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<?php |
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namespace TraderInteractive\Util; |
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use Imagick; |
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use InvalidArgumentException; |
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use TraderInteractive\Util; |
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final class Image |
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{ |
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/** |
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* @var string |
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*/ |
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const DEFAULT_COLOR = 'white'; |
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/** |
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* @var bool |
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*/ |
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const DEFAULT_UPSIZE = false; |
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/** |
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* @var bool |
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*/ |
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const DEFAULT_BESTFIT = false; |
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/** |
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* @var int |
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*/ |
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const DEFAULT_MAX_WIDTH = 10000; |
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/** |
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* @var int |
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*/ |
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const DEFAULT_MAX_HEIGHT = 10000; |
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/** |
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* @var bool |
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*/ |
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const DEFAULT_BLUR_BACKGROUND = false; |
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/** |
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* @var float |
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*/ |
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const DEFAULT_BLUR_VALUE = 15.0; |
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/** |
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* @var array |
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*/ |
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const DEFAULT_OPTIONS = [ |
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'color' => self::DEFAULT_COLOR, |
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'upsize' => self::DEFAULT_UPSIZE, |
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'bestfit' => self::DEFAULT_BESTFIT, |
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'maxWidth' => self::DEFAULT_MAX_WIDTH, |
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'maxHeight' => self::DEFAULT_MAX_HEIGHT, |
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'blurBackground' => self::DEFAULT_BLUR_BACKGROUND, |
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'blurValue' => self::DEFAULT_BLUR_VALUE, |
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]; |
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/** |
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* @param Imagick $source The image magick object to resize |
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* @param int $boxWidth The final width of the image. |
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* @param int $boxHeight The final height of the image. |
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* @param array $options Options for the resize operation. |
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* |
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* @return Imagick |
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* |
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* @throws \Exception Thrown if options are invalid. |
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*/ |
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public static function resize(Imagick $source, int $boxWidth, int $boxHeight, array $options = []) : Imagick |
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{ |
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$options += self::DEFAULT_OPTIONS; |
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$color = $options['color']; |
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Util::ensure(true, is_string($color), InvalidArgumentException::class, ['$options["color"] was not a string']); |
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$upsize = $options['upsize']; |
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Util::ensure(true, is_bool($upsize), InvalidArgumentException::class, ['$options["upsize"] was not a bool']); |
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$bestfit = $options['bestfit']; |
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Util::ensure(true, is_bool($bestfit), InvalidArgumentException::class, ['$options["bestfit"] was not a bool']); |
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$blurBackground = $options['blurBackground']; |
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Util::ensure( |
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true, |
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is_bool($blurBackground), |
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InvalidArgumentException::class, |
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['$options["blurBackground"] was not a bool'] |
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); |
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$blurValue = $options['blurValue']; |
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Util::ensure( |
