Bug 40907 – [PNG decoder] direct access to jmpbuf is deprecated in libpng >= 1.4.0beta103

• Component: Images
• Status: RESOLVED FIXED

[Philippe Normand]

Extract from libpng/CHANGES:


 Make the 'png_jmpbuf' macro expand to a call that records the correct
    longjmp function as well as returning a pointer to the setjmp
    jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
    (John Bowler)

So the PNGImageDecoder should use png_jmpbuf(m_png) instead of m_png->jmpbuf if libpng >= 1.4 is used.

[Philippe Normand]

Created attachment 59237 [details]
proposed patch

[Xan Lopez]

Comment on attachment 59237 [details]
proposed patch

Looks good to me.

[WebKit Commit Bot]

Comment on attachment 59237 [details]
proposed patch

Rejecting patch 59237 from commit-queue.

Failed to run "[u'/Users/eseidel/Projects/CommitQueue/WebKitTools/Scripts/svn-apply', u'--reviewer', u'Xan Lopez', u'--force']" exit_code: 1
Parsed 2 diffs from patch file(s).
patching file WebCore/ChangeLog
Hunk #1 succeeded at 1 with fuzz 3.
patching file WebCore/platform/image-decoders/png/PNGImageDecoder.cpp
Hunk #3 FAILED at 131.
Hunk #4 FAILED at 219.
Hunk #5 succeeded at 303 (offset 14 lines).
2 out of 5 hunks FAILED -- saving rejects to file WebCore/platform/image-decoders/png/PNGImageDecoder.cpp.rej
patch unexpectedly ends in middle of line

Full output: http://webkit-commit-queue.appspot.com/results/3339000

[Philippe Normand]

Manually landed a rebased patch as http://trac.webkit.org/changeset/62114
Sorry for the noise Eric

[noel gordon]

Question: would the following work for you?

#ifndef png_jmpbuf
#define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
#endif