29 lines
618 B
Bash
29 lines
618 B
Bash
/*
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* Copyright 2011-2017 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
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*/
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#include <bgfx_shader.sh>
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uniform vec4 u_params;
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#define u_textureLod u_params.x
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#define u_textureLayer u_params.y
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#define u_inLinear u_params.z
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#define u_ev u_params.w
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vec3 toLinear(vec3 _rgb)
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{
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return pow(abs(_rgb), vec3_splat(2.2) );
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}
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vec3 toGamma(vec3 _rgb)
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{
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return pow(abs(_rgb), vec3_splat(1.0/2.2) );
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}
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vec4 toEv(vec4 _color)
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{
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vec3 rgb = mix(toLinear(_color.xyz), _color.xyz, u_inLinear);
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return vec4(toGamma(rgb * pow(2.0, u_ev) ), _color.w);
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}
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