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[libpng17] Changed user chunk callback API to respect global and per chunk

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defaults.  Previously a return of 0 from a user chunk callback would result in
the chunk being saved (if this was safe, even if the chunk was unsafe-to-copy);
this change respects the defaults set by the application, so unknown chunks
can be discarded by default and known-safe ones preserved.
This commit is contained in:
John Bowler
2013-03-02 21:39:44 -06:00
committed by Glenn Randers-Pehrson
parent 6152dbd424
commit ec89aefb44
6 changed files with 68 additions and 63 deletions
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11
ANNOUNCE
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@@ -1,5 +1,5 @@
Libpng 1.7.0beta05 - March 2, 2013
Libpng 1.7.0beta05 - March 3, 2013
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
@@ -193,10 +193,13 @@ Version 1.7.0beta04 [February 27, 2013]
Revised scripts/dfn.awk to work with the buggy MSYS awk that has trouble
with CRLF line endings.
Version 1.7.0beta05 [March 2, 2013]
Version 1.7.0beta05 [March 3, 2013]
Avoid a possible memory leak in contrib/gregbook/readpng.c
Fixed bug introduced in libpng-1.6.0beta28 that causes libpng to handle chunks
even when they have been tagged PNG_HANDLE_CHUNK_NEVER.
Changed user chunk callback API to respect global and per chunk defaults.
Previously a return of 0 from a user chunk callback would result in the
chunk being saved (if this was safe, even if the chunk was unsafe-to-copy);
this change respects the defaults set by the application, so unknown chunks
can be discarded by default and known-safe ones preserved.
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