// Get rid of transform resources
void CMSEXPORT cmsDeleteTransform(cmsHTRANSFORM hTransform)
{
_cmsTRANSFORM* p = (_cmsTRANSFORM*) hTransform;
_cmsAssert(p != NULL);
if (p -> GamutCheck)
cmsPipelineFree(p -> GamutCheck);
if (p -> Lut)
cmsPipelineFree(p -> Lut);
if (p ->InputColorant)
cmsFreeNamedColorList(p ->InputColorant);
if (p -> OutputColorant)
cmsFreeNamedColorList(p ->OutputColorant);
if (p ->Sequence)
cmsFreeProfileSequenceDescription(p ->Sequence);
if (p ->UserData)
p ->FreeUserData(p ->ContextID, p ->UserData);
_cmsFree(p ->ContextID, (void *) p);
}
// Free open resources
static
void CloseTransforms(void)
{
if (InputColorant) cmsFreeNamedColorList(InputColorant);
if (OutputColorant) cmsFreeNamedColorList(OutputColorant);
if (hTrans) cmsDeleteTransform(hTrans);
if (hTransLab) cmsDeleteTransform(hTransLab);
if (hTransXYZ) cmsDeleteTransform(hTransXYZ);
}
// This function creates a named color profile dumping all the contents of transform to a single profile
// In this way, LittleCMS may be used to "group" several named color databases into a single profile.
// It has, however, several minor limitations. PCS is always Lab, which is not very critic since this
// is the normal PCS for named color profiles.
static
cmsHPROFILE CreateNamedColorDevicelink(cmsHTRANSFORM xform)
{
_cmsTRANSFORM* v = (_cmsTRANSFORM*) xform;
cmsHPROFILE hICC = NULL;
int i, nColors;
cmsNAMEDCOLORLIST *nc2 = NULL, *Original = NULL;
// Create an empty placeholder
hICC = cmsCreateProfilePlaceholder(v->ContextID);
if (hICC == NULL) return NULL;
// Critical information
cmsSetDeviceClass(hICC, cmsSigNamedColorClass);
cmsSetColorSpace(hICC, v ->ExitColorSpace);
cmsSetPCS(hICC, cmsSigLabData);
// Tag profile with information
if (!SetTextTags(hICC, L"Named color devicelink")) goto Error;
Original = cmsGetNamedColorList(xform);
if (Original == NULL) goto Error;
nColors = cmsNamedColorCount(Original);
nc2 = cmsDupNamedColorList(Original);
if (nc2 == NULL) goto Error;
// Colorant count now depends on the output space
nc2 ->ColorantCount = cmsPipelineOutputChannels(v ->Lut);
// Make sure we have proper formatters
cmsChangeBuffersFormat(xform, TYPE_NAMED_COLOR_INDEX,
FLOAT_SH(0) | COLORSPACE_SH(_cmsLCMScolorSpace(v ->ExitColorSpace))
| BYTES_SH(2) | CHANNELS_SH(cmsChannelsOf(v ->ExitColorSpace)));
// Apply the transfor to colorants.
