From 454f873b1a388c821e57edf8bfd071057575b56d Mon Sep 17 00:00:00 2001
From: Gerard Gunnewijk <gerard.gunnewijk@live.nl>
Date: Thu, 13 Feb 2025 11:38:01 +0100
Subject: [PATCH] Replace deflate with zlibstream

---
 src/Synercoding.FileFormats.Pdf/PackageDetails.props | 2 +-
 src/Synercoding.FileFormats.Pdf/PdfWriter.cs         | 7 ++-----
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/Synercoding.FileFormats.Pdf/PackageDetails.props b/src/Synercoding.FileFormats.Pdf/PackageDetails.props
index ee3b493..94e8325 100644
--- a/src/Synercoding.FileFormats.Pdf/PackageDetails.props
+++ b/src/Synercoding.FileFormats.Pdf/PackageDetails.props
@@ -10,7 +10,7 @@
     <Product>Synercoding.FileFormats.Pdf</Product>
     <Title>Synercoding.FileFormats.Pdf</Title>
     <Description>Contains classes which makes it easy to quickly create a pdf file.</Description>
-    <PackageReleaseNotes>Added transparent and separation images support. Content streams will be flatedecode encoded. And overprint mode support is added.</PackageReleaseNotes>
+    <PackageReleaseNotes>Fixed broken zlib stream by removing explicit header and replacing deflate with zlib.</PackageReleaseNotes>
   </PropertyGroup>
 
 </Project>
diff --git a/src/Synercoding.FileFormats.Pdf/PdfWriter.cs b/src/Synercoding.FileFormats.Pdf/PdfWriter.cs
index 4c72d97..40a1163 100644
--- a/src/Synercoding.FileFormats.Pdf/PdfWriter.cs
+++ b/src/Synercoding.FileFormats.Pdf/PdfWriter.cs
@@ -275,13 +275,10 @@ internal static Stream FlateEncode(Stream inputStream)
     {
         var outputStream = new MemoryStream();
 
-        outputStream.WriteByte(0x78);
-        outputStream.WriteByte(0xDA);
-
         inputStream.Position = 0;
-        using (var flateStream = new DeflateStream(outputStream, CompressionLevel.SmallestSize, true))
+        using (var zlibStream = new ZLibStream(outputStream, CompressionLevel.SmallestSize, true))
         {
-            inputStream.CopyTo(flateStream);
+            inputStream.CopyTo(zlibStream);
         }
 
         outputStream.Position = 0;