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<?php |
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namespace kalanis\kw_images\Graphics; |
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use kalanis\kw_images\ImagesException; |
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use kalanis\kw_images\Interfaces\IIMTranslations; |
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use kalanis\kw_images\Interfaces\IExifConstants; |
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use kalanis\kw_images\Traits\TLang; |
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/** |
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* Class Processor |
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* @package kalanis\kw_images |
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* Pass images in temporary local storage - cannot work with images directly in main storage |
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*/ |
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class Processor |
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{ |
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use TLang; |
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protected Format\Factory $factory; |
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/** @var resource|\GdImage|null */ |
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protected $resource = null; |
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/** |
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* @param Format\Factory $factory |
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* @param IIMTranslations|null $lang |
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* @throws ImagesException |
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*/ |
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public function __construct(Format\Factory $factory, ?IIMTranslations $lang = null) |
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{ |
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$this->setImLang($lang); |
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if (!(function_exists('imagecreatetruecolor') |
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&& function_exists('imagecolorallocate') |
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&& function_exists('imagesetpixel') |
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&& function_exists('imagecopyresized') |
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&& function_exists('imagecopyresampled') |
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&& function_exists('imagesx') |
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&& function_exists('imagesy') |
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&& function_exists('imagerotate') |
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&& function_exists('imageflip') |
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)) { |
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// @codeCoverageIgnoreStart |
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throw new ImagesException($this->getImLang()->imGdLibNotPresent()); |
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} |
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// @codeCoverageIgnoreEnd |
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$this->factory = $factory; |
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} |
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/** |
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* @param string $type |
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* @param string $tempPath |
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* @throws ImagesException |
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* @return $this |
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*/ |
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public function load(string $type, string $tempPath): self |
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{ |
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$processor = $this->factory->getByType($type, $this->getImLang()); |
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$this->resource = $processor->load($tempPath); |
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return $this; |
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} |
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/** |
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* @param string $type |
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* @param string $tempPath |
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* @throws ImagesException |
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* @return $this |
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*/ |
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public function save(string $type, string $tempPath): self |
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{ |
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$processor = $this->factory->getByType($type, $this->getImLang()); |
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$processor->save($tempPath, $this->getResource()); |
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return $this; |
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} |
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/** |
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* Change image size - cut it to desired size |
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* @param int|null $width |
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* @param int|null $height |
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* @throws ImagesException |
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* @return $this |
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*/ |
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public function resize(?int $width = null, ?int $height = null): self |
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{ |
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$fromWidth = $this->width(); |
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$fromHeight = $this->height(); |
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$width = (!is_null($width) && (0 < $width)) ? intval($width) : $fromWidth; |
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$height = (!is_null($height) && (0 < $height)) ? intval($height) : $fromHeight; |
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$resource = $this->create($width, $height); |
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if (false === imagecopyresized($resource, $this->getResource(), 0, 0, 0, 0, $width, $height, $fromWidth, $fromHeight)) { |
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// @codeCoverageIgnoreStart |
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imagedestroy($resource); |
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throw new ImagesException($this->getImLang()->imImageCannotResize()); |
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} |
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// @codeCoverageIgnoreEnd |
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imagedestroy($this->getResource()); |
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$this->resource = $resource; |
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return $this; |
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} |
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/** |
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* Change image size - content will change its proportions according the passed sizes |
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* @param int|null $width |
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* @param int|null $height |
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* @throws ImagesException |
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* @return $this |
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*/ |
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public function resample(?int $width = null, ?int $height = null): self |
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{ |
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$fromWidth = $this->width(); |
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$fromHeight = $this->height(); |
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$width = (!is_null($width) && (0 < $width)) ? intval($width) : $fromWidth; |
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$height = (!is_null($height) && (0 < $height)) ? intval($height) : $fromHeight; |
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$resource = $this->create($width, $height); |
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if (false === imagecopyresampled($resource, $this->getResource(), 0, 0, 0, 0, $width, $height, $fromWidth, $fromHeight)) { |
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// @codeCoverageIgnoreStart |
