diff options
Diffstat (limited to 'src/libcolour.c')
| -rw-r--r-- | src/libcolour.c | 717 |
1 files changed, 0 insertions, 717 deletions
diff --git a/src/libcolour.c b/src/libcolour.c deleted file mode 100644 index 867e280..0000000 --- a/src/libcolour.c +++ /dev/null @@ -1,717 +0,0 @@ -/** - * Copyright © 2016 Mattias Andrée <maandree@kth.se> - * - * 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 3 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, see <http://www.gnu.org/licenses/>. - */ -#include "libcolour.h" - -#include <alloca.h> -#include <errno.h> -#include <math.h> -#include <string.h> - - -#define MARSHAL_VERSION 0 - - - -double libcolour_srgb_encode(double t) -{ - double sign = 1; - if (t < 0) { - t = -t; - sign = -1; - } - t = t <= 0.0031306684425217108 ? 12.92 * t : 1.055 * pow(t, 1 / 2.4) - 0.055; - return t * sign; -} - -double libcolour_srgb_decode(double t) -{ - double sign = 1; - if (t < 0) { - t = -t; - sign = -1; - } - t = t <= 0.0031306684425217108 * 12.92 ? t / 12.92 : pow((t + 0.055) / 1.055, 2.4); - return t * sign; -} - - -int libcolour_delta_e(const libcolour_colour_t* a, const libcolour_colour_t* b, double* e) -{ - libcolour_cielab_t u, v; - u.model = v.model = LIBCOLOUR_CIELAB; - if (libcolour_convert(a, (libcolour_colour_t*)&u)) - return -1; - if (libcolour_convert(b, (libcolour_colour_t*)&v)) - return -1; - u.L -= v.L, u.L *= u.L; - u.a -= v.a, u.a *= u.a; - u.b -= v.b, u.b *= u.b; - *e = sqrt(u.L + u.a + u.b); - return 0; -} - - -#define eliminate(M, n, m) eliminate_(n, m, &(M)) -static int eliminate_(size_t n, size_t m, double (*Mp)[n][m]) -{ -#define M (*Mp) - size_t r1, r2, c; - double d; - double* R1; - double* R2; - for (r1 = 0; r1 < n; r1++) { - R1 = M[r1]; - if (R1[r1] == 0) { - for (r2 = r1 + 1; r2 < n; r2++) - if (M[r2][r1] != 0) - break; - if (r2 == n) { - errno = EDOM; - return -1; - } - R2 = M[r2]; - for (c = 0; c < m; c++) - d = R1[c], R1[c] = R2[c], R2[c] = d; - } - d = R1[r1]; - for (c = 0; c < m; c++) - R1[c] /= d; - for (r2 = r1 + 1; r2 < n; r2++) { - R2 = M[r2]; - d = R2[r1]; - for (c = 0; c < m; c++) - R2[c] -= R1[c] * d; - } - } - for (r1 = n; --r1;) { - R1 = M[r1]; - for (r2 = r1; r2--;) { - R2 = M[r2]; - d = R2[r1]; - for (c = 0; c < m; c++) - R2[c] -= R1[c] * d; - } - } - return 0; -#undef M -} - - -int libcolour_proper(libcolour_colour_t* colour) -{ - libcolour_colour_t r, g, b, w; - double m[3][4]; - switch (colour->model) { - case LIBCOLOUR_CIELUV: - colour->cieluv.white.model = LIBCOLOUR_CIEXYZ; - break; - case LIBCOLOUR_CIELCHUV: - colour->cielchuv.white.model = LIBCOLOUR_CIEXYZ; - if (colour->cielchuv.one_revolution == 0.) - colour->cielchuv.one_revolution = 360.; - break; - case LIBCOLOUR_RGB: - colour->rgb.red.model = LIBCOLOUR_CIEXYY; - colour->rgb.green.model = LIBCOLOUR_CIEXYY; - colour->rgb.blue.model = LIBCOLOUR_CIEXYY; - colour->rgb.white.model = LIBCOLOUR_CIEXYY; - colour->rgb.red.Y = 1; - colour->rgb.green.Y = 1; - colour->rgb.blue.Y = 1; - r.model = g.model = b.model = w.model = LIBCOLOUR_CIEXYZ; - libcolour_convert((const libcolour_colour_t*)&colour->rgb.red, &r); - libcolour_convert((const libcolour_colour_t*)&colour->rgb.green, &g); - libcolour_convert((const libcolour_colour_t*)&colour->rgb.blue, &b); - libcolour_convert((const