gtk/gdk/x11/gdkgeometry-x11.c
Alexander Larsson 939e55223c Ensure that queue_translation is paired with the right X operation
The X11 queue_translation operation uses NextRequest to get the serial
of the XCopyArea operation where the translation should end. However,
if the gc passed to gdk_draw_drawable has a non-flushed clip region
(which it commonly has now for the window clipping) then the next
operation will be the GC flush, not the XCopyArea.

To handle this right we now pass in the GC to be used to
queue_translation and ensure that it is flushed before calling
NextRequest().
2009-08-13 14:46:02 +02:00

329 lines
8.5 KiB
C

/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gdk.h" /* For gdk_rectangle_intersect */
#include "gdkprivate-x11.h"
#include "gdkx.h"
#include "gdkregion.h"
#include "gdkinternals.h"
#include "gdkscreen-x11.h"
#include "gdkdisplay-x11.h"
#include "gdkwindow-x11.h"
#include "gdkalias.h"
typedef struct _GdkWindowQueueItem GdkWindowQueueItem;
typedef struct _GdkWindowParentPos GdkWindowParentPos;
typedef enum {
GDK_WINDOW_QUEUE_TRANSLATE,
GDK_WINDOW_QUEUE_ANTIEXPOSE
} GdkWindowQueueType;
struct _GdkWindowQueueItem
{
GdkWindow *window;
gulong serial;
GdkWindowQueueType type;
union {
struct {
GdkRegion *area;
gint dx;
gint dy;
} translate;
struct {
GdkRegion *area;
} antiexpose;
} u;
};
void
_gdk_window_move_resize_child (GdkWindow *window,
gint x,
gint y,
gint width,
gint height)
{
GdkWindowImplX11 *impl;
GdkWindowObject *obj;
g_return_if_fail (window != NULL);
g_return_if_fail (GDK_IS_WINDOW (window));
impl = GDK_WINDOW_IMPL_X11 (GDK_WINDOW_OBJECT (window)->impl);
obj = GDK_WINDOW_OBJECT (window);
if (width > 65535 ||
height > 65535)
{
g_warning ("Native children wider or taller than 65535 pixels are not supported");
if (width > 65535)
width = 65535;
if (height > 65535)
height = 65535;
}
obj->x = x;
obj->y = y;
obj->width = width;
obj->height = height;
/* We don't really care about origin overflow, because on overflow
the window won't be visible anyway and thus it will be shaped
to nothing */
_gdk_x11_window_tmp_unset_parent_bg (window);
_gdk_x11_window_tmp_unset_bg (window, TRUE);
XMoveResizeWindow (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
obj->x + obj->parent->abs_x,
obj->y + obj->parent->abs_y,
width, height);
_gdk_x11_window_tmp_reset_parent_bg (window);
_gdk_x11_window_tmp_reset_bg (window, TRUE);
}
static Bool
expose_serial_predicate (Display *xdisplay,
XEvent *xev,
XPointer arg)
{
gulong *serial = (gulong *)arg;
if (xev->xany.type == Expose || xev->xany.type == GraphicsExpose)
*serial = MIN (*serial, xev->xany.serial);
return False;
}
/* Find oldest possible serial for an outstanding expose event
*/
static gulong
find_current_serial (Display *xdisplay)
{
XEvent xev;
gulong serial = NextRequest (xdisplay);
XSync (xdisplay, False);
XCheckIfEvent (xdisplay, &xev, expose_serial_predicate, (XPointer)&serial);
return serial;
}
static void
queue_delete_link (GQueue *queue,
GList *link)
{
if (queue->tail == link)
queue->tail = link->prev;
queue->head = g_list_remove_link (queue->head, link);
g_list_free_1 (link);
queue->length--;
}
static void
queue_item_free (GdkWindowQueueItem *item)
{
if (item->window)
{
g_object_remove_weak_pointer (G_OBJECT (item->window),
(gpointer *)&(item->window));
}
if (item->type == GDK_WINDOW_QUEUE_ANTIEXPOSE)
gdk_region_destroy (item->u.antiexpose.area);
else
{
if (item->u.translate.area)
gdk_region_destroy (item->u.translate.area);
}
g_free (item);
}
static void
gdk_window_queue (GdkWindow *window,
GdkWindowQueueItem *item)
{
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_WINDOW_DISPLAY (window));
if (!display_x11->translate_queue)
display_x11->translate_queue = g_queue_new ();
/* Keep length of queue finite by, if it grows too long,
