/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: some of this file.
 *
 * */

#ifndef __BLI_MATH_COLOR_H__
#define __BLI_MATH_COLOR_H__

/** \file
 * \ingroup bli
 */

#ifdef __cplusplus
extern "C" {
#endif

#include "BLI_math_inline.h"

/* YCbCr */
#define BLI_YCC_ITU_BT601 0
#define BLI_YCC_ITU_BT709 1
#define BLI_YCC_JFIF_0_255 2

/* YUV */
#define BLI_YUV_ITU_BT601 0
#define BLI_YUV_ITU_BT709 1

/******************* Conversion to RGB ********************/

void hsv_to_rgb(float h, float s, float v, float *r, float *g, float *b);
void hsv_to_rgb_v(const float hsv[3], float r_rgb[3]);
void hsl_to_rgb(float h, float c, float l, float *r, float *g, float *b);
void hsl_to_rgb_v(const float hcl[3], float r_rgb[3]);
void hex_to_rgb(char *hexcol, float *r, float *g, float *b);
void yuv_to_rgb(float y, float u, float v, float *lr, float *lg, float *lb, int colorspace);
void ycc_to_rgb(float y, float cb, float cr, float *lr, float *lg, float *lb, int colorspace);
void cpack_to_rgb(unsigned int col, float *r, float *g, float *b);

/***************** Conversion from RGB ********************/

void rgb_to_yuv(float r, float g, float b, float *ly, float *lu, float *lv, int colorspace);
void rgb_to_ycc(float r, float g, float b, float *ly, float *lcb, float *lcr, int colorspace);
void rgb_to_hsv(float r, float g, float b, float *lh, float *ls, float *lv);
void rgb_to_hsv_v(const float rgb[3], float r_hsv[3]);
void rgb_to_hsl(float r, float g, float b, float *lh, float *ls, float *ll);
void rgb_to_hsl_v(const float rgb[3], float r_hsl[3]);
void rgb_to_hsl_compat(float r, float g, float b, float *lh, float *ls, float *ll);
void rgb_to_hsl_compat_v(const float rgb[3], float r_hsl[3]);
void rgb_to_hsv_compat(float r, float g, float b, float *lh, float *ls, float *lv);
void rgb_to_hsv_compat_v(const float rgb[3], float r_hsv[3]);
unsigned int rgb_to_cpack(float r, float g, float b);
unsigned int hsv_to_cpack(float h, float s, float v);

/**************** Profile Transformations *****************/

float srgb_to_linearrgb(float c);
float linearrgb_to_srgb(float c);

MINLINE void srgb_to_linearrgb_v3_v3(float linear[3], const float srgb[3]);
MINLINE void linearrgb_to_srgb_v3_v3(float srgb[3], const float linear[3]);

MINLINE void srgb_to_linearrgb_v4(float linear[4], const float srgb[4]);
MINLINE void linearrgb_to_srgb_v4(float srgb[4], const float linear[4]);

MINLINE void srgb_to_linearrgb_predivide_v4(float linear[4], const float srgb[4]);
MINLINE void linearrgb_to_srgb_predivide_v4(float srgb[4], const float linear[4]);

MINLINE unsigned short to_srgb_table_lookup(const float f);
MINLINE void linearrgb_to_srgb_ushort4(unsigned short srgb[4], const float linear[4]);
MINLINE void srgb_to_linearrgb_uchar4(float linear[4], const unsigned char srgb[4]);
MINLINE void srgb_to_linearrgb_uchar4_predivide(float linear[4], const unsigned char srgb[4]);

MINLINE void linearrgb_to_srgb_uchar3(unsigned char srgb[3], const float linear[3]);
MINLINE void linearrgb_to_srgb_uchar4(unsigned char srgb[4], const float linear[4]);

void BLI_init_srgb_conversion(void);

/**************** Alpha Transformations *****************/

MINLINE void premul_to_straight_v4_v4(float straight[4], const float premul[4]);
MINLINE void premul_to_straight_v4(float color[4]);
MINLINE void straight_to_premul_v4_v4(float premul[4], const float straight[4]);
MINLINE void straight_to_premul_v4(float color[4]);
MINLINE void straight_uchar_to_premul_float(float result[4], const unsigned char color[4]);
MINLINE void premul_float_to_straight_uchar(unsigned char *result, const float color[4]);

/************************** Other *************************/

int constrain_rgb(float *r, float *g, float *b);
void minmax_rgb(short c[3]);
void hsv_clamp_v(float hsv[3], float v_max);

void rgb_float_set_hue_float_offset(float *rgb, float hue_offset);
void rgb_byte_set_hue_float_offset(unsigned char *rgb, float hue_offset);

void rgb_uchar_to_float(float r_col[3], const unsigned char col_ub[3]);
void rgba_uchar_to_float(float r_col[4], const unsigned char col_ub[4]);
void rgb_float_to_uchar(unsigned char r_col[3], const float col_f[3]);
void rgba_float_to_uchar(unsigned char r_col[4], const float col_f[4]);

MINLINE float rgb_to_grayscale(const float rgb[3]);
MINLINE unsigned char rgb_to_grayscale_byte(const unsigned char rgb[3]);

MINLINE int compare_rgb_uchar(const unsigned char a[3], const unsigned char b[3], const int limit);

MINLINE float dither_random_value(float s, float t);
MINLINE void float_to_byte_dither_v3(
    unsigned char b[3], const float f[3], float dither, float s, float t);

#define rgba_char_args_set_fl(col, r, g, b, a) \
  rgba_char_args_set(col, (r)*255, (g)*255, (b)*255, (a)*255)

#define rgba_float_args_set_ch(col, r, g, b, a) \
  rgba_float_args_set(col, (r) / 255.0f, (g) / 255.0f, (b) / 255.0f, (a) / 255.0f)

MINLINE void rgba_uchar_args_set(unsigned char col[4],
                                 const unsigned char r,
                                 const unsigned char g,
                                 const unsigned char b,
                                 const unsigned char a);
MINLINE void rgba_float_args_set(
    float col[4], const float r, const float g, const float b, const float a);
MINLINE void rgba_uchar_args_test_set(unsigned char col[4],
                                      const unsigned char r,
                                      const unsigned char g,
                                      const unsigned char b,
                                      const unsigned char a);
MINLINE void cpack_cpy_3ub(unsigned char r_col[3], const unsigned int pack);

void blackbody_temperature_to_rgb_table(float *r_table, int width, float min, float max);

/********* lift/gamma/gain / ASC-CDL conversion ***********/

void lift_gamma_gain_to_asc_cdl(
    float *lift, float *gamma, float *gain, float *offset, float *slope, float *power);

#if BLI_MATH_DO_INLINE
#  include "intern/math_color_inline.c"
#endif

#ifdef __cplusplus
}
#endif

#endif /* __BLI_MATH_COLOR_H__ */
