QVector <double> LcmsColorProfileContainer::getEstimatedTRC() const
{
QVector <double> TRCtriplet(3);
if (d->hasColorants) {
if (cmsIsToneCurveLinear(d->redTRC)) {
TRCtriplet[0] = 1.0;
} else {
TRCtriplet[0] = cmsEstimateGamma(d->redTRC, 0.01);
}
if (cmsIsToneCurveLinear(d->greenTRC)) {
TRCtriplet[1] = 1.0;
} else {
TRCtriplet[1] = cmsEstimateGamma(d->greenTRC, 0.01);
}
if (cmsIsToneCurveLinear(d->blueTRC)) {
TRCtriplet[2] = 1.0;
} else {
TRCtriplet[2] = cmsEstimateGamma(d->blueTRC, 0.01);
}
} else {
if (cmsIsTag(d->profile, cmsSigGrayTRCTag)) {
if (cmsIsToneCurveLinear(d->grayTRC)) {
TRCtriplet.fill(1.0);
} else {
TRCtriplet.fill(cmsEstimateGamma(d->grayTRC, 0.01));
}
} else {
TRCtriplet.fill(1.0);
}
}
return TRCtriplet;
}
void LcmsColorProfileContainer::DelinearizeFloatValueFast(QVector <double> & Value) const
{
const qreal scale = 65535.0;
const qreal invScale = 1.0 / scale;
if (d->hasColorants) {
//we can only reliably delinearise in the 0-1.0 range, outside of that leave the value alone.
QVector <quint16> TRCtriplet(3);
TRCtriplet[0] = Value[0] * scale;
TRCtriplet[1] = Value[1] * scale;
TRCtriplet[2] = Value[2] * scale;
if (!cmsIsToneCurveLinear(d->redTRC) && Value[0]<1.0) {
TRCtriplet[0] = cmsEvalToneCurve16(d->redTRCReverse, TRCtriplet[0]);
Value[0] = TRCtriplet[0] * invScale;
}
if (!cmsIsToneCurveLinear(d->greenTRC) && Value[1]<1.0) {
TRCtriplet[1] = cmsEvalToneCurve16(d->greenTRCReverse, TRCtriplet[1]);
Value[1] = TRCtriplet[1] * invScale;
}
if (!cmsIsToneCurveLinear(d->blueTRC) && Value[2]<1.0) {
TRCtriplet[2] = cmsEvalToneCurve16(d->blueTRCReverse, TRCtriplet[2]);
Value[2] = TRCtriplet[2] * invScale;
}
} else {
if (cmsIsTag(d->profile, cmsSigGrayTRCTag) && Value[0]<1.0) {
quint16 newValue = cmsEvalToneCurve16(d->grayTRCReverse, Value[0] * scale);
Value[0] = newValue * invScale;
}
}
}
void LcmsColorProfileContainer::LinearizeFloatValueFast(QVector <double> & Value) const
{
//we can only reliably delinearise in the 0-1.0 range, outside of that leave the value alone.
