// AUTOGENERATED COPYRIGHT HEADER START
// Copyright (C) 2021-2023 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
// AUTOGENERATED COPYRIGHT HEADER END
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//    this list of conditions and the following disclaimer.
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//    may be used to endorse or promote products derived from this software
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// ================================================================================ //
// Matrices
// ================================================================================ //

#define RGB_YUV_709 float3x3( 0.21260,  0.71520,  0.07220,\
                             -0.11457, -0.38543,  0.50000,\
                              0.50000, -0.45415, -0.04585)
#define YUV_709_RGB float3x3( 1.00000,  0.00000,  1.57480,\
                              1.00000, -0.18732, -0.46812,\
                              1.00000,  1.85560,  0.00000)

// ================================================================================ //
// Functions: Balanced Color Conversion
// ================================================================================ //
float3 RGBtoYUV(float3 rgb, float3x3 m) {
	return mul(m, rgb) + float3(0, .5, .5);
}

float4 RGBAtoYUVA(float4 rgba, float3x3 m) {
	return float4(RGBtoYUV(rgba.rgb, m), rgba.a);
}

float3 YUVtoRGB(float3 yuv, float3x3 m) {
	return mul(m, yuv - float3(0, .5, .5));
}

float4 YUVAtoRGBA(float4 yuva, float3x3 m) {
	return float4(YUVtoRGB(yuva.rgb, m), yuva.a);
}

// ================================================================================ //
// Function: Unbalanced Color Conversion
// ================================================================================ //
float3 RGBtoYUVf(float3 rgb, float3x3 m) {
	return mul(m, rgb);
}

float4 RGBAtoYUVAf(float4 rgba, float3x3 m) {
	return float4(RGBtoYUVf(rgba.rgb, m), rgba.a);
}

float3 YUVtoRGBf(float3 yuv, float3x3 m) {
	return mul(m, yuv);
}

float4 YUVAtoRGBAf(float4 yuva, float3x3 m) {
	return float4(YUVtoRGBf(yuva.rgb, m), yuva.a);
}
