/// <summary>
/// Run the XObject with the given name
/// </summary>
private void RunXObject(string name)
{
var xobjectDict = xObjectManager.GetXObject(name);
var subType = xobjectDict.Elements.GetName(PdfKeys.Subtype);
if (subType != PdfKeys.Form)
{
return;
}
var cloneCurrentGraphicsState = currentGraphicsState.Clone();
var matrixArray = xobjectDict.Elements.GetArray(PdfKeys.Matrix);
Matrix matrix = Matrix.Identity;
if (matrixArray != null)
{
matrix = PdfUtilities.GetMatrix(matrixArray);
cloneCurrentGraphicsState.TransformationMatrix *= matrix;
}
cloneCurrentGraphicsState.FillAlpha.Layer = 1.0;
cloneCurrentGraphicsState.FillAlpha.Object = 1.0;
cloneCurrentGraphicsState.StrokeAlpha.Layer = 1.0;
cloneCurrentGraphicsState.StrokeAlpha.Object = 1.0;
cloneCurrentGraphicsState.SoftMask = null;
CSequence sequence = ContentReader.ReadContent(xobjectDict.Stream.UnfilteredValue);
var interpreter = new ContentInterpreter();
var group = interpreter.Run(xobjectDict, sequence, cloneCurrentGraphicsState);
// do some optimizations that the post-processor cannot do
if (group.Children.Count == 1 && group.Clip == null && !DoubleUtilities.IsEqual(currentGraphicsState.FillAlpha.Object, 1.0))
{
// the layer has only 1 child and the layer has an opacity set other than 1 ->
// recreate the layer but with the layer opacity set which gets "added" to each single object
// on that layer. Because there is only 1 object the result is the same as if the object sits
// on a semi transparent layer. That saves a group for a single object.
cloneCurrentGraphicsState = currentGraphicsState.Clone();
if (matrixArray != null)
{
cloneCurrentGraphicsState.TransformationMatrix *= matrix;
}
cloneCurrentGraphicsState.FillAlpha.Layer = currentGraphicsState.FillAlpha.Object;
cloneCurrentGraphicsState.StrokeAlpha.Layer = currentGraphicsState.StrokeAlpha.Object;
group = interpreter.Run(xobjectDict, sequence, cloneCurrentGraphicsState);
graphicGroup.Children.Add(group.Children[0]);
}
else
{
group.Opacity = currentGraphicsState.FillAlpha.Object;
graphicGroup.Children.Add(group);
}
}
