//--------------------------------------------------------------------------------- // // Little Color Management System // Copyright (c) 1998-2016 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" // Generic I/O, tag dictionary management, profile struct // IOhandlers are abstractions used by littleCMS to read from whatever file, stream, // memory block or any storage. Each IOhandler provides implementations for read, // write, seek and tell functions. LittleCMS code deals with IO across those objects. // In this way, is easier to add support for new storage media. // NULL stream, for taking care of used space ------------------------------------- // NULL IOhandler basically does nothing but keep track on how many bytes have been // written. This is handy when creating profiles, where the file size is needed in the // header. Then, whole profile is serialized across NULL IOhandler and a second pass // writes the bytes to the pertinent IOhandler. typedef struct { cmsUInt32Number Pointer; // Points to current location } FILENULL; static cmsUInt32Number NULLRead(cmsIOHANDLER* iohandler, void *Buffer, cmsUInt32Number size, cmsUInt32Number count) { FILENULL* ResData = (FILENULL*) iohandler ->stream; cmsUInt32Number len = size * count; ResData -> Pointer += len; return count; cmsUNUSED_PARAMETER(Buffer); } static cmsBool NULLSeek(cmsIOHANDLER* iohandler, cmsUInt32Number offset) { FILENULL* ResData = (FILENULL*) iohandler ->stream; ResData ->Pointer = offset; return TRUE; } static cmsUInt32Number NULLTell(cmsIOHANDLER* iohandler) { FILENULL* ResData = (FILENULL*) iohandler ->stream; return ResData -> Pointer; } static cmsBool NULLWrite(cmsIOHANDLER* iohandler, cmsUInt32Number size, const void *Ptr) { FILENULL* ResData = (FILENULL*) iohandler ->stream; ResData ->Pointer += size; if (ResData ->Pointer > iohandler->UsedSpace) iohandler->UsedSpace = ResData ->Pointer; return TRUE; cmsUNUSED_PARAMETER(Ptr); } static cmsBool NULLClose(cmsIOHANDLER* iohandler) { FILENULL* ResData = (FILENULL*) iohandler ->stream; _cmsFree(iohandler ->ContextID, ResData); _cmsFree(iohandler ->ContextID, iohandler); return TRUE; } // The NULL IOhandler creator cmsIOHANDLER* CMSEXPORT cmsOpenIOhandlerFromNULL(cmsContext ContextID) { struct _cms_io_handler* iohandler = NULL; FILENULL* fm = NULL; iohandler = (struct _cms_io_handler*) _cmsMallocZero(ContextID, sizeof(struct _cms_io_handler)); if (iohandler == NULL) return NULL; fm = (FILENULL*) _cmsMallocZero(ContextID, sizeof(FILENULL)); if (fm == NULL) goto Error; fm ->Pointer = 0; iohandler ->ContextID = ContextID; iohandler ->stream = (void*) fm; iohandler ->UsedSpace = 0; iohandler ->ReportedSize = 0; iohandler ->PhysicalFile[0] = 0; iohandler ->Read = NULLRead; iohandler ->Seek = NULLSeek; iohandler ->Close = NULLClose; iohandler ->Tell = NULLTell; iohandler ->Write = NULLWrite; return iohandler; Error: if (iohandler) _cmsFree(ContextID, iohandler); return NULL; } // Memory-based stream -------------------------------------------------------------- // Those functions implements an iohandler which takes a block of memory as storage medium. typedef struct { cmsUInt8Number* Block; // Points to allocated memory cmsUInt32Number Size; // Size of allocated memory cmsUInt32Number Pointer; // Points to current location int FreeBlockOnClose; // As title } FILEMEM; static cmsUInt32Number MemoryRead(struct _cms_io_handler* iohandler, void *Buffer, cmsUInt32Number size, cmsUInt32Number count) { FILEMEM* ResData = (FILEMEM*) iohandler ->stream; cmsUInt8Number* Ptr; cmsUInt32Number len = size * count; if (ResData -> Pointer + len > ResData -> Size){ len = (ResData -> Size - ResData -> Pointer); cmsSignalError(iohandler ->ContextID, cmsERROR_READ, "Read from memory error. Got %d bytes, block should be of %d bytes", len, count * size); return 0; } Ptr = ResData -> Block; Ptr += ResData -> Pointer; memmove(Buffer, Ptr, len); ResData -> Pointer += len; return count; } // SEEK_CUR is assumed static cmsBool MemorySeek(struct _cms_io_handler* iohandler, cmsUInt32Number offset) { FILEMEM* ResData = (FILEMEM*) iohandler ->stream; if (offset > ResData ->Size) { cmsSignalError(iohandler ->ContextID, cmsERROR_SEEK, "Too few data; probably corrupted profile"); return FALSE; } ResData ->Pointer = offset; return TRUE; } // Tell for memory static cmsUInt32Number MemoryTell(struct _cms_io_handler* iohandler) { FILEMEM* ResData = (FILEMEM*) iohandler ->stream; if (ResData == NULL) return 0; return ResData -> Pointer; } // Writes data to memory, also keeps used space for further reference. static cmsBool MemoryWrite(struct _cms_io_handler* iohandler, cmsUInt32Number size, const void *Ptr) { FILEMEM* ResData = (FILEMEM*) iohandler ->stream; if (ResData == NULL) return FALSE; // Housekeeping // Check for available space. Clip. if (ResData->Pointer + size > ResData->Size) { size = ResData ->Size - ResData->Pointer; } if (size == 0) return TRUE; // Write zero bytes is ok, but does nothing memmove(ResData ->Block + ResData ->Pointer, Ptr, size); ResData ->Pointer += size; if (ResData ->Pointer > iohandler->UsedSpace) iohandler->UsedSpace = ResData ->Pointer; return TRUE; } static cmsBool MemoryClose(struct _cms_io_handler* iohandler) { FILEMEM* ResData = (FILEMEM*) iohandler ->stream; if (ResData ->FreeBlockOnClose) { if (ResData ->Block) _cmsFree(iohandler ->ContextID, ResData ->Block); } _cmsFree(iohandler ->ContextID, ResData); _cmsFree(iohandler ->ContextID, iohandler); return TRUE; } // Create a iohandler for memory block. AccessMode=='r' assumes the iohandler is going to read, and makes // a copy of the memory block for letting user to free the memory after invoking open profile. In write // mode ("w"), Buffere points to the begin of memory block to be written. cmsIOHANDLER* CMSEXPORT cmsOpenIOhandlerFromMem(cmsContext ContextID, void *Buffer, cmsUInt32Number size, const char* AccessMode) { cmsIOHANDLER* iohandler = NULL; FILEMEM* fm = NULL; _cmsAssert(AccessMode != NULL); iohandler = (cmsIOHANDLER*) _cmsMallocZero(ContextID, sizeof(cmsIOHANDLER)); if (iohandler == NULL) return NULL; switch (*AccessMode) { case 'r': fm = (FILEMEM*) _cmsMallocZero(ContextID, sizeof(FILEMEM)); if (fm == NULL) goto Error; if (Buffer == NULL) { cmsSignalError(ContextID, cmsERROR_READ, "Couldn't read profile from NULL pointer"); goto Error; } fm ->Block = (cmsUInt8Number*) _cmsMalloc(ContextID, size); if (fm ->Block == NULL) { _cmsFree(ContextID, fm); _cmsFree(ContextID, iohandler); cmsSignalError(ContextID, cmsERROR_READ, "Couldn't allocate %ld bytes for profile", size); return NULL; } memmove(fm->Block, Buffer, size); fm ->FreeBlockOnClose = TRUE; fm ->Size = size; fm ->Pointer = 0; iohandler -> ReportedSize = size; break; case 'w': fm = (FILEMEM*) _cmsMallocZero(ContextID, sizeof(FILEMEM)); if (fm == NULL) goto Error; fm ->Block = (cmsUInt8Number*) Buffer; fm ->FreeBlockOnClose = FALSE; fm ->Size = size; fm ->Pointer = 0; iohandler -> ReportedSize = 0; break; default: cmsSignalError(ContextID, cmsERROR_UNKNOWN_EXTENSION, "Unknown access mode '%c'", *AccessMode); return NULL; } iohandler ->ContextID = ContextID; iohandler ->stream = (void*) fm; iohandler ->UsedSpace = 0; iohandler ->PhysicalFile[0] = 0; iohandler ->Read = MemoryRead; iohandler ->Seek = MemorySeek; iohandler ->Close = MemoryClose; iohandler ->Tell = MemoryTell; iohandler ->Write = MemoryWrite; return iohandler; Error: if (fm) _cmsFree(ContextID, fm); if (iohandler) _cmsFree(ContextID, iohandler); return NULL; } // File-based stream ------------------------------------------------------- // Read count elements of size bytes each. Return number of elements read static cmsUInt32Number FileRead(cmsIOHANDLER* iohandler, void *Buffer, cmsUInt32Number size, cmsUInt32Number