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This adds 2 new API functions:
ass_set_selective_style_override()
ass_set_selective_style_override_enabled()
They can be used to force dialog text to use a specific ASS_Style. It
uses a fuzzy heuristic for that, and the quality of results may vary.
It does style overriding selectively and tries not to override things
that need explicit styling. The heuristic for that isn't set in stone
either, and can change with future libass versions.
Closes libass#88.
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Patch by chadr...@gmail.com.
Fixes libass#58, GC#117.
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ass_set_aspect_ratio() is confusing, because it takes a DAR and SAR
value, while libass just needs a single pixel aspect ratio. Introduce
ass_set_pixel_aspect(), which sets the pixel aspect ratio directly.
ass_set_aspect_ratio() is considered deprecated. There's no reason to
remove it, but hopefully directing users to ass_set_pixel_aspect() will
make for a simpler API.
Improve the doxygen and document what ass_set_margins() actually does.
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\blur radius is not scaled from script to storage resolution
but is scaled from storage to display resolution. The same
applies to borders and shadows if ScaledBorderAndShadow is "no".
(If it is "yes", borders and shadows are scaled from script
to display resolution just like before.)
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This allows users to change the vertical position of normal subtitles.
MPlayer has such a feature as -sub-pos option using its internal
subtitle renderer.
Bump LIBASS_VERSION to indicate the API addition.
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Add an API call, ass_set_shaper, and infrastructure to make shapers
selectable at runtime. Currently, this allows to switch between two
shapers: a SIMPLE shaper that maps to FriBidi and a COMPLEX shaper that
maps to HarfBuzz.
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Fix for previous commit.
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libass' cache was basically unmanaged; it would grow without any limits,
depending on how complex the subtitles are. Introduce a simple limiting
that resets the cache if certain limits are exceeded. The bitmap cache
is limited to approx. 50 MB size by default, while the glyph cache
allows storing up to 1000 glyphs by default. A few tests with rather
heavily softsubbed fansubs show that these limits are fine.
The API was extended with the function ass_set_cache_limits which allows
modification of these limits.
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Add an argument to ass_set_fonts for controlling whether the fontconfig
font cache should be built/updated. Add a new function ass_fonts_update
to make it possible to update fonts later on.
Additionally, stop using FcConfigSetDefault for thread safety.
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Introduce functionality for providing a message callback that is used
for passing messages to the controlling application instead of simply
printing them to standard output. The function pointer to the callback
is stored in the ass_library_t instance. ass_msg needs access to it, so
in many places the library instance needs to be passed around now.
The default behavior is the old one: messages of MSGL_INFO or lower
are printed to the standard output, prefixed with "[ass]".
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Rename process_force_style to ass_process_force_style and make it
available in the DSO.
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Only export those symbols into the shared object which are defined in
the API (ass.h). A file libass.sym which contains a list of symbols
was added and libtool configured to use it.
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