Grigori Goronzy [Sat, 9 Apr 2011 19:48:08 +0000 (21:48 +0200)]
Improved "last resort" charmap matching
After font reselection, loop through all charmaps if no glyph can't be
found until we hopefully find one that works. If we get here at all, the
font is seriously broken, so this is unlikely to harm anything.
This improves the last resort charmap fallback introduced in 96057d.
Grigori Goronzy [Sat, 9 Apr 2011 02:06:39 +0000 (04:06 +0200)]
Much improved "Default" style
Make the "Default" style, useful as a fallback and required by few
scripts for proper rendering, actually do something sensible. Font,
sizes, et cetera are set up mostly like VSFilter.
Grigori Goronzy [Wed, 16 Feb 2011 19:31:15 +0000 (20:31 +0100)]
Fix fontconfig disabled at runtime
MPlayer is able to use this configuration with the -nofontconfig flag;
this fixes crashes in case no font is available. Fixes a crash at uninit
as well.
Grigori Goronzy [Wed, 16 Feb 2011 18:58:15 +0000 (19:58 +0100)]
test: fix compilation with libpng 1.5, rename configure switch
libpng 1.5 renamed the jmpbuf variable to jmp_buf. Since direct access
to this variable is deprecated, it makes more sense to use the function
png_jmpbuf() instead.
Also, rename the --enable-png switch to --enable-test to make clear this
is a debugging option.
Initial patch by Alexis Ballier, aballier AT gentoo DOT org.
Grigori Goronzy [Wed, 16 Feb 2011 18:39:54 +0000 (19:39 +0100)]
Require fontconfig by default
Enable configure to require fontconfig by default; libass is quite
useless for most purposes without it anyway. If you want to build
without fontconfig, explicitly disable it with --disable-fontconfig.
Grigori Goronzy [Wed, 9 Feb 2011 00:27:22 +0000 (01:27 +0100)]
Simplify word wrapping and fix possible endless loop
wrap_lines_smart() got stuck if there was a long line without spaces
followed by a hard linebreak. When the loop got to the '\n' character
the hard linebreak was not handled because the line was already over
wrap length and soft linebreak handling had precedence. Then at the
end of the loop body the code noted that the hard linebreak hadn't yet
been handled, and the same glyph needed to be reprocessed for that.
However, the soft linebreak code hadn't actually done anything because
there was no space to break at, and thus the loop repeated from the
exact same state forever.
Handle this by removing the check for an additional hard linebreak
after a soft linebreak, which stepped back by one char. This is a
very marginal case and shouldn't really matter in practice.
Grigori Goronzy [Tue, 28 Sep 2010 14:10:31 +0000 (16:10 +0200)]
Relicense to ISC
In hope to make libass as useful as possible, relicense libass to ISC, a
simplified 2-clause BSD license. All contributors who provided
non-trivial changes have granted their permission for this.
Grigori Goronzy [Thu, 12 Aug 2010 20:15:10 +0000 (22:15 +0200)]
Add support for \fs+ and \fs- syntax
These forms can be used to add or subtract a value from the
current font size instead of setting a new font size. Animations
are supported, but not recommended, as they won't be fluid due to
grid-fitting/hinting.
Grigori Goronzy [Thu, 12 Aug 2010 19:47:24 +0000 (21:47 +0200)]
Only word wrap on spaces
It looks like VSFilter only ever wraps on spaces, even if the line
length is going to overflow. We should do that as well.
Fixes a pretty confusing problem with scrolling vertical text.
Grigori Goronzy [Mon, 9 Aug 2010 00:55:30 +0000 (02:55 +0200)]
Fix drawing leakage: delay glyph allocation
Delay allocation of the "faux" glyph until a drawing is parsed.
This helps with fixing a (pretty bad) memory leak and also reduces frame
overhead a little.
Grigori Goronzy [Sun, 1 Aug 2010 21:52:30 +0000 (23:52 +0200)]
Fall back to first charmap as last resort
If we're already after the font reselection stage and a glyph cannot be
found in a font, try again with the first charmap as a last resort.
This is needed for old "symbol" fonts, for example.
Grigori Goronzy [Sun, 1 Aug 2010 01:30:59 +0000 (03:30 +0200)]
Limit (bitmap) glyph cache size
Now that bitmap glyphs (for vector clip masks) are stored in the glyph
cache, make sure it cannot grow indefinitely easily. Similar to the
bitmap cache, track approximate size of the cached elements and reset
if the cache exceeds a certain limit.
Also, reduce default bitmap cache size to 30 MB as we have essentially
two bitmap caches now. That's still plenty in all use cases where
caching matters.
Grigori Goronzy [Thu, 29 Jul 2010 00:38:29 +0000 (02:38 +0200)]
Fix drawing cbox calculation
Use extremes of all points fed to the parser, instead of only points
that are added to the outline.
