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generic damage generation for offscreen windows

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Generating damage from gdk drawing api doesn't help for cairo rendering
...and the gdk drawing api is gone anyway. Bug 621571
This commit is contained in:
Matthias Clasen 2010-08-04 18:43:53 -04:00 committed by Benjamin Otte
parent 7fd148fc59
commit 075661d376
2 changed files with 4 additions and 39 deletions
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39
gdk/gdkoffscreenwindow.c
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@ -209,45 +209,6 @@ gdk_offscreen_window_get_visual (GdkDrawable *drawable)
return gdk_drawable_get_visual (offscreen->wrapper);
}
static void
add_damage (GdkOffscreenWindow *offscreen,
int x, int y,
int w, int h,
gboolean is_line)
{
GdkRectangle rect;
cairo_region_t *damage;
rect.x = x;
rect.y = y;
rect.width = w;
rect.height = h;
if (is_line)
{
/* This should really take into account line width, line
* joins (and miter) and line caps. But these are hard
* to compute, rarely used and generally a pain. And in
* the end a snug damage rectangle is not that important
* as multiple damages are generally created anyway.
*
* So, we just add some padding around the rect.
* We use a padding of 3 pixels, plus an extra row
* below and on the right for the normal line size. I.E.
* line from (0,0) to (2,0) gets h=0 but is really
* at least one pixel tall.
*/
rect.x -= 3;
rect.y -= 3;
rect.width += 7;
rect.height += 7;
}
damage = cairo_region_create_rectangle (&rect);
_gdk_window_add_damage (offscreen->wrapper, damage);
cairo_region_destroy (damage);
}
void
_gdk_offscreen_window_new (GdkWindow *window,
GdkScreen *screen,

4
gdk/gdkwindow.c
View File

@ -4305,6 +4305,10 @@ _gdk_window_process_updates_recurse (GdkWindow *window,
if (cairo_region_is_empty (expose_region))
return;
if (gdk_window_is_offscreen (private->impl_window) &&
private == private->impl_window)
_gdk_window_add_damage ((GdkWindow *) private->impl_window, expose_region);
/* Make this reentrancy safe for expose handlers freeing windows */
children = g_list_copy (private->children);
g_list_foreach (children, (GFunc)g_object_ref, NULL);