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

   1 /* GDK - The GTK+ 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 #if defined(GTK_DISABLE_SINGLE_INCLUDES) && !defined (__GDK_H_INSIDE__) && !defined (GDK_COMPILATION)
  28 #error "Only <gdk/gdk.h> can be included directly."
  29 #endif
  30
  31 #ifndef __GDK_REGION_H__
  32 #define __GDK_REGION_H__
  33
  34 #include <gdk/gdktypes.h>
  35
  36 G_BEGIN_DECLS
  37
  38 /* GC fill rule for polygons
  39  *  EvenOddRule
  40  *  WindingRule
  41  */
  42 typedef enum
  43 {
  44   GDK_EVEN_ODD_RULE,
  45   GDK_WINDING_RULE
  46 } GdkFillRule;
  47
  48 /* Types of overlapping between a rectangle and a region
  49  * GDK_OVERLAP_RECTANGLE_IN: rectangle is in region
  50  * GDK_OVERLAP_RECTANGLE_OUT: rectangle in not in region
  51  * GDK_OVERLAP_RECTANGLE_PART: rectangle in partially in region
  52  */
  53 typedef enum
  54 {
  55   GDK_OVERLAP_RECTANGLE_IN,
  56   GDK_OVERLAP_RECTANGLE_OUT,
  57   GDK_OVERLAP_RECTANGLE_PART
  58 } GdkOverlapType;
  59
  60 typedef void (* GdkSpanFunc) (GdkSpan *span,
  61                               gpointer data);
  62
  63 GdkRegion    * gdk_region_new             (void);
  64 GdkRegion    * gdk_region_polygon         (const GdkPoint     *points,
  65                                            gint                n_points,
  66                                            GdkFillRule         fill_rule);
  67 GdkRegion    * gdk_region_copy            (const GdkRegion    *region);
  68 GdkRegion    * gdk_region_rectangle       (const GdkRectangle *rectangle);
  69 void           gdk_region_destroy         (GdkRegion          *region);
  70
  71 void           gdk_region_get_clipbox     (const GdkRegion    *region,
  72                                            GdkRectangle       *rectangle);
  73 void           gdk_region_get_rectangles  (const GdkRegion    *region,
  74                                            GdkRectangle      **rectangles,
  75                                            gint               *n_rectangles);
  76
  77 gboolean       gdk_region_empty           (const GdkRegion    *region);
  78 gboolean       gdk_region_equal           (const GdkRegion    *region1,
  79                                            const GdkRegion    *region2);
  80 gboolean       gdk_region_point_in        (const GdkRegion    *region,
  81                                            int                 x,
  82                                            int                 y);
  83 GdkOverlapType gdk_region_rect_in         (const GdkRegion    *region,
  84                                            const GdkRectangle *rectangle);
  85
  86 void           gdk_region_offset          (GdkRegion          *region,
  87                                            gint                dx,
  88                                            gint                dy);
  89 void           gdk_region_shrink          (GdkRegion          *region,
  90                                            gint                dx,
  91                                            gint                dy);
  92 void           gdk_region_union_with_rect (GdkRegion          *region,
  93                                            const GdkRectangle *rect);
  94 void           gdk_region_intersect       (GdkRegion          *source1,
  95                                            const GdkRegion    *source2);
  96 void           gdk_region_union           (GdkRegion          *source1,
  97                                            const GdkRegion    *source2);
  98 void           gdk_region_subtract        (GdkRegion          *source1,
  99                                            const GdkRegion    *source2);
 100 void           gdk_region_xor             (GdkRegion          *source1,
 101                                            const GdkRegion    *source2);
 102
 103 void   gdk_region_spans_intersect_foreach (GdkRegion          *region,
 104                                            const GdkSpan      *spans,
 105                                            int                 n_spans,
 106                                            gboolean            sorted,
 107                                            GdkSpanFunc         function,
 108                                            gpointer            data);
 109
 110 G_END_DECLS
 111
 112 #endif /* __GDK_REGION_H__ */
 113