[PATCH xserver 1/3] xwayland-shm: don't create alpha buffers if the window doesn't have alpha

[Giovanni Campagna]

From: Giovanni Campagna <gcampagn at redhat.com>

If the window is using a 24 bit visual, we must request a buffer
format without alpha, or garbage is rendered.
---
 hw/xfree86/xwayland/xwayland.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/xfree86/xwayland/xwayland.c b/hw/xfree86/xwayland/xwayland.c
index f59bfe4..880b7ec 100644
--- a/hw/xfree86/xwayland/xwayland.c
+++ b/hw/xfree86/xwayland/xwayland.c
@@ -278,7 +278,10 @@ xwl_create_window_buffer_shm(struct xwl_window *xwl_window,
     xwl_window->buffer =  wl_shm_pool_create_buffer(pool, 0,
 			   pixmap->drawable.width,
 			   pixmap->drawable.height,
-			   stride, WL_SHM_FORMAT_ARGB8888);
+			   stride,
+			   pixmap->drawable.depth == 32 ?
+			   WL_SHM_FORMAT_ARGB8888 :
+			   WL_SHM_FORMAT_XRGB8888);
     wl_shm_pool_destroy(pool);
 
     return xwl_window->buffer ? Success : BadDrawable;
-- 
1.8.3.1