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Support passing bitmap subtitles to VOs in full RGBA color, and
implement this for libavcodec-decoded subtitle formats on decoding
side and vo_vdpau on display side. Currently this is enabled for PGS
(blu-ray) and DVB subtitles.
VDPAU seems to have sampling issues similar to known GL ones when
drawing a sub-rectangle from a larger texture with scaling, where
adjacent pixels outside the specified source rectangle affect the
result. As the bitmap subtitles may be scaled, add padding support to
the bitmap packer code.
In principle, this could be used for colored DVD subtitles too.
However, the libavcodec DVD decoder lacks parts of the resolution and
palette handling that are present in spudec.c.
Conflicts:
libvo/vo_gl.c
sub/dec_sub.h
sub/sd_lavc.c
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Split the vo_vdpau code that calculates how to pack all subtitle
bitmaps into a larger surface into a separate file. This will allow
using it in other VOs.
Conflicts:
Makefile
libvo/vo_vdpau.c
Note: this commit does the same as an earlier commit by me
(4010dd0b1a27e3996). My commit added the vo_vdpau packer code as
eosd_packer.c, while this commit by uau uses bitmap_packer.c. Since
bitmap_packer.c has a different interface, and because there are more
commits changing OSD rendering coming, I will pick uau's version.
However, vo_gl, vo_gl3 and vo_direct3d are still using eosd_packer.c,
so to make the transition easier, don't delete eosd_packer.c yet.
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