vo_gpu_next: add tunable shader parameters

This is a very simple but easy way of doing it. Ideally, it would be
nice if we could also add some sort of introspection about shader
parameters at runtime, ideally exposing the entire list of parameters as
a custom property dict. But that is a lot of effort for dubious gain.

It's worth noting that, as currently implemented, re-setting
`glsl-shader-opts` to a new value doesn't reset back previously mutated
values to their defaults.

1 files changed, 1 insertions, 0 deletions

diff --git a/video/out/gpu/video.h b/video/out/gpu/video.h
index 7637710fa7..30abd972f9 100644
--- a/video/out/gpu/video.h
+++ b/video/out/gpu/video.h
@@ -162,6 +162,7 @@ struct gl_video_opts {
     float interpolation_threshold;
     int blend_subs;
     char **user_shaders;
+    char **user_shader_opts;
     int deband;
     struct deband_opts *deband_opts;
     float unsharp;