public static void Run()
{
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_Operators();
string imageFile = dataDir + "aspose-logo.jpg";
string inFile = dataDir + "DrawXFormOnPage.pdf";
string outFile = dataDir + "blank-sample2-out.pdf";
using (Document doc = new Document(inFile))
{
OperatorCollection pageContents = doc.Pages[1].Contents;
// the sample demonstrates
// GSave/GRestore operators usage
// ContatenateMatrix operator usage to position xForm
// Do operator usage to draw xForm on page
// wrap existing contents with GSave/GRestore operators pair
// this is to get initial graphics state at the and of existing contents
// otherwise there might remain some undesirable transformations at the end of existing operators chain
pageContents.Insert(1, new Operator.GSave());
pageContents.Add(new Operator.GRestore());
// add save graphics state operator to properly clear graphics state after new commands
pageContents.Add(new Operator.GSave());
#region create xForm
// create xForm
XForm form = XForm.CreateNewForm(doc.Pages[1], doc);
doc.Pages[1].Resources.Forms.Add(form);
form.Contents.Add(new Operator.GSave());
// define image width and heigh
form.Contents.Add(new Operator.ConcatenateMatrix(200, 0, 0, 200, 0, 0));
// load image into stream
Stream imageStream = new FileStream(imageFile, FileMode.Open);
// add image to Images collection of the XForm Resources
form.Resources.Images.Add(imageStream);
XImage ximage = form.Resources.Images[form.Resources.Images.Count];
// using Do operator: this operator draws image
form.Contents.Add(new Operator.Do(ximage.Name));
form.Contents.Add(new Operator.GRestore());
#endregion
pageContents.Add(new Operator.GSave());
// place form to the x=100 y=500 coordinates
pageContents.Add(new Operator.ConcatenateMatrix(1, 0, 0, 1, 100, 500));
// draw form with Do operator
pageContents.Add(new Operator.Do(form.Name));
pageContents.Add(new Operator.GRestore());
pageContents.Add(new Operator.GSave());
// place form to the x=100 y=300 coordinates
pageContents.Add(new Operator.ConcatenateMatrix(1, 0, 0, 1, 100, 300));
// draw form with Do operator
pageContents.Add(new Operator.Do(form.Name));
pageContents.Add(new Operator.GRestore());
// restore grahics state with GRestore after the GSave
pageContents.Add(new Operator.GRestore());
doc.Save(outFile);
}
}
