From 87987c9ebfc9253afa2e93e59ee2fce0d7db37cb Mon Sep 17 00:00:00 2001
From: Alex Xu <alexkurosakimh3@gmail.com>
Date: Tue, 17 Mar 2026 15:09:02 -0700
Subject: [PATCH] fix humble bundle pdf png autocontrast (#1273)

---
 kindlecomicconverter/comic2ebook.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kindlecomicconverter/comic2ebook.py b/kindlecomicconverter/comic2ebook.py
index 9b017d4..3f6fd44 100755
--- a/kindlecomicconverter/comic2ebook.py
+++ b/kindlecomicconverter/comic2ebook.py
@@ -698,6 +698,9 @@ def imgFileProcessing(work):
 
             img.gammaCorrectImage()
 
+            if not img.colorOutput:
+                img.convertToGrayscale()
+
             img.autocontrastImage()
             img.resizeImage()
             img.optimizeForDisplay(opt.eraserainbow, img.colorOutput)
@@ -705,7 +708,6 @@ def imgFileProcessing(work):
             if img.colorOutput:
                 pass
             elif opt.forcepng:
-                img.convertToGrayscale()
                 if not opt.noquantize:
                     img.quantizeImage()
                 if opt.format == 'PDF':
@@ -714,8 +716,6 @@ def imgFileProcessing(work):
                     img.convertToGrayscale()
                 elif opt.pnglegacy:
                     img.convertToGrayscale()
-            else:
-                img.convertToGrayscale()
             output.append(img.saveToDir())
         return output
     except Exception: