progs/redbook/drawf.c

   1 /*
   2  * Copyright (c) 1993-1997, Silicon Graphics, Inc.
   3  * ALL RIGHTS RESERVED
   4  * Permission to use, copy, modify, and distribute this software for
   5  * any purpose and without fee is hereby granted, provided that the above
   6  * copyright notice appear in all copies and that both the copyright notice
   7  * and this permission notice appear in supporting documentation, and that
   8  * the name of Silicon Graphics, Inc. not be used in advertising
   9  * or publicity pertaining to distribution of the software without specific,
  10  * written prior permission.
  11  *
  12  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
  13  * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
  14  * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
  15  * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
  16  * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
  17  * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
  18  * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
  19  * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
  20  * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
  21  * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
  22  * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
  23  * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
  24  *
  25  * US Government Users Restricted Rights
  26  * Use, duplication, or disclosure by the Government is subject to
  27  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  28  * (c)(1)(ii) of the Rights in Technical Data and Computer Software
  29  * clause at DFARS 252.227-7013 and/or in similar or successor
  30  * clauses in the FAR or the DOD or NASA FAR Supplement.
  31  * Unpublished-- rights reserved under the copyright laws of the
  32  * United States.  Contractor/manufacturer is Silicon Graphics,
  33  * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
  34  *
  35  * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
  36  */
  37
  38 /*
  39  *  drawf.c
  40  *  Draws the bitmapped letter F on the screen (several times).
  41  *  This demonstrates use of the glBitmap() call.
  42  */
  43 #include <GL/glut.h>
  44 #include <stdlib.h>
  45
  46 GLubyte rasters[24] = {
  47    0xc0, 0x00, 0xc0, 0x00, 0xc0, 0x00, 0xc0, 0x00, 0xc0, 0x00,
  48    0xff, 0x00, 0xff, 0x00, 0xc0, 0x00, 0xc0, 0x00, 0xc0, 0x00,
  49    0xff, 0xc0, 0xff, 0xc0};
  50
  51 void init(void)
  52 {
  53    glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
  54    glClearColor (0.0, 0.0, 0.0, 0.0);
  55 }
  56
  57 void display(void)
  58 {
  59    glClear(GL_COLOR_BUFFER_BIT);
  60    glColor3f (1.0, 1.0, 1.0);
  61    glRasterPos2i (20, 20);
  62    glBitmap (10, 12, 0.0, 0.0, 11.0, 0.0, rasters);
  63    glBitmap (10, 12, 0.0, 0.0, 11.0, 0.0, rasters);
  64    glBitmap (10, 12, 0.0, 0.0, 11.0, 0.0, rasters);
  65    glFlush();
  66 }
  67
  68 void reshape(int w, int h)
  69 {
  70    glViewport(0, 0, (GLsizei) w, (GLsizei) h);
  71    glMatrixMode(GL_PROJECTION);
  72    glLoadIdentity();
  73    glOrtho (0, w, 0, h, -1.0, 1.0);
  74    glMatrixMode(GL_MODELVIEW);
  75 }
  76
  77 /* ARGSUSED1 */
  78 void keyboard(unsigned char key, int x, int y)
  79 {
  80    switch (key) {
  81       case 27:
  82          exit(0);
  83    }
  84 }
  85
  86 /*  Main Loop
  87  *  Open window with initial window size, title bar,
  88  *  RGBA display mode, and handle input events.
  89  */
  90 int main(int argc, char** argv)
  91 {
  92    glutInit(&argc, argv);
  93    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
  94    glutInitWindowSize(100, 100);
  95    glutInitWindowPosition(100, 100);
  96    glutCreateWindow(argv[0]);
  97    init();
  98    glutReshapeFunc(reshape);
  99    glutKeyboardFunc(keyboard);
 100    glutDisplayFunc(display);
 101    glutMainLoop();
 102    return 0;
 103 }