Skiasharp: [BUG] SKImage.FromEncodedData(String) returns image with broken alpha on GPU backend

[antongit]

Description

We are using 1.68.1 and see that SKImage.FromEncodedData(String) loads PNG images with broken alpha when drawn on GPU backend.

Code

using (var image = SKImage.FromEncodedData(path))
{
   canvas.DrawImage(image, new SKPoint(400.0f, 100.0f));
}

Expected & Actual Behavior

Basic Information

• Version with issue: 1.68.0, 1.68.1
• IDE: Visual Studio
• Platform Target Frameworks:
  
  
  
  • Windows Classic: Windows10
  
  
• Target Devices:
  
  
  
  • Desktop
  
  

Reproduction Link

SkiaApp.zip

[Mikolaytis]

This is not the only overload with this behavior. I've faced the same issue with Stream overload if I am remember it correctly. Fixed it by using of another overload.

[mattleibow]

I'll have a look and see what I can find out. Maybe something is broken in the decoder that is not using the correct alpha from the file - but - it works in raster...

[mattleibow]

Thanks for the issue. I got a fix building and it will be in the 1.68.1.1 release.