lib/art/art_uta.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_UTA_H__
  21 #define __ART_UTA_H__
  22
  23 /* Basic data structures and constructors for microtile arrays */
  24
  25 #ifdef LIBART_COMPILATION
  26 #include "art_misc.h"
  27 #else
  28 #include "art_misc.h"
  29 #endif
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif /* __cplusplus */
  34
  35 typedef art_u32 ArtUtaBbox;
  36 typedef struct _ArtUta ArtUta;
  37
  38 #define ART_UTA_BBOX_CONS(x0, y0, x1, y1) (((x0) << 24) | ((y0) << 16) | \
  39                                        ((x1) << 8) | (y1))
  40
  41 #define ART_UTA_BBOX_X0(ub) ((ub) >> 24)
  42 #define ART_UTA_BBOX_Y0(ub) (((ub) >> 16) & 0xff)
  43 #define ART_UTA_BBOX_X1(ub) (((ub) >> 8) & 0xff)
  44 #define ART_UTA_BBOX_Y1(ub) ((ub) & 0xff)
  45
  46 #define ART_UTILE_SHIFT 5
  47 #define ART_UTILE_SIZE (1 << ART_UTILE_SHIFT)
  48
  49 /* Coordinates are shifted right by ART_UTILE_SHIFT wrt the real
  50    coordinates. */
  51 struct _ArtUta {
  52   int x0;
  53   int y0;
  54   int width;
  55   int height;
  56   ArtUtaBbox *utiles;
  57 };
  58
  59 ArtUta *
  60 art_uta_new (int x0, int y0, int x1, int y1);
  61
  62 ArtUta *
  63 art_uta_new_coords (int x0, int y0, int x1, int y1);
  64
  65 void
  66 art_uta_free (ArtUta *uta);
  67
  68 #ifdef __cplusplus
  69 }
  70 #endif /* __cplusplus */
  71
  72 #endif /* __ART_UTA_H__ */