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<?php |
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namespace AmaTeam\Image\Projection\Conversion\Processor; |
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use AmaTeam\Image\Projection\API\Conversion\ProcessorInterface; |
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use AmaTeam\Image\Projection\API\Image\ImageFactoryInterface; |
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use AmaTeam\Image\Projection\API\SpecificationInterface; |
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use AmaTeam\Image\Projection\API\Tile\TileInterface; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\ColorGrid; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\EdgeLumaCalculator; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\EdgeOrientationCalculator; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\EdgeDistanceCalculator; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\Edge; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\EdgeDirectionCalculator; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\LumaGrid; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\SubPixelOffsetCalculator; |
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use AmaTeam\Image\Projection\Conversion\Processor\FXAA\TargetColorCalculator; |
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use AmaTeam\Image\Projection\Image\Utility\Color; |
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use AmaTeam\Image\Projection\Tile\Tile; |
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/** |
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* @see https://developer.download.nvidia.com/assets/gamedev/files/sdk/11/FXAA_WhitePaper.pdf |
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* @see http://blog.simonrodriguez.fr/articles/30-07-2016_implementing_fxaa.html |
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*/ |
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class FXAAProcessor implements ProcessorInterface |
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{ |
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const DEBUG_OFF = 0; |
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const DEBUG_EDGE = 1; |
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// Horizontal edges are |
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const DEBUG_ORIENTATION = 2; |
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// Edge is painted in blue, it's contrast opposite - in green |
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const DEBUG_PAIR = 3; |
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const EDGE_THRESHOLD_TOO_LITTLE = 1 / 3; |
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const EDGE_THRESHOLD_LOW_QUALITY = 1 / 4; |
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const EDGE_THRESHOLD_HIGH_QUALITY = 1 / 8; |
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const EDGE_THRESHOLD_OVERKILL = 1 / 16; |
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const MINIMUM_EDGE_THRESHOLD_VISIBLE_LIMIT = 1 / 32; |
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const MINIMUM_EDGE_THRESHOLD_HIGH_QUALITY = 1 / 16; |
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const MINIMUM_EDGE_THRESHOLD_UPPER_LIMIT = 1 / 12; |
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private $edgeThreshold = self::EDGE_THRESHOLD_LOW_QUALITY; |
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private $minimumEdgeThreshold = self::MINIMUM_EDGE_THRESHOLD_HIGH_QUALITY; |
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private $debug = self::DEBUG_OFF; |
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/** |
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* @var ImageFactoryInterface |
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*/ |
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private $imageFactory; |
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/** |
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* @param ImageFactoryInterface $imageFactory |
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*/ |
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public function __construct(ImageFactoryInterface $imageFactory) |
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{ |
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$this->imageFactory = $imageFactory; |
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} |
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/** |
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* @return float|int |
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*/ |
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public function getEdgeThreshold() |
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{ |
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return $this->edgeThreshold; |
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} |
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/** |
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* @param float|int $edgeThreshold |
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* @return $this |
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*/ |
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public function setEdgeThreshold($edgeThreshold) |
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{ |
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$this->edgeThreshold = $edgeThreshold; |
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return $this; |
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} |
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/** |
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* @return float|int |
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*/ |
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public function getMinimumEdgeThreshold() |
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{ |
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return $this->minimumEdgeThreshold; |
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} |
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/** |
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* @param float|int $minimumEdgeThreshold |
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* @return $this |
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*/ |
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public function setMinimumEdgeThreshold($minimumEdgeThreshold) |
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{ |
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$this->minimumEdgeThreshold = $minimumEdgeThreshold; |
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return $this; |
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} |
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/** |
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* @inheritDoc |
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* |
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* @SuppressWarnings(PHPMD.CyclomaticComplexity) |
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*/ |
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public function process(TileInterface $tile, SpecificationInterface $specification) |
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{ |
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$image = $tile->getImage(); |
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$width = $image->getWidth(); |
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$height = $image->getHeight(); |
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$colorGrid = new ColorGrid(); |
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$lumaGrid = new LumaGrid(); |
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$target = $this->imageFactory->create($width, $height); |
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$edge = new Edge(); |
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$edge->image = $image; |
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$edge->color = $colorGrid; |
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$edge->luma = $lumaGrid; |
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for ($x = 0; $x < $width; $x++) { |
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for ($y = 0; $y < $height; $y++) { |
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$edge->x = $x; |
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$edge->y = $y; |
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// Gathering 3x3 grid data |
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$colorGrid->fill($image, $x, $y); |
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$lumaGrid->fill($colorGrid); |
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// High luma range tells there is an edge in 3x3 box |
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if ($lumaGrid->range < max($lumaGrid->max * $this->edgeThreshold, $this->minimumEdgeThreshold)) { |
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// So if there's no such thing, let's just jump to next pixel |
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$target->setColorAt($x, $y, $colorGrid->center); |
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continue; |
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} |
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EdgeOrientationCalculator::apply($edge); |
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EdgeDirectionCalculator::apply($edge); |
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EdgeLumaCalculator::apply($edge); |
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EdgeDistanceCalculator::apply($edge); |
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$offset = SubPixelOffsetCalculator::calculate($edge); |
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switch ($this->debug) { |
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case self::DEBUG_EDGE: |
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$alpha = (int) ($offset * 2 * 255); |
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$yellow = 0xFFFF00FF; |
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$yellow = $yellow & ($alpha | 0xFFFFFF00); |
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$color = Color::blend(0xFF0000FF, $yellow); |
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$target->setColorAt($x, $y, $color); |
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break; |
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case self::DEBUG_ORIENTATION: |
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$color = $edge->horizontal ? 0xFFFF00FF : 0x0000FFFF; |
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$target->setColorAt($x, $y, $color); |
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break; |
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case self::DEBUG_PAIR: |
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$target->setColorAt($x, $y, 0x0000FFFF); |
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$value = $edge->inward ? -1 : 1; |
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$xOffset = $edge->horizontal ? 0 : $value; |
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$yOffset = $edge->horizontal ? $value : 0; |
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$target->setColorAt($x + $xOffset, $y + $yOffset, 0x00FF00FF); |
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break; |
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default: |
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$color = TargetColorCalculator::calculate($edge, $offset); |
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$target->setColorAt($x, $y, $color); |
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} |
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} |
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} |
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return new Tile($tile->getPosition(), $target); |
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} |
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public function setDebugMode($mode) |
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{ |
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$this->debug = $mode; |
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return $this; |
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} |
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} |
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ama-team /
php-projection-framework
