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sdl: Reverse support for video mode setting

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Currently, If the setting of video mode failed, qemu will exit. It
should go back to the previous setting if the new screen resolution
failed. This patch fixes LP#1216368, add support to revert to existing
surface for the failure of video mode setting.

Reported-by: Sascha Krissler <sascha@srlabs.de>
Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1378285636-7091-1-git-send-email-lilei@linux.vnet.ibm.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
This commit is contained in:
Lei Li 2013-09-04 17:07:16 +08:00 committed by Anthony Liguori
parent 5f3e31012e
commit 898ae2846d
1 changed files with 19 additions and 4 deletions
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23
ui/sdl.c
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@ -86,6 +86,7 @@ static void sdl_update(DisplayChangeListener *dcl,
static void do_sdl_resize(int width, int height, int bpp)
{
int flags;
SDL_Surface *tmp_screen;
// printf("resizing to %d %d\n", w, h);
@ -98,12 +99,26 @@ static void do_sdl_resize(int width, int height, int bpp)
if (gui_noframe)
flags |= SDL_NOFRAME;
real_screen = SDL_SetVideoMode(width, height, bpp, flags);
tmp_screen = SDL_SetVideoMode(width, height, bpp, flags);
if (!real_screen) {
fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n", width,
height, bpp, SDL_GetError());
exit(1);
if (!tmp_screen) {
fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n",
width, height, bpp, SDL_GetError());
exit(1);
}
} else {
/*
* Revert to the previous video mode if the change of resizing or
* resolution failed.
*/
if (!tmp_screen) {
fprintf(stderr, "Failed to set SDL display (%dx%dx%d): %s\n",
width, height, bpp, SDL_GetError());
return;
}
}
real_screen = tmp_screen;
}
static void sdl_switch(DisplayChangeListener *dcl,