[XGC-99] PNGFile.getImageRawPNG() returns broken image data

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.0.1, 2.6
• Component/s: image codecs
• Assignee: Unassigned
• Reporter: Carsten Pfeiffer
• Created: 30/Jul/15 12:48
• Updated: 04/Aug/15 07:01

Description

The ImageRawPNG returned by PNGFile.getImageRawPNG() is broken because the provided InputStream (streamVec) contains only part of the raw image data. For a start the magic header is missing, but it's not enough to add it.

To fix this, I copied the entire stream in the PNGFile constructor like this:

        stream.mark(Integer.MAX_VALUE);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        IOUtils.copy(stream, out);
        rawStream = new ByteArrayInputStream(out.toByteArray());
        out = null;
        stream.reset();

and use the rawStream in favor of streamVec, which can be removed then.

Testcases still run successful. This fixes RTF output not working with PNG files in FOP because it checks for (missing) the PNG magic header.