Out of range fix

3 years ago · 7e4825332b
2 changed files with 4 additions and 2 deletions
--- a/src/ImageSharp/Formats/Pbm/BinaryDecoder.cs
+++ b/src/ImageSharp/Formats/Pbm/BinaryDecoder.cs
@ -161,7 +161,8 @@ internal class BinaryDecoder
            for (int x = 0; x < width;)
            {
                int raw = stream.ReadByte();
-                for (int bit = 0; bit < 8; bit++)
+                int stopBit = Math.Min(8, width - x);
+                for (int bit = 0; bit < stopBit; bit++)
                {
                    bool bitValue = (raw & (0x80 >> bit)) != 0;
                    rowSpan[x] = bitValue ? black : white;
--- a/src/ImageSharp/Formats/Pbm/BinaryEncoder.cs
+++ b/src/ImageSharp/Formats/Pbm/BinaryEncoder.cs
@ -192,7 +192,8 @@ internal class BinaryEncoder
            for (int x = 0; x < width;)
            {
                int value = previousValue;
-                for (int i = 0; i < 8; i++)
+                int stopBit = Math.Min(8, width - x);
+                for (int i = 0; i < stopBit; i++)
                {
                    if (rowSpan[x].PackedValue < 128)
                    {