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Posted to users@pdfbox.apache.org by Floris <fn...@gmail.com> on 2015/03/25 22:52:09 UTC
PDDeviceN
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
Re: PDDeviceN
Posted by Floris <fn...@gmail.com>.
Nice! The app-1.8.10-20150327.210556-4 snapshot seems to work indeed.
Thanks Tilman.
Have a nice day,
Floris
On 28-3-2015 07:07, Tilman Hausherr wrote:
> You can find a snapshot version for testing here:
> https://repository.apache.org/content/groups/snapshots/org/apache/pdfbox/pdfbox-app/1.8.10-SNAPSHOT/
>
> (use the one at the bottom. It includes pdfbox, fontbox and jempbox)
>
> The issue I created is
> https://issues.apache.org/jira/browse/PDFBOX-2734
>
> Please tell me if it works now.
>
> Tilman
>
>
> Am 27.03.2015 um 18:07 schrieb Tilman Hausherr:
>> Your code is correct. I found at three (!!!) bugs in our 1.8 code and
>> I will create an issue in JIRA and come back to you. Be patient :-)
>> Should a black rectangle appear?
>>
>> Do you have a more advanced postscript code so that one can see that
>> "something happens" with the 5th and 6th color?
>
>
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> To unsubscribe, e-mail: users-unsubscribe@pdfbox.apache.org
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>
Re: PDDeviceN
Posted by Tilman Hausherr <TH...@t-online.de>.
You can find a snapshot version for testing here:
https://repository.apache.org/content/groups/snapshots/org/apache/pdfbox/pdfbox-app/1.8.10-SNAPSHOT/
(use the one at the bottom. It includes pdfbox, fontbox and jempbox)
The issue I created is
https://issues.apache.org/jira/browse/PDFBOX-2734
Please tell me if it works now.
Tilman
Am 27.03.2015 um 18:07 schrieb Tilman Hausherr:
> Your code is correct. I found at three (!!!) bugs in our 1.8 code and
> I will create an issue in JIRA and come back to you. Be patient :-)
> Should a black rectangle appear?
>
> Do you have a more advanced postscript code so that one can see that
> "something happens" with the 5th and 6th color?
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Re: PDDeviceN
Posted by Tilman Hausherr <TH...@t-online.de>.
Your code is correct. I found at three (!!!) bugs in our 1.8 code and I
will create an issue in JIRA and come back to you. Be patient :-) Should
a black rectangle appear?
Do you have a more advanced postscript code so that one can see that
"something happens" with the 5th and 6th color?
Tilman
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Re: PDDeviceN
Posted by Floris <fn...@gmail.com>.
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.*)
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@pdfbox.apache.org
> For additional commands, e-mail: users-help@pdfbox.apache.org
>
Re: PDDeviceN
Posted by Tilman Hausherr <TH...@t-online.de>.
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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