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Diffstat (limited to '')
| -rw-r--r-- | common.h | 487 |
1 files changed, 487 insertions, 0 deletions
diff --git a/common.h b/common.h new file mode 100644 index 0000000..5c781b6 --- /dev/null +++ b/common.h @@ -0,0 +1,487 @@ +/* See LICENSE file for copyright and license details. */ + +#if defined(__GNUC__) && !defined(__clang__) +# pragma GCC diagnostic ignored "-Wfloat-equal" +#elif defined(__clang__) +# pragma clang diagnostic ignored "-Wcomma" +# pragma clang diagnostic ignored "-Wfloat-equal" +# pragma clang diagnostic ignored "-Wvla" +# pragma clang diagnostic ignored "-Wtautological-compare" +# pragma clang diagnostic ignored "-Wcovered-switch-default" +# pragma clang diagnostic ignored "-Wfloat-conversion" +# pragma clang diagnostic ignored "-Wconversion" +# pragma clang diagnostic ignored "-Wdouble-promotion" +# pragma clang diagnostic ignored "-Wswitch-enum" +# pragma clang diagnostic ignored "-Wcast-align" +#endif + + + +#define PI D(3.14159265358979323846) +#define PI2 (2 * D(3.14159265358979323846)) +#define WASDIV0(X) (xisinf(X) || xisnan(X)) + +#define REGULAR(S, T) ((T) <= (S)->TRANSITION ? (S)->SLOPE * (T) : (1 + (S)->OFFSET) * xpow((T), 1 / (S)->GAMMA) - (S)->OFFSET) +#define INVREGULAR(S, T) ((T) <= (S)->TRANSITIONINV ? (T) / (S)->SLOPE : xpow(((T) + (S)->OFFSET) / (1 + (S)->OFFSET), (S)->GAMMA)) + +#define XTRANSFORM(X, Y, Z, A, B, C, R1C1, R1C2, R1C3, R2C1, R2C2, R2C3, R3C1, R3C2, R3C3)\ + do {\ + TYPE a__ = (A), b__ = (B), c__ = (C);\ + (X) = (R1C1) * a__ + (R1C2) * b__ + (R1C3) * c__;\ + (Y) = (R2C1) * a__ + (R2C2) * b__ + (R2C3) * c__;\ + (Z) = (R3C1) * a__ + (R3C2) * b__ + (R3C3) * c__;\ + } while (0) + +#define TRANSFORM(X, Y, Z, A, B, C, R1C1, R1C2, R1C3, R2C1, R2C2, R2C3, R3C1, R3C2, R3C3)\ + XTRANSFORM((X), (Y), (Z), (A), (B), (C),\ + D(R1C1), D(R1C2), D(R1C3),\ + D(R2C1), D(R2C2), D(R2C3),\ + D(R3C1), D(R3C2), D(R3C3)) + + + +#define SLOPE transfer.regular.slope +#define TRANSITIONINV transfer.regular.transitioninv +#define TRANSITION transfer.regular.transition +#define GAMMA transfer.regular.gamma +#define OFFSET transfer.regular.offset +#define TO_ENCODED_RED transfer.custom.to_encoded_red +#define TO_DECODED_RED transfer.custom.to_decoded_red +#define TO_ENCODED_GREEN transfer.custom.to_encoded_green +#define TO_DECODED_GREEN transfer.custom.to_decoded_green +#define TO_ENCODED_BLUE transfer.custom.to_encoded_blue +#define TO_DECODED_BLUE transfer.custom.to_decoded_blue + + + +#define CIEXYZ_TO_RGB(FROM_X, FROM_Y, FROM_Z, TO_R, TO_G, TO_B, TO_MINV)\ + XTRANSFORM((TO_R), (TO_G), (TO_B), (FROM_X), (FROM_Y), (FROM_Z),\ + (TO_MINV)[0][0], (TO_MINV)[0][1], (TO_MINV)[0][2],\ + (TO_MINV)[1][0], (TO_MINV)[1][1], (TO_MINV)[1][2],\ + (TO_MINV)[2][0], (TO_MINV)[2][1], (TO_MINV)[2][2]) + +#define CIEXYZ_TO_SRGB(FROM_X, FROM_Y, FROM_Z, TO_R, TO_G, TO_B)\ + TRANSFORM((TO_R), (TO_G), (TO_B), (FROM_X), (FROM_Y), (FROM_Z),\ + 3.240446254647737500675930277794, -1.537134761820080575134284117667, -0.498530193022728718155178739835,\ + -0.969266606244679751469561779231, 1.876011959788370209167851498933, 0.041556042214430065351304932619,\ + 0.055643503564352832235773149705, -0.204026179735960239147729566866, 1.057226567722703292062647051353) + +#define YIQ_TO_SRGB(FROM_Y, FROM_I, FROM_Q, TO_R, TO_G, TO_B)\ + TRANSFORM((TO_R), (TO_G), (TO_B), (FROM_Y), (FROM_I), (FROM_Q),\ + 1., 0.95629483232089407263032398986979387700557708740234, 0.62102512544472865396727456754888407886028289794922,\ + 1., -0.27212147408397735492968649850809015333652496337891, -0.64738095351761570928061928498209454119205474853516,\ + 1., -1.10698990856712820018969978264067322015762329101562, 1.70461497549882934343656870623817667365074157714844) + /* ⎛1 1000 cos 33° / 877 1000 sin 33° / 877 ⎞ + ⎜1 9500 sin 33° / 24067 - 299000 * cos 33° / 514799 -9500 cos 33° / 24067 - 299000 * sin 33° / 514799⎟ + ⎝1 -250 sin 33° / 123 250 cos 33° / 123 ⎠ + */ + +#define YDBDR_TO_SRGB(FROM_Y, FROM_DB, FROM_DR, TO_R, TO_G, TO_B)\ + TRANSFORM((TO_R), (TO_G), (TO_B), (FROM_Y), (FROM_DB), (FROM_DR),\ + 1., 0.000092303716148, -0.525912630661865,\ + 1., -0.129132898890509, 0.267899328207599,\ + 1., 0.664679059978955, -0.000079202543533) + +#define YPBPR_TO_SRGB(FROM_Y, FROM_PB, FROM_PR, TO_R, TO_G, TO_B)\ + do {\ + TYPE y__ = (FROM_Y);\ + TYPE r__ = (FROM_PR) + y__;\ + TYPE b__ = (FROM_PB) + y__;\ + (TO_R) = r__;\ + (TO_B) = b__;\ + (TO_G) = (y__ - r__ * D(0.2126) - b__ * D(0.0722)) / D(0.7152);\ + } while (0) + +#define YUV_TO_SRGB(FROM_Y, FROM_U, FROM_V, TO_R, TO_G, TO_B)\ + TRANSFORM((TO_R), (TO_G), (TO_B), (FROM_Y), (FROM_U), (FROM_V),\ + 1., 0.00028328010485821202317155420580263580632163211703, 1.14070449590558520291949662350816652178764343261719,\ + 1., -0.39630886669497211727275498560629785060882568359375, -0.58107364288228224857846271333983168005943298339844,\ + 1., 2.03990003507541306504435851820744574069976806640625, 0.00017179031692307700847528739718228507626918144524) + +#define YCGCO_TO_SRGB(FROM_Y, FROM_CG, FROM_CO, TO_R, TO_G, TO_B)\ + TRANSFORM((TO_R), (TO_G), (TO_B), (FROM_Y), (FROM_CG), (FROM_CO),\ + 1., -1., 1.,\ + 1., 1., 0.,\ + 1., -1., -1.) + +#define CIEXYZ_TO_CIEXYY(FROM_X, FROM_Y, FROM_Z, TO_X, TO_Y, TO_YY)\ + do {\ + TYPE x__ = (FROM_X), y__ = (FROM_Y), z__ = (FROM_Z);\ + TYPE s__ = x__ + y__ + z__;\ + x__ = x__ / s__;\ + s__ = y__ / s__;\ + if (WASDIV0(x__) || WASDIV0(s__))\ + x__ = s__ = 0;\ + (TO_X) = x__;\ + (TO_Y) = s__;\ + (TO_YY) = y__;\ + } while (0) + +#define RGB_TO_CIEXYZ(FROM_R, FROM_G, FROM_B, TO_X, TO_Y, TO_Z, FROM_M)\ + XTRANSFORM((TO_X), (TO_Y), (TO_Z), (FROM_R), (FROM_G), (FROM_B),\ + (FROM_M)[0][0], (FROM_M)[0][1], (FROM_M)[0][2],\ + (FROM_M)[1][0], (FROM_M)[1][1], (FROM_M)[1][2],\ + (FROM_M)[2][0], (FROM_M)[2][1], (FROM_M)[2][2]) + +#define