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sdl2: stop flickering

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Optimizing updates by copying the dirty rectangle
only do not work because of double-buffering.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Gerd Hoffmann 2015-06-12 12:16:02 +02:00
parent c046d82844
commit 136a8d9d44
1 changed files with 13 additions and 0 deletions
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13
ui/sdl2-2d.c
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@ -45,10 +45,23 @@ void sdl2_2d_update(DisplayChangeListener *dcl,
return;
}
/*
* SDL2 seems to do some double-buffering, and trying to only
* update the changed areas results in only one of the two buffers
* being updated. Which flickers alot. So lets not try to be
* clever do a full update every time ...
*/
#if 0
rect.x = x;
rect.y = y;
rect.w = w;
rect.h = h;
#else
rect.x = 0;
rect.y = 0;
rect.w = surface_width(surf);
rect.h = surface_height(surf);
#endif
SDL_UpdateTexture(scon->texture, NULL, surface_data(surf),
surface_stride(surf));