count) { cmsUInt32Number nReaded = (cmsUInt32Number) fread(Buffer, size, count, (FILE*) iohandler->stream); if (nReaded != count) { cmsSignalError(iohandler ->ContextID, cmsERROR_FILE, "Read error. Got %d bytes, block should be of %d bytes", nReaded * size, count * size); return 0; } return nReaded; } // Position file pointer in the file static cmsBool FileSeek(cmsIOHANDLER* iohandler, cmsUInt32Number offset) { if (fseek((FILE*) iohandler ->stream, (long) offset, SEEK_SET) != 0) { cmsSignalError(iohandler ->ContextID, cmsERROR_FILE, "Seek error; probably corrupted file"); return FALSE; } return TRUE; } // Returns file pointer position static cmsUInt32Number FileTell(cmsIOHANDLER* iohandler) { return (cmsUInt32Number) ftell((FILE*)iohandler ->stream); } // Writes data to stream, also keeps used space for further reference. Returns TRUE on success, FALSE on error static cmsBool FileWrite(cmsIOHANDLER* iohandler, cmsUInt32Number size, const void* Buffer) { if (size == 0) return TRUE; // We allow to write 0 bytes, but nothing is written iohandler->UsedSpace += size; return (fwrite(Buffer, size, 1, (FILE*) iohandler->stream) == 1); } // Closes the file static cmsBool FileClose(cmsIOHANDLER* iohandler) { if (fclose((FILE*) iohandler ->stream) != 0) return FALSE; _cmsFree(iohandler ->ContextID, iohandler); return TRUE; } // Create a iohandler for disk based files. cmsIOHANDLER* CMSEXPORT cmsOpenIOhandlerFromFile(cmsContext ContextID, const char* FileName, const char* AccessMode) { cmsIOHANDLER* iohandler = NULL; FILE* fm = NULL; cmsInt32Number fileLen; _cmsAssert(FileName != NULL); _cmsAssert(AccessMode != NULL); iohandler = (cmsIOHANDLER*) _cmsMallocZero(ContextID, sizeof(cmsIOHANDLER)); if (iohandler == NULL) return NULL; switch (*AccessMode) { case 'r': fm = fopen(FileName, "rb"); if (fm == NULL) { _cmsFree(ContextID, iohandler); cmsSignalError(ContextID, cmsERROR_FILE, "File '%s' not found", FileName); return NULL; } fileLen = cmsfilelength(fm); if (fileLen < 0) { fclose(fm); _cmsFree(ContextID, iohandler); cmsSignalError(ContextID, cmsERROR_FILE, "Cannot get size of file '%s'", FileName); return NULL; } iohandler -> ReportedSize = (cmsUInt32Number) fileLen; break; case 'w': fm = fopen(FileName, "wb"); if (fm == NULL) { _cmsFree(ContextID, iohandler); cmsSignalError(ContextID, cmsERROR_FILE, "Couldn't create '%s'", FileName); return NULL; } iohandler -> ReportedSize = 0; break; default: _cmsFree(ContextID, iohandler); cmsSignalError(ContextID, cmsERROR_FILE, "Unknown access mode '%c'", *AccessMode); return NULL; } iohandler ->ContextID = ContextID; iohandler ->stream = (void*) fm; iohandler ->UsedSpace = 0; // Keep track of the original file strncpy(iohandler -> PhysicalFile, FileName, sizeof(iohandler -> PhysicalFile)-1); iohandler -> PhysicalFile[sizeof(iohandler -> PhysicalFile)-1] = 0; iohandler ->Read = FileRead; iohandler ->Seek = FileSeek; iohandler ->Close = FileClose; iohandler ->Tell = FileTell; iohandler ->Write = FileWrite; return iohandler; } // Create a iohandler for stream based files cmsIOHANDLER* CMSEXPORT cmsOpenIOhandlerFromStream(cmsContext ContextID, FILE* Stream) { cmsIOHANDLER* iohandler = NULL; cmsInt32Number fileSize; fileSize = cmsfilelength(Stream); if (fileSize < 0) { cmsSignalError(ContextID, cmsERROR_FILE, "Cannot get size of stream"); return NULL; } iohandler = (cmsIOHANDLER*) _cmsMallocZero(ContextID, sizeof(cmsIOHANDLER)); if (iohandler == NULL) return NULL; iohandler -> ContextID = ContextID; iohandler -> stream = (void*) Stream; iohandler -> UsedSpace = 0; iohandler -> ReportedSize = (cmsUInt32Number) fileSize; iohandler -> PhysicalFile[0] = 0; iohandler ->Read = FileRead; iohandler ->Seek = FileSeek; iohandler ->Close = FileClose; iohandler ->Tell = FileTell; iohandler ->Write = FileWrite; return iohandler; } // Close an open IO handler cmsBool CMSEXPORT cmsCloseIOhandler(cmsIOHANDLER* io) { return