/**
* Process a content stream.
*
* @param contentStream the content stream
* @throws IOException if there is an exception while processing the stream
*/
private void processStream(PDContentStream contentStream) throws IOException {
PDResources parent = pushResources(contentStream);
Stack<PDGraphicsState> savedStack = saveGraphicsStack();
Matrix parentMatrix = initialMatrix;
// transform the CTM using the stream's matrix
getGraphicsState().getCurrentTransformationMatrix().concatenate(contentStream.getMatrix());
// the stream's initial matrix includes the parent CTM, e.g. this allows a scaled form
initialMatrix = getGraphicsState().getCurrentTransformationMatrix().clone();
// clip to bounding box
PDRectangle bbox = contentStream.getBBox();
clipToRect(bbox);
// processStreamOperators(contentStream);
initialMatrix = parentMatrix;
restoreGraphicsStack(savedStack);
popResources(parent);
}
