vo_opengl: make LOOKUP_TEXTURE_SIZE configurable

1 files changed, 9 insertions, 0 deletions

diff --git a/DOCS/man/vo.rst b/DOCS/man/vo.rst
index c8f484aa72..56339f1468 100644
--- a/DOCS/man/vo.rst
+++ b/DOCS/man/vo.rst
@@ -431,6 +431,15 @@ Available video output drivers are:
             Scale parameter (t). Increasing this makes the window wider.
             Defaults to 1.
 
+    ``scaler-lut-size=<4..10>``
+        Set the size of the lookup texture for scaler kernels (default: 8).
+        The actual size of the texture is ``2^N`` for an option value of ``N``.
+        So the lookup texture with the default setting uses 256 samples.
+
+        All weights are bilinearly interpolated from those samples, so
+        increasing the size of lookup table might improve the accuracy of
+        scaler.
+
     ``scaler-resizes-only``
         Disable the scaler if the video image is not resized. In that case,
         ``bilinear`` is used instead whatever is set with ``scale``. Bilinear