protected override void AddPageImpl(float width, float height)
{
if (_closed)
{
throw new Exception("Unable to add a page because the PDFContext is already closed.");
}
if (_data == null)
{
_data = new NSMutableData();
var consumer = new CGDataConsumer(_data);
_context = new CGContextPDF(consumer, CGRect.Empty, null);
_context.SetFillColorSpace(CGColorSpace.CreateDeviceRGB());
_context.SetStrokeColorSpace(CGColorSpace.CreateDeviceRGB());
}
if (_pageOpen)
{
_context.EndPage();
}
_context.BeginPage(new CGRect(0, 0, width, height));
_context.TranslateCTM(0, height);
_context.ScaleCTM(1, -1);
_context.SetLineWidth(1);
_context.SetFillColor(new CGColor(1, 1));
_context.SetStrokeColor(new CGColor(0, 1));
_pageOpen = true;
_canvas.Context = _context;
}