Differential D4727 Diff 14887 source/blender/blenlib/intern/math_color.c

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source/blender/blenlib/intern/math_color.c

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#include <assert.h>		#include <assert.h>

#include "BLI_math.h"		#include "BLI_math.h"
#include "BLI_utildefines.h"		#include "BLI_utildefines.h"

#include "BLI_strict_flags.h"		#include "BLI_strict_flags.h"

		#define CLAMP3_VARS(a, b, c, min, max) \
		{ \
		CLAMP(a, min, max); \
		CLAMP(b, min, max); \
		CLAMP(c, min, max); \
		} \
		(void)0

void hsv_to_rgb(float h, float s, float v, float r, float g, float *b)		void hsv_to_rgb(float h, float s, float v, float r, float g, float *b)
{		{
float nr, ng, nb;		float nr, ng, nb;
		CLAMP3_VARS(h, s, v, 0.0f, 1.0f);

nr = fabsf(h * 6.0f - 3.0f) - 1.0f;		nr = fabsf(h * 6.0f - 3.0f) - 1.0f;
ng = 2.0f - fabsf(h * 6.0f - 2.0f);		ng = 2.0f - fabsf(h * 6.0f - 2.0f);
nb = 2.0f - fabsf(h * 6.0f - 4.0f);		nb = 2.0f - fabsf(h * 6.0f - 4.0f);

CLAMP(nr, 0.0f, 1.0f);		CLAMP(nr, 0.0f, 1.0f);
CLAMP(nb, 0.0f, 1.0f);		CLAMP(nb, 0.0f, 1.0f);
CLAMP(ng, 0.0f, 1.0f);		CLAMP(ng, 0.0f, 1.0f);

r = ((nr - 1.0f) s + 1.0f) * v;		r = ((nr - 1.0f) s + 1.0f) * v;
g = ((ng - 1.0f) s + 1.0f) * v;		g = ((ng - 1.0f) s + 1.0f) * v;
b = ((nb - 1.0f) s + 1.0f) * v;		b = ((nb - 1.0f) s + 1.0f) * v;
}		}

void hsl_to_rgb(float h, float s, float l, float r, float g, float *b)		void hsl_to_rgb(float h, float s, float l, float r, float g, float *b)
{		{
float nr, ng, nb, chroma;		float nr, ng, nb, chroma;
		CLAMP3_VARS(h, s, l, 0.0f, 1.0f);

nr = fabsf(h * 6.0f - 3.0f) - 1.0f;		nr = fabsf(h * 6.0f - 3.0f) - 1.0f;
ng = 2.0f - fabsf(h * 6.0f - 2.0f);		ng = 2.0f - fabsf(h * 6.0f - 2.0f);
nb = 2.0f - fabsf(h * 6.0f - 4.0f);		nb = 2.0f - fabsf(h * 6.0f - 4.0f);

CLAMP(nr, 0.0f, 1.0f);		CLAMP(nr, 0.0f, 1.0f);
CLAMP(nb, 0.0f, 1.0f);		CLAMP(nb, 0.0f, 1.0f);
CLAMP(ng, 0.0f, 1.0f);		CLAMP(ng, 0.0f, 1.0f);
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{		{
hsl_to_rgb(hsl[0], hsl[1], hsl[2], &r_rgb[0], &r_rgb[1], &r_rgb[2]);		hsl_to_rgb(hsl[0], hsl[1], hsl[2], &r_rgb[0], &r_rgb[1], &r_rgb[2]);
}		}

void rgb_to_yuv(float r, float g, float b, float ly, float lu, float *lv, int colorspace)		void rgb_to_yuv(float r, float g, float b, float ly, float lu, float *lv, int colorspace)
{		{
float y, u, v;		float y, u, v;

