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<?php declare(strict_types = 1); namespace BaconQrCode\Renderer\Image; use BaconQrCode\Exception\RuntimeException; use BaconQrCode\Renderer\Color\Alpha; use BaconQrCode\Renderer\Color\Cmyk; use BaconQrCode\Renderer\Color\ColorInterface; use BaconQrCode\Renderer\Color\Gray; use BaconQrCode\Renderer\Color\Rgb; use BaconQrCode\Renderer\Path\Close; use BaconQrCode\Renderer\Path\Curve; use BaconQrCode\Renderer\Path\EllipticArc; use BaconQrCode\Renderer\Path\Line; use BaconQrCode\Renderer\Path\Move; use BaconQrCode\Renderer\Path\Path; use BaconQrCode\Renderer\RendererStyle\Gradient; use BaconQrCode\Renderer\RendererStyle\GradientType; use Imagick; use ImagickDraw; use ImagickPixel; final class ImagickImageBackEnd implements ImageBackEndInterface { /** * @var string */ private $imageFormat; /** * @var int */ private $compressionQuality; /** * @var Imagick|null */ private $image; /** * @var ImagickDraw|null */ private $draw; /** * @var int|null */ private $gradientCount; /** * @var TransformationMatrix[]|null */ private $matrices; /** * @var int|null */ private $matrixIndex; public function __construct(string $imageFormat = 'png', int $compressionQuality = 100) { if (! class_exists(Imagick::class)) { throw new RuntimeException('You need to install the imagick extension to use this back end'); } $this->imageFormat = $imageFormat; $this->compressionQuality = $compressionQuality; } public function new(int $size, ColorInterface $backgroundColor) : void { $this->image = new Imagick(); $this->image->newImage($size, $size, $this->getColorPixel($backgroundColor)); $this->image->setImageFormat($this->imageFormat); $this->image->setCompressionQuality($this->compressionQuality); $this->draw = new ImagickDraw(); $this->gradientCount = 0; $this->matrices = [new TransformationMatrix()]; $this->matrixIndex = 0; } public function scale(float $size) : void { if (null === $this->draw) { throw new RuntimeException('No image has been started'); } $this->draw->scale($size, $size); $this->matrices[$this->matrixIndex] = $this->matrices[$this->matrixIndex] ->multiply(TransformationMatrix::scale($size)); } public function translate(float $x, float $y) : void { if (null === $this->draw) { throw new RuntimeException('No image has been started'); } $this->draw->translate($x, $y); $this->matrices[$this->matrixIndex] = $this->matrices[$this->matrixIndex] ->multiply(TransformationMatrix::translate($x, $y)); } public function rotate(int $degrees) : void { if (null === $this->draw) { throw new RuntimeException('No image has been started'); } $this->draw->rotate($degrees); $this->matrices[$this->matrixIndex] = $this->matrices[$this->matrixIndex] ->multiply(TransformationMatrix::rotate($degrees)); } public function push() : void { if (null === $this->draw) { throw new RuntimeException('No image has been started'); } $this->draw->push(); $this->matrices[++$this->matrixIndex] = $this->matrices[$this->matrixIndex - 1]; } public function pop() : void { if (null === $this->draw) { throw new RuntimeException('No image has been started'); } $this->draw->pop(); unset($this->matrices[$this->matrixIndex--]); } public function drawPathWithColor(Path $path, ColorInterface $color) : void { if (null === $this->draw) { throw new RuntimeException('No image has been started'); } $this->draw->setFillColor($this->getColorPixel($color)); $this->drawPath($path); } public function drawPathWithGradient( Path $path, Gradient $gradient, float $x, float $y, float $width, float $height ) : void { if (null === $this->draw) { throw new RuntimeException('No image has been started'); } $this->draw->setFillPatternURL('#' . $this->createGradientFill($gradient, $x, $y, $width, $height)); $this->drawPath($path); } public function