Out of range fix

ynse01 · ynse01 · commit 7e4825332b68 · 2023-06-21T19:14:21.000+02:00
diff --git a/src/ImageSharp/Formats/Pbm/BinaryDecoder.cs b/src/ImageSharp/Formats/Pbm/BinaryDecoder.cs
@@ -161,7 +161,8 @@ private static void ProcessBlackAndWhite<TPixel>(Configuration configuration, Bu
             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;
diff --git a/src/ImageSharp/Formats/Pbm/BinaryEncoder.cs b/src/ImageSharp/Formats/Pbm/BinaryEncoder.cs
@@ -192,7 +192,8 @@ private static void WriteBlackAndWhite<TPixel>(Configuration configuration, Stre
             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)
                     {

Original file line number	Diff line number	Diff line change
`@@ -161,7 +161,8 @@ private static void ProcessBlackAndWhite<TPixel>(Configuration configuration, Bu`
`161`	`161`	`for (int x = 0; x < width;)`
`162`	`162`	`{`
`163`	`163`	`int raw = stream.ReadByte();`
`164`		`- for (int bit = 0; bit < 8; bit++)`
	`164`	`+ int stopBit = Math.Min(8, width - x);`
	`165`	`+ for (int bit = 0; bit < stopBit; bit++)`
`165`	`166`	`{`
`166`	`167`	`bool bitValue = (raw & (0x80 >> bit)) != 0;`
`167`	`168`	`rowSpan[x] = bitValue ? black : white;`
Original file line number	Diff line number	Diff line change
`@@ -192,7 +192,8 @@ private static void WriteBlackAndWhite<TPixel>(Configuration configuration, Stre`
`192`	`192`	`for (int x = 0; x < width;)`
`193`	`193`	`{`
`194`	`194`	`int value = previousValue;`
`195`		`- for (int i = 0; i < 8; i++)`
	`195`	`+ int stopBit = Math.Min(8, width - x);`
	`196`	`+ for (int i = 0; i < stopBit; i++)`
`196`	`197`	`{`
`197`	`198`	`if (rowSpan[x].PackedValue < 128)`
`198`	`199`	`{`