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true, |
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is_float($blurValue), |
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InvalidArgumentException::class, |
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['$options["blurValue"] was not a float'] |
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); |
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$maxWidth = $options['maxWidth']; |
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Util::ensure(true, is_int($maxWidth), InvalidArgumentException::class, ['$options["maxWidth"] was not an int']); |
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$maxHeight = $options['maxHeight']; |
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Util::ensure( |
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true, |
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is_int($maxHeight), |
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InvalidArgumentException::class, |
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['$options["maxHeight"] was not an int'] |
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); |
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if ($boxWidth > $maxWidth || $boxWidth <= 0) { |
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throw new InvalidArgumentException('a $boxSizes width was not between 0 and $options["maxWidth"]'); |
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} |
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if ($boxHeight > $maxHeight || $boxHeight <= 0) { |
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throw new InvalidArgumentException('a $boxSizes height was not between 0 and $options["maxHeight"]'); |
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} |
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$clone = clone $source; |
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self::rotateImage($clone); |
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$width = $clone->getImageWidth(); |
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$height = $clone->getImageHeight(); |
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//ratio over 1 is horizontal, under 1 is vertical |
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$boxRatio = $boxWidth / $boxHeight; |
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//height should be positive since I didnt find a way you could get zero into imagick |
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$originalRatio = $width / $height; |
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$targetWidth = null; |
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$targetHeight = null; |
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$targetX = null; |
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$targetY = null; |
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View Code Duplication |
if ($width < $boxWidth && $height < $boxHeight && !$upsize) { |
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$targetWidth = $width; |
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$targetHeight = $height; |
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$targetX = ($boxWidth - $width) / 2; |
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$targetY = ($boxHeight - $height) / 2; |
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} else { |
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//if box is more vertical than original |
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if ($boxRatio < $originalRatio) { |
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$targetWidth = $boxWidth; |
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$targetHeight = (int)((double)$boxWidth / $originalRatio); |
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$targetX = 0; |
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$targetY = ($boxHeight - $targetHeight) / 2; |
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} else { |
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$targetWidth = (int)((double)$boxHeight * $originalRatio); |
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$targetHeight = $boxHeight; |
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$targetX = ($boxWidth - $targetWidth) / 2; |
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$targetY = 0; |
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} |
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} |
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$widthReduced = false; |
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if ($width > $targetWidth) { |
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$width = $targetWidth; |
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$widthReduced = true; |
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} |
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$heightReduced = false; |
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if ($height > $targetHeight) { |
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$height = $targetHeight; |
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$heightReduced = true; |
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} |
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if ($widthReduced || $heightReduced) { |
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if ($clone->resizeImage($width, $height, \Imagick::FILTER_BOX, 1.0) !== true) { |
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//cumbersome to test |
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throw new \Exception('Imagick::resizeImage() did not return true');//@codeCoverageIgnore |
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} |
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} |
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View Code Duplication |
if ($upsize && ($width < $targetWidth || $height < $targetHeight)) { |
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if ($clone->resizeImage($targetWidth, $targetHeight, \Imagick::FILTER_CUBIC, 1.0, $bestfit) !== true) { |