io -> Close(io); } // ------------------------------------------------------------------------------------------------------- cmsIOHANDLER* CMSEXPORT cmsGetProfileIOhandler(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*)hProfile; if (Icc == NULL) return NULL; return Icc->IOhandler; } // Creates an empty structure holding all required parameters cmsHPROFILE CMSEXPORT cmsCreateProfilePlaceholder(cmsContext ContextID) { time_t now = time(NULL); _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) _cmsMallocZero(ContextID, sizeof(_cmsICCPROFILE)); if (Icc == NULL) return NULL; Icc ->ContextID = ContextID; // Set it to empty Icc -> TagCount = 0; // Set default version Icc ->Version = 0x02100000; // Set creation date/time memmove(&Icc ->Created, gmtime(&now), sizeof(Icc ->Created)); // Create a mutex if the user provided proper plugin. NULL otherwise Icc ->UsrMutex = _cmsCreateMutex(ContextID); // Return the handle return (cmsHPROFILE) Icc; } cmsContext CMSEXPORT cmsGetProfileContextID(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; if (Icc == NULL) return NULL; return Icc -> ContextID; } // Return the number of tags cmsInt32Number CMSEXPORT cmsGetTagCount(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; if (Icc == NULL) return -1; return Icc->TagCount; } // Return the tag signature of a given tag number cmsTagSignature CMSEXPORT cmsGetTagSignature(cmsHPROFILE hProfile, cmsUInt32Number n) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; if (n > Icc->TagCount) return (cmsTagSignature) 0; // Mark as not available if (n >= MAX_TABLE_TAG) return (cmsTagSignature) 0; // As double check return Icc ->TagNames[n]; } static int SearchOneTag(_cmsICCPROFILE* Profile, cmsTagSignature sig) { cmsUInt32Number i; for (i=0; i < Profile -> TagCount; i++) { if (sig == Profile -> TagNames[i]) return i; } return -1; } // Search for a specific tag in tag dictionary. Returns position or -1 if tag not found. // If followlinks is turned on, then the position of the linked tag is returned int _cmsSearchTag(_cmsICCPROFILE* Icc, cmsTagSignature sig, cmsBool lFollowLinks) { int n; cmsTagSignature LinkedSig; do { // Search for given tag in ICC profile directory n = SearchOneTag(Icc, sig); if (n < 0) return -1; // Not found if (!lFollowLinks) return n; // Found, don't follow links // Is this a linked tag? LinkedSig = Icc ->TagLinked[n]; // Yes, follow link if (LinkedSig != (cmsTagSignature) 0) { sig = LinkedSig; } } while (LinkedSig != (cmsTagSignature) 0); return n; } // Deletes a tag entry static void _cmsDeleteTagByPos(_cmsICCPROFILE* Icc, int i) { _cmsAssert(Icc != NULL); _cmsAssert(i >= 0); if (Icc -> TagPtrs[i] != NULL) { // Free previous version if (Icc ->TagSaveAsRaw[i]) { _cmsFree(Icc ->ContextID, Icc ->TagPtrs[i]); } else { cmsTagTypeHandler* TypeHandler = Icc ->TagTypeHandlers[i]; if (TypeHandler != NULL) { cmsTagTypeHandler LocalTypeHandler = *TypeHandler; LocalTypeHandler.ContextID = Icc ->ContextID; // As an additional parameter LocalTypeHandler.ICCVersion = Icc ->Version; LocalTypeHandler.FreePtr(&LocalTypeHandler, Icc -> TagPtrs[i]); Icc ->TagPtrs[i] = NULL; } } } } // Creates a new tag entry static cmsBool _cmsNewTag(_cmsICCPROFILE* Icc, cmsTagSignature sig, int* NewPos) { int i; // Search for the tag i = _cmsSearchTag(Icc, sig, FALSE); if (i >= 0) { // Already exists? delete it _cmsDeleteTagByPos(Icc, i); *NewPos = i; } else { // No, make a new one if (Icc -> TagCount >= MAX_TABLE_TAG) { cmsSignalError(Icc ->ContextID, cmsERROR_RANGE, "Too many tags (%d)", MAX_TABLE_TAG); return FALSE; } *NewPos = Icc ->TagCount; Icc -> TagCount++; } return TRUE; } // Check existence cmsBool CMSEXPORT cmsIsTag(cmsHPROFILE hProfile, cmsTagSignature sig) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) (void*) hProfile; return _cmsSearchTag(Icc, sig, FALSE) >= 0; } // Enforces that the profile