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<?php |
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declare(strict_types=1); |
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namespace Minepic\Image\Sections; |
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use Minepic\Image\ImageSection; |
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use Minepic\Image\Point; |
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use Minepic\Image\Sections\Avatar\Coordinates as AvatarCoordinates; |
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/** |
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* Class Avatar. |
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*/ |
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class Avatar extends ImageSection |
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{ |
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/** |
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* Max Standard Deviation value for helm check. |
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*/ |
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private const DEFAULT_STANDARD_DEVIATION = 0.2; |
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/** |
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* Mean Alpha value (Helm). |
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* |
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* @var int |
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*/ |
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private int $meanAlpha = 0; |
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/** |
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* Red Standard Deviation value (Helm). |
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* |
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* @var float |
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*/ |
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private float $redStdDev = 0.0; |
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/** |
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* Green Standard Deviation value (Helm). |
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* |
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* @var float |
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*/ |
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private float $greenStdDev = 0.0; |
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/** |
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* Blue Standard Deviation value (Helm). |
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* |
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* @var float |
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*/ |
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private float $blueStdDev = 0; |
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/** |
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* Calculate sttdev for merging helm. |
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* |
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* @param $headSection |
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*/ |
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protected function calculateHelmStandardDeviation($headSection): void |
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{ |
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// Check for helm image |
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$allRed = []; |
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$allGreen = []; |
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$allBlue = []; |
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$allAlpha = []; |
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$x = 0; |
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while ($x < 8) { |
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$y = 0; |
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while ($y < 8) { |
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$color = \imagecolorat($headSection, $x, $y); |
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$colors = \imagecolorsforindex($headSection, $color); |
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$allRed[] = $colors['red']; |
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$allGreen[] = $colors['green']; |
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$allBlue[] = $colors['blue']; |
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$allAlpha[] = $colors['alpha']; |
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++$y; |
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} |
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++$x; |
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} |
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// mean value for each color |
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$meanRed = \array_sum($allRed) / 64; |
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$meanGreen = \array_sum($allGreen) / 64; |
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$meanBlue = \array_sum($allBlue) / 64; |
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$this->meanAlpha = (int) \round(\array_sum($allAlpha) / 64); |
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// Arrays deviation |
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$devsRed = []; |
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$devsGreen = []; |
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$devsBlue = []; |
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$i = 0; |
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while ($i < 64) { |
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$devsRed[] = ($allRed[$i] - $meanRed) ** 2; |
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$devsGreen[] = ($allGreen[$i] - $meanGreen) ** 2; |
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$devsBlue[] = ($allBlue[$i] - $meanBlue) ** 2; |
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++$i; |
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} |
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// stddev for each color |
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$this->redStdDev = \sqrt(\array_sum($devsRed) / 64); |
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$this->greenStdDev = \sqrt(\array_sum($devsGreen) / 64); |
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$this->blueStdDev = \sqrt(\array_sum($devsBlue) / 64); |
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} |
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/** |
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* Checks if base image has helm for section. |
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* |
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* @param resource $baseSkinImage |
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* @param Point $helmCoordinates |
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* |
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* @throws \Minepic\Image\Exceptions\ImageTrueColorCreationFailedException |
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* |
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* @return bool |
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*/ |
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private function hasHelm($baseSkinImage, Point $helmCoordinates): bool |
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{ |
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$helmCheckImage = $this->createHelmCheckImage($baseSkinImage, $helmCoordinates); |
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$this->calculateHelmStandardDeviation($helmCheckImage); |
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return $this->isValidHelmStandardDeviation() || $this->meanAlpha === 127; |
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} |
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/** |
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* @return bool |
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*/ |
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private function isValidHelmStandardDeviation(): bool |
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{ |
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return ($this->redStdDev > self::DEFAULT_STANDARD_DEVIATION && $this->greenStdDev > self::DEFAULT_STANDARD_DEVIATION) || |
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($this->redStdDev > self::DEFAULT_STANDARD_DEVIATION && $this->blueStdDev > self::DEFAULT_STANDARD_DEVIATION) || |
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($this->greenStdDev > self::DEFAULT_STANDARD_DEVIATION && $this->blueStdDev > self::DEFAULT_STANDARD_DEVIATION); |
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} |
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/** |
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* Render avatar image. |
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* |
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* @param int $size Avatar size |
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* @param string $type Section rendered |
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* |
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* @throws \Minepic\Image\Exceptions\ImageCreateFromPngFailedException |
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* @throws \Minepic\Image\Exceptions\ImageTrueColorCreationFailedException |
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*/ |
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public function render(int $size = 0, string $type = self::FRONT): void |
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{ |
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if ($size <= 0 || $size > (int) env('MAX_AVATAR_SIZE')) { |
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$size = (int) env('DEFAULT_AVATAR_SIZE'); |
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} |
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// generate png from url/path |
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$baseSkinImage = $this->createImageFromPng($this->skinPath); |
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\imagealphablending($baseSkinImage, false); |
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\imagesavealpha($baseSkinImage, true); |
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// Head |
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$this->imgResource = $this->createTrueColorSquare($size); |
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// Sections Coordinates |
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$faceCoordinates = AvatarCoordinates::getAvatarSection($type); |
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$helmCoordinates = AvatarCoordinates::getHelmSection($type); |
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\imagecopyresampled($this->imgResource, $baseSkinImage, 0, 0, $faceCoordinates->getX(), $faceCoordinates->getY(), $size, $size, 8, 8); |
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// if all pixel have transparency or the colors are not the same |
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if ($this->hasHelm($baseSkinImage, $helmCoordinates)) { |
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$helm = $this->createTrueColorSquare($size); |
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\imagealphablending($helm, false); |
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\imagesavealpha($helm, true); |
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\imagefilledrectangle($helm, 0, 0, $size, $size, $this->colorAllocateAlpha($helm)); |
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\imagecopyresampled($helm, $baseSkinImage, 0, 0, $helmCoordinates->getX(), $helmCoordinates->getY(), $size, $size, 8, 8); |
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$merge = $this->createTrueColorSquare($size); |
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\imagecopy($merge, $this->imgResource, 0, 0, 0, 0, $size, $size); |
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\imagecopy($merge, $helm, 0, 0, 0, 0, $size, $size); |
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\imagecopymerge($this->imgResource, $merge, 0, 0, 0, 0, $size, $size, 0); |
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$this->imgResource = $merge; |
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unset($merge); |
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} |
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} |
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/** |
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* @param $image |
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* @param \Minepic\Image\Point $helmCoordinates |
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* |
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* @throws \Minepic\Image\Exceptions\ImageTrueColorCreationFailedException |
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* |
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* @return resource |
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*/ |
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public function createHelmCheckImage($image, Point $helmCoordinates) |
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{ |
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$helmCheckImage = $this->createTrueColorSquare(8); |
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\imagealphablending($helmCheckImage, false); |
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\imagesavealpha($helmCheckImage, true); |
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\imagefilledrectangle($helmCheckImage, 0, 0, 8, 8, $this->colorAllocateAlpha($helmCheckImage)); |
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\imagecopyresampled($helmCheckImage, $image, 0, 0, $helmCoordinates->getX(), $helmCoordinates->getY(), 8, 8, 8, 8); |
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return $helmCheckImage; |
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} |
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} |
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mattiabasone /
minepic