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//cumbersome to test |
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throw new \Exception('Imagick::resizeImage() did not return true');//@codeCoverageIgnore |
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} |
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} |
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if ($clone->getImageHeight() === $boxHeight && $clone->getImageWidth() === $boxWidth) { |
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return $clone; |
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} |
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//put image in box |
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$canvas = self::getBackgroundCanvas($clone, $color, $blurBackground, $blurValue, $boxWidth, $boxHeight); |
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if ($canvas->compositeImage($clone, Imagick::COMPOSITE_DEFAULT, $targetX, $targetY) !== true) { |
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//cumbersome to test |
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throw new \Exception('Imagick::compositeImage() did not return true');//@codeCoverageIgnore |
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} |
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//reason we are not supporting the options in self::write() here is because format, and strip headers are |
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//only relevant once written Imagick::stripImage() doesnt even have an effect until written |
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//also the user can just call that function with the resultant $canvas |
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return $canvas; |
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} |
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/** |
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* resizes images into a bounding box. Maintains aspect ratio, extra space filled with given color. |
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* |
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* @param \Imagick $source source image to resize. Will not modify |
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* @param array $boxSizes resulting bounding boxes. Each value should be an array with width and height, both |
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* integers |
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* @param array $options options |
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* string color (default white) background color. Any supported from |
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* http://www.imagemagick.org/script/color.php#color_names |
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* bool upsize (default false) true to upsize the original image or false to upsize just the bounding box |
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* bool bestfit (default false) true to resize with the best fit option. |
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* int maxWidth (default 10000) max width allowed for $boxWidth |
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* int maxHeight (default 10000) max height allowed for $boxHeight |
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* bool blurBackground (default false) true to create a composite resized image placed over an enlarged blurred |
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* image of the original. |
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* |
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* @return array array of \Imagick objects resized. Keys maintained from $boxSizes |
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* |
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* @throws InvalidArgumentException if $options["color"] was not a string |
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* @throws InvalidArgumentException if $options["upsize"] was not a bool |
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* @throws InvalidArgumentException if $options["bestfit"] was not a bool |
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* @throws InvalidArgumentException if $options["maxWidth"] was not an int |
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* @throws InvalidArgumentException if $options["maxHeight"] was not an int |
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* @throws InvalidArgumentException if a width in a $boxSizes value was not an int |
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* @throws InvalidArgumentException if a height in a $boxSizes value was not an int |
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* @throws InvalidArgumentException if a $boxSizes width was not between 0 and $options["maxWidth"] |
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* @throws InvalidArgumentException if a $boxSizes height was not between 0 and $options["maxHeight"] |
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* @throws \Exception |
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*/ |
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public static function resizeMulti(\Imagick $source, array $boxSizes, array $options = []) : array |
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{ |
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//algorithm inspired from http://today.java.net/pub/a/today/2007/04/03/perils-of-image-getscaledinstance.html |
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//use of 2x2 binning is arguably the best quality one will get downsizing and is what lots of hardware does in |
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//the photography field, while being reasonably fast. Upsizing is more subjective but you can't get much |
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//better than bicubic which is what is used here. |
