townsymbol.php

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<?php
/***************************************************************************
 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.
 ***************************************************************************/

function ImageColorAllocateHEX ( $im, $s )
{
    $s = str_replace('#', '', $s );
    $bg_dec = hexdec( $s );
    return imagecolorallocate ( $im,
                ($bg_dec & 0xFF0000) >> 16,
                ($bg_dec & 0x00FF00) >>  8,
                ($bg_dec & 0x0000FF)
                );
}

$strColor = $_GET['color'];
$img = imagecreatefrompng( 'img/karteimg.png' );
$colorcode = ImageColorAllocateHEX ( $img, $strColor );
// FIXME: Bildfarbe setzen (müsste bessere Variante geben, aber imagefill ging nicht, wegen Transparenz)
for ( $x = 0; $x < 9; $x++ )
{
    for ( $y = 0; $y < 9; $y++ )
    {
        $getColor = imagecolorat( $img, $x, $y );
        if ( ( $getColor != 0 ) && ( $getColor != 1 ) )
        {
            imagesetpixel( $img, $x, $y, $colorcode );
        }
    }
}

header( "Content-type: image/png" );
imagepng ( $img );
imagedestroy ( $img );

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