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jpm |
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<?php
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// Vérification de la présence d'un chemin vers l'image
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if($_GET['img'] == '') {
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exit;
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}
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// Récupération de paramêtres
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$_image_ = urldecode( $_GET['img'] );
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$_dossier = dirname($_image_).'/cache/';
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$_fichier = pathinfo($_image_);
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$_fichier['filename'] = trim(basename($_image_, $_fichier['extension']), '.');
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$_width_min_ = intval($_GET['width']);
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$_height_min_ = intval($_GET['height']);
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$_quality_ = intval($_GET['quality']);
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$_centrage = false;
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if (isset($_GET['centrage'])) {
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$_centrage = (bool)$_GET['centrage'];
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}
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// Création du dossier de cache
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if (!is_dir($_dossier)) {
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mkdir($_dossier);
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}
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// Création du nom du fichier de cache
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$fichier_cache = $_dossier.$_fichier['filename'].'_w'.$_width_min_.'_q'.$_quality_.'.'.$_fichier['extension'];
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// Recherche de la présence d'une image en cache ou création de celle-ci
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if (file_exists($fichier_cache)) {
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switch (strtolower($_fichier['extension'])) {
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case 'jpg' :
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header('Content-type: image/jpg');
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Imagejpeg(ImageCreateFromJpeg($fichier_cache));
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break;
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case 'gif' :
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header('Content-type: image/gif');
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Imagegif(ImageCreateFromGif($fichier_cache));
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break;
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case 'png' :
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header('Content-type: image/png');
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Imagepng(ImageCreateFromPng($fichier_cache));
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break;
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}
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} else {
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// Calcul de la hauteur et de la largeur
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$info = getimagesize($_image_);
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if ($info[0] == '') {
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exit();
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}
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$new_w = $_width_min_;
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$new_h = (int)($info[1]*($new_w/$info[0]));
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if(($_height_min_) AND ($new_h > $_height_min_)) {
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$new_h = $_height_min_;
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$new_w = (int)($info[0]*($new_h/$info[1]));
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}
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// Définition des points d'origine de destination
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$dst_x = 0;
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$dst_y = 0;
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$dst_l = $new_w;
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$dst_h = $new_h;
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if ($_centrage != false) {
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$dst_x = (int)(($_width_min_ - $new_w) / 2);
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$dst_y = (int)(($_height_min_ - $new_h) / 2);
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$dst_l = $_width_min_;
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$dst_h = $_height_min_;
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}
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// Création de l'image
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switch (strtolower($_fichier['extension'])) {
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case 'jpg' :
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header("Content-type: image/jpg");
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$dst_img = imagecreatetruecolor($dst_l, $dst_h);
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$c_fond = imagecolorallocate($dst_img, 255, 255, 255);
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imagefill($dst_img, 0, 0, $c_fond);
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$src_img = ImageCreateFromJpeg($_image_);
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imagecopyresampled($dst_img,$src_img,$dst_x,$dst_y,0,0,$new_w,$new_h,ImageSX($src_img),ImageSY($src_img));
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$img_cache = Imagejpeg($dst_img, $fichier_cache, $_quality_);
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$img = Imagejpeg($dst_img, '', $_quality_);
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break;
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case 'gif' :
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header("Content-type: image/gif");
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$dst_img=ImageCreate($new_w,$new_h);
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$src_img=ImageCreateFromGif($_image_);
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ImagePaletteCopy($dst_img,$src_img);
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ImageCopyResized($dst_img,$src_img,$dst_x,$dst_y,0,0,$new_w,$new_h,ImageSX($src_img),ImageSY($src_img));
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$img_cache = Imagegif($dst_img, $fichier_cache, $_quality_);
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$img = Imagegif($dst_img,'', $_quality_);
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break;
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case 'png' :
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header("Content-type: image/png");
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$dst_img=ImageCreate($new_w,$new_h);
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$src_img=ImageCreateFromPng($_image_);
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ImagePaletteCopy($dst_img,$src_img);
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ImageCopyResized($dst_img,$src_img,$dst_x,$dst_y,0,0,$new_w,$new_h,ImageSX($src_img),ImageSY($src_img));
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$img_cache = Imagepng($dst_img, $fichier_cache, $_quality_);
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$img = Imagepng($dst_img,'', $_quality_);
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break;
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}
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}
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?>
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