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1 files changed, 13 insertions, 1 deletions
diff --git a/DOCS/man/vo.rst b/DOCS/man/vo.rst
index c296e705be..0566fd6817 100644
--- a/DOCS/man/vo.rst
+++ b/DOCS/man/vo.rst
@@ -457,6 +457,18 @@ Available video output drivers are:
This is automatically disabled for anamorphic video, because this
feature doesn't work correctly with this.
+ ``sigmoid-upscaling``
+ When upscaling in linear light, use a sigmoidal color transform
+ to avoid emphasizing ringing artifacts.
+
+ ``sigmoid-center``
+ The center of the sigmoid curve used for ``sigmoid-upscaling``, must
+ be a float between 0.0 and 1.0. Defaults to 0.75 if not specified.
+
+ ``sigmoid-slope``
+ The slope of the sigmoid curve used for ``sigmoid-upscaling``, must
+ be a float between 1.0 and 20.0. Defaults to 6.5 if not specified.
+
``no-npot``
Force use of power-of-2 texture sizes. For debugging only.
Borders will be distorted due to filtering.
@@ -598,7 +610,7 @@ Available video output drivers are:
This is equivalent to::
- --vo=opengl:lscale=spline36:dither-depth=auto:fbo-format=rgba16:fancy-downscaling
+ --vo=opengl:lscale=spline36:dither-depth=auto:fbo-format=rgba16:fancy-downscaling:sigmoid-upscaling
Note that some cheaper LCDs do dithering that gravely interferes with
``opengl``'s dithering. Disabling dithering with ``dither-depth=no`` helps.