/**
* Applies a smooth filter.
*
* @access public
* @since 8.1
* @url http://www.tuxradar.com/practicalphp/11/2/15
* @param integer $level -100 = max smooth, 100 = min smooth
*
* @return mixed bool | object WP_Error
*/
public function smooth($level = 0)
{
$level = (double) cnUtility::remapRange($level, -100, 100, -8, 8);
if ($level >= -8 && $level <= 8 && filter_var($level, FILTER_VALIDATE_FLOAT) !== FALSE) {
if (function_exists('imagefilter')) {
if (imagefilter($this->image, IMG_FILTER_SMOOTH, $level)) {
return TRUE;
}
}
}
return new WP_Error('image_smooth_error', __('Image smooth failed.', 'connections'), $this->file);
}
/**
* Adjust the image contrast.
*
* @access public
* @since 8.1
* @param integer $level -100 = max contrast, 0 = no change, +100 = min contrast (note the direction!)
*
* @return object Imagick | WP_Error
*/
public function contrast($level)
{
if ($level >= -100 && $level <= 100 && filter_var($level, FILTER_VALIDATE_FLOAT) !== FALSE) {
try {
$sharpen = $level <= 0 ? TRUE : FALSE;
$midpoint = cnUtility::remapRange($level, -100, 100, -20, 20);
$quanta = $this->image->getQuantumRange();
return $this->image->sigmoidalContrastImage($sharpen, abs($midpoint), 0.5 * $quanta["quantumRangeLong"]);
} catch (Exception $e) {
return new WP_Error('image_contrast_error', $e->getMessage(), $this->file);
}
}
return new WP_Error('image_contrast_error', __('Image contrast failed.', 'connections'), $this->file);
}
