Initial revision
diff --git a/progs/demos/winpos.c b/progs/demos/winpos.c
new file mode 100644
index 0000000..a3f931c
--- /dev/null
+++ b/progs/demos/winpos.c
@@ -0,0 +1,128 @@
+/* $Id: winpos.c,v 1.1 1999/08/19 00:55:40 jtg Exp $ */
+
+/*
+ * Example of how to use the GL_MESA_window_pos extension.
+ * Brian Paul This file is in the public domain.
+ */
+
+
+/*
+ * $Log: winpos.c,v $
+ * Revision 1.1 1999/08/19 00:55:40 jtg
+ * Initial revision
+ *
+ * Revision 3.3 1999/03/28 18:24:37 brianp
+ * minor clean-up
+ *
+ * Revision 3.2 1998/11/05 04:34:04 brianp
+ * moved image files to ../images/ directory
+ *
+ * Revision 3.1 1998/02/22 16:36:10 brianp
+ * changed image file and set unpack alignment to 1
+ *
+ * Revision 3.0 1998/02/14 18:42:29 brianp
+ * initial rev
+ *
+ */
+
+
+#include <math.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "GL/glut.h"
+
+#include "../util/readtex.c" /* a hack, I know */
+
+#define IMAGE_FILE "../images/girl.rgb"
+
+
+#ifndef M_PI
+# define M_PI 3.14159265
+#endif
+
+
+
+static GLubyte *Image;
+static int ImgWidth, ImgHeight;
+static GLenum ImgFormat;
+
+
+
+static void draw( void )
+{
+ GLfloat angle;
+ char *extensions;
+
+ extensions = (char *) glGetString( GL_EXTENSIONS );
+ if (strstr( extensions, "GL_MESA_window_pos")==NULL) {
+ printf("Sorry, GL_MESA_window_pos extension not available.\n");
+ return;
+ }
+
+ glClear( GL_COLOR_BUFFER_BIT );
+
+ for (angle = -45.0; angle <= 135.0; angle += 10.0) {
+ GLfloat x = 50.0 + 200.0 * cos( angle * M_PI / 180.0 );
+ GLfloat y = 50.0 + 200.0 * sin( angle * M_PI / 180.0 );
+
+ /* Don't need to worry about the modelview or projection matrices!!! */
+#ifdef GL_MESA_window_pos
+ glWindowPos2fMESA( x, y );
+#endif
+ glDrawPixels( ImgWidth, ImgHeight, ImgFormat, GL_UNSIGNED_BYTE, Image );
+ }
+}
+
+
+
+
+static void key( unsigned char key, int x, int y )
+{
+ (void) x;
+ (void) y;
+ switch (key) {
+ case 27:
+ exit(0);
+ }
+}
+
+
+
+/* new window size or exposure */
+static void reshape( int width, int height )
+{
+ glViewport(0, 0, (GLint)width, (GLint)height);
+}
+
+
+static void init( void )
+{
+ Image = LoadRGBImage( IMAGE_FILE, &ImgWidth, &ImgHeight, &ImgFormat );
+ if (!Image) {
+ printf("Couldn't read %s\n", IMAGE_FILE);
+ exit(0);
+ }
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+ glutInitWindowPosition(0, 0);
+ glutInitWindowSize(500, 500);
+ glutInitDisplayMode( GLUT_RGB );
+
+ if (glutCreateWindow("winpos") <= 0) {
+ exit(0);
+ }
+
+ init();
+
+ glutReshapeFunc( reshape );
+ glutKeyboardFunc( key );
+ glutDisplayFunc( draw );
+ glutMainLoop();
+ return 0;
+}