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add luminance curve editor for some reason

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Xonk
2023-07-07 00:08:46 -04:00
parent 625354b5b6
commit 97209646e9
4 changed files with 52 additions and 11 deletions
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45
shaders/final.fsh
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@ -14,6 +14,8 @@ uniform float viewHeight;
uniform float frameTimeCounter;
uniform int frameCounter;
uniform int isEyeInWater;
#include "lib/color_transforms.glsl"
#include "lib/color_dither.glsl"
#include "/lib/res_params.glsl"
@ -72,6 +74,36 @@ void applyContrast(inout vec3 color, float contrast){
color = (color - 0.5) * contrast + 0.5;
}
void applyLuminanceCurve(inout vec3 color, float darks, float brights){
// wash out darks
// brights = 2.77;
// darks = 2;
// neat curve
// brights = 3.16;
// darks = 1.44;
// neat curve
// brights = 2.27;
// darks = 5.0;
// SCKRUNKLE
// brights = 3.0;
// darks = 5.0;
vec3 darkCurve = pow(1.0 - pow(1.0 - color, vec3(darks)), vec3(1.0/darks));
vec3 brightCurve = pow(1.0 - pow(color, vec3(brights)), vec3(1.0/brights));
darkCurve = pow(darkCurve,vec3( 3 ));
brightCurve = pow(brightCurve,vec3( 3 ));
color = (darkCurve - brightCurve) * 0.5 + 0.5; // it goes -1 to 1 by default
color = clamp(color,0.0,1.0);
}
void main() {
#ifdef BICUBIC_UPSCALING
vec3 col = SampleTextureCatmullRom(colortex7,texcoord,1.0/texelSize).rgb;
@ -100,8 +132,13 @@ void main() {
vec3 diff = col-lum;
col = col + diff*(-lum*CROSSTALK + SATURATION);
applyContrast(col, CONTRAST);
gl_FragColor.rgb = clamp(int8Dither(col,texcoord),0.0,1.0);
vec3 FINAL_COLOR = clamp(int8Dither(col,texcoord),0.0,1.0);
#ifdef LUMINANCE_CURVE
applyLuminanceCurve(FINAL_COLOR, LOWER_CURVE_TAIL, UPPER_CURVE_TAIL);
#endif
applyContrast(FINAL_COLOR, CONTRAST); // for fun
gl_FragColor.rgb = FINAL_COLOR;
}