B4J Question [SOLVED] Free Hand Drawing

[micro]

Hi to all
i am using the example of erel with canvas to trace the mouse movement on a B4xView(Pane) and save it as Bitmap on a B4xImageView
Thi's is the result

imgTrace.Bitmap = cvsDrawing.CreateBitmap

then I save the image as a blob in a database

Dim base as String = Base64EncodeDecodeImage.Base64ImageToString2(imgTrace.Bitmap)

When I reload the image from the database, I find the black background, classic of a PNG with a transparent background.

How can i bring back the Bitmap with a white background?
Changing the pixels?
And if before capturing the canvas I transform the bitmap into jpeg

Thanks to all.

 

[Erel]

Make it white:

B4XCanvas.DrawRect(B4XCanvas.TargetRect, xui.Color_White, True, 0)

 

[micro]

Make it white:

B4XCanvas.DrawRect(B4XCanvas.TargetRect, xui.Color_White, True, 0)

Thanks Erel, now work fine.

 

[TILogistic]

See sample Signature
Image to base64 and base64 to Image:

B4J and B4A

Lienzo para firma electronica con el dedo

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