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$options = $options + self::DEFAULT_OPTIONS; |
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$color = $options['color']; |
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Util::ensure(true, is_string($color), InvalidArgumentException::class, ['$options["color"] was not a string']); |
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$upsize = $options['upsize']; |
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Util::ensure(true, is_bool($upsize), InvalidArgumentException::class, ['$options["upsize"] was not a bool']); |
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$bestfit = $options['bestfit']; |
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Util::ensure(true, is_bool($bestfit), InvalidArgumentException::class, ['$options["bestfit"] was not a bool']); |
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$blurBackground = $options['blurBackground']; |
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Util::ensure( |
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true, |
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is_bool($blurBackground), |
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InvalidArgumentException::class, |
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['$options["blurBackground"] was not a bool'] |
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); |
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$blurValue = $options['blurValue']; |
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Util::ensure( |
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true, |
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is_float($blurValue), |
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InvalidArgumentException::class, |
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['$options["blurValue"] was not a float'] |
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); |
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$maxWidth = $options['maxWidth']; |
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Util::ensure(true, is_int($maxWidth), InvalidArgumentException::class, ['$options["maxWidth"] was not an int']); |
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$maxHeight = $options['maxHeight']; |
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Util::ensure( |
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true, |
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is_int($maxHeight), |
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InvalidArgumentException::class, |
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['$options["maxHeight"] was not an int'] |
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); |
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foreach ($boxSizes as $boxSizeKey => $boxSize) { |
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View Code Duplication |
if (!isset($boxSize['width']) || !is_int($boxSize['width'])) { |
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throw new InvalidArgumentException('a width in a $boxSizes value was not an int'); |
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} |
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View Code Duplication |
if (!isset($boxSize['height']) || !is_int($boxSize['height'])) { |
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throw new InvalidArgumentException('a height in a $boxSizes value was not an int'); |
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} |
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if ($boxSize['width'] > $maxWidth || $boxSize['width'] <= 0) { |
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throw new InvalidArgumentException('a $boxSizes width was not between 0 and $options["maxWidth"]'); |
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} |
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if ($boxSize['height'] > $maxHeight || $boxSize['height'] <= 0) { |
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throw new InvalidArgumentException('a $boxSizes height was not between 0 and $options["maxHeight"]'); |
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} |
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} |
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$results = []; |
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$cloneCache = []; |
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foreach ($boxSizes as $boxSizeKey => $boxSize) { |
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$boxWidth = $boxSize['width']; |
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$boxHeight = $boxSize['height']; |
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$clone = clone $source; |
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self::rotateImage($clone); |
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$width = $clone->getImageWidth(); |
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$height = $clone->getImageHeight(); |
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//ratio over 1 is horizontal, under 1 is vertical |
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$boxRatio = $boxWidth / $boxHeight; |
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//height should be positive since I didnt find a way you could get zero into imagick |
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$originalRatio = $width / $height; |
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$targetWidth = null; |
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$targetHeight = null; |
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$targetX = null; |
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$targetY = null; |
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View Code Duplication |
if ($width < $boxWidth && $height < $boxHeight && !$upsize) { |
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$targetWidth = $width; |
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$targetHeight = $height; |
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$targetX = ($boxWidth - $width) / 2; |
