From 7382151db8e72d31cfb6c0626d148353b8db538f Mon Sep 17 00:00:00 2001
From: Simon Kammermeier <simon.kammermeier@tum.de>
Date: Mon, 29 Aug 2022 16:30:22 +0200
Subject: [PATCH] Convert transforms list and colorCache to local variables

This is needed because on recursion new (empty) ones are necessary.
---
 .../imageio/plugins/webp/lossless/VP8LDecoder.java     | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/imageio/imageio-webp/src/main/java/com/twelvemonkeys/imageio/plugins/webp/lossless/VP8LDecoder.java b/imageio/imageio-webp/src/main/java/com/twelvemonkeys/imageio/plugins/webp/lossless/VP8LDecoder.java
index 860f2b9e..ade640b3 100644
--- a/imageio/imageio-webp/src/main/java/com/twelvemonkeys/imageio/plugins/webp/lossless/VP8LDecoder.java
+++ b/imageio/imageio-webp/src/main/java/com/twelvemonkeys/imageio/plugins/webp/lossless/VP8LDecoder.java
@@ -52,9 +52,6 @@ public final class VP8LDecoder {
     private final ImageInputStream imageInput;
     private final LSBBitReader lsbBitReader;
 
-    private final List<Transform> transforms = new ArrayList<>();
-    private ColorCache colorCache;
-
     public VP8LDecoder(final ImageInputStream imageInput, final boolean debug) {
         this.imageInput = imageInput;
         lsbBitReader = new LSBBitReader(imageInput);
@@ -67,8 +64,9 @@ public final class VP8LDecoder {
         int ySize = raster.getHeight();
 
         // Read transforms
+        ArrayList<Transform> transforms = new ArrayList<>();
         while (topLevel && lsbBitReader.readBit() == 1) {
-            xSize = readTransform(xSize, ySize);
+            xSize = readTransform(xSize, ySize, transforms);
         }
 
         // Read color cache size
@@ -83,6 +81,8 @@ public final class VP8LDecoder {
         // Read Huffman codes
         readHuffmanCodes(colorCacheBits, topLevel);
 
+        ColorCache colorCache = null;
+
         if (colorCacheBits > 0) {
             colorCache = new ColorCache(colorCacheBits);
         }
@@ -91,7 +91,7 @@ public final class VP8LDecoder {
 //        decodeImageData(raster, )
     }
 
-    private int readTransform(int xSize, int ySize) throws IOException {
+    private int readTransform(int xSize, int ySize, List<Transform> transforms) throws IOException {
         int transformType = (int) lsbBitReader.readBits(2);
 
         // TODO: Each transform type can only be present once in the stream.