Improve code readability (#984)

kindlecomicconverter/comic2ebook.py

@@ -642,8 +642,12 @@ def imgFileProcessing(work):
             img.autocontrastImage()
             img.resizeImage()
             img.optimizeForDisplay(opt.reducerainbow)
-            if not opt.forcecolor or (opt.forcecolor and not workImg.color):
-                img.convertToGrayscaleOrQuantize()
+            if opt.forcecolor and workImg.color:
+                pass
+            elif opt.forcepng:
+                img.quantizeImage()
+            else:
+                img.convertToGrayscale()
             output.append(img.saveToDir())
         return output
     except Exception:

kindlecomicconverter/image.py

@@ -351,10 +351,7 @@ class ComicPage:
         else:
             self.image = ImageOps.autocontrast(Image.eval(self.image, lambda a: int(255 * (a / 255.) ** gamma)))
 
-    def convertToGrayscaleOrQuantize(self):
-        if self.opt.forcepng:
-            self.quantizeImage()
-        else:
+    def convertToGrayscale(self):
         self.image = self.image.convert('L')
 
     def quantizeImage(self):