BFI_Image_Editor_Imagick_1_3

	class BFI_Image_Editor_Imagick_1_3 extends WP_Image_Editor_Imagick {

		/** Changes the opacity of the image
		 *
		 * @supports 3.5.1
		 * @access   public
		 *
		 * @param float $opacity (0.0-1.0)
		 *
		 * @return boolean|WP_Error
		 */
		public function opacity( $opacity ) {
			$opacity /= 100;

			try {
				// From: http://stackoverflow.com/questions/3538851/php-imagick-setimageopacity-destroys-transparency-and-does-nothing
				// preserves transparency
				//$this->image->setImageOpacity($opacity);
				return $this->image->evaluateImage( Imagick::EVALUATE_MULTIPLY, $opacity, Imagick::CHANNEL_ALPHA );
			} catch ( Exception $e ) {
				return new WP_Error( 'image_opacity_error', $e->getMessage() );
			}
		}

		/** Tints the image a different color
		 *
		 * @supports 3.5.1
		 * @access   public
		 *
		 * @param string hex color e.g. #ff00ff
		 *
		 * @return boolean|WP_Error
		 */
		public function colorize( $hexColor ) {
			try {
				return $this->image->colorizeImage( $hexColor, 1.0 );
			} catch ( Exception $e ) {
				return new WP_Error( 'image_colorize_error', $e->getMessage() );
			}
		}

		/** Makes the image grayscale
		 *
		 * @supports 3.5.1
		 * @access   public
		 *
		 * @return boolean|WP_Error
		 */
		public function grayscale() {
			try {
				return $this->image->modulateImage( 100, 0, 100 );
			} catch ( Exception $e ) {
				return new WP_Error( 'image_grayscale_error', $e->getMessage() );
			}
		}

		/** Negates the image
		 *
		 * @supports 3.5.1
		 * @access   public
		 *
		 * @return boolean|WP_Error
		 */
		public function negate() {
			try {
				return $this->image->negateImage( false );
			} catch ( Exception $e ) {
				return new WP_Error( 'image_negate_error', $e->getMessage() );
			}
		}
	}