lib/art/art_uta.c

   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 #include "config.h"
  21 #include "art_uta.h"
  22
  23 #include <string.h>
  24 #include "art_misc.h"
  25
  26 /**
  27  * art_uta_new: Allocate a new uta.
  28  * @x0: Left coordinate of uta.
  29  * @y0: Top coordinate of uta.
  30  * @x1: Right coordinate of uta.
  31  * @y1: Bottom coordinate of uta.
  32  *
  33  * Allocates a new microtile array. The arguments are in units of
  34  * tiles, not pixels.
  35  *
  36  * Returns: the newly allocated #ArtUta.
  37  **/
  38 ArtUta *
  39 art_uta_new (int x0, int y0, int x1, int y1)
  40 {
  41   ArtUta *uta;
  42
  43   uta = art_new (ArtUta, 1);
  44   uta->x0 = x0;
  45   uta->y0 = y0;
  46   uta->width = x1 - x0;
  47   uta->height = y1 - y0;
  48
  49   uta->utiles = art_new (ArtUtaBbox, uta->width * uta->height);
  50
  51   memset (uta->utiles, 0, uta->width * uta->height * sizeof(ArtUtaBbox));
  52   return uta;
  53   }
  54
  55 /**
  56  * art_uta_new_coords: Allocate a new uta, based on pixel coordinates.
  57  * @x0: Left coordinate of uta.
  58  * @y0: Top coordinate of uta.
  59  * @x1: Right coordinate of uta.
  60  * @y1: Bottom coordinate of uta.
  61  *
  62  * Allocates a new microtile array. The arguments are in pixels
  63  *
  64  * Returns: the newly allocated #ArtUta.
  65  **/
  66 ArtUta *
  67 art_uta_new_coords (int x0, int y0, int x1, int y1)
  68 {
  69   return art_uta_new (x0 >> ART_UTILE_SHIFT, y0 >> ART_UTILE_SHIFT,
  70                       1 + (x1 >> ART_UTILE_SHIFT),
  71                       1 + (y1 >> ART_UTILE_SHIFT));
  72 }
  73
  74 /**
  75  * art_uta_free: Free a uta.
  76  * @uta: The uta to free.
  77  *
  78  * Frees the microtile array structure, including the actual microtile
  79  * data.
  80  **/
  81 void
  82 art_uta_free (ArtUta *uta)
  83 {
  84   art_free (uta->utiles);
  85   art_free (uta);
  86 }
  87
  88 /* User to Aardvark! */