QVector <quint16> TRCtriplet(3);
TRCtriplet[0] = Value[0]*65535;
TRCtriplet[1] = Value[1]*65535;
TRCtriplet[2] = Value[2]*65535;
if (d->hasColorants) {
if (!cmsIsToneCurveLinear(d->redTRC) && Value[0]<1.0) {
TRCtriplet[0] = cmsEvalToneCurve16(d->redTRC, TRCtriplet[0]);
Value[0] = TRCtriplet[0]/65535.0;
}
if (!cmsIsToneCurveLinear(d->greenTRC) && Value[1]<1.0) {
TRCtriplet[1] = cmsEvalToneCurve16(d->greenTRC, TRCtriplet[1]);
Value[1] = TRCtriplet[1]/65535.0;
}
if (!cmsIsToneCurveLinear(d->blueTRC) && Value[2]<1.0) {
TRCtriplet[2] = cmsEvalToneCurve16(d->blueTRC, TRCtriplet[2]);
Value[2] = TRCtriplet[2]/65535.0;
}
} else {
if (cmsIsTag(d->profile, cmsSigGrayTRCTag) && Value[0]<1.0) {
TRCtriplet[0] = (cmsEvalToneCurve16(d->grayTRC, Value[0]*65535));
Value.fill(TRCtriplet[0]/65535.0);
}
}
}
void LcmsColorProfileContainer::DelinearizeFloatValue(QVector <double> & Value) const
{
QVector <double> TRCtriplet(3);
TRCtriplet[0] = Value[0];
TRCtriplet[1] = Value[1];
TRCtriplet[2] = Value[2];
if (cmsIsTag(d->profile, cmsSigRedTRCTag)) {
if (cmsIsToneCurveLinear(d->redTRC)) {
TRCtriplet[0] = Value[0];
} else {
TRCtriplet[0] = cmsEvalToneCurveFloat(d->redTRCReverse, Value[0]);
}
if (cmsIsToneCurveLinear(d->greenTRC)) {
TRCtriplet[1] = Value[1];
} else {
TRCtriplet[1] = cmsEvalToneCurveFloat(d->greenTRCReverse, Value[1]);
}
if (cmsIsToneCurveLinear(d->blueTRC)) {
TRCtriplet[2] = Value[2];
} else {
TRCtriplet[2] = cmsEvalToneCurveFloat(d->blueTRCReverse, Value[2]);
}
} else {
if (cmsIsTag(d->profile, cmsSigGrayTRCTag)) {
TRCtriplet.fill(cmsEvalToneCurveFloat(d->grayTRCReverse, Value[0]));
}
}
Value = TRCtriplet;
}
/**
* gimp_color_profile_is_linear:
* @profile: a #GimpColorProfile
*
* This function determines is the ICC profile represented by a GimpColorProfile
* is a linear RGB profile or not, some profiles that are LUTs though linear
* will also return FALSE;
*
* Return value: %TRUE if the profile is a matrix shaping profile with linear
* TRCs, %FALSE otherwise.
*
* Since: 2.10
**/
gboolean
gimp_color_profile_is_linear (GimpColorProfile *profile)
{
cmsHPROFILE prof;
cmsToneCurve *curve;
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
prof = profile->priv->lcms_profile;
if (! cmsIsMatrixShaper (prof))
return FALSE;
if (cmsIsCLUT (prof, INTENT_PERCEPTUAL, LCMS_USED_AS_INPUT))
return FALSE;
if (cmsIsCLUT (prof, INTENT_PERCEPTUAL, LCMS_USED_AS_OUTPUT))
return FALSE;
curve = cmsReadTag(prof, cmsSigRedTRCTag);
if (curve == NULL || ! cmsIsToneCurveLinear (curve))
return FALSE;
curve = cmsReadTag (prof, cmsSigGreenTRCTag);
if (curve == NULL || ! cmsIsToneCurveLinear (curve))
return FALSE;
curve = cmsReadTag (prof, cmsSigBlueTRCTag);
if (curve == NULL || ! cmsIsToneCurveLinear (curve))
return FALSE;
return TRUE;
}
void LcmsColorProfileContainer::DelinearizeFloatValue(QVector <double> & Value) const
{
if (d->hasColorants) {
if (!cmsIsToneCurveLinear(d->redTRC)) {
Value[0] = cmsEvalToneCurveFloat(d->redTRCReverse, Value[0]);
}
if (!cmsIsToneCurveLinear(d->greenTRC)) {
Value[1] = cmsEvalToneCurveFloat(d->greenTRCReverse, Value[1]);
}
if (!cmsIsToneCurveLinear(d->blueTRC)) {
Value[2] = cmsEvalToneCurveFloat(d->blueTRCReverse, Value[2]);
}
} else {
if (cmsIsTag(d->profile, cmsSigGrayTRCTag)) {
Value[0] = cmsEvalToneCurveFloat(d->grayTRCReverse, Value[0]);
}
}
}
// Smooths a curve sampled at regular intervals.
