29 lines
618 B
Bash
29 lines
618 B
Bash
|
/*
|
||
|
|
* Copyright 2011-2018 Branimir Karadzic. All rights reserved.
|
||
|
|
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <bgfx_shader.sh>
|
||
|
|
|
||
|
|
uniform vec4 u_params;
|
||
|
|
#define u_textureLod u_params.x
|
||
|
|
#define u_textureLayer u_params.y
|
||
|
|
#define u_inLinear u_params.z
|
||
|
|
#define u_ev u_params.w
|
||
|
|
|
||
|
|
vec3 toLinear(vec3 _rgb)
|
||
|
|
{
|
||
|
|
return pow(abs(_rgb), vec3_splat(2.2) );
|
||
|
|
}
|
||
|
|
|
||
|
|
vec3 toGamma(vec3 _rgb)
|
||
|
|
{
|
||
|
|
return pow(abs(_rgb), vec3_splat(1.0/2.2) );
|
||
|
|
}
|
||
|
|
|
||
|
|
vec4 toEv(vec4 _color)
|
||
|
|
{
|
||
|
|
vec3 rgb = mix(toLinear(_color.xyz), _color.xyz, u_inLinear);
|
||
|
|
return vec4(toGamma(rgb * pow(2.0, u_ev) ), _color.w);
|
||
|
|
}
|