Execute RemoveStridePadding in place when possible

UglyToad · Jan 5, 2025 · f86cc58 · f86cc58
1 parent 53cf4f2
commit f86cc58
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/UglyToad.PdfPig/Images/ColorSpaceDetailsByteConverter.cs b/src/UglyToad.PdfPig/Images/ColorSpaceDetailsByteConverter.cs
@@ -87,7 +87,10 @@ private static Span<byte> UnpackComponents(Span<byte> input, int bitsPerComponen
 
         private static Span<byte> RemoveStridePadding(Span<byte> input, int strideWidth, int imageWidth, int imageHeight, int multiplier)
         {
-            Span<byte> result = new byte[imageWidth * imageHeight * multiplier];
+            int size = imageWidth * imageHeight * multiplier;
+            Span<byte> result = size < input.Length ? input.Slice(0, size) : new byte[size];
+            // See PDFBOX-492-4.jar-8.pdf, page 2 for size > input.Length
+
             for (int y = 0; y < imageHeight; y++)
             {
                 int sourceIndex = y * strideWidth;