for (i=0; i < nColors; i++) {
cmsDoTransform(xform, &i, nc2 ->List[i].DeviceColorant, 1);
}
if (!cmsWriteTag(hICC, cmsSigNamedColor2Tag, (void*) nc2)) goto Error;
cmsFreeNamedColorList(nc2);
return hICC;
Error:
if (hICC != NULL) cmsCloseProfile(hICC);
return NULL;
}
static
cmsHPROFILE CreateNamedColorDevicelink(cmsHTRANSFORM xform)
{
_LPcmsTRANSFORM v = (_LPcmsTRANSFORM) xform;
cmsHPROFILE hICC;
cmsCIEXYZ WhitePoint;
int i, nColors;
size_t Size;
LPcmsNAMEDCOLORLIST nc2;
hICC = _cmsCreateProfilePlaceholder();
if (hICC == NULL) return NULL;
cmsSetRenderingIntent(hICC, v -> Intent);
cmsSetDeviceClass(hICC, icSigNamedColorClass);
cmsSetColorSpace(hICC, v ->ExitColorSpace);
cmsSetPCS(hICC, cmsGetPCS(v ->InputProfile));
cmsTakeMediaWhitePoint(&WhitePoint, v ->InputProfile);
cmsAddTag(hICC, icSigMediaWhitePointTag, &WhitePoint);
cmsAddTag(hICC, icSigDeviceMfgDescTag, (LPVOID) "LittleCMS");
cmsAddTag(hICC, icSigProfileDescriptionTag, (LPVOID) "Named color Device link");
cmsAddTag(hICC, icSigDeviceModelDescTag, (LPVOID) "Named color Device link");
nColors = cmsNamedColorCount(xform);
nc2 = cmsAllocNamedColorList(nColors);
Size = sizeof(cmsNAMEDCOLORLIST) + (sizeof(cmsNAMEDCOLOR) * (nColors-1));
CopyMemory(nc2, v->NamedColorList, Size);
nc2 ->ColorantCount = _cmsChannelsOf(v ->ExitColorSpace);
for (i=0; i < nColors; i++) {
cmsDoTransform(xform, &i, nc2 ->List[i].DeviceColorant, 1);
}
cmsAddTag(hICC, icSigNamedColor2Tag, (void*) nc2);
cmsFreeNamedColorList(nc2);
return hICC;
}
// This one includes abstract profiles as well. Matrix-shaper cannot be obtained on that device class. The
// tag name here may default to AToB0
cmsPipeline* _cmsReadDevicelinkLUT(cmsHPROFILE hProfile, int Intent)
{
cmsPipeline* Lut;
cmsTagTypeSignature OriginalType;
cmsTagSignature tag16;
cmsTagSignature tagFloat;
cmsContext ContextID = cmsGetProfileContextID(hProfile);
if (Intent < INTENT_PERCEPTUAL || Intent > INTENT_ABSOLUTE_COLORIMETRIC)
return NULL;
tag16 = Device2PCS16[Intent];
tagFloat = Device2PCSFloat[Intent];
// On named color, take the appropriate tag
if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*)cmsReadTag(hProfile, cmsSigNamedColor2Tag);
if (nc == NULL) return NULL;
Lut = cmsPipelineAlloc(ContextID, 0, 0);
if (Lut == NULL)
goto Error;
if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, FALSE)))
goto Error;
if (cmsGetColorSpace(hProfile) == cmsSigLabData)
if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
goto Error;
return Lut;
Error:
cmsPipelineFree(Lut);
cmsFreeNamedColorList(nc);
return NULL;
}
if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
// Floating point LUT are always V
return _cmsReadFloatDevicelinkTag(hProfile, tagFloat);
}
tagFloat = Device2PCSFloat[0];
if (cmsIsTag(hProfile, tagFloat)) {
return cmsPipelineDup((cmsPipeline*)cmsReadTag(hProfile, tagFloat));
}
if (!cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
tag16 = Device2PCS16[0];
if (!cmsIsTag(hProfile, tag16)) return NULL;
}
// Check profile version and LUT type. Do the necessary adjustments if needed
// Read the tag
Lut = (cmsPipeline*)cmsReadTag(hProfile, tag16);
if (Lut == NULL) return NULL;
// The profile owns the Lut, so we need to copy it
Lut = cmsPipelineDup(Lut);
if (Lut == NULL) return NULL;
// Now it is time for a controversial stuff. I found that for 3D LUTS using
// Lab used as indexer space, trilinear interpolation should be used
if (cmsGetPCS(hProfile) == cmsSigLabData)
ChangeInterpolationToTrilinear(Lut);
// After reading it, we have info about the original type
OriginalType = _cmsGetTagTrueType(hProfile, tag16);
// We need to adjust data for Lab16 on output
if (OriginalType != cmsSigLut16Type) return Lut;
// Here it is possible to get Lab on both sides
if (cmsGetColorSpace(hProfile) == cmsSigLabData) {
if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
goto Error2;
}
if (cmsGetPCS(hProfile) == cmsSigLabData) {
if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
goto Error2;
}
return Lut;
Error2:
cmsPipelineFree(Lut);
return NULL;
}
// Read and create a BRAND NEW MPE LUT from a given profile. All stuff dependent of version, etc
// is adjusted here in order to create a LUT that takes care of all those details.
