Craft\ImagerService::_applyImageEffects PHP Метод

    private function _applyImageEffects($imageInstance, $effects)
    {
        // apply effects in the order they were entered
        foreach ($effects as $effect => $value) {
            $effect = mb_strtolower($effect);
            if ($effect == 'grayscale' || $effect == 'greyscale') {
                // we do not participate in that quarrel
                $imageInstance->effects()->grayscale();
            }
            if ($effect == 'negative') {
                $imageInstance->effects()->negative();
            }
            if ($effect == 'blur') {
                $imageInstance->effects()->blur(is_int($value) || is_float($value) ? $value : 1);
            }
            if ($effect == 'sharpen') {
                $imageInstance->effects()->sharpen();
            }
            if ($effect == 'gamma') {
                $imageInstance->effects()->gamma(is_int($value) || is_float($value) ? $value : 1);
            }
            if ($effect == 'colorize') {
                $color = $imageInstance->palette()->color($value);
                $imageInstance->effects()->colorize($color);
            }
            /**
             * Effects that are imagick only. Will be ignored if GD is used
             */
            if ($this->imageDriver == 'imagick') {
                $imagickInstance = $imageInstance->getImagick();
                // colorBlend is almost like colorize, but works with alpha and use blend modes.
                if ($effect == 'colorblend') {
                    if (is_array($value)) {
                        if (count($value) > 1) {
                            $this->_colorBlend($imagickInstance, $value[0], $value[1]);
                        } else {
                            $this->_colorBlend($imagickInstance, $value[0], 1);
                        }
                    } else {
                        $this->_colorBlend($imagickInstance, $value, 1);
                    }
                }
                // sepia, just because it's there.
                if ($effect == 'sepia') {
                    $imagickInstance->sepiaToneImage($value);
                }
                // tint
                if ($effect == 'tint' && is_array($value)) {
                    $tint = new \ImagickPixel($value[0]);
                    $opacity = new \ImagickPixel($value[1]);
                    $imagickInstance->tintImage($tint, $opacity);
                }
                // contrast
                if ($effect == 'contrast') {
                    if (is_int($value)) {
                        for ($i = 0; $i < abs($value); $i++) {
                            if ($value > 0) {
                                $imagickInstance->contrastImage(true);
                            } else {
                                $imagickInstance->contrastImage(false);
                            }
                        }
                    } else {
                        $imagickInstance->contrastImage($value);
                    }
                }
                // modulate
                if ($effect == 'modulate' && is_array($value) && count($value) == 3) {
                    $imagickInstance->modulateImage($value[0], $value[1], $value[2]);
                }
                // normalize
                if ($effect == 'normalize') {
                    $imagickInstance->normalizeImage();
                }
                // contrast stretch
                if ($effect == 'contraststretch' && is_array($value) && count($value) >= 2) {
                    $imagickInstance->contrastStretchImage($value[0], $value[1]);
                }
                // posterize
                if ($effect == 'posterize' && is_array($value) && count($value) == 2) {
                    $imagickInstance->posterizeImage($value[0], isset(ImagerService::$ditherKeyTranslate[$value[1]]) ? ImagerService::$ditherKeyTranslate[$value[1]] : \Imagick::DITHERMETHOD_NO);
                }
                // unsharpMask
                if ($effect == 'unsharpmask' && is_array($value) && count($value) == 4) {
                    $imagickInstance->unsharpMaskImage($value[0], $value[1], $value[2], $value[3]);
                }
                // vignette
                // todo : make a better vignette
                if ($effect == 'vignette' && is_array($value) && count($value) >= 3) {
                    $this->_vignette($imagickInstance, $value[0], $value[1], $value[2]);
                }
                // custom filter
                if ($effect == 'customfilter') {
                    $this->_applyCustomFilter($imagickInstance, $value);
                }
            }
        }
    }