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imagedestroy($resource); |
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throw new ImagesException($this->getImLang()->imImageCannotResample()); |
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} |
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// @codeCoverageIgnoreEnd |
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imagedestroy($this->getResource()); |
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$this->resource = $resource; |
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return $this; |
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} |
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/** |
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* Orientate image by passed info |
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* @param int $currentOrientation |
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* @throws ImagesException |
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* @return $this |
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* @link https://jdhao.github.io/2019/07/31/image_rotation_exif_info/#exif-orientation-flag |
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* @link https://stackoverflow.com/questions/7489742/php-read-exif-data-and-adjust-orientation |
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*/ |
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public function orientate(int $currentOrientation): self |
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{ |
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$image = $this->resource; // normal |
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if (in_array($currentOrientation, [ |
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IExifConstants::EXIF_ORIENTATION_UPSIDE_DOWN, |
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IExifConstants::EXIF_ORIENTATION_MIRROR_UPSIDE_DOWN, |
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])) { |
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$image = imagerotate($this->resource, 180, 0); |
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} |
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if (in_array($currentOrientation, [ |
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IExifConstants::EXIF_ORIENTATION_ON_LEFT, |
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IExifConstants::EXIF_ORIENTATION_MIRROR_ON_LEFT, |
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])) { |
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$image = imagerotate($this->resource, 270, 0); |
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} |
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if (in_array($currentOrientation, [ |
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IExifConstants::EXIF_ORIENTATION_ON_RIGHT, |
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IExifConstants::EXIF_ORIENTATION_MIRROR_ON_RIGHT, |
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])) { |
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$image = imagerotate($this->resource, 90, 0); |
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} |
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if (in_array($currentOrientation, [ |
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IExifConstants::EXIF_ORIENTATION_MIRROR_SIMPLE, |
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IExifConstants::EXIF_ORIENTATION_MIRROR_ON_LEFT, |
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IExifConstants::EXIF_ORIENTATION_MIRROR_ON_RIGHT, |
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IExifConstants::EXIF_ORIENTATION_MIRROR_UPSIDE_DOWN, |
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])) { |
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imageflip($image, IMG_FLIP_HORIZONTAL); |
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} |
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if (empty($image)) { |
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// @codeCoverageIgnoreStart |
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throw new ImagesException($this->getImLang()->imImageCannotOrientate()); |
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} |
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// @codeCoverageIgnoreEnd |
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$this->resource = $image; |
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return $this; |
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} |
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/** |
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* Create empty image resource |
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* @param int $width |
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* @param int $height |
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* @throws ImagesException |
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* @return \GdImage|resource |
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*/ |
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protected function create(int $width, int $height) |
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{ |
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$resource = imagecreatetruecolor($width, $height); |
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if (false === $resource) { |
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// @codeCoverageIgnoreStart |
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throw new ImagesException($this->getImLang()->imImageCannotCreateEmpty()); |
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} |
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// @codeCoverageIgnoreEnd |
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return $resource; |
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} |
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/** |
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* @throws ImagesException |
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* @return int |
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*/ |
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public function width(): int |
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{ |
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$size = imagesx($this->getResource()); |
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if (false === $size) { |
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// @codeCoverageIgnoreStart |
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throw new ImagesException($this->getImLang()->imImageCannotGetSize()); |
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} |
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// @codeCoverageIgnoreEnd |
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return intval($size); |
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} |
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/** |
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* @throws ImagesException |
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* @return int |
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*/ |
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public function height(): int |
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{ |
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$size = imagesy($this->getResource()); |
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if (false === $size) { |
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// @codeCoverageIgnoreStart |
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throw new ImagesException($this->getImLang()->imImageCannotGetSize()); |
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} |
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// @codeCoverageIgnoreEnd |
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return intval($size); |
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} |
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/** |
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* @throws ImagesException |
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* @return \GdImage|resource |
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*/ |
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public function getResource() |
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{ |
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if (empty($this->resource)) { |
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throw new ImagesException($this->getImLang()->imImageLoadFirst()); |
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} |
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return $this->resource; |
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} |
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} |
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alex-kalanis /
kw_images
