Tilman, thank you very much for your response. I tried to implement your
suggestion but unfortunately without luck. It just produces:
6 0 obj
<<
/Cs1 /DeviceGray
/Cs2 /DeviceN
>>
endobj
Here is a working example of my trial. I am indeed using PDFBox version
1.8.8 and Java 1.8.0_40-ea.
packagecom.here.devicentest;
importorg.apache.pdfbox.cos.*;
importorg.apache.pdfbox.exceptions.COSVisitorException;
importorg.apache.pdfbox.io.RandomAccessBuffer;
importorg.apache.pdfbox.pdmodel.PDDocument;
importorg.apache.pdfbox.pdmodel.PDPage;
importorg.apache.pdfbox.pdmodel.PDResources;
importorg.apache.pdfbox.pdmodel.common.PDRectangle;
importorg.apache.pdfbox.pdmodel.common.function.PDFunctionType4;
importorg.apache.pdfbox.pdmodel.edit.PDPageContentStream;
importorg.apache.pdfbox.pdmodel.font.PDFont;
importorg.apache.pdfbox.pdmodel.font.PDType1Font;
importorg.apache.pdfbox.pdmodel.graphics.color.*;
importjava.io.IOException;
importjava.io.OutputStream;
importjava.lang.String;
importjava.lang.System;
importjava.util.Arrays;
importjava.util.HashMap;
importjava.util.Map;
public classDeviceNTest {
public static voidmain(String[] args) {
try{
WritePDF("MyDeviceN_Test.pdf");
System.out.println("Done Writing!");
}catch(IOException e) {
e.printStackTrace();
}catch(COSVisitorException e) {
e.printStackTrace();
}
}
public static voidWritePDF(String filename)throwsIOException,
COSVisitorException {
// Construct the PDF document
PDDocument doc =newPDDocument();
// Construct the only page.
PDPage pdpage =newPDPage();
// Specify the media box.
PDRectangle mediabox =newPDRectangle(50,50);
pdpage.setMediaBox( mediabox );
// Specify the fonts.
PDFont currentfont = PDType1Font.HELVETICA;
// Specify the color spaces.
Map<String, PDColorSpace> colorspaces =newHashMap<String,
PDColorSpace>();
// Specify DeviceGray for text.
PDColorSpace cs1 =newPDDeviceGray();
// Add the color sapce to the color space map.
colorspaces.put("Cs1", cs1);
// Specify DeviceN for a rectangle.
/*
DeviceN
- Color Names
- Alternate Color Space
- Tint Transform Function
- Attributes
*/
PDDeviceN cs2 =newPDDeviceN();
// - Color Names
cs2.setColorantNames(Arrays.asList("Cyan","Magenta","Yellow","Black","Orange","Green"));
// - Alternate Color Space
cs2.setAlternateColorSpace(PDDeviceCMYK.INSTANCE);
// - Tint Transform
/*
Function Type 4
- Domain
- Range
- Length
- Type
- Stream (containing the PS code).
*/
// - Domain
COSArray domains =newCOSArray();
domains.setFloatArray(new float[]{0,1,0,1,0,1,0,1,0,1,0,1});
// - Range
COSArray ranges =newCOSArray();
ranges.setFloatArray(new
float[]{0.0f,1.0f,0.0f,1.0f,0.0f,1.0f,0.0f,1.0f});
// - Dictionary
COSDictionary functiondata =newCOSDictionary();
functiondata.setItem(COSName.FUNCTION_TYPE, COSInteger.get(4));
functiondata.setItem(COSName.DOMAIN, domains);
functiondata.setItem(COSName.RANGE, ranges);
functiondata.setItem(COSName.TYPE, COSName.FUNCTION);
// - Stream
String functionText ="{pop pop}";
COSStream functionStream
=newCOSStream(functiondata,newRandomAccessBuffer());
OutputStream out = functionStream.createUnfilteredStream();
out.write(functionText.getBytes("US-ASCII"));
out.close();
// Construct the tint transform function.
PDFunctionType4 tinttransformfunction = (PDFunctionType4)
PDFunctionType4.create(functionStream);
// Add it to the color space.
cs2.setTintTransform(tinttransformfunction);
// - Attributes (just an empty dictionary)
PDDeviceNAttributes attribs =newPDDeviceNAttributes();
cs2.setAttributes(attribs);
// Add the color space to the color space map.
colorspaces.put("Cs2", cs2);
// Add the color space map to the page resources.
