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<?php |
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/* |
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* This file is part of Jitamin. |
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* |
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* Copyright (C) Jitamin Team |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Jitamin\Foundation; |
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/** |
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* Thumbnail Generator. |
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*/ |
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class Thumbnail |
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{ |
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protected $metadata = []; |
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protected $srcImage; |
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protected $dstImage; |
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/** |
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* Create a thumbnail from a local file. |
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* |
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* @static |
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* |
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* @param string $filename |
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* |
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* @return Thumbnail |
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*/ |
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public static function createFromFile($filename) |
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{ |
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$self = new static(); |
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$self->fromFile($filename); |
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return $self; |
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} |
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/** |
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* Create a thumbnail from a string. |
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* |
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* @static |
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* |
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* @param string $blob |
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* |
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* @return Thumbnail |
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*/ |
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public static function createFromString($blob) |
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{ |
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$self = new static(); |
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$self->fromString($blob); |
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return $self; |
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} |
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/** |
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* Load the local image file in memory with GD. |
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* |
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* @param string $filename |
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* |
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* @return Thumbnail |
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*/ |
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public function fromFile($filename) |
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{ |
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$this->metadata = getimagesize($filename); |
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$this->srcImage = imagecreatefromstring(file_get_contents($filename)); |
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return $this; |
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} |
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/** |
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* Load the image blob in memory with GD. |
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* |
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* @param string $blob |
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* |
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* @return Thumbnail |
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*/ |
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public function fromString($blob) |
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{ |
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if (!function_exists('getimagesizefromstring')) { |
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$uri = 'data://application/octet-stream;base64,'.base64_encode($blob); |
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$this->metadata = getimagesize($uri); |
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} else { |
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$this->metadata = getimagesizefromstring($blob); |
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} |
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$this->srcImage = imagecreatefromstring($blob); |
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return $this; |
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} |
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/** |
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* Resize the image. |
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* |
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* @param int $width |
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* @param int $height |
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* |
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* @return Thumbnail |
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*/ |
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public function resize($width = 250, $height = 100) |
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{ |
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$srcWidth = $this->metadata[0]; |
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$srcHeight = $this->metadata[1]; |
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$dstX = 0; |
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$dstY = 0; |
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if ($width == 0 && $height == 0) { |
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$width = 100; |
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$height = 100; |
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} |
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if ($width > 0 && $height == 0) { |
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$dstWidth = $width; |
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$dstHeight = floor($srcHeight * ($width / $srcWidth)); |
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$this->dstImage = imagecreatetruecolor($dstWidth, $dstHeight); |
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} elseif ($width == 0 && $height > 0) { |
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$dstWidth = floor($srcWidth * ($height / $srcHeight)); |
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$dstHeight = $height; |
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$this->dstImage = imagecreatetruecolor($dstWidth, $dstHeight); |
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} else { |
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$srcRatio = $srcWidth / $srcHeight; |
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$resizeRatio = $width / $height; |
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if ($srcRatio <= $resizeRatio) { |
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$dstWidth = $width; |
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$dstHeight = floor($srcHeight * ($width / $srcWidth)); |
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$dstY = ($dstHeight - $height) / 2 * (-1); |
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} else { |
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$dstWidth = floor($srcWidth * ($height / $srcHeight)); |
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$dstHeight = $height; |
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$dstX = ($dstWidth - $width) / 2 * (-1); |
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} |
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$this->dstImage = imagecreatetruecolor($width, $height); |
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} |
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imagecopyresampled($this->dstImage, $this->srcImage, $dstX, $dstY, 0, 0, $dstWidth, $dstHeight, $srcWidth, $srcHeight); |
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return $this; |
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} |
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/** |
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* Save the thumbnail to a local file. |
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* |
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* @param string $filename |
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* |
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* @return Thumbnail |
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*/ |
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public function toFile($filename) |
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{ |
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imagejpeg($this->dstImage, $filename); |
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imagedestroy($this->dstImage); |
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imagedestroy($this->srcImage); |
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return $this; |
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} |
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/** |
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* Return the thumbnail as a string. |
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* |
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* @return string |
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*/ |
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public function toString() |
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{ |
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ob_start(); |
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imagejpeg($this->dstImage, null); |
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imagedestroy($this->dstImage); |
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imagedestroy($this->srcImage); |
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return ob_get_clean(); |
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} |
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/** |
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* Output the thumbnail directly to the browser or stdout. |
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*/ |
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public function toOutput() |
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{ |
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imagejpeg($this->dstImage, null); |
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imagedestroy($this->dstImage); |
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imagedestroy($this->srcImage); |
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} |
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} |
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Jitamin /
jitamin
