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gdk: Add gdk_window_has_alpha helper

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This centralizes the current checks for has_alpha_bg, which
lets us extend the check later.

https://bugzilla.gnome.org/show_bug.cgi?id=687842
This commit is contained in:
Alexander Larsson 2012-11-07 12:57:38 +01:00
parent c94002f8c0
commit 8a40d8fe2a
1 changed files with 13 additions and 7 deletions
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20
gdk/gdkwindow.c
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@ -668,6 +668,13 @@ gdk_window_has_no_impl (GdkWindow *window)
return window->impl_window != window;
}
static gboolean
gdk_window_has_alpha (GdkWindow *window)
{
return !gdk_window_has_impl (window) &&
window->has_alpha_background;
}
static void
remove_layered_child_area (GdkWindow *window,
cairo_region_t *region)
@ -695,7 +702,7 @@ remove_layered_child_area (GdkWindow *window,
continue;
/* Only non-impl children with alpha add to the layered region */
if (!child->has_alpha_background && gdk_window_has_impl (child))
if (!gdk_window_has_alpha (child))
continue;
r.x = child->x;
@ -797,7 +804,7 @@ remove_child_area (GdkWindow *window,
}
}
if (child->has_alpha_background)
if (gdk_window_has_alpha (child))
{
if (layered_region != NULL)
cairo_region_union (layered_region, child_region);
@ -2989,8 +2996,7 @@ gdk_window_begin_paint_region (GdkWindow *window,
by being drawn in back to front order. However, if implicit paints are not used, for
instance if it was flushed due to a non-double-buffered paint in the middle of the
expose we need to copy in the existing data here. */
if (!gdk_window_has_impl (window) &&
window->has_alpha_background &&
if (gdk_window_has_alpha (window) &&
(!implicit_paint ||
(implicit_paint && implicit_paint->flushed != NULL && !cairo_region_is_empty (implicit_paint->flushed))))
{
@ -6161,7 +6167,7 @@ gdk_window_move_resize_internal (GdkWindow *window,
* Everything in the old and new regions that is not copied must be
* invalidated (including children) as this is newly exposed
*/
if (window->has_alpha_background)
if (gdk_window_has_alpha (window))
copy_area = cairo_region_create (); /* Copy nothing for alpha windows */
else
copy_area = cairo_region_copy (new_region);
@ -6385,7 +6391,7 @@ gdk_window_scroll (GdkWindow *window,
impl_window = gdk_window_get_impl_window (window);
/* Calculate the area that can be gotten by copying the old area */
if (window->has_alpha_background)
if (gdk_window_has_alpha (window))
copy_area = cairo_region_create (); /* Copy nothing for alpha windows */
else
copy_area = cairo_region_copy (window->clip_region);
@ -6473,7 +6479,7 @@ gdk_window_move_region (GdkWindow *window,
impl_window = gdk_window_get_impl_window (window);
/* compute source regions */
if (window->has_alpha_background)
if (gdk_window_has_alpha (window))
copy_area = cairo_region_create (); /* Copy nothing for alpha windows */
else
copy_area = cairo_region_copy (region);