vo_gpu: improve tone mapping desaturation

Instead of desaturating towards luma, we desaturate towards the
per-channel tone mapped version. This essentially proves a smooth
roll-off towards the "hollywood"-style (non-chromatic) tone mapping
algorithm, which works better for bright content, while continuing to
use the "linear" style (chromatic) tone mapping algorithm for primarily
in-gamut content.

We also split up the desaturation algorithm into strength and exponent,
which allows users to use less aggressive desaturation settings without
affecting the overall curve.

1 files changed, 2 insertions, 4 deletions

diff --git a/video/out/gpu/video_shaders.h b/video/out/gpu/video_shaders.h
index cd395d6377..f20d643e99 100644
--- a/video/out/gpu/video_shaders.h
+++ b/video/out/gpu/video_shaders.h
@@ -40,11 +40,9 @@ void pass_sample_oversample(struct gl_shader_cache *sc, struct scaler *scaler,
 void pass_linearize(struct gl_shader_cache *sc, enum mp_csp_trc trc);
 void pass_delinearize(struct gl_shader_cache *sc, enum mp_csp_trc trc);
 
-void pass_color_map(struct gl_shader_cache *sc,
+void pass_color_map(struct gl_shader_cache *sc, bool is_linear,
                     struct mp_colorspace src, struct mp_colorspace dst,
-                    enum tone_mapping algo, float tone_mapping_param,
-                    float tone_mapping_desat, bool use_detected_peak,
-                    bool gamut_warning, bool is_linear);
+                    const struct gl_tone_map_opts *opts);
 
 void pass_sample_deband(struct gl_shader_cache *sc, struct deband_opts *opts,
                         AVLFG *lfg, enum mp_csp_trc trc);