third_party/libpng/README.chromium - Issue 2021403002: Update libpng to 1.6.22

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Issue 2021403002: Update libpng to 1.6.22 (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Rearrange pnglibconf.h Created 4 years, 6 months ago

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1 Name: libpng	1 Name: libpng

2 URL: http://libpng.org/	2 URL: http://libpng.org/

3 Version: 1.2.56	3 Version: 1.6.22

4 Security Critical: yes	4 Security Critical: yes

5 License: libpng license	5 License: libpng license

6 License Android Compatible: yes	6 License Android Compatible: yes

7	7

8 Description:	8 Description:

9 Updated to 1.2.56, no changes to the source files but all unneeded files	9 Updated to 1.6.22, stripped all unneeded files.

10 stripped.

11	10

12 Our custom configuration options are defined in pngusr.h. This was previously	11 - Turn on SSE optimizations for Intel platforms by running:

13 called mozpngconf.h, which was copied from Mozilla and modified by Apple (hence	12 "patch -i contrib/intel/intel_sse.patch -p1"

14 the wk_* names):	13 - Use custom configuration file pnglibconf.h, which turns off all features that

15 - Unset PNG_NO_READ_PACK on Android in pngusr.h, required by freetype to support	14 are not in use.

16 color glyphs.	15 - Use custom prefix file pngprefix.h, which avoids namespace conflicts with

17 - Configure PNG chunk user limits (crbug.com/117369)	16 pdfium's copy of libpng.

	17 - Configures custom png chunk user limits (crbug.com/117369) in pnglibconf.h.

	18 - Fix for potential memory leak from upstream:

	19 https://github.com/glennrp/libpng/commit/8d1672537324d99c6e65eb78fc1678cdd46f7 5bd

	20 https://github.com/glennrp/libpng/commit/6c7459e455a4f7d95c7700e9326bb12396e6e b1f

	21 - Fix for handling empty first IDAT chunk from upstream:

	22 https://github.com/glennrp/libpng/commit/3f46c67c6989f480bd932428aa1705f6625db abf

	23 https://github.com/glennrp/libpng/commit/81f0273d54aa9de663253b197b3c8228d659c c36

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