chromium/third_party/pdfium/third_party/lcms/src/cmsvirt.c

//---------------------------------------------------------------------------------
//
//  Little Color Management System
//  Copyright (c) 1998-2023 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"

// Virtual (built-in) profiles
// -----------------------------------------------------------------------------------

static
cmsBool SetTextTags(cmsHPROFILE hProfile, const wchar_t* Description)
{ … }


static
cmsBool  SetSeqDescTag(cmsHPROFILE hProfile, const char* Model)
{ … }



// This function creates a profile based on White point, primaries and
// transfer functions.
cmsHPROFILE CMSEXPORT cmsCreateRGBProfileTHR(cmsContext ContextID,
                                          const cmsCIExyY* WhitePoint,
                                          const cmsCIExyYTRIPLE* Primaries,
                                          cmsToneCurve* const TransferFunction[3])
{ … }

cmsHPROFILE CMSEXPORT cmsCreateRGBProfile(const cmsCIExyY* WhitePoint,
                                          const cmsCIExyYTRIPLE* Primaries,
                                          cmsToneCurve* const TransferFunction[3])
{ … }



// This function creates a profile based on White point and transfer function.
cmsHPROFILE CMSEXPORT cmsCreateGrayProfileTHR(cmsContext ContextID,
                                           const cmsCIExyY* WhitePoint,
                                           const cmsToneCurve* TransferFunction)
{ … }



cmsHPROFILE CMSEXPORT cmsCreateGrayProfile(const cmsCIExyY* WhitePoint,
                                                    const cmsToneCurve* TransferFunction)
{ … }

// This is a devicelink operating in the target colorspace with as many transfer functions as components

cmsHPROFILE CMSEXPORT cmsCreateLinearizationDeviceLinkTHR(cmsContext ContextID,
                                                          cmsColorSpaceSignature ColorSpace,
                                                          cmsToneCurve* const TransferFunctions[])
{ … }

cmsHPROFILE CMSEXPORT cmsCreateLinearizationDeviceLink(cmsColorSpaceSignature ColorSpace,
                                                                 cmsToneCurve* const TransferFunctions[])
{ … }

// Ink-limiting algorithm
//
//  Sum = C + M + Y + K
//  If Sum > InkLimit
//        Ratio= 1 - (Sum - InkLimit) / (C + M + Y)
//        if Ratio <0
//              Ratio=0
//        endif
//     Else
//         Ratio=1
//     endif
//
//     C = Ratio * C
//     M = Ratio * M
//     Y = Ratio * Y
//     K: Does not change

static
int InkLimitingSampler(CMSREGISTER const cmsUInt16Number In[], CMSREGISTER cmsUInt16Number Out[], CMSREGISTER void* Cargo)
{ … }

// This is a devicelink operating in CMYK for ink-limiting

cmsHPROFILE CMSEXPORT cmsCreateInkLimitingDeviceLinkTHR(cmsContext ContextID,
                                                     cmsColorSpaceSignature ColorSpace,
                                                     cmsFloat64Number Limit)
{ … }

cmsHPROFILE CMSEXPORT cmsCreateInkLimitingDeviceLink(cmsColorSpaceSignature ColorSpace, cmsFloat64Number Limit)
{ … }


// Creates a fake Lab identity.
cmsHPROFILE CMSEXPORT cmsCreateLab2ProfileTHR(cmsContext ContextID, const cmsCIExyY* WhitePoint)
{ … }


cmsHPROFILE CMSEXPORT cmsCreateLab2Profile(const cmsCIExyY* WhitePoint)
{ … }


// Creates a fake Lab V4 identity.
cmsHPROFILE CMSEXPORT cmsCreateLab4ProfileTHR(cmsContext ContextID, const cmsCIExyY* WhitePoint)
{ … }

