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: Response to comments 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 - Use custom configuration file pnglibconf.h, which turns off all features that

13 called mozpngconf.h, which was copied from Mozilla and modified by Apple (hence	12 are not in use.

14 the wk_* names):	13 - Use custom prefix file pngprefix.h, which avoids namespace conflicts with

15 - Unset PNG_NO_READ_PACK on Android in pngusr.h, required by freetype to support	14 pdfium's copy of libpng.

16 color glyphs.	15 - Configures custom png chunk user limits (crbug.com/117369) in pnglibconf.h.

17 - Configure PNG chunk user limits (crbug.com/117369)	16 - Fix for potential memory leak from upstream:

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

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

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

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

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

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