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gdk: Make window moves a custom vfunc

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The window move code needs special attention for multiple reasons:
- invalid areas for expose events need to be modified
- self-copy is not supported by Cairo
- in X11, copying from an overlapped Window might cause unexposed areas
  to be copied in, spo expose events for those need to be generated.

This was all special cased in various parts of the code. By making it an
explicit vfunc, we can work around it.
This commit is contained in:
Benjamin Otte 2010-07-21 20:37:33 +02:00
parent a581401920
commit 65ac54bb23
9 changed files with 133 additions and 99 deletions
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32
gdk/gdkoffscreenwindow.c
View File

@ -832,12 +832,38 @@ gdk_offscreen_window_queue_antiexpose (GdkWindow *window,
}
static void
gdk_offscreen_window_queue_translation (GdkWindow *window,
GdkGC *gc,
gdk_offscreen_window_translate (GdkWindow *window,
cairo_region_t *area,
gint dx,
gint dy)
{
cairo_surface_t *surface;
cairo_t *cr;
/* Can't use gdk_cairo_create here due to clipping */
surface = _gdk_drawable_ref_cairo_surface (window);
cr = cairo_create (surface);
cairo_surface_destroy (surface);
area = cairo_region_copy (area);
gdk_cairo_region (cr, area);
cairo_clip (cr);
/* NB: This is a self-copy and Cairo doesn't support that yet.
* So we do a litle trick.
*/
cairo_push_group (cr);
gdk_cairo_set_source_pixmap (cr, window, dx, dy);
cairo_paint (cr);
cairo_pop_group_to_source (cr);
cairo_paint (cr);
cairo_destroy (cr);
_gdk_window_add_damage (window, area);
}
/**
@ -950,7 +976,7 @@ gdk_offscreen_window_impl_iface_init (GdkWindowImplIface *iface)
iface->input_shape_combine_region = gdk_offscreen_window_input_shape_combine_region;
iface->set_static_gravities = gdk_offscreen_window_set_static_gravities;
iface->queue_antiexpose = gdk_offscreen_window_queue_antiexpose;
iface->queue_translation = gdk_offscreen_window_queue_translation;
iface->translate = gdk_offscreen_window_translate;
iface->get_root_coords = gdk_offscreen_window_get_root_coords;
iface->get_deskrelative_origin = gdk_offscreen_window_get_deskrelative_origin;
iface->get_device_state = gdk_offscreen_window_get_device_state;

38
gdk/gdkwindow.c
View File

@ -3223,45 +3223,11 @@ do_move_region_bits_on_impl (GdkWindowObject *impl_window,
cairo_region_t *dest_region, /* In impl window coords */
int dx, int dy)
{
GdkGC *tmp_gc;
GdkRectangle copy_rect;
GdkWindowObject *private;
GdkWindowImplIface *impl_iface;
/* We need to get data from subwindows here, because we might have
* shaped a native window over the moving region (with bg none,
* so the pixels are still there). In fact we might need to get data
* from overlapping native window that are not children of this window,
* so we copy from the toplevel with INCLUDE_INFERIORS.
*/
private = impl_window;
while (!gdk_window_is_toplevel (private))
{
dx -= private->parent->abs_x + private->x;
dy -= private->parent->abs_y + private->y;
private = gdk_window_get_impl_window (private->parent);
}
tmp_gc = _gdk_drawable_get_subwindow_scratch_gc ((GdkWindow *)private);
impl_iface = GDK_WINDOW_IMPL_GET_IFACE (impl_window->impl);
cairo_region_get_extents (dest_region, &copy_rect);
gdk_gc_set_clip_region (tmp_gc, dest_region);
/* The region area is moved and we queue translations for all expose events
to the source area that were sent prior to the copy */
cairo_region_translate (dest_region, -dx, -dy); /* Move to source region */
impl_iface = GDK_WINDOW_IMPL_GET_IFACE (private->impl);
impl_iface->queue_translation ((GdkWindow *)impl_window,
tmp_gc,
dest_region, dx, dy);
gdk_draw_drawable (impl_window->impl,
tmp_gc,
private->impl,
copy_rect.x-dx, copy_rect.y-dy,
copy_rect.x, copy_rect.y,
copy_rect.width, copy_rect.height);
gdk_gc_set_clip_region (tmp_gc, NULL);
impl_iface->translate ((GdkWindow *) impl_window, dest_region, dx, dy);
}
static GdkWindowRegionMove *