// We add intent = -1 as a way to read matrix shaper always, no matter of other LUT
cmsPipeline* _cmsReadInputLUT(cmsHPROFILE hProfile, int Intent)
{
cmsTagTypeSignature OriginalType;
cmsTagSignature tag16;
cmsTagSignature tagFloat;
cmsContext ContextID = cmsGetProfileContextID(hProfile);
// On named color, take the appropriate tag
if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
cmsPipeline* Lut;
cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*) cmsReadTag(hProfile, cmsSigNamedColor2Tag);
if (nc == NULL) return NULL;
Lut = cmsPipelineAlloc(ContextID, 0, 0);
if (Lut == NULL) {
cmsFreeNamedColorList(nc);
return NULL;
}
if (!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, TRUE)) ||
!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID))) {
cmsPipelineFree(Lut);
return NULL;
}
return Lut;
}
// This is an attempt to reuse this function to retrieve the matrix-shaper as pipeline no
// matter other LUT are present and have precedence. Intent = -1 means just this.
if (Intent >= INTENT_PERCEPTUAL && Intent <= INTENT_ABSOLUTE_COLORIMETRIC) {
tag16 = Device2PCS16[Intent];
tagFloat = Device2PCSFloat[Intent];
if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
// Floating point LUT are always V4, but the encoding range is no
// longer 0..1.0, so we need to add an stage depending on the color space
return _cmsReadFloatInputTag(hProfile, tagFloat);
}
// Revert to perceptual if no tag is found
if (!cmsIsTag(hProfile, tag16)) {
tag16 = Device2PCS16[0];
}
if (cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
// Check profile version and LUT type. Do the necessary adjustments if needed
// First read the tag
cmsPipeline* Lut = (cmsPipeline*) cmsReadTag(hProfile, tag16);
if (Lut == NULL) return NULL;
// After reading it, we have now info about the original type
OriginalType = _cmsGetTagTrueType(hProfile, tag16);
// The profile owns the Lut, so we need to copy it
Lut = cmsPipelineDup(Lut);
// We need to adjust data only for Lab16 on output
if (OriginalType != cmsSigLut16Type || cmsGetPCS(hProfile) != cmsSigLabData)
return Lut;
// If the input is Lab, add also a conversion at the begin
if (cmsGetColorSpace(hProfile) == cmsSigLabData &&
!cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID)))
goto Error;
// Add a matrix for conversion V2 to V4 Lab PCS
if (!cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID)))
goto Error;
return Lut;
Error:
cmsPipelineFree(Lut);
return NULL;
}
}
// Lut was not found, try to create a matrix-shaper
// Check if this is a grayscale profile.
if (cmsGetColorSpace(hProfile) == cmsSigGrayData) {
// if so, build appropriate conversion tables.
