Windows Phone 8 blitting

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Is blitting operation available on Windows Phone 8 (not 7.5)? I have not found way. I need create an image and blitting to it from images in 'assets' resources. So.

C#

//load source image
BitmapImage bi = new BitmapImage( new Uri("/Assets/skin_01.png", UriKind.Relative) );

//create new bitmap
WriteableBitmap wa_bmp = new WriteableBitmap( 64, 64);

//how to blitting from bi to wa_bmp ???

Thank you.

Posted 6-Oct-14 1:57am

Style-7

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Style-7 · Answer 1 · 2014-10-08T03:06:00

C#

private void CopyImageRect( WriteableBitmap dest, WriteableBitmap source, int xd, int yd, int xs, int ys, int dx, int dy ){
    int dxd = dest.PixelWidth;
    int dxs = source.PixelWidth;
    int y,x;
    for( y = 0; y < dy; y++){
        for( x = 0; x < dx ; x++){
            dest.Pixels[ (y+yd)*dxd + xd + x  ] = source.Pixels[ (y+ys)*dxs + xs + x ];
        }
    }
}
//EXAMPLE
//load image from assets
BitmapImage source_wb = new BitmapImage( new Uri("/Assets/my_image.png", UriKind.Relative) );
// WARNING this next line very important
bi.CreateOptions = BitmapCreateOptions.None;

WriteableBitmap dest_wb = new WriteableBitmap( 64, 64 );
//blitting
CopyImageRect( dest_wb, source_wb, 64, 0, 0, 0, 64, 64);