gtk/gdk/win32/gdkregion.c
Tor Lillqvist c9b2958b6c Don't draw anything if width or height is zero. Don't print a warning if
* gdk/win32/gdkdraw.c (gdk_draw_arc): Don't draw anything if width
 	or height is zero. Don't print a warning if Pie or Arc fails, they
	always fail (?) for very narrow ellipses.

	* gdk/win32/gdkdraw.c (gdk_draw_pixmap): Call InvalidateRgn for
 	the part or the destination window corresponding to source area
 	outside of the source drawable's boundary.

	* gdk/win32/gdkdraw.c (gdk_draw_lines, gdk_draw_polygon): Don't do
 	anything if less than two points.

	* gdk/win32/gdkselection.c (gdk_selection_owner_get): Always
 	return NULL. Gtk cut-and-paste inside a single program works
 	better this way. (It always gets the clipboard contents from
 	Windows, not from its own copy, which is cleared anyway. I can't
 	say I fully understand what happens... Emulating the X selection
 	and property stuff is a bit of a mess.)

	* gdk/win32/gdkevents.c
	* gdk/win32/gdkproperty.c: A bít more verbose logging.

	* gdk/win32/gdkregion.c: Fix some memory leaks (temporary regions
 	that never got deleted). Revamp gdk_region_shrink.

	* gdk/win32/gdkregion.c: Fix memory leak, delete temporary regions
 	after use.

	* gtk/gtk.def: Add some missing entry points.

	* gtk/gtkrc.c: Strip trailing directory separator from pixmap path
 	component.
1999-07-10 00:26:54 +00:00

