From: Keir Fraser <keir.fraser@citrix.com>
Date: Fri, 2 May 2008 12:47:46 +0000 (+0100)
Subject: ioemu: pump SDL events on resize
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14215^2~82
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=b9e99fa85ded716ae54376b3c5f6f78e1a353f03;p=xen.git

ioemu: pump SDL events on resize

When sdl_resize resizes the SDL window, some window manager send back
a ConfigureNotify event, which triggers a SDL_VIDEORESIZE event. That
event, however, is seen only much later, on the next VGA refresh
round. If the guest quickly switches to another resolution in between,
the SDL_VIDEORESIZE event makes us erroneously rescale that new
resolution into the old one.

This patch makes us pump that window manager event, so that no
SDL_VIDEORESIZE event is generated.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
---

diff --git a/tools/ioemu/sdl.c b/tools/ioemu/sdl.c
index 536e9f480f..c70c3cb7ad 100644
--- a/tools/ioemu/sdl.c
+++ b/tools/ioemu/sdl.c
@@ -235,6 +235,9 @@ static void sdl_resize(DisplayState *ds, int w, int h, int linesize)
  again:
     screen = SDL_SetVideoMode(w, h, 0, flags);
 
+    /* Process any WM-generated resize event */
+    SDL_PumpEvents();
+
     if (!screen) {
         fprintf(stderr, "Could not open SDL display: %s\n", SDL_GetError());
         if (opengl_enabled) {