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Moved image editor class to its own file.
TODO: Improve setting max execution time code Detect openCV proper Add checkbox whether to use FD or not
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| <?php | ||
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| /** | ||
| * Extend the GD image editor class as Face_detection relies on GD | ||
| */ | ||
| class WP_Image_Editor_GD_Detect_Face extends WP_Image_Editor_GD { | ||
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| public $fd; | ||
| public $fd_file = 'detection.dat'; | ||
| public $faces; | ||
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| public function __construct( $file ) { | ||
| $this->file = $file; | ||
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| // edit dims | ||
| add_filter( 'image_resize_dimensions', array( $this, 'face_crop' ), 10, 6 ); | ||
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| // memory usage is high | ||
| add_filter( 'image_memory_limit', array( $this, 'image_memory_limit' ), 10, 1 ); | ||
| } | ||
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| /** | ||
| * Alters the crop location of the GD image editor class by detecting faces | ||
| * and centering the crop around them | ||
| * | ||
| * @param array $output The parameters for imagecopyresampled() | ||
| * @param int $orig_w Original width | ||
| * @param int $orig_h Original Height | ||
| * @param int $dest_w Target width | ||
| * @param int $dest_h Target height | ||
| * @param bool $crop Whether to crop image or not | ||
| * | ||
| * @return array | ||
| */ | ||
| public function face_crop( $output, $orig_w, $orig_h, $dest_w, $dest_h, $crop ) { | ||
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| // only need to detect if cropping | ||
| if ( $crop ) { | ||
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| // detect face | ||
| if ( $this->faces === null ) { | ||
| // prepare face detector | ||
| $this->fd = new Face_Detector( FACE_DETECT_PATH . "php-facedetection/{$this->fd_file}" ); | ||
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| // detect face if we're cropping | ||
| $this->fd->face_detect( $this->image ); | ||
| $this->faces = $this->fd->getFaces(); | ||
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| // save face data for other uses eg. tagging | ||
| if ( is_array( $this->faces ) && WP_Detect_Face::$attachment_id ) | ||
| update_post_meta( WP_Detect_Face::$attachment_id, '_faces', $this->faces ); | ||
| } | ||
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| // if we have a face | ||
| if ( is_array( $this->faces ) ) { | ||
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| // get faces area | ||
| $face_src_x = 9999999999999; | ||
| $face_src_y = 9999999999999; | ||
| $face_src_max_x = $face_src_max_w = 0; | ||
| $face_src_max_y = $face_src_max_h = 0; | ||
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| // create bounding box | ||
| foreach( $this->faces as $face ) { | ||
| // left and top most x,y | ||
| if ( $face_src_x > $face[ 'x' ] ) $face_src_x = $face[ 'x' ]; | ||
| if ( $face_src_y > $face[ 'y' ] ) $face_src_y = $face[ 'y' ]; | ||
| // right and bottom most x,y | ||
| if ( $face_src_max_x < $face[ 'x' ] + $face[ 'w' ] ) $face_src_max_x = $face[ 'x' ] + $face[ 'w' ]; | ||
| if ( $face_src_max_y < $face[ 'y' ] + $face[ 'w' ] ) $face_src_max_y = $face[ 'y' ] + $face[ 'w' ]; | ||
| } | ||
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| $face_src_w = $face_src_max_x - $face_src_x; | ||
| $face_src_h = $face_src_max_y - $face_src_y; | ||
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| // crop the largest possible portion of the original image that we can size to $dest_w x $dest_h | ||
| $aspect_ratio = $orig_w / $orig_h; | ||
| $new_w = min($dest_w, $orig_w); | ||
| $new_h = min($dest_h, $orig_h); | ||
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| if ( !$new_w ) { | ||
| $new_w = intval($new_h * $aspect_ratio); | ||
| } | ||
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| if ( !$new_h ) { | ||
| $new_h = intval($new_w / $aspect_ratio); | ||
| } | ||
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| $size_ratio = max($new_w / $orig_w, $new_h / $orig_h); | ||
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| $crop_w = round($new_w / $size_ratio); | ||
| $crop_h = round($new_h / $size_ratio); | ||
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| $src_x = floor( ($orig_w - $crop_w) / 2 ); | ||
| $src_y = floor( ($orig_h - $crop_h) / 2 ); | ||
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| // bounding box | ||
| if ( $src_x == 0 ) { | ||
| $src_y = ( $face_src_y + ($face_src_h / 2) ) - ($crop_h / 2); | ||
| $src_y = min( max( 0, $src_y ), $orig_h - $crop_h ); | ||
| } | ||
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| if ( $src_y == 0 ) { | ||
| $src_x = ( $face_src_x + ($face_src_w / 2) ) - ($crop_w / 2); | ||
| $src_x = min( max( 0, $src_x ), $orig_w - $crop_w ); | ||
| } | ||
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| // the return array matches the parameters to imagecopyresampled() | ||
| // int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h | ||
| return array( 0, 0, $src_x, $src_y, $dest_w, $dest_h, $crop_w, $crop_h ); | ||
| } | ||
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| } | ||
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| return null; | ||
| } | ||
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| /** | ||
| * Increase the max timeout and double check memory limit | ||
| * | ||
| * @param string $limit The maximum memory limit allowed by PHP | ||
| * | ||
| * @return string | ||
| */ | ||
| public function image_memory_limit( $limit ) { | ||
| @set_time_limit( 60 ); | ||
| return $limit; | ||
| } | ||
|
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| } |
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