diff options
Diffstat (limited to 'system/shaders/GL/1.5/gl_tonemap.glsl')
-rw-r--r-- | system/shaders/GL/1.5/gl_tonemap.glsl | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/system/shaders/GL/1.5/gl_tonemap.glsl b/system/shaders/GL/1.5/gl_tonemap.glsl new file mode 100644 index 0000000..a70dca2 --- /dev/null +++ b/system/shaders/GL/1.5/gl_tonemap.glsl @@ -0,0 +1,50 @@ +#if (defined(KODI_TONE_MAPPING_REINHARD) || defined(KODI_TONE_MAPPING_ACES) || defined(KODI_TONE_MAPPING_HABLE)) +const float ST2084_m1 = 2610.0 / (4096.0 * 4.0); +const float ST2084_m2 = (2523.0 / 4096.0) * 128.0; +const float ST2084_c1 = 3424.0 / 4096.0; +const float ST2084_c2 = (2413.0 / 4096.0) * 32.0; +const float ST2084_c3 = (2392.0 / 4096.0) * 32.0; +#endif + +#if defined(KODI_TONE_MAPPING_REINHARD) +float reinhard(float x) +{ + return x * (1.0 + x / (m_toneP1 * m_toneP1)) / (1.0 + x); +} +#endif + +#if defined(KODI_TONE_MAPPING_ACES) +vec3 aces(vec3 x) +{ + float A = 2.51; + float B = 0.03; + float C = 2.43; + float D = 0.59; + float E = 0.14; + return (x * (A * x + B)) / (x * (C * x + D) + E); +} +#endif + +#if defined(KODI_TONE_MAPPING_HABLE) +vec3 hable(vec3 x) +{ + float A = 0.15; + float B = 0.5; + float C = 0.1; + float D = 0.2; + float E = 0.02; + float F = 0.3; + return ((x * (A * x + C * B) + D * E) / (x * (A * x + B) + D * F)) - E / F; +} +#endif + +#if (defined(KODI_TONE_MAPPING_ACES) || defined(KODI_TONE_MAPPING_HABLE)) +vec3 inversePQ(vec3 x) +{ + x = pow(max(x, 0.0), vec3(1.0 / ST2084_m2)); + x = max(x - ST2084_c1, 0.0) / (ST2084_c2 - ST2084_c3 * x); + x = pow(x, vec3(1.0 / ST2084_m1)); + return x; +} +#endif + |