From 87c669d95973f61aa451733183d683d41fe4cbb5 Mon Sep 17 00:00:00 2001
From: James O'Leary <jamesoleary@google.com>
Date: Wed, 2 Jun 2021 10:35:05 -0400
Subject: [PATCH] Don't interpolate image input to quantizer

With `false`, nearest neighbor is used during scaling, with `true`,
bilinear interpolation is used. Bilinear interpolation can introduce
colors that weren't in the original image (ex. overemphasizing red/brown
highlights in a mostly B+W image of the Mandolorian). Better to avoid
that.

Bug: 189931209
Test: Test tons and tons of wallpapers over a couple days.
Change-Id: I425f95793ca593dbbc5008ef59f4baedaea318a6
---
 core/java/android/app/WallpaperColors.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/java/android/app/WallpaperColors.java b/core/java/android/app/WallpaperColors.java
index edd60473c5227..b9e5c090a4870 100644
--- a/core/java/android/app/WallpaperColors.java
+++ b/core/java/android/app/WallpaperColors.java
@@ -176,7 +176,7 @@ public final class WallpaperColors implements Parcelable {
             shouldRecycle = true;
             Size optimalSize = calculateOptimalSize(bitmap.getWidth(), bitmap.getHeight());
             bitmap = Bitmap.createScaledBitmap(bitmap, optimalSize.getWidth(),
-                    optimalSize.getHeight(), true /* filter */);
+                    optimalSize.getHeight(), false /* filter */);
         }
 
         final Palette palette;