libcolour_colour_t*)&colour->rgb.white, &w); - m[0][0] = r.ciexyz.X, m[0][1] = g.ciexyz.X, m[0][2] = b.ciexyz.X, m[0][3] = w.ciexyz.X; - m[1][0] = r.ciexyz.Y, m[1][1] = g.ciexyz.Y, m[1][2] = b.ciexyz.Y, m[1][3] = w.ciexyz.Y; - m[2][0] = r.ciexyz.Z, m[2][1] = g.ciexyz.Z, m[2][2] = b.ciexyz.Z, m[2][3] = w.ciexyz.Z; - if (eliminate(m, 3, 4)) - return -1; - colour->rgb.red.Y = m[0][3]; - colour->rgb.green.Y = m[1][3]; - colour->rgb.blue.Y = m[2][3]; - break; - default: - break; - } - return 0; -} - - -static int get_primaries(libcolour_rgb_t* cs) -{ - libcolour_colour_t r, g, b, w; - double Sr, Sg, Sb; - double M[3][6]; - - r.model = g.model = b.model = w.model = LIBCOLOUR_CIEXYZ; - r.ciexyz.Y = 1; - g.ciexyz.Y = 1; - b.ciexyz.Y = 1; - - Sr = cs->M[1][0] * cs->white_r; - Sg = cs->M[1][1] * cs->white_g; - Sb = cs->M[1][2] * cs->white_b; - - r.ciexyz.X = cs->M[0][0] / Sr, r.ciexyz.Z = cs->M[2][0] / Sr; - g.ciexyz.X = cs->M[0][1] / Sg, g.ciexyz.Z = cs->M[2][1] / Sg; - b.ciexyz.X = cs->M[0][2] / Sb, b.ciexyz.Z = cs->M[2][2] / Sb; - - M[0][0] = r.ciexyz.X, M[0][1] = g.ciexyz.X, M[0][2] = b.ciexyz.X, M[0][3] = 1, M[0][4] = 0, M[0][5] = 0; - M[1][0] = r.ciexyz.Y, M[1][1] = g.ciexyz.Y, M[1][2] = b.ciexyz.Y, M[1][3] = 0, M[1][4] = 1, M[1][5] = 0; - M[2][0] = r.ciexyz.Z, M[2][1] = g.ciexyz.Z, M[2][2] = b.ciexyz.Z, M[2][3] = 0, M[2][4] = 0, M[2][5] = 1; - - if (eliminate(M, 3, 6)) - return -1; - - memcpy(M[0], M[0] + 3, 3 * sizeof(double)), M[0][3] = Sr; - memcpy(M[1], M[1] + 3, 3 * sizeof(double)), M[1][3] = Sg; - memcpy(M[2], M[2] + 3, 3 * sizeof(double)), M[2][3] = Sb; - - if (eliminate(M, 3, 4)) - return -1; - - w.ciexyz.X = M[0][3]; - w.ciexyz.Y = M[1][3]; - w.ciexyz.Z = M[2][3]; - - cs->red.model = LIBCOLOUR_CIEXYY; - cs->green.model = LIBCOLOUR_CIEXYY; - cs->blue.model = LIBCOLOUR_CIEXYY; - cs->white.model = LIBCOLOUR_CIEXYY; - - libcolour_convert(&r, (libcolour_colour_t*)&cs->red); - libcolour_convert(&g, (libcolour_colour_t*)&cs->green); - libcolour_convert(&b, (libcolour_colour_t*)&cs->blue); - libcolour_convert(&w, (libcolour_colour_t*)&cs->white); - - return 0; -} - - -static int get_matrices(libcolour_rgb_t* cs) -{ - libcolour_colour_t r, g, b, w; - double M[3][6]; - double Sr, Sg, Sb; - - r.model = g.model = b.model = LIBCOLOUR_CIEXYZ; - w.model = LIBCOLOUR_CIEXYY; - libcolour_convert((const libcolour_colour_t*)&cs->red, &w), w.ciexyy.Y = 1, libcolour_convert(&w, &r); - libcolour_convert((const libcolour_colour_t*)&cs->green, &w), w.ciexyy.Y = 1, libcolour_convert(&w, &g); - libcolour_convert((const libcolour_colour_t*)&cs->blue, &w), w.ciexyy.Y = 1, libcolour_convert(&w, &b); - w.model = LIBCOLOUR_CIEXYZ; - libcolour_convert((const libcolour_colour_t*)&cs->white, &w); - - M[0][0] = r.ciexyz.X, M[0][1] = g.ciexyz.X, M[0][2] = b.ciexyz.X, M[0][3] = 1, M[0][4] = 0, M[0][5] = 0; - M[1][0] = r.ciexyz.Y, M[1][1] = g.ciexyz.Y, M[1][2] = b.ciexyz.Y, M[1][3] = 0, M[1][4] = 1, M[1][5] = 0; - M[2][0] = r.ciexyz.Z, M[2][1] = g.ciexyz.Z, M[2][2] = b.ciexyz.Z, M[2][3] = 0, M[2][4] = 0, M[2][5] = 1; - - if (eliminate(M, 3, 6)) - return -1; - - Sr = M[0][3] * w.ciexyz.X + M[0][4] * w.ciexyz.Y + M[0][5] * w.ciexyz.Z; - Sg = M[1][3] * w.ciexyz.X + M[1][4] * w.ciexyz.Y + M[1][5] * w.ciexyz.Z; - Sb = M[2][3] * w.ciexyz.X + M[2][4] * w.ciexyz.Y + M[2][5] * w.ciexyz.Z; - - Sr /= cs->white_r; - Sg /= cs->white_g; - Sb /= cs->white_b; - - cs->M[0][0] = Sr * r.ciexyz.X, cs->M[0][1] = Sg * g.ciexyz.X, cs->M[0][2] = Sb * b.ciexyz.X; - cs->M[1][0] = Sr * r.ciexyz.Y, cs->M[1][1] = Sg * g.ciexyz.Y, cs->M[1][2] = Sb * b.ciexyz.Y; - cs->M[2][0] = Sr * r.ciexyz.Z, cs->M[2][1] = Sg * g.ciexyz.Z, cs->M[2][2] = Sb * b.ciexyz.Z; - - memcpy(M[0], cs->M[0], 3 * sizeof(double)), M[0][3] = 1, M[0][4] = 0, M[0][5] = 0; - memcpy(M[1], cs->M[1], 3 * sizeof(double)), M[1][3] = 0, M[1][4] = 1, M[1][5] = 0; - memcpy(M[2], cs->M[2], 3 * sizeof(double)), M[2][3] = 0, M[2][4] = 0, M[2][5] = 1; - - if (eliminate(M, 3, 6)) - return -1; - - memcpy(cs->Minv[0], M[0] + 3, 3 * sizeof(double)); - memcpy(cs->Minv[1], M[1] + 3, 3 * sizeof(double)); - memcpy(cs->Minv[2], M[2] + 3, 3 * sizeof(double)); - - return 0; -} - - -#define invert(Minv, M, n) invert_(n, &(Minv), &(M)) -static int invert_(size_t n, double (*Minvp)[n][n], double (*Mp)[n][n]) -{ -#define Minv (*Minvp) -#define M (*Mp) -#define J (*Jp) - double J[n][2 * n] = alloca(sizeof(double[n][2 * n])); - size_t i; - for (i = 0; i < n; i++) { - memcpy(J[i], M[i], n * sizeof(double)); - memset(J[i] + n, 0, n * sizeof(double)); - J[i][n + i] = 1; - } - if (eliminate(J, n, 2 * n)) - return -1; - for (i = 0; i < n; i++) - memcpy(Minv[i], J[i] + n, n * sizeof(double)); - return 0; -#undef J -#undef M -#undef Minv -} - - -static double transfer_function_l_star(double t) -{ - double sign = 1; - if (t < 0) { - t = -t; - sign = -1; - } - t = t > 216. / 24389. ? 1.16 * cbrt(t) - 0.16 : t * 24389. / 2700.; - return t * sign; -} - -static double invtransfer_function_l_star(double t) -{ - double sign = 1; - if (t < 0) { - t = -t; - sign = -1; - } - t = t > 0.08 ? (((1000000. * t + 480000.) * t + 76800.) * t + 4096.) / 1560896.0 : t * 2700. / 24389.; - return t * sign; -} - -static double transfer_function_oetf_hlg(double t) -{ - double sign = 1; - if (t < 0) { - t = -t; - sign = -1; - } - t = 12 * t <= 1 ? sqrt(3 * t) : 0.17883277 * log(t - 0.02372241) + 1.004293468902569985701234145381; - return t * sign; -} - -static double invtransfer_function_oetf_hlg(double t) -{ - double sign = 1; - if (t < 0) { - t = -t; - sign = -1; - } - t = t <= 0.5 ? t * t / 3 : exp(t - 1.004293468902569985701234145381) / 0.17883277 + 0.02372241; - return t * sign; -} - - -static void get_transfer_function(libcolour_colour_t* cs) -{ - if (cs->model == LIBCOLOUR_RGB) { - switch (cs->rgb.colour_space) { - case LIBCOLOUR_RGB_COLOUR_SPACE_ECI_RGB_V2: - cs->rgb.to_encoded_red = cs->rgb.to_encoded_green = cs->rgb.to_encoded_blue = transfer_function_l_star; - cs->rgb.to_decoded_red = cs->rgb.to_decoded_green = cs->rgb.to_decoded_blue = invtransfer_function_l_star; - break; - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_EOTF_PQ: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_OOTF_PQ: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_OETF_PQ: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_EOTF_HLG: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_OOTF_HLG: - /* TODO http://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2100-0-201607-I!!PDF-E.pdf */ - break; - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_OETF_HLG: - cs->rgb.to_encoded_red = cs->rgb.to_encoded_green = cs->rgb.to_encoded_blue = transfer_function_oetf_hlg; - cs->rgb.to_decoded_red = cs->rgb.to_decoded_green = cs->rgb.to_decoded_blue = invtransfer_function_oetf_hlg; - break; - default: - break; - } - } -} - - -int libcolour_get_rgb_colour_space(libcolour_rgb_t* cs, libcolour_rgb_colour_space_t space) -{ -#define XYY(XVALUE, YVALUE) (libcolour_ciexyy_t){ .model = LIBCOLOUR_CIEXYY, .x = XVALUE, .y = YVALUE, .Y = 1} - - switch (space) { - case LIBCOLOUR_RGB_COLOUR_SPACE_CUSTOM_FROM_MEASUREMENTS: - if (get_matrices(cs)) - return -1; - if (cs->encoding_type == LIBCOLOUR_ENCODING_TYPE_REGULAR) - cs->transitioninv = cs->transition * cs->slope; - return 0; - - case LIBCOLOUR_RGB_COLOUR_SPACE_CUSTOM_FROM_MATRIX: - if (invert(cs->Minv, cs->M, 3) || get_primaries(cs)) - return -1; - if (cs->encoding_type == LIBCOLOUR_ENCODING_TYPE_REGULAR) - cs->transitioninv = cs->transition * cs->slope; - return 0; - - case LIBCOLOUR_RGB_COLOUR_SPACE_CUSTOM_FROM_INV_MATRIX: - if (invert(cs->M, cs->Minv, 3) || get_primaries(cs)) - return -1; - if (cs->encoding_type == LIBCOLOUR_ENCODING_TYPE_REGULAR) - cs->transitioninv = cs->transition * cs->slope; - return 0; - - case LIBCOLOUR_RGB_COLOUR_SPACE_SRGB: - cs->red = XYY(0.6400, 0.3300); - cs->green = XYY(0.3000, 0.6000); - cs->blue = XYY(0.1500, 0.0600); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->offset = 0.055; - cs->gamma = 2.4; - cs->slope = 12.92; - cs->transition = 0.0031306684425217108; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_ADOBE_RGB: - cs->red = XYY(0.6400, 0.3300); - cs->green = XYY(0.2100, 0.7100); - cs->blue = XYY(0.1500, 0.0600); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.2; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_APPLE_RGB: - cs->red = XYY(0.6250, 0.3400); - cs->green = XYY(0.2800, 0.5950); - cs->blue = XYY(0.1550, 0.0700); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 1.8; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_BEST_RGB: - cs->red = XYY(0.7347, 0.2653); - cs->green = XYY(0.2150, 0.7750); - cs->blue = XYY(0.1300, 0.0350); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.2; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_BETA_RGB: - cs->red = XYY(0.6888, 0.3112); - cs->green = XYY(0.1986, 0.7551); - cs->blue = XYY(0.1265, 0.0352); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.2; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_BRUCE_RGB: - cs->red = XYY(0.6400, 0.3300); - cs->green = XYY(0.2800, 0.6500); - cs->blue = XYY(0.1500, 0.0600); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.2; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_CIE_RGB: - cs->red = XYY(0.7350, 0.2650); - cs->green = XYY(0.2740, 0.7170); - cs->blue = XYY(0.1670, 0.0090); - cs->white = LIBCOLOUR_ILLUMINANT_E; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.2; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_COLORMATCH_RGB: - cs->red = XYY(0.6300, 0.3400); - cs->green = XYY(0.2950, 0.6050); - cs->blue = XYY(0.1500, 0.0750); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 1.8; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_DCI_P3_D65: - cs->red = XYY(0.6380, 0.3200); - cs->green = XYY(0.2650, 0.6900); - cs->blue = XYY(0.1500, 0.0600); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.6; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_DCI_P3_THEATER: - cs->red = XYY(0.6380, 0.3200); - cs->green = XYY(0.2650, 0.6900); - cs->blue = XYY(0.1500, 0.0600); - cs->white = XYY(0.314, 0.351); - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.6; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_DON_RGB_4: - cs->red = XYY(0.6960, 0.3000); - cs->green = XYY(0.2150, 0.7650); - cs->blue = XYY(0.1300, 0.0350); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.2; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_ECI_RGB: - cs->red = XYY(0.6700, 0.3300); - cs->green = XYY(0.2100, 0.7100); - cs->blue = XYY(0.1400, 0.0800); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 1.8; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_ECI_RGB_V2: - cs->red = XYY(0.6700, 0.3300); - cs->green = XYY(0.2100, 0.7100); - cs->blue = XYY(0.1400, 0.0800); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_CUSTOM; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_EKTA_SPACE_PS5: - cs->red = XYY(0.6950, 0.3050); - cs->green = XYY(0.2600, 0.7000); - cs->blue = XYY(0.1100, 0.0050); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.2; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_601_625_LINE: - cs->red = XYY(0.6400, 0.3300); - cs->green = XYY(0.2900, 0.6000); - cs->blue = XYY(0.1500, 0.0060); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->gamma = 1 / 0.45; - cs->offset = 0.09929682680944; - cs->slope = 4.5; - cs->transition = 0.018053968510807; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_601_525_LINE: - cs->red = XYY(0.6300, 0.3400); - cs->green = XYY(0.3100, 0.5950); - cs->blue = XYY(0.1550, 0.0700); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->gamma = 1 / 0.45; - cs->offset = 0.09929682680944; - cs->slope = 4.5; - cs->transition = 0.018053968510807; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_709: - cs->red = XYY(0.6300, 0.3300); - cs->green = XYY(0.3000, 0.6000); - cs->blue = XYY(0.1500, 0.0600); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->gamma = 1 / 0.45; - cs->offset = 0.09929682680944; - cs->slope = 4.5; - cs->transition = 0.018053968510807; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2020: - cs->red = XYY(0.7080, 0.2920); - cs->green = XYY(0.1700, 0.7970); - cs->blue = XYY(0.1310, 0.0460); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->gamma = 1 / 0.45; - cs->offset = 0.09929682680944; - cs->slope = 4.5; - cs->transition = 0.018053968510807; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_EOTF_PQ: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_OOTF_PQ: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_OETF_PQ: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_EOTF_HLG: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_OOTF_HLG: - case LIBCOLOUR_RGB_COLOUR_SPACE_ITU_R_BT_2100_OETF_HLG: - cs->red = XYY(0.7080, 0.2920); - cs->green = XYY(0.1700, 0.7970); - cs->blue = XYY(0.1310, 0.0460); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_CUSTOM; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_LIGHTROOM_RGB: - cs->red = XYY(0.7347, 0.2653); - cs->green = XYY(0.1596, 0.8404); - cs->blue = XYY(0.0366, 0.0001); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_LINEAR; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_NTSC_RGB: - cs->red = XYY(0.6700, 0.3300); - cs->green = XYY(0.2100, 0.7100); - cs->blue = XYY(0.1400, 0.0800); - cs->white = LIBCOLOUR_ILLUMINANT_C; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->gamma = 1 / 0.45; - cs->offset = 0.09929682680944; - cs->slope = 4.5; - cs->transition = 0.018053968510807; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_PAL_SECAM_RGB: - cs->red = XYY(0.6400, 0.3300); - cs->green = XYY(0.2900, 0.6000); - cs->blue = XYY(0.1500, 0.0600); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->gamma = 1 / 0.45; - cs->offset = 0.09929682680944; - cs->slope = 4.5; - cs->transition = 0.018053968510807; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_PROPHOTO_RGB: - cs->red = XYY(0.7347, 0.2653); - cs->green = XYY(0.1596, 0.8404); - cs->blue = XYY(0.0366, 0.0001); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 1.8; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_SGI_RGB: - cs->red = XYY(0.6250, 0.3400); - cs->green = XYY(0.2800, 0.5950); - cs->blue = XYY(0.1550, 0.0700); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 1.47; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_SMPTE_240M_RGB: - cs->red = XYY(0.6300, 0.3400); - cs->green = XYY(0.3100, 0.5950); - cs->blue = XYY(0.1550, 0.0700); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->gamma = 1 / 0.45; - cs->offset = 0.1115721957735072; - cs->slope = 4.0; - cs->transition = 0.022821585552393633; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_SMPTE_C_RGB: - cs->red = XYY(0.6300, 0.3400); - cs->green = XYY(0.3100, 0.5950); - cs->blue = XYY(0.1550, 0.0700); - cs->white = LIBCOLOUR_ILLUMINANT_D65; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_REGULAR; - cs->gamma = 1 / 0.45; - cs->offset = 0.09929682680944; - cs->slope = 4.5; - cs->transition = 0.018053968510807; - break; - - case LIBCOLOUR_RGB_COLOUR_SPACE_WIDE_GAMUT_RGB: - cs->red = XYY(0.7350, 0.2650); - cs->green = XYY(0.1150, 0.8260); - cs->blue = XYY(0.1570, 0.0180); - cs->white = LIBCOLOUR_ILLUMINANT_D50; - cs->encoding_type = LIBCOLOUR_ENCODING_TYPE_SIMPLE; - cs->gamma = 2.19921875; - break; - - default: - errno = EINVAL; - return -1; - } - if (cs->encoding_type == LIBCOLOUR_ENCODING_TYPE_REGULAR) - cs->transitioninv = cs->transition * cs->slope; - cs->colour_space = space; - cs->white_r = cs->white_g = cs->white_b = 1; - if (get_matrices(cs) || libcolour_proper((libcolour_colour_t*)cs)) - return -1; - get_transfer_function((libcolour_colour_t*)cs); - return 0; - -#undef XYY -} - - -size_t libcolour_marshal(const libcolour_colour_t* colour, void* buf) -{ - if (buf) - *(int*)buf = MARSHAL_VERSION; - switch (colour->model) { -#define X(C, T)\ - case C:\ - if (buf)\ - memcpy((char*)buf + sizeof(int), colour, sizeof(T));\ - return sizeof(int) + sizeof(T); - LIBCOLOUR_LIST_MODELS -#undef X - default: - errno = EINVAL; - return 0; - } -} - - -size_t libcolour_unmarshal(libcolour_colour_t* colour, const void* buf) -{ - enum libcolour_model model; - size_t r; - int ver; - ver = *(int*)buf; - if (ver != MARSHAL_VERSION) { - errno = EINVAL; - return 0; - } - model = *(enum libcolour_model*)((char*)buf + sizeof(int)); - switch (model) { -#define X(C, T)\ - case C:\ - if (colour)\ - memcpy(colour, (char*)buf + sizeof(int), sizeof(T));\ - r = sizeof(int) + sizeof(T);\ - break; - LIBCOLOUR_LIST_MODELS -#undef X - default: - errno = EINVAL; - return 0; - } - if (colour) { - if (colour->model == LIBCOLOUR_RGB) { - colour->rgb.to_encoded_red = colour->rgb.to_encoded_green = colour->rgb.to_encoded_blue = NULL; - colour->rgb.to_decoded_red = colour->rgb.to_decoded_green = colour->rgb.to_decoded_blue = NULL; - } - get_transfer_function(colour); - } - return r; -} - |