lib/art/art_rect.h

   1 /* Libart_LGPL - library of basic graphic primitives
   2  * Copyright (C) 1998 Raph Levien
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library 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 #ifndef __ART_RECT_H__
  21 #define __ART_RECT_H__
  22
  23 #ifdef __cplusplus
  24 extern "C" {
  25 #endif
  26
  27 typedef struct _ArtDRect ArtDRect;
  28 typedef struct _ArtIRect ArtIRect;
  29
  30 struct _ArtDRect {
  31   /*< public >*/
  32   double x0, y0, x1, y1;
  33 };
  34
  35 struct _ArtIRect {
  36   /*< public >*/
  37   int x0, y0, x1, y1;
  38 };
  39
  40 /* Make a copy of the rectangle. */
  41 void art_irect_copy (ArtIRect *dest, const ArtIRect *src);
  42
  43 /* Find the smallest rectangle that includes both source rectangles. */
  44 void art_irect_union (ArtIRect *dest,
  45                       const ArtIRect *src1, const ArtIRect *src2);
  46
  47 /* Return the intersection of the two rectangles */
  48 void art_irect_intersect (ArtIRect *dest,
  49                           const ArtIRect *src1, const ArtIRect *src2);
  50
  51 /* Return true if the rectangle is empty. */
  52 int art_irect_empty (const ArtIRect *src);
  53
  54 /* Make a copy of the rectangle. */
  55 void art_drect_copy (ArtDRect *dest, const ArtDRect *src);
  56
  57 /* Find the smallest rectangle that includes both source rectangles. */
  58 void art_drect_union (ArtDRect *dest,
  59                       const ArtDRect *src1, const ArtDRect *src2);
  60
  61 /* Return the intersection of the two rectangles */
  62 void art_drect_intersect (ArtDRect *dest,
  63                           const ArtDRect *src1, const ArtDRect *src2);
  64
  65 /* Return true if the rectangle is empty. */
  66 int art_drect_empty (const ArtDRect *src);
  67
  68 void
  69 art_drect_affine_transform (ArtDRect *dst, const ArtDRect *src,
  70                            const double matrix[6]);
  71
  72 void art_drect_to_irect (ArtIRect *dst, ArtDRect *src);
  73
  74 #ifdef __cplusplus
  75 }
  76 #endif
  77
  78 #endif