1/*
2 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and
5 * its documentation for any purpose is hereby granted without fee, provided
6 * that (i) the above copyright notices and this permission notice appear in
7 * all copies of the software and related documentation, and (ii) the name of
8 * Silicon Graphics may not be used in any advertising or
9 * publicity relating to the software without the specific, prior written
10 * permission of Silicon Graphics.
11 *
12 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
13 * ANY KIND,
14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 *
17 * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
18 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 * OF THIS SOFTWARE.
23 */
24
25#include <stdio.h>
26#include <string.h>
27#include <stdlib.h>
28#include <GL/glew.h>
29#include "glut_wrap.h"
30
31
32#define CI_OFFSET_1 16
33#define CI_OFFSET_2 32
34
35
36GLenum doubleBuffer;
37
38static void Init(void)
39{
40   GLint errnum;
41   GLuint prognum;
42   static const char *prog1 =
43      "!!ARBfp1.0\n"
44      "MOV  result.color, fragment.texcoord[1];\n"
45      /* "MOV  result.color, fragment.color;\n" */
46      "END\n";
47
48
49   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
50   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
51   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
52   fflush(stderr);
53
54   /* Setup the fragment program */
55   glGenProgramsARB(1, &prognum);
56   glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, prognum);
57   glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
58                      strlen(prog1), (const GLubyte *)prog1);
59
60   errnum = glGetError();
61   printf("glGetError = 0x%x\n", errnum);
62   if (errnum != GL_NO_ERROR) {
63      GLint errorpos;
64
65      glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
66      printf("errorpos: %d\n", errorpos);
67      printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
68             (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
69   }
70   glEnable(GL_FRAGMENT_PROGRAM_ARB);
71
72    glClearColor(0.0, 0.0, 1.0, 0.0);
73}
74
75static void Reshape(int width, int height)
76{
77
78    glViewport(0, 0, (GLint)width, (GLint)height);
79
80    glMatrixMode(GL_PROJECTION);
81    glLoadIdentity();
82/*     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
83    glMatrixMode(GL_MODELVIEW);
84}
85
86static void Key(unsigned char key, int x, int y)
87{
88
89    switch (key) {
90      case 27:
91	exit(1);
92      default:
93	break;
94    }
95
96    glutPostRedisplay();
97}
98
99static void Draw(void)
100{
101   glClear(GL_COLOR_BUFFER_BIT);
102
103   glBegin(GL_TRIANGLES);
104   glColor3f(0,0,.7);
105   glTexCoord3f(0,0,.7);
106   glVertex3f( 0.9, -0.9, -0.0);
107   glColor3f(.8,0,0);
108   glTexCoord3f(.8,0,0);
109   glVertex3f( 0.9,  0.9, -0.0);
110   glColor3f(0,.9,0);
111   glTexCoord3f(0,.9,0);
112   glVertex3f(-0.9,  0.0, -0.0);
113   glEnd();
114
115   glFlush();
116
117   if (doubleBuffer) {
118      glutSwapBuffers();
119   }
120}
121
122static GLenum Args(int argc, char **argv)
123{
124    GLint i;
125
126    doubleBuffer = GL_FALSE;
127
128    for (i = 1; i < argc; i++) {
129        if (strcmp(argv[i], "-sb") == 0) {
130	    doubleBuffer = GL_FALSE;
131	} else if (strcmp(argv[i], "-db") == 0) {
132	    doubleBuffer = GL_TRUE;
133	} else {
134	    fprintf(stderr, "%s (Bad option).\n", argv[i]);
135	    return GL_FALSE;
136	}
137    }
138    return GL_TRUE;
139}
140
141int main(int argc, char **argv)
142{
143    GLenum type;
144
145    glutInit(&argc, argv);
146
147    if (Args(argc, argv) == GL_FALSE) {
148	exit(1);
149    }
150
151    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
152
153    type = GLUT_RGB | GLUT_ALPHA;
154    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
155    glutInitDisplayMode(type);
156
157    if (glutCreateWindow(*argv) == GL_FALSE) {
158	exit(1);
159    }
160
161    glewInit();
162
163    Init();
164
165    glutReshapeFunc(Reshape);
166    glutKeyboardFunc(Key);
167    glutDisplayFunc(Draw);
168    glutMainLoop();
169	return 0;
170}
171