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