From 62bc32a4f70f74fba351287a60c8d6483124a67a Mon Sep 17 00:00:00 2001
From: BobLd <38405645+BobLd@users.noreply.github.com>
Date: Sat, 4 Nov 2023 13:54:05 +0000
Subject: [PATCH] Correctly parse FunctionBasedShading matrix and fix #702

---
 .../Integration/Documents/PDFBOX-1869-4-1.pdf    | Bin 0 -> 4227 bytes
 .../Integration/ShadingTests.cs                  |  10 ++++++++++
 src/UglyToad.PdfPig/Util/ShadingParser.cs        |   2 +-
 3 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 src/UglyToad.PdfPig.Tests/Integration/Documents/PDFBOX-1869-4-1.pdf

diff --git a/src/UglyToad.PdfPig.Tests/Integration/Documents/PDFBOX-1869-4-1.pdf b/src/UglyToad.PdfPig.Tests/Integration/Documents/PDFBOX-1869-4-1.pdf
new file mode 100644
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diff --git a/src/UglyToad.PdfPig.Tests/Integration/ShadingTests.cs b/src/UglyToad.PdfPig.Tests/Integration/ShadingTests.cs
index d7007472a..4c77b3fd1 100644
--- a/src/UglyToad.PdfPig.Tests/Integration/ShadingTests.cs
+++ b/src/UglyToad.PdfPig.Tests/Integration/ShadingTests.cs
@@ -4,6 +4,16 @@
 
     public class ShadingTests
     {
+        [Fact]
+        public void Issue702()
+        {
+            // Placeholder test for issue 702, the document contains a FunctionBasedShading
+            using (var document = PdfDocument.Open(IntegrationHelpers.GetDocumentPath("PDFBOX-1869-4-1.pdf")))
+            {
+                var page1 = document.GetPage(1);
+            }
+        }
+
         [Fact]
         public void AxialRadial1()
         {
diff --git a/src/UglyToad.PdfPig/Util/ShadingParser.cs b/src/UglyToad.PdfPig/Util/ShadingParser.cs
index 2126059e0..6b9744154 100644
--- a/src/UglyToad.PdfPig/Util/ShadingParser.cs
+++ b/src/UglyToad.PdfPig/Util/ShadingParser.cs
@@ -144,7 +144,7 @@ private static FunctionBasedShading CreateFunctionBasedShading(DictionaryToken s
             }
 
             TransformationMatrix matrix;
-            if (shadingDictionary.TryGet<ArrayToken>(NameToken.Coords, scanner, out var matrixToken))
+            if (shadingDictionary.TryGet<ArrayToken>(NameToken.Matrix, scanner, out var matrixToken))
             {
                 matrix = TransformationMatrix.FromArray(matrixToken.Data.OfType<NumericToken>().Select(n => n.Data).ToArray());
             }