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<?php declare(strict_types=1); namespace Intervention\Image\Drivers\Gd\Modifiers; use Intervention\Image\Interfaces\ImageInterface; use Intervention\Image\Interfaces\SpecializedInterface; use Intervention\Image\Modifiers\SharpenModifier as GenericSharpenModifier; class SharpenModifier extends GenericSharpenModifier implements SpecializedInterface { /** * {@inheritdoc} * * @see ModifierInterface::apply() */ public function apply(ImageInterface $image): ImageInterface { $matrix = $this->matrix(); foreach ($image as $frame) { imageconvolution($frame->native(), $matrix, 1, 0); } return $image; } /** * Create matrix to be used by imageconvolution() * * @return array<array<float>> */ private function matrix(): array { $min = $this->amount >= 10 ? $this->amount * -0.01 : 0; $max = $this->amount * -0.025; $abs = ((4 * $min + 4 * $max) * -1) + 1; return [ [$min, $max, $min], [$max, $abs, $max], [$min, $max, $min] ]; } }
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