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/*
*
* This file is part of the XForms library package.
*
* XForms is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1, or
* (at your option) any later version.
*
* XForms 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with XForms; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
*/
/*
* $Id: image_replace.c,v 1.0 2002/05/08 05:16:30 zhao Release $
*
*.
* This file is part of the XForms library package.
* Copyright (c) 1998-2002 T.C. Zhao
* All rights reserved.
*.
*
*
* replace a specific pixel
*/
#include "forms.h"
#include "flimage.h"
#include "flimage_int.h"
/* replace all color target with color repl */
int
flimage_replace_pixel(FL_IMAGE * im, unsigned int target, unsigned int repl)
{
int n, r1, g1, b1, r2, g2, b2;
int tmp;
if (!im || im->w <= 0)
return -1;
FL_UNPACK(target, r1, g1, b1);
FL_UNPACK(repl, r2, g2, b2);
flimage_invalidate_pixels(im);
if (im->type == FL_IMAGE_RGB)
{
unsigned char *red = im->red[0];
unsigned char *green = im->green[0];
unsigned char *blue = im->blue[0];
for (n = im->w * im->h; --n >= 0;)
{
tmp = FL_PACK(red[n], green[n], blue[n]);
if (tmp == target)
{
red[n] = r2;
green[n] = g2;
blue[n] = b2;
}
}
}
else if (im->type == FL_IMAGE_PACKED)
{
unsigned int *packed = im->packed[0];
for (n = im->w * im->h; --n >= 0;)
{
if (packed[n] == target)
packed[n] = repl;
}
}
else if (FL_IsGray(im->type))
{
unsigned short *gray = im->gray[0];
unsigned short gray1 = FL_RGB2GRAY(r1, g1, b1);
unsigned short gray2 = FL_RGB2GRAY(r2, g2, b2);
for (n = im->w * im->h; --n >= 0;)
{
if (gray[n] == gray1)
gray[n] = gray2;
}
}
else if (FL_IsCI(im->type))
{
unsigned short *ci = im->ci[0];
unsigned short c1 = flimage_get_closest_color_from_map(im, target);
unsigned short c2 = flimage_get_closest_color_from_map(im, repl);
for (n = im->w * im->h; --n >= 0;)
{
if (ci[n] == c1)
ci[n] = c2;
}
}
else
{
M_err("ReplaceColor", "InternalError: bad type %d", im->type);
return -1;
}
im->modified = 1;
return 0;
}
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