1 files changed, 109 insertions, 0 deletions
diff --git a/src/3rdparty/autotrace/color.c b/src/3rdparty/autotrace/color.c
new file mode 100644
index 0000000..e986e9c
--- /dev/null
+++ b/src/3rdparty/autotrace/color.c
@@ -0,0 +1,109 @@
+/* color.c: declarations for color handling.
+
+  Copyright (C) 2000, 2001, 2002 Martin Weber
+
+  The author can be contacted at <martweb@gmx.net>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  This program 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* Def: HAVE_CONFIG_H */
+
+#include "intl.h"
+#include "color.h"
+#include "exception.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+at_color *at_color_new(unsigned char r, unsigned char g, unsigned char b)
+{
+  at_color *color;
+  color = g_new(at_color, 1);
+  color->r = r;
+  color->g = g;
+  color->b = b;
+  return color;
+}
+
+at_color *at_color_parse(const gchar * string, GError ** err)
+{
+  GError *local_err = NULL;
+  unsigned char c[6];
+  int i;
+
+  if (!string)
+    return NULL;
+  else if (string[0] == '\0')
+    return NULL;
+  else if (strlen(string) != 6) {
+    g_set_error(err, AT_ERROR, AT_ERROR_WRONG_COLOR_STRING, _("color string is too short: %s"), string);
+    return NULL;
+  }
+
+  for (i = 0; i < 6; i++) {
+    char *endptr;
+    c[i] = (int)strtol(&string[i], &endptr, 16);
+    if (endptr == &string[i]) {
+      g_set_error(&local_err, AT_ERROR, AT_ERROR_WRONG_COLOR_STRING, _("wrong char in color string: %c"), string[i]);
+      g_propagate_error(err, local_err);
+      return NULL;
+    }
+  }
+  return at_color_new((unsigned char)(16 * c[0] + c[1]), (unsigned char)(16 * c[2] + c[3]), (unsigned char)(16 * c[4] + c[5]));
+}
+
+at_color *at_color_copy(const at_color * original)
+{
+  if (original == NULL)
+    return NULL;
+
+  return at_color_new(original->r, original->g, original->b);
+}
+
+gboolean at_color_equal(const at_color * c1, const at_color * c2)
+{
+  if (c1 == c2 || ((c1->r == c2->r) && (c1->g == c2->g) && (c1->b == c2->b)))
+    return TRUE;
+
+  return FALSE;
+}
+
+void at_color_set(at_color * c, unsigned char r, unsigned char g, unsigned char b)
+{
+  g_return_if_fail(c);
+  c->r = r;
+  c->g = g;
+  c->b = b;
+}
+
+unsigned char at_color_luminance(const at_color * color)
+{
+  return ((unsigned char)((color->r) * 0.30 + (color->g) * 0.59 + (color->b) * 0.11 + 0.5));
+}
+
+void at_color_free(at_color * color)
+{
+  g_free(color);
+}
+
+GType at_color_get_type(void)
+{
+  static GType our_type = 0;
+  if (our_type == 0)
+    our_type = g_boxed_type_register_static("AtColor", (GBoxedCopyFunc) at_color_copy, (GBoxedFreeFunc) at_color_free);
+  return our_type;
+}