version is per. spec. // Operates on the big endian bytes from the profile. // Called before converting to platform endianness. // Byte 0 is BCD major version, so max 9. // Byte 1 is 2 BCD digits, one per nibble. // Reserved bytes 2 & 3 must be 0. static cmsUInt32Number _validatedVersion(cmsUInt32Number DWord) { cmsUInt8Number* pByte = (cmsUInt8Number*) &DWord; cmsUInt8Number temp1; cmsUInt8Number temp2; if (*pByte > 0x09) *pByte = (cmsUInt8Number) 0x09; temp1 = *(pByte+1) & 0xf0; temp2 = *(pByte+1) & 0x0f; if (temp1 > 0x90) temp1 = 0x90; if (temp2 > 0x09) temp2 = 0x09; *(pByte+1) = (cmsUInt8Number)(temp1 | temp2); *(pByte+2) = (cmsUInt8Number)0; *(pByte+3) = (cmsUInt8Number)0; return DWord; } // Read profile header and validate it cmsBool _cmsReadHeader(_cmsICCPROFILE* Icc) { cmsTagEntry Tag; cmsICCHeader Header; cmsUInt32Number i, j; cmsUInt32Number HeaderSize; cmsIOHANDLER* io = Icc ->IOhandler; cmsUInt32Number TagCount; // Read the header if (io -> Read(io, &Header, sizeof(cmsICCHeader), 1) != 1) { return FALSE; } // Validate file as an ICC profile if (_cmsAdjustEndianess32(Header.magic) != cmsMagicNumber) { cmsSignalError(Icc ->ContextID, cmsERROR_BAD_SIGNATURE, "not an ICC profile, invalid signature"); return FALSE; } // Adjust endianness of the used parameters Icc -> DeviceClass = (cmsProfileClassSignature) _cmsAdjustEndianess32(Header.deviceClass); Icc -> ColorSpace = (cmsColorSpaceSignature) _cmsAdjustEndianess32(Header.colorSpace); Icc -> PCS = (cmsColorSpaceSignature) _cmsAdjustEndianess32(Header.pcs); Icc -> RenderingIntent = _cmsAdjustEndianess32(Header.renderingIntent); Icc -> flags = _cmsAdjustEndianess32(Header.flags); Icc -> manufacturer = _cmsAdjustEndianess32(Header.manufacturer); Icc -> model = _cmsAdjustEndianess32(Header.model); Icc -> creator = _cmsAdjustEndianess32(Header.creator); _cmsAdjustEndianess64(&Icc -> attributes, &Header.attributes); Icc -> Version = _cmsAdjustEndianess32(_validatedVersion(Header.version)); // Get size as reported in header HeaderSize = _cmsAdjustEndianess32(Header.size); // Make sure HeaderSize is lower than profile size if (HeaderSize >= Icc ->IOhandler ->ReportedSize) HeaderSize = Icc ->IOhandler ->ReportedSize; // Get creation date/time _cmsDecodeDateTimeNumber(&Header.date, &Icc ->Created); // The profile ID are 32 raw bytes memmove(Icc ->ProfileID.ID32, Header.profileID.ID32, 16); // Read tag directory if (!_cmsReadUInt32Number(io, &TagCount)) return FALSE; if (TagCount > MAX_TABLE_TAG) { cmsSignalError(Icc ->ContextID, cmsERROR_RANGE, "Too many tags (%d)", TagCount); return FALSE; } // Read tag directory Icc -> TagCount = 0; for (i=0; i < TagCount; i++) { if (!_cmsReadUInt32Number(io, (cmsUInt32Number *) &Tag.sig)) return FALSE; if (!_cmsReadUInt32Number(io, &Tag.offset)) return FALSE; if (!_cmsReadUInt32Number(io, &Tag.size)) return FALSE; // Perform some sanity check. Offset + size should fall inside file. if (Tag.offset + Tag.size > HeaderSize || Tag.offset + Tag.size < Tag.offset) continue; Icc -> TagNames[Icc ->TagCount] = Tag.sig; Icc -> TagOffsets[Icc ->TagCount] = Tag.offset; Icc -> TagSizes[Icc ->TagCount] = Tag.size; // Search for links for (j=0; j < Icc ->TagCount; j++) { if ((Icc ->TagOffsets[j] == Tag.offset) && (Icc ->TagSizes[j] == Tag.size)) { Icc ->TagLinked[Icc ->TagCount] = Icc ->TagNames[j]; } } Icc ->TagCount++; } return TRUE; } // Saves profile header cmsBool _cmsWriteHeader(_cmsICCPROFILE* Icc, cmsUInt32Number UsedSpace) { cmsICCHeader Header; cmsUInt32Number i; cmsTagEntry Tag; cmsInt32Number Count = 0; Header.size = _cmsAdjustEndianess32(UsedSpace); Header.cmmId = _cmsAdjustEndianess32(lcmsSignature); Header.version = _cmsAdjustEndianess32(Icc ->Version); Header.deviceClass = (cmsProfileClassSignature) _cmsAdjustEndianess32(Icc -> DeviceClass); Header.colorSpace = (cmsColorSpaceSignature) _cmsAdjustEndianess32(Icc -> ColorSpace); Header.pcs = (cmsColorSpaceSignature) _cmsAdjustEndianess32(Icc -> PCS); // NOTE: in v4 Timestamp must be in UTC rather than in local time _cmsEncodeDateTimeNumber(&Header.date, &Icc ->Created); Header.magic = _cmsAdjustEndianess32(cmsMagicNumber); #ifdef CMS_IS_WINDOWS_ Header.platform = (cmsPlatformSignature) _cmsAdjustEndianess32(cmsSigMicrosoft); #else Header.platform = (cmsPlatformSignature) _cmsAdjustEndianess32(cmsSigMacintosh); #endif Header.flags = _cmsAdjustEndianess32(Icc -> flags); Header.manufacturer = _cmsAdjustEndianess32(Icc -> manufacturer); Header.model = _cmsAdjustEndianess32(Icc -> model); _cmsAdjustEndianess64(&Header.attributes, &Icc -> attributes); // Rendering intent in the header (for embedded profiles) Header.renderingIntent = _cmsAdjustEndianess32(Icc -> RenderingIntent); // Illuminant is always D50 Header.illuminant.X = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(cmsD50_XYZ()->X)); Header.illuminant.Y = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(cmsD50_XYZ()->Y)); Header.illuminant.Z = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(cmsD50_XYZ()->Z)); // Created by LittleCMS (that's me!) Header.creator = _cmsAdjustEndianess32(lcmsSignature); memset(&Header.reserved, 0, sizeof(Header.reserved)); // Set profile ID. Endianness is always big endian memmove(&Header.profileID, &Icc ->ProfileID, 16); // Dump the header if (!Icc -> IOhandler->Write(Icc->IOhandler, sizeof(cmsICCHeader), &Header)) return FALSE; // Saves Tag directory // Get true count for (i=0; i < Icc -> TagCount; i++) { if (Icc ->TagNames[i] != (cmsTagSignature) 0) Count++; } // Store number of tags if (!_cmsWriteUInt32Number(Icc ->IOhandler, Count)) return FALSE; for (i=0; i < Icc -> TagCount; i++) { if (Icc ->TagNames[i] == (cmsTagSignature) 0) continue; // It is just a placeholder Tag.sig = (cmsTagSignature) _cmsAdjustEndianess32((cmsInt32Number) Icc -> TagNames[i]); Tag.offset = _cmsAdjustEndianess32((cmsInt32Number) Icc -> TagOffsets[i]); Tag.size = _cmsAdjustEndianess32((cmsInt32Number) Icc -> TagSizes[i]); if (!Icc ->IOhandler -> Write(Icc-> IOhandler, sizeof(cmsTagEntry), &Tag)) return FALSE; } return TRUE; } // ----------------------------------------------------------------------- Set/Get several struct members cmsUInt32Number CMSEXPORT cmsGetHeaderRenderingIntent(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return Icc -> RenderingIntent; } void CMSEXPORT cmsSetHeaderRenderingIntent(cmsHPROFILE hProfile, cmsUInt32Number RenderingIntent) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; Icc -> RenderingIntent = RenderingIntent; } cmsUInt32Number CMSEXPORT cmsGetHeaderFlags(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return (cmsUInt32Number) Icc -> flags; } void CMSEXPORT cmsSetHeaderFlags(cmsHPROFILE hProfile, cmsUInt32Number Flags) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; Icc -> flags = (cmsUInt32Number) Flags; } cmsUInt32Number CMSEXPORT cmsGetHeaderManufacturer(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return Icc ->manufacturer; } void CMSEXPORT cmsSetHeaderManufacturer(cmsHPROFILE hProfile, cmsUInt32Number manufacturer) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; Icc -> manufacturer = manufacturer; } cmsUInt32Number CMSEXPORT cmsGetHeaderCreator(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return Icc ->creator; } cmsUInt32Number CMSEXPORT cmsGetHeaderModel(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return Icc ->model; } void CMSEXPORT cmsSetHeaderModel(cmsHPROFILE hProfile, cmsUInt32Number model) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; Icc -> model = model; } void CMSEXPORT cmsGetHeaderAttributes(cmsHPROFILE hProfile, cmsUInt64Number* Flags) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; memmove(Flags, &Icc -> attributes, sizeof(cmsUInt64Number)); } void CMSEXPORT cmsSetHeaderAttributes(cmsHPROFILE