LYGIA Shader Library

Use:

<vec3|vec4> yiq2rgb(<vec3|vec4> color)

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#ifndef MAT_YIQ2RGB
#define MAT_YIQ2RGB
const mat3 YIQ2RGB = mat3(  1.0,  0.9469,  0.6235, 
                            1.0, -0.2747, -0.6357, 
                            1.0, -1.1085,  1.7020 );
#endif

#ifndef FNC_YIQ2RGB
#define FNC_YIQ2RGB
vec3 yiq2rgb(const in vec3 yiq) { return YIQ2RGB * yiq; }
vec4 yiq2rgb(const in vec4 yiq) { return vec4(yiq2rgb(yiq.rgb), yiq.a); }
#endif

Use:

<float3|float4> yiq2rgb(<float3|float4> color)

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#ifndef MAT_YIQ2RGB
#define MAT_YIQ2RGB
static const float3x3 YIQ2RGB = float3x3(  1.0,  0.9469,  0.6235, 
                                    1.0, -0.2747, -0.6357, 
                                    1.0, -1.1085,  1.7020 );
#endif

#ifndef FNC_YIQ2RGB
#define FNC_YIQ2RGB
float3 yiq2rgb(in float3 yiq) { return mul(YIQ2RGB, yiq); }
float4 yiq2rgb(in float4 yiq) { return float4(yiq2rgb(yiq.rgb), yiq.a); }
#endif

Use:

<float3|float4> yiq2rgb(<float3|float4> color)

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#ifndef MAT_YIQ2RGB
#define MAT_YIQ2RGB
constant matrix<float, 3, 3> YIQ2RGB = matrix<float, 3, 3>(  1.0,  0.9469,  0.6235, 
                            1.0, -0.2747, -0.6357, 
                            1.0, -1.1085,  1.7020 );
#endif

#ifndef FNC_YIQ2RGB
#define FNC_YIQ2RGB
float3 yiq2rgb( float3 yiq) { return YIQ2RGB * yiq; }
float4 yiq2rgb( float4 yiq) { return float4(yiq2rgb(yiq.rgb), yiq.a); }
#endif

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const YIQ2RGB : mat3x3<f32>  = mat3x3<f32>( 
    vec3f(1.0,  0.9469,  0.6235), 
    vec3f(1.0, -0.2747, -0.6357), 
    vec3f(1.0, -1.1085,  1.7020) );
fn yiq2rgb(yiq : vec3f) -> vec3f { return YIQ2RGB * yiq; }