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sdl: improve error message on fatal error 

The SDL_SetVideoMode() error condition is easily triggered by a user by
simply configure a guest with a host unsupported display resolution
and attempting to enable fullscreen.  Since the error is fatal, adding
a bit of debugging help can't harm.

Sample output with this change:

 (qemu) Could not open SDL display (1280x1024x32): No video mode large enough for 1280x1024

The width x height might seem redundant as SDL also provides it in
SDL_GetError(), but I believe there are situations where it is
useful.  I.e. if there is some other SDL error.  Anyway, redundant
information in fatal error messages has never harmed a single gerbil.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Bjørn Mork 2010-03-08 13:07:14 +01:00 committed by Anthony Liguori
parent fd04a2aeda
commit b6034a399e
1 changed files with 2 additions and 1 deletions
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3
sdl.c
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@ -112,7 +112,8 @@ static void do_sdl_resize(int new_width, int new_height, int bpp)
height = new_height;
real_screen = SDL_SetVideoMode(width, height, bpp, flags);
if (!real_screen) {
fprintf(stderr, "Could not open SDL display\n");
fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n", width,
height, bpp, SDL_GetError());
exit(1);
}
}