+// extract key = value
+int parse_line (const char *line, char **key, char **value);
+
+// conversion
+int hex_char_to_int (char c);
+int hex_to_rgb (char *hex, int *r, int *g, int *b);
+void get_color (char *hex, double *rgb);
+
+// adjust Alpha/Saturation/Brightness on an ARGB icon
+// alpha from 0 to 100, satur from 0 to 1, bright from 0 to 1.
+void adjust_asb(DATA32 *data, int w, int h, int alpha, float satur, float bright);