		CLAMP3_VARS(r, g, b, 0.0f, 1.0f);

switch (colorspace) {		switch (colorspace) {
case BLI_YUV_ITU_BT601:		case BLI_YUV_ITU_BT601:
y = 0.299f * r + 0.587f * g + 0.114f * b;		y = 0.299f * r + 0.587f * g + 0.114f * b;
u = -0.147f * r - 0.289f * g + 0.436f * b;		u = -0.147f * r - 0.289f * g + 0.436f * b;
v = 0.615f * r - 0.515f * g - 0.100f * b;		v = 0.615f * r - 0.515f * g - 0.100f * b;
break;		break;
case BLI_YUV_ITU_BT709:		case BLI_YUV_ITU_BT709:
default:		default:
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/* The RGB inputs are supposed gamma corrected and in the range 0 - 1.0f		/* The RGB inputs are supposed gamma corrected and in the range 0 - 1.0f
*		*
* Output YCC have a range of 16-235 and 16-240 except with JFIF_0_255 where the range is 0-255 */		* Output YCC have a range of 16-235 and 16-240 except with JFIF_0_255 where the range is 0-255 */
void rgb_to_ycc(float r, float g, float b, float ly, float lcb, float *lcr, int colorspace)		void rgb_to_ycc(float r, float g, float b, float ly, float lcb, float *lcr, int colorspace)
{		{
float sr, sg, sb;		float sr, sg, sb;
float y = 128.0f, cr = 128.0f, cb = 128.0f;		float y = 128.0f, cr = 128.0f, cb = 128.0f;

		CLAMP3_VARS(r, g, b, 0.0f, 1.0f);

sr = 255.0f * r;		sr = 255.0f * r;
sg = 255.0f * g;		sg = 255.0f * g;
sb = 255.0f * b;		sb = 255.0f * b;

switch (colorspace) {		switch (colorspace) {
case BLI_YCC_ITU_BT601:		case BLI_YCC_ITU_BT601:
y = (0.257f * sr) + (0.504f * sg) + (0.098f * sb) + 16.0f;		y = (0.257f * sr) + (0.504f * sg) + (0.098f * sb) + 16.0f;
cb = (-0.148f * sr) - (0.291f * sg) + (0.439f * sb) + 128.0f;		cb = (-0.148f * sr) - (0.291f * sg) + (0.439f * sb) + 128.0f;
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}		}

void rgb_to_hsv(float r, float g, float b, float lh, float ls, float *lv)		void rgb_to_hsv(float r, float g, float b, float lh, float ls, float *lv)
{		{
float k = 0.0f;		float k = 0.0f;
float chroma;		float chroma;
float min_gb;		float min_gb;

		CLAMP3_VARS(r, g, b, 0.0f, 1.0f);

if (g < b) {		if (g < b) {
SWAP(float, g, b);		SWAP(float, g, b);
k = -1.0f;		k = -1.0f;
}		}
min_gb = b;		min_gb = b;
if (r < g) {		if (r < g) {
SWAP(float, r, g);		SWAP(float, r, g);
k = -2.0f / 6.0f - k;		k = -2.0f / 6.0f - k;
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/* convenience function for now */		/* convenience function for now */
void rgb_to_hsv_v(const float rgb[3], float r_hsv[3])		void rgb_to_hsv_v(const float rgb[3], float r_hsv[3])
{		{
rgb_to_hsv(rgb[0], rgb[1], rgb[2], &r_hsv[0], &r_hsv[1], &r_hsv[2]);		rgb_to_hsv(rgb[0], rgb[1], rgb[2], &r_hsv[0], &r_hsv[1], &r_hsv[2]);
}		}

void rgb_to_hsl(float r, float g, float b, float lh, float ls, float *ll)		void rgb_to_hsl(float r, float g, float b, float lh, float ls, float *ll)
{		{
		CLAMP3_VARS(r, g, b, 0.0f, 1.0f);

const float cmax = max_fff(r, g, b);		const float cmax = max_fff(r, g, b);
const float cmin = min_fff(r, g, b);		const float cmin = min_fff(r, g, b);
float h, s, l = min_ff(1.0, (cmax + cmin) / 2.0f);		float h, s, l = min_ff(1.0, (cmax + cmin) / 2.0f);

if (cmax == cmin) {		if (cmax == cmin) {
h = s = 0.0f; // achromatic		h = s = 0.0f; // achromatic
}		}
else {		else {
Show All 13 Lines	void rgb_to_hsl(float r, float g, float b, float lh, float ls, float *ll)

