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 * Based on the trivial/quad-tex-2d program.
26 * Modified by Jakob Bornecrantz <jakob@tungstengraphics.com>
27 */
28
29#include <stdio.h>
30#include <string.h>
31#include <stdlib.h>
32#include <GL/glew.h>
33#include "glut_wrap.h"
34
35static GLenum Target = GL_TEXTURE_2D;
36static GLenum Filter = GL_NEAREST;
37GLenum doubleBuffer;
38static float Rot = 0;
39static int win = 0;
40
41static void Init(void)
42{
43	int internalFormat;
44	int sourceFormat;
45
46	fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
47	fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
48	fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
49
50	glClearColor(0.0, 0.0, 1.0, 0.0);
51
52#define SIZE 16
53	{
54		GLubyte tex2d[SIZE][SIZE][4];
55		GLint s, t;
56
57		for (s = 0; s < SIZE; s++) {
58			for (t = 0; t < SIZE; t++) {
59				tex2d[t][s][0] = 0xff;
60				tex2d[t][s][1] = 0xff;
61				tex2d[t][s][2] = 0xff;
62				tex2d[t][s][3] = 0xff;
63			}
64		}
65
66		internalFormat = GL_LUMINANCE8;
67		sourceFormat = GL_RGBA;
68
69		glTexImage2D(Target,
70			0,
71			internalFormat,
72			SIZE, SIZE,
73			0,
74			sourceFormat,
75			GL_UNSIGNED_BYTE,
76			/* GL_UNSIGNED_INT, */
77			tex2d);
78
79		glEnable(Target);
80		glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
81		glTexParameterf(Target, GL_TEXTURE_WRAP_R, GL_REPEAT);
82		glTexParameterf(Target, GL_TEXTURE_MIN_FILTER, Filter);
83		glTexParameterf(Target, GL_TEXTURE_MAG_FILTER, Filter);
84	}
85}
86
87static void Reshape(int width, int height)
88{
89	glViewport(0, 0, (GLint)width, (GLint)height);
90	glMatrixMode(GL_PROJECTION);
91	glLoadIdentity();
92#if 0
93	glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
94#else
95	glFrustum(-1, 1, -1, 1, 10, 20);
96#endif
97	glMatrixMode(GL_MODELVIEW);
98	glLoadIdentity();
99	glTranslatef(0, 0, -15);
100}
101
102static void Key(unsigned char key, int x, int y)
103{
104	switch (key) {
105	case 'r':
106		Rot += 10.0;
107		break;
108	case 'R':
109		Rot -= 10.0;
110		break;
111	case 27:
112		glutDestroyWindow(win);
113		exit(0);
114	default:
115		return;
116	}
117	glutPostRedisplay();
118}
119
120static void Draw(void)
121{
122	glClear(GL_COLOR_BUFFER_BIT);
123
124	glPushMatrix();
125	glRotatef(Rot, 0, 1, 0);
126
127	glBegin(GL_QUADS);
128	glTexCoord2f(1,0);
129	glVertex3f( 0.9, -0.9, 0.0);
130	glTexCoord2f(1,1);
131	glVertex3f( 0.9,  0.9, 0.0);
132	glTexCoord2f(0,1);
133	glVertex3f(-0.9,  0.9, 0.0);
134	glTexCoord2f(0,0);
135	glVertex3f(-0.9,  -0.9, 0.0);
136	glEnd();
137
138	glPopMatrix();
139
140	glFlush();
141
142	if (doubleBuffer) {
143		glutSwapBuffers();
144	}
145}
146
147static GLenum Args(int argc, char **argv)
148{
149	GLint i;
150
151	doubleBuffer = GL_FALSE;
152
153	for (i = 1; i < argc; i++) {
154		if (strcmp(argv[i], "-sb") == 0) {
155			doubleBuffer = GL_FALSE;
156		} else if (strcmp(argv[i], "-db") == 0) {
157			doubleBuffer = GL_TRUE;
158		} else {
159			fprintf(stderr, "%s (Bad option).\n", argv[i]);
160			return GL_FALSE;
161		}
162	}
163	return GL_TRUE;
164}
165
166int main(int argc, char **argv)
167{
168	GLenum type;
169
170	glutInit(&argc, argv);
171
172	if (Args(argc, argv) == GL_FALSE) {
173		exit(1);
174	}
175
176	glutInitWindowPosition(0, 0);
177	glutInitWindowSize(250, 250);
178
179	type = GLUT_RGB;
180	type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
181	glutInitDisplayMode(type);
182
183	win = glutCreateWindow("Tex test");
184        glewInit();
185	if (!win) {
186		exit(1);
187	}
188
189	Init();
190
191	glutReshapeFunc(Reshape);
192	glutKeyboardFunc(Key);
193	glutDisplayFunc(Draw);
194	glutMainLoop();
195	return 0;
196}
197