Dear Tilman, thank very much for the hint with the transformation matrix. This way I can create the elliptic shading!
Klaus Sitz der Gesellschaft / Corporate Headquarters: Lufthansa Systems AS GmbH, Norderstedt, Registereintragung / Registration: Amtsgericht Norderstedt 3688NO Geschaeftsfuehrung / Management Board: Bernd Appel -----Ursprüngliche Nachricht----- Von: Tilman Hausherr [mailto:[email protected]] Gesendet: Dienstag, 14. Oktober 2014 18:17 An: [email protected] Betreff: Re: Shading of an elliptic form You can do this by using a transformation matrix with different x and y scales. See PDFBOX-2217, it has a sample PDF. Note that correct rendering is not yet supported. Tilman Am 14.10.2014 um 17:39 schrieb [email protected]: > > Hello, > > I'm validating the use of pdfbox 1.8.6 for the creation of a pdf file > for an editor. > > Therefore I need to create a shading within an ellipse, which looks > like the following: > > I wrote a test program, which creates a *circular* shading: > > *public**static**void*main(String[] args) { > > /testLinearGradient/(); > > /testCircularGradient/(); > > } > > *public**static**void*testCircularGradient() { > > *try*{ > > *float*width = 600.0f; > > *float*height = 600.0f; > > PDRectangle sizePDF = *new*PDRectangle(width, height); > > PDDocument document = *new*PDDocument(); > > PDPage page = *new*PDPage(sizePDF); > > document.addPage(page); > > // shading attributes > > COSDictionary dict = *new*COSDictionary(); > > dict.setInt(COSName./SHADING_TYPE/, 3); > > dict.setName(COSName./COLORSPACE/, "DeviceRGB"); > > COSArray coords = *new*COSArray(); > > coords.add(COSInteger./get/(300)); //x1 > > coords.add(COSInteger./get/(300)); //y1 > > coords.add(COSInteger./get/(300)); //x2 > > coords.add(COSInteger./get/(300)); //y2 > > *int*radius = 300; > > coords.add(COSInteger./get/(radius)); //r1 > > coords.add(COSInteger./get/(0)); //r2 > > dict.setItem(COSName./COORDS/, coords); > > // function with attributes > > COSDictionary fdict = *new*COSDictionary(); > > fdict.setInt(COSName./FUNCTION_TYPE/, 2); > > COSArray domain = *new*COSArray(); > > domain.add(COSInteger./get/(0)); > > domain.add(COSInteger./get/(1)); > > COSArray c0 = *new*COSArray(); > > c0.add(COSFloat./get/("1")); //color 1 red > > c0.add(COSFloat./get/("0")); > > c0.add(COSFloat./get/("0")); > > COSArray c1 = *new*COSArray(); > > c1.add(COSFloat./get/("0")); // _color_ 2 _blue_ > > c1.add(COSFloat./get/("0")); > > c1.add(COSFloat./get/("1")); > > fdict.setItem(COSName./DOMAIN/, domain); > > fdict.setItem(COSName./C0/, c0); > > fdict.setItem(COSName./C1/, c1); > > fdict.setFloat(COSName./N/, 1.0f); > > dict.setItem(COSName./FUNCTION/, fdict); > > PDShadingType3 shading = *new*PDShadingType3(dict); > > // create and add to shading resources > > page.setResources(*new*PDResources()); > > _Map_ shadings = *new*_HashMap_(); > > _shadings.put(__"sh1"__, (PDShadingResources) shading)_; > > page.getResources().setShadings(_shadings_); > > // invoke shading from content stream > > PDPageContentStream contentStream = *new* > > PDPageContentStream(document, page, *true*, *false*); > > contentStream.appendRawCommands("/sh1 sh"); > > contentStream.close(); > > document.save("c:\\pdfCircularGradient.pdf"); > > document.close(); > > } *catch*(Exception e) { > > System./out/.println(" error creating pdf file."+ > e.toString()); > > } > > } > > Does anyone has an idea, how I can change the program, so it will > create an elliptic shading. > > Is an elliptic shading supported by the pdf specification? > > Thanks > > Klaus Graaf > > Sitz der Gesellschaft / Corporate Headquarters: Lufthansa Systems AS > GmbH, Norderstedt, Registereintragung / Registration: Amtsgericht > Norderstedt 3688NO Geschaeftsfuehrung / Management Board: Bernd Appel > >
