[cairo-bugs] [Bug 63487] New: Fix read_png with libpng 1.6

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63487

          Priority: medium
            Bug ID: 63487
          Assignee: cworth at cworth.org
           Summary: Fix read_png with libpng 1.6
        QA Contact: cairo-bugs at cairographics.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: krejzi at email.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 1.12.14
         Component: png functions
           Product: cairo

Created attachment 77910
  --> https://bugs.freedesktop.org/attachment.cgi?id=77910&action=edit
Fix read_png with libpng 1.6

With libpng 1.6, png_read_update_info() needs to be called after
transformations.

http://libpng.git.sourceforge.net/git/gitweb.cgi?p=libpng/libpng;a=blob;f=libpng-manual.txt;hb=HEAD#l4983

The attached patch fixes it on my side.

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