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Add configurable saturation (#12865)

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* Add configurable saturation

Co-authored-by: Pevernow <3450354617@qq.com>
Co-authored-by: x2048 <codeforsmile@gmail.com>

Author:    Lars <larsh@apache.org>
This commit is contained in:
lhofhansl 2022-11-18 11:49:52 -08:00 • committed by GitHub
parent dac05a500e
commit 7bf64fc61a
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 29 additions and 1 deletions
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10
client/shaders/second_stage/opengl_fragment.glsl
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@ -5,6 +5,7 @@ uniform sampler2D rendered;
uniform sampler2D bloom;
uniform mediump float exposureFactor;
uniform lowp float bloomIntensity;
uniform lowp float saturation;
#ifdef GL_ES
varying mediump vec2 varTexCoord;
@ -57,6 +58,14 @@ vec4 applyToneMapping(vec4 color)
color.rgb *= whiteScale;
return color;
}
vec3 applySaturation(vec3 color, float factor)
{
// Calculate the perceived luminosity from the RGB color.
// See also: https://www.w3.org/WAI/GL/wiki/Relative_luminance
float brightness = dot(color, vec3(0.2125, 0.7154, 0.0721));
return mix(vec3(brightness), color, factor);
}
#endif
void main(void)
@ -85,6 +94,7 @@ void main(void)
{
#if ENABLE_TONE_MAPPING
color = applyToneMapping(color);
color.rgb = applySaturation(color.rgb, saturation);
#endif
}