LYGIA Shader Library

reflect (lygia/v1.1.6/color/blend/reflect)

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

Use:

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

Check it on Github


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

vec3 blendReflect(in vec3 base, in vec3 blend) {
    return vec3(blendReflect(base.r, blend.r),
                blendReflect(base.g, blend.g),
                blendReflect(base.b, blend.b));
}

vec3 blendReflect(in vec3 base, in vec3 blend, in float opacity) {
    return (blendReflect(base, blend) * opacity + base * (1. - opacity));
}
#endif

Use:

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

Check it on Github


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

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

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

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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