Fix incorrect acTL frame count

SpaceCheetah · SpaceCheetah · commit ceb7dc0e7e26 · 2024-04-02T11:16:18.000-07:00
diff --git a/src/ImageSharp/Formats/Png/PngEncoderCore.cs b/src/ImageSharp/Formats/Png/PngEncoderCore.cs
@@ -190,7 +190,7 @@ 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
`@@ -190,7 +190,7 @@ public void Encode<TPixel>(Image<TPixel> image, Stream stream, CancellationToken`
`190`	`190`
`191`	`191`	`if (image.Frames.Count > 1)`
`192`	`192`	`{`
`193`		`- this.WriteAnimationControlChunk(stream, (uint)image.Frames.Count, pngMetadata.RepeatCount);`
	`193`	`+ this.WriteAnimationControlChunk(stream, (uint)(image.Frames.Count - (pngMetadata.DefaultImageAnimated ? 0 : 1)), pngMetadata.RepeatCount);`
`194`	`194`	`}`
`195`	`195`
`196`	`196`	`// If the first frame isn't animated, write it as usual and skip it when writing animated frames`