SRGB_TO_CIEXYZ(FROM_R, FROM_G, FROM_B, TO_X, TO_Y, TO_Z)\ + TRANSFORM((TO_X), (TO_Y), (TO_Z), (FROM_R), (FROM_G), (FROM_B),\ + 0.412457445582367576708548995157, 0.357575865245515878143578447634, 0.180437247826399665973085006954,\ + 0.212673370378408277403536885686, 0.715151730491031756287156895269, 0.072174899130559869164791564344,\ + 0.019333942761673460208893260415, 0.119191955081838593666354597644, 0.950302838552371742508739771438) + +#define CIEXYY_TO_CIEXYZ(FROM_X, FROM_Y, FROM_YY, TO_X, TO_Y, TO_Z)\ + do {\ + TYPE x__ = (FROM_X), y__ = (FROM_Y), Y__ = (FROM_YY);\ + TYPE Yy__ = Y__ / y__;\ + if (WASDIV0(Yy__)) {\ + (TO_X) = (TO_Y) = (TO_Z) = Y__;\ + } else {\ + (TO_X) = x__ * Yy__;\ + (TO_Y) = Y__;\ + (TO_Z) = (1 - x__ - y__) * Yy__;\ + }\ + } while (0) + +#define CIELAB_TO_CIEXYZ(FROM_L, FROM_A, FROM_B, TO_X, TO_Y, TO_Z)\ + do {\ + TYPE Y__ = ((FROM_L) + 16) / 116;\ + TYPE X__ = Y__ + (FROM_A) / 500;\ + TYPE Z__ = Y__ - (FROM_B) / 200;\ + (TO_X) = cielab_finv(X__) * D(0.95047);\ + (TO_Y) = cielab_finv(Y__);\ + (TO_Z) = cielab_finv(Z__) * D(1.08883);\ + } while (0) + +#define CIELUV_TO_CIEXYZ(FROM_L, FROM_U, FROM_V, TO_X, TO_Y, TO_Z, FROM_WHITE_X, FROM_WHITE_Y, FROM_WHITE_Z)\ + do {\ + TYPE L__ = (FROM_L), X__ = (FROM_WHITE_X), Y__ = (FROM_WHITE_Y), Z__ = (FROM_WHITE_Z);\ + TYPE L13__ = L__ * 13;\ + TYPE t__ = X__ + 15 * Y__ + 3 * Z__;\ + TYPE u__ = (FROM_U) / L13__ + 4 * X__ / t__;\ + TYPE v__ = (FROM_V) / L13__ + 9 * Y__ / t__;\ + if (L__ <= 8) {\ + Y__ *= L__ * 27 / 24389;\ + } else {\ + L__ = (L__ + 16) / 116;\ + Y__ *= L__ * L__ * L__;\ + }\ + (TO_X) = D(2.25) * Y__ * u__ / v__;\ + (TO_Y) = Y__;\ + (TO_Z) = Y__ * (3 / v__ - D(0.75) * u__ / v__ - 5);\ + } while (0) + +#define YIQ_TO_CIEXYZ(FROM_Y, FROM_I, FROM_Q, TO_X, TO_Y, TO_Z)\ + TRANSFORM((TO_X), (TO_Y), (TO_Z), (FROM_Y), (FROM_I), (FROM_Q),\ + 0.95047055865428309306963683411595411598682403564453,\ + 0.09738463974178063198294807989441324025392532348633,\ + 0.33223466706854809515903070860076695680618286132812,\ + 0.99999999999999988897769753748434595763683319091797,\ + -0.07112658301916767455974621725545148365199565887451,\ + -0.20786968876398304040264974901219829916954040527344,\ + 1.08882873639588373393394249433185905218124389648438,\ + -1.06592139332461721679123911599162966012954711914062,\ + 1.55474471255181900808395312196807935833930969238281) + +#define YDBDR_TO_CIEXYZ(FROM_Y, FROM_DB, FROM_DR, TO_X, TO_Y, TO_Z)\ + TRANSFORM((TO_X), (TO_Y), (TO_Z), (FROM_Y), (FROM_DB), (FROM_DR),\ + 0.95047055865428309306963683411595411598682403564453,\ + 0.07379612357298576119646327242662664502859115600586,\ + -0.12113653724874726136384595065464964136481285095215,\ + 0.99999999999999988897769753748434595763683319091797,\ + -0.04435684145428285540813106990754022262990474700928,\ + 0.07973534004202506575431641522300196811556816101074,\ + 1.08882873639588373393394249433185905218124389648438,\ + 