hProfile, cmsUInt64Number Flags) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; memmove(&Icc -> attributes, &Flags, sizeof(cmsUInt64Number)); } void CMSEXPORT cmsGetHeaderProfileID(cmsHPROFILE hProfile, cmsUInt8Number* ProfileID) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; memmove(ProfileID, Icc ->ProfileID.ID8, 16); } void CMSEXPORT cmsSetHeaderProfileID(cmsHPROFILE hProfile, cmsUInt8Number* ProfileID) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; memmove(&Icc -> ProfileID, ProfileID, 16); } cmsBool CMSEXPORT cmsGetHeaderCreationDateTime(cmsHPROFILE hProfile, struct tm *Dest) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; memmove(Dest, &Icc ->Created, sizeof(struct tm)); return TRUE; } cmsColorSpaceSignature CMSEXPORT cmsGetPCS(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return Icc -> PCS; } void CMSEXPORT cmsSetPCS(cmsHPROFILE hProfile, cmsColorSpaceSignature pcs) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; Icc -> PCS = pcs; } cmsColorSpaceSignature CMSEXPORT cmsGetColorSpace(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return Icc -> ColorSpace; } void CMSEXPORT cmsSetColorSpace(cmsHPROFILE hProfile, cmsColorSpaceSignature sig) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; Icc -> ColorSpace = sig; } cmsProfileClassSignature CMSEXPORT cmsGetDeviceClass(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return Icc -> DeviceClass; } void CMSEXPORT cmsSetDeviceClass(cmsHPROFILE hProfile, cmsProfileClassSignature sig) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; Icc -> DeviceClass = sig; } cmsUInt32Number CMSEXPORT cmsGetEncodedICCversion(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; return Icc -> Version; } void CMSEXPORT cmsSetEncodedICCversion(cmsHPROFILE hProfile, cmsUInt32Number Version) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; Icc -> Version = Version; } // Get an hexadecimal number with same digits as v static cmsUInt32Number BaseToBase(cmsUInt32Number in, int BaseIn, int BaseOut) { char Buff[100]; int i, len; cmsUInt32Number out; for (len=0; in > 0 && len < 100; len++) { Buff[len] = (char) (in % BaseIn); in /= BaseIn; } for (i=len-1, out=0; i >= 0; --i) { out = out * BaseOut + Buff[i]; } return out; } void CMSEXPORT cmsSetProfileVersion(cmsHPROFILE hProfile, cmsFloat64Number Version) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; // 4.2 -> 0x4200000 Icc -> Version = BaseToBase((cmsUInt32Number) floor(Version * 100.0 + 0.5), 10, 16) << 16; } cmsFloat64Number CMSEXPORT cmsGetProfileVersion(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; cmsUInt32Number n = Icc -> Version >> 16; return BaseToBase(n, 16, 10) / 100.0; } // -------------------------------------------------------------------------------------------------------------- // Create profile from IOhandler cmsHPROFILE CMSEXPORT cmsOpenProfileFromIOhandlerTHR(cmsContext ContextID, cmsIOHANDLER* io) { _cmsICCPROFILE* NewIcc; cmsHPROFILE hEmpty = cmsCreateProfilePlaceholder(ContextID); if (hEmpty == NULL) return NULL; NewIcc = (_cmsICCPROFILE*) hEmpty; NewIcc ->IOhandler = io; if (!_cmsReadHeader(NewIcc)) goto Error; return hEmpty; Error: cmsCloseProfile(hEmpty); return NULL; } // Create profile from IOhandler cmsHPROFILE CMSEXPORT cmsOpenProfileFromIOhandler2THR(cmsContext ContextID, cmsIOHANDLER* io, cmsBool write) { _cmsICCPROFILE* NewIcc; cmsHPROFILE hEmpty = cmsCreateProfilePlaceholder(ContextID); if (hEmpty == NULL) return NULL; NewIcc = (_cmsICCPROFILE*) hEmpty; NewIcc ->IOhandler = io; if (write) { NewIcc -> IsWrite = TRUE; return hEmpty; } if (!