public long AllocateImage()
{
var size = ComputeTotalImageSize();
image = SKMask.AllocateImage(size);
return(size);
}
public void FreeImage()
{
if (image != IntPtr.Zero)
{
SKMask.FreeImage(image);
image = IntPtr.Zero;
}
}
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);
}
public bool InstallMaskPixels(SKMask mask)
{
return(SkiaApi.sk_bitmap_install_mask_pixels(Handle, ref mask));
}
