// ===========================================================================
public void Write(Stream stream)
{
// step 1
using (Document document = new Document()) {
// step 2
PdfWriter writer = PdfWriter.GetInstance(document, stream);
// step 3
document.Open();
// step 4
PdfContentByte cb = writer.DirectContent;
float gap = (document.PageSize.Width - 400) / 3;
PictureBackdrop(gap, 500, cb, writer);
PictureBackdrop(200 + 2 * gap, 500, cb, writer);
PictureBackdrop(gap, 500 - 200 - gap, cb, writer);
PictureBackdrop(200 + 2 * gap, 500 - 200 - gap, cb, writer);
PdfTemplate tp;
PdfTransparencyGroup group;
tp = cb.CreateTemplate(200, 200);
PictureCircles(0, 0, tp);
group = new PdfTransparencyGroup();
group.Isolated = true;
group.Knockout = true;
tp.Group = group;
cb.AddTemplate(tp, gap, 500);
tp = cb.CreateTemplate(200, 200);
PictureCircles(0, 0, tp);
group = new PdfTransparencyGroup();
group.Isolated = true;
group.Knockout = false;
tp.Group = group;
cb.AddTemplate(tp, 200 + 2 * gap, 500);
tp = cb.CreateTemplate(200, 200);
PictureCircles(0, 0, tp);
group = new PdfTransparencyGroup();
group.Isolated = false;
group.Knockout = true;
tp.Group = group;
cb.AddTemplate(tp, gap, 500 - 200 - gap);
tp = cb.CreateTemplate(200, 200);
PictureCircles(0, 0, tp);
group = new PdfTransparencyGroup();
group.Isolated = false;
group.Knockout = false;
tp.Group = group;
cb.AddTemplate(tp, 200 + 2 * gap, 500 - 200 - gap);
}
}
public virtual void TransparencyCheckTest1()
{
NUnit.Framework.Assert.That(() => {
PdfWriter writer = new PdfWriter(new MemoryStream());
Stream @is = new FileStream(sourceFolder + "sRGB Color Space Profile.icm", FileMode.Open, FileAccess.Read);
PdfOutputIntent outputIntent = new PdfOutputIntent("Custom", "", "http://www.color.org", "sRGB IEC61966-2.1"
, @is);
PdfADocument doc = new PdfADocument(writer, PdfAConformanceLevel.PDF_A_1B, outputIntent);
doc.AddNewPage();
PdfCanvas canvas = new PdfCanvas(doc.GetLastPage());
PdfFormXObject xObject = new PdfFormXObject(new Rectangle(100, 100));
PdfCanvas xObjCanvas = new PdfCanvas(xObject, doc);
xObjCanvas.Rectangle(30, 30, 10, 10).Fill();
PdfTransparencyGroup group = new PdfTransparencyGroup();
xObject.SetGroup(group);
canvas.AddXObject(xObject, new Rectangle(300, 300));
doc.Close();
}
, NUnit.Framework.Throws.InstanceOf <PdfAConformanceException>().With.Message.EqualTo(PdfAConformanceException.A_GROUP_OBJECT_WITH_AN_S_KEY_WITH_A_VALUE_OF_TRANSPARENCY_SHALL_NOT_BE_INCLUDED_IN_A_FORM_XOBJECT))
;
}
// ---------------------------------------------------------------------------
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 Write(Stream stream)
{
// step 1
using (Document document = new Document()) {
// step 2
PdfWriter writer = PdfWriter.GetInstance(document, stream);
// step 3
document.Open();
// step 4
PdfContentByte cb = writer.DirectContent;
float gap = (document.PageSize.Width - 400) / 3;
PictureBackdrop(gap, 500, cb);
PictureBackdrop(200 + 2 * gap, 500, cb);
PictureBackdrop(gap, 500 - 200 - gap, cb);
PictureBackdrop(200 + 2 * gap, 500 - 200 - gap, cb);
PictureCircles(gap, 500, cb);
cb.SaveState();
PdfGState gs1 = new PdfGState();
gs1.FillOpacity = 0.5f;
cb.SetGState(gs1);
PictureCircles(200 + 2 * gap, 500, cb);
cb.RestoreState();
cb.SaveState();
PdfTemplate tp = cb.CreateTemplate(200, 200);
PdfTransparencyGroup group = new PdfTransparencyGroup();
tp.Group = group;
PictureCircles(0, 0, tp);
cb.SetGState(gs1);
cb.AddTemplate(tp, gap, 500 - 200 - gap);
cb.RestoreState();
cb.SaveState();
tp = cb.CreateTemplate(200, 200);
tp.Group = group;
PdfGState gs2 = new PdfGState();
gs2.FillOpacity = 0.5f;
gs2.BlendMode = PdfGState.BM_HARDLIGHT;
tp.SetGState(gs2);
PictureCircles(0, 0, tp);
cb.AddTemplate(tp, 200 + 2 * gap, 500 - 200 - gap);
cb.RestoreState();
cb.ResetRGBColorFill();
ColumnText ct = new ColumnText(cb);
Phrase ph = new Phrase("Ungrouped objects\nObject opacity = 1.0");
ct.SetSimpleColumn(ph, gap, 0, gap + 200, 500, 18,
Element.ALIGN_CENTER
);
ct.Go();
ph = new Phrase("Ungrouped objects\nObject opacity = 0.5");
ct.SetSimpleColumn(ph, 200 + 2 * gap, 0, 200 + 2 * gap + 200, 500,
18, Element.ALIGN_CENTER
);
ct.Go();
ph = new Phrase(
"Transparency group\nObject opacity = 1.0\nGroup opacity = 0.5\nBlend mode = Normal"
);
ct.SetSimpleColumn(ph, gap, 0, gap + 200, 500 - 200 - gap, 18,
Element.ALIGN_CENTER
);
ct.Go();
ph = new Phrase(
"Transparency group\nObject opacity = 0.5\nGroup opacity = 1.0\nBlend mode = HardLight"
);
ct.SetSimpleColumn(ph, 200 + 2 * gap, 0, 200 + 2 * gap + 200,
500 - 200 - gap, 18, Element.ALIGN_CENTER
);
ct.Go();
}
}
