libart 2.3.16

[swftools.git] / lib / art / art_uta.c

diff --git a/lib/art/art_uta.c b/lib/art/art_uta.c
new file mode 100644 (file)
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+++ b/lib/art/art_uta.c
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+/* Libart_LGPL - library of basic graphic primitives
+ * Copyright (C) 1998 Raph Levien
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+#include "art_uta.h"
+
+#include <string.h>
+#include "art_misc.h"
+
+/**
+ * art_uta_new: Allocate a new uta.
+ * @x0: Left coordinate of uta.
+ * @y0: Top coordinate of uta.
+ * @x1: Right coordinate of uta.
+ * @y1: Bottom coordinate of uta.
+ *
+ * Allocates a new microtile array. The arguments are in units of
+ * tiles, not pixels.
+ *
+ * Returns: the newly allocated #ArtUta.
+ **/
+ArtUta *
+art_uta_new (int x0, int y0, int x1, int y1)
+{
+  ArtUta *uta;
+
+  uta = art_new (ArtUta, 1);
+  uta->x0 = x0;
+  uta->y0 = y0;
+  uta->width = x1 - x0;
+  uta->height = y1 - y0;
+
+  uta->utiles = art_new (ArtUtaBbox, uta->width * uta->height);
+
+  memset (uta->utiles, 0, uta->width * uta->height * sizeof(ArtUtaBbox));
+  return uta;
+  }
+
+/**
+ * art_uta_new_coords: Allocate a new uta, based on pixel coordinates.
+ * @x0: Left coordinate of uta.
+ * @y0: Top coordinate of uta.
+ * @x1: Right coordinate of uta.
+ * @y1: Bottom coordinate of uta.
+ *
+ * Allocates a new microtile array. The arguments are in pixels
+ *
+ * Returns: the newly allocated #ArtUta.
+ **/
+ArtUta *
+art_uta_new_coords (int x0, int y0, int x1, int y1)
+{
+  return art_uta_new (x0 >> ART_UTILE_SHIFT, y0 >> ART_UTILE_SHIFT,
+                     1 + (x1 >> ART_UTILE_SHIFT),
+                     1 + (y1 >> ART_UTILE_SHIFT));
+}
+
+/**
+ * art_uta_free: Free a uta.
+ * @uta: The uta to free.
+ *
+ * Frees the microtile array structure, including the actual microtile
+ * data.
+ **/
+void
+art_uta_free (ArtUta *uta)
+{
+  art_free (uta->utiles);
+  art_free (uta);
+}
+
+/* User to Aardvark! */