diff options
Diffstat (limited to 'core/src/fxcodec/lcms2/lcms2-2.6/src/cmspcs.c')
| -rw-r--r-- | core/src/fxcodec/lcms2/lcms2-2.6/src/cmspcs.c | 931 |
1 files changed, 0 insertions, 931 deletions
diff --git a/core/src/fxcodec/lcms2/lcms2-2.6/src/cmspcs.c b/core/src/fxcodec/lcms2/lcms2-2.6/src/cmspcs.c deleted file mode 100644 index 102cd7d21e..0000000000 --- a/core/src/fxcodec/lcms2/lcms2-2.6/src/cmspcs.c +++ /dev/null @@ -1,931 +0,0 @@ -//--------------------------------------------------------------------------------- -// -// Little Color Management System -// Copyright (c) 1998-2010 Marti Maria Saguer -// -// Permission is hereby granted, free of charge, to any person obtaining -// a copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the Software -// is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO -// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE -// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -// -//--------------------------------------------------------------------------------- -// - -#include "lcms2_internal.h" - -// inter PCS conversions XYZ <-> CIE L* a* b* -/* - - - CIE 15:2004 CIELab is defined as: - - L* = 116*f(Y/Yn) - 16 0 <= L* <= 100 - a* = 500*[f(X/Xn) - f(Y/Yn)] - b* = 200*[f(Y/Yn) - f(Z/Zn)] - - and - - f(t) = t^(1/3) 1 >= t > (24/116)^3 - (841/108)*t + (16/116) 0 <= t <= (24/116)^3 - - - Reverse transform is: - - X = Xn*[a* / 500 + (L* + 16) / 116] ^ 3 if (X/Xn) > (24/116) - = Xn*(a* / 500 + L* / 116) / 7.787 if (X/Xn) <= (24/116) - - - - PCS in Lab2 is encoded as: - - 8 bit Lab PCS: - - L* 0..100 into a 0..ff byte. - a* t + 128 range is -128.0 +127.0 - b* - - 16 bit Lab PCS: - - L* 0..100 into a 0..ff00 word. - a* t + 128 range is -128.0 +127.9961 - b* - - - -Interchange Space Component Actual Range Encoded Range -CIE XYZ X 0 -> 1.99997 0x0000 -> 0xffff -CIE XYZ Y 0 -> 1.99997 0x0000 -> 0xffff -CIE XYZ Z 0 -> 1.99997 0x0000 -> 0xffff - -Version 2,3 ------------ - -CIELAB (16 bit) L* 0 -> 100.0 0x0000 -> 0xff00 -CIELAB (16 bit) a* -128.0 -> +127.996 0x0000 -> 0x8000 -> 0xffff -CIELAB (16 bit) b* -128.0 -> +127.996 0x0000 -> 0x8000 -> 0xffff - - -Version 4 ---------- - -CIELAB (16 bit) L* 0 -> 100.0 0x0000 -> 0xffff -CIELAB (16 bit) a* -128.0 -> +127 0x0000 -> 0x8080 -> 0xffff -CIELAB (16 bit) b* -128.0 -> +127 0x0000 -> 0x8080 -> 0xffff - -*/ - -// Conversions -void CMSEXPORT cmsXYZ2xyY(cmsCIExyY* Dest, const cmsCIEXYZ* Source) -{ - cmsFloat64Number ISum; - - ISum = 1./(Source -> X + Source -> Y + Source -> Z); - - Dest -> x = (Source -> X) * ISum; - Dest -> y = (Source -> Y) * ISum; - Dest -> Y = Source -> Y; -} - -void CMSEXPORT cmsxyY2XYZ(cmsCIEXYZ* Dest, const cmsCIExyY* Source) -{ - Dest -> X = (Source -> x / Source -> y) * Source -> Y; - Dest -> Y = Source -> Y; - Dest -> Z = ((1 - Source -> x - Source -> y) / Source -> y) * Source -> Y; -} - -static -cmsFloat64Number f(cmsFloat64Number t) -{ - const cmsFloat64Number Limit = (24.0/116.0) * (24.0/116.0) * (24.0/116.0); - - if (t <= Limit) - return (841.0/108.0) * t + (16.0/116.0); - else - return pow(t, 1.0/3.0); -} - -static -cmsFloat64Number f_1(cmsFloat64Number t) -{ - const cmsFloat64Number Limit = (24.0/116.0); - - if (t <= Limit) { - return (108.0/841.0) * (t - (16.0/116.0)); - } - - return t * t * t; -} - - -// Standard XYZ to Lab. it can handle negative XZY numbers in some cases -void CMSEXPORT cmsXYZ2Lab(const cmsCIEXYZ* WhitePoint, cmsCIELab* Lab, const cmsCIEXYZ* xyz) -{ - cmsFloat64Number fx, fy, fz; - - if (WhitePoint == NULL) - WhitePoint = cmsD50_XYZ(); - - fx = f(xyz->X / WhitePoint->X); - fy = f(xyz->Y / WhitePoint->Y); - fz = f(xyz->Z / WhitePoint->Z); - - Lab->L = 116.0*fy - 16.0; - Lab->a = 500.0*(fx - fy); - Lab->b = 200.0*(fy - fz); -} - - -// Standard XYZ to Lab. It can return negative XYZ in some cases -void CMSEXPORT cmsLab2XYZ(const cmsCIEXYZ* WhitePoint, cmsCIEXYZ* xyz, const cmsCIELab* Lab) -{ - cmsFloat64Number x, y, z; - - if (WhitePoint == NULL) - WhitePoint = cmsD50_XYZ(); - - y = (Lab-> L + 16.0) / 116.0; - x = y + 0.002 * Lab -> a; - z = y - 0.005 * Lab -> b; - - xyz -> X = f_1(x) * WhitePoint -> X; - xyz -> Y = f_1(y) * WhitePoint -> Y; - xyz -> Z = f_1(z) * WhitePoint -> Z; - -} - -static -cmsFloat64Number L2float2(cmsUInt16Number v) -{ - return (cmsFloat64Number) v / 652.800; -} - -// the a/b part -static -cmsFloat64Number ab2float2(cmsUInt16Number v) -{ - return ((cmsFloat64Number) v / 256.0) - 128.0; -} - -static -cmsUInt16Number L2Fix2(cmsFloat64Number L) -{ - return _cmsQuickSaturateWord(L * 652.8); -} - -static -cmsUInt16Number ab2Fix2(cmsFloat64Number ab) -{ - return _cmsQuickSaturateWord((ab + 128.0) * 256.0); -} - - -static -cmsFloat64Number L2float4(cmsUInt16Number v) -{ - return (cmsFloat64Number) v / 655.35; -} - -// the a/b part -static -cmsFloat64Number ab2float4(cmsUInt16Number v) -{ - return ((cmsFloat64Number) v / 257.0) - 128.0; -} - - -void CMSEXPORT cmsLabEncoded2FloatV2(cmsCIELab* Lab, const cmsUInt16Number wLab[3]) -{ - Lab->L = L2float2(wLab[0]); - Lab->a = ab2float2(wLab[1]); - Lab->b = ab2float2(wLab[2]); -} - - -void CMSEXPORT cmsLabEncoded2Float(cmsCIELab* Lab, const cmsUInt16Number wLab[3]) -{ - Lab->L = L2float4(wLab[0]); - Lab->a = ab2float4(wLab[1]); - Lab->b = ab2float4(wLab[2]); -} - -static -cmsFloat64Number Clamp_L_doubleV2(cmsFloat64Number L) -{ - const cmsFloat64Number L_max = (cmsFloat64Number) (0xFFFF * 100.0) / 0xFF00; - - if (L < 0) L = 0; - if (L > L_max) L = L_max; - - return L; -} - - -static -cmsFloat64Number Clamp_ab_doubleV2(cmsFloat64Number ab) -{ - if (ab < MIN_ENCODEABLE_ab2) ab = MIN_ENCODEABLE_ab2; - if (ab > MAX_ENCODEABLE_ab2) ab = MAX_ENCODEABLE_ab2; - - return ab; -} - -void CMSEXPORT cmsFloat2LabEncodedV2(cmsUInt16Number wLab[3], const cmsCIELab* fLab) -{ - cmsCIELab Lab; - - Lab.L = Clamp_L_doubleV2(fLab ->L); - Lab.a = Clamp_ab_doubleV2(fLab ->a); - Lab.b = Clamp_ab_doubleV2(fLab ->b); - - wLab[0] = L2Fix2(Lab.L); - wLab[1] = ab2Fix2(Lab.a); - wLab[2] = ab2Fix2(Lab.b); -} - - -static -cmsFloat64Number Clamp_L_doubleV4(cmsFloat64Number L) -{ - if (L < 0) L = 0; - if (L > 100.0) L = 100.0; - - return L; -} - -static -cmsFloat64Number Clamp_ab_doubleV4(cmsFloat64Number ab) -{ - if (ab < MIN_ENCODEABLE_ab4) ab = MIN_ENCODEABLE_ab4; - if (ab > MAX_ENCODEABLE_ab4) ab = MAX_ENCODEABLE_ab4; - - return ab; -} - -static -cmsUInt16Number L2Fix4(cmsFloat64Number L) -{ - return _cmsQuickSaturateWord(L * 655.35); -} - -static -cmsUInt16Number ab2Fix4(cmsFloat64Number ab) -{ - return _cmsQuickSaturateWord((ab + 128.0) * 257.0); -} - -void CMSEXPORT cmsFloat2LabEncoded(cmsUInt16Number wLab[3], const cmsCIELab* fLab) -{ - cmsCIELab Lab; - - Lab.L = Clamp_L_doubleV4(fLab ->L); - Lab.a = Clamp_ab_doubleV4(fLab ->a); - Lab.b = Clamp_ab_doubleV4(fLab ->b); - - wLab[0] = L2Fix4(Lab.L); - wLab[1] = ab2Fix4(Lab.a); - wLab[2] = ab2Fix4(Lab.b); -} - -// Auxiliar: convert to Radians -static -cmsFloat64Number RADIANS(cmsFloat64Number deg) -{ - return (deg * M_PI) / 180.; -} - - -// Auxiliar: atan2 but operating in degrees and returning 0 if a==b==0 -static -cmsFloat64Number atan2deg(cmsFloat64Number a, cmsFloat64Number b) -{ - cmsFloat64Number h; - - if (a == 0 && b == 0) - h = 0; - else - h = atan2(a, b); - - h *= (180. / M_PI); - - while (h > 360.) - h -= 360.; - - while ( h < 0) - h += 360.; - - return h; -} - - -// Auxiliar: Square -static -cmsFloat64Number Sqr(cmsFloat64Number v) -{ - return v * v; -} -// From cylindrical coordinates. No check is performed, then negative values are allowed -void CMSEXPORT cmsLab2LCh(cmsCIELCh* LCh, const cmsCIELab* Lab) -{ - LCh -> L = Lab -> L; - LCh -> C = pow(Sqr(Lab ->a) + Sqr(Lab ->b), 0.5); - LCh -> h = atan2deg(Lab ->b, Lab ->a); -} - - -// To cylindrical coordinates. No check is performed, then negative values are allowed -void CMSEXPORT cmsLCh2Lab(cmsCIELab* Lab, const cmsCIELCh* LCh) -{ - cmsFloat64Number h = (LCh -> h * M_PI) / 180.0; - - Lab -> L = LCh -> L; - Lab -> a = LCh -> C * cos(h); - Lab -> b = LCh -> C * sin(h); -} - -// In XYZ All 3 components are encoded using 1.15 fixed point -static -cmsUInt16Number XYZ2Fix(cmsFloat64Number d) -{ - return _cmsQuickSaturateWord(d * 32768.0); -} - -void CMSEXPORT cmsFloat2XYZEncoded(cmsUInt16Number XYZ[3], const cmsCIEXYZ* fXYZ) -{ - cmsCIEXYZ xyz; - - xyz.X = fXYZ -> X; - xyz.Y = fXYZ -> Y; - xyz.Z = fXYZ -> Z; - - // Clamp to encodeable values. - if (xyz.Y <= 0) { - - xyz.X = 0; - xyz.Y = 0; - xyz.Z = 0; - } - - if (xyz.X > MAX_ENCODEABLE_XYZ) - xyz.X = MAX_ENCODEABLE_XYZ; - - if (xyz.X < 0) - xyz.X = 0; - - if (xyz.Y > MAX_ENCODEABLE_XYZ) - xyz.Y = MAX_ENCODEABLE_XYZ; - - if (xyz.Y < 0) - xyz.Y = 0; - - if (xyz.Z > MAX_ENCODEABLE_XYZ) - xyz.Z = MAX_ENCODEABLE_XYZ; - - if (xyz.Z < 0) - xyz.Z = 0; - - - XYZ[0] = XYZ2Fix(xyz.X); - XYZ[1] = XYZ2Fix(xyz.Y); - XYZ[2] = XYZ2Fix(xyz.Z); -} - - -// To convert from Fixed 1.15 point to cmsFloat64Number -static -cmsFloat64Number XYZ2float(cmsUInt16Number v) -{ - cmsS15Fixed16Number fix32; - - // From 1.15 to 15.16 - fix32 = v << 1; - - // From fixed 15.16 to cmsFloat64Number - return _cms15Fixed16toDouble(fix32); -} - - -void CMSEXPORT cmsXYZEncoded2Float(cmsCIEXYZ* fXYZ, const cmsUInt16Number XYZ[3]) -{ - fXYZ -> X = XYZ2float(XYZ[0]); - fXYZ -> Y = XYZ2float(XYZ[1]); - fXYZ -> Z = XYZ2float(XYZ[2]); -} - - -// Returns dE on two Lab values -cmsFloat64Number CMSEXPORT cmsDeltaE(const cmsCIELab* Lab1, const cmsCIELab* Lab2) -{ - cmsFloat64Number dL, da, db; - - dL = fabs(Lab1 -> L - Lab2 -> L); - da = fabs(Lab1 -> a - Lab2 -> a); - db = fabs(Lab1 -> b - Lab2 -> b); - - return pow(Sqr(dL) + Sqr(da) + Sqr(db), 0.5); -} - - -// Return the CIE94 Delta E -cmsFloat64Number CMSEXPORT cmsCIE94DeltaE(const cmsCIELab* Lab1, const cmsCIELab* Lab2) -{ - cmsCIELCh LCh1, LCh2; - cmsFloat64Number dE, dL, dC, dh, dhsq; - cmsFloat64Number c12, sc, sh; - - dL = fabs(Lab1 ->L - Lab2 ->L); - - cmsLab2LCh(&LCh1, Lab1); - cmsLab2LCh(&LCh2, Lab2); - - dC = fabs(LCh1.C - LCh2.C); - dE = cmsDeltaE(Lab1, Lab2); - - dhsq = Sqr(dE) - Sqr(dL) - Sqr(dC); - if (dhsq < 0) - dh = 0; - else - dh = pow(dhsq, 0.5); - - c12 = sqrt(LCh1.C * LCh2.C); - - sc = 1.0 + (0.048 * c12); - sh = 1.0 + (0.014 * c12); - - return sqrt(Sqr(dL) + Sqr(dC) / Sqr(sc) + Sqr(dh) / Sqr(sh)); -} - - -// Auxiliary -static -cmsFloat64Number ComputeLBFD(const cmsCIELab* Lab) -{ - cmsFloat64Number yt; - - if (Lab->L > 7.996969) - yt = (Sqr((Lab->L+16)/116)*((Lab->L+16)/116))*100; - else - yt = 100 * (Lab->L / 903.3); - - return (54.6 * (M_LOG10E * (log(yt + 1.5))) - 9.6); -} - - - -// bfd - gets BFD(1:1) difference between Lab1, Lab2 -cmsFloat64Number CMSEXPORT cmsBFDdeltaE(const cmsCIELab* Lab1, const cmsCIELab* Lab2) -{ - cmsFloat64Number lbfd1,lbfd2,AveC,Aveh,dE,deltaL, - deltaC,deltah,dc,t,g,dh,rh,rc,rt,bfd; - cmsCIELCh LCh1, LCh2; - - - lbfd1 = ComputeLBFD(Lab1); - lbfd2 = ComputeLBFD(Lab2); - deltaL = lbfd2 - lbfd1; - - cmsLab2LCh(&LCh1, Lab1); - cmsLab2LCh(&LCh2, Lab2); - - deltaC = LCh2.C - LCh1.C; - AveC = (LCh1.C+LCh2.C)/2; - Aveh = (LCh1.h+LCh2.h)/2; - - dE = cmsDeltaE(Lab1, Lab2); - - if (Sqr(dE)>(Sqr(Lab2->L-Lab1->L)+Sqr(deltaC))) - deltah = sqrt(Sqr(dE)-Sqr(Lab2->L-Lab1->L)-Sqr(deltaC)); - else - deltah =0; - - - dc = 0.035 * AveC / (1 + 0.00365 * AveC)+0.521; - g = sqrt(Sqr(Sqr(AveC))/(Sqr(Sqr(AveC))+14000)); - t = 0.627+(0.055*cos((Aveh-254)/(180/M_PI))- - 0.040*cos((2*Aveh-136)/(180/M_PI))+ - 0.070*cos((3*Aveh-31)/(180/M_PI))+ - 0.049*cos((4*Aveh+114)/(180/M_PI))- - 0.015*cos((5*Aveh-103)/(180/M_PI))); - - dh = dc*(g*t+1-g); - rh = -0.260*cos((Aveh-308)/(180/M_PI))- - 0.379*cos((2*Aveh-160)/(180/M_PI))- - 0.636*cos((3*Aveh+254)/(180/M_PI))+ - 0.226*cos((4*Aveh+140)/(180/M_PI))- - 0.194*cos((5*Aveh+280)/(180/M_PI)); - - rc = sqrt((AveC*AveC*AveC*AveC*AveC*AveC)/((AveC*AveC*AveC*AveC*AveC*AveC)+70000000)); - rt = rh*rc; - - bfd = sqrt(Sqr(deltaL)+Sqr(deltaC/dc)+Sqr(deltah/dh)+(rt*(deltaC/dc)*(deltah/dh))); - - return bfd; -} - - -// cmc - CMC(l:c) difference between Lab1, Lab2 -cmsFloat64Number CMSEXPORT cmsCMCdeltaE(const cmsCIELab* Lab1, const cmsCIELab* Lab2, cmsFloat64Number l, cmsFloat64Number c) -{ - cmsFloat64Number dE,dL,dC,dh,sl,sc,sh,t,f,cmc; - cmsCIELCh LCh1, LCh2; - - if (Lab1 ->L == 0 && Lab2 ->L == 0) return 0; - - cmsLab2LCh(&LCh1, Lab1); - cmsLab2LCh(&LCh2, Lab2); - - - dL = Lab2->L-Lab1->L; - dC = LCh2.C-LCh1.C; - - dE = cmsDeltaE(Lab1, Lab2); - - if (Sqr(dE)>(Sqr(dL)+Sqr(dC))) - dh = sqrt(Sqr(dE)-Sqr(dL)-Sqr(dC)); - else - dh =0; - - if ((LCh1.h > 164) && (LCh1.h < 345)) - t = 0.56 + fabs(0.2 * cos(((LCh1.h + 168)/(180/M_PI)))); - else - t = 0.36 + fabs(0.4 * cos(((LCh1.h + 35 )/(180/M_PI)))); - - sc = 0.0638 * LCh1.C / (1 + 0.0131 * LCh1.C) + 0.638; - sl = 0.040975 * Lab1->L /(1 + 0.01765 * Lab1->L); - - if (Lab1->L<16) - sl = 0.511; - - f = sqrt((LCh1.C * LCh1.C * LCh1.C * LCh1.C)/((LCh1.C * LCh1.C * LCh1.C * LCh1.C)+1900)); - sh = sc*(t*f+1-f); - cmc = sqrt(Sqr(dL/(l*sl))+Sqr(dC/(c*sc))+Sqr(dh/sh)); - - return cmc; -} - -// dE2000 The weightings KL, KC and KH can be modified to reflect the relative -// importance of lightness, chroma and hue in different industrial applications -cmsFloat64Number CMSEXPORT cmsCIE2000DeltaE(const cmsCIELab* Lab1, const cmsCIELab* Lab2, - cmsFloat64Number Kl, cmsFloat64Number Kc, cmsFloat64Number Kh) -{ - cmsFloat64Number L1 = Lab1->L; - cmsFloat64Number a1 = Lab1->a; - cmsFloat64Number b1 = Lab1->b; - cmsFloat64Number C = sqrt( Sqr(a1) + Sqr(b1) ); - - cmsFloat64Number Ls = Lab2 ->L; - cmsFloat64Number as = Lab2 ->a; - cmsFloat64Number bs = Lab2 ->b; - cmsFloat64Number Cs = sqrt( Sqr(as) + Sqr(bs) ); - - cmsFloat64Number G = 0.5 * ( 1 - sqrt(pow((C + Cs) / 2 , 7.0) / (pow((C + Cs) / 2, 7.0) + pow(25.0, 7.0) ) )); - - cmsFloat64Number a_p = (1 + G ) * a1; - cmsFloat64Number b_p = b1; - cmsFloat64Number C_p = sqrt( Sqr(a_p) + Sqr(b_p)); - cmsFloat64Number h_p = atan2deg(b_p, a_p); - - - cmsFloat64Number a_ps = (1 + G) * as; - cmsFloat64Number b_ps = bs; - cmsFloat64Number C_ps = sqrt(Sqr(a_ps) + Sqr(b_ps)); - cmsFloat64Number