Henry Iguaro created PDFBOX-5471:
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Summary: NPE when Transparency Group is missing the BBox
Key: PDFBOX-5471
URL: https://issues.apache.org/jira/browse/PDFBOX-5471
Project: PDFBox
Issue Type: Bug
Components: Rendering
Affects Versions: 2.0.26
Reporter: Henry Iguaro
Attachments: getbbox-null.pdf, image-2022-07-04-14-55-28-527.png
Some files contain transparency groups with no {{{}BBox{}}}. When this happens,
PDFBox rendering code throws a {{NullPointerException}} in the
{{TransparencyGroup}} constructor:
{code:java}
// transform the bbox
GeneralPath transformedBox = form.getBBox().transform(transform);
\_______/
NPE when its null{code}
The following is a screenshot taken from {{pdf-debugger}} when trying to open a
file with has this issue:
!image-2022-07-04-14-55-28-527.png!
The stack trace:
{code:java}
java.lang.RuntimeException: java.util.concurrent.ExecutionException:
java.lang.NullPointerException: Cannot invoke
"org.apache.pdfbox.pdmodel.common.PDRectangle.transform(org.apache.pdfbox.util.Matrix)"
because the return value of
"org.apache.pdfbox.pdmodel.graphics.form.PDTransparencyGroup.getBBox()" is null
org.apache.pdfbox.debugger.pagepane.PagePane$RenderWorker.done(PagePane.java:485)
java.desktop/sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
Caused by: java.util.concurrent.ExecutionException:
java.lang.NullPointerException: Cannot invoke
"org.apache.pdfbox.pdmodel.common.PDRectangle.transform(org.apache.pdfbox.util.Matrix)"
because the return value of
"org.apache.pdfbox.pdmodel.graphics.form.PDTransparencyGroup.getBBox()" is null
org.apache.pdfbox.debugger.pagepane.PagePane$RenderWorker.done(PagePane.java:465)
java.desktop/sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
Caused by: java.lang.NullPointerException: Cannot invoke
"org.apache.pdfbox.pdmodel.common.PDRectangle.transform(org.apache.pdfbox.util.Matrix)"
because the return value of
"org.apache.pdfbox.pdmodel.graphics.form.PDTransparencyGroup.getBBox()" is null
org.apache.pdfbox.rendering.PageDrawer$TransparencyGroup.<init>(PageDrawer.java:1672)
org.apache.pdfbox.rendering.PageDrawer$TransparencyGroup.<init>(PageDrawer.java:1637)
org.apache.pdfbox.rendering.PageDrawer.showTransparencyGroupOnGraphics(PageDrawer.java:1575)
org.apache.pdfbox.rendering.PageDrawer.showTransparencyGroup(PageDrawer.java:1553)
org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:81)
org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:966)
org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:541)
org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:516)
org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:155)
org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:279)
org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:355)
org.apache.pdfbox.debugger.pagepane.PagePane$RenderWorker.doInBackground(PagePane.java:453)
org.apache.pdfbox.debugger.pagepane.PagePane$RenderWorker.doInBackground(PagePane.java:435)
java.base/java.lang.Thread.run(Thread.java:832)
{code}
The following is an example file that reproduces this problem:
[^getbbox-null.pdf]
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