[OpenJDK 2D-Dev] [9] RFR: JDK-8066139, , Null return from PrintJob.getGraphics() running closed/java/awt/PrintJob/HighResTest/HighResTest.java

Phil Race philip.race at oracle.com
Fri Feb 19 20:25:52 UTC 2016

I am having trouble building JDK 9 at the moment so i applied 8061267 to 
and was able to reproduce the regression and have a couple of observations

- I am now seeing the NPE after the first page as you did .. puzzling.
- I next applied your fix but still see the NPE !

It appears that all your fix did is stop the "PD_PAGENUMS"  flag being 
set. If I manually select it, (ie select that "Pages" radio button) then 
press print,
then voila, the NPE is back!


On 02/19/2016 10:53 AM, Phil Race wrote:
> I am not sure I can be correctly understanding the fix as the 
> ramification seems
> to be that if the users wants to print only Page 3 of a 10 page 
> document and so sets
> from page=3 and to page=3, that this request will be ignored and all 
> pages will
> be printed .. can you test such a scenario.
> Additionally, have you tried running the original test case provided 
> with 8061267
> against your fix ?
> Also when I ran the HighResTest on a current build I saw a null 
> graphics on
> the very first call to getGraphics() which is different than what I 
> interpret
> you as saying - you see the null *after* the first page is printed.
> -phil.
> On 02/19/2016 01:18 AM, prasanta sadhukhan wrote:
>> Hi Phil, All,
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8066139
>> webrev: http://cr.openjdk.java.net/~psadhukhan/8066139/webrev.00/
>> It was seen after fix of JDK-8061267 
>> <https://bugs.openjdk.java.net/browse/JDK-8061267>: PrinterJob: 
>> Specified Page Ranges not displayed in Windows Native Print Dialog
>> the closed/java/awt/PrintJob/HighResTest/HighResTest.java was failing 
>> with NPE when PrinterJob.getGraphics() is called the 2nd time before 
>> calling PrinterJob.end().
>> The above fix caused this regression because it sets the PD_PAGENUMS 
>> flag for windows PrintDlg struct which causes *Pages* radio button to 
>> be selected in print dialog.
>> However, fromPage and toPage was both set to 1 so after the 1st page 
>> is printed, RasterPrinterJob.print(attributes) finishes and 
>> graphicsToBeDrawn.closeWhenEmpty() gets called
>> http://hg.openjdk.java.net/jdk9/client/jdk/file/d8def65c6c00/src/java.desktop/share/classes/sun/print/PrintJob2D.java#l1006
>> which sets the queue to null so when PrinterJob2D#getGraphics() calls 
>> graphicsToBeDrawn.pop() it sees queue to be null and sets graphics 
>> object to be null so
>> PrinterJob.getGraphics() gets null and g.drawLine in testcase causes 
>> NPE since g is null.
>> Fix was done to set the PD_PAGENUMS flag only when toPage is more 
>> than fromPage in which case, "All" will be selected in printer dialog 
>> and RasterPrinterJob.print() will finish only after printing all the 
>> pages.
>> Regards
>> Prasanta

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