+libass (unreleased)
+ * Treat invalid nested \t tags like VSFilter
+ * Fix stack overflow on deeply nested \t tags
+
+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.
+
+libass (0.13.7)
+ * 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
+
+libass (0.13.6)
+ * Bump ABI version to account for the new Justify field in ASS_Style
+ that was added in 0.13.5.
+
+libass (0.13.5)
+ * Add Justify style override that changes text justification
+ (left/right/center) without affecting event positioning.
+ * Fix ass_set_cache_limits() to affect total bitmap cache size
+ including composite bitmap cache.
+ * Number parsing fixes
+ * Fix illegal read when parsing some numbers in scientific notation
+ with huge exponents.
+ * Correctly evaluate numbers in scientific notation with large exponents.
+ * Correctly evaluate numbers with many leading zeros.
+ * Bug fixes found with fuzzing
+ * Fix a small memory leak in the parser.
+ * Fix illegal read in the parser on specially crafted input with \t tags.
+
+libass (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)
+
+libass (0.13.3)
+ * 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.
+
+libass (0.13.2)
+ * 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 CoreText under specific circumstances
+
+libass (0.13.1)
+ * 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 (GH #200)
+ * Fix static linking against libass through pkg-config when libass
+ uses libiconv
+ * Fix some small memory leaks, potential crashes and bad data uses
+
+libass (0.13.0)
+ * Add native font selection backends for OSX (CoreText) and Windows
+ (DirectWrite). You can now run libass without fontconfig on these
+ platforms. This fixes problems with fontconfig behaving badly on
+ these platforms (it could take minutes to scan all system fonts).
+ Even on Linux, this speeds up loading of embedded fonts (such as
+ provided by ass_add_font()).
+ The DirectWrite backend only works on Windows Vista and later. On
+ XP, fontconfig is still needed. libass can be compiled with both
+ DirectWrite and fontconfig, and then it will fallback to fontconfig
+ automatically if DirectWrite is not available at runtime.
+ * Add ass_get_available_font_providers() API function.
+ * Change the 4th parameter of ass_set_fonts(). This now selects the
+ font provider. This is somewhat backwards compatible with the old
+ behavior, but if you ever passed values other than 0 or 1, your
+ application might break with this libass release.
+ * The ass_fonts_update() function now does nothing. It's kept for
+ backward compatibility only.
+ * Much faster gaussian blur. This can bring a large speedup with big
+ blurred signs and such.
+ * Drop ENCA support
+ * Bug fixes
+ * Fix compilation of the freetype rasterizer (disabled by default)
+ * Fix rendering with some cases of consecutive line breaks (\N\N).
+ * Fix some memory allocation failure checks
+ * Avoid system locale dependent behavior by reinventing some standard
+ C functions
+ * Fix rendering errors with strikes (GH #193)
+ * MSVC compilation fixes
+
+libass (0.12.3)
+ * VSFilter blur compatibility changes
+ * VSFilter color/alpha parsing compatibility changes
+ * Bugfixes
+ * Fix some potential memory leaks and crashes
+ * Fix large timestamps (larger than about 600 hours)
+ * Fix a potential crash with the new rasterizer and complex fonts
+ * Do not apply user-configured line position to non-dialog events
+ * Strictly clip non-dialog events to the video rectangle
+
libass (0.12.2)
* Add extern "C" guards to the public headers for C++ compatibility
* Improvements to style override API and implementation