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|
<?php
// function de création d'image
$url = htmlspecialchars (htmlentities ($_GET['uri'])); //RECUPERE L'ID DE L'ARTICLE EN GET
/* VERIFICATION PHOTO */
$je_recherche_dans_le_dossier = $url;
// Si la photo existe
if(is_file($je_recherche_dans_le_dossier)) {
if (@file_exists($je_recherche_dans_le_dossier)) {
$url = htmlspecialchars (htmlentities ($_GET['uri'])); //RECUPERE L'ID DE L'ARTICLE EN GET
} else {
$url = 'http://'.$_SERVER['HTTP_HOST'].'/ressources/medias/noimage/noimage.jpg';
}
}
else {
$url = 'http://'.$_SERVER['HTTP_HOST'].'/ressources/medias/noimage/noimage.jpg';
}
$url_formate = substr($url, (strrpos($url, '/') + 1)); // formattage de l'url
$width = htmlspecialchars (htmlentities ($_GET['w'])); //RECUPERE L'ID DE L'ARTICLE EN GET
$height = htmlspecialchars (htmlentities ($_GET['h'])); //RECUPERE L'ID DE L'ARTICLE EN GET
$rep = "_cache/";
$filename = $rep.$width."_".$url_formate;
if (!file_exists($filename)) {
if(!function_exists("create_square_image")){
function create_square_image($original_file, $destination_file=NULL, $square_size = 96){
if(isset($destination_file) and $destination_file!=NULL){
if(!is_writable($destination_file)){
//echo '<p style="color:#FF0000">Le dossier cache n\'est pas accessible en écriture</p>';
}
}
// get width and height of original image
$imagedata = getimagesize($original_file);
$original_width = $imagedata[0];
$original_height = $imagedata[1];
if($original_width > $original_height){
$new_height = $square_size;
$new_width = $new_height*($original_width/$original_height);
}
if($original_height > $original_width){
$new_width = $square_size;
$new_height = $new_width*($original_height/$original_width);
}
if($original_height == $original_width){
$new_width = $square_size;
$new_height = $square_size;
}
$new_width = round($new_width);
$new_height = round($new_height);
// load the image
if(substr_count(strtolower($original_file), ".jpg") or substr_count(strtolower($original_file), ".jpeg")){
$original_image = imagecreatefromjpeg($original_file);
}
if(substr_count(strtolower($original_file), ".gif")){
$original_image = imagecreatefromgif($original_file);
}
if(substr_count(strtolower($original_file), ".png")){
$original_image = imagecreatefrompng($original_file);
}
$smaller_image = imagecreatetruecolor($new_width, $new_height);
$square_image = imagecreatetruecolor($square_size, $square_size);
imagecopyresampled($smaller_image, $original_image, 0, 0, 0, 0, $new_width, $new_height, $original_width, $original_height);
if($new_width>$new_height){
$difference = $new_width-$new_height;
$half_difference = round($difference/2);
imagecopyresampled($square_image, $smaller_image, 0-$half_difference+1, 0, 0, 0, $square_size+$difference, $square_size, $new_width, $new_height);
}
if($new_height>$new_width){
$difference = $new_height-$new_width;
$half_difference = round($difference/2);
imagecopyresampled($square_image, $smaller_image, 0, 0-$half_difference+1, 0, 0, $square_size, $square_size+$difference, $new_width, $new_height);
}
if($new_height == $new_width){
imagecopyresampled($square_image, $smaller_image, 0, 0, 0, 0, $square_size, $square_size, $new_width, $new_height);
}
// if no destination file was given then display a png
if(!$destination_file){
imagepng($square_image,NULL,9);
}
// save the smaller image FILE if destination file given
if(substr_count(strtolower($destination_file), ".jpg")){
imagejpeg($square_image,$destination_file,100);
}
if(substr_count(strtolower($destination_file), ".gif")){
imagegif($square_image,$destination_file);
}
if(substr_count(strtolower($destination_file), ".png")){
imagepng($square_image,$destination_file,9);
}
imagedestroy($original_image);
imagedestroy($smaller_image);
imagedestroy($square_image);
}
}
create_square_image($url,$rep.$width."_".$url_formate,$width);
}
// Get actual size of source image
$imgInfo = getimagesize($rep.$width."_".$url_formate) or die("Unable to open '$uri'");
$srcType = $imgInfo[2];
switch($srcType) {
case 1 : $srcType = "gif"; break;
case 2 : $srcType = "jpeg"; break;
case 3 : $srcType = "png"; break;
default: $srcType = "???";
}
header("Content-Type:image/".$srcType."");
readfile($rep.$width."_".$url_formate) or diewith("Unable to open cached thumb '$cacheFile'");
?> |
[GD] Miniature en cache d'image PNG avec transparence
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