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<?php |
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/** |
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* @copyright Bluz PHP Team |
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* @link https://github.com/bluzphp/skeleton |
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*/ |
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/** |
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* @namespace |
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*/ |
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namespace Image; |
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/** |
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* Wrapper over Gd for support some Imagick functions |
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* |
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* @category Application |
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* @package Library |
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*/ |
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class Gd |
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{ |
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/** |
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* @var string |
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*/ |
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protected $file; |
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/** |
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* @var resource |
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*/ |
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protected $image; |
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/** |
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* @var integer |
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*/ |
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protected $width; |
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/** |
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* @var integer |
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*/ |
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protected $height; |
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/** |
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* Compression quality for JPEG |
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* |
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* @var integer |
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*/ |
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protected $quality = 86; |
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/** |
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* Constructor of Gd |
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* |
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* @param string $file |
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* |
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* @throws Exception |
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*/ |
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public function __construct($file) |
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{ |
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if (!file_exists($file)) { |
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throw new Exception("Image `$file` file not found"); |
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} |
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$this->file = $file; |
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// Retrieve image information |
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[$this->width, $this->height, $type] = getimagesize($file); |
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// Check support of file type |
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if (!(imagetypes() & $type)) { |
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throw new Exception("Server does not support `$type` image type"); |
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} |
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// Using imagecreatefromstring will automatically detect the file type |
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$this->image = imagecreatefromstring(file_get_contents($file)); |
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if (!$this->image) { |
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throw new Exception('Could not load image'); |
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} |
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} |
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/** |
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* @param integer $quality |
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* |
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* @return void |
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*/ |
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public function setImageCompressionQuality($quality): void |
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{ |
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$this->quality = $quality; |
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} |
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/** |
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* Create a crop thumbnail image from source image |
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* cropped by smaller side |
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* |
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* @param integer $width |
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* @param integer $height |
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* |
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* @return bool |
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*/ |
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public function cropThumbnailImage($width, $height): bool |
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{ |
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// Compare image size with required thumbnail size |
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if (($this->width < $width) && |
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($this->height < $height) |
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) { |
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return true; |
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} |
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$widthScale = round($this->width / $width); |
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$heightScale = round($this->height / $height); |
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if ($heightScale < $widthScale) { |
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// Crop width |
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$cropWidth = $heightScale * $width; |
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$cropHeight = $this->height; |
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$srcX = round(($this->width - $cropWidth) / 2); |
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$srcY = 0; |
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} else { |
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// Crop height |
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$cropWidth = $this->width; |
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$cropHeight = $widthScale * $height; |
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$srcX = 0; |
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$srcY = round(($this->height - $cropHeight) / 2); |
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} |
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$thumb = imagecreatetruecolor($width, $height); |
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// Copy resampled makes a smooth thumbnail |
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imagecopyresampled($thumb, $this->image, 0, 0, $srcX, $srcY, $width, $height, $cropWidth, $cropHeight); |
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imagedestroy($this->image); |
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$this->width = $width; |
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$this->height = $height; |
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$this->image = $thumb; |
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return $thumb ? true : false; |
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} |
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/** |
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* Save the image to a file. Type is determined from the extension |
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* |
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* @param string $fileName |
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* |
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* @return bool |
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*/ |
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public function writeImage($fileName): bool |
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{ |
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if (!$this->image || file_exists($fileName)) { |
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return false; |
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} |
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$ext = strtolower(substr($fileName, strrpos($fileName, '.'))); |
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switch ($ext) { |
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case '.gif': |
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return imagegif($this->image, $fileName); |
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// break |
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case '.jpg': |
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case '.jpeg': |
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return imagejpeg($this->image, $fileName, $this->quality); |
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// break |
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case '.png': |
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return imagepng($this->image, $fileName); |
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// break |
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case '.bmp': |
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return imagewbmp($this->image, $fileName); |
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// break |
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default: |
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return false; |
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} |
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} |
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/** |
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* Destroy image source |
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*/ |
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public function __destruct() |
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{ |
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imagedestroy($this->image); |
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} |
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} |
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bluzphp /
skeleton
This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.