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<?php |
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namespace kalanis\kw_images\Content; |
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use kalanis\kw_files\FilesException; |
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use kalanis\kw_images\Graphics; |
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use kalanis\kw_images\ImagesException; |
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use kalanis\kw_images\Interfaces\IExifConstants; |
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use kalanis\kw_images\Interfaces\IIMTranslations; |
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use kalanis\kw_images\Interfaces\ISizes; |
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use kalanis\kw_images\Sources; |
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use kalanis\kw_images\Traits\TLang; |
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use kalanis\kw_mime\MimeException; |
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use kalanis\kw_paths\PathsException; |
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/** |
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* Class ImageOrientate |
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* Orientate image against the data in its exif |
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* @package kalanis\kw_images\Content |
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* @link https://stackoverflow.com/questions/7489742/php-read-exif-data-and-adjust-orientation |
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* @link https://jdhao.github.io/2019/07/31/image_rotation_exif_info/#exif-orientation-flag |
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* The main difference between rotation and orientation classes is from where came the data which will define what kind |
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* of operation will be processed. Orientation has them in image EXIF, rotation got them from external input. |
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*/ |
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class ImageOrientate |
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{ |
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use TLang; |
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protected Sources\Image $libImage; |
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protected Graphics $libGraphics; |
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protected ISizes $config; |
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public function __construct(Graphics $graphics, ISizes $config, Sources\Image $image, ?IIMTranslations $lang = null) |
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{ |
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$this->setImLang($lang); |
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$this->libImage = $image; |
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$this->libGraphics = $graphics; |
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$this->config = $config; |
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} |
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/** |
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* @param string[] $sourcePath |
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* @param string[]|null $targetPath |
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* @throws FilesException |
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* @throws ImagesException |
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* @throws MimeException |
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* @throws PathsException |
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* @return bool |
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*/ |
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public function process(array $sourcePath, ?array $targetPath = null): bool |
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{ |
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$sourceFull = array_values($sourcePath); |
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$targetFull = $targetPath ? array_values($targetPath) : $sourceFull; |
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$tempPath = strval(tempnam(sys_get_temp_dir(), $this->config->getTempPrefix())); |
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// get from the storage |
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$resource = $this->libImage->get($sourceFull); |
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if (empty($resource)) { |
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@unlink($tempPath); |
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throw new FilesException($this->getImLang()->imThumbCannotGetBaseImage()); |
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} |
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if (false === @file_put_contents($tempPath, $resource)) { |
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// @codeCoverageIgnoreStart |
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@unlink($tempPath); |
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throw new FilesException($this->getImLang()->imThumbCannotStoreTemporaryImage()); |
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} |
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// @codeCoverageIgnoreEnd |
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try { |
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$exif = @exif_read_data($tempPath); |
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if (false === $exif) { |
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throw new ImagesException($this->getImLang()->imImageCannotOrientate()); |
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} |
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// now process image locally |
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if (!empty($exif['Orientation'])) { |
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$orientate = intval($exif['Orientation']); |
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$this->libGraphics->rotate( |
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$this->getAngle($orientate), |
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$this->getMirror($orientate), |
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$tempPath, |
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$sourceFull, |
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$targetFull |
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); |
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} |
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} catch (ImagesException $ex) { |
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// clear when fails |
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@unlink($tempPath); |
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throw $ex; |
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} |
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// return result to the storage as new file |
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$result = @file_get_contents($tempPath); |
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if (false === $result) { |
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// @codeCoverageIgnoreStart |
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@unlink($tempPath); |
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throw new FilesException($this->getImLang()->imThumbCannotLoadTemporaryImage()); |
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} |
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// @codeCoverageIgnoreEnd |
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$set = $this->libImage->set($targetFull, $result); |
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@unlink($tempPath); |
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return $set; |
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} |
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/** |
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* @param int $orientation |
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* @throws ImagesException |
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* @return float |
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*/ |
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protected function getAngle(int $orientation): float |
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{ |
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switch ($orientation) { |
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case IExifConstants::EXIF_ORIENTATION_ON_LEFT: |
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case IExifConstants::EXIF_ORIENTATION_MIRROR_ON_LEFT: |
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return 90; |
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case IExifConstants::EXIF_ORIENTATION_UPSIDE_DOWN: |
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case IExifConstants::EXIF_ORIENTATION_MIRROR_UPSIDE_DOWN: |
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return 180; |
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case IExifConstants::EXIF_ORIENTATION_ON_RIGHT: |
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case IExifConstants::EXIF_ORIENTATION_MIRROR_ON_RIGHT: |
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return 270; |
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case IExifConstants::EXIF_ORIENTATION_NORMAL: |
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case IExifConstants::EXIF_ORIENTATION_MIRROR_SIMPLE: |
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return 0; |
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// @codeCoverageIgnoreStart |
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default: |
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throw new ImagesException($this->getImLang()->imImageCannotOrientate()); |
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// @codeCoverageIgnoreEnd |
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} |
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} |
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/** |
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* @param int $orientation |
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* @return int|null |
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*/ |
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protected function getMirror(int $orientation): ?int |
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{ |
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switch ($orientation) { |
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case IExifConstants::EXIF_ORIENTATION_MIRROR_UPSIDE_DOWN: |
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case IExifConstants::EXIF_ORIENTATION_MIRROR_ON_RIGHT: |
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case IExifConstants::EXIF_ORIENTATION_MIRROR_ON_LEFT: |
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case IExifConstants::EXIF_ORIENTATION_MIRROR_SIMPLE: |
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return IMG_FLIP_HORIZONTAL; |
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default: |
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return null; |
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} |
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} |
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public function getImage(): Sources\Image |
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{ |
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return $this->libImage; |
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} |
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} |
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alex-kalanis /
kw_images
If you suppress an error, we recommend checking for the error condition explicitly: