[BUG] Decode PNG image problem

[KyungtackKim]

Description

When decoding a PNG image, some areas of the image crack.

Code

// path = PNG image file path
// get bitmap
using (var bitmap = SKBitmap.Decode(path))
{
    // check image size
    if (bitmap.Info.Width <= 4096 || bitmap.Info.Height <= 4096)
    {
        // get scale information
        var scale = Math.Min(1280.0f / bitmap.Width, 800.0f / bitmap.Height);
        var x = (1280 - scale * bitmap.Width) / 2;
        var y = (800 - scale * bitmap.Height) / 2;
        var rect = new SKRect(x, y, x + scale * bitmap.Width, y + scale * bitmap.Height);
        // draw image
        canvas.DrawBitmap(bitmap, rect,
            new SKPaint { IsAntialias = true, FilterQuality = SKFilterQuality.High });
    }
}

Expected Behavior

Actual Behavior

Basic Information

• Version with issue: SkiaSharp.Views.WindowsForms v2.88.0
• Last known good version: SkiaSharp.Views.WindowsForms v2.80.4
• IDE: Visual studio 2019
• Platform Target Frameworks: WinForm .NetFramework 4.8
• Target Devices: Windows 11

Detailed IDE/OS information (click to expand)

PASTE ANY DETAILED VERSION INFO HERE

Screenshots

( v2.80.4 )

( v2.88.0 )

Reproduction Link

image file download : https://hantas-my.sharepoint.com/:i:/g/personal/kyungtack_kim_hantas_kr/EX0xZOqr7TlDv6NVZOs4rcYB2i1jZHhxte9U6CfGoweCkg?e=7y0T3X

[mgood7123]

0.0 holy crap

[miszu]

Noticed similar issues with jpg - interesting fact is that it works fine when running in Xamarin.iOS iPhone simulator environment, but doesn't work in a unit test env (MacBook M1, NET 6.0) - sometimes these random artefacts appear, as posted by @KyungtackKim.

[PhotonSPK]

this should be fixed at 2.88.1-pre1. have you try it?

[miszu]

@AkulaKirov I checked and it fixed my issues, thanks a lot! 🙌🏻 Hopefully worked for @KyungtackKim as well.

[miszu]

Would be awesome to see a hotfix version with this image loading issue fixed - let me know if I can test something more or provide more feedback. We've used the 2.88.1-pre1 since a week and haven't seen any problems 🙌🏻

[KyungtackKim]

@miszu

Thank you for the update. I am also using 2.88.1-peview.1 and this problem no longer appears.