This is the Charles Weld .Net wrapper code. The first thing Convert() does
is call this method. Leptonica's picCreate() returns a null pointer
apparently.
public static Pix Create(int width, int height, int depth)
{
if (!AllowedDepths.Contains(depth))
throw new ArgumentException("Depth must be 1, 2, 4, 8, 16,
or 32 bits.", "depth");
if (width <= 0) throw new ArgumentException("Width must be
greater than zero", "width");
if (height <= 0) throw new ArgumentException("Height must be
greater than zero", "height");
var handle = Interop.LeptonicaApi.Native.pixCreate(width, height
, depth);
if (handle == IntPtr.Zero) throw new
InvalidOperationException("Failed
to create pix, this normally occurs because the requested image size is too
large, please check Standard Error Output.");
return Create(handle);
}
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