Mixbox for Shaders

GLSL Shader

#ifdef GL_ES
precision highp float;
#endif

// uncomment the following line if you work in linear space
// #define MIXBOX_COLORSPACE_LINEAR

uniform sampler2D mixbox_lut; // bind the "mixbox_lut.png" texture here

#include "mixbox.glsl" // paste the contents of mixbox.glsl here

void main(void)
{
    vec3 rgb1 = vec3(0, 0.129, 0.522); // blue
    vec3 rgb2 = vec3(0.988, 0.827, 0); // yellow
    float t = 0.5;                     // mixing ratio

    vec3 rgb = mixbox_lerp(rgb1, rgb2, t);

    gl_FragColor = vec4(rgb, 1.0);
}

vec3 mix_three(vec3 rgb1, vec3 rgb2, vec3 rgb3)
{
    mixbox_latent z1 = mixbox_rgb_to_latent(rgb1);
    mixbox_latent z2 = mixbox_rgb_to_latent(rgb2);
    mixbox_latent z3 = mixbox_rgb_to_latent(rgb3);

    // mix together 30% of rgb1, 60% of rgb2, and 10% of rgb3
    mixbox_latent z_mix = 0.3*z1 + 0.6*z2 + 0.1*z3;

    vec3 rgb_mix = mixbox_latent_to_rgb(z_mix);

    return rgb_mix;
}

HLSL Shader

// uncomment the following line if you work in linear space
// #define MIXBOX_COLORSPACE_LINEAR

Texture2D MixboxLUT; // bind the "mixbox_lut.png" texture here
SamplerState MixboxSampler; // FILTER_MIN_MAG_LINEAR_MIP_POINT

#define MIXBOX_LUT(UV) MixboxLUT.SampleLevel(MixboxSampler, UV, 0)

#include "mixbox.hlsl"

float4 PSMain() : SV_Target
{
    float3 rgb1 = float3(0, 0.129, 0.522); // blue
    float3 rgb2 = float3(0.988, 0.827, 0); // yellow
    float t = 0.5;                         // mixing ratio

    float3 rgb_mix = MixboxLerp(rgb1, rgb2, t);

    return float4(rgb_mix, 1.0);
}

float3 MixThree(float3 rgb1, float3 rgb2, float3 rgb3)
{
    MixboxLatent z1 = MixboxRGBToLatent(rgb1);
    MixboxLatent z2 = MixboxRGBToLatent(rgb2);
    MixboxLatent z3 = MixboxRGBToLatent(rgb3);

    // mix together 30% of rgb1, 60% of rgb2, and 10% of rgb3
    MixboxLatent zMix = 0.3*z1 + 0.6*z2 + 0.1*z3;

    float3 rgbMix = MixboxLatentToRGB(zMix);

    return rgbMix;
}

Pigment Colors

Pigment		RGB	Float RGB	Linear RGB
Cadmium Yellow		254, 236, 0	0.996, 0.925, 0.0	0.991, 0.839, 0.0
Hansa Yellow		252, 211, 0	0.988, 0.827, 0.0	0.973, 0.651, 0.0
Cadmium Orange		255, 105, 0	1.0, 0.412, 0.0	1.0, 0.141, 0.0
Cadmium Red		255, 39, 2	1.0, 0.153, 0.008	1.0, 0.02, 0.001
Quinacridone Magenta		128, 2, 46	0.502, 0.008, 0.18	0.216, 0.001, 0.027
Cobalt Violet		78, 0, 66	0.306, 0.0, 0.259	0.076, 0.0, 0.054
Ultramarine Blue		25, 0, 89	0.098, 0.0, 0.349	0.01, 0.0, 0.1
Cobalt Blue		0, 33, 133	0.0, 0.129, 0.522	0.0, 0.015, 0.235
Phthalo Blue		13, 27, 68	0.051, 0.106, 0.267	0.004, 0.011, 0.058
Phthalo Green		0, 60, 50	0.0, 0.235, 0.196	0.0, 0.045, 0.032
Permanent Green		7, 109, 22	0.027, 0.427, 0.086	0.002, 0.153, 0.008
Sap Green		107, 148, 4	0.42, 0.58, 0.016	0.147, 0.296, 0.001
Burnt Sienna		123, 72, 0	0.482, 0.282, 0.0	0.198, 0.065, 0.0