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429 lines
9.8 KiB
PHP
429 lines
9.8 KiB
PHP
<?php
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/**
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* Class QRGdImage
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*
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* @created 05.12.2015
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* @author Smiley <smiley@chillerlan.net>
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* @copyright 2015 Smiley
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* @license MIT
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*
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* @noinspection PhpComposerExtensionStubsInspection
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*/
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namespace chillerlan\QRCode\Output;
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use chillerlan\QRCode\Data\QRMatrix;
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use chillerlan\Settings\SettingsContainerInterface;
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use ErrorException;
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use Throwable;
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use function array_values;
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use function count;
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use function extension_loaded;
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use function imagebmp;
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use function imagecolorallocate;
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use function imagecolortransparent;
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use function imagecreatetruecolor;
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use function imagedestroy;
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use function imagefilledellipse;
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use function imagefilledrectangle;
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use function imagegif;
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use function imagejpeg;
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use function imagepng;
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use function imagescale;
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use function imagetypes;
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use function imagewebp;
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use function intdiv;
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use function intval;
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use function is_array;
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use function is_numeric;
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use function max;
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use function min;
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use function ob_end_clean;
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use function ob_get_contents;
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use function ob_start;
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use function restore_error_handler;
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use function set_error_handler;
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use function sprintf;
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use const IMG_BMP;
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use const IMG_GIF;
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use const IMG_JPG;
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use const IMG_PNG;
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use const IMG_WEBP;
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/**
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* Converts the matrix into GD images, raw or base64 output (requires ext-gd)
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*
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* @see https://php.net/manual/book.image.php
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*
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* @deprecated 5.0.0 this class will be made abstract in future versions,
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* calling it directly is deprecated - use one of the child classes instead
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* @see https://github.com/chillerlan/php-qrcode/issues/223
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*/
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class QRGdImage extends QROutputAbstract{
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/**
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* The GD image resource
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*
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* @see imagecreatetruecolor()
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* @var resource|\GdImage
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*
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* @todo: add \GdImage type in v6
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*/
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protected $image;
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/**
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* The allocated background color
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*
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* @see \imagecolorallocate()
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*/
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protected int $background;
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/**
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* Whether we're running in upscale mode (scale < 20)
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*
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* @see \chillerlan\QRCode\QROptions::$drawCircularModules
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*/
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protected bool $upscaled = false;
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/**
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* @inheritDoc
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*
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* @throws \chillerlan\QRCode\Output\QRCodeOutputException
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* @noinspection PhpMissingParentConstructorInspection
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*/
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public function __construct(SettingsContainerInterface $options, QRMatrix $matrix){
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$this->options = $options;
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$this->matrix = $matrix;
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$this->checkGD();
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if($this->options->invertMatrix){
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$this->matrix->invert();
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}
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$this->copyVars();
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$this->setMatrixDimensions();
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}
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/**
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* Checks whether GD is installed and if the given mode is supported
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*
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* @return void
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* @throws \chillerlan\QRCode\Output\QRCodeOutputException
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* @codeCoverageIgnore
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*/
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protected function checkGD():void{
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if(!extension_loaded('gd')){
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throw new QRCodeOutputException('ext-gd not loaded');
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}
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$modes = [
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self::GDIMAGE_BMP => IMG_BMP,
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self::GDIMAGE_GIF => IMG_GIF,
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self::GDIMAGE_JPG => IMG_JPG,
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self::GDIMAGE_PNG => IMG_PNG,
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self::GDIMAGE_WEBP => IMG_WEBP,
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];
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// likely using default or custom output
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if(!isset($modes[$this->options->outputType])){
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return;
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}
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$mode = $modes[$this->options->outputType];
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if((imagetypes() & $mode) !== $mode){
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throw new QRCodeOutputException(sprintf('output mode "%s" not supported', $this->options->outputType));
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}
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}
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/**
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* @inheritDoc
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*/
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public static function moduleValueIsValid($value):bool{
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if(!is_array($value) || count($value) < 3){
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return false;
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}
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// check the first 3 values of the array
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foreach(array_values($value) as $i => $val){
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if($i > 2){
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break;
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}
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if(!is_numeric($val)){
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return false;
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}
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}
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return true;
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}
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/**
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* @param array $value
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*
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* @inheritDoc
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* @throws \chillerlan\QRCode\Output\QRCodeOutputException
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*/
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protected function prepareModuleValue($value):int{
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$values = [];
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foreach(array_values($value) as $i => $val){
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if($i > 2){
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break;
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}
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$values[] = max(0, min(255, intval($val)));
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}
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/** @phan-suppress-next-line PhanParamTooFewInternalUnpack */
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$color = imagecolorallocate($this->image, ...$values);
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if($color === false){
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throw new QRCodeOutputException('could not set color: imagecolorallocate() error');
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}
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return $color;
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}
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/**
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* @inheritDoc
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*/
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protected function getDefaultModuleValue(bool $isDark):int{
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return $this->prepareModuleValue(($isDark) ? [0, 0, 0] : [255, 255, 255]);
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}
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/**
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* @inheritDoc
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*
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* @return string|resource|\GdImage
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*
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* @phan-suppress PhanUndeclaredTypeReturnType, PhanTypeMismatchReturn
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* @throws \ErrorException
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*/
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public function dump(?string $file = null){
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set_error_handler(function(int $errno, string $errstr):bool{
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throw new ErrorException($errstr, $errno);
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});
