public SKMask(IntPtr image, SKRectI bounds, UInt32 rowBytes, SKMaskFormat format)
{
fBounds = bounds;
fRowBytes = rowBytes;
fFormat = format;
fImage = (byte *)image;
}
public SKMask(SKRectI bounds, UInt32 rowBytes, SKMaskFormat format)
{
this.bounds = bounds;
this.rowBytes = rowBytes;
this.format = format;
this.image = IntPtr.Zero;
}
public SKMask(SKRectI bounds, UInt32 rowBytes, SKMaskFormat format)
{
fBounds = bounds;
fRowBytes = rowBytes;
fFormat = format;
fImage = null;
}
public static SKMask Create(byte[] image, SKRectI bounds, UInt32 rowBytes, SKMaskFormat format)
{
// create the mask
var mask = new SKMask(bounds, rowBytes, format);
// is there the right amount of space in the mask
if (image.Length != mask.ComputeTotalImageSize())
{
// Note: buffer.Length must match bounds.Height * rowBytes
var expectedHeight = bounds.Height * rowBytes;
var message = $"Length of image ({image.Length}) does not match the computed size of the mask ({expectedHeight}). Check the {nameof(bounds)} and {nameof(rowBytes)}.";
throw new ArgumentException(message);
}
// copy the image data
mask.AllocateImage();
Marshal.Copy(image, 0, mask.image, image.Length);
// return the mask
return(mask);
}