368 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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <gdk/gdk.h>
#include "gdkprivate.h"
GdkRegion*
gdk_region_new (void)
{
GdkRegionPrivate *private;
GdkRegion *region;
HRGN xregion;
RECT emptyRect;
/* Create an empty region */
SetRectEmpty (&emptyRect);
xregion = CreateRectRgnIndirect (&emptyRect);
private = g_new (GdkRegionPrivate, 1);
private->xregion = xregion;
region = (GdkRegion*) private;
region->user_data = NULL;
return region;
}
void
gdk_region_destroy (GdkRegion *region)
{
GdkRegionPrivate *private;
g_return_if_fail (region != NULL);
private = (GdkRegionPrivate *) region;
DeleteObject (private->xregion);
g_free (private);
}
gboolean
gdk_region_empty (GdkRegion *region)
{
GdkRegionPrivate *private;
RECT rect;
g_return_val_if_fail (region != NULL, 0);
private = (GdkRegionPrivate *) region;
return (GetRgnBox (private->xregion, &rect) == NULLREGION);
}
gboolean
gdk_region_equal (GdkRegion *region1,
GdkRegion *region2)
{
GdkRegionPrivate *private1;
GdkRegionPrivate *private2;
g_return_val_if_fail (region1 != NULL, 0);
g_return_val_if_fail (region2 != NULL, 0);
private1 = (GdkRegionPrivate *) region1;
private2 = (GdkRegionPrivate *) region2;
return EqualRgn (private1->xregion, private2->xregion);
}
void
gdk_region_get_clipbox(GdkRegion *region,
GdkRectangle *rectangle)
{
GdkRegionPrivate *rp;
RECT r;
g_return_if_fail(region != NULL);
g_return_if_fail(rectangle != NULL);
rp = (GdkRegionPrivate *)region;
GetRgnBox (rp->xregion, &r);
rectangle->x = r.left;
rectangle->y = r.top;
rectangle->width = r.right - r.left;
rectangle->height = r.bottom - r.top;
}
gboolean
gdk_region_point_in (GdkRegion *region,
gint x,
gint y)
{
GdkRegionPrivate *private;
g_return_val_if_fail (region != NULL, 0);
private = (GdkRegionPrivate *) region;
return PtInRegion (private->xregion, x, y);
}
GdkOverlapType
gdk_region_rect_in (GdkRegion *region,
GdkRectangle *rect)
{
GdkRegionPrivate *private;
RECT r;
int res;
g_return_val_if_fail (region != NULL, 0);
private = (GdkRegionPrivate *) region;
r.left = rect->x;
r.top = rect->y;
r.right = rect->x + rect->width;
r.bottom = rect->y + rect->height;
if (RectInRegion (private->xregion, &r))
return GDK_OVERLAP_RECTANGLE_PART;
return GDK_OVERLAP_RECTANGLE_OUT; /*what else ? */
}
GdkRegion *
gdk_region_polygon (GdkPoint *points,
gint npoints,
GdkFillRule fill_rule)
{
GdkRegionPrivate *private;
GdkRegion *region;
HRGN xregion;
POINT *pts;
gint xfill_rule = ALTERNATE;
gint i;
g_return_val_if_fail (points != NULL, NULL);
g_return_val_if_fail (npoints != 0, NULL); /* maybe we should check for at least three points */
switch (fill_rule)
{
case GDK_EVEN_ODD_RULE:
xfill_rule = ALTERNATE;
break;
case GDK_WINDING_RULE:
xfill_rule = WINDING;
break;
}
pts = g_malloc (npoints * sizeof (*pts));
for (i = 0; i < npoints; i++)
{
pts[i].x = points[i].x;
pts[i].y = points[i].y;
}
xregion = CreatePolygonRgn (pts, npoints, xfill_rule);
g_free (pts);
private = g_new (GdkRegionPrivate, 1);
private->xregion = xregion;
region = (GdkRegion *) private;
region->user_data = NULL;
return region;
}
void
gdk_region_offset (GdkRegion *region,
gint dx,
gint dy)
{
GdkRegionPrivate *private;
g_return_if_fail (region != NULL);
private = (GdkRegionPrivate *) region;
OffsetRgn (private->xregion, dx, dy);
}
void
gdk_region_shrink (GdkRegion *region,
gint dx,
gint dy)
{
GdkRegionPrivate *private;
HRGN shrunken_bbox;
RECT r;
g_return_if_fail (region != NULL);
private = (GdkRegionPrivate *) region;
if (dx > 0 || dy > 0)
{
/* We want to shrink it in one or both dimensions.
* Is it correct just to intersect it with a smaller bounding box?
* XXX
*/
GetRgnBox (private->xregion, &r);
if (dx > 0)
{
r.left += dx - dx/2;
r.right -= dx/2;
}
if (dy > 0)
{
r.top += dy - dy/2;
r.bottom -= dy/2;
}
shrunken_bbox = CreateRectRgnIndirect (&r);
CombineRgn (private->xregion, private->xregion,
shrunken_bbox, RGN_AND);
DeleteObject (shrunken_bbox);
}
else
{
/* Do nothing if the regions is expanded? XXX */
}
}
GdkRegion*
gdk_region_union_with_rect (GdkRegion *region,
GdkRectangle *rect)
{
GdkRegionPrivate *private;
GdkRegion *res;
GdkRegionPrivate *res_private;
RECT xrect;
HRGN rectangle;
g_return_val_if_fail (region != NULL, NULL);
private = (GdkRegionPrivate *) region;
xrect.left = rect->x;
xrect.top = rect->y;
xrect.right = rect->x + rect->width;
xrect.bottom = rect->y + rect->height;
res = gdk_region_new ();
res_private = (GdkRegionPrivate *) res;
rectangle = CreateRectRgnIndirect (&xrect);
CombineRgn (res_private->xregion, private->xregion,
rectangle, RGN_OR);
DeleteObject (rectangle);
return res;
}
GdkRegion*
gdk_regions_intersect (GdkRegion *source1,
GdkRegion *source2)
{
GdkRegionPrivate *private1;
GdkRegionPrivate *private2;
GdkRegion *res;
GdkRegionPrivate *res_private;
g_return_val_if_fail (source1 != NULL, NULL);
g_return_val_if_fail (source2 != NULL, NULL);
private1 = (GdkRegionPrivate *) source1;
private2 = (GdkRegionPrivate *) source2;
res = gdk_region_new ();
res_private = (GdkRegionPrivate *) res;
CombineRgn (res_private->xregion, private1->xregion, private2->xregion,
RGN_AND);
return res;
}
GdkRegion*
gdk_regions_union (GdkRegion *source1,
GdkRegion *source2)
{
GdkRegionPrivate *private1;
GdkRegionPrivate *private2;
GdkRegion *res;
GdkRegionPrivate *res_private;
g_return_val_if_fail (source1 != NULL, NULL);
g_return_val_if_fail (source2 != NULL, NULL);
private1 = (GdkRegionPrivate *) source1;
private2 = (GdkRegionPrivate *) source2;
res = gdk_region_new ();
res_private = (GdkRegionPrivate *) res;
CombineRgn (res_private->xregion, private1->xregion, private2->xregion,
RGN_OR);
return res;
}
GdkRegion*
gdk_regions_subtract (GdkRegion *source1,
GdkRegion *source2)
{
GdkRegionPrivate *private1;
GdkRegionPrivate *private2;
GdkRegion *res;
GdkRegionPrivate *res_private;
g_return_val_if_fail (source1 != NULL, NULL);
g_return_val_if_fail (source2 != NULL, NULL);
private1 = (GdkRegionPrivate *) source1;
private2 = (GdkRegionPrivate *) source2;
res = gdk_region_new ();
res_private = (GdkRegionPrivate *) res;
CombineRgn (res_private->xregion, private1->xregion, private2->xregion,
RGN_DIFF);
return res;
}
GdkRegion*
gdk_regions_xor (GdkRegion *source1,
GdkRegion *source2)
{
GdkRegionPrivate *private1;
GdkRegionPrivate *private2;
GdkRegion *res;
GdkRegionPrivate *res_private;
g_return_val_if_fail (source1 != NULL, NULL);
g_return_val_if_fail (source2 != NULL, NULL);
private1 = (GdkRegionPrivate *) source1;
private2 = (GdkRegionPrivate *) source2;
res = gdk_region_new ();
res_private = (GdkRegionPrivate *) res;
CombineRgn (res_private->xregion, private1->xregion, private2->xregion,
RGN_XOR);
return res;
}