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<?php /** * BaconQrCode * * @link http://github.com/Bacon/BaconQrCode For the canonical source repository * @copyright 2013 Ben 'DASPRiD' Scholzen * @license http://opensource.org/licenses/BSD-2-Clause Simplified BSD License */ namespace BaconQrCode\Renderer\Image; use BaconQrCode\Exception; use BaconQrCode\Renderer\Color\ColorInterface; /** * PNG backend. */ class Png extends AbstractRenderer { /** * Image resource used when drawing. * * @var resource */ protected $image; /** * Colors used for drawing. * * @var array */ protected $colors = array(); /** * init(): defined by RendererInterface. * * @see ImageRendererInterface::init() * @return void */ public function init() { $this->image = imagecreatetruecolor($this->finalWidth, $this->finalHeight); } /** * addColor(): defined by RendererInterface. * * @see ImageRendererInterface::addColor() * @param string $id * @param ColorInterface $color * @return void * @throws Exception\RuntimeException */ public function addColor($id, ColorInterface $color) { if ($this->image === null) { throw new Exception\RuntimeException('Colors can only be added after init'); } $color = $color->toRgb(); $this->colors[$id] = imagecolorallocate( $this->image, $color->getRed(), $color->getGreen(), $color->getBlue() ); } /** * drawBackground(): defined by RendererInterface. * * @see ImageRendererInterface::drawBackground() * @param string $colorId * @return void */ public function drawBackground($colorId) { imagefill($this->image, 0, 0, $this->colors[$colorId]); } /** * drawBlock(): defined by RendererInterface. * * @see ImageRendererInterface::drawBlock() * @param integer $x * @param integer $y * @param string $colorId * @return void */ public function drawBlock($x, $y, $colorId) { imagefilledrectangle( $this->image, $x, $y, $x + $this->blockSize - 1, $y + $this->blockSize - 1, $this->colors[$colorId] ); } /** * getByteStream(): defined by RendererInterface. * * @see ImageRendererInterface::getByteStream() * @return string */ public function getByteStream() { ob_start(); imagepng($this->image); return ob_get_clean(); } }