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<?php |
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namespace BWC\Share\Image; |
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class ImageResizer extends ImageManipulator |
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{ |
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/** |
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* @var resource |
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*/ |
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private $_image; |
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public function fromString($image) |
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{ |
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$this->_image = imagecreatefromstring($image); |
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imagealphablending($this->_image, false); |
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imagesavealpha($this->_image, true); |
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} |
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public function toString($format = self::FORMAT_PNG, $quality = null) |
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{ |
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return $this->formatImageData($this->_image, $format, $quality); |
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} |
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public function scaleToFit($width, $height, $force = false) |
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{ |
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$this->scale($width, $height, true, $force); |
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} |
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public function scaleToCover($width, $height, $force = false) |
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{ |
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$this->scale($width, $height, false, $force); |
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} |
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/** |
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* @param int $width Target width |
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* @param int $height Target height |
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* @param bool $toFit If true, image fill fit to given dimensions, if false, it will cover them |
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* @param bool $force If true, image will be resized even if target dimensions are larger than original |
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*/ |
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protected function scale($width, $height, $toFit, $force) |
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{ |
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if (null === $this->_image) return; |
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$rawWidth = $this->_getWidth(); |
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$rawHeight = $this->_getHeight(); |
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$widthOver = $rawWidth / $width; |
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$heightOver = $rawHeight / $height; |
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if ($toFit) { |
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$scalingFactor = max($widthOver, $heightOver); |
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} else { |
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$scalingFactor = min($widthOver, $heightOver); |
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} |
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if ($scalingFactor > 1 || $force) { |
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$destWidth = $rawWidth / $scalingFactor; |
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$destHeight = $rawHeight / $scalingFactor; |
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$destImage = imagecreatetruecolor($destWidth, $destHeight); |
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imagealphablending($destImage, false); |
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imagesavealpha($destImage, true); |
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$transparent = imagecolorallocatealpha($destImage, 255, 255, 255, 127); |
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imagefill($destImage, 0, 0, $transparent); |
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imagecopyresampled($destImage, $this->_image, 0, 0, 0, 0, $destWidth, $destHeight, $rawWidth, $rawHeight); |
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$this->_image = $destImage; |
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} |
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} |
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protected function _getWidth() |
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{ |
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return $this->_image ? imagesx($this->_image) : null; |
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} |
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protected function _getHeight() |
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{ |
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return $this->_image ? imagesy($this->_image) : null; |
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} |
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} |
Appsco /
component-share
