rom/hyperlayers/intregions.h

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Some common macros for rectangles and regions.
   6     Lang: english
   7 */
   8
   9 #ifndef INTREGIONS_H
  10 #define INTREGIONS_H
  11
  12 #include <proto/graphics.h>
  13
  14 #define MinX(rr)   ((rr)->bounds.MinX)
  15 #define MaxX(rr)   ((rr)->bounds.MaxX)
  16 #define MinY(rr)   ((rr)->bounds.MinY)
  17 #define MaxY(rr)   ((rr)->bounds.MaxY)
  18
  19 /* CHECKME: Aren't the following candidates for moving into graphics/gfxmacros.h ? */
  20
  21 #define _DoRectsOverlap(Rect, Rect2)          \
  22 (                                             \
  23     (Rect2)->MinY <= (Rect)->MaxY &&          \
  24     (Rect2)->MaxY >= (Rect)->MinY &&          \
  25     (Rect2)->MinX <= (Rect)->MaxX &&          \
  26     (Rect2)->MaxX >= (Rect)->MinX             \
  27 )
  28
  29 #define overlap(a, b) _DoRectsOverlap(&(a), &(b))
  30
  31 #define _TranslateRect(rect, dx, dy) \
  32 do                                   \
  33 {                                    \
  34     (rect)->MinX += dx;              \
  35     (rect)->MinY += dy;              \
  36     (rect)->MaxX += dx;              \
  37     (rect)->MaxY += dy;              \
  38 } while(0)
  39
  40 #define InitRegion(region)            \
  41 do                                    \
  42 {                                     \
  43     (region)->bounds.MinX = 0;        \
  44     (region)->bounds.MinY = 0;        \
  45     (region)->bounds.MaxX = 0;        \
  46     (region)->bounds.MaxY = 0;        \
  47     (region)->RegionRectangle = NULL; \
  48 } while (0)
  49
  50 static inline struct Region *_NewRectRegion(WORD MinX, WORD MinY, WORD MaxX, WORD MaxY, struct GfxBase *GfxBase)
  51 {
  52     struct Region *region = NewRegion();
  53
  54     if (region)
  55     {
  56         struct Rectangle rect = {MinX, MinY, MaxX, MaxY};
  57
  58         if (OrRectRegion(region, &rect))
  59             return region;
  60
  61         DisposeRegion(region);
  62     }
  63
  64     return NULL;
  65
  66 } /* NewRectRegion */
  67
  68 #endif /* !INTREGIONS_H */