done() : string { if (null === $this->draw) { throw new RuntimeException('No image has been started'); } $this->image->drawImage($this->draw); $blob = $this->image->getImageBlob(); $this->draw->clear(); $this->image->clear(); $this->draw = null; $this->image = null; $this->gradientCount = null; return $blob; } private function drawPath(Path $path) : void { $this->draw->pathStart(); foreach ($path as $op) { switch (true) { case $op instanceof Move: $this->draw->pathMoveToAbsolute($op->getX(), $op->getY()); break; case $op instanceof Line: $this->draw->pathLineToAbsolute($op->getX(), $op->getY()); break; case $op instanceof EllipticArc: $this->draw->pathEllipticArcAbsolute( $op->getXRadius(), $op->getYRadius(), $op->getXAxisAngle(), $op->isLargeArc(), $op->isSweep(), $op->getX(), $op->getY() ); break; case $op instanceof Curve: $this->draw->pathCurveToAbsolute( $op->getX1(), $op->getY1(), $op->getX2(), $op->getY2(), $op->getX3(), $op->getY3() ); break; case $op instanceof Close: $this->draw->pathClose(); break; default: throw new RuntimeException('Unexpected draw operation: ' . get_class($op)); } } $this->draw->pathFinish(); } private function createGradientFill(Gradient $gradient, float $x, float $y, float $width, float $height) : string { list($width, $height) = $this->matrices[$this->matrixIndex]->apply($width, $height); $startColor = $this->getColorPixel($gradient->getStartColor())->getColorAsString(); $endColor = $this->getColorPixel($gradient->getEndColor())->getColorAsString(); $gradientImage = new Imagick(); switch ($gradient->getType()) { case GradientType::HORIZONTAL(): $gradientImage->newPseudoImage((int) $height, (int) $width, sprintf( 'gradient:%s-%s', $startColor, $endColor )); $gradientImage->rotateImage('transparent', -90); break; case GradientType::VERTICAL(): $gradientImage->newPseudoImage((int) $width, (int) $height, sprintf( 'gradient:%s-%s', $startColor, $endColor )); break; case GradientType::DIAGONAL(): case GradientType::INVERSE_DIAGONAL(): $gradientImage->newPseudoImage((int) ($width * sqrt(2)), (int) ($height * sqrt(2)), sprintf( 'gradient:%s-%s', $startColor, $endColor )); if (GradientType::DIAGONAL() === $gradient->getType()) { $gradientImage->rotateImage('transparent', -45); } else { $gradientImage->rotateImage('transparent', -135); } $rotatedWidth = $gradientImage->getImageWidth(); $rotatedHeight = $gradientImage->getImageHeight(); $gradientImage->setImagePage($rotatedWidth, $rotatedHeight, 0, 0); $gradientImage->cropImage( intdiv($rotatedWidth, 2) - 2, intdiv($rotatedHeight, 2) - 2, intdiv($rotatedWidth, 4) + 1, intdiv($rotatedWidth, 4) + 1 ); break; case GradientType::RADIAL(): $gradientImage->newPseudoImage((int) $width, (int) $height, sprintf( 'radial-gradient:%s-%s', $startColor, $endColor )); break; } $id = sprintf('g%d', ++$this->gradientCount); $this->draw->pushPattern($id, 0, 0, $width, $height); $this->draw->composite(Imagick::COMPOSITE_COPY, 0, 0, $width, $height, $gradientImage); $this->draw->popPattern(); return $id; } private function getColorPixel(ColorInterface $color) : ImagickPixel { $alpha = 100; if ($color instanceof Alpha) { $alpha = $color->getAlpha(); $color = $color->getBaseColor(); } if ($color instanceof Rgb) { return new ImagickPixel(sprintf( 'rgba(%d, %d, %d, %F)', $color->getRed(), $color->getGreen(), $color->getBlue(), $alpha / 100 )); } if ($color instanceof Cmyk) { return new ImagickPixel(sprintf( 'cmyka(%d, %d, %d, %d, %F)', $color->getCyan(), $color->getMagenta(), $color->getYellow(), $color->getBlack(), $alpha / 100 )); } if ($color instanceof Gray) { return new ImagickPixel(sprintf( 'graya(%d%%, %F)', $color->getGray(), $alpha / 100 )); } return $this->getColorPixel(new Alpha($alpha, $color->toRgb())); } }
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