// The tables are the PCS iluminant, scaled across GrayTRC
return BuildGrayInputMatrixPipeline(hProfile);
}
// Not gray, create a normal matrix-shaper
return BuildRGBInputMatrixShaper(hProfile);
}
/**
* cd_util_create_named_color:
**/
static gboolean
cd_util_create_named_color (CdUtilPrivate *priv,
CdDom *dom,
const GNode *root,
GError **error)
{
CdColorLab lab;
cmsNAMEDCOLORLIST *nc2 = NULL;
cmsUInt16Number pcs[3];
const GNode *name;
const GNode *named;
const GNode *prefix;
const GNode *suffix;
const GNode *tmp;
gboolean ret = TRUE;
priv->lcms_profile = cmsCreateNULLProfileTHR (cd_icc_get_context (priv->icc));
if (priv->lcms_profile == NULL) {
ret = FALSE;
g_set_error_literal (error, 1, 0,
"failed to create NULL profile");
goto out;
}
cmsSetDeviceClass(priv->lcms_profile, cmsSigNamedColorClass);
cmsSetPCS (priv->lcms_profile, cmsSigLabData);
cmsSetColorSpace (priv->lcms_profile, cmsSigLabData);
/* create a named color structure */
prefix = cd_dom_get_node (dom, root, "prefix");
suffix = cd_dom_get_node (dom, root, "suffix");
nc2 = cmsAllocNamedColorList (NULL, 1, /* will realloc more as required */
3,
prefix != NULL ? cd_dom_get_node_data (prefix) : "",
suffix != NULL ? cd_dom_get_node_data (suffix) : "");
named = cd_dom_get_node (dom, root, "named");
if (named == NULL) {
ret = FALSE;
g_set_error_literal (error, 1, 0,
"XML error: missing named");
goto out;
}
for (tmp = named->children; tmp != NULL; tmp = tmp->next) {
name = cd_dom_get_node (dom, tmp, "name");
if (name == NULL) {
ret = FALSE;
g_set_error_literal (error, 1, 0,
"XML error: missing name");
goto out;
}
ret = cd_dom_get_node_lab (tmp, &lab);
if (!ret) {
ret = FALSE;
g_set_error (error, 1, 0,
"XML error: missing Lab for %s",
cd_dom_get_node_data (name));
goto out;
}
/* PCS = colours in PCS colour space CIE*Lab
* colorant = colours in device colour space */
cmsFloat2LabEncoded (pcs, (cmsCIELab *) &lab);
ret = cmsAppendNamedColor (nc2, cd_dom_get_node_data (name), pcs, pcs);
g_assert (ret);
}
cmsWriteTag (priv->lcms_profile, cmsSigNamedColor2Tag, nc2);
out:
if (nc2 != NULL)
cmsFreeNamedColorList (nc2);
return ret;
}
static
void FreeNamedColorList(cmsStage* mpe)
{
cmsNAMEDCOLORLIST* List = (cmsNAMEDCOLORLIST*) mpe ->Data;
cmsFreeNamedColorList(List);
}
cmsHPROFILE LCMSEXPORT cmsTransform2DeviceLink(cmsHTRANSFORM hTransform, DWORD dwFlags)
{
cmsHPROFILE hICC;
_LPcmsTRANSFORM v = (_LPcmsTRANSFORM) hTransform;
LPLUT Lut;
LCMSBOOL MustFreeLUT;
LPcmsNAMEDCOLORLIST InputColorant = NULL;
LPcmsNAMEDCOLORLIST OutputColorant = NULL;
// Check if is a named color transform
if (cmsGetDeviceClass(v ->InputProfile) == icSigNamedColorClass) {
return CreateNamedColorDevicelink(hTransform);
}
if (v ->DeviceLink) {
Lut = v -> DeviceLink;
MustFreeLUT = FALSE;
}
else {
Lut = _cmsPrecalculateDeviceLink(hTransform, dwFlags);
if (!Lut) return NULL;
MustFreeLUT = TRUE;
}
hICC = _cmsCreateProfilePlaceholder();
if (!hICC) { // can't allocate
if (MustFreeLUT) cmsFreeLUT(Lut);
return NULL;
}
FixColorSpaces(hICC, v -> EntryColorSpace, v -> ExitColorSpace, dwFlags);
cmsSetRenderingIntent(hICC, v -> Intent);
// Implement devicelink profile using following tags:
//
// 1 icSigProfileDescriptionTag
// 2 icSigMediaWhitePointTag
// 3 icSigAToB0Tag
cmsAddTag(hICC, icSigDeviceMfgDescTag, (LPVOID) "LittleCMS");
cmsAddTag(hICC, icSigProfileDescriptionTag, (LPVOID) "Device link");
cmsAddTag(hICC, icSigDeviceModelDescTag, (LPVOID) "Device link");
cmsAddTag(hICC, icSigMediaWhitePointTag, (LPVOID) cmsD50_XYZ());
if (cmsGetDeviceClass(hICC) == icSigOutputClass) {
cmsAddTag(hICC, icSigBToA0Tag, (LPVOID) Lut);
}
else
cmsAddTag(hICC, icSigAToB0Tag, (LPVOID) Lut);
// Try to read input and output colorant table
if (cmsIsTag(v ->InputProfile, icSigColorantTableTag)) {
// Input table can only come in this way.
