LYGIA Shader Library

colorDodge (lygia/color/blend/colorDodge)

Photoshop Color Dodge blend mode mplementations sourced from this article on https://mouaif.wordpress.com/2009/01/05/photoshop-math-with-glsl-shaders/

Use:

blendColorDodge(<float|vec3> base, <float|vec3> blend [, <float> opacity])

Check it on Github


#ifndef FNC_BLENDCOLORDODGE
#define FNC_BLENDCOLORDODGE
float blendColorDodge(in float base, in float blend) { return (blend == 1.)? blend: min( base / (1. - blend), 1.); }
vec3  blendColorDodge(in vec3 base, in vec3 blend) {
    return vec3(blendColorDodge(base.r, blend.r),
                blendColorDodge(base.g, blend.g),
                blendColorDodge(base.b, blend.b));
}
vec3  blendColorDodge(in vec3 base, in vec3 blend, in float opacity) { return (blendColorDodge(base, blend) * opacity + base * (1. - opacity)); }
#endif

Use:

blendColorDodge(<float|float3> base, <float|float3> blend [, <float> opacity])

Check it on Github


#ifndef FNC_BLENDCOLORDODGE
#define FNC_BLENDCOLORDODGE
float blendColorDodge(in float base, in float blend) {
    return (blend == 1.)? blend: min( base / (1. - blend), 1.);
}

float3 blendColorDodge(in float3 base, in float3 blend) {
    return float3(    blendColorDodge(base.r, blend.r),
                    blendColorDodge(base.g, blend.g),
                    blendColorDodge(base.b, blend.b) );
}

float3 blendColorDodge(in float3 base, in float3 blend, in float opacity) {
    return (blendColorDodge(base, blend) * opacity + base * (1. - opacity));
}
#endif

Use:

blendColorDodge(<float|float3> base, <float|float3> blend [, <float> opacity])

Check it on Github


#ifndef FNC_BLENDCOLORDODGE
#define FNC_BLENDCOLORDODGE
float blendColorDodge(float base, float blend) { return (blend == 1.)? blend: min( base / (1. - blend), 1.); }
float3  blendColorDodge(float3 base, float3 blend) {
    return float3(blendColorDodge(base.r, blend.r),
                blendColorDodge(base.g, blend.g),
                blendColorDodge(base.b, blend.b));
}
float3  blendColorDodge(float3 base, float3 blend, float opacity) { return (blendColorDodge(base, blend) * opacity + base * (1. - opacity)); }
#endif

License

MIT License (MIT) Copyright (c) 2015 Jamie Owen

LYGIA is dual-licensed under the Prosperity License and the Patron License for sponsors and contributors.

Sponsors and contributors are automatically added to the Patron License and they can ignore the any non-commercial rule of the Prosperity Licensed software (please take a look to the exception).

It's also possible to get a permanent comercial license hook to a single and specific version of LYGIA.

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