* figuring out the latest relevant serial and discarding
* irrelevant queue items.
*/
if (display_x11->translate_queue->length >= 64)
{
gulong serial = find_current_serial (GDK_WINDOW_XDISPLAY (window));
GList *tmp_list = display_x11->translate_queue->head;
while (tmp_list)
{
GdkWindowQueueItem *item = tmp_list->data;
GList *next = tmp_list->next;
/* an overflow-safe (item->serial < serial) */
if (item->serial - serial > (gulong) G_MAXLONG)
{
queue_delete_link (display_x11->translate_queue, tmp_list);
queue_item_free (item);
}
tmp_list = next;
}
}
/* Catch the case where someone isn't processing events and there
* is an event stuck in the event queue with an old serial:
* If we can't reduce the queue length by the above method,
* discard anti-expose items. (We can't discard translate
* items
*/
if (display_x11->translate_queue->length >= 64)
{
GList *tmp_list = display_x11->translate_queue->head;
while (tmp_list)
{
GdkWindowQueueItem *item = tmp_list->data;
GList *next = tmp_list->next;
if (item->type == GDK_WINDOW_QUEUE_ANTIEXPOSE)
{
queue_delete_link (display_x11->translate_queue, tmp_list);
queue_item_free (item);
}
tmp_list = next;
}
}
item->window = window;
item->serial = NextRequest (GDK_WINDOW_XDISPLAY (window));
g_object_add_weak_pointer (G_OBJECT (window),
(gpointer *)&(item->window));
g_queue_push_tail (display_x11->translate_queue, item);
}
void
_gdk_x11_window_queue_translation (GdkWindow *window,
GdkGC *gc,
GdkRegion *area,
gint dx,
gint dy)
{
GdkWindowQueueItem *item = g_new (GdkWindowQueueItem, 1);
item->type = GDK_WINDOW_QUEUE_TRANSLATE;
item->u.translate.area = area ? gdk_region_copy (area) : NULL;
item->u.translate.dx = dx;
item->u.translate.dy = dy;
/* Ensure that the gc is flushed so that we get the right
serial from NextRequest in gdk_window_queue, i.e. the
the serial for the XCopyArea, not the ones from flushing
the gc. */
_gdk_x11_gc_flush (gc);
gdk_window_queue (window, item);
}
gboolean
_gdk_x11_window_queue_antiexpose (GdkWindow *window,
GdkRegion *area)
{
GdkWindowQueueItem *item = g_new (GdkWindowQueueItem, 1);
item->type = GDK_WINDOW_QUEUE_ANTIEXPOSE;
item->u.antiexpose.area = area;
gdk_window_queue (window, item);
return TRUE;
}
void
_gdk_window_process_expose (GdkWindow *window,
gulong serial,
GdkRectangle *area)
{
GdkWindowImplX11 *impl;
GdkRegion *invalidate_region = gdk_region_rectangle (area);
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_WINDOW_DISPLAY (window));
impl = GDK_WINDOW_IMPL_X11 (GDK_WINDOW_OBJECT (window)->impl);
if (display_x11->translate_queue)
{
GList *tmp_list = display_x11->translate_queue->head;
while (tmp_list)
{
GdkWindowQueueItem *item = tmp_list->data;
GList *next = tmp_list->next;
/* an overflow-safe (serial < item->serial) */
if (serial - item->serial > (gulong) G_MAXLONG)
{
if (item->window == window)
{
if (item->type == GDK_WINDOW_QUEUE_TRANSLATE)
{
if (item->u.translate.area)
{
GdkRegion *intersection;
intersection = gdk_region_copy (invalidate_region);
gdk_region_intersect (intersection, item->u.translate.area);
gdk_region_subtract (invalidate_region, intersection);
gdk_region_offset (intersection, item->u.translate.dx, item->u.translate.dy);
gdk_region_union (invalidate_region, intersection);
gdk_region_destroy (intersection);
}
else
gdk_region_offset (invalidate_region, item->u.translate.dx, item->u.translate.dy);
}
else /* anti-expose */
{
gdk_region_subtract (invalidate_region, item->u.antiexpose.area);
}
}
}
else
{
queue_delete_link (display_x11->translate_queue, tmp_list);
queue_item_free (item);
}
tmp_list = next;
}
}
if (!gdk_region_empty (invalidate_region))
_gdk_window_invalidate_for_expose (window, invalidate_region);
gdk_region_destroy (invalidate_region);
}
#define __GDK_GEOMETRY_X11_C__
#include "gdkaliasdef.c"