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Viewing File: /home/optimaldigitaltr/public_html/src/vendor/bacon/bacon-qr-code/src/Renderer/GDLibRenderer.php
<?php
declare(strict_types=1);
namespace BaconQrCode\Renderer;
use BaconQrCode\Encoder\ByteMatrix;
use BaconQrCode\Encoder\MatrixUtil;
use BaconQrCode\Encoder\QrCode;
use BaconQrCode\Exception\InvalidArgumentException;
use BaconQrCode\Exception\RuntimeException;
use BaconQrCode\Renderer\Color\Alpha;
use BaconQrCode\Renderer\Color\ColorInterface;
use BaconQrCode\Renderer\RendererStyle\EyeFill;
use BaconQrCode\Renderer\RendererStyle\Fill;
use GdImage;
final class GDLibRenderer implements RendererInterface
{
private ?GdImage $image;
/**
* @var array<string, int>
*/
private array $colors;
public function __construct(
private int $size,
private int $margin = 4,
private string $imageFormat = 'png',
private int $compressionQuality = 9,
private ?Fill $fill = null
) {
if (! extension_loaded('gd') || ! function_exists('gd_info')) {
throw new RuntimeException('You need to install the GD extension to use this back end');
}
if ($this->fill === null) {
$this->fill = Fill::default();
}
if ($this->fill->hasGradientFill()) {
throw new InvalidArgumentException('GDLibRenderer does not support gradients');
}
}
/**
* @throws InvalidArgumentException if matrix width doesn't match height
*/
public function render(QrCode $qrCode): string
{
$matrix = $qrCode->getMatrix();
$matrixSize = $matrix->getWidth();
if ($matrixSize !== $matrix->getHeight()) {
throw new InvalidArgumentException('Matrix must have the same width and height');
}
MatrixUtil::removePositionDetectionPatterns($matrix);
$this->newImage();
$this->draw($matrix);
return $this->renderImage();
}
private function newImage(): void
{
$img = imagecreatetruecolor($this->size, $this->size);
if ($img === false) {
throw new RuntimeException('Failed to create image of that size');
}
$this->image = $img;
imagealphablending($this->image, false);
imagesavealpha($this->image, true);
$bg = $this->getColor($this->fill->getBackgroundColor());
imagefilledrectangle($this->image, 0, 0, $this->size, $this->size, $bg);
imagealphablending($this->image, true);
}
private function draw(ByteMatrix $matrix): void
{
$matrixSize = $matrix->getWidth();
$pointsOnSide = $matrix->getWidth() + $this->margin * 2;
$pointInPx = $this->size / $pointsOnSide;
$this->drawEye(0, 0, $pointInPx, $this->fill->getTopLeftEyeFill());
$this->drawEye($matrixSize - 7, 0, $pointInPx, $this->fill->getTopRightEyeFill());
$this->drawEye(0, $matrixSize - 7, $pointInPx, $this->fill->getBottomLeftEyeFill());
$rows = $matrix->getArray()->toArray();
$color = $this->getColor($this->fill->getForegroundColor());
for ($y = 0; $y < $matrixSize; $y += 1) {
for ($x = 0; $x < $matrixSize; $x += 1) {
if (! $rows[$y][$x]) {
continue;
}
$points = $this->normalizePoints([
($this->margin + $x) * $pointInPx, ($this->margin + $y) * $pointInPx,
($this->margin + $x + 1) * $pointInPx, ($this->margin + $y) * $pointInPx,
($this->margin + $x + 1) * $pointInPx, ($this->margin + $y + 1) * $pointInPx,
($this->margin + $x) * $pointInPx, ($this->margin + $y + 1) * $pointInPx,
]);
imagefilledpolygon($this->image, $points, $color);
}
}
}
private function drawEye(int $xOffset, int $yOffset, float $pointInPx, EyeFill $eyeFill): void
{
$internalColor = $this->getColor($eyeFill->inheritsInternalColor()
? $this->fill->getForegroundColor()
: $eyeFill->getInternalColor());
$externalColor = $this->getColor($eyeFill->inheritsExternalColor()
? $this->fill->getForegroundColor()
: $eyeFill->getExternalColor());
for ($y = 0; $y < 7; $y += 1) {
for ($x = 0; $x < 7; $x += 1) {
if ((($y === 1 || $y === 5) && $x > 0 && $x < 6) || (($x === 1 || $x === 5) && $y > 0 && $y < 6)) {
continue;
}
$points = $this->normalizePoints([
($this->margin + $x + $xOffset) * $pointInPx, ($this->margin + $y + $yOffset) * $pointInPx,
($this->margin + $x + $xOffset + 1) * $pointInPx, ($this->margin + $y + $yOffset) * $pointInPx,
($this->margin + $x + $xOffset + 1) * $pointInPx, ($this->margin + $y + $yOffset + 1) * $pointInPx,
($this->margin + $x + $xOffset) * $pointInPx, ($this->margin + $y + $yOffset + 1) * $pointInPx,
]);
if ($y > 1 && $y < 5 && $x > 1 && $x < 5) {
imagefilledpolygon($this->image, $points, $internalColor);
} else {
imagefilledpolygon($this->image, $points, $externalColor);
}
}
}
}
/**
* Normalize points will trim right and bottom line by 1 pixel.
* Otherwise pixels of neighbors are overlapping which leads to issue with transparency and small QR codes.
*/
private function normalizePoints(array $points): array
{
$maxX = $maxY = 0;
for ($i = 0; $i < count($points); $i += 2) {
// Do manual round as GD just removes decimal part
$points[$i] = $newX = round($points[$i]);
$points[$i + 1] = $newY = round($points[$i + 1]);
$maxX = max($maxX, $newX);
$maxY = max($maxY, $newY);
}
// Do trimming only if there are 4 points (8 coordinates), assumes this is square.
for ($i = 0; $i < count($points); $i += 2) {
$points[$i] = min($points[$i], $maxX - 1);
$points[$i + 1] = min($points[$i + 1], $maxY - 1);
}
return $points;
}
private function renderImage(): string
{
ob_start();
$quality = $this->compressionQuality;
switch ($this->imageFormat) {
case 'png':
if ($quality > 9 || $quality < 0) {
$quality = 9;
}
imagepng($this->image, null, $quality);
break;
case 'gif':
imagegif($this->image, null);
break;
case 'jpeg':
case 'jpg':
if ($quality > 100 || $quality < 0) {
$quality = 85;
}
imagejpeg($this->image, null, $quality);
break;
default:
ob_end_clean();
throw new InvalidArgumentException(
'Supported image formats are jpeg, png and gif, got: ' . $this->imageFormat
);
}
imagedestroy($this->image);
$this->colors = [];
$this->image = null;
return ob_get_clean();
}
private function getColor(ColorInterface $color): int
{
$alpha = 100;
if ($color instanceof Alpha) {
$alpha = $color->getAlpha();
$color = $color->getBaseColor();
}
$rgb = $color->toRgb();
$colorKey = sprintf('%02X%02X%02X%02X', $rgb->getRed(), $rgb->getGreen(), $rgb->getBlue(), $alpha);
if (! isset($this->colors[$colorKey])) {
$colorId = imagecolorallocatealpha(
$this->image,
$rgb->getRed(),
$rgb->getGreen(),
$rgb->getBlue(),
(int)((100 - $alpha) / 100 * 127) // Alpha for GD is in range 0 (opaque) - 127 (transparent)
);
if ($colorId === false) {
throw new RuntimeException('Failed to create color: #' . $colorKey);
}
$this->colors[$colorKey] = $colorId;
}
return $this->colors[$colorKey];
}
}
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