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docs/Built-In-Output-QRFpdf.md

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+# QRFpdf
+
+[Class `QRFpdf`](https://github.com/chillerlan/php-qrcode/blob/main/src/Output/QRFpdf.php): [Portable Document Format](https://en.wikipedia.org/wiki/PDF) (PDF) output via [FPDF](https://github.com/setasign/fpdf)
+
+
+## Options that affect this module
+
+| property                       | type           |
+|--------------------------------|----------------|
+| `$returnResource`              | `bool`         |
+| `$imageBase64`                 | `bool`         |
+| `$bgColor`                     | `mixed`        |
+| `$drawLightModules`            | `bool`         |
+| `$fpdfMeasureUnit`             | `string`       |
+
+
+### Options that have no effect
+
+| property               | reason          |
+|------------------------|-----------------|
+| `$drawCircularModules` | N/A             |
+| `$circleRadius`        | N/A             |
+| `$keepAsSquare`        | N/A             |
+| `$connectPaths`        | N/A             |
+| `$excludeFromConnect`  | N/A             |
+| `$scale`               | not implemented |
+| `$imageTransparent`    | N/A             |
+
+