Fixes a rendering problem reported on IRC and should fix Issue #7.
Grigori Goronzy [Thu, 22 Jul 2010 17:02:12 +0000 (19:02 +0200)]
Better PAR correction
PAR correction so far merely applied a horizontal scaling factor to
glyphs right after loading. This screws up transformed text,
unfortunately.
It's a much better approach to typeset text without correction and scale
everything at the very end. In MPlayer, an EOSD rendering now looks
exactly the same as a video filter rendering (except for more sharpness
in the EOSD case).
Grigori Goronzy [Sat, 26 Jun 2010 23:25:56 +0000 (01:25 +0200)]
Reduce number of glyph copies
Do not copy glyphs when it isn't really needed.
Profiling with valgrind's callgrind showed that FT_Glyph_Copy takes a
big fraction of the rendering time (~40%) for "simple styled softsubs"
cases. It turned out that glyphs are duplicated much more often than
is necessary. Reducing the number of copies cuts down the rendering
time for the "simple styled softsubs" case by about 70%!
Grigori Goronzy [Sat, 26 Jun 2010 03:15:18 +0000 (05:15 +0200)]
Add fixups for various font defects
Reverse "outside" contours with wrong winding correction, require
that a contour is "inside" for considering its removal; Move this
hack into ass_font.c, where it belongs.
Grigori Goronzy [Sat, 26 Jun 2010 00:17:03 +0000 (02:17 +0200)]
Improve fullname matching
Only match outline fonts and take slant and weight into consideration.
This matches all font faces which have at least the slant/weight that is
requested. This fixes issue 23; however, corner cases can be constructed
in which wrong fonts will be matched, if multiple slant/weight variants
of the same font exist, but that is very unlikely in practice.
Grigori Goronzy [Sun, 30 May 2010 23:38:11 +0000 (01:38 +0200)]
Add API function to flush all events
Add a function to flush all events in a track and increment
LIBASS_VERSION to indicate the addition.
Initial patch by Aurelien Jacobs (aurel AT gnuage DOT org).
Grigori Goronzy [Sat, 17 Apr 2010 23:28:25 +0000 (01:28 +0200)]
Use first Windows charmap as fallback
Extend the charmap selection heuristics to select the first Windows
charmap if no Unicode charmap is found.
Fixes one particular font, FGP楷書体NT-M, and possibly others.
Grigori Goronzy [Sat, 17 Apr 2010 20:59:47 +0000 (22:59 +0200)]
Support multiple faces per attachment correctly
Store the real font face id instead of using 0 all the time and use the
real font face id for font lookup as well. This makes font attachments
with multiple faces work correctly.
Grigori Goronzy [Thu, 18 Feb 2010 04:27:16 +0000 (05:27 +0100)]
Basic @font support
Do not skip '@' at the start of a font name in styles; detect '@' at
font name start and set a new attribute in ASS_Font accordingly.
Rotate affected glyphs after loading and calculate a suitable advance.
Grigori Goronzy [Sat, 10 Apr 2010 02:02:36 +0000 (04:02 +0200)]
Ignore global advance width unconditionally
Some (arguably) broken CJK fonts claim to have a fixed advance width,
but they actually use two different widths for half-width and full-width
characters. Even worse, some use proportional width.
This can cause problems under certain circumstances. A big project
(Cairo) uses a FreeType load flag to ignore the global advance width
for such fonts, so I assume it can be used safely. Let's do it just
like them.
Grigori Goronzy [Wed, 10 Feb 2010 22:51:11 +0000 (23:51 +0100)]
fontconfig: consider fullname for matching fonts
Additionally match fonts via the fullname (or name for humans) and
prefer these matches. Previously, libass matched against the family name
only and this name can be completely different from the fullname (which
is used by VSFilter!).
Grigori Goronzy [Thu, 21 Jan 2010 05:31:45 +0000 (06:31 +0100)]
Skip border generation if glyph is collapsed
If a character is completely collapsed in x or y direction (\fscx0,
\fscy0), the rasterizer will not generate any visible pixels. This also
means vsfilter will never draw any border in this case, since it works
on the pixel data. FreeType's stroker OTOH happily draws a border around
a character, no matter how collapsed it is. Emulate vsfilter's behavior
by skipping border generation if the glyph is collapsed.
Grigori Goronzy [Mon, 18 Jan 2010 23:42:22 +0000 (00:42 +0100)]
Up size limit for script files
Change size limit from 10MB to 50MB and clean up code a bit. A limit
still might be handy if one selects a very big file for subtitles by
accident. 50MB should be enough for even the biggest karaoke files.
Grigori Goronzy [Wed, 6 Jan 2010 22:51:01 +0000 (23:51 +0100)]
Improve rotation cache accuracy
In some cases 16.16 precision is not good enough. Instead use 10.22 and
use modulo 360.0 on the angles to make overflows impossible and improve
cache hit ratio sometimes.