From e5ea8869cf699629227e91dee6bc122d897b0651 Mon Sep 17 00:00:00 2001
From: frankenbubble <62951241+frankenbubble@users.noreply.github.com>
Date: Thu, 2 Sep 2021 17:08:14 +0100
Subject: [PATCH] make webp reduction effort a configurable

allows you to set an environment variable WEBP_REDUCTION_EFFORT to configure the amount of effort that is put into webp reducing size. trade off is more cpu effort ($$$) vs file size
---
 source/image-handler/image-handler.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/source/image-handler/image-handler.js b/source/image-handler/image-handler.js
index 62e1f6b17..b108fe4c3 100644
--- a/source/image-handler/image-handler.js
+++ b/source/image-handler/image-handler.js
@@ -33,6 +33,13 @@ class ImageHandler {
                 }
             }
 
+            if (request.outputFormat === 'webp') {
+                const reductionEffortVal = process.env.WEBP_REDUCTION_EFFORT;
+                if (typeof reductionEffortVal !== "undefined") {
+                    image = sharp(originalImage, { failOnError: false }).webp({reductionEffort: parseInt(reductionEffortVal, 10)});
+                }
+            }
+            
             const modifiedImage = await this.applyEdits(image, edits);
             if (request.outputFormat !== undefined) {
                 modifiedImage.toFormat(request.outputFormat);