Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 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/glut.h> |
| 29 | |
| 30 | |
| 31 | #define CI_OFFSET_1 16 |
| 32 | #define CI_OFFSET_2 32 |
| 33 | |
| 34 | GLint Width = 250, Height = 250; |
| 35 | |
| 36 | GLenum doubleBuffer; |
| 37 | |
| 38 | static void Init(void) |
| 39 | { |
| 40 | fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); |
| 41 | fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); |
| 42 | fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); |
Keith Whitwell | eb9801c | 2009-03-24 16:35:29 +0000 | [diff] [blame] | 43 | fflush(stderr); |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 44 | |
| 45 | glClearColor(0.0, 0.0, 1.0, 0.0); |
Jakob Bornecrantz | b677905 | 2009-02-13 23:03:57 +0100 | [diff] [blame] | 46 | |
| 47 | glEnable(GL_FOG); |
| 48 | glFogi(GL_FOG_MODE, GL_LINEAR); |
| 49 | glFogf(GL_FOG_START, 25); |
| 50 | glFogf(GL_FOG_END, 35); |
| 51 | #if 0 |
| 52 | glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
| 53 | glEnable (GL_BLEND); |
| 54 | #endif |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | static void Reshape(int width, int height) |
| 58 | { |
| 59 | |
| 60 | glViewport(0, 0, (GLint)width, (GLint)height); |
| 61 | |
| 62 | glMatrixMode(GL_PROJECTION); |
| 63 | glLoadIdentity(); |
| 64 | glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); |
| 65 | glMatrixMode(GL_MODELVIEW); |
| 66 | } |
| 67 | |
| 68 | static void Key(unsigned char key, int x, int y) |
| 69 | { |
| 70 | |
| 71 | switch (key) { |
| 72 | case 27: |
| 73 | exit(1); |
| 74 | default: |
| 75 | return; |
| 76 | } |
| 77 | |
| 78 | glutPostRedisplay(); |
| 79 | } |
| 80 | |
| 81 | static void Draw(void) |
| 82 | { |
Jakob Bornecrantz | b677905 | 2009-02-13 23:03:57 +0100 | [diff] [blame] | 83 | glClear(GL_COLOR_BUFFER_BIT); |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 84 | |
| 85 | glEnable(GL_FOG); |
| 86 | |
| 87 | glBegin(GL_TRIANGLES); |
Jakob Bornecrantz | b677905 | 2009-02-13 23:03:57 +0100 | [diff] [blame] | 88 | glColor3f(1,1,1); |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 89 | glVertex3f( 0.9, -0.9, -30.0); |
Jakob Bornecrantz | b677905 | 2009-02-13 23:03:57 +0100 | [diff] [blame] | 90 | glColor3f(1,1,1); |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 91 | glVertex3f( 0.9, 0.9, -30.0); |
Jakob Bornecrantz | b677905 | 2009-02-13 23:03:57 +0100 | [diff] [blame] | 92 | glColor3f(1,1,1); |
| 93 | glVertex3f(-0.9, 0.0, -40.0); |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 94 | glEnd(); |
| 95 | |
| 96 | #if 0 |
| 97 | glBegin(GL_TRIANGLES); |
Jakob Bornecrantz | b677905 | 2009-02-13 23:03:57 +0100 | [diff] [blame] | 98 | glColor3f(0,0,.7); |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 99 | glVertex3f(-0.9, -0.9, -30.0); |
Jakob Bornecrantz | b677905 | 2009-02-13 23:03:57 +0100 | [diff] [blame] | 100 | glColor3f(.8,0,0); |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 101 | glVertex3f(-0.9, 0.9, -30.0); |
Jakob Bornecrantz | b677905 | 2009-02-13 23:03:57 +0100 | [diff] [blame] | 102 | glColor3f(0,.9,0); |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 103 | glVertex3f( 0.9, 0.0, -30.0); |
| 104 | glEnd(); |
| 105 | #endif |
| 106 | |
| 107 | glDisable(GL_FOG); |
| 108 | |
| 109 | glFlush(); |
| 110 | |
| 111 | if (doubleBuffer) { |
| 112 | glutSwapBuffers(); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | static GLenum Args(int argc, char **argv) |
| 117 | { |
| 118 | GLint i; |
| 119 | |
| 120 | doubleBuffer = GL_FALSE; |
| 121 | |
| 122 | for (i = 1; i < argc; i++) { |
| 123 | if (strcmp(argv[i], "-sb") == 0) { |
| 124 | doubleBuffer = GL_FALSE; |
| 125 | } else if (strcmp(argv[i], "-db") == 0) { |
| 126 | doubleBuffer = GL_TRUE; |
| 127 | } else { |
| 128 | fprintf(stderr, "%s (Bad option).\n", argv[i]); |
| 129 | return GL_FALSE; |
| 130 | } |
| 131 | } |
| 132 | return GL_TRUE; |
| 133 | } |
| 134 | |
| 135 | int main(int argc, char **argv) |
| 136 | { |
| 137 | GLenum type; |
| 138 | |
| 139 | glutInit(&argc, argv); |
| 140 | |
| 141 | if (Args(argc, argv) == GL_FALSE) { |
| 142 | exit(1); |
| 143 | } |
| 144 | |
| 145 | glutInitWindowPosition(100, 0); glutInitWindowSize(Width, Height); |
| 146 | |
| 147 | type = GLUT_RGB; |
| 148 | type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; |
| 149 | glutInitDisplayMode(type); |
| 150 | |
Keith Whitwell | defd52f | 2009-02-18 18:20:50 +0000 | [diff] [blame] | 151 | if (glutCreateWindow(*argv) == GL_FALSE) { |
Keith Whitwell | b1399a5 | 2007-11-25 15:06:54 +0000 | [diff] [blame] | 152 | exit(1); |
| 153 | } |
| 154 | |
| 155 | Init(); |
| 156 | |
| 157 | glutReshapeFunc(Reshape); |
| 158 | glutKeyboardFunc(Key); |
| 159 | glutDisplayFunc(Draw); |
| 160 | glutMainLoop(); |
| 161 | return 0; |
| 162 | } |