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_cairo_xcb_surface_ensure_picture: Check fallback

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When an XCB surface's fallback member is not NULL, we did some rendering that
the X server couldn't do for us and thus did that internally in cairo instead.
This means the X drawable's content is out of date and should not be used for
drawing anything.

This adds an assert which checks for that situation.

Signed-off-by: Uli Schlachter <psychon@znc.in>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Uli Schlachter 2010-10-12 21:56:46 +02:00 • committed by Chris Wilson
parent 35b1688c92
commit 5a0f8f7320
1 changed files with 1 additions and 0 deletions
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src/cairo-xcb-surface-render.c
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@ -301,6 +301,7 @@ static void
_cairo_xcb_surface_ensure_picture (cairo_xcb_surface_t *surface)
{
if (surface->picture == XCB_NONE) {
assert (surface->fallback == NULL);
surface->picture = _cairo_xcb_connection_get_xid (surface->connection);
_cairo_xcb_connection_render_create_picture (surface->connection,
surface->picture,