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xwayland: Return NULL from xwl_window_buffer_get_available 

If there's no available window buffer.

This allows keeping xwl_window_buffer->damage_region empty for a newly
allocated xwl_window_buffer in xwl_window_buffers_get_pixmap, instead
of first populating it in xwl_window_buffer_add_damage_region and then
emptying it again.
This commit is contained in:
Michel Dänzer 2024-01-09 17:10:23 +01:00 committed by Michel Dänzer
parent 6779ec5bf6
commit 777c3e0000
1 changed files with 10 additions and 8 deletions
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18
hw/xwayland/xwayland-window-buffers.c
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@ -140,7 +140,7 @@ static struct xwl_window_buffer *
xwl_window_buffer_get_available(struct xwl_window *xwl_window)
{
if (xorg_list_is_empty(&xwl_window->window_buffers_available))
return xwl_window_buffer_new(xwl_window);
return NULL;
return xorg_list_last_entry(&xwl_window->window_buffers_available,
struct xwl_window_buffer,
@ -341,13 +341,10 @@ xwl_window_buffers_get_pixmap(struct xwl_window *xwl_window,
return window_pixmap;
#endif /* XWL_HAS_GLAMOR */
xwl_window_buffer = xwl_window_buffer_get_available(xwl_window);
if (!xwl_window_buffer)
return window_pixmap;
xwl_window_buffer_add_damage_region(xwl_window, damage_region);
if (xwl_window_buffer->pixmap) {
xwl_window_buffer = xwl_window_buffer_get_available(xwl_window);
if (xwl_window_buffer) {
RegionPtr full_damage = xwl_window_buffer->damage_region;
BoxPtr pBox = RegionRects(full_damage);
int nBox = RegionNumRects(full_damage);
@ -364,10 +361,16 @@ xwl_window_buffers_get_pixmap(struct xwl_window *xwl_window,
pBox++;
}
RegionEmpty(xwl_window_buffer->damage_region);
} else {
xwl_window_buffer = xwl_window_buffer_new(xwl_window);
new_window_pixmap = xwl_window_allocate_pixmap(xwl_window);
if (!new_window_pixmap)
if (!new_window_pixmap) {
xwl_window_buffer_maybe_dispose(xwl_window_buffer);
return window_pixmap;
}
copy_pixmap_area(window_pixmap,
new_window_pixmap,
@ -376,7 +379,6 @@ xwl_window_buffers_get_pixmap(struct xwl_window *xwl_window,
window_pixmap->drawable.height);
}
RegionEmpty(xwl_window_buffer->damage_region);
xwl_window_buffer->pixmap = window_pixmap;
/* Hold a reference on the buffer until it's released by the compositor */