1/**
2 * Enable as much fixed-function vertex processing state as possible
3 * to test fixed-function -> program code generation.
4 */
5
6
7
8#include <GL/glew.h>
9#include <stdio.h>
10#include <string.h>
11#include <stdlib.h>
12#include "glut_wrap.h"
13
14
15static void
16Reshape(int width, int height)
17{
18   glViewport(0, 0, (GLint)width, (GLint)height);
19   glMatrixMode(GL_PROJECTION);
20   glLoadIdentity();
21   glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
22   glMatrixMode(GL_MODELVIEW);
23}
24
25
26static void
27Draw(void)
28{
29   glClear(GL_COLOR_BUFFER_BIT);
30
31   glBegin(GL_TRIANGLES);
32   glColor3f(.8,0,0);
33   glVertex3f(-0.9, -0.9, -30.0);
34   glColor3f(0,.9,0);
35   glVertex3f( 0.9, -0.9, -30.0);
36   glColor3f(0,0,.7);
37   glVertex3f( 0.0,  0.9, -30.0);
38   glEnd();
39
40   glFlush();
41
42   glutSwapBuffers();
43}
44
45
46static void
47Init(void)
48{
49   GLubyte tex[16][16][4];
50   GLfloat pos[4] = {5, 10, 3, 1.0};
51   int i, j;
52
53   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
54   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
55   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
56   fflush(stderr);
57
58   glClearColor(0.3, 0.1, 0.3, 0.0);
59
60   for (i = 0; i < 16; i++) {
61      for (j = 0; j < 16; j++) {
62         if ((i+j) & 1) {
63            tex[i][j][0] = 100;
64            tex[i][j][1] = 100;
65            tex[i][j][2] = 100;
66            tex[i][j][3] = 255;
67         }
68         else {
69            tex[i][j][0] = 200;
70            tex[i][j][1] = 200;
71            tex[i][j][2] = 200;
72            tex[i][j][3] = 255;
73         }
74      }
75   }
76
77
78   glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
79   glFogi(GL_FOG_MODE, GL_LINEAR);
80   glEnable(GL_FOG);
81
82   glPointParameterfv(GL_DISTANCE_ATTENUATION_EXT, pos);
83
84   for (i = 0; i < 8; i++) {
85      GLuint texObj;
86
87      glEnable(GL_LIGHT0 + i);
88      glLightf(GL_LIGHT0 + i, GL_SPOT_EXPONENT, 3.5);
89      glLightf(GL_LIGHT0 + i, GL_SPOT_CUTOFF, 30.);
90      glLightf(GL_LIGHT0 + i, GL_CONSTANT_ATTENUATION, 3.);
91      glLightf(GL_LIGHT0 + i, GL_LINEAR_ATTENUATION, 3.);
92      glLightf(GL_LIGHT0 + i, GL_QUADRATIC_ATTENUATION, 3.);
93      glLightfv(GL_LIGHT0 + i, GL_POSITION, pos);
94
95      glActiveTexture(GL_TEXTURE0 + i);
96      glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
97      glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
98      glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
99      glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
100      glEnable(GL_TEXTURE_GEN_S);
101      glEnable(GL_TEXTURE_GEN_T);
102      glEnable(GL_TEXTURE_GEN_R);
103      glEnable(GL_TEXTURE_GEN_Q);
104      glEnable(GL_TEXTURE_2D);
105
106      glMatrixMode(GL_TEXTURE);
107      glScalef(2.0, 1.0, 3.0);
108
109      glGenTextures(1, &texObj);
110      glBindTexture(GL_TEXTURE_2D, texObj);
111      glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0,
112                   GL_RGBA, GL_UNSIGNED_BYTE, tex);
113      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
114      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
115      glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
116   }
117
118   glEnable(GL_LIGHTING);
119   glActiveTexture(GL_TEXTURE0);
120   glMatrixMode(GL_MODELVIEW);
121}
122
123
124static void
125Key(unsigned char key, int x, int y)
126{
127   if (key == 27) {
128      exit(0);
129   }
130   glutPostRedisplay();
131}
132
133
134int
135main(int argc, char **argv)
136{
137    GLenum type = GLUT_RGB | GLUT_DOUBLE;
138
139    glutInit(&argc, argv);
140    glutInitWindowPosition(0, 0);
141    glutInitWindowSize( 250, 250);
142    glutInitDisplayMode(type);
143    if (glutCreateWindow(*argv) == GL_FALSE) {
144       exit(1);
145    }
146    glewInit();
147    glutReshapeFunc(Reshape);
148    glutKeyboardFunc(Key);
149    glutDisplayFunc(Draw);
150    Init();
151    glutMainLoop();
152    return 0;
153}
154