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102 lines
4.0 KiB
Markdown
102 lines
4.0 KiB
Markdown
# QRGdImage
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[Class `QRGdImage`](https://github.com/chillerlan/php-qrcode/blob/main/src/Output/QRGdImage.php):
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[GdImage](https://www.php.net/manual/book.image) raster graphic output (GIF, JPG, PNG, ...)
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## Example
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See: [GdImage example](https://github.com/chillerlan/php-qrcode/blob/main/examples/image.php)
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Set the options:
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```php
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$options = new QROptions;
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// $outputInterface can be one of the classes listed in `QROutputInterface::MODES`
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$options->outputInterface = QRGdImageWEBP::class;
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$options->quality = 90;
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// the size of one qr module in pixels
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$options->scale = 20;
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$options->bgColor = [200, 150, 200];
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$options->imageTransparent = true;
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// the color that will be set transparent
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// @see https://www.php.net/manual/en/function.imagecolortransparent
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$options->transparencyColor = [200, 150, 200];
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$options->drawCircularModules = true;
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$options->drawLightModules = true;
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$options->circleRadius = 0.4;
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$options->keepAsSquare = [
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QRMatrix::M_FINDER_DARK,
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QRMatrix::M_FINDER_DOT,
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QRMatrix::M_ALIGNMENT_DARK,
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];
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$options->moduleValues = [
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QRMatrix::M_FINDER_DARK => [0, 63, 255], // dark (true)
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QRMatrix::M_FINDER_DOT => [0, 63, 255], // finder dot, dark (true)
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QRMatrix::M_FINDER => [233, 233, 233], // light (false)
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QRMatrix::M_ALIGNMENT_DARK => [255, 0, 255],
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QRMatrix::M_ALIGNMENT => [233, 233, 233],
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QRMatrix::M_DATA_DARK => [0, 0, 0],
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QRMatrix::M_DATA => [233, 233, 233],
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];
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```
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Render the output:
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```php
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$data = 'https://www.youtube.com/watch?v=dQw4w9WgXcQ';
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$out = new QRCode($options)->render($data); // -> data:image/webp;base64,...
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printf('<img alt="%s" src="%s" />', $alt, $out);
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```
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Return the `GdImage` instance (will ignore other output options):
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```php
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$options->returnResource = true;
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/** @var \GdImage $gdImage */
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$gdImage = new QRCode($options)->render($data);
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// do stuff with the GdImage instance...
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$size = imagesx($gdImage);
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// ...
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// ...dump output
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header('Content-type: image/jpeg');
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imagejpeg($gdImage);
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imagedestroy($gdImage);
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```
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## Additional methods
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| method | return | description |
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|---------------------------------------------------|----------|--------------------------------------------------------------------------------------------------|
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| (protected) `drawImage()` | `void` | Draws the QR image |
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| (protected) `dumpImage()` | `string` | Creates the final image by calling the desired GD output function |
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| (protected) `module(int $x, int $y, int $M_TYPE)` | `void` | Renders a single module |
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| (protected) `setBgColor()` | `void` | Sets the background color |
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| (protected) `setTransparencyColor()` | `void` | Sets the transparency color |
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| (abstract protected) `renderImage()` | `void` | Renders the image with the gdimage function for the desired output, implemented by child classes |
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## Options that affect this class
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| property | type |
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|------------------------|----------------|
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| `$bgColor` | `mixed` |
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| `$circleRadius` | `float` |
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| `$drawCircularModules` | `bool` |
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| `$drawLightModules` | `bool` |
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| `$imageTransparent` | `bool` |
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| `$quality` | `int` |
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| `$keepAsSquare` | `array` |
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| `$outputBase64` | `bool` |
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| `$returnResource` | `bool` |
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| `$scale` | `int` |
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| `$transparencyColor` | `mixed` |
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