why the WriteableBitmap doesn't work?

[myot233]

I'd like to call the method shown in the image below to do some image-related processing, but I've found that if I add an arbitrary asynchronous statement above the var data = new byte[415800]; the WriteableBitmap returned by this function won't be displayed, and I'm also trying to read out the pixelbuffer, which is exactly what I entered.

this is where the method is called

if there are more easy way to do some image-related processing in WinUI3,please tell me about it

New to WinUI3 and C# Asynchronous programming, I don't understand why it doesn't work。

[lhak]

How does your XAML code look like? I guess you also need to call Invalidate() on AnimImageSource and not img.

[castorix]

if there are more easy way to do some image-related processing in WinUI3,please tell me about it

MS samples use Win2D and GaussianBlurEffect Class for Blur effect, like in WindowsCompositionSamples
I prefer to use directly Direct2D and Gaussian blur effect
A test with D2D1_GAUSSIANBLUR_PROP_STANDARD_DEVIATION = 3 and 10 :

[castorix]

I just uploaded a test sample with most of Direct2D effects : WinUI3_Direct2D_Effects
I added some image transiton animations (I tried to find ideas from Google, mainly animations I found in Adobe After Effects demos, but some are difficult to reproduce...)