[libvirt] [PULL 04/12] sdl2: redraw correctly when scanout_mode enabled.

From: Tao Wu <lepton(a)google.com&gt; When scanout_mode enabled, surface is out of sync with actual screen. In such case, we just call sdl2_gl_scanout_flush to do redraw. This fixes bug reported in https://lists.freedesktop.org/archives/virglrenderer-devel/2018-July/0013... Signed-off-by: Tao Wu <lepton(a)google.com&gt; Message-id: 20180726225900.180698-1-lepton(a)google.com Signed-off-by: Gerd Hoffmann <kraxel(a)redhat.com&gt; --- ui/sdl2-gl.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c index 83b71853d1..1bf4542d8d 100644 --- a/ui/sdl2-gl.c +++ b/ui/sdl2-gl.c @@ -124,6 +124,11 @@ void sdl2_gl_redraw(struct sdl2_console *scon) { assert(scon->opengl); + if (scon->scanout_mode) { + /* sdl2_gl_scanout_flush actually only care about + * the first argument. */ + return sdl2_gl_scanout_flush(&scon->dcl, 0, 0, 0, 0); + } if (scon->surface) { sdl2_gl_render_surface(scon); } -- 2.9.3