PTErr_t
makeInverseXformMono ( ResponseRecord_p grayTRC,
fut_p theFut)
{
PTErr_t PTErr = KCP_FAILURE;
fut_otbldat_p otblDat;
ResponseRecord_t rrt;
KpInt32_t futReturn;
fut_calcData_t data;
double gamma;
KpUInt16_t rrpData[2] = { 0, RRECORD_DATA_SIZE -1 };
/* compute new grid table entries */
data.chan = 0;
if (!fut_calc_gtblEx (theFut->chan[0]->gtbl, fut_grampEx, &data)) {
goto ErrOut0;
}
/* compute new output table entries */
if (!fut_calc_otblEx (theFut->chan[0]->otbl, otblFunc, NULL)) {
goto ErrOut0;
}
/* get address of the first output table */
futReturn = fut_get_otbl (theFut, 0, &otblDat);
if ((futReturn != 1) || (otblDat == (fut_otbldat_p)NULL)) {
goto ErrOut0;
}
/* setup the output table */
switch (grayTRC->count) {
case 0:
/* setup the responseRecord struct */
rrt.count = 2;
rrt.data = rrpData;
/* make the output table */
PTErr = calcOtblLN (otblDat, &rrt);
break;
case 1:
gamma = (double)grayTRC->data[0] / SCALEDOT8;
if (gamma <= 0.0) {
goto ErrOut0;
}
/* make the output table */
PTErr = calcOtblL1 (otblDat, gamma);
break;
default:
/* make the output table */
makeInverseMonotonic (grayTRC->count, grayTRC->data);
PTErr = calcOtblLN (otblDat, grayTRC);
}
GetOut:
return (PTErr);
ErrOut0:
PTErr = KCP_SYSERR_0;
goto GetOut;
}
/*---------------------------------------------------------------------------
* makeInverseXformFromMatrix -- make a fut of given gridsize from given
* matrix data for inverse transform (XYZ -> RGB); return status code
*---------------------------------------------------------------------------
*/
PTErr_t
makeInverseXformFromMatrix (LPMATRIXDATA mdata,
KpUInt32_t interpMode,
KpInt32_p dim,
fut_p theFut)
{
PTErr_t PTErr = KCP_SUCCESS;
ResponseRecord_p rrp;
KpInt32_t i;
fut_chan_p theChan;
fut_gtbl_p theGtbl;
fut_otbl_p theOtbl;
mf2_tbldat_p gtblDat[3], otblDat, prevOtblDat;
KpUInt16_t prevGamma = 0, thisGamma;
double fwdgamma, one[3];
double offset[3] = {1.0 / 3.0, 1.0 / 3.0, 1.0 / 3.0};
KpUInt16_t *pCurveData = NULL;
for (i = 0; i < 3; i++) {
if (!IS_CHAN(theChan = theFut->chan[i])
|| !IS_GTBL(theGtbl = theChan->gtbl)
|| ((gtblDat[i] = theGtbl->refTbl) == NULL) /* Get grid tables */
|| !IS_OTBL(theOtbl = theChan->otbl)
|| ((otblDat = theOtbl->refTbl) == NULL)) { /* Get output table */
return KCP_INCON_PT;
}
if (theOtbl->refTblEntries != FUT_OUTTBL_ENT) return KCP_INCON_PT;
/* Get ResponseRecord: */
rrp = mdata->outResponse[i];
if (NULL == rrp) {
break; /* must only have output tables */
}
if (PARA_TYPE_SIG == rrp->TagSig)
{
pCurveData = (KpUInt16_p) allocBufferPtr (MFV_CURVE_TBL_ENT*sizeof(KpUInt16_t)); /* get memory for curve data */
if (NULL == pCurveData) {
return KCP_NO_MEMORY;
}
makeCurveFromPara (rrp->ParaFunction, rrp->ParaParams, pCurveData, MFV_CURVE_TBL_ENT);
rrp->CurveCount = MFV_CURVE_TBL_ENT;
rrp->CurveData = pCurveData;
}
if ((rrp->CurveCount > 0) && (rrp->CurveData == (KpUInt16_p)NULL)) {
PTErr = KCP_INCON_PT;
goto ErrOut;
}
/* Recompute output table: */
switch (rrp->CurveCount) {
case 0: /* linear response, with clipping */
calcOtbl0 (otblDat);
break;
case 1: /* power law */
thisGamma = rrp->CurveData[0];
if (prevGamma == thisGamma) { /* same gamma, just copy table */
memcpy (otblDat, prevOtblDat, sizeof (*otblDat) * FUT_OUTTBL_ENT);
}
else {
prevGamma = thisGamma;
prevOtblDat = otblDat;
fwdgamma = (double)thisGamma / SCALEDOT8;
if (fwdgamma <= 0.0) {
PTErr = KCP_INCON_PT;
goto ErrOut;
}
calcOtbl1 (otblDat, fwdgamma);
}
break;
default: /* look-up table of arbitrary length */
makeInverseMonotonic (rrp->CurveCount, rrp->CurveData);
if (rrp->CurveCount == theOtbl->refTblEntries) { /* ready-to-use look-up table */
memcpy (otblDat, rrp->CurveData, sizeof (*otblDat) * rrp->CurveCount);
}
else {
PTErr = calcOtblN (otblDat, rrp, interpMode);
if (PTErr != KCP_SUCCESS) {
PTErr = KCP_INCON_PT;
goto ErrOut;
}
}
break;
}
}
/* Compute inverse matrix (XYZ -> RGB): */
one[0] = one[1] = one[2] = 1.0; /* arbitrary vector */
/* replaces matrix with inverse */
if (solvemat (3, mdata->matrix, one) != 0) {
PTErr = KCP_INCON_PT;
goto ErrOut;
}
/* Rescale given matrix by factor of 3 for extended range: */
for (i = 0; i < 3; i++) {
KpInt32_t j;
for (j = 0; j < 3; j++) {
mdata->matrix[i][j] /= 3.0;
}
}
/* Replace grid tables: */
calcGtbl3 (gtblDat, dim, mdata->matrix, offset); /* with offset */
ErrOut:
if (NULL != pCurveData) {
freeBufferPtr (pCurveData);
}
return PTErr;
}