h_ps = atan2deg(b_ps, a_ps); - - cmsFloat64Number meanC_p =(C_p + C_ps) / 2; - - cmsFloat64Number hps_plus_hp = h_ps + h_p; - cmsFloat64Number hps_minus_hp = h_ps - h_p; - - cmsFloat64Number meanh_p = fabs(hps_minus_hp) <= 180.000001 ? (hps_plus_hp)/2 : - (hps_plus_hp) < 360 ? (hps_plus_hp + 360)/2 : - (hps_plus_hp - 360)/2; - - cmsFloat64Number delta_h = (hps_minus_hp) <= -180.000001 ? (hps_minus_hp + 360) : - (hps_minus_hp) > 180 ? (hps_minus_hp - 360) : - (hps_minus_hp); - cmsFloat64Number delta_L = (Ls - L1); - cmsFloat64Number delta_C = (C_ps - C_p ); - - - cmsFloat64Number delta_H =2 * sqrt(C_ps*C_p) * sin(RADIANS(delta_h) / 2); - - cmsFloat64Number T = 1 - 0.17 * cos(RADIANS(meanh_p-30)) - + 0.24 * cos(RADIANS(2*meanh_p)) - + 0.32 * cos(RADIANS(3*meanh_p + 6)) - - 0.2 * cos(RADIANS(4*meanh_p - 63)); - - cmsFloat64Number Sl = 1 + (0.015 * Sqr((Ls + L1) /2- 50) )/ sqrt(20 + Sqr( (Ls+L1)/2 - 50) ); - - cmsFloat64Number Sc = 1 + 0.045 * (C_p + C_ps)/2; - cmsFloat64Number Sh = 1 + 0.015 * ((C_ps + C_p)/2) * T; - - cmsFloat64Number delta_ro = 30 * exp( -Sqr(((meanh_p - 275 ) / 25))); - - cmsFloat64Number Rc = 2 * sqrt(( pow(meanC_p, 7.0) )/( pow(meanC_p, 7.0) + pow(25.0, 7.0))); - - cmsFloat64Number Rt = -sin(2 * RADIANS(delta_ro)) * Rc; - - cmsFloat64Number deltaE00 = sqrt( Sqr(delta_L /(Sl * Kl)) + - Sqr(delta_C/(Sc * Kc)) + - Sqr(delta_H/(Sh * Kh)) + - Rt*(delta_C/(Sc * Kc)) * (delta_H / (Sh * Kh))); - - return deltaE00; -} - -// This function returns a number of gridpoints to be used as LUT table. It assumes same number -// of gripdpoints in all dimensions. Flags may override the choice. -int _cmsReasonableGridpointsByColorspace(cmsColorSpaceSignature Colorspace, cmsUInt32Number dwFlags) -{ - int nChannels; - - // Already specified? - if (dwFlags & 0x00FF0000) { - // Yes, grab'em - return (dwFlags >> 16) & 0xFF; - } - - nChannels = cmsChannelsOf(Colorspace); - - // HighResPrecalc is maximum resolution - if (dwFlags & cmsFLAGS_HIGHRESPRECALC) { - - if (nChannels > 4) - return 7; // 7 for Hifi - - if (nChannels == 4) // 23 for CMYK - return 23; - - return 49; // 49 for RGB and others - } - - - // LowResPrecal is lower resolution - if (dwFlags & cmsFLAGS_LOWRESPRECALC) { - - if (nChannels > 4) - return 6; // 6 for more than 4 channels - - if (nChannels == 1) - return 33; // For monochrome - - return 17; // 17 for remaining - } - - // Default values - if (nChannels > 4) - return 7; // 7 for Hifi - - if (nChannels == 4) - return 17; // 17 for CMYK - - return 33; // 33 for RGB -} - - -cmsBool _cmsEndPointsBySpace(cmsColorSpaceSignature Space, - cmsUInt16Number **White, - cmsUInt16Number **Black, - cmsUInt32Number *nOutputs) -{ - // Only most common spaces - - static cmsUInt16Number RGBblack[4] = { 0, 0, 0 }; - static cmsUInt16Number