From c6c43ad89502cfe713da93fdfdfbd338d62329f4 Mon Sep 17 00:00:00 2001
From: jbb01 <32650546+jbb01@users.noreply.github.com>
Date: Tue, 6 Aug 2024 17:39:09 +0200
Subject: [PATCH] fix length of IDAT chunk

---
 docs/diagramm.png                             | Bin 2444917 -> 2444917 bytes
 .../raytracing/render/ImageFormat.java        |   4 +++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/diagramm.png b/docs/diagramm.png
index 76290c11a37625bf8761ccc43239fad561c6a7ee..29e0a575b9eb07c8c4d7b97f6baaef2af28b7f73 100644
GIT binary patch
delta 127
zcmWN=xe<a;06@X{UU(p$;DHAsuM2BnY>D9ICT6r@Y2>&w+qK`&{eP<PYLFlU8Olh;
xGLcB8GLyM1B$lNlvXZrIWGg$_ODdTh<R~XOOD-3=%1!Q4$U{nbO7(+x-2>uTA_V{d

delta 127
zcmWN=xe<a;06@X{UU(p$;DHAsuMaC=Y>D9ICT6r@Y2>&w+qK`&{eP<PYLFlU8Olh;
xGLcB8GLyM1B$lNlvXZrIWGg$_ODdTh<R~XOOD-3=%1!Q4$U{nbO7(+x-2>z)A_)Kh

diff --git a/src/main/java/eu/jonahbauer/raytracing/render/ImageFormat.java b/src/main/java/eu/jonahbauer/raytracing/render/ImageFormat.java
index 79e6c1a..e3171c9 100644
--- a/src/main/java/eu/jonahbauer/raytracing/render/ImageFormat.java
+++ b/src/main/java/eu/jonahbauer/raytracing/render/ImageFormat.java
@@ -1,6 +1,7 @@
 package eu.jonahbauer.raytracing.render;
 
 import eu.jonahbauer.raytracing.render.canvas.Canvas;
+import eu.jonahbauer.raytracing.render.canvas.Image;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.*;
@@ -10,6 +11,7 @@ import java.nio.file.Path;
 import java.util.zip.CRC32;
 import java.util.zip.CheckedOutputStream;
 import java.util.zip.DeflaterOutputStream;
+import java.util.zip.InflaterInputStream;
 
 public enum ImageFormat {
     PPM {
@@ -93,7 +95,7 @@ public enum ImageFormat {
                 }
 
                 var bytes = baos.toByteArray();
-                data.writeInt(bytes.length);
+                data.writeInt(bytes.length - 4); // don't include type in length
                 data.write(bytes);
                 data.writeInt((int) crc.getChecksum().getValue());
             }