Fix incorrect acTL frame count

SpaceCheetah · SpaceCheetah · commit 61b5b0c3a943 · 2024-03-29T21:35:53.000-10:00
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -196,7 +196,7 @@ public void Encode<TPixel>(Image<TPixel> image, Stream stream, CancellationToken
 
         if (image.Frames.Count > 1)
         {
-            this.WriteAnimationControlChunk(stream, (uint)image.Frames.Count, pngMetadata.RepeatCount);
+            this.WriteAnimationControlChunk(stream, (uint)(image.Frames.Count - (pngMetadata.DefaultImageAnimated ? 0 : 1)), pngMetadata.RepeatCount);
         }
 
         // If the first frame isn't animated, write it as usual and skip it when writing animated frames

Original file line number	Diff line number	Diff line change
`@@ -196,7 +196,7 @@ public void Encode<TPixel>(Image<TPixel> image, Stream stream, CancellationToken`
`196`	`196`
`197`	`197`	`if (image.Frames.Count > 1)`
`198`	`198`	`{`
`199`		`- this.WriteAnimationControlChunk(stream, (uint)image.Frames.Count, pngMetadata.RepeatCount);`
	`199`	`+ this.WriteAnimationControlChunk(stream, (uint)(image.Frames.Count - (pngMetadata.DefaultImageAnimated ? 0 : 1)), pngMetadata.RepeatCount);`
`200`	`200`	`}`
`201`	`201`
`202`	`202`	`// If the first frame isn't animated, write it as usual and skip it when writing animated frames`