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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. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This file is part of the XForms library package.
* Copyright (c) 1998-2002 T.C. Zhao
* All rights reserved.
*
* replace a specific pixel
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "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;
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; )
{
if ( ( int ) target == FL_PACK( red[ n ], green[ n ], blue[ n ] ) )
{
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;
}
/*
* Local variables:
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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