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510 Commits

Author SHA1 Message Date
Cosmin Truta
ceb327789b Remove top-level const from function-scope variables 
As per the const correctness rules, top-level const-ness of data
in automatic scopes does not propagate outside of these scopes
(unlike const-ness at lower levels, such as pointers to const data).

Previously, const was used liberally, but inconsistently across the
libpng codebase. Using const wherever applicable is not incorrect.
However, _consistent_ use of const is difficult to maintain in such
conditions.

In conclusion, we shall continue to use const only where doing so is
strictly necessary:

1. If a function guarantees that it will not modify an argument
   passed by pointer, the corresponding function parameter should be
   a pointer-to-const (const T *).

2. Static data should not be modified, therefore it should be const.

Reference:
Google C++ Style Guide
https://google.github.io/styleguide/cppguide.html#Use_of_const
 2018-08-18 22:47:16 -04:00
Cosmin Truta
1ef8882814 Replace the remaining uses of PNG_CONST with const 
In v1.6.0, compiler support for const became a requirement.
It should be used consistently. To maintain backwards compatibility,
PNG_CONST is still maintained in deprecated form.
 2018-08-18 21:01:02 -04:00
Cosmin Truta
a873893279 Remove the "last changed" version information from source comments 
This information is maintained by the version control system.
 2018-07-28 18:47:21 -04:00
Cosmin Truta
46aedd8961 Release libpng version 1.6.35 2018-07-15 23:58:00 -04:00
Cosmin Truta
a74aa9a002 [libpng16] Replace the remaining uses of png_size_t with size_t 
In v1.6.0, size_t became a required type. It should be used
consistently. To maintain backwards compatibility, png_size_t
is still maintained in deprecated form.
 2018-06-17 22:37:44 -04:00
Glenn Randers-Pehrson
58720d3c06 [libpng16] Fix "last changed" dates 2017-08-29 12:29:03 -05:00
Glenn Randers-Pehrson
f6ca33d42c [libpng16] Bump version to 1.6.33beta01 2017-08-25 18:54:30 -05:00
Glenn Randers-Pehrson
df7e9dae0c [libpng16] Imported from libpng-1.6.32.tar 2017-08-24 16:39:02 -05:00
Glenn Randers-Pehrson
3524b0d201 [libpng16] Update "Last changed" dates and some copyright years 2017-07-31 17:03:17 -05:00
Glenn Randers-Pehrson
40afb68570 [libpng16] Added calls to png_handle_eXIf(() in pngread.c and png_write_eXIf() 
in pngwrite.c, and made various other fixes to png_write_eXIf().
Eliminated png_ptr->num_exif member from pngstruct.h and added num_exif
  to arguments for png_get_eXIf() and png_set_eXIf().
 2017-07-31 14:21:46 -05:00
Glenn Randers-Pehrson
68cb0aaee3 [libpng16] Implement eXIf chunk support 2017-07-13 11:22:48 -05:00
Glenn Randers-Pehrson
5aaf6e889c [libpng16] Imported from libpng-1.6.30beta04.tar 2017-06-06 19:38:17 -05:00
Glenn Randers-Pehrson
c548328904 [libpng16] Avoid writing an empty IDAT when the last IDAT exactly fills the 
compression buffer (bug report by Brian Baird).  This bug was introduced in
libpng-1.6.0.
 2017-06-06 18:40:45 -05:00
Glenn Randers-Pehrson
f604c74a5f [libpng16] Avoid conditional directives that break statements in pngrutil.c (Romero 
Malaquias)
 2017-01-20 14:46:21 -06:00
Romero B. de S. Malaquias
c3f4e5fb1a Avoiding conditional directives that break statements 2017-01-20 16:31:54 -03:00
Glenn Randers-Pehrson
0c440812db [libpng16] Imported from libpng-1.6.26.tar 2016-10-19 19:11:38 -05:00
Glenn Randers-Pehrson
565a751ca2 [libpng16] Quieted (bogus?) clang warnings about "absolute value has no effect". 2016-10-02 20:16:36 -05:00
Glenn Randers-Pehrson
761d833372 [libpng16] Quieted all remaining -Wconversion compiler warnings 2016-10-02 18:46:35 -05:00
Glenn Randers-Pehrson
ad3318ddc8 [libpng16] Bump version to 1.6.26beta03 2016-10-01 19:44:42 -05:00
Glenn Randers-Pehrson
1b363fa6b0 [libpng16] Quieted 116 (out of 288) -Wconversion compiler warnings by changing 
flag definitions in pngpriv.h from 0xnnnn to 0xnnnnU and trivial changes
in png.c, pngread.c, and pngwutil.c.
 2016-09-30 17:19:12 -05:00
Glenn Randers-Pehrson
217546ae43 [libpng16] Imported from libpng-1.6.26beta01.tar 2016-09-26 08:57:44 -05:00
Glenn Randers-Pehrson
b50d5cea2b [libpng16] Imported from libpng-1.6.24.tar 2016-08-03 21:32:26 -05:00
Glenn Randers-Pehrson
dd70604cec [libpng16] Fixed more indentation 2016-07-15 11:20:46 -05:00
Glenn Randers-Pehrson
5d7c7d5132 [libpng16] Fixed a harmless typo in pngwutil.c 2016-07-13 14:45:10 -05:00
Glenn Randers-Pehrson
f7d5419816 [libpng16] Avoid filter-selection heuristic sum calculations in cases where 
only one filter is a candidate for selection. This trades off code size (added
png_setup_*_row_only() functions) for speed.
 2016-07-08 10:09:25 -05:00
Glenn Randers-Pehrson
d9779744f9 [libpng16] Optimized absolute value calculation in filter selection, similar to 
code in the PAETH decoder in pngrutil.c. Build with PNG_USE_ABS to use this.
 2016-06-29 21:53:57 -05:00
Glenn Randers-Pehrson
3f2879bf60 [libpng16] Imported from libpng-1.6.24beta02.tar 2016-06-23 11:26:59 -05:00
Glenn Randers-Pehrson
4b4a9583b4 [libpng16] Imported from libpng-1.6.24beta02.tar 2016-06-23 11:08:06 -05:00
John Bowler
1df0ace0b4 Fix MSVC Level 2 warning 
MSVC doesn't like '-(unsigned)', so replace it by 0U-(unsigned) (in 1.6).

