79 lines
2.1 KiB
PHP
79 lines
2.1 KiB
PHP
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<?php
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class thumb {
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protected string $imagedir;
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protected string $thumbdir;
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protected int $w = 200;
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protected int $h = 200;
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const IMAGE_HANDLERS = [
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IMAGETYPE_JPEG => [
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'load' => 'imagecreatefromjpeg',
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'save' => 'imagejpeg',
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'quality' => 100
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],
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IMAGETYPE_PNG => [
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'load' => 'imagecreatefrompng',
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'save' => 'imagepng',
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'quality' => 0
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],
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IMAGETYPE_GIF => [
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'load' => 'imagecreatefromgif',
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'save' => 'imagegif',
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'quality' => 0
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],
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IMAGETYPE_WEBP => [
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'load' => 'imagecreatefromwebp',
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'save' => 'imagecreatewebp',
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'quality' => 90
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]
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];
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public function __construct($idir, $tdir, $width, $heigth) {
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$this->imagedir = $idir;
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$this->thumbdir = $tdir;
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$this->w = $width;
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$this->h = $heigth;
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}
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public function get_thumb($iname) {
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$src = $this->imagedir.$iname;
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$ext = pathinfo($iname, PATHINFO_EXTENSION);
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$dstname = hash('sha256', $iname);
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$dstpath = $this->thumbdir.$dstname.'.'.$ext;
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if (!file_exists($dstpath)) {
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$type = exif_imagetype($src);
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$image = call_user_func(self::IMAGE_HANDLERS[$type]['load'], $src);
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$srcwidth = imagesx($image);
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$srcheight = imagesy($image);
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$ratio = min($this->w / $srcwidth, $this->h / $srcheight);
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$width = round($srcwidth*$ratio);
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$height = round($srcheight*$ratio);
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$thumbnail = imagecreatetruecolor($width, $height);
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if ($type == IMAGETYPE_GIF || $type == IMAGETYPE_PNG) {
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imagecolortransparent($thumbnail, imagecolorallocate($thumbnail, 0, 0, 0));
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if ($type == IMAGETYPE_PNG) {
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imagealphablending($thumbnail, false);
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imagesavealpha($thumbnail, true);
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}
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}
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imagecopyresampled($thumbnail, $image, 0, 0, 0, 0, $width, $height, $srcwidth, $srcheight);
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call_user_func(self::IMAGE_HANDLERS[$type]['save'],$thumbnail,$dstpath,self::IMAGE_HANDLERS[$type]['quality']);
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imagedestroy($image);
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imagedestroy($thumbnail);
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}
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return $dstname.'.'.$ext;
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}
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}
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?>
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