cmsHPROFILE CMSEXPORT cmsCreateLab4Profile(const cmsCIExyY* WhitePoint)
{ … }


// Creates a fake XYZ identity
cmsHPROFILE CMSEXPORT cmsCreateXYZProfileTHR(cmsContext ContextID)
{ … }


cmsHPROFILE CMSEXPORT cmsCreateXYZProfile(void)
{ … }


//sRGB Curves are defined by:
//
//If  R'sRGB,G'sRGB, B'sRGB < 0.04045
//
//    R =  R'sRGB / 12.92
//    G =  G'sRGB / 12.92
//    B =  B'sRGB / 12.92
//
//
//else if  R'sRGB,G'sRGB, B'sRGB >= 0.04045
//
//    R = ((R'sRGB + 0.055) / 1.055)^2.4
//    G = ((G'sRGB + 0.055) / 1.055)^2.4
//    B = ((B'sRGB + 0.055) / 1.055)^2.4

static
cmsToneCurve* Build_sRGBGamma(cmsContext ContextID)
{ … }

// Create the ICC virtual profile for sRGB space
cmsHPROFILE CMSEXPORT cmsCreate_sRGBProfileTHR(cmsContext ContextID)
{ … }

cmsHPROFILE CMSEXPORT cmsCreate_sRGBProfile(void)
{ … }



LPBCHSWADJUSTS;


static
int bchswSampler(CMSREGISTER const cmsUInt16Number In[], CMSREGISTER cmsUInt16Number Out[], CMSREGISTER void* Cargo)
{ … }


// Creates an abstract profile operating in Lab space for Brightness,
// contrast, Saturation and white point displacement

cmsHPROFILE CMSEXPORT cmsCreateBCHSWabstractProfileTHR(cmsContext ContextID,
                                                       cmsUInt32Number nLUTPoints,
                                                       cmsFloat64Number Bright,
                                                       cmsFloat64Number Contrast,
                                                       cmsFloat64Number Hue,
                                                       cmsFloat64Number Saturation,
                                                       cmsUInt32Number TempSrc,
                                                       cmsUInt32Number TempDest)
{ … }


CMSAPI cmsHPROFILE   CMSEXPORT cmsCreateBCHSWabstractProfile(cmsUInt32Number nLUTPoints,
                                                             cmsFloat64Number Bright,
                                                             cmsFloat64Number Contrast,
                                                             cmsFloat64Number Hue,
                                                             cmsFloat64Number Saturation,
                                                             cmsUInt32Number TempSrc,
                                                             cmsUInt32Number TempDest)
{ … }


// Creates a fake NULL profile. This profile return 1 channel as always 0.
// Is useful only for gamut checking tricks
cmsHPROFILE CMSEXPORT cmsCreateNULLProfileTHR(cmsContext ContextID)
{ … }

cmsHPROFILE CMSEXPORT cmsCreateNULLProfile(void)
{ … }


static
int IsPCS(cmsColorSpaceSignature ColorSpace)
{ … }


static
void FixColorSpaces(cmsHPROFILE hProfile,
                              cmsColorSpaceSignature ColorSpace,
                              cmsColorSpaceSignature PCS,
                              cmsUInt32Number dwFlags)
{ … }



// 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)
{ … }


// This structure holds information about which MPU can be stored on a profile based on the version

cmsAllowedLUT;

#define cmsSig0 … 

static const cmsAllowedLUT AllowedLUTTypes[] = …;

#define SIZE_OF_ALLOWED_LUT …

// Check a single entry
static
cmsBool CheckOne(const cmsAllowedLUT* Tab, const cmsPipeline* Lut)
{ … }


static
const cmsAllowedLUT* FindCombination(const cmsPipeline* Lut, cmsBool IsV4, cmsTagSignature DestinationTag)
{ … }


// Does convert a transform into a device link profile
cmsHPROFILE CMSEXPORT cmsTransform2DeviceLink(cmsHTRANSFORM hTransform, cmsFloat64Number Version, cmsUInt32Number dwFlags)
{ … }