cmsBool CMSEXPORT cmsSmoothToneCurve(cmsToneCurve* Tab, cmsFloat64Number lambda)
{
cmsFloat32Number w[MAX_NODES_IN_CURVE], y[MAX_NODES_IN_CURVE], z[MAX_NODES_IN_CURVE];
int i, nItems, Zeros, Poles;
if (Tab == NULL) return FALSE;
if (cmsIsToneCurveLinear(Tab)) return FALSE; // Nothing to do
nItems = Tab -> nEntries;
if (nItems >= MAX_NODES_IN_CURVE) {
cmsSignalError(Tab ->InterpParams->ContextID, cmsERROR_RANGE, "cmsSmoothToneCurve: too many points.");
return FALSE;
}
memset(w, 0, nItems * sizeof(cmsFloat32Number));
memset(y, 0, nItems * sizeof(cmsFloat32Number));
memset(z, 0, nItems * sizeof(cmsFloat32Number));
for (i=0; i < nItems; i++)
{
y[i+1] = (cmsFloat32Number) Tab -> Table16[i];
w[i+1] = 1.0;
}
if (!smooth2(Tab ->InterpParams->ContextID, w, y, z, (cmsFloat32Number) lambda, nItems)) return FALSE;
// Do some reality - checking...
Zeros = Poles = 0;
for (i=nItems; i > 1; --i) {
if (z[i] == 0.) Zeros++;
if (z[i] >= 65535.) Poles++;
if (z[i] < z[i-1]) return FALSE; // Non-Monotonic
}
if (Zeros > (nItems / 3)) return FALSE; // Degenerated, mostly zeros
if (Poles > (nItems / 3)) return FALSE; // Degenerated, mostly poles
// Seems ok
for (i=0; i < nItems; i++) {
// Clamp to cmsUInt16Number
Tab -> Table16[i] = _cmsQuickSaturateWord(z[i+1]);
}
return TRUE;
}
static
void Emit1Gamma(cmsIOHANDLER* m, cmsToneCurve* Table)
{
cmsUInt32Number i;
cmsFloat64Number gamma;
if (Table ->nEntries <= 0) return; // Empty table
// Suppress whole if identity
if (cmsIsToneCurveLinear(Table)) return;
// Check if is really an exponential. If so, emit "exp"
gamma = cmsEstimateGamma(Table, 0.001);
if (gamma > 0) {
_cmsIOPrintf(m, "{ %g exp } bind ", gamma);
return;
}
_cmsIOPrintf(m, "{ ");
// Bounds check
EmitRangeCheck(m);
// Emit intepolation code
// PostScript code Stack
// =============== ========================
// v
_cmsIOPrintf(m, " [");
for (i=0; i < Table->nEntries; i++) {
_cmsIOPrintf(m, "%d ", Table->Table16[i]);
}
_cmsIOPrintf(m, "] "); // v tab
_cmsIOPrintf(m, "dup "); // v tab tab
_cmsIOPrintf(m, "length 1 sub "); // v tab dom
_cmsIOPrintf(m, "3 -1 roll "); // tab dom v
_cmsIOPrintf(m, "mul "); // tab val2
_cmsIOPrintf(m, "dup "); // tab val2 val2
_cmsIOPrintf(m, "dup "); // tab val2 val2 val2
_cmsIOPrintf(m, "floor cvi "); // tab val2 val2 cell0
_cmsIOPrintf(m, "exch "); // tab val2 cell0 val2
_cmsIOPrintf(m, "ceiling cvi "); // tab val2 cell0 cell1
_cmsIOPrintf(m, "3 index "); // tab val2 cell0 cell1 tab
_cmsIOPrintf(m, "exch "); // tab val2 cell0 tab cell1
_cmsIOPrintf(m, "get "); // tab val2 cell0 y1
_cmsIOPrintf(m, "4 -1 roll "); // val2 cell0 y1 tab
_cmsIOPrintf(m, "3 -1 roll "); // val2 y1 tab cell0
_cmsIOPrintf(m, "get "); // val2 y1 y0
_cmsIOPrintf(m, "dup "); // val2 y1 y0 y0
_cmsIOPrintf(m, "3 1 roll "); // val2 y0 y1 y0
_cmsIOPrintf(m, "sub "); // val2 y0 (y1-y0)
_cmsIOPrintf(m, "3 -1 roll "); // y0 (y1-y0) val2
_cmsIOPrintf(m, "dup "); // y0 (y1-y0) val2 val2
_cmsIOPrintf(m, "floor cvi "); // y0 (y1-y0) val2 floor(val2)
_cmsIOPrintf(m, "sub "); // y0 (y1-y0) rest
_cmsIOPrintf(m, "mul "); // y0 t1