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$targetY = ($boxHeight - $height) / 2; |
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} else { |
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//if box is more vertical than original |
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if ($boxRatio < $originalRatio) { |
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$targetWidth = $boxWidth; |
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$targetHeight = (int)((double)$boxWidth / $originalRatio); |
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$targetX = 0; |
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$targetY = ($boxHeight - $targetHeight) / 2; |
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} else { |
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$targetWidth = (int)((double)$boxHeight * $originalRatio); |
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$targetHeight = $boxHeight; |
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$targetX = ($boxWidth - $targetWidth) / 2; |
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$targetY = 0; |
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} |
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} |
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//do iterative downsize by halfs (2x2 binning is a common name) on dimensions that are bigger than target |
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//width and height |
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while (true) { |
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$widthReduced = false; |
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$widthIsHalf = false; |
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if ($width > $targetWidth) { |
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$width = (int)($width / 2); |
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$widthReduced = true; |
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$widthIsHalf = true; |
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if ($width < $targetWidth) { |
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$width = $targetWidth; |
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$widthIsHalf = false; |
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} |
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} |
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|
$heightReduced = false; |
344
|
|
|
$heightIsHalf = false; |
345
|
|
|
if ($height > $targetHeight) { |
346
|
|
|
$height = (int)($height / 2); |
347
|
|
|
$heightReduced = true; |
348
|
|
|
$heightIsHalf = true; |
349
|
|
|
if ($height < $targetHeight) { |
350
|
|
|
$height = $targetHeight; |
351
|
|
|
$heightIsHalf = false; |
352
|
|
|
} |
353
|
|
|
} |
354
|
|
|
|
355
|
|
|
if (!$widthReduced && !$heightReduced) { |
356
|
|
|
break; |
357
|
|
|
} |
358
|
|
|
|
359
|
|
|
$cacheKey = "{$width}x{$height}"; |
360
|
|
|
if (isset($cloneCache[$cacheKey])) { |
361
|
|
|
$clone = clone $cloneCache[$cacheKey]; |
362
|
|
|
continue; |
363
|
|
|
} |
364
|
|
|
|
365
|
|
|
if ($clone->resizeImage($width, $height, \Imagick::FILTER_BOX, 1.0) !== true) { |
366
|
|
|
//cumbersome to test |
367
|
|
|
throw new \Exception('Imagick::resizeImage() did not return true');//@codeCoverageIgnore |
368
|
|
|
} |
369
|
|
|
|
370
|
|
|
if ($widthIsHalf && $heightIsHalf) { |
371
|
|
|
$cloneCache[$cacheKey] = clone $clone; |
372
|
|
|
} |
373
|
|
|
} |
374
|
|
|
|
375
|
|
View Code Duplication |
if ($upsize && ($width < $targetWidth || $height < $targetHeight)) { |
|
|
|
|
376
|
|
|
if ($clone->resizeImage($targetWidth, $targetHeight, \Imagick::FILTER_CUBIC, 1.0, $bestfit) !== true) { |
377
|
|
|
//cumbersome to test |
378
|
|
|
throw new \Exception('Imagick::resizeImage() did not return true');//@codeCoverageIgnore |
379
|
|
|
} |
380
|
|
|
} |
381
|
|
|
|
382
|
|
|
if ($clone->getImageHeight() === $boxHeight && $clone->getImageWidth() === $boxWidth) { |
383
|
|
|
$results[$boxSizeKey] = $clone; |
384
|
|
|
continue; |
385
|
|
|
} |
386
|
|
|
|
387
|
|
|
//put image in box |
388
|
|
|
$canvas = self::getBackgroundCanvas($source, $color, $blurBackground, $blurValue, $boxWidth, $boxHeight); |
389
|
|
|
if ($canvas->compositeImage($clone, \Imagick::COMPOSITE_ATOP, $targetX, $targetY) !== true) { |
390
|
|
|
//cumbersome to test |
391
|
|
|
throw new \Exception('Imagick::compositeImage() did not return true');//@codeCoverageIgnore |
392
|
|
|
} |
393
|
|
|
|
394
|
|
|
//reason we are not supporting the options in self::write() here is because format, and strip headers are |
395
|
|
|
//only relevant once written Imagick::stripImage() doesnt even have an effect until written |
396
|
|
|
//also the user can just call that function with the resultant $canvas |
397
|
|
|
$results[$boxSizeKey] = $canvas; |
398
|
|
|
} |
399
|
|
|
|
400
|
|
|
foreach ($cloneCache as $clone) { |
401
|
|
|
$clone->destroy(); |
402
|
|
|
} |
403
|
|
|
|
404
|
|
|
return $results; |
405
|
|
|
} |
406
|
|
|
|
407
|
|
|
private static function getBackgroundCanvas( |
408
|
|
|
\Imagick $source, |
409
|
|
|
string $color, |
410
|
|
|
bool $blurBackground, |
411
|
|
|
float $blurValue, |
412
|
|
|
int $boxWidth, |
413
|
|
|
int $boxHeight |
414
|
|
|
) : \Imagick { |
415
|
|
|
if ($blurBackground || $color === 'blur') { |
416
|
|
|
return self::getBlurredBackgroundCanvas($source, $blurValue, $boxWidth, $boxHeight); |
417
|
|
|
} |
418
|
|
|
|
419
|
|
|
return self::getColoredBackgroundCanvas($color, $boxWidth, $boxHeight); |
420
|
|
|
} |
421
|
|
|
|
422
|
|
|
private static function getColoredBackgroundCanvas(string $color, int $boxWidth, int $boxHeight) |
423
|
|
|
{ |
424
|
|
|
$canvas = new \Imagick(); |
425
|
|
|
$imageCreated = $canvas->newImage($boxWidth, $boxHeight, $color); |
426
|
|
|
Util::ensure(true, $imageCreated, 'Imagick::newImage() did not return true'); |
427
|
|
|
return $canvas; |
428
|
|
|
} |
429
|
|
|
|
430
|
|
|
private static function getBlurredBackgroundCanvas( |
431
|
|
|
