Thanks.
I've added the code to our existing custom "process()" function.... it
looks like this:
public void process(Operator operator, List<COSBase> operands) throws
> IOException {
> if (operands.isEmpty()) {
> throw new MissingOperandException(operator, operands);
> } else {
> COSBase base0 = operands.get(0);
> if (base0 instanceof COSName) {
> COSName objectName = (COSName)base0;
>
>
>
>
> *// Disable alpha for lines, etc PDExtendedGraphicsState gs
> = context.getResources().getExtGState(objectName); if(gs !=
> null) { gs.setNonStrokingAlphaConstant(1f);
> gs.setStrokingAlphaConstant(1f); }*
... Unfortunately, it doesn't seem to have the same effect as the
brute-force approach of "hard-coded them to always set/return '1' in
PDGraphicsState". Do you have any suspicions as to why?
This is reproducible using the following steps:
1. Windows 11, Java 11
2. PDF from original email in this thread
3. XPS Document Writer, DPI set to 300
4. Custom form size: 4x6
P.S. This rasterization seems specific to Windows.
- [email protected]
On Thu, May 18, 2023 at 1:30 AM Tilman Hausherr <[email protected]>
wrote:
> Hi,
>
> I looked again and I see my advice was wrong, the protected method I
> looked at is final, and the other one is private.
>
> The next thing that you could try is to create your own
> SetGraphicsStateParameters class, and call addOperator(new
> SetGraphicsStateParameters()); in your own drawer.
>
> The new class should be like the old class but with this modification
>
> PDExtendedGraphicsState gs =
> context.getResources().getExtGState(graphicsName); // existing line
> gs.setNonStrokingAlphaConstant(1f);
> gs.setStrokingAlphaConstant(1f);
>
>
> Tilman
>
> On 17.05.2023 22:28, Tres Finocchiaro wrote:
> >
> > What you could try is to extend *getNonStrokingPaint* and
> > *getStrokingPaint*
> > and set both values to 1 (that is the default if no ca/CA entry
> > exists)
> > with *setAlphaConstant*() and *setNonStrokeAlphaConstant*().
> >
> >
> > Thanks. Do you mind offering a pointer on how to perform this? For
> > example, *getNonStrokingPaint*() and *getStrokingPaint*() return Paint
> > objects. Should I be forcing *setAlphaConstant*() and
> > *setNonStrokeAlphaConstant*() like this code example?
> >
> >
> https://github.com/apache/pdfbox/blob/f7ac68e7b367a43e36e74e1ec915c25b117304cb/pdfbox/src/main/java/org/apache/pdfbox/contentstream/PDFStreamEngine.java#L237-L238
> >
> > As a quick test, I hard-coded them to always set/return "1" in
> > *PDGraphicsState * and it appears to fix the rasterization of the
> > second page, but I'd like to be able to make this toggleable.
> >
> > Here's my current code:
> >
> https://github.com/qzind/tray/pull/1108/files#diff-aba44d09ef8de16a001d790ae7671bea33941071306f549b8dc290504e3e1d1b,
>
> > which is largely based on a conversation here:
> >
> https://issues.apache.org/jira/browse/PDFBOX-4123?focusedCommentId=17529733&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17529733
> > <
> https://issues.apache.org/jira/browse/PDFBOX-4123?focusedCommentId=17529733&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17529733
> >.
> >
> > image.png
> >
> > - [email protected]
>
>
