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<?php |
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namespace BWC\Share\Image; |
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class ImageCropper extends ImageManipulator |
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{ |
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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 resource |
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*/ |
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protected $cropped; |
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/** |
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* Loads image from string |
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* |
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* @param string $imageData |
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*/ |
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public function loadImageFromString($imageData) |
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{ |
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$this->image = imagecreatefromstring($imageData); |
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} |
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/** |
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* Loads image from file |
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* |
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* @param string $filepath |
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*/ |
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public function loadImageFromFile($filepath) |
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{ |
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$this->image = imagecreatefromstring(file_get_contents($filepath)); |
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} |
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/** |
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* Crops image |
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* |
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* @param int $sourceX Source image top left X coordinate |
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* @param int $sourceY Source image top left Y coordinate |
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* @param int $sourceWidth Area width on source image |
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* @param int $sourceHeight Area height on source image |
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* @param int $targetWidth Area width on destination image |
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* @param int $targetHeight Area height on destination image |
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* |
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* @throws \LogicException |
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*/ |
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public function crop($sourceX, $sourceY, $sourceWidth, $sourceHeight, $targetWidth, $targetHeight) |
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{ |
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if (null === $this->image) { |
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throw new \LogicException( |
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'You have to load an image before cropping it. |
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Use loadImageFromString or loadImageFromFile' |
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); |
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} |
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$destination = imagecreatetruecolor($targetWidth, $targetHeight); |
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imagealphablending($destination, false); |
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imagesavealpha($destination, true); |
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$transparent = imagecolorallocatealpha($destination, 255, 255, 255, 127); |
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imagefill($destination, 0, 0, $transparent); |
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imagecopyresampled( |
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$destination, |
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$this->image, |
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0, |
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0, |
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$sourceX, |
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$sourceY, |
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$targetWidth, |
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$targetHeight, |
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$sourceWidth, |
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$sourceHeight |
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); |
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$this->cropped = $destination; |
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} |
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/** |
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* Returns image as string |
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* |
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* @param string $format |
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* |
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* @return string |
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* |
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* @throws \LogicException |
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*/ |
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public function getCroppedImageAsString($format = self::FORMAT_PNG) |
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{ |
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if (null === $this->cropped) { |
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throw new \LogicException('You have to crop image first before getting it'); |
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} |
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return $this->formatImageData($this->cropped, $format); |
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} |
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/** |
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* Saves image to a file |
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* |
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* @param string $filepath |
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* @param string $format |
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*/ |
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public function saveCroppedImageToFile($filepath, $format = self::FORMAT_PNG) |
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{ |
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file_put_contents($filepath, $this->getCroppedImageAsString($format)); |
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} |
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} |
Appsco /
component-share