\Imagick $source, |
432
|
|
|
float $blurValue, |
433
|
|
|
int $boxWidth, |
434
|
|
|
int $boxHeight |
435
|
|
|
) : \Imagick { |
436
|
|
|
$canvas = clone $source; |
437
|
|
|
self::rotateImage($canvas); |
438
|
|
|
$canvas->resizeImage($boxWidth, $boxHeight, \Imagick::FILTER_BOX, $blurValue, false); |
439
|
|
|
return $canvas; |
440
|
|
|
} |
441
|
|
|
|
442
|
|
|
/** |
443
|
|
|
* write $source to $destPath with $options applied |
444
|
|
|
* |
445
|
|
|
* @param \Imagick $source source image. Will not modify |
446
|
|
|
* @param string $destPath destination image path |
447
|
|
|
* @param array $options options |
448
|
|
|
* string format (default jpeg) Any from http://www.imagemagick.org/script/formats.php#supported |
449
|
|
|
* int directoryMode (default 0777) chmod mode for any parent directories created |
450
|
|
|
* int fileMode (default 0777) chmod mode for the resized image file |
451
|
|
|
* bool stripHeaders (default true) whether to strip headers (exif, etc). Is only reflected in $destPath, |
452
|
|
|
* not returned clone |
453
|
|
|
* |
454
|
|
|
* @return void |
455
|
|
|
* |
456
|
|
|
* @throws InvalidArgumentException if $destPath was not a string |
457
|
|
|
* @throws InvalidArgumentException if $options["format"] was not a string |
458
|
|
|
* @throws InvalidArgumentException if $options["directoryMode"] was not an int |
459
|
|
|
* @throws InvalidArgumentException if $options["fileMode"] was not an int |
460
|
|
|
* @throws InvalidArgumentException if $options["stripHeaders"] was not a bool |
461
|
|
|
* @throws \Exception |
462
|
|
|
*/ |
463
|
|
|
public static function write(\Imagick $source, string $destPath, array $options = []) |
464
|
|
|
{ |
465
|
|
|
$format = 'jpeg'; |
466
|
|
|
if (array_key_exists('format', $options)) { |
467
|
|
|
$format = $options['format']; |
468
|
|
|
if (!is_string($format)) { |
469
|
|
|
throw new InvalidArgumentException('$options["format"] was not a string'); |
470
|
|
|
} |
471
|
|
|
} |
472
|
|
|
|
473
|
|
|
$directoryMode = 0777; |
474
|
|
|
if (array_key_exists('directoryMode', $options)) { |
475
|
|
|
$directoryMode = $options['directoryMode']; |
476
|
|
|
if (!is_int($directoryMode)) { |
477
|
|
|
throw new InvalidArgumentException('$options["directoryMode"] was not an int'); |
478
|
|
|
} |
479
|
|
|
} |
480
|
|
|
|
481
|
|
|
$fileMode = 0777; |
482
|
|
|
if (array_key_exists('fileMode', $options)) { |
483
|
|
|
$fileMode = $options['fileMode']; |
484
|
|
|
if (!is_int($fileMode)) { |
485
|
|
|
throw new InvalidArgumentException('$options["fileMode"] was not an int'); |
486
|
|
|
} |
487
|
|
|
} |
488
|
|
|
|
489
|
|
|
$stripHeaders = true; |
490
|
|
|
if (array_key_exists('stripHeaders', $options)) { |
491
|
|
|
$stripHeaders = $options['stripHeaders']; |
492
|
|
|
if ($stripHeaders !== false && $stripHeaders !== true) { |
493
|
|
|
throw new InvalidArgumentException('$options["stripHeaders"] was not a bool'); |
494
|
|
|
} |
495
|
|
|
} |
496
|
|
|
|
497
|
|
|
$destDir = dirname($destPath); |
498
|
|
|
if (!is_dir($destDir)) { |
499
|
|
|
$oldUmask = umask(0); |
500
|
|
|
if (!mkdir($destDir, $directoryMode, true)) { |
501
|
|
|
//cumbersome to test |
502
|
|
|
throw new \Exception('mkdir() returned false');//@codeCoverageIgnore |
503
|
|
|
} |
504
|
|
|
|
505
|
|
|
umask($oldUmask); |
506
|
|
|
} |
507
|
|
|
|
508
|
|
|
$clone = clone $source; |
509
|
|
|
|
510
|
|
|
if ($clone->setImageFormat($format) !== true) { |
511
|
|
|
//cumbersome to test |
512
|
|
|
throw new \Exception('Imagick::setImageFormat() did not return true');//@codeCoverageIgnore |
513
|
|
|
} |
514
|
|
|
|
515
|
|
|
if ($stripHeaders && $clone->stripImage() !== true) { |
516
|
|
|
//cumbersome to test |
517
|
|
|
throw new \Exception('Imagick::stripImage() did not return true');//@codeCoverageIgnore |
518
|
|
|
} |
519
|
|
|
|
520
|
|
|
if ($clone->writeImage($destPath) !== true) { |
521
|
|
|
//cumbersome to test |
522
|
|
|
throw new \Exception('Imagick::writeImage() did not return true');//@codeCoverageIgnore |
523
|
|
|
} |
524
|
|
|
|
525
|
|
|
if (!chmod($destPath, $fileMode)) { |
526
|
|
|
//cumbersome to test |
527
|
|
|
throw new \Exception('chmod() returned false');//@codeCoverageIgnore |
528
|
|
|
} |
529
|
|
|
} |
530
|
|
|
|
531
|
|
|
/** |
532
|
|
|
* Strips the headers (exif, etc) from an image at the given path. |
533
|
|
|
* |
534
|
|
|
* @param string $path The image path. |
535
|
|
|
* @return void |
536
|
|
|
* @throws InvalidArgumentException if $path is not a string |
537
|
|
|
* @throws \Exception if there is a failure stripping the headers |
538
|
|
|
* @throws \Exception if there is a failure writing the image back to path |
539
|
|
|
*/ |
540
|
|
|
public static function stripHeaders(string $path) |
541
|
|
|
{ |
542
|
|
|
$imagick = new \Imagick($path); |
543
|
|
|
if ($imagick->stripImage() !== true) { |
544
|
|
|
//cumbersome to test |
545
|
|
|
throw new \Exception('Imagick::stripImage() did not return true');//@codeCoverageIgnore |
546
|
|
|
} |
547
|
|
|
|
548
|
|
|
if ($imagick->writeImage($path) !== true) { |
549
|
|
|
//cumbersome to test |
550
|
|
|
throw new \Exception('Imagick::writeImage() did not return true');//@codeCoverageIgnore |
551
|
|
|
} |
552
|
|
|
} |
553
|
|
|
|
554
|
|
|
/** |
555
|
|
|
* @param \Imagick $imagick |
556
|
|
|
*/ |
557
|
|
|
private static function rotateImage(\Imagick $imagick) |
558
|
|
|
{ |
559
|
|
|
$orientation = $imagick->getImageOrientation(); |
560
|
|
|
switch ($orientation) { |
561
|
|
|
case \Imagick::ORIENTATION_BOTTOMRIGHT: |
562
|
|
|
$imagick->rotateimage('#fff', 180); |
563
|
|
|
$imagick->stripImage(); |
564
|
|
|
break; |
565
|
|
|
case \Imagick::ORIENTATION_RIGHTTOP: |
566
|
|
|
$imagick->rotateimage('#fff', 90); |
567
|
|
|
$imagick->stripImage(); |
568
|
|
|
break; |
569
|
|
|
case \Imagick::ORIENTATION_LEFTBOTTOM: |
570
|
|
|
$imagick->rotateimage('#fff', -90); |
571
|
|
|
$imagick->stripImage(); |
572
|
|
|
break; |
573
|
|
|
} |
574
|
|
|
} |
575
|
|
|
} |
576
|
|
|
|
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.