PDResources res =newPDResources();
pdpage.setResources(res);
pdpage.getResources().setColorSpaces(colorspaces);
// Add the page to the document.
doc.addPage( pdpage );
// Specify the page (pdpage) contents of the PDF file (doc).
PDPageContentStream contentStream =newPDPageContentStream(doc,
pdpage,false,false);
/*
Add a rectangle to the page.
*/
// Set color space
contentStream.setNonStrokingColorSpace(cs2);
contentStream.setNonStrokingColor(new float[]{1,1,1,1,1,1});
contentStream.fillRect(10,10,20,20);
/*
Add some text (Hello World) to the page.
*/
contentStream.beginText();
floatinitialpointX =0;
floatinitialpointY =0;
contentStream.moveTextPositionByAmount(10,10);
contentStream.setNonStrokingColorSpace(cs1);
contentStream.setStrokingColor(0.9);
contentStream.drawString("Hello World!");
contentStream.endText();
// Close the stream.
contentStream.close();
// Finally save the document.
doc.save( filename );
// Close the document.
if( doc !=null) {
try{
doc.close();
}catch(IOException e) {
e.printStackTrace();
}
}
}
}
On 26-3-2015 17:25, Tilman Hausherr wrote:
Am 25.03.2015 um 22:52 schrieb Floris:
Hey there,
I am struggeling getting the PDDeviceN color space to work. I am
trying to create a simple page with one rectangle having a color
defined against a DeviceN space. I tried the following:
PDDeviceN cs =newPDDeviceN();
cs.setAlternateColorSpace(PDDeviceCMYK.INSTANCE);
cs.setColorantNames(Arrays.asList("Cyan","Magenta","Yellow","Black","Orange","Green"));
PDFunction func;
COSArray domains =newCOSArray();
COSArray ranges =newCOSArray();
domains.setFloatArray(new
float[]{0.0f,1.0f,0.0f,1.0f,0.0f,1.0f,0.0f,1.0f,0.0f,1.0f,0.0f,1.0f});
ranges.setFloatArray(new
float[]{0.0f,1.0f,0.0f,1.0f,0.0f,1.0f,0.0f,1.0f});
COSDictionary dict=newCOSDictionary();
dict.setItem(COSName.FUNCTION_TYPE, COSInteger.get(4));
dict.setItem(COSName.DOMAIN, domains);
dict.setItem(COSName.RANGE, ranges);
try{
func = PDFunction.create(tintdata);
cs.setTintTransform(func);
}catch(IOException e) {
e.printStackTrace();
}
This results in a NullPointerError in the first row of the try-part.
The type4-function should just pop the first two values (to get from
CMYKOG to CMYK). Could someone give me a jump start on how to define
a PDDeviceN space?
Have a nice day,
Floris
Hello,
- tintdata is not defined
- the postscript code of the type4 function is missing
Here's an excerpt of a PDF file with a type 4 function:
48 0 obj
<<
/FunctionType 4
/Domain [0 1]
/Range [0 1 0 1 0 1 0 1]
/Length 62
>>
stream
{dup 0.37 mul exch dup 0 mul exch dup 0.34 mul exch 0.34 mul }
endstream
endobj
i.e. your function must have a stream which contains the postscript
code. Thus call PDFunction.create() with a COStream. This object
should have the dictionary that you already have, and as stream the
"code" of the function.
COSDictionary dict=newCOSDictionary();
dict.setItem(COSName.FUNCTION_TYPE, COSInteger.get(4));
dict.setItem(COSName.DOMAIN, domains);
dict.setItem(COSName.RANGE, ranges);
String functionText = "{ push pop whatever }";
COSStream functionStream = new COSStream(dict, new RandomAccessBuffer());
OutputStream out = functionStream.createUnfilteredStream();
out.write(functionText.getBytes("US-ASCII"));
out.close();
func = PDFunction.create(functionStream);
I didn't test this code. If it doesn't work, please post some complete
code that creates a PDF (that fails) and I'll try to help you more
(However I can't help you with the postscript code).
Tilman
PS: always mention the version when you ask a question (in your case
probably 1.8.*)
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