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-rw-r--r--progs/xdemos/wincopy.c48
1 files changed, 41 insertions, 7 deletions
diff --git a/progs/xdemos/wincopy.c b/progs/xdemos/wincopy.c
index 39d471a5e5..3093553d5d 100644
--- a/progs/xdemos/wincopy.c
+++ b/progs/xdemos/wincopy.c
@@ -1,9 +1,8 @@
-
/*
* Mesa 3-D graphics library
- * Version: 3.3
+ * Version: 5.1
*
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -36,6 +35,7 @@
#include <GL/gl.h>
#include <GL/glx.h>
+#include <X11/keysym.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
@@ -52,6 +52,8 @@ static GLint Width[2], Height[2];
static GLfloat Angle = 0.0;
+static GLboolean DrawFront = GL_FALSE;
+
static Window
@@ -104,6 +106,15 @@ Redraw(void)
Angle += 1.0;
+ if (DrawFront) {
+ glDrawBuffer(GL_FRONT);
+ glReadBuffer(GL_FRONT);
+ }
+ else {
+ glDrawBuffer(GL_BACK);
+ glReadBuffer(GL_BACK);
+ }
+
glViewport(0, 0, Width[0], Height[0]);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
@@ -126,7 +137,10 @@ Redraw(void)
glEnd();
glPopMatrix();
- glXSwapBuffers(Dpy, Win[0]);
+ if (DrawFront)
+ glFinish();
+ else
+ glXSwapBuffers(Dpy, Win[0]);
/* copy image from window 0 to window 1 */
@@ -146,13 +160,16 @@ Redraw(void)
glRasterPos2f(-1, -1);
/* copy the image between windows */
- glDrawBuffer(GL_FRONT);
glCopyPixels(0, 0, Width[0], Height[0], GL_COLOR);
- glDrawBuffer(GL_BACK);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
+
+ if (DrawFront)
+ glFinish();
+ else
+ glXSwapBuffers(Dpy, Win[1]);
}
@@ -192,7 +209,22 @@ EventLoop(void)
Resize(event.xany.window, event.xconfigure.width, event.xconfigure.height);
break;
case KeyPress:
- return;
+ {
+ char buf[100];
+ KeySym keySym;
+ XComposeStatus stat;
+ XLookupString(&event.xkey, buf, sizeof(buf), &keySym, &stat);
+ if (keySym == XK_Escape) {
+ /* exit */
+ return;
+ }
+ else if (buf[0] == 'f') {
+ DrawFront = !DrawFront;
+ printf("Drawing to %s buffer\n",
+ DrawFront ? "GL_FRONT" : "GL_BACK");
+ }
+ }
+ break;
default:
/*no-op*/ ;
}
@@ -243,6 +275,8 @@ Init(void)
Win[1] = CreateWindow(Dpy, ScrNum, visinfo,
350, 0, 300, 300, "dest window");
+ printf("Press Esc to exit\n");
+ printf("Press 'f' to toggle front/back buffer drawing\n");
}