libass (0.14.0)
* Brand new, faster and better outline stroker (replaces FreeType stroker)
* Remove option to use the FreeType rasterizer
* Fix spots of missing border around self-intersecting shapes
* Switch from Yasm to NASM for building hand-written assembler code
* Support Core Text font provider on Mac OS X 10.6 and 10.7
* Clear font cache in ass_set_fonts(). This fixes potentially incorrect
font choices and an occasional crash if this function is called midway
through rendering a file.
Fix invalid memory accesses with BorderStyle=4
Fix change detection bug on frame resizes
Fix cache bugs with border size
Reduce precision of border width in font outline caching
Don't treat :;<=>? as hexadecimal digits in color headers
Fix parsing of unusual Alignment values in ASS style definitions
Fix potential truncation in timestamp parsing
Treat negative PlayResX/PlayResY like VSFilter
Fixes to parsing of embedded fonts
Remove arbitrary bitmap limit (fixes issues with subtitle rendering at 4K)
Allow using shadow offset to adjust size of background with BorderStyle=4
Fix TrueType/OpenType font collection handling with the DirectWrite backend
changes from 0.13.1 to 0.13.4
Bug fixes found with fuzzing
Fix memory reallocation in the shaper. (CVE-2016-7972)
Fix two small memory leaks in the parser and test program.
Fix illegal read in Gaussian blur coefficient calculations. (CVE-2016-7970)
Fix mode 0/3 line wrapping equalization in specific cases which could result in illegal reads while laying out and shaping text. (CVE-2016-7969)
Improve compatibility/portablility of build system, should fix e.g. compilation on Solaris.
Fix memory leak in DirectWrite font provider.
Fix the rasterizer when rendering some large outlines.
Remove hack that forced RTL base direction depending on font encoding.
Greatly improve the internal caches with refcounting and gradual clearing.
Add ass_set_check_readorder() API function to disable use of the ReadOrder field for duplicate checking in ass_process_chunk().
ass_step_sub(track, now, 0) now finds the start of the subtitle at now.
Bug fixes:
Fix an issue with the new duplicate checking, which could lead to missing subtitles after seeking.
Fix a crash with Core Text under specific circumstances.
Much faster duplicate event check in ass_process_chunk. This can bring a large speedup for embedded subtitles with lots of events. To make this possible, it is now forbidden to combine calls to ass_process_chunk with any other method of manipulating the event list, namely, manual manipulation and calls to ass_process_data, ass_read_memory and ass_read_file.
Interpret negative timestamp components as actual negative numbers. This change increases compatibility with VSFilter.
Font matching changes for VSFilter compatibility
Look up fonts that contain PostScript outlines by their PostScript name instead of their full names. Family names continue to be used for all fonts.
Keep spaces in font names
Drop support for Fontconfig < 2.10.92 to ensure correct font matching
Bug fixes
Fix building the assembler code for the x32 ABI
Fix static linking against libass through pkg-config when libass uses libiconv
Fix some small memory leaks, potential crashes and bad data uses
Add extern "C" guards to the public headers for C++ compatibility
Improvements to style override API and implementation
Bugfixes:
* Fix some rasterizer bugs of unknown severity
* Fix a broken memset() of unknown severity
* Make timestamp parsing more lenient, which makes libass accept invalid files accepted by most other ASS parsers
* Increase compatibility with broken ASS drawings accepted by VSFilter
* Make ASS drawings with an extremely high number of control points work
This change increases compatibility with VSFilter.
* Bugfixes
* Fix a crash when using newer harfbuzz versions
* Load embedded memory fonts correctly
* Large shadow offsets rendered incorrectly
* Fix incorrect closing of last drawing contour
* Fix issues with undefined behavior in shifts
* Lots of of malloc() error checking
libass (0.11.1)
* Fix distfile generation
* No functional changes
libass (0.11.0)
* Add bitmap run combining/compositing
This changes the text rendering model and increases compatibility with
VSFilter. It may make rendering faster or slower in certain cases.
* Add AVX/SSE2 implementations for \be and compositing
This adds yasm as (optional) build dependency.
* Add ass_library_version() API funcion (GC #113)
* Add 'profile' program for benchmarks
* Improve gaussian blur
* Fix compilation with MSVC 2013
* Speed up HarfBuzz shaper
* Speed up cache
* Notable compatibility bugfixes
* Reset origin on \fay changes (GC #88)
* Tons of parser fixes
* Fix ascender/descender metrics (GH #8)
* Fix \pbo sign and scaling
* Don't reset wrap style on \r (GC #116, GH #45)
* Notable bugfixes:
* Correctly handle @font advance (GC #94)
* Disable ligatures for non-zero \fsp
* Make sure to release vector clip (GH #22)
libass (0.10.2)
* API additions and some ABI changes, bumped SONAME
* Expose header field for VSFilter color mangling (GC #87)
* Add functions for explicit scaling hints (GC #6)
* Add 'type' field to ASS_Image (GC #31)
* Workaround Freetype's font size grid-fitting where appropriate
* Apply blur to both glyph and border when using opaque box
* Parser bugfixes
* Parse angles in style as number
* Fix fallback event formats
* Make closing ')' optional for some tags
* Fix crazy VSFilter behaviour for \move (GC #90)
* Make \r fall back to line style (GC #104)
* Parse style name like VSFilter
* Ignore junk in nested \t tags
* Make \clip tag arguments mandatory
* Properly handle script and language in the HarfBuzz shaper
* Allow ASS_Track and ASS_Renderer to have different ASS_Library
* Fix stroking in some rare cases
* Correctly handle @font advance (GC #94)
* Fix ascent/descent for some fonts (GC #106)
* Fix ass_step_sub to not require sorted events
* Fix blur scaling
* Don't mutate input strings (GC #88)
* Remove/change some error messages
* Fix various small memory leaks
to address issues with NetBSD-6(and earlier)'s fontconfig not being
new enough for pango.
While doing that, also bump freetype2 dependency to current pkgsrc
version.
Suggested by tron in PR 47882
libass (0.10.1)
* Fix letter spacing
* Add \rSTYLENAME syntax support (GC #43)
* Fix border generation and border style reset (GC #56)
* Fix various issues with bug-for-bug compatibility of
transformations (\fax, \fay, etc.) to VSFilter (GC #46, GC #42)
* Fix drawing parsing (GC #47)
* Various fixes to shaper (GC #54, GC #55, GC#59)
* Fix change detection
* Add ass_set_line_position API to set a vertical subtitle offset
* Fix scaling of drawing baseline offset (\pbo) values
* Fix skipping of zero-width characters for FriBiDi shaper
* Use LTR text base direction by default, similar to VSFilter
libass (0.10.0)
* Bidirectional layout and Arabic shaping via FriBidi (GC #13)
* OpenType shaping via HarfBuzz-ng (GC #13)
* Add API for shaper configuration
* Add support for `Language' Script Info property, this can be used for
hinting the text language
* Vertical layout improvements
* Use `vert' and `vkna' OpenType features for vertical glyph variants
* Position rotated glyphs onto baseline
* Parse font encoding property for base text direction hinting
* Refactor cache system
* Use generic outlines in place of FreeType glyphs
* Direct outline bitmap rendering
* Fix whitespace trimming (GC #35)
* Do not render border if there's no shadow or glyph (GC #29)
* Adjust spacing after a italic to non-italic style change (GC #37)
* Fix fade timing
* Fix x positioning with borders (GC #27)
* Build system tweaks
libass is a portable subtitle renderer for the ASS/SSA (Advanced
Substation Alpha/Substation Alpha) subtitle format. It is mostly
compatible with VSFilter.
