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/* 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 <X11/Xlib.h>
#include <X11/Xutil.h>
#include "gdk.h"
#include "gdkprivate.h"
GdkRegion*
gdk_region_new (void)
{
GdkRegionPrivate *private;
GdkRegion *region;
Region xregion;
xregion = XCreateRegion();
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;
XDestroyRegion (private->xregion);
g_free (private);
}
gboolean
gdk_region_empty (GdkRegion *region)
{
GdkRegionPrivate *private;
g_return_val_if_fail (region != NULL, 0);
private = (GdkRegionPrivate *) region;
return XEmptyRegion (private->xregion);
}
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 XEqualRegion (private1->xregion, private2->xregion);
}
void
gdk_region_get_clipbox(GdkRegion *region,
GdkRectangle *rectangle)
{
GdkRegionPrivate *rp;
XRectangle r;
g_return_if_fail(region != NULL);
g_return_if_fail(rectangle != NULL);
rp = (GdkRegionPrivate *)region;
XClipBox(rp->xregion, &r);
rectangle->x = r.x;
rectangle->y = r.y;
rectangle->width = r.width;
rectangle->height = r.height;
}
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 XPointInRegion (private->xregion, x, y);
}
GdkOverlapType
gdk_region_rect_in (GdkRegion *region,
GdkRectangle *rect)
{
GdkRegionPrivate *private;
int res;
g_return_val_if_fail (region != NULL, 0);
private = (GdkRegionPrivate *) region;
res = XRectInRegion (private->xregion, rect->x, rect->y, rect->width, rect->height);
switch (res)
{
case RectangleIn: return GDK_OVERLAP_RECTANGLE_IN;
case RectangleOut: return GDK_OVERLAP_RECTANGLE_OUT;
case RectanglePart: 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;
Region xregion;
gint xfill_rule = EvenOddRule;
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 = EvenOddRule;
break;
case GDK_WINDING_RULE:
xfill_rule = WindingRule;
break;
}
xregion = XPolygonRegion ((XPoint *) points, npoints, xfill_rule);
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;
XOffsetRegion (private->xregion, dx, dy);
}
void
gdk_region_shrink (GdkRegion *region,
gint dx,
gint dy)
{
GdkRegionPrivate *private;
g_return_if_fail (region != NULL);
private = (GdkRegionPrivate *) region;
XShrinkRegion (private->xregion, dx, dy);
}
GdkRegion*
gdk_region_union_with_rect (GdkRegion *region,
GdkRectangle *rect)
{
GdkRegionPrivate *private;
GdkRegion *res;
GdkRegionPrivate *res_private;
XRectangle xrect;
g_return_val_if_fail (region != NULL, NULL);
private = (GdkRegionPrivate *) region;
xrect.x = rect->x;
xrect.y = rect->y;
xrect.width = rect->width;
xrect.height = rect->height;
res = gdk_region_new ();
res_private = (GdkRegionPrivate *) res;
XUnionRectWithRegion (&xrect, private->xregion, res_private->xregion);
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;
XIntersectRegion (private1->xregion, private2->xregion, res_private->xregion);
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;
XUnionRegion (private1->xregion, private2->xregion, res_private->xregion);
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;
XSubtractRegion (private1->xregion, private2->xregion, res_private->xregion);
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;
XXorRegion (private1->xregion, private2->xregion, res_private->xregion);
return res;
}
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