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<?php |
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|
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namespace Intervention\Image\Gd; |
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|
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use Intervention\Image\Exception\NotSupportedException; |
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use Intervention\Image\Image; |
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|
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class Driver extends \Intervention\Image\AbstractDriver |
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{ |
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/** |
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* Creates new instance of driver |
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* |
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* @param Decoder $decoder |
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* @param Encoder $encoder |
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*/ |
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public function __construct(Decoder $decoder = null, Encoder $encoder = null) |
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{ |
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if ( ! $this->coreAvailable()) { |
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throw new NotSupportedException( |
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"GD Library extension not available with this PHP installation." |
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); |
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} |
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|
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$this->decoder = $decoder ? $decoder : new Decoder; |
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$this->encoder = $encoder ? $encoder : new Encoder; |
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} |
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|
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/** |
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* Creates new image instance |
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* |
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* @param int $width |
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* @param int $height |
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* @param mixed $background |
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* @return \Intervention\Image\Image |
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*/ |
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public function newImage($width, $height, $background = null) |
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{ |
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// create empty resource |
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$core = imagecreatetruecolor($width, $height); |
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$image = new Image(new static, $core); |
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|
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// set background color |
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$background = new Color($background); |
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imagefill($image->getCore(), 0, 0, $background->getInt()); |
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|
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return $image; |
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} |
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|
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/** |
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* Reads given string into color object |
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* |
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* @param string $value |
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* @return AbstractColor |
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*/ |
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public function parseColor($value) |
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{ |
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return new Color($value); |
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} |
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|
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/** |
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* Checks if core module installation is available |
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* |
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* @return boolean |
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*/ |
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protected function coreAvailable() |
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{ |
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return (extension_loaded('gd') && function_exists('gd_info')); |
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} |
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|
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/** |
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* Returns clone of given core |
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* |
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* @return mixed |
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*/ |
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public function cloneCore($core) |
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{ |
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$width = imagesx($core); |
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$height = imagesy($core); |
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$clone = imagecreatetruecolor($width, $height); |
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imagealphablending($clone, false); |
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imagesavealpha($clone, true); |
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$transparency = imagecolorallocatealpha($clone, 0, 0, 0, 127); |
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imagefill($clone, 0, 0, $transparency); |
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|
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imagecopy($clone, $core, 0, 0, 0, 0, $width, $height); |
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|
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return $clone; |
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} |
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} |
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|
