Load BitmapImage into WriteableBitmap but no method existing

倖福魔咒の 提交于 2019-12-30 12:23:26

问题


The constructor of WriteableBitmap class with Windows 8 only takes two arguments: the height and the width of this object. Meanwhile with Silverlight it accepts a BitmapImage object as argument. (Verified on MSDN : WriteableBitmap.WriteableBitmap constructor)

I would like to load this BitmapImage because I'm trying to blur an image which already exists on my Assets folder.


回答1:


Thanks for your help, I succeed to blur my image. Here is the sample in order to link the BitmapImage into the WriteableBitmap object :

BitmapImage bi = new BitmapImage(new Uri(filename, UriKind.RelativeOrAbsolute));
WriteableBitmap wb = new WriteableBitmap(bi.PixelWidth, bi.PixelHeight);

var streamFile = await GetFileStream(myFile);
await wb.SetSourceAsync(streamFile);
wb = wb.Convolute(WriteableBitmapExtensions.KernelGaussianBlur5x5);

Then just write the WriteableBitmap into the LocalStorage !




回答2:


You should be able to load a BitmapImage into WritableBitmap like this:

WriteableBitmap writableBitmap = new WriteableBitmap(bitmapImage);

See here WriteableBitmap Constructor (BitmapSource)



来源:https://stackoverflow.com/questions/23287303/load-bitmapimage-into-writeablebitmap-but-no-method-existing

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