Miniature des images vectorielles
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core/core.php
148
core/core.php
@ -1243,66 +1243,94 @@ class common
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}
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/*
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* Création d'une miniature
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* Fonction utilisée lors de la mise à jour d'une version 9 à une version 10
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* @param string $src image source
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* @param string $dets image destination
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* @param integer $desired_width largeur demandée
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*/
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function makeThumb($src, $dest, $desired_width)
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{
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// Vérifier l'existence du dossier de destination.
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$fileInfo = pathinfo($dest);
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if (!is_dir($fileInfo['dirname'])) {
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mkdir($fileInfo['dirname'], 0755, true);
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}
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$source_image = '';
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// Type d'image
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switch ($fileInfo['extension']) {
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case 'jpeg':
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case 'jpg':
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$source_image = imagecreatefromjpeg($src);
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break;
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case 'png':
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$source_image = imagecreatefrompng($src);
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break;
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case 'gif':
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$source_image = imagecreatefromgif($src);
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break;
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case 'webp':
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$source_image = imagecreatefromwebp($src);
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break;
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case 'avif':
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$source_image = imagecreatefromavif($src);
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}
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// Image valide
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if (is_object($source_image)) {
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$width = imagesx($source_image);
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$height = imagesy($source_image);
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/* find the "desired height" of this thumbnail, relative to the desired width */
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$desired_height = floor($height * ($desired_width / $width));
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/* create a new, "virtual" image */
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$virtual_image = imagecreatetruecolor($desired_width, $desired_height);
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/* copy source image at a resized size */
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imagecopyresampled($virtual_image, $source_image, 0, 0, 0, 0, $desired_width, $desired_height, $width, $height);
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switch (mime_content_type($src)) {
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case 'image/jpeg':
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case 'image/jpg':
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return (imagejpeg($virtual_image, $dest));
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case 'image/png':
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return (imagepng($virtual_image, $dest));
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case 'image/gif':
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return (imagegif($virtual_image, $dest));
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case 'image/webp':
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return (imagewebp($virtual_image, $dest));
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case 'image/avif':
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return (imageavif($virtual_image, $dest));
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}
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} else {
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return (false);
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}
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}
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/**
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* Crée une miniature à partir d'une image source.
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* Cette fonction prend en charge les formats raster (JPEG, PNG, GIF, WebP, AVIF) et vectoriels (SVG).
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* Pour les images vectorielles (SVG), aucune redimension n'est effectuée : une copie est réalisée.
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*
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* @param string $src Chemin de l'image source.
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* @param string $dest Chemin de l'image destination (avec le nom du fichier et l'extension).
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* @param int $desired_width Largeur demandée pour la miniature (ignorée pour les SVG).
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* @return bool True si l'opération a réussi, false sinon.
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*/
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function makeThumb($src, $dest, $desired_width)
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{
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// Vérifier l'existence du dossier de destination.
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$fileInfo = pathinfo($dest);
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if (!is_dir($fileInfo['dirname'])) {
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mkdir($fileInfo['dirname'], 0755, true);
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}
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$extension = strtolower($fileInfo['extension']);
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$mime_type = mime_content_type($src);
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// Gestion des fichiers SVG (copie simple sans redimensionnement)
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if ($extension === 'svg' || $mime_type === 'image/svg+xml') {
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return copy($src, $dest);
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}
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// Chargement de l'image source selon le type
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$source_image = '';
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switch ($extension) {
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case 'jpeg':
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case 'jpg':
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$source_image = imagecreatefromjpeg($src);
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break;
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case 'png':
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$source_image = imagecreatefrompng($src);
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break;
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case 'gif':
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$source_image = imagecreatefromgif($src);
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break;
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case 'webp':
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$source_image = imagecreatefromwebp($src);
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break;
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case 'avif':
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if (function_exists('imagecreatefromavif')) {
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$source_image = imagecreatefromavif($src);
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} else {
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return false; // AVIF non supporté
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}
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break;
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default:
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return false; // Format non pris en charge
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}
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// Image valide (formats raster uniquement)
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if (is_resource($source_image) || (is_object($source_image) && $source_image instanceof GdImage)) {
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$width = imagesx($source_image);
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$height = imagesy($source_image);
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// Calcul de la hauteur proportionnelle à la largeur demandée
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$desired_height = floor($height * ($desired_width / $width));
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// Création d'une nouvelle image virtuelle redimensionnée
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$virtual_image = imagecreatetruecolor($desired_width, $desired_height);
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// Copie de l'image source dans l'image virtuelle avec redimensionnement
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imagecopyresampled($virtual_image, $source_image, 0, 0, 0, 0, $desired_width, $desired_height, $width, $height);
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// Enregistrement de l'image redimensionnée au format approprié
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switch ($mime_type) {
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case 'image/jpeg':
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case 'image/jpg':
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return imagejpeg($virtual_image, $dest);
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case 'image/png':
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return imagepng($virtual_image, $dest);
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case 'image/gif':
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return imagegif($virtual_image, $dest);
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case 'image/webp':
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return imagewebp($virtual_image, $dest);
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case 'image/avif':
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if (function_exists('imageavif')) {
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return imageavif($virtual_image, $dest);
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}
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}
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}
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return false; // En cas d'échec
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}
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/**
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