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| <?php
$dossier = 'philtre/';
$newfichier = 'noirblanc.bmp';
class Bmp32BitsCarib0uClass {
private $filename = 'upload/image.bmp';
private $handle = null;
private $infos = array();
function __construct($name) {
$this->filename = $name;
if($this->is_bmp()) {
$this->infos['taille'] = $this->reading_val(4);
fseek($this->handle,4,SEEK_CUR);
$this->infos['offset'] = $this->reading_val(4);
fseek($this->handle,4,SEEK_CUR);
$this->infos['largeur'] = $this->reading_val(4);
$this->infos['longueur'] = $this->reading_val(4);
} else return false;
}
private function is_bmp() {
$this->handle = @fopen($this->filename,"rb+");
if(!$this->handle) return false;
$header = fread($this->handle,2);
return $header == "\x42\x4d" ? true : false;
}
public function dump() {
echo "Taille : ".$this->infos['taille']." octets.\n".
"Offset : ".$this->infos['offset']."\n".
"Largeur : ".$this->infos['largeur']." octets\n".
"Longueur : ".$this->infos['longueur']." octets.\n";
}
private function reading_val($n,$mode = '') {
$len = fread($this->handle,$n);
$o = '';
for($i = strlen($len) - 1; $i >= 0; $i--) {
if(ord($len[$i]) <= 0x0f) {
$o .= '0'.dechex(ord($len[$i]));
} else {
$o .= dechex(ord($len[$i]));
}
}
if(!$mode) {
return hexdec($o);
} else if($mode = "hex") {
return $o;
}
}
public function RemplissageAleatoire() {
for($i = 0; $i <= $this->GetLongueur(); $i++) {
for($j = 0; $j <= $this->GetLargeur(); $j++) {
$color = dechex(mt_rand(16,255)) . dechex(mt_rand(16,255)) . dechex(mt_rand(16,255));
$this->SetPixel($j,$i,$color);
}
}
}
public function LirePixel($x,$y) {
if($x <= $this->infos['largeur'] && $y <= $this->infos['longueur']) {
rewind($this->handle);
$offimg = ($this->infos['largeur'] * $y * 3) + ($x * 3) + ($y * ($this->infos['largeur'] % 4));
fseek($this->handle, $this->infos['offset'] + $offimg);
return $this->reading_val(3,"hex");
}
}
public function SetPixel($x,$y,$color) {
if($x <= $this->infos['largeur'] && $y <= $this->infos['longueur']) {
rewind($this->handle);
$offimg = ($this->infos['largeur'] * $y * 3) + ($x * 3) + ($y * ($this->infos['largeur'] % 4));
fseek($this->handle, $this->infos['offset'] + $offimg);
$rouge = chr(hexdec(substr($color,0,2)));
$vert = chr(hexdec(substr($color,2,2)));
$bleu = chr(hexdec(substr($color,4,2)));
fwrite($this->handle,$bleu);
fwrite($this->handle,$vert);
fwrite($this->handle,$rouge);
}
}
public function GetLongueur() {
if(!empty($this->infos['longueur'])) return $this->infos['longueur'];
else return 0;
}
public function GetLargeur() {
if(!empty($this->infos['largeur'])) return $this->infos['largeur'];
else return 0;
}
public function RemplissageTotal($color) {
for($i = 0; $i <= $this->GetLongueur(); $i++) {
for($j = 0; $j <= $this->GetLargeur(); $j++) {
$this->SetPixel($j,$i,$color);
}
}
}
public function NoirEtBlanc($output) {
copy($this->filename,$output);
$img2 = new Bmp32BitsCarib0uClass($output);
for($i = 0; $i <= $this->GetLongueur(); $i++) {
for($j = 0; $j <= $this->GetLargeur(); $j++) {
$color = $this->LirePixel($j,$i);
$bleu = hexdec(substr($color,0,2));
$vert = hexdec(substr($color,2,2));
$rouge = hexdec(substr($color,4,2));
$somme = $bleu + $vert + $rouge;
$ncolor = ceil($somme / 3);
if($ncolor <= 0x0f) {
$ncolor = '0'.dechex($ncolor).'0'.dechex($ncolor).'0'.dechex($ncolor);
} else {
$ncolor = dechex($ncolor).dechex($ncolor).dechex($ncolor);
}
$img2->SetPixel($j,$i,$ncolor);
}
}
}
NoirEtBlanc($output);
if(move_uploaded_file($img2, $dossier . $filename)) //Si la fonction renvoie TRUE, c'est que ça a fonctionné...
{ echo 'Modifications effectué avec succès !';
rename($dossier.$filename,$dossier.$newfichier);
}
else //Sinon (la fonction renvoie FALSE).
{
echo 'Echec de la modification !';
}
}
?> |
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