From f527ce5b2f5bb300a7fe55db33d1e3a4da8051c7 Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brechtvanlommel@gmail.com>
Date: Fri, 12 Oct 2018 16:42:34 +0200
Subject: Color management: add OCIO aware utility functions for transform
 to/from XYZ.

---
 source/blender/blenlib/intern/math_color.c | 81 ------------------------------
 1 file changed, 81 deletions(-)

(limited to 'source/blender/blenlib/intern/math_color.c')

diff --git a/source/blender/blenlib/intern/math_color.c b/source/blender/blenlib/intern/math_color.c
index 9399646bedf..09a5762e4e0 100644
--- a/source/blender/blenlib/intern/math_color.c
+++ b/source/blender/blenlib/intern/math_color.c
@@ -357,29 +357,6 @@ void hsv_clamp_v(float hsv[3], float v_max)
 	CLAMP(hsv[2], 0.0f, v_max);
 }
 
-/*http://brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html */
-
-void xyz_to_rgb(float xc, float yc, float zc, float *r, float *g, float *b, int colorspace)
-{
-	switch (colorspace) {
-		case BLI_XYZ_SMPTE:
-			*r = (3.50570f * xc) + (-1.73964f * yc) + (-0.544011f * zc);
-			*g = (-1.06906f * xc) + (1.97781f * yc) + (0.0351720f * zc);
-			*b = (0.0563117f * xc) + (-0.196994f * yc) + (1.05005f * zc);
-			break;
-		case BLI_XYZ_REC709_SRGB:
-			*r = (3.240476f * xc) + (-1.537150f * yc) + (-0.498535f * zc);
-			*g = (-0.969256f * xc) + (1.875992f * yc) + (0.041556f * zc);
-			*b = (0.055648f * xc) + (-0.204043f * yc) + (1.057311f * zc);
-			break;
-		case BLI_XYZ_CIE:
-			*r = (2.28783848734076f * xc) + (-0.833367677835217f * yc) + (-0.454470795871421f * zc);
-			*g = (-0.511651380743862f * xc) + (1.42275837632178f * yc) + (0.0888930017552939f * zc);
-			*b = (0.00572040983140966f * xc) + (-0.0159068485104036f * yc) + (1.0101864083734f * zc);
-			break;
-	}
-}
-
 /**
  * We define a 'cpack' here as a (3 byte color code) number that can be expressed like 0xFFAA66 or so.
  * for that reason it is sensitive for endianness... with this function it works correctly.
@@ -618,64 +595,6 @@ void BLI_init_srgb_conversion(void)
 		BLI_color_to_srgb_table[i] = (unsigned short)(b * 0x100);
 	}
 }
-static float inverse_srgb_companding(float v)
-{
-	if (v > 0.04045f) {
-		return powf((v + 0.055f) / 1.055f, 2.4f);
-	}
-	else {
-		return v / 12.92f;
-	}
-}
-
-/**
- * \note Does sRGB to linear conversion
- */
-void rgb_to_xyz(float r, float g, float b, float *x, float *y, float *z)
-{
-	r = inverse_srgb_companding(r) * 100.0f;
-	g = inverse_srgb_companding(g) * 100.0f;
-	b = inverse_srgb_companding(b) * 100.0f;
-
-	*x = r * 0.412453f + g * 0.357580f + b * 0.180423f;
-	*y = r * 0.212671f + g * 0.715160f + b * 0.072169f;
-	*z = r * 0.019334f + g * 0.119193f + b * 0.950227f;
-}
-
-static float xyz_to_lab_component(float v)
-{
-	const float eps = 0.008856f;
-	const float k = 903.3f;
-
-	if (v > eps) {
-		return powf(v, 1.0f / 3.0f);
-	}
-	else {
-		return (k * v + 16.0f) / 116.0f;
-	}
-}
-
-void xyz_to_lab(float x, float y, float z, float *l, float *a, float *b)
-{
-	const float xr = x / 95.047f;
-	const float yr = y / 100.0f;
-	const float zr = z / 108.883f;
-
-	const float fx = xyz_to_lab_component(xr);
-	const float fy = xyz_to_lab_component(yr);
-	const float fz = xyz_to_lab_component(zr);
-
-	*l = 116.0f * fy - 16.0f;
-	*a = 500.0f * (fx - fy);
-	*b = 200.0f * (fy - fz);
-}
-
-void rgb_to_lab(float r, float g, float b, float *ll, float *la, float *lb)
-{
-	float x, y, z;
-	rgb_to_xyz(r, g, b, &x, &y, &z);
-	xyz_to_lab(x, y, z, ll, la, lb);
-}
 
 /* ****************************** blackbody ******************************** */
 
-- 
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