path: root/DOCS
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authorNiklas Haas <>2017-07-06 11:27:24 +0200
committerNiklas Haas <>2017-07-06 11:30:33 +0200
commitaa2bdec26cf2544cffa4b2613086f226127e2ea8 (patch)
tree30b981bef8c110d31aad02155ebb0205a87e9432 /DOCS
parentef43854b3439907fa8bf77e25d450f3c71395218 (diff)
vo_opengl: also expose NAME_mul for user shaders
This is exposed so that bjin/mpv-prescalers can use textureGatherOffset for performance. Since there are now quite a lot of parameters where it isn't quite clear why they're all defined, add a paragraph to the man page that explains them a bit.
Diffstat (limited to 'DOCS')
1 files changed, 8 insertions, 0 deletions
diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst
index 7e6199b5e3..2e48c51ffa 100644
--- a/DOCS/man/options.rst
+++ b/DOCS/man/options.rst
@@ -4274,10 +4274,18 @@ The following video options are currently all specific to ``--vo=opengl`` and
to texture coordinates)
vec2 NAME_pt
The (unrotated) size of a single pixel, range [0,1].
+ float NAME_mul
+ The coefficient that needs to be multiplied into the texture contents
+ in order to normalize it to the range [0,1].
sampler NAME_raw
The raw bound texture itself. The use of this should be avoided unless
absolutely necessary.
+ Normally, users should use either NAME_tex or NAME_texOff to read from the
+ texture. For some shaders however , it can be better for performance to do
+ custom sampling from NAME_raw, in which case care needs to be taken to
+ respect NAME_mul and NAME_rot.
In addition to these parameters, the following uniforms are also globally