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Handle flushing implicit paint while there is a paint outstanding

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If a native window or a window with a native subwindow is moved or resized
then the client window moves and implicit paints need to be flushed since
the native window move will copy/overwrite data. This may happen while there
is an outstanding paint if the move is inside an expose event (weird, but
flash embedded in webkit hit this).

Right now we're asserting here, but the right fix is to allow this but
to not flush the parts that are currently in a (non-implicit) paint. This
means we flush all results from previous not-yet-flushed exposes, but not
the ones being drawn.
This commit is contained in:
Alexander Larsson 2009-05-26 11:30:46 +02:00
parent 7698daf97a
commit 8a689f2e15
1 changed files with 14 additions and 5 deletions
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19
gdk/gdkwindow.c
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@ -2031,7 +2031,8 @@ gdk_window_begin_implicit_paint (GdkWindow *window, GdkRectangle *rect)
}
/* Ensure that all content related to this (sub)window is pushed to the
native region */
native region. If there is an active paint then that area is not
pushed, in order to not show partially finished double buffers. */
static void
gdk_window_flush_implicit_paint (GdkWindow *window)
{
@ -2040,19 +2041,27 @@ gdk_window_flush_implicit_paint (GdkWindow *window)
GdkWindowPaint *paint;
GdkRegion *region;
GdkGC *tmp_gc;
GSList *list;
/* Ensure that there is no explicit paint region. */
g_assert (private->paint_stack == NULL);
impl_window = gdk_window_get_impl_window (private);
if (impl_window->implicit_paint == NULL)
return;
paint = impl_window->implicit_paint;
region = gdk_region_copy (private->clip_region_with_children);
/* Don't flush active double buffers, as that may show partially done
* rendering */
for (list = private->paint_stack; list != NULL; list = list->next)
{
GdkWindowPaint *tmp_paint = list->data;
gdk_region_subtract (region, tmp_paint->region);
}
gdk_region_offset (region, private->abs_x, private->abs_y);
gdk_region_intersect (region, paint->region);
if (!gdk_region_empty (region))
{
/* Some regions are valid, push these to window now */