InputColorant = cmsReadColorantTable(v ->InputProfile, icSigColorantTableTag);
}
// Output is a little bit more complex.
if (cmsGetDeviceClass(v ->OutputProfile) == icSigLinkClass) {
// This tag may exist only on devicelink profiles.
if (cmsIsTag(v ->OutputProfile, icSigColorantTableOutTag)) {
OutputColorant = cmsReadColorantTable(v ->OutputProfile, icSigColorantTableOutTag);
}
} else {
if (cmsIsTag(v ->OutputProfile, icSigColorantTableTag)) {
OutputColorant = cmsReadColorantTable(v ->OutputProfile, icSigColorantTableTag);
}
}
if (InputColorant)
cmsAddTag(hICC, icSigColorantTableTag, InputColorant);
if (OutputColorant)
cmsAddTag(hICC, icSigColorantTableOutTag, OutputColorant);
if (MustFreeLUT) cmsFreeLUT(Lut);
if (InputColorant) cmsFreeNamedColorList(InputColorant);
if (OutputColorant) cmsFreeNamedColorList(OutputColorant);
return hICC;
}
// Read and create a BRAND NEW MPE LUT from a given profile. All stuff dependent of version, etc
// is adjusted here in order to create a LUT that takes care of all those details
cmsPipeline* _cmsReadInputLUT(cmsHPROFILE hProfile, int Intent)
{
cmsTagTypeSignature OriginalType;
cmsTagSignature tag16 = Device2PCS16[Intent];
cmsTagSignature tagFloat = Device2PCSFloat[Intent];
cmsContext ContextID = cmsGetProfileContextID(hProfile);
// On named color, take the appropiate tag
if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
cmsPipeline* Lut;
cmsNAMEDCOLORLIST* nc = (cmsNAMEDCOLORLIST*) cmsReadTag(hProfile, cmsSigNamedColor2Tag);
if (nc == NULL) return NULL;
Lut = cmsPipelineAlloc(ContextID, 0, 0);
if (Lut == NULL) {
cmsFreeNamedColorList(nc);
return NULL;
}
cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocNamedColor(nc, TRUE));
cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID));
return Lut;
}
if (cmsIsTag(hProfile, tagFloat)) { // Float tag takes precedence
// Floating point LUT are always V4, so no adjustment is required
return cmsPipelineDup((cmsPipeline*) cmsReadTag(hProfile, tagFloat));
}
// Revert to perceptual if no tag is found
if (!cmsIsTag(hProfile, tag16)) {
tag16 = Device2PCS16[0];
}
if (cmsIsTag(hProfile, tag16)) { // Is there any LUT-Based table?
// Check profile version and LUT type. Do the necessary adjustments if needed
// First read the tag
cmsPipeline* Lut = (cmsPipeline*) cmsReadTag(hProfile, tag16);
if (Lut == NULL) return NULL;
// After reading it, we have now info about the original type
OriginalType = _cmsGetTagTrueType(hProfile, tag16);
// The profile owns the Lut, so we need to copy it
Lut = cmsPipelineDup(Lut);
// We need to adjust data only for Lab16 on output
if (OriginalType != cmsSigLut16Type || cmsGetPCS(hProfile) != cmsSigLabData)
return Lut;
// If the input is Lab, add also a conversion at the begin
if (cmsGetColorSpace(hProfile) == cmsSigLabData)
cmsPipelineInsertStage(Lut, cmsAT_BEGIN, _cmsStageAllocLabV4ToV2(ContextID));
// Add a matrix for conversion V2 to V4 Lab PCS
cmsPipelineInsertStage(Lut, cmsAT_END, _cmsStageAllocLabV2ToV4(ContextID));
return Lut;
}
// Lut was not found, try to create a matrix-shaper
// Check if this is a grayscale profile.
if (cmsGetColorSpace(hProfile) == cmsSigGrayData) {
// if so, build appropiate conversion tables.
// The tables are the PCS iluminant, scaled across GrayTRC
return BuildGrayInputMatrixPipeline(hProfile);
}
// Not gray, create a normal matrix-shaper
return BuildRGBInputMatrixShaper(hProfile);
}