gtk2/gdk/win32/gdkregion.c
Tor Lillqvist d142187b38 Fixes to the win32 backend to actually be able to compile within a
directory hierarchy like this, with common gdk.h and gdktypes.h
for all backends. gdkrectangles.c and gdkrgb.c is copied before
compilation from the x11 backed (which still is in .., but
eventually will be in ..\x11).
1999-03-17 20:12:47 +00:00

351 lines
8.1 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;
/* Create an empty region */
xregion = CreateRectRgn (1, 1, 0, 0);
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;
RECT r;
g_return_if_fail (region != NULL);
private = (GdkRegionPrivate *) region;
/* Is it correct just to intersect it with a smaller bounding box? */
GetRgnBox (private->xregion, &r);
if (-dx > r.right - r.left)
{
r.left += dx/2;
r.right -= dx/2;
}
if (-dy > r.bottom - r.top)
{
r.top += dy/2;
r.bottom -= dy/2;
}
CombineRgn (private->xregion, private->xregion,
CreateRectRgnIndirect (&r), RGN_AND);
}
GdkRegion*
gdk_region_union_with_rect (GdkRegion *region,
GdkRectangle *rect)
{
GdkRegionPrivate *private;
GdkRegion *res;
GdkRegionPrivate *res_private;
RECT xrect;
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;
CombineRgn (res_private->xregion, private->xregion,
CreateRectRgnIndirect (&xrect), RGN_OR);
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;
}