From bc09f0d42fba594b5a88a530d86cba6a11ebfd84 Mon Sep 17 00:00:00 2001
From: Oliver Vogel <oliver@olivervogel.com>
Date: Tue, 19 Dec 2023 16:52:15 +0100
Subject: [PATCH] Set lossless quality for GD WebpEncoder

A value of 101 is actually specified for lossless coding with GD.
However, since Imagick expects 100 for lossless in WebP format,
I adjust this for both drivers.
---
 src/Drivers/Gd/Encoders/WebpEncoder.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Drivers/Gd/Encoders/WebpEncoder.php b/src/Drivers/Gd/Encoders/WebpEncoder.php
index 23939a3c..1a590dbe 100644
--- a/src/Drivers/Gd/Encoders/WebpEncoder.php
+++ b/src/Drivers/Gd/Encoders/WebpEncoder.php
@@ -13,8 +13,9 @@ class WebpEncoder extends DriverSpecializedEncoder
 {
     public function encode(ImageInterface $image): EncodedImage
     {
-        $data = $this->getBuffered(function () use ($image) {
-            imagewebp($image->core()->native(), null, $this->quality);
+        $quality = $this->quality === 100 ? IMG_WEBP_LOSSLESS : $this->quality;
+        $data = $this->getBuffered(function () use ($image, $quality) {
+            imagewebp($image->core()->native(), null, $quality);
         });
 
         return new EncodedImage($data, 'image/webp');