Commit 136a8d9d authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

sdl2: stop flickering 



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

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: default avatarMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
parent c046d828

ui/sdl2-2d.c

+13 −0
Original line number Diff line number Diff line
@@ -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));