diff options
Diffstat (limited to 'video/out/opengl/video_shaders.c')
| -rw-r--r-- | video/out/opengl/video_shaders.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/video/out/opengl/video_shaders.c b/video/out/opengl/video_shaders.c index 5421589d06..95ac712f05 100644 --- a/video/out/opengl/video_shaders.c +++ b/video/out/opengl/video_shaders.c @@ -377,6 +377,21 @@ static void pass_tone_map(struct gl_shader_cache *sc, float ref_peak, GLSL(color.rgb = clamp(color.rgb, 0.0, 1.0);) break; + case TONE_MAPPING_MOBIUS: { + float j = isnan(param) ? 0.3 : param; + // solve for M(j) = j; M(ref_peak) = 1.0; M'(j) = 1.0 + // where M(x) = scale * (x+a)/(x+b) + float a = -j*j * (ref_peak - 1) / (j*j - 2*j + ref_peak), + b = (j*j - 2*j*ref_peak + ref_peak) / (ref_peak - 1); + + GLSLF("color.rgb = mix(vec3(%f) * (color.rgb + vec3(%f))\n" + " / (color.rgb + vec3(%f)),\n" + " color.rgb,\n" + " lessThanEqual(color.rgb, vec3(%f)));\n", + (b*b + 2*b*j + j*j) / (b - a), a, b, j); + break; + } + case TONE_MAPPING_REINHARD: { float contrast = isnan(param) ? 0.5 : param, offset = (1.0 - contrast) / contrast; |