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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
154 | * @param int $quality Compression Quality. Range: [1,100] |
155 | * @return boolean|WP_Error |
156 | */ |
157 | public function set_quality( $quality = null ) { |
158 | if ( !$quality ) |
159 | $quality = $this->quality; |
160 |
|
161 | try { |
162 | if( 'image/jpeg' == $this->mime_type ) { |
163 | $this->image->setImageCompressionQuality( apply_filters( 'jpeg_quality', $quality, 'image_resize' ) ); |
164 | $this->image->setImageCompression( imagick::COMPRESSION_JPEG ); |
165 | } |
166 | else { |
167 | $this->image->setImageCompressionQuality( $quality ); |
168 | } |
169 | } |
170 | catch ( Exception $e ) { |
171 | return new WP_Error( 'image_quality_error', $e->getMessage() ); |
172 | } |