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authorGerd Hoffmann <kraxel@redhat.com>2015-06-12 12:16:02 +0200
committerGerd Hoffmann <kraxel@redhat.com>2015-10-08 10:31:35 +0200
commit136a8d9d444560f71fca89f27475cfeaffa19cf3 (patch)
tree48d4514676d06dced7511497d8a64935709a3149 /ui/sdl2-2d.c
parentc046d8284474a0f7763dea849433bde37a69023d (diff)
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sdl2: stop flickering
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>
Diffstat (limited to 'ui/sdl2-2d.c')
-rw-r--r--ui/sdl2-2d.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/ui/sdl2-2d.c b/ui/sdl2-2d.c
index d0b340f..191ee3b 100644
--- a/ui/sdl2-2d.c
+++ b/ui/sdl2-2d.c
@@ -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));