5 #define GL_GLEXT_PROTOTYPES
11 static void Init( void )
13 static const char *modulate2D
=
17 "SGE R0, fragment.color, fragment.color.yzxw; \n"
18 "SGE R1, fragment.color, fragment.color.zxyw; \n"
20 "MUL result.color, R0, fragment.color; \n"
25 if (!glutExtensionSupported("GL_ARB_fragment_program")) {
26 printf("Error: GL_ARB_fragment_program not supported!\n");
29 printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER
));
31 /* Setup the fragment program */
32 glGenProgramsARB(1, &modulateProg
);
33 glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB
, modulateProg
);
34 glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB
, GL_PROGRAM_FORMAT_ASCII_ARB
,
35 strlen(modulate2D
), (const GLubyte
*)modulate2D
);
37 printf("glGetError = 0x%x\n", (int) glGetError());
38 printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
39 (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB
));
41 glEnable(GL_FRAGMENT_PROGRAM_ARB
);
43 glClearColor(.3, .3, .3, 0);
46 static void Reshape(int width
, int height
)
49 glViewport(0, 0, (GLint
)width
, (GLint
)height
);
51 glMatrixMode(GL_PROJECTION
);
53 glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
54 glMatrixMode(GL_MODELVIEW
);
57 static void Key(unsigned char key
, int x
, int y
)
70 static void Draw(void)
72 glClear(GL_COLOR_BUFFER_BIT
);
74 glBegin(GL_TRIANGLES
);
76 glVertex3f( 0.9, -0.9, -30.0);
78 glVertex3f( 0.9, 0.9, -30.0);
80 glVertex3f(-0.9, 0.0, -30.0);
89 int main(int argc
, char **argv
)
93 glutInit(&argc
, argv
);
97 glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
101 glutInitDisplayMode(type
);
103 if (glutCreateWindow("First Tri") == GL_FALSE
) {
109 glutReshapeFunc(Reshape
);
110 glutKeyboardFunc(Key
);
111 glutDisplayFunc(Draw
);