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$this->image = $this->createImage();
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// set module values after image creation because we need the GdImage instance
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$this->setModuleValues();
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$this->setBgColor();
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imagefilledrectangle($this->image, 0, 0, $this->length, $this->length, $this->background);
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$this->drawImage();
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if($this->upscaled){
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// scale down to the expected size
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$this->image = imagescale($this->image, ($this->length / 10), ($this->length / 10));
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$this->upscaled = false;
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}
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// set transparency after scaling, otherwise it would be undone
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// @see https://www.php.net/manual/en/function.imagecolortransparent.php#77099
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$this->setTransparencyColor();
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if($this->options->returnResource){
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restore_error_handler();
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return $this->image;
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}
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$imageData = $this->dumpImage();
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$this->saveToFile($imageData, $file);
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if($this->options->outputBase64){
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// @todo: remove mime parameter in v6
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$imageData = $this->toBase64DataURI($imageData, 'image/'.$this->options->outputType);
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}
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restore_error_handler();
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return $imageData;
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}
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/**
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* Creates a new GdImage resource and scales it if necessary
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*
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* we're scaling the image up in order to draw crisp round circles, otherwise they appear square-y on small scales
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*
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* @see https://github.com/chillerlan/php-qrcode/issues/23
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*
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* @return \GdImage|resource
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*/
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protected function createImage(){
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if($this->drawCircularModules && $this->options->gdImageUseUpscale && $this->options->scale < 20){
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// increase the initial image size by 10
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$this->length *= 10;
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$this->scale *= 10;
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$this->upscaled = true;
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}
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return imagecreatetruecolor($this->length, $this->length);
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}
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/**
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* Sets the background color
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*/
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protected function setBgColor():void{
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if(isset($this->background)){
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return;
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}
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if($this::moduleValueIsValid($this->options->bgColor)){
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$this->background = $this->prepareModuleValue($this->options->bgColor);
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return;
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}
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$this->background = $this->prepareModuleValue([255, 255, 255]);
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}
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/**
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* Sets the transparency color
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*/
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protected function setTransparencyColor():void{
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// @todo: the jpg skip can be removed in v6
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if($this->options->outputType === QROutputInterface::GDIMAGE_JPG || !$this->options->imageTransparent){
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return;
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}
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$transparencyColor = $this->background;
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if($this::moduleValueIsValid($this->options->transparencyColor)){
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$transparencyColor = $this->prepareModuleValue($this->options->transparencyColor);
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}
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imagecolortransparent($this->image, $transparencyColor);
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}
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/**
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* Draws the QR image
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*/
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protected function drawImage():void{
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foreach($this->matrix->getMatrix() as $y => $row){
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foreach($row as $x => $M_TYPE){
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$this->module($x, $y, $M_TYPE);
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}
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}
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}
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/**
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* Creates a single QR pixel with the given settings
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*/
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protected function module(int $x, int $y, int $M_TYPE):void{
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if(!$this->drawLightModules && !$this->matrix->isDark($M_TYPE)){
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return;
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}
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$color = $this->getModuleValue($M_TYPE);
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if($this->drawCircularModules && !$this->matrix->checkTypeIn($x, $y, $this->keepAsSquare)){
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imagefilledellipse(
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$this->image,
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(($x * $this->scale) + intdiv($this->scale, 2)),
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(($y * $this->scale) + intdiv($this->scale, 2)),
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(int)($this->circleDiameter * $this->scale),
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(int)($this->circleDiameter * $this->scale),
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$color
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);
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return;
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}
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imagefilledrectangle(
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$this->image,
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($x * $this->scale),
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($y * $this->scale),
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(($x + 1) * $this->scale),
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(($y + 1) * $this->scale),
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$color
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);
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}
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/**
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* Renders the image with the gdimage function for the desired output
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*
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* @see \imagebmp()
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* @see \imagegif()
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* @see \imagejpeg()
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* @see \imagepng()
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* @see \imagewebp()
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*
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* @todo: v6.0: make abstract and call from child classes
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* @see https://github.com/chillerlan/php-qrcode/issues/223
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* @codeCoverageIgnore
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*/
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protected function renderImage():void{
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switch($this->options->outputType){
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case QROutputInterface::GDIMAGE_BMP:
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imagebmp($this->image, null, ($this->options->quality > 0));
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break;
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case QROutputInterface::GDIMAGE_GIF:
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imagegif($this->image);
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break;
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case QROutputInterface::GDIMAGE_JPG:
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imagejpeg($this->image, null, max(-1, min(100, $this->options->quality)));
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break;
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case QROutputInterface::GDIMAGE_WEBP:
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imagewebp($this->image, null, max(-1, min(100, $this->options->quality)));
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break;
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// silently default to png output
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case QROutputInterface::GDIMAGE_PNG:
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default:
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imagepng($this->image, null, max(-1, min(9, $this->options->quality)));
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}
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}
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/**
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* Creates the final image by calling the desired GD output function
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*
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* @throws \chillerlan\QRCode\Output\QRCodeOutputException
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*/
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protected function dumpImage():string{
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$exception = null;
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$imageData = null;
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ob_start();
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try{
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$this->renderImage();
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$imageData = ob_get_contents();
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imagedestroy($this->image);
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}
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// not going to cover edge cases
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// @codeCoverageIgnoreStart
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catch(Throwable $e){
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$exception = $e;
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}
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// @codeCoverageIgnoreEnd
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ob_end_clean();
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// throw here in case an exception happened within the output buffer
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if($exception instanceof Throwable){
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throw new QRCodeOutputException($exception->getMessage());
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}
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return $imageData;
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}
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}
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