Squashed 'nx-X11/extras/Mesa_6.4.2/' content from commit 475b1f7

git-subtree-dir: nx-X11/extras/Mesa_6.4.2
git-subtree-split: 475b1f7b56fa36ef4f3b22a749f88a98ddc0d502

1 files changed, 159 insertions, 0 deletions

diff --git a/progs/redbook/image.c b/progs/redbook/image.c
new file mode 100644
index 000000000..dc1a7246e
--- /dev/null
+++ b/progs/redbook/image.c
@@ -0,0 +1,159 @@
+/*
+ * 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+ * Unpublished-- rights reserved under the copyright laws of the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;
+
+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;
+      }
+   }
+}
+
+void init(void)
+{    
+   glClearColor (0.0, 0.0, 0.0, 0.0);
+   glShadeModel(GL_FLAT);
+   makeCheckImage();
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+}
+
+void display(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT);
+   glRasterPos2i(0, 0);
+   glDrawPixels(checkImageWidth, checkImageHeight, GL_RGB, 
+                GL_UNSIGNED_BYTE, checkImage);
+   glFlush();
+}
+
+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();
+}
+
+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 */
+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; 
+}