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      "TEMP R1;\n"
45      "MOV  R1, state.material.emission;\n"
46      "MUL  R1, R1, {0.9}.x;\n"
47      "MOV  result.color, R1;\n"
48      "END\n";
49
50
51   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
52   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
53   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
54   fflush(stderr);
55
56   /* Setup the fragment program */
57   glGenProgramsARB(1, &prognum);
58   glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, prognum);
59   glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
60                      strlen(prog1), (const GLubyte *)prog1);
61
62   errnum = glGetError();
63   printf("glGetError = 0x%x\n", errnum);
64   if (errnum != GL_NO_ERROR) {
65      GLint errorpos;
66
67      glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
68      printf("errorpos: %d\n", errorpos);
69      printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
70             (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
71   }
72   glEnable(GL_FRAGMENT_PROGRAM_ARB);
73
74    glClearColor(0.0, 0.0, 1.0, 0.0);
75}
76
77static void Reshape(int width, int height)
78{
79
80    glViewport(0, 0, (GLint)width, (GLint)height);
81
82    glMatrixMode(GL_PROJECTION);
83    glLoadIdentity();
84/*     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
85    glMatrixMode(GL_MODELVIEW);
86}
87
88static void Key(unsigned char key, int x, int y)
89{
90
91    switch (key) {
92      case 27:
93	exit(1);
94      default:
95	break;
96    }
97
98    glutPostRedisplay();
99}
100
101static void Draw(void)
102{
103   glClear(GL_COLOR_BUFFER_BIT);
104
105   glBegin(GL_TRIANGLES);
106   glColor3f(0,0,.7);
107   glTexCoord3f(0,0,.7);
108   glVertex3f( 0.9, -0.9, -0.0);
109   glColor3f(.8,0,0);
110   glTexCoord3f(.8,0,0);
111   glVertex3f( 0.9,  0.9, -0.0);
112   glColor3f(0,.9,0);
113   glTexCoord3f(0,.9,0);
114   glVertex3f(-0.9,  0.0, -0.0);
115   glEnd();
116
117   glFlush();
118
119   if (doubleBuffer) {
120      glutSwapBuffers();
121   }
122}
123
124static GLenum Args(int argc, char **argv)
125{
126    GLint i;
127
128    doubleBuffer = GL_FALSE;
129
130    for (i = 1; i < argc; i++) {
131        if (strcmp(argv[i], "-sb") == 0) {
132	    doubleBuffer = GL_FALSE;
133	} else if (strcmp(argv[i], "-db") == 0) {
134	    doubleBuffer = GL_TRUE;
135	} else {
136	    fprintf(stderr, "%s (Bad option).\n", argv[i]);
137	    return GL_FALSE;
138	}
139    }
140    return GL_TRUE;
141}
142
143int main(int argc, char **argv)
144{
145    GLenum type;
146
147    glutInit(&argc, argv);
148
149    if (Args(argc, argv) == GL_FALSE) {
150	exit(1);
151    }
152
153    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
154
155    type = GLUT_RGB | GLUT_ALPHA;
156    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
157    glutInitDisplayMode(type);
158
159    if (glutCreateWindow(*argv) == GL_FALSE) {
160	exit(1);
161    }
162
163    glewInit();
164
165    Init();
166
167    glutReshapeFunc(Reshape);
168    glutKeyboardFunc(Key);
169    glutDisplayFunc(Draw);
170    glutMainLoop();
171	return 0;
172}
173