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author | Niklas Haas <git@haasn.xyz> | 2017-06-09 09:16:06 +0200 |
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committer | Ricardo Constantino <wiiaboo@gmail.com> | 2017-06-09 11:27:28 +0100 |
commit | d8a3b10f45eb10fb34ce9da3a9a76e3bd8644e3d (patch) | |
tree | 80186e11d21707072751d95e055f44da7a36f159 /osdep | |
parent | 30cd963b25520089f56417eb2f946c98afeef073 (diff) | |
download | mpv-d8a3b10f45eb10fb34ce9da3a9a76e3bd8644e3d.tar.bz2 mpv-d8a3b10f45eb10fb34ce9da3a9a76e3bd8644e3d.tar.xz |
vo_opengl: add new HDR tone mapping algorithm
I call it `mobius` because apparently the form f(x) = (cx+a)/(dx+b) is
called a Möbius transform, which is the algorithm this is based on. In
the extremes it becomes `reinhard` (param=0.0 and `clip` (param=1.0),
smoothly transitioning between the two depending on the parameter.
This is a useful tone mapping algorithm since the tunable mobius
transform allows the user to decide the trade-off between color accuracy
and detail preservation on a continuous scale. The default of 0.3 is
already far more accurate than `reinhard` while also being reasonably
good at preserving highlights, without suffering from the overall
brightness drop and color distortion of `hable`.
For these reasons, make this the new default. Also expand and improve
the documentation for these tone mapping functions.
Diffstat (limited to 'osdep')
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