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sdl2: Support all virtio-gpu formats

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There are some 2D resource formats that can be used through virtio-gpu,
but which are not supported by SDL2 when used for a scanout; these are
all alpha-channel formats and also XBGR (RGBX in non-BE pixman).

Add these formats in the switch converting pixman to SDL format
constants so a guest cannot crash the VM by triggering the
g_assert_not_reached() with an unsupported format.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20181008185013.19371-1-mreitz@redhat.com

[ kraxel: also update sdl2_2d_check_format() ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Max Reitz 2018-10-08 20:50:13 +02:00 committed by Gerd Hoffmann
parent 6415994ffc
commit 1abcfe9e29
1 changed files with 15 additions and 0 deletions
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15
ui/sdl2-2d.c
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@ -101,15 +101,24 @@ void sdl2_2d_switch(DisplayChangeListener *dcl,
case PIXMAN_r5g6b5:
format = SDL_PIXELFORMAT_RGB565;
break;
case PIXMAN_a8r8g8b8:
case PIXMAN_x8r8g8b8:
format = SDL_PIXELFORMAT_ARGB8888;
break;
case PIXMAN_a8b8g8r8:
case PIXMAN_x8b8g8r8:
format = SDL_PIXELFORMAT_ABGR8888;
break;
case PIXMAN_r8g8b8a8:
case PIXMAN_r8g8b8x8:
format = SDL_PIXELFORMAT_RGBA8888;
break;
case PIXMAN_b8g8r8x8:
format = SDL_PIXELFORMAT_BGRX8888;
break;
case PIXMAN_b8g8r8a8:
format = SDL_PIXELFORMAT_BGRA8888;
break;
default:
g_assert_not_reached();
}
@ -149,7 +158,13 @@ bool sdl2_2d_check_format(DisplayChangeListener *dcl,
* the native ones. Thes are the ones I have tested.
*/
return (format == PIXMAN_x8r8g8b8 ||
format == PIXMAN_a8r8g8b8 ||
format == PIXMAN_a8b8g8r8 ||
format == PIXMAN_x8b8g8r8 ||
format == PIXMAN_b8g8r8x8 ||
format == PIXMAN_b8g8r8a8 ||
format == PIXMAN_r8g8b8x8 ||
format == PIXMAN_r8g8b8a8 ||
format == PIXMAN_x1r5g5b5 ||
format == PIXMAN_r5g6b5);
}