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Abile® Informatique
Rue Neuve
80650 VIGNACOURT |
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(0) 322 390 333 |
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(0) 322 390 615 |
= $width) ||
($y + $dispy >= $height) ||
($x + $dispx < 0) ||
($y + $dispy < 0))
continue;
$oldcol = imagecolorat($_charsImgHandler, $x, $y);
$newcol = imagecolorat($_charsImgHandler, $x + $dispx, $y + $dispy);
imagesetpixel($_charsImgHandler, $x, $y, $newcol);
imagesetpixel($_charsImgHandler, $x + $dispx, $y + $dispy, $oldcol);
}
}
break;
/* effet de cryptage */
case 1:
$ystop = $height-3;
$y = -1;
while(++$y<$ystop)
{
$j = $y+mt_rand()%3;
$x = -1;
while(++$x<$width)
{
$pixel = @imagecolorat($_charsImgHandler, $x, $y);
$rgb = array( 'red' => ($pixel >> 16) & 0xFF, 'green' => ($pixel >> 8) & 0xFF, 'blue' => $pixel & 0xFF);
$pixel = @imagecolorat($_charsImgHandler, $x, $j);
$rgb2 = array( 'red' => ($pixel >> 16) & 0xFF, 'green' => ($pixel >> 8) & 0xFF, 'blue' => $pixel & 0xFF);
$tmp = $rgb2['red'];
$rgb2['red'] = $rgb['red'];
$rgb['red'] = $tmp;
$tmp = $rgb2['green'];
$rgb2['green'] = $rgb['green'];
$rgb['green'] = $tmp;
$tmp = $rgb2['blue'];
$rgb2['blue'] = $rgb['blue'];
$rgb['blue'] = $tmp;
imagesetpixel($_charsImgHandler,$x,$y,imagecolorallocate($_charsImgHandler,$rgb['red'],$rgb['green'],$rgb['blue']));
imagesetpixel($_charsImgHandler,$x,$j,imagecolorallocate($_charsImgHandler,$rgb2['red'],$rgb2['green'],$rgb2['blue']));
}
}
break;
/* vagues horizontales */
case 2:
$_tempImg = imagecreatetruecolor($width,$height);
imagefill($_tempImg,0,0,$white);
$up = true;
$offset = 0;
$stop = $width-3;
for($y=0;$y<$height;++$y)
{
if($up === true)
$offset++;
else
$offset--;
for($x=3;$x<$stop;++$x)
{
$color = @imagecolorat($_charsImgHandler, $x, $y);
imagesetpixel($_tempImg,$x+$offset,$y, $color ? $color : $white);
}
if($offset === 3)
$up = false;
elseif(empty($offset))
$up = true;
}
imagedestroy($_charsImgHandler);
$_charsImgHandler = $_tempImg;
break;
/* vagues verticales */
case 3:
$_tempImg = imagecreatetruecolor($width,$height);
imagefill($_tempImg,0,0,$white);
$up = true;
$offset = 0;
$stop = $height-3;
for($x=0;$x<$width;++$x)
{
if($up === true)
$offset++;
else
$offset--;
for($y=3;$y<$stop;++$y)
{
$color = @imagecolorat($_charsImgHandler, $x+$offset, $y);
imagesetpixel($_tempImg,$x,$y, $color ? $color : $white);
}
if($offset === 3)
$up = false;
elseif(empty($offset))
$up = true;
}
imagedestroy($_charsImgHandler);
$_charsImgHandler = $_tempImg;
break;
/* effet fish eye */
default:
$_tempImg = imagecreatetruecolor($width,$height);
imageFill($_tempImg,0,0,$white);
$xmid = (int)($width/2);
$ymid = (int)($height/2);
$start = (int)sqrt((float)($xmid*$xmid+$ymid*$ymid));
$x = -1;
while(++$x<$width)
{
$y = -1;
while(++$y<$height)
{
$nx = $xmid-$x;
$ny = $ymid-$y;
$radius = sqrt((float)($nx*$nx+$ny*$ny));
if($radius < $start)
{
$angle = atan2((double)$ny,(double)$nx);
$rnew = ($radius*$radius/$start);
$nx = $xmid + (int)($rnew * cos($angle));
$ny = $y;
$nx = max(0,min($nx,$width));
$ny = max(0,min($ny,$height));
if(false === ($color = @imagecolorat($_charsImgHandler, $nx, $ny)))
$color = $white;
}
else $color = $white;
imagesetpixel($_tempImg, $x, $y, $color);
}
}
imagedestroy($_charsImgHandler);
$_charsImgHandler = imagecreatetruecolor($width, $height);
for ($x=0;$x<$width;$x++)
imagecopy($_charsImgHandler,$_tempImg, $x, 0, $width - $x - 1, 0, 1, $height);
imagedestroy($_tempImg);
}
if($addBlur === true)
{
if($blurLevel < 1)
$blurLevel = 1;
elseif($blurLevel > 10)
$blurLevel = 10;
$coeffs = array (
array ( 1),
array ( 1, 1),
array ( 1, 2, 1),
array ( 1, 3, 3, 1),
array ( 1, 4, 6, 4, 1),
array ( 1, 5, 10, 10, 5, 1),
array ( 1, 6, 15, 20, 15, 6, 1),
array ( 1, 7, 21, 35, 35, 21, 7, 1),
array ( 1, 8, 28, 56, 70, 56, 28, 8, 1),
array ( 1, 9, 36, 84, 126, 126, 84, 36, 9, 1),
array ( 1, 10, 45, 120, 210, 252, 210, 120, 45, 10, 1)
);
$sum = pow(2, $blurLevel);
