mirror of
https://github.com/gryf/wmaker.git
synced 2025-12-19 20:38:08 +01:00
86 lines
1.9 KiB
C
86 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;
|
|
}
|
|
|