2 * libwmfun - WindowMaker texture function library
3 * Copyright (C) 1999 Tobias Gloth
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
28 RImage
*fade(int argc
, char **argv
, int width
, int height
, int relief
)
31 int from
[3] = { 0x00, 0x00, 0x00 };
32 int to
[3] = { 0xff, 0xff, 0xff };
39 int c
, done
, option_index
= 0;
42 for (done
= 0; !done
;) {
43 static struct option long_options
[] = {
49 c
= getopt_long(argc
, argv
, "f:t:", long_options
, &option_index
);
56 if (!parse_color(optarg
, from
)) {
57 error("invalid color: %s\n", optarg
);
62 if (!parse_color(optarg
, to
)) {
63 error("invalid color: %s\n", optarg
);
76 if (!start_image("fade", argc
, 0, 1, width
, height
, &image
)) {
80 this = (int *)malloc(width
* sizeof(int));
81 last
= (int *)malloc(width
* sizeof(int));
89 for (i
= 0; i
< width
; i
++) {
93 factor
= pow(0.2, 1.0 / height
);
94 delta
= (factor
< 0.5) ? 2.0 * factor
: 2.0 * (1.0 - factor
);
99 for (j
= 0; j
< height
; j
++) {
100 memcpy(last
, this, width
* sizeof(int));
101 for (i
= 0; i
< width
; i
++) {
103 int k
= i
+ random_int(3) - 1;
104 double f
= factor
+ random_double(delta
) - delta
/ 2.0;
113 this[i
] = (int)(f
* last
[k
]);
114 interpolate_color(output
, from
, to
, this[i
]);
118 if (RRGBAFormat
== image
->format
)