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<?php |
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class ImageOrientationFixer extends DataExtension { |
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public function onBeforeWrite() { |
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$ext = $this->owner->getExtension(); |
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if ($ext == 'jpg') { |
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$path = $this->owner->getFullPath(); |
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if ($orientation = $this->get_orientation($path)) { |
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if (extension_loaded('imagick')) { |
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$this->rotate_imagick($path, $orientation); |
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} elseif (extension_loaded('gd')) { |
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$this->rotate_gd($path, $orientation); |
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} |
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} |
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} |
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parent::onBeforeWrite(); |
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} |
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private function get_orientation($path) { |
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$exif_data = exif_read_data($path); |
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$orientation = !empty($exif_data['Orientation']) ? $exif_data['Orientation'] : null; |
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/** |
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* this image will help you understand the orientation and the difference between encoded and printed |
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* http://www.kendawson.ca/wp-content/uploads/orient_flag2.gif |
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*/ |
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return $orientation == 1 ? false : $orientation; |
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} |
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private function rotate_imagick($imagePath, $orientation) { |
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$imagick = new Imagick($imagePath); |
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$imagick->setImageOrientation(imagick::ORIENTATION_TOPLEFT); |
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$deg = 0; |
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switch ($orientation) { |
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case 3: |
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$deg = -180; |
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break; |
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case 6: |
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$deg = 90; |
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break; |
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case 8: |
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$deg = -90; |
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break; |
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} |
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$imagick->rotateImage(new ImagickPixel('#00000000'), $deg); |
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$imagick->writeImage($imagePath); |
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$imagick->clear(); |
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$imagick->destroy(); |
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} |
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private function rotate_gd($path, $orientation) { |
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$imgInfo = getimagesize($path); |
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switch ($imgInfo[2]) { |
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case 1: |
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$image = imagecreatefromgif($path); |
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break; |
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case 2: |
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$image = imagecreatefromjpeg($path); |
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break; |
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case 3: |
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$image = imagecreatefrompng($path); |
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break; |
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default: |
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return false; |
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} |
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switch ($orientation) { |
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case 3: |
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$image = imagerotate($image, 180, 0); |
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break; |
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case 6: |
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$image = imagerotate($image, -90, 0); |
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break; |
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case 8: |
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$image = imagerotate($image, 90, 0); |
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break; |
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} |
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switch ($imgInfo[2]) { |
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case 1: |
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imagegif($image, $path); |
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break; |
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case 2: |
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imagejpeg($image, $path, 100); |
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break; |
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case 3: |
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imagepng($image, $path); |
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break; |
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default: |
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imagedestroy($image); |
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return false; |
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} |
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imagedestroy($image); |
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return true; |
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} |
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} |
salted-herring /
image-orientation-fixer