RGBwhite[4] = { 0xffff, 0xffff, 0xffff }; - static cmsUInt16Number CMYKblack[4] = { 0xffff, 0xffff, 0xffff, 0xffff }; // 400% of ink - static cmsUInt16Number CMYKwhite[4] = { 0, 0, 0, 0 }; - static cmsUInt16Number LABblack[4] = { 0, 0x8080, 0x8080 }; // V4 Lab encoding - static cmsUInt16Number LABwhite[4] = { 0xFFFF, 0x8080, 0x8080 }; - static cmsUInt16Number CMYblack[4] = { 0xffff, 0xffff, 0xffff }; - static cmsUInt16Number CMYwhite[4] = { 0, 0, 0 }; - static cmsUInt16Number Grayblack[4] = { 0 }; - static cmsUInt16Number GrayWhite[4] = { 0xffff }; - - switch (Space) { - - case cmsSigGrayData: if (White) *White = GrayWhite; - if (Black) *Black = Grayblack; - if (nOutputs) *nOutputs = 1; - return TRUE; - - case cmsSigRgbData: if (White) *White = RGBwhite; - if (Black) *Black = RGBblack; - if (nOutputs) *nOutputs = 3; - return TRUE; - - case cmsSigLabData: if (White) *White = LABwhite; - if (Black) *Black = LABblack; - if (nOutputs) *nOutputs = 3; - return TRUE; - - case cmsSigCmykData: if (White) *White = CMYKwhite; - if (Black) *Black = CMYKblack; - if (nOutputs) *nOutputs = 4; - return TRUE; - - case cmsSigCmyData: if (White) *White = CMYwhite; - if (Black) *Black = CMYblack; - if (nOutputs) *nOutputs = 3; - return TRUE; - - default:; - } - - return FALSE; -} - - - -// Several utilities ------------------------------------------------------- - -// Translate from our colorspace to ICC representation - -cmsColorSpaceSignature CMSEXPORT _cmsICCcolorSpace(int OurNotation) -{ - switch (OurNotation) { - - case 1: - case PT_GRAY: return cmsSigGrayData; - - case 2: - case PT_RGB: return cmsSigRgbData; - - case PT_CMY: return cmsSigCmyData; - case PT_CMYK: return cmsSigCmykData; - case PT_YCbCr:return cmsSigYCbCrData; - case PT_YUV: return cmsSigLuvData; - case PT_XYZ: return cmsSigXYZData; - - case PT_LabV2: - case PT_Lab: return cmsSigLabData; - - case PT_YUVK: return cmsSigLuvKData; - case PT_HSV: return cmsSigHsvData; - case PT_HLS: return cmsSigHlsData; - case PT_Yxy: return cmsSigYxyData; - - case PT_MCH1: return cmsSigMCH1Data; - case PT_MCH2: return cmsSigMCH2Data; - case PT_MCH3: return cmsSigMCH3Data; - case PT_MCH4: return cmsSigMCH4Data; - case PT_MCH5: return cmsSigMCH5Data; - case PT_MCH6: return cmsSigMCH6Data; - case PT_MCH7: return cmsSigMCH7Data; - case PT_MCH8: return cmsSigMCH8Data; - - case PT_MCH9: return cmsSigMCH9Data; - case PT_MCH10: return cmsSigMCHAData; - case PT_MCH11: return cmsSigMCHBData; - case PT_MCH12: return cmsSigMCHCData; - case PT_MCH13: return cmsSigMCHDData; - case PT_MCH14: return cmsSigMCHEData; - case PT_MCH15: return cmsSigMCHFData; - - default: return (cmsColorSpaceSignature) (-1); - } -} - - -int CMSEXPORT _cmsLCMScolorSpace(cmsColorSpaceSignature ProfileSpace) -{ - switch (ProfileSpace) { - - case cmsSigGrayData: