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wmaker/plugins/libwmfun/bilinear.c
Carlos R. Mafra 688a56e8ab Change to the linux kernel coding style
for arq in `git ls-files *.c`; do
    echo $arq;
    indent -linux -l115 $arq;
    done

The different line break at 115 columns is because
I use a widescreen monitor :-)
2009-08-20 00:59:40 +02:00

84 lines
1.9 KiB
C

/*
* libwmfun - WindowMaker texture function library
* Copyright (C) 1999 Tobias Gloth
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
/*
* $Id$
*
* $Log$
* Revision 1.1 2000/12/03 18:58:41 id
* initiate plugins branch
*
* Revision 1.1.1.1 1999/02/21 17:16:47 gloth
* initial revision
*
*/
#include "generic.h"
RImage *bilinear(int argc, char **argv, int width, int height, int relief)
{
int color[4][3];
RImage *image;
unsigned char *cptr;
int i, j, k;
argc--;
argv++;
if (!start_image("bilinear", argc, 4, 5, width, height, &image)) {
return (RImage *) 0;
}
for (i = 0; i < 4; i++) {
if (!parse_color(argv[i], color[i])) {
error("can't parse color: \"%s\"\n", argv[i]);
return 0;
}
}
cptr = image->data;
for (i = 0; i < height; i++) {
int b = 0xff * i / height;
int t = 0xff - b;
for (j = 0; j < width; j++) {
int r = 0xff * j / width;
int l = 0xff - r;
int f[4];
f[0] = (l * t) >> 8;
f[1] = (r * t) >> 8;
f[2] = (l * b) >> 8;
f[3] = (r * b) >> 8;
for (k = 0; k < 3; k++) {
*cptr++ =
(f[0] * color[0][k] +
f[1] * color[1][k] + f[2] * color[2][k] + f[3] * color[3][k]) >> 8;
}
if (RRGBAFormat == image->format)
cptr++;
}
}
return image;
}