0.61625657933494271123464613992837257683277130126953,\ + 0.02168821359337728266192257819966471288353204727173) + +#define YUV_TO_CIEXYZ(FROM_Y, FROM_U, FROM_V, TO_X, TO_Y, TO_Z)\ + TRANSFORM((TO_X), (TO_Y), (TO_Z), (FROM_Y), (FROM_U), (FROM_V),\ + 0.95047055865428309306963683411595411598682403564453,\ + 0.22648030324549334180161963558930438011884689331055,\ + 0.26274514929253273143316960158699657768011093139648,\ + 0.99999999999999988897769753748434595763683319091797,\ + -0.13613114642319409930415474718756740912795066833496,\ + -0.17294595255115238763288232348713790997862815856934,\ + 1.08882873639588373393394249433185905218124389648438,\ + 1.89129144197893928058817891724174842238426208496094,\ + -0.04704173528403532422714761196402832865715026855469) + +#define YPBPR_TO_CIEXYZ(FROM_Y, FROM_PB, FROM_PR, TO_X, TO_Y, TO_Z)\ + TRANSFORM((TO_X), (TO_Y), (TO_Z), (FROM_Y), (FROM_PB), (FROM_PR),\ + 0.95047055865428298204733437160030007362365722656250,\ + 0.14433968424876231217979238863335922360420227050781,\ + 0.30616461986760712399302519770571961998939514160156,\ + 0.99999999999999977795539507496869191527366638183594,\ + -0.00002022802471486617736928792510298080742359161377,\ + 0.00008771894888734421691367515450110659003257751465,\ + 1.08882873639588373393394249433185905218124389648438,\ + 0.93827031735982591165168287261622026562690734863281,\ + -0.01609699914324668607035206946420657914131879806519) + +#define YCGCO_TO_CIEXYZ(FROM_Y, FROM_CG, FROM_CO, TO_X, TO_Y, TO_Z)\ + TRANSFORM((TO_X), (TO_Y), (TO_Z), (FROM_Y), (FROM_CG), (FROM_CO),\ + 0.95047055865428309306963683411595411598682403564453,\ + -0.23531882816325136453805555447615915909409523010254,\ + 0.23202019775596791073546398820326430723071098327637,\ + 0.99999999999999988897769753748434595763683319091797,\ + 0.43030346098206362359661625305307097733020782470703,\ + 0.14049847124784842211653312915586866438388824462891,\ + 1.08882873639588373393394249433185905218124389648438,\ + -0.85044482623220662986796014592982828617095947265625,\ + -0.93096889579069830311652822274481877684593200683594) + +#define CIE1960UCS_TO_CIEXYZ(FROM_U, FROM_V, FROM_Y, TO_X, TO_Y, TO_Z)\ + do {\ + TYPE u__ = (FROM_U), v__ = (FROM_V), Y__ = (FROM_Y);\ + (TO_X) = D(1.5) * Y__ * u__ / v__;\ + (TO_Y) = Y__;\ + (TO_Z) = (4 * Y__ - Y__ * u__ - 10 * Y__ * v__) / (2 * v__);\ + } while (0) + +#define CIEXYZ_TO_CIELAB(FROM_X, FROM_Y, FROM_Z, TO_L, TO_A, TO_B)\ + do {\ + TYPE X__ = (FROM_X), Y__ = (FROM_Y), Z__ = (FROM_Z);\ + X__ /= D(0.95047);\ + Z__ /= D(1.08883);\ + Y__ = cielab_f(Y__);\ + (TO_L) = 116 * Y__ - 16;\ + (TO_A) = 500 * (cielab_f(X__) - Y__);\ + (TO_B) = 200 * (Y__ - cielab_f(Z__));\ + } while (0) + +#define CIEXYZ_TO_CIELUV(FROM_X, FROM_Y, FROM_Z, TO_L, TO_U, TO_V, TO_WHITE_X, TO_WHITE_Y, TO_WHITE_Z)\ + do {\ + TYPE WX__ = (TO_WHITE_X), WY__ = (TO_WHITE_Y), WZ__ = (TO_WHITE_Z);\ + TYPE X__ = (FROM_X), Y__ = (FROM_Y), Z__ = (FROM_Z);\ + TYPE L2__, L__, u__, v__, t__;\ + t__ = WX__ + 15 * WY__ + 3 * WZ__;\ + u__ = 4 * WX__ / t__;\ + v__ = 9 * WY__ / t__;\ + t__ = X__ + 15 * Y__ + 3 * Z__;\ + u__ = 4 * X__ / t__ - u__;\ + v__ = 9 * Y__ / t__ - v__;\ + L__ = Y__ / WY__;\ + L2__ = L__ * 24389;\ + L__ = L2__ <= 216 ? L2__ / 27 : xcbrt(L__) * 116 - 16;\ + (TO_L) = L__;\ + L__ *= 13;\ + (TO_U) = u__ * L__;\ + (TO_V) = v__ * L__;\ + } while (0) + +#define CIELCHUV_TO_CIELUV(FROM_L, FROM_C, FROM_H, TO_L, TO_U, TO_V)\ + do {\ + TYPE C__ = (FROM_C), h__ = (FROM_H);\ + (TO_L) = (FROM_L);\ + (TO_U) = C__ * xcos(h__);\ + (TO_V) = C__ * xsin(h__);\ + } while (0) + +#define CIELUV_TO_CIELCHUV(FROM_L, FROM_U, FROM_V, TO_L, TO_C, TO_H, TO_ONE_REVOLUTION)\ + do {\ + TYPE u__ = (FROM_U), v__ = (FROM_V), rev__ = (TO_ONE_REVOLUTION), h__;\ + (TO_L) = (FROM_L);\ + (TO_C) = xsqrt(u__ * u__ + v__ * v__);\ + h__ = xatan2(v__, u__) / PI2 * rev__;\ + if (!WASDIV0(h__) && (h__ < 0))\ + h__ += rev__;\ + (TO_H) = h__;\ + } while (0) + +#define SRGB_TO_YIQ(FROM_R, FROM_G, FROM_B, TO_Y, TO_I, TO_Q)\ + TRANSFORM((TO_Y), (TO_I), (TO_Q), (FROM_R), (FROM_G), (FROM_B),\ + 0.299, 0.587, 0.114,\ + 0.59571613491277464191853141528554260730743408203125, /* (0.877 cos 33°)(1 - 0.299) - (0.492 sin 33°)(-0.299) */\ + -0.27445283783925644716106262421817518770694732666016, /* (0.877 cos 33°)(-0.587) - (0.492 sin 33°)(-0.587) */\ + -0.32126329707351808373516632855171337723731994628906, /* (0.877 cos 33°)(-0.114) - (0.492 sin 33°)(1 - 0.114) */\ + 0.21145640212011795888713550084503367543220520019531, /* (0.877 sin 33°)(1 - 0.299) + (0.492 cos 33°)(-0.299) */\ + -0.52259104529161115593183239980135113000869750976562, /* (0.877 sin 33°)(-0.587) + (0.492 cos 33°)(-0.587) */\ + 0.31113464317149330806699936147197149693965911865234) /* (0.877 sin 33°)(-0.114) + (0.492 cos 33°)(1 - 0.114) */ + +#define CIEXYZ_TO_YIQ(FROM_X, FROM_Y, FROM_Z, TO_Y, TO_I, TO_Q)\ + TRANSFORM((TO_Y), (TO_I), (TO_Q), (FROM_X), (FROM_Y), (FROM_Z),\ + 0.40627729168038273499519164033699780702590942382812,\ + 0.61835674212166968910509012857801280915737152099609,\ + -0.00414330221353725880462093300593551248311996459961,\ + 2.17852787350219845308174626552499830722808837890625,\ + -1.36502666214454104753883711964590474963188171386719,\ + -0.64803574634025240541745915834326297044754028320312,\ + 1.20905577682138853923277110880007967352867126464844,\ + -1.36890364998339797431015085749095305800437927246094,\ + 0.20180559439597040016778350945969577878713607788086) + +#define SRGB_TO_YDBDR(FROM_R, FROM_G, FROM_B, TO_Y, TO_DB, TO_DR)\ + TRANSFORM((TO_Y), (TO_DB), (TO_DR), (FROM_R), (FROM_G), (FROM_B),\ + 0.299, 0.587, 0.114,\ + -0.450, -0.883, 1.333,\ + -1.333, 1.116, 0.217) + +#define YUV_TO_YDBDR(FROM_Y, FROM_U, FROM_V, TO_Y, TO_DB, TO_DR)\ + do {\ + (TO_Y) = (FROM_Y);\ + (TO_DB) = (FROM_U) * D(3.069);\ + (TO_DR) = (FROM_V) * D(-2.169);\ + } while (0) + +#define