return PT_GRAY; - case cmsSigRgbData: return PT_RGB; - case cmsSigCmyData: return PT_CMY; - case cmsSigCmykData: return PT_CMYK; - case cmsSigYCbCrData:return PT_YCbCr; - case cmsSigLuvData: return PT_YUV; - case cmsSigXYZData: return PT_XYZ; - case cmsSigLabData: return PT_Lab; - case cmsSigLuvKData: return PT_YUVK; - case cmsSigHsvData: return PT_HSV; - case cmsSigHlsData: return PT_HLS; - case cmsSigYxyData: return PT_Yxy; - - case cmsSig1colorData: - case cmsSigMCH1Data: return PT_MCH1; - - case cmsSig2colorData: - case cmsSigMCH2Data: return PT_MCH2; - - case cmsSig3colorData: - case cmsSigMCH3Data: return PT_MCH3; - - case cmsSig4colorData: - case cmsSigMCH4Data: return PT_MCH4; - - case cmsSig5colorData: - case cmsSigMCH5Data: return PT_MCH5; - - case cmsSig6colorData: - case cmsSigMCH6Data: return PT_MCH6; - - case cmsSigMCH7Data: - case cmsSig7colorData:return PT_MCH7; - - case cmsSigMCH8Data: - case cmsSig8colorData:return PT_MCH8; - - case cmsSigMCH9Data: - case cmsSig9colorData:return PT_MCH9; - - case cmsSigMCHAData: - case cmsSig10colorData:return PT_MCH10; - - case cmsSigMCHBData: - case cmsSig11colorData:return PT_MCH11; - - case cmsSigMCHCData: - case cmsSig12colorData:return PT_MCH12; - - case cmsSigMCHDData: - case cmsSig13colorData:return PT_MCH13; - - case cmsSigMCHEData: - case cmsSig14colorData:return PT_MCH14; - - case cmsSigMCHFData: - case cmsSig15colorData:return PT_MCH15; - - default: return (cmsColorSpaceSignature) (-1); - } -} - - -cmsUInt32Number CMSEXPORT cmsChannelsOf(cmsColorSpaceSignature ColorSpace) -{ - switch (ColorSpace) { - - case cmsSigMCH1Data: - case cmsSig1colorData: - case cmsSigGrayData: return 1; - - case cmsSigMCH2Data: - case cmsSig2colorData: return 2; - - case cmsSigXYZData: - case cmsSigLabData: - case cmsSigLuvData: - case cmsSigYCbCrData: - case cmsSigYxyData: - case cmsSigRgbData: - case cmsSigHsvData: - case cmsSigHlsData: - case cmsSigCmyData: - case cmsSigMCH3Data: - case cmsSig3colorData: return 3; - - case cmsSigLuvKData: - case cmsSigCmykData: - case cmsSigMCH4Data: - case cmsSig4colorData: return 4; - - case cmsSigMCH5Data: - case cmsSig5colorData: return 5; - - case cmsSigMCH6Data: - case cmsSig6colorData: return 6; - - case cmsSigMCH7Data: - case cmsSig7colorData: return 7; - - case cmsSigMCH8Data: - case cmsSig8colorData: return 8; - - case cmsSigMCH9Data: - case cmsSig9colorData: return 9; - - case cmsSigMCHAData: - case cmsSig10colorData: return 10; - - case cmsSigMCHBData: - case cmsSig11colorData: return 11; - - case cmsSigMCHCData: - case cmsSig12colorData: return 12; - - case cmsSigMCHDData: - case cmsSig13colorData: return 13; - - case cmsSigMCHEData: - case cmsSig14colorData: return 14; - - case cmsSigMCHFData: - case cmsSig15colorData: return 15; - - default: return 3; - } -} |