[PDFBOX-1475] Exception thrown during rendering page if /DecodeParms specified indirectly (like [9 0 R]) in XObject/Image

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.0, 1.7.1
• Fix Version/s: 1.8.0
• Component/s: PDModel
• Labels: DecodeParms Image XObject
• Environment: Not important
• Assignee: Andreas Lehmkühler
• Reporter: Armin Le Grand
• Created: 20/Dec/12 13:28
• Updated: 23/Mar/13 12:56
• Resolved: 26/Dec/12 14:28

Description

PROBLEM:
Exception is thrown during rendering TC11.pdf. Empty image is generated.

TEST:
java -jar pdfbox-app-1.7.1.jar PDFToImage -resolution 300 TC11.pdf

DETAILS:
There are 2 objects in TC11.pdf.
. . .
Object 7:
<<

/Type /XObject
/Subtype /Image
/Width 2496
/Height 3504
/BitsPerComponent 1
/ColorSpace /DeviceGray
/Filter [/CCITTFaxDecode]
/DecodeParms [9 0 R]
/Length 10 0 R
>>
. . .
Object 9:
<<

/Columns 2496
/Rows 3504
/K -1
/BlackIs1 false
>>
. . .

when rendering the page exception is thrown as the library doesn't resolve indirect reference to object 9 for /DecodeParms.

RESOLUTION:
I can specify what is to be changed in CCITTFaxDecoderFilter.java and PDCcitt.java to resolve the issue.