/// <summary>
/// Draw this image to the current OpenVG drawing surface.
/// </summary>
public void Draw()
{
if (handle == null)
{
throw new ObjectDisposedException("Some Image");
}
VG.vgDrawImage(handle);
VG.DetectError("Draw Image failed");
draws.Add(1.0);
}
internal void Draw()
{
if (handle == null)
{
throw new ObjectDisposedException("Some Path");
}
VG.vgDrawPath(handle);
VG.DetectError("Draw Path failed");
draws.Add(1.0);
}
/// <summary>
/// Sets the image contents
/// </summary>
/// <param name="data">The pixel data</param>
/// <param name="scanlinestride">Offset for consecutive scan lines of the image in data.</param>
/// <param name="destination">The rectangle of the image to fill</param>
/// <remarks>
/// The pixels should be packed into data with the pixel format used to construct this image.
/// There is no offset between pixels on a line. Consecutive lines are placed at scanlinestride intervals, measured
/// from line start to line start.
/// </remarks>
public void SetImageData(byte[] data, int scanlinestride, Rect destination)
{
if (handle == null)
{
throw new ObjectDisposedException("Some Image");
}
int lastbyte = (scanlinestride * ((int)destination.size.y - 1)) + (int)destination.size.x;
if (data == null || lastbyte < 0 || data.Length < lastbyte)
{
throw new ArgumentException("Expected " + lastbyte + " bytes, got " + (data == null ? "null" : data.Length.ToString()));
}
VG.vgImageSubData(handle, data, scanlinestride, Format, destination.pos.x, destination.pos.y, destination.size.x, destination.size.y);
VG.DetectError("Set image data failed");
}
protected override void Load()
{
IntPtr hnd = VG.vgCreatePath(0, 3, 1, 0, 0, 0, 6);
if (hnd == IntPtr.Zero)
{
throw new Exception("Error creating Path " + VG.vgGetError());
}
handle = new Handle("OpenVG Path", hnd, delegate(IntPtr h)
{
VG.vgDestroyPath(h);
});
List <byte> segments = new List <byte>();
List <float> data = new List <float>();
foreach (Segment s in source())
{
segments.Add((byte)s.type);
data.AddRange(s.data);
}
VG.vgAppendPathData(handle, segments.Count, segments.ToArray(), data.ToArray());
VG.DetectError("Unable to append path data");
}