Pileus Git - ~andy/gtk/blob - gdk/gdkregion.h

   1 /* GDK - The GIMP Drawing Kit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #ifndef __GDK_REGION_H__
  28 #define __GDK_REGION_H__
  29
  30 #include <gdk/gdktypes.h>
  31
  32 G_BEGIN_DECLS
  33
  34 /* GC fill rule for polygons
  35  *  EvenOddRule
  36  *  WindingRule
  37  */
  38 typedef enum
  39 {
  40   GDK_EVEN_ODD_RULE,
  41   GDK_WINDING_RULE
  42 } GdkFillRule;
  43
  44 /* Types of overlapping between a rectangle and a region
  45  * GDK_OVERLAP_RECTANGLE_IN: rectangle is in region
  46  * GDK_OVERLAP_RECTANGLE_OUT: rectangle in not in region
  47  * GDK_OVERLAP_RECTANGLE_PART: rectangle in partially in region
  48  */
  49 typedef enum
  50 {
  51   GDK_OVERLAP_RECTANGLE_IN,
  52   GDK_OVERLAP_RECTANGLE_OUT,
  53   GDK_OVERLAP_RECTANGLE_PART
  54 } GdkOverlapType;
  55
  56 typedef void (* GdkSpanFunc) (GdkSpan *span,
  57                               gpointer data);
  58
  59 GdkRegion    * gdk_region_new             (void);
  60 GdkRegion    * gdk_region_polygon         (const GdkPoint     *points,
  61                                            gint                n_points,
  62                                            GdkFillRule         fill_rule);
  63 GdkRegion    * gdk_region_copy            (const GdkRegion    *region);
  64 GdkRegion    * gdk_region_rectangle       (const GdkRectangle *rectangle);
  65 void           gdk_region_destroy         (GdkRegion          *region);
  66
  67 void           gdk_region_get_clipbox     (const GdkRegion    *region,
  68                                            GdkRectangle       *rectangle);
  69 void           gdk_region_get_rectangles  (const GdkRegion    *region,
  70                                            GdkRectangle      **rectangles,
  71                                            gint               *n_rectangles);
  72
  73 gboolean       gdk_region_empty           (const GdkRegion    *region);
  74 gboolean       gdk_region_equal           (const GdkRegion    *region1,
  75                                            const GdkRegion    *region2);
  76 gboolean       gdk_region_point_in        (const GdkRegion    *region,
  77                                            int                 x,
  78                                            int                 y);
  79 GdkOverlapType gdk_region_rect_in         (const GdkRegion    *region,
  80                                            const GdkRectangle *rectangle);
  81
  82 void           gdk_region_offset          (GdkRegion          *region,
  83                                            gint                dx,
  84                                            gint                dy);
  85 void           gdk_region_shrink          (GdkRegion          *region,
  86                                            gint                dx,
  87                                            gint                dy);
  88 void           gdk_region_union_with_rect (GdkRegion          *region,
  89                                            const GdkRectangle *rect);
  90 void           gdk_region_intersect       (GdkRegion          *source1,
  91                                            const GdkRegion    *source2);
  92 void           gdk_region_union           (GdkRegion          *source1,
  93                                            const GdkRegion    *source2);
  94 void           gdk_region_subtract        (GdkRegion          *source1,
  95                                            const GdkRegion    *source2);
  96 void           gdk_region_xor             (GdkRegion          *source1,
  97                                            const GdkRegion    *source2);
  98
  99 void   gdk_region_spans_intersect_foreach (GdkRegion          *region,
 100                                            GdkSpan            *spans,
 101                                            int                 n_spans,
 102                                            gboolean            sorted,
 103                                            GdkSpanFunc         function,
 104                                            gpointer            data);
 105
 106 G_END_DECLS
 107
 108 #endif /* __GDK_REGION_H__ */
 109