9
gdk/gdkwindowimpl.h
View File

@ -122,8 +122,13 @@ struct _GdkWindowImplIface
*/
gboolean (* queue_antiexpose) (GdkWindow *window,
cairo_region_t *update_area);
void (* queue_translation) (GdkWindow *window,
GdkGC *gc,
/* Called to move @area inside @window by @dx x @dy pixels. @area is
* guaranteed to be inside @window. If part of @area is not invisible or
* invalid, it is this function's job to queue expose events in those
* areas.
*/
void (* translate) (GdkWindow *window,
cairo_region_t *area,
gint dx,
gint dy);

24
gdk/quartz/gdkgeometry-quartz.c
View File

@ -22,35 +22,33 @@
#include "gdkprivate-quartz.h"
/* FIXME: Tis function has never been compiled.
* Please make it work. */
void
_gdk_quartz_window_queue_translation (GdkWindow *window,
GdkGC *gc,
_gdk_quartz_window_translate (GdkWindow *window,
cairo_region_t *area,
gint dx,
gint dy)
{
GdkWindowObject *private = (GdkWindowObject *)window;
GdkWindowImplQuartz *impl = (GdkWindowImplQuartz *)private->impl;
GdkRectangle extents;
int i, n_rects;
cairo_region_t *intersection;
GdkRectangle rect;
cairo_region_get_extents (area, &extents);
/* We will intersect the known region that needs display with the given
* area. This intersection will be translated by dx, dy. For the end
* result, we will also set that it needs display.
*/
if (!impl->needs_display_region)
return;
[window_impl->view scrollRect:NSMakeRect (extents.x, extents.y, extents.width, extents.height)
by:NSMakeSize (dx, dy)];
if (impl->needs_display_region)
{
intersection = cairo_region_copy (impl->needs_display_region);
cairo_region_intersect (intersection, area);
cairo_region_intersect_rectangle (intersection, extents);
cairo_region_translate (intersection, dx, dy);
_gdk_quartz_window_set_needs_display_in_region (window, intersection);
cairo_region_destroy (intersection);
}
}
gboolean
_gdk_quartz_window_queue_antiexpose (GdkWindow *window,

2
gdk/quartz/gdkwindow-quartz.c
View File

@ -3102,6 +3102,6 @@ gdk_window_impl_iface_init (GdkWindowImplIface *iface)
iface->input_shape_combine_region = gdk_window_quartz_input_shape_combine_region;
iface->set_static_gravities = gdk_window_quartz_set_static_gravities;
iface->queue_antiexpose = _gdk_quartz_window_queue_antiexpose;
iface->queue_translation = _gdk_quartz_window_queue_translation;
iface->translate = _gdk_quartz_window_translate;
iface->destroy = _gdk_quartz_window_destroy;
}

30
gdk/win32/gdkwindow-win32.c
View File

@ -3282,25 +3282,27 @@ _gdk_win32_window_queue_antiexpose (GdkWindow *window,
return FALSE;
}
/*
* queue_translation is meant to only move any outstanding invalid area
* in the given area by dx,dy. A typical example of when its needed is an
* app with two toplevels where one (A) overlaps the other (B). If the
* app first moves A so that B is invalidated and then scrolls B before
* handling the expose. The scroll operation will copy the invalid area
* to a new position, but when the invalid area is then exposed it only
* redraws the old areas not the place where the invalid data was copied
* by the scroll.
*/
/* FIXME: Tis function has never been compiled.
* Please make it work. */
static void
_gdk_win32_window_queue_translation (GdkWindow *window,
GdkGC *gc,
_gdk_win32_window_translate (GdkWindow *window,
cairo_region_t *area,
gint dx,
gint dy)
{
HRGN hrgn = CreateRectRgn (0, 0, 0, 0);
int ret = GetUpdateRgn (GDK_WINDOW_HWND (window), hrgn, FALSE);
HDC hdc;
int ret;
GdkRectangle extents;
cairo_region_get_extents (area, &extents);
hdc = _gdk_win32_drawable_acquire_dc (GDK_DRAWABLE (window));
GDI_CALL (BitBlt, (hdc, extents.x, extents.y, extents.width, extents.height,
hdc, extents.x + dx, extents.y + dy, SRCCOPY));
/* XXX: We probably need to get invalidations for the whole extents and not
* just the area as we BitBlt */
ret = GetUpdateRgn (GDK_WINDOW_HWND (window), hrgn, FALSE);
if (ret == ERROR)
WIN32_API_FAILED ("GetUpdateRgn");
else if (ret != NULLREGION)
@ -3374,7 +3376,7 @@ gdk_window_impl_iface_init (GdkWindowImplIface *iface)
iface->get_deskrelative_origin = gdk_win32_window_get_deskrelative_origin;
iface->set_static_gravities = gdk_win32_window_set_static_gravities;
iface->queue_antiexpose = _gdk_win32_window_queue_antiexpose;
iface->queue_translation = _gdk_win32_window_queue_translation;
iface->translate = _gdk_win32_window_translate;
iface->destroy = _gdk_win32_window_destroy;
}

