public void Verify_ClippingPath_CanBeCreated()
{
var pdfFilePath = TestUtils.GetOutputFileName();
var stream = new FileStream(pdfFilePath, FileMode.Create);
// step 1
var document = new Document();
// step 2
PdfWriter writer = PdfWriter.GetInstance(document, stream);
// step 3
document.AddAuthor(TestUtils.Author);
document.Open();
// step 4
var img = Image.GetInstance(TestUtils.GetImagePath("hitchcock.png"));
float w = img.ScaledWidth;
float h = img.ScaledHeight;
PdfTemplate t = writer.DirectContent.CreateTemplate(850, 600);
t.Ellipse(0, 0, 850, 600);
t.Clip();
t.NewPath();
t.AddImage(img, w, 0, 0, h, 0, -600);
Image clipped = Image.GetInstance(t);
clipped.ScalePercent(50);
document.Add(clipped);
document.Close();
stream.Dispose();
TestUtils.VerifyPdfFileIsReadable(pdfFilePath);
}
// ---------------------------------------------------------------------------
public byte[] CreatePdf()
{
using (MemoryStream ms = new MemoryStream()) {
// step 1
using (Document document = new Document()) {
// step 2
PdfWriter writer = PdfWriter.GetInstance(document, ms);
// step 3
document.Open();
// step 4
Image img = Image.GetInstance(
Path.Combine(Utility.ResourceImage, RESOURCE)
);
float w = img.ScaledWidth;
float h = img.ScaledHeight;
PdfTemplate t = writer.DirectContent.CreateTemplate(850, 600);
t.Ellipse(0, 0, 850, 600);
t.Clip();
t.NewPath();
t.AddImage(img, w, 0, 0, h, 0, -600);
Image clipped = Image.GetInstance(t);
clipped.ScalePercent(50);
document.Add(clipped);
}
return(ms.ToArray());
}
}
// ---------------------------------------------------------------------------
public byte[] CreatePdf()
{
using (MemoryStream ms = new MemoryStream()) {
// step 1
using (Document document = new Document(new Rectangle(850, 600))) {
// step 2
PdfWriter writer = PdfWriter.GetInstance(document, ms);
// step 3
document.Open();
// step 4
PdfContentByte canvas = writer.DirectContent;
// add the clipped image
Image img = Image.GetInstance(
Path.Combine(Utility.ResourceImage, RESOURCE)
);
float w = img.ScaledWidth;
float h = img.ScaledHeight;
canvas.Ellipse(1, 1, 848, 598);
canvas.Clip();
canvas.NewPath();
canvas.AddImage(img, w, 0, 0, h, 0, -600);
// Create a transparent PdfTemplate
PdfTemplate t2 = writer.DirectContent.CreateTemplate(850, 600);
PdfTransparencyGroup transGroup = new PdfTransparencyGroup();
transGroup.Put(PdfName.CS, PdfName.DEVICEGRAY);
transGroup.Isolated = true;
transGroup.Knockout = false;
t2.Group = transGroup;
// Add transparent ellipses to the template
int gradationStep = 30;
float[] gradationRatioList = new float[gradationStep];
for (int i = 0; i < gradationStep; i++)
{
/*
* gotta love .NET, guess they forgot to copy java.lang.Math.toRadians
*/
double radians = (Math.PI / 180) * 90.0f / gradationStep * (i + 1);
gradationRatioList[i] = 1 - (float)Math.Sin(radians);
}
for (int i = 1; i < gradationStep + 1; i++)
{
t2.SetLineWidth(5 * (gradationStep + 1 - i));
t2.SetGrayStroke(gradationRatioList[gradationStep - i]);
t2.Ellipse(0, 0, 850, 600);
t2.Stroke();
}
// Create an image mask for the direct content
PdfDictionary maskDict = new PdfDictionary();
maskDict.Put(PdfName.TYPE, PdfName.MASK);
maskDict.Put(PdfName.S, new PdfName("Luminosity"));
maskDict.Put(new PdfName("G"), t2.IndirectReference);
PdfGState gState = new PdfGState();
gState.Put(PdfName.SMASK, maskDict);
canvas.SetGState(gState);
canvas.AddTemplate(t2, 0, 0);
}
return(ms.ToArray());
}
}
public void DrawEllipse(Pen2 pen, float x, float y, float width, float height)
{
SetPen(pen);
template.Ellipse(x, currentHeight - y, x + width, currentHeight - (y + height));
template.Stroke();
}