
89
glutInit(&argc, argv);
93
glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
97
glutInitDisplayMode(type);
99
if (glutCreateWindow("First Tri") == GL_FALSE) {
105
glutReshapeFunc(Reshape);
106
glutKeyboardFunc(Key);
107
glutDisplayFunc(Draw);