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Diffstat (limited to 'progs/redbook/image.c')
| -rw-r--r-- | progs/redbook/image.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/progs/redbook/image.c b/progs/redbook/image.c deleted file mode 100644 index fa3b46f5ed..0000000000 --- a/progs/redbook/image.c +++ /dev/null @@ -1,159 +0,0 @@ -/* - * Copyright (c) 1993-1997, Silicon Graphics, Inc. - * ALL RIGHTS RESERVED - * Permission to use, copy, modify, and distribute this software for - * any purpose and without fee is hereby granted, provided that the above - * copyright notice appear in all copies and that both the copyright notice - * and this permission notice appear in supporting documentation, and that - * the name of Silicon Graphics, Inc. not be used in advertising - * or publicity pertaining to distribution of the software without specific, - * written prior permission. - * - * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" - * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, - * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR - * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON - * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, - * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY - * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, - * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF - * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN - * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE - * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE. - * - * US Government Users Restricted Rights - * Use, duplication, or disclosure by the Government is subject to - * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph - * (c)(1)(ii) of the Rights in Technical Data and Computer Software - * clause at DFARS 252.227-7013 and/or in similar or successor - * clauses in the FAR or the DOD or NASA FAR Supplement. - * Unpublished-- rights reserved under the copyright laws of the - * United States. Contractor/manufacturer is Silicon Graphics, - * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311. - * - * OpenGL(R) is a registered trademark of Silicon Graphics, Inc. - */ - -/* image.c - * This program demonstrates drawing pixels and shows the effect - * of glDrawPixels(), glCopyPixels(), and glPixelZoom(). - * Interaction: moving the mouse while pressing the mouse button - * will copy the image in the lower-left corner of the window - * to the mouse position, using the current pixel zoom factors. - * There is no attempt to prevent you from drawing over the original - * image. If you press the 'r' key, the original image and zoom - * factors are reset. If you press the 'z' or 'Z' keys, you change - * the zoom factors. - */ -#include <GL/glut.h> -#include <stdlib.h> -#include <stdio.h> - -/* Create checkerboard image */ -#define checkImageWidth 64 -#define checkImageHeight 64 -GLubyte checkImage[checkImageHeight][checkImageWidth][3]; - -static GLdouble zoomFactor = 1.0; -static GLint height; - -static void makeCheckImage(void) -{ - int i, j, c; - - for (i = 0; i < checkImageHeight; i++) { - for (j = 0; j < checkImageWidth; j++) { - c = (((i&0x8)==0)^((j&0x8)==0))*255; - checkImage[i][j][0] = (GLubyte) c; - checkImage[i][j][1] = (GLubyte) c; - checkImage[i][j][2] = (GLubyte) c; - } - } -} - -static void init(void) -{ - glClearColor (0.0, 0.0, 0.0, 0.0); - glShadeModel(GL_FLAT); - makeCheckImage(); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); -} - -static void display(void) -{ - glClear(GL_COLOR_BUFFER_BIT); - glRasterPos2i(0, 0); - glDrawPixels(checkImageWidth, checkImageHeight, GL_RGB, - GL_UNSIGNED_BYTE, checkImage); - glFlush(); -} - -static void reshape(int w, int h) -{ - glViewport(0, 0, (GLsizei) w, (GLsizei) h); - height = (GLint) h; - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluOrtho2D(0.0, (GLdouble) w, 0.0, (GLdouble) h); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); -} - -static void motion(int x, int y) -{ - static GLint screeny; - - screeny = height - (GLint) y; - glRasterPos2i (x, screeny); - glPixelZoom (zoomFactor, zoomFactor); - glCopyPixels (0, 0, checkImageWidth, checkImageHeight, GL_COLOR); - glPixelZoom (1.0, 1.0); - glFlush (); -} - -/* ARGSUSED1 */ -static void keyboard(unsigned char key, int x, int y) -{ - switch (key) { - case 'r': - case 'R': - zoomFactor = 1.0; - glutPostRedisplay(); - printf ("zoomFactor reset to 1.0\n"); - break; - case 'z': - zoomFactor += 0.5; - if (zoomFactor >= 3.0) - zoomFactor = 3.0; - printf ("zoomFactor is now %4.1f\n", zoomFactor); - break; - case 'Z': - zoomFactor -= 0.5; - if (zoomFactor <= 0.5) - zoomFactor = 0.5; - printf ("zoomFactor is now %4.1f\n", zoomFactor); - break; - case 27: - exit(0); - break; - default: - break; - } -} - -int main(int argc, char** argv) -{ - glutInit(&argc, argv); - glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); - glutInitWindowSize(250, 250); - glutInitWindowPosition(100, 100); - glutCreateWindow(argv[0]); - init(); - glutDisplayFunc(display); - glutReshapeFunc(reshape); - glutKeyboardFunc(keyboard); - glutMotionFunc(motion); - glutMainLoop(); - return 0; -} |