_cmsIOPrintf(m, "add "); // y
_cmsIOPrintf(m, "65535 div "); // result
_cmsIOPrintf(m, " } bind ");
}
static int
dt_colorspaces_get_matrix_from_profile (cmsHPROFILE prof, float *matrix, float *lutr, float *lutg, float* lutb, const int lutsize, const int input)
{
// create an OpenCL processable matrix + tone curves from an cmsHPROFILE:
// check this first:
if(!cmsIsMatrixShaper(prof)) return 1;
cmsToneCurve* red_curve = cmsReadTag(prof, cmsSigRedTRCTag);
cmsToneCurve* green_curve = cmsReadTag(prof, cmsSigGreenTRCTag);
cmsToneCurve* blue_curve = cmsReadTag(prof, cmsSigBlueTRCTag);
cmsCIEXYZ *red_color = cmsReadTag(prof, cmsSigRedColorantTag);
cmsCIEXYZ *green_color = cmsReadTag(prof, cmsSigGreenColorantTag);
cmsCIEXYZ *blue_color = cmsReadTag(prof, cmsSigBlueColorantTag);
if(!red_curve || !green_curve || !blue_curve || !red_color || !green_color || !blue_color) return 2;
matrix[0] = red_color->X;
matrix[1] = green_color->X;
matrix[2] = blue_color->X;
matrix[3] = red_color->Y;
matrix[4] = green_color->Y;
matrix[5] = blue_color->Y;
matrix[6] = red_color->Z;
matrix[7] = green_color->Z;
matrix[8] = blue_color->Z;
// some camera ICC profiles claim to have color locations for red, green and blue base colors defined,
// but in fact these are all set to zero. we catch this case here.
float sum = 0.0f;
for(int k=0; k<9; k++) sum += matrix[k];
if(sum == 0.0f) return 3;
if(input)
{
// mark as linear, if they are:
if(cmsIsToneCurveLinear(red_curve)) lutr[0] = -1.0f;
else for(int k=0; k<lutsize; k++) lutr[k] = cmsEvalToneCurveFloat(red_curve, k/(lutsize-1.0f));
if(cmsIsToneCurveLinear(green_curve)) lutg[0] = -1.0f;
else for(int k=0; k<lutsize; k++) lutg[k] = cmsEvalToneCurveFloat(green_curve, k/(lutsize-1.0f));
if(cmsIsToneCurveLinear(blue_curve)) lutb[0] = -1.0f;
else for(int k=0; k<lutsize; k++) lutb[k] = cmsEvalToneCurveFloat(blue_curve, k/(lutsize-1.0f));
}
else
{
// invert profile->XYZ matrix for output profiles
float tmp[9];
memcpy(tmp, matrix, sizeof(float)*9);
if(mat3inv (matrix, tmp)) return 3;
// also need to reverse gamma, to apply reverse before matrix multiplication:
cmsToneCurve* rev_red = cmsReverseToneCurveEx(0x8000, red_curve);
cmsToneCurve* rev_green = cmsReverseToneCurveEx(0x8000, green_curve);
cmsToneCurve* rev_blue = cmsReverseToneCurveEx(0x8000, blue_curve);
if(!rev_red || !rev_green || !rev_blue)
{
cmsFreeToneCurve(rev_red);
cmsFreeToneCurve(rev_green);
cmsFreeToneCurve(rev_blue);
return 4;
}
// pass on tonecurves, in case lutsize > 0:
if(cmsIsToneCurveLinear(red_curve)) lutr[0] = -1.0f;
else for(int k=0; k<lutsize; k++) lutr[k] = cmsEvalToneCurveFloat(rev_red, k/(lutsize-1.0f));
if(cmsIsToneCurveLinear(green_curve)) lutg[0] = -1.0f;
else for(int k=0; k<lutsize; k++) lutg[k] = cmsEvalToneCurveFloat(rev_green, k/(lutsize-1.0f));
if(cmsIsToneCurveLinear(blue_curve)) lutb[0] = -1.0f;
else for(int k=0; k<lutsize; k++) lutb[k] = cmsEvalToneCurveFloat(rev_blue, k/(lutsize-1.0f));
cmsFreeToneCurve(rev_red);
cmsFreeToneCurve(rev_green);
cmsFreeToneCurve(rev_blue);
}
return 0;
}