54
gdk/x11/gdkgeometry-x11.c
View File

@ -226,24 +226,62 @@ gdk_window_queue (GdkWindow *window,
}
void
_gdk_x11_window_queue_translation (GdkWindow *window,
GdkGC *gc,
_gdk_x11_window_translate (GdkWindow *window,
cairo_region_t *area,
gint dx,
gint dy)
{
GdkWindowQueueItem *item = g_new (GdkWindowQueueItem, 1);
item->type = GDK_WINDOW_QUEUE_TRANSLATE;
item->u.translate.area = area ? cairo_region_copy (area) : NULL;
item->u.translate.dx = dx;
item->u.translate.dy = dy;
GdkWindowQueueItem *item;
GdkGC *tmp_gc;
GdkRectangle extents;
GdkWindowObject *private, *impl;
int px, py;
/* We need to get data from subwindows here, because we might have
* shaped a native window over the moving region (with bg none,
* so the pixels are still there). In fact we might need to get data
* from overlapping native window that are not children of this window,
* so we copy from the toplevel with INCLUDE_INFERIORS.
*/
private = impl = (GdkWindowObject *) window;
px = py = 0;
while (private->parent != NULL &&
private->parent->window_type != GDK_WINDOW_ROOT)
{
dx -= private->parent->abs_x + private->x;
dy -= private->parent->abs_y + private->y;
private = (GdkWindowObject *) _gdk_window_get_impl_window ((GdkWindow *) private->parent);
}
cairo_region_get_extents (area, &extents);
tmp_gc = _gdk_drawable_get_subwindow_scratch_gc ((GdkWindow *)private);
gdk_gc_set_clip_region (tmp_gc, area);
cairo_region_translate (area, -dx, -dy); /* Move to source region */
/* 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_x11_gc_flush (tmp_gc);
item = g_new (GdkWindowQueueItem, 1);
item->type = GDK_WINDOW_QUEUE_TRANSLATE;
item->u.translate.area = cairo_region_copy (area);
item->u.translate.dx = dx;
item->u.translate.dy = dy;
gdk_window_queue (window, item);
XCopyArea (GDK_WINDOW_XDISPLAY (impl),
GDK_DRAWABLE_IMPL_X11 (private->impl)->xid,
GDK_DRAWABLE_IMPL_X11 (impl->impl)->xid,
GDK_GC_GET_XGC (tmp_gc),
extents.x - dx, extents.y - dy,
extents.width, extents.height,
extents.x, extents.y);
gdk_gc_set_clip_region (tmp_gc, NULL);
}
gboolean

3
gdk/x11/gdkprivate-x11.h
View File

@ -118,8 +118,7 @@ void _gdk_window_process_expose (GdkWindow *window,
gboolean _gdk_x11_window_queue_antiexpose (GdkWindow *window,
cairo_region_t *area);
void _gdk_x11_window_queue_translation (GdkWindow *window,
GdkGC *gc,
void _gdk_x11_window_translate (GdkWindow *window,
cairo_region_t *area,
gint dx,
gint dy);

2
gdk/x11/gdkwindow-x11.c
View File

@ -5562,7 +5562,7 @@ gdk_window_impl_iface_init (GdkWindowImplIface *iface)
iface->input_shape_combine_region = gdk_window_x11_input_shape_combine_region;
iface->set_static_gravities = gdk_window_x11_set_static_gravities;
iface->queue_antiexpose = _gdk_x11_window_queue_antiexpose;
iface->queue_translation = _gdk_x11_window_queue_translation;
iface->translate = _gdk_x11_window_translate;
iface->destroy = _gdk_x11_window_destroy;
iface->supports_native_bg = TRUE;
}