CIEXYZ_TO_YDBDR(FROM_X, FROM_Y, FROM_Z, TO_Y, TO_DB, TO_DR)\ + TRANSFORM((TO_Y), (TO_DB), (TO_DR), (FROM_X), (FROM_Y), (FROM_Z),\ + 0.40627729168038273499519164033699780702590942382812,\ + 0.61835674212166968910509012857801280915737152099609,\ + -0.00414330221353725880462093300593551248311996459961,\ + -0.52816561102614745237815441214479506015777587890625,\ + -1.23677481526212962315014465275453403592109680175781,\ + 1.59692761635924940222253098909277468919754028320312,\ + -5.38914174974103143966885909321717917919158935546875,\ + 4.09835630362728497999569299281574785709381103515625,\ + 0.94033545560642795013706063400604762136936187744141) + +#define YDBDR_TO_YUV(FROM_Y, FROM_DB, FROM_DR, TO_Y, TO_U, TO_V)\ + do {\ + (TO_Y) = (FROM_Y);\ + (TO_U) = (FROM_DB) / D(3.069);\ + (TO_V) = (FROM_DR) / D(-2.169);\ + } while (0) + +#define SRGB_TO_YUV(FROM_R, FROM_G, FROM_B, TO_Y, TO_U, TO_V)\ + TRANSFORM((TO_Y), (TO_U), (TO_V), (FROM_R), (FROM_G), (FROM_B),\ + 0.29899999999999998800959133404830936342477798461914,\ + 0.58699999999999996624922005139524117112159729003906,\ + 0.11400000000000000410782519111307919956743717193604,\ + -0.14662756598240470062854967636667424812912940979004,\ + -0.28771586836102963635752871596196200698614120483398,\ + 0.43434343434343436474165400795754976570606231689453,\ + 0.61456892577224520035628074765554629266262054443359,\ + -0.51452282157676354490405401520547457039356231689453,\ + -0.10004610419548178035231700278018251992762088775635) + +#define CIEXYZ_TO_YUV(FROM_X, FROM_Y, FROM_Z, TO_Y, TO_U, TO_V)\ + TRANSFORM((TO_Y), (TO_U), (TO_V), (FROM_X), (FROM_Y), (FROM_Z),\ + 0.40627729168038273499519164033699780702590942382812,\ + 0.61835674212166968910509012857801280915737152099609,\ + -0.00414330221353725880462093300593551248311996459961,\ + -0.17209697328971895746718701047939248383045196533203,\ + -0.40298951295605395239718404809536878019571304321289,\ + 0.52034135430408912093014350830344483256340026855469,\ + 2.48462044709130047692724474472925066947937011718750,\ + -1.88951420176453876997868519538315013051033020019531,\ + -0.43353409663735725798616726933687459677457809448242) + +#define SRGB_TO_YPBPR(FROM_R, FROM_G, FROM_B, TO_Y, TO_PB, TO_PR)\ + do {\ + TYPE R__ = (FROM_R), G__ = (FROM_G), B__ = (FROM_B);\ + (TO_Y) = R__ * D(0.2126) +\ + G__ * D(0.7152) +\ + B__ * D(0.0722);\ + (TO_PB) = B__ - to->Y;\ + (TO_PR) = R__ - to->Y;\ + } while (0) + +#define CIEXYZ_TO_YPBPR(FROM_X, FROM_Y, FROM_Z, TO_Y, TO_PB, TO_PR)\ + TRANSFORM((TO_Y), (TO_PB), (TO_PR), (FROM_X), (FROM_Y), (FROM_Z),\ + -0.00028314209073960778378920011277841695118695497513,\ + 1.00019821310075673892470149439759552478790283203125,\ + 0.00006512054470741990286342115723527967929840087891,\ + 0.05592664565509243568275365987574332393705844879150,\ + -1.20422439283671711685030913940863683819770812988281,\ + 1.05716144717799576113748116767965257167816162109375,\ + 3.24072939673847715269516811531502753496170043945312,\ + -2.53733297492083753610359053709544241428375244140625,\ + -0.49859531356743613805804216099204495549201965332031) + +#define SRGB_TO_YCGCO(FROM_R, FROM_G, FROM_B, TO_Y, TO_CG, TO_CO)\ + TRANSFORM((TO_Y), (TO_CG), (TO_CO), (FROM_R), (FROM_G), (FROM_B),\ + 0.25, 0.50, 0.25,\ + -0.25, 0.50, -0.25,\ + 0.50, 0., -0.50) + +#define CIEXYZ_TO_YCGCO(FROM_X, FROM_Y, FROM_Z, TO_Y, TO_CG, TO_CO)\ + TRANSFORM((TO_Y), (TO_CG), (TO_CO), (FROM_X), (FROM_Y), (FROM_Z),\ + 0.33938913643068269188063368346774950623512268066406,\ + 0.50271574450517486631895280879689380526542663574219,\ + 0.16045211478220866574417868832824751734733581542969,\ + -1.30865574267536244335019546269904822111129760742188,\ + 1.37329621528319534284889869013568386435508728027344,\ + -0.11889607256777862120955546743061859160661697387695,\ + 1.59240137554169236544510113162687048316001892089844,\ + -0.66655429104206020962664069884340278804302215576172,\ + -0.77787838037271606062006412685150280594825744628906) + +#define CIEUVW_TO_CIE1960UCS(FROM_U, FROM_V, FROM_W, TO_U, TO_V, TO_Y, FROM_U0, FROM_V0)\ + do {\ + TYPE U__ = (FROM_U), V__ = (FROM_V), W__ = (FROM_W), Y__;\ + Y__ = (W__ + 17) / 25;\ + Y__ *= Y__ * Y__;\ + W__ *= 13;\ + (TO_U) = U__ / W__ + (FROM_U0);\ + (TO_V) = V__ / W__ + (FROM_V0);\ + (TO_Y) = Y__;\ + } while (0) + +#define CIEXYZ_TO_CIE1960UCS(FROM_X, FROM_Y, FROM_Z, TO_U, TO_V, TO_Y)\ + do {\ + TYPE X__ = (FROM_X), Y__ = (FROM_Y), w__;\ + w__ = X__ + 15 * Y__ + 3 * (FROM_Z);\ + (TO_U) = 4 * X__ / w__;\ + (TO_V) = 6 * Y__ / w__;\ + (TO_Y) = Y__;\ + } while (0) + +#define CIEUVW_TO_CIEUVW(FROM_U, FROM_V, FROM_W, TO_U, TO_V, TO_W, FROM_U0, FROM_V0, TO_U0, TO_V0)\ + do {\ + TYPE U__ = (FROM_U), V__ = (FROM_V), W__ = (FROM_W);\ + TYPE w__ = W__ * 13;\ + U__ += w__ * ((FROM_U0) - (TO_U0));\ + V__ += w__ * ((FROM_V0) - (TO_V0));\ + (TO_U) = U__;\ + (TO_V) = V__;\ + (TO_W) = W__;\ + } while (0) + +#define CIE1960UCS_TO_CIEUVW(FROM_U, FROM_V, FROM_Y, TO_U, TO_V, TO_W, TO_U0, TO_V0)\ + do {\ + TYPE Y__ = 25 * xcbrt((FROM_Y)) - 17;\ + TYPE w__ = Y__ * 13;\ + to->U = w__ * ((FROM_U) - (TO_U0));\ + to->V = w__ * ((FROM_V) - (TO_V0));\ + to->W = Y__;\ + } while (0) + + + +static inline TYPE +srgb_encode(TYPE t) +{ + TYPE sign = 1; + if (t < 0) { + t = -t; + sign = -1; + } + t = t <= D(0.0031306684425217108) ? D(12.92) * t + : D(1.055) * xpow(t, 1 / D(2.4)) - D(0.055); + return t * sign; +} + +static inline TYPE +srgb_decode(TYPE t) +{ + TYPE sign = 1; + if (t < 0) { + t = -t; + sign = -1; + } + t = t <= D(0.0031306684425217108) * D(12.92) ? t / D(12.92) + : xpow((t + D(0.055)) / D(1.055), D(2.4)); + return t * sign; +} + +static inline TYPE +cielab_finv(TYPE t) +{ + return (t > D(6.) / D(29.)) ? t * t * t : (t - D(4.) / D(29.)) * 108 / 841; +} + +static inline TYPE +cielab_f(TYPE t) +{ + return (t > D(216.) / D(24389.)) ? xcbrt(t) : t * D(841.) / D(108.) + D(4.) / D(29.); +} |