$temp1 = imagecreatetruecolor($width, $height);
$temp2 = imagecreatetruecolor($width, $height);
imagecopy($temp2,$_charsImgHandler,0,0,0,0,$width,$height);
$y = -1;
while(++$y<=$height)
{
$x = -1;
while(++$x<=$width)
{
$sumr = 0;
$sumg = 0;
$sumb = 0;
$k = -1;
while(++$k<=$blurLevel)
{
$color = @imagecolorat($_charsImgHandler,($x-(($blurLevel)/2)+$k), $y);
$sumr += (($color >> 16) & 0xFF) * $coeffs[$blurLevel][$k];
$sumg += (($color >> 8) & 0xFF) * $coeffs[$blurLevel][$k];
$sumb += ($color & 0xFF) * $coeffs[$blurLevel][$k];
}
$color = imagecolorallocate ($temp1,($sumr/$sum),($sumg/$sum),($sumb/$sum));
imagesetpixel($temp1,$x,$y,$color);
}
}
imagedestroy($_charsImgHandler);
$_charsImgHandler = $temp2;
for($x=0;$x<$width;++$x)
{
for($y=0;$y<$height;++$y)
{
$sumr=0; $sumg=0; $sumb=0;
for($k=0;$k<=$blurLevel;++$k)
{
$color = @imagecolorat($temp1, $x,($y-(($blurLevel)/2)+$k));
$sumr += (($color >> 16) & 0xFF) * $coeffs[$blurLevel][$k];
$sumg += (($color >> 8) & 0xFF) * $coeffs[$blurLevel][$k];
$sumb += ($color & 0xFF) * $coeffs[$blurLevel][$k];
}
$color = imagecolorallocate ($_charsImgHandler,($sumr/$sum),($sumg/$sum),($sumb/$sum));
imagesetpixel($_charsImgHandler,$x,$y,$color);
}
}
imagedestroy($temp1);
}
// on rend transparent le fond de l'image contenant les caractères
imagecolortransparent($_charsImgHandler,$white);
// création image de fond
$_bgImgHandler = imagecreatetruecolor($width,$height);
imagefill($_bgImgHandler, 0, 0,$white);
// choix de la couleur des lignes et du type de quadrillage
$line = imagecolorallocate($_bgImgHandler,mt_rand(200,230),mt_rand(200,230),mt_rand(200,230));
$lineType = mt_rand(0,11);
switch($lineType)
{
/* Lignes et grilles "normales" */
case 0:
case 1:
case 2:
if($lineType !== 0) // ligne horizontales ou grille
{
for($y=0;$y<$height;$y+=5)
imageline( $_bgImgHandler, 0, $y, $width, $y,$line);
}
if($lineType !== 1) // ligne verticales ou grille
{
for($y=0;$y<$width;$y+=5)
imageline( $_bgImgHandler, $y, 0, $y, $width, $line);
}
break;
/* éventails */
case 3:
case 4:
case 5:
if($lineType !== 3) // eventail horizontal ou en grille
{
for($y=0,$z=0; $y<$width; ++$y,$z+=5)
imageline( $_bgImgHandler, $width*2, 0, 0, $z, $line);
}
if($lineType !== 4) // eventail vertical ou en grille
{
for($y=0,$z=0; $y<$height; ++$y,$z+=5)
imageline( $_bgImgHandler, 0, $width, $z, 0, $line);
}
break;
/* effet "matrix" */
case 6:
for($x=0;$x<$width;$x+=mt_rand(1,4))
{
for($y=0;$y<$height;$y+=mt_rand(1,4))
imagesetpixel( $_charsImgHandler, $x, $y, $line);
}
break;
/* grille de points */
case 7:
for($x=0;$x<$width;$x+=2)
{
for($y=0;$y<$height;$y+=2)
imagesetpixel( $_charsImgHandler, $x, $y, $line);
}
break;
/* autre grille de points */
case 8:
for($x=0;$x<$width;$x+=3)
{
for($y=0;$y<$height;$y+=2)
imagesetpixel( $_charsImgHandler, $x, $y, $line);
}
break;
/* vaguelettes horizontales */
case 9:
$up = true;
$offset = 0;
for($y=0;$y<$height;$y+=5)
{
for($x=0;$x<$width;++$x)
{
if($up === true)
$offset++;
else
$offset--;
imagesetpixel( $_bgImgHandler, $x, $y+$offset, $line);
if($offset === 3)
$up = false;
elseif(empty($offset))
$up = true;
}
}
break;
/* vaguelettes verticales */
case 10:
$up = true;
$offset = 0;
for($x=0;$x<$width;$x+=5)
{
for($y=0;$y<$height;++$y)
{
if($up === true)
$offset++;
else
$offset--;
imagesetpixel( $_bgImgHandler, $x+$offset, $y, $line);
if($offset === 3)
$up = false;
elseif(empty($offset))
$up = true;
}
}
break;
/* grille irrégulière */
default:
for($y=0;$y<$height;$y+=mt_rand(2,5))
imageline( $_bgImgHandler, 0, $y, $width, $y,$line);
for($y=0;$y<$width;$y+=mt_rand(2,5))
imageline( $_bgImgHandler, $y, 0, $y, $width, $line);
}
// fusion du code et du fond
imagecopymerge($_bgImgHandler, $_charsImgHandler, 0, 0, 0, 0, $width, $height,100);
imagedestroy($_charsImgHandler);
// on affiche
header('Pragma: no-cache');
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Cache-Control: private',false);
header ('Content-type: image/gif');
imagegif($_bgImgHandler);
}
?>