*lh = h;		*lh = h;
*ls = s;		*ls = s;
*ll = l;		*ll = l;
}		}

void rgb_to_hsl_compat(float r, float g, float b, float lh, float ls, float *ll)		void rgb_to_hsl_compat(float r, float g, float b, float lh, float ls, float *ll)
{		{
		CLAMP3_VARS(r, g, b, 0.0f, 1.0f);

const float orig_s = *ls;		const float orig_s = *ls;
const float orig_h = *lh;		const float orig_h = *lh;

rgb_to_hsl(r, g, b, lh, ls, ll);		rgb_to_hsl(r, g, b, lh, ls, ll);

if (*ll <= 0.0f) {		if (*ll <= 0.0f) {
*lh = orig_h;		*lh = orig_h;
*ls = orig_s;		*ls = orig_s;
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/* convenience function for now */		/* convenience function for now */
void rgb_to_hsl_v(const float rgb[3], float r_hsl[3])		void rgb_to_hsl_v(const float rgb[3], float r_hsl[3])
{		{
rgb_to_hsl(rgb[0], rgb[1], rgb[2], &r_hsl[0], &r_hsl[1], &r_hsl[2]);		rgb_to_hsl(rgb[0], rgb[1], rgb[2], &r_hsl[0], &r_hsl[1], &r_hsl[2]);
}		}

void rgb_to_hsv_compat(float r, float g, float b, float lh, float ls, float *lv)		void rgb_to_hsv_compat(float r, float g, float b, float lh, float ls, float *lv)
{		{
		CLAMP3_VARS(r, g, b, 0.0f, 1.0f);

const float orig_h = *lh;		const float orig_h = *lh;
const float orig_s = *ls;		const float orig_s = *ls;

rgb_to_hsv(r, g, b, lh, ls, lv);		rgb_to_hsv(r, g, b, lh, ls, lv);

if (*lv <= 1e-8) {		if (*lv <= 1e-8) {
/* Very low v values will affect the hs values, correct them in post. */		/* Very low v values will affect the hs values, correct them in post. */
*lh = orig_h;		*lh = orig_h;
▲ Show 20 Lines • Show All 45 Lines • ▼ Show 20 Lines	unsigned int hsv_to_cpack(float h, float s, float v)
col = (r + (g * 256) + (b * 256 * 256));		col = (r + (g * 256) + (b * 256 * 256));
return col;		return col;
}		}

unsigned int rgb_to_cpack(float r, float g, float b)		unsigned int rgb_to_cpack(float r, float g, float b)
{		{
unsigned int ir, ig, ib;		unsigned int ir, ig, ib;

		CLAMP3_VARS(r, g, b, 0.0f, 1.0f);

ir = (unsigned int)floorf(255.0f * max_ff(r, 0.0f));		ir = (unsigned int)floorf(255.0f * max_ff(r, 0.0f));
ig = (unsigned int)floorf(255.0f * max_ff(g, 0.0f));		ig = (unsigned int)floorf(255.0f * max_ff(g, 0.0f));
ib = (unsigned int)floorf(255.0f * max_ff(b, 0.0f));		ib = (unsigned int)floorf(255.0f * max_ff(b, 0.0f));

if (ir > 255) {		if (ir > 255) {
ir = 255;		ir = 255;
}		}
if (ig > 255) {		if (ig > 255) {
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