Also looking at pdf_reference_1.7.pdf from Adobe the Pattern object
should have a /Length [some value] and it dose not.
Also according to the same document, all but 2 of the options are
compulsory "Type" being one and the other is "Matrix" (which is missing)
I might add I am also looking at gs-bugzilla691715-1.pdf to spot what is
wrong and then looking stuff up, too see if it is needed.
to do the comparisons I am using PDFDebugger which is part of
pdfbox-app-2.0.1.jar
On 10/11/2016 09:46, clifford wrote:
This is my problem:-
PDPage page = new PDPage();
PDColorSpace cs =
PDColorSpace.create(COSName.PATTERN,page.getResources());
//or even dose not matter which one you choose
//PDColorSpace cs = new PDPattern(null, PDDeviceRGB.INSTANCE);
page.getResources().put(COSName.getPDFName("R9"), cs);
COSName cn = page.getResources().add(cs);
The above code is just to prove there is a bug, and I do not do this.
from the above code:-
cn should equal "R9" is dose not it equals "cs2". And there is another
resource item added.
when using class PDPageContentStream and calling method public void
setNonStrokingColor(PDColor color) throws IOException
with PDColor having it colour space set too cs from the above code
inside setNonStrokingColor it calls getName against the colour space
for PDColor and inside getName it dose the equivalent of the last line
of code from above
so the code it writes to the PDF file is
q
/cs2 cs
0.6 0.89804 0.6 /Patten1 scn
402.00864 419.82635 68.9668 16.31381 re
f
Q
which is wrong as it should be
q
/R9 cs
0.6 0.89804 0.6 /Patten1 scn
402.00864 419.82635 68.9668 16.31381 re
f
Q
inside class PDResources method public COSName add(PDColorSpace
colorSpace) calls private COSName add(COSName kind, String prefix,
COSObjectable object) and in this method there is a line if (dict !=
null && dict.containsValue(object.getCOSObject()))
the object is the original cs (PDColorSpace from above code) and it
dose is not find a result for getCOSObject() which is the COSArray
with the COSName.PATTERN in it.
On 10/11/2016 06:19, Tilman Hausherr wrote:
Slightly simpler version of example, works only with the recent
commit that sets the correct defaults for PDTilingPattern:
import java.io.IOException;
import java.io.OutputStream;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSStream;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.PDResources;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.graphics.color.PDColor;
import org.apache.pdfbox.pdmodel.graphics.color.PDColorSpace;
import org.apache.pdfbox.pdmodel.graphics.color.PDDeviceRGB;
import org.apache.pdfbox.pdmodel.graphics.color.PDPattern;
import org.apache.pdfbox.pdmodel.graphics.pattern.PDTilingPattern;
import org.apache.pdfbox.util.Charsets;
/**
*
* @author Tilman Hausherr
*/
public class CreatePatterns
{
public static void main(String[] args) throws IOException
{
PDDocument doc = new PDDocument();
PDPage page = new PDPage();
doc.addPage(page);
page.setResources(new PDResources());
PDPageContentStream pcs = new PDPageContentStream(doc, page);
// Colored pattern
PDColorSpace patternCS1 =
PDColorSpace.create(COSName.PATTERN, page.getResources());
// Table 75 spec
PDTilingPattern tilingPattern1 = new PDTilingPattern();
tilingPattern1.setBBox(new PDRectangle(0, 0, 10, 10));
tilingPattern1.setPaintType(PDTilingPattern.PAINT_COLORED);
tilingPattern1.setTilingType(PDTilingPattern.TILING_CONSTANT_SPACING);
tilingPattern1.setXStep(10);
tilingPattern1.setYStep(10);
COSName patName1 = page.getResources().add(tilingPattern1);
//TODO Problem: there's no way to create something like a
PDPageContentStream
OutputStream os1 =
tilingPattern1.getContentStream().createOutputStream();
os1.write("1 0 0 RG 0 0 m 10 10 l
s".getBytes(Charsets.US_ASCII));
os1.close();
PDColor pdColour1 = new PDColor(
new float[0],
patName1,
patternCS1);
pcs.addRect(0, 0, 500, 700);
pcs.setNonStrokingColor(pdColour1);
pcs.fill();
// Uncolored pattern
PDTilingPattern tilingPattern2 = new PDTilingPattern();
tilingPattern2.setBBox(new PDRectangle(0, 0, 10, 10));
tilingPattern2.setPaintType(PDTilingPattern.PAINT_UNCOLORED);
tilingPattern2.setTilingType(PDTilingPattern.TILING_NO_DISTORTION);
tilingPattern2.setXStep(10);
tilingPattern2.setYStep(10);
COSName patName2 = page.getResources().add(tilingPattern2);
OutputStream os2 =
tilingPattern2.getContentStream().createOutputStream();
os2.write("0 10 m 10 0 l s".getBytes(Charsets.US_ASCII));
os2.close();
PDColorSpace patternCS2 = new PDPattern(null,
PDDeviceRGB.INSTANCE); //TODO weird - factory can't be used?
PDColor pdColour2 = new PDColor(
new float[]{0,1,0},
patName2,
patternCS2);
pcs.addRect(100, 100, 500, 500);
pcs.setNonStrokingColor(pdColour2);
pcs.fill();
pcs.close();
doc.save("patterns.pdf");
doc.close();
}
}
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