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Diffstat (limited to 'libpng-manual.txt')
| -rw-r--r-- | libpng-manual.txt | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/libpng-manual.txt b/libpng-manual.txt index 1163cb075..b6942f4fb 100644 --- a/libpng-manual.txt +++ b/libpng-manual.txt @@ -1,6 +1,6 @@ libpng-manual.txt - A description on how to use and modify libpng - libpng version 1.5.10beta01 - February 21, 2012 + libpng version 1.5.10beta03 - March 5, 2012 Updated and distributed by Glenn Randers-Pehrson <glennrp at users.sourceforge.net> Copyright (c) 1998-2011 Glenn Randers-Pehrson @@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng Based on: - libpng versions 0.97, January 1998, through 1.5.10beta01 - February 21, 2012 + libpng versions 0.97, January 1998, through 1.5.10beta03 - March 5, 2012 Updated and distributed by Glenn Randers-Pehrson Copyright (c) 1998-2011 Glenn Randers-Pehrson @@ -4142,6 +4142,15 @@ X. Changes to Libpng from version 1.4.x to 1.5.x From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the function) incorrectly returned a value of type png_uint_32. +Checking for invalid palette index on read or write was added at libpng +1.5.10. This is enabled by default but can be disabled in each png_ptr with + + png_set_check_for_invalid_index(png_ptr, allowed); + + allowed - one of + 0: disable + 1: enable + A. Changes that affect users of libpng There are no substantial API changes between the non-deprecated parts of @@ -4260,6 +4269,20 @@ PNG_USER_WIDTH_MAX and PNG_USER_HEIGHT_MAX, although this document said that it could be used to override them. Now this function will reduce or increase the limits. +Starting in libpng-1.5.10, the user limits can be set en masse with the +configuration option PNG_SAFE_LIMITS_SUPPORTED. If this option is enabled, +a set of "safe" limits is applied in pngpriv.h. These can be overridden by +application calls to png_set_user_limits(), png_set_user_chunk_cache_max(), +and/or png_set_user_malloc_max() that increase or decrease the limits. Also, +in libpng-1.5.10 the default width and height limits were increased +from 1,000,000 to 0x7ffffff (i.e., made unlimited). Therefore, the +limits are now + default safe + png_user_width_max 0x7fffffff 1,000,000 + png_user_height_max 0x7fffffff 1,000,000 + png_user_chunk_cache_max 0 (unlimited) 128 + png_user_chunk_malloc_max 0 (unlimited) 8,000,000 + B. Changes to the build and configuration of libpng Details of internal changes to the library code can be found in the CHANGES @@ -4573,13 +4596,13 @@ Other rules can be inferred by inspecting the libpng source. XIV. Y2K Compliance in libpng -February 21, 2012 +March 5, 2012 Since the PNG Development group is an ad-hoc body, we can't make an official declaration. This is your unofficial assurance that libpng from version 0.71 and -upward through 1.5.10beta01 are Y2K compliant. It is my belief that earlier +upward through 1.5.10beta03 are Y2K compliant. It is my belief that earlier versions were also Y2K compliant. Libpng only has three year fields. One is a 2-byte unsigned integer that |