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<?php |
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namespace AmaTeam\Image\Projection\Image\Adapter\Gd; |
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use AmaTeam\Image\Projection\API\Image\ImageInterface; |
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use AmaTeam\Image\Projection\Image\EncodingOptions; |
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use AmaTeam\Image\Projection\API\Image\Format; |
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class Image implements ImageInterface |
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{ |
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/** |
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* @var resource |
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*/ |
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private $resource; |
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/** |
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* @var int |
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*/ |
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private $width; |
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/** |
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* @var int |
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*/ |
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private $height; |
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/** |
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* @param resource $resource |
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*/ |
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public function __construct($resource) |
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{ |
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$this->resource = $resource; |
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$this->width = imagesx($resource); |
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$this->height = imagesy($resource); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getWidth() |
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{ |
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return $this->width; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getHeight() |
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{ |
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return $this->height; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getColorAt($x, $y) |
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{ |
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$color = imagecolorat($this->resource, $x, $y); |
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// shifting 23 is like shifting 24 but multiplied by 2, so 127 |
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// converts to 254 |
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return (($color & 0xFFFFFF) << 8) | ((~$color >> 23) & 0xFF); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function setColorAt($x, $y, $color) |
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{ |
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// setting last alpha channel bit to 0, so alpha looks like that: |
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// ?? ?? ?? ?0 |
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// then shifting it 23 bits left, effectively dividing it by 2 |
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$encoded = ($color >> 8) | ((~$color & 0xFE)) << 23; |
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imagesetpixel($this->resource, $x, $y, $encoded); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getBinary($format, EncodingOptions $options = null) |
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{ |
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$options = $options ?: EncodingOptions::defaults(); |
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switch ($format) { |
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case Format::JPEG: |
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$quality = (int) ($options->getQuality() * 100); |
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ob_start(); |
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imagejpeg($this->resource, null, $quality); |
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return ob_get_clean(); |
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case Format::PNG: |
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$compression = (int) ($options->getCompression() * 9); |
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ob_start(); |
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imagepng($this->resource, null, $compression); |
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return ob_get_clean(); |
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default: |
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$message = "Unknown image format $format"; |
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throw new \BadMethodCallException($message); |
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} |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getResource() |
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{ |
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return $this->resource; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function __destruct() |
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{ |
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imagedestroy($this->resource); |
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} |
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} |
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ama-team /
php-projection-framework