Signed-off-by: John Bowler <jbowler@acm.org>
 2016-06-22 17:35:49 -07:00
Glenn Randers-Pehrson
147dc568da [libpng16] Backed out previous optimization; the compiler should handle that. 2016-06-19 22:20:52 -05:00
Glenn Randers-Pehrson
29135161d7 [libpng16] Avoid filter-selection heuristic sum calculations in cases where 
only one filter is a candidate for selection. This trades off code size (added
png_setup_*_row_only() functions) for speed.
 2016-06-19 18:43:35 -05:00
John Bowler
9c04f57cab [libpng15] Corrected filter heuristic overflow handling. 2016-06-19 18:01:33 -05:00
Glenn Randers-Pehrson
ac43a87820 [libpng16] Imported from libpng-1.6.22.tar 2016-05-26 07:25:14 -05:00
Glenn Randers-Pehrson
1a3fa1e091 [libpng16] Imported from libpng-1.6.22beta03.tar 2016-03-09 12:04:40 -06:00
Glenn Randers-Pehrson
baf301d122 [libpng16] Restored "& 0xff" in png_save_uint_16() and png_save_uint_32() that 
were accidentally removed from libpng-1.6.17.
 2016-02-13 12:01:35 -06:00
Glenn Randers-Pehrson
5031c77d85 [libpng16] Bump version to 1.6.22beta01 2016-01-16 08:00:09 -06:00
Glenn Randers-Pehrson
fc0786a442 [libpng16] Imported from libpng-1.6.21.tar 2016-01-15 13:51:06 -06:00
Glenn Randers-Pehrson
66db757dd4 [libpng16] Happy 2016! Updated copyright year 2016-01-02 13:40:27 -06:00
Glenn Randers-Pehrson
975cbbb029 [libpng16] Moved png_check_keyword() from pngwutil.c to pngset.c 2015-12-13 15:04:18 -06:00
Glenn Randers-Pehrson
92ec30a3b1 [libpng16] Imported from libpng-1.6.20beta03.tar 2015-11-24 09:34:02 -06:00
Glenn Randers-Pehrson
415d26805a [libpng16] Imported from libpng-1.6.19.tar 2015-11-12 07:13:31 -06:00
Glenn Randers-Pehrson
a901eb3ce6 [libpng16] Prevent reading over-length PLTE chunk (Cosmin Truta). 2015-10-30 07:57:49 -05:00
Glenn Randers-Pehrson
81f44665cc [libpng16] Reject attempt to write over-length PLTE chunk 2015-10-29 09:26:41 -05:00
Glenn Randers-Pehrson
a8242fe6fb [libng16] Reverted recent mistaken change of 0xnnnn to 0xnnnnUL 2015-08-17 20:46:27 -05:00
Glenn Randers-Pehrson
d8b93c29a7 [libpng16] Appended more "UL" to hex constants. 2015-08-17 10:56:17 -05:00
Glenn Randers-Pehrson
8ba4b13c55 [libpng16] Changed 0xnnnn constants to 0xnnnnUL. 2015-08-16 22:49:58 -05:00
Glenn Randers-Pehrson
8b83ff3704 [libpng16] Change "n bit" to "n-bit" in comments. 2015-08-13 20:57:18 -05:00
Glenn Randers-Pehrson
e1b505cd1d [libpng16]Suppressed a warning from the Borland C++ 5.5.1/5.82 compiler 2015-07-29 07:42:19 -05:00
Glenn Randers-Pehrson
e6172809bd [libpng16] Imported from libpng-1.6.18.tar 2015-07-22 22:40:52 -05:00
John Bowler
7023d871e8 [libpng16] Fix g++ build breaks 2015-06-03 15:04:03 -05:00