_cmsReadHeader(NewIcc)) goto Error; return hEmpty; Error: cmsCloseProfile(hEmpty); return NULL; } // Create profile from disk file cmsHPROFILE CMSEXPORT cmsOpenProfileFromFileTHR(cmsContext ContextID, const char *lpFileName, const char *sAccess) { _cmsICCPROFILE* NewIcc; cmsHPROFILE hEmpty = cmsCreateProfilePlaceholder(ContextID); if (hEmpty == NULL) return NULL; NewIcc = (_cmsICCPROFILE*) hEmpty; NewIcc ->IOhandler = cmsOpenIOhandlerFromFile(ContextID, lpFileName, sAccess); if (NewIcc ->IOhandler == NULL) goto Error; if (*sAccess == 'W' || *sAccess == 'w') { NewIcc -> IsWrite = TRUE; return hEmpty; } if (!_cmsReadHeader(NewIcc)) goto Error; return hEmpty; Error: cmsCloseProfile(hEmpty); return NULL; } cmsHPROFILE CMSEXPORT cmsOpenProfileFromFile(const char *ICCProfile, const char *sAccess) { return cmsOpenProfileFromFileTHR(NULL, ICCProfile, sAccess); } cmsHPROFILE CMSEXPORT cmsOpenProfileFromStreamTHR(cmsContext ContextID, FILE* ICCProfile, const char *sAccess) { _cmsICCPROFILE* NewIcc; cmsHPROFILE hEmpty = cmsCreateProfilePlaceholder(ContextID); if (hEmpty == NULL) return NULL; NewIcc = (_cmsICCPROFILE*) hEmpty; NewIcc ->IOhandler = cmsOpenIOhandlerFromStream(ContextID, ICCProfile); if (NewIcc ->IOhandler == NULL) goto Error; if (*sAccess == 'w') { NewIcc -> IsWrite = TRUE; return hEmpty; } if (!_cmsReadHeader(NewIcc)) goto Error; return hEmpty; Error: cmsCloseProfile(hEmpty); return NULL; } cmsHPROFILE CMSEXPORT cmsOpenProfileFromStream(FILE* ICCProfile, const char *sAccess) { return cmsOpenProfileFromStreamTHR(NULL, ICCProfile, sAccess); } // Open from memory block cmsHPROFILE CMSEXPORT cmsOpenProfileFromMemTHR(cmsContext ContextID, const void* MemPtr, cmsUInt32Number dwSize) { _cmsICCPROFILE* NewIcc; cmsHPROFILE hEmpty; hEmpty = cmsCreateProfilePlaceholder(ContextID); if (hEmpty == NULL) return NULL; NewIcc = (_cmsICCPROFILE*) hEmpty; // Ok, in this case const void* is casted to void* just because open IO handler // shares read and writting modes. Don't abuse this feature! NewIcc ->IOhandler = cmsOpenIOhandlerFromMem(ContextID, (void*) MemPtr, dwSize, "r"); if (NewIcc ->IOhandler == NULL) goto Error; if (!_cmsReadHeader(NewIcc)) goto Error; return hEmpty; Error: cmsCloseProfile(hEmpty); return NULL; } cmsHPROFILE CMSEXPORT cmsOpenProfileFromMem(const void* MemPtr, cmsUInt32Number dwSize) { return cmsOpenProfileFromMemTHR(NULL, MemPtr, dwSize); } // Dump tag contents. If the profile is being modified, untouched tags are copied from FileOrig static cmsBool SaveTags(_cmsICCPROFILE* Icc, _cmsICCPROFILE* FileOrig) { cmsUInt8Number* Data; cmsUInt32Number i; cmsUInt32Number Begin; cmsIOHANDLER* io = Icc ->IOhandler; cmsTagDescriptor* TagDescriptor; cmsTagTypeSignature TypeBase; cmsTagTypeSignature Type; cmsTagTypeHandler* TypeHandler; cmsFloat64Number Version = cmsGetProfileVersion((cmsHPROFILE) Icc); cmsTagTypeHandler LocalTypeHandler; for (i=0; i < Icc -> TagCount; i++) { if (Icc ->TagNames[i] == (cmsTagSignature) 0) continue; // Linked tags are not written if (Icc ->TagLinked[i] != (cmsTagSignature) 0) continue; Icc -> TagOffsets[i] = Begin = io ->UsedSpace; Data = (cmsUInt8Number*) Icc -> TagPtrs[i]; if (!Data) { // Reach here if we are copying a tag from a disk-based ICC profile which has not been modified by user. // In this case a blind copy of the block data is performed if (FileOrig != NULL && Icc -> TagOffsets[i]) { cmsUInt32Number TagSize = FileOrig -> TagSizes[i]; cmsUInt32Number TagOffset = FileOrig -> TagOffsets[i]; void* Mem; if (!FileOrig ->IOhandler->Seek(FileOrig ->IOhandler, TagOffset)) return FALSE; Mem = _cmsMalloc(Icc ->ContextID, TagSize); if (Mem == NULL) return FALSE; if (FileOrig ->IOhandler->Read(FileOrig->IOhandler, Mem, TagSize, 1) != 1) return FALSE; if (!io ->Write(io, TagSize, Mem)) return FALSE; _cmsFree(Icc ->ContextID, Mem); Icc -> TagSizes[i] = (io ->UsedSpace - Begin); // Align to 32 bit boundary. if (! _cmsWriteAlignment(io)) return FALSE; } continue; } // Should this tag be saved as RAW? If so, tagsizes should be specified in advance (no further cooking is done) if (Icc ->TagSaveAsRaw[i]) { if (io -> Write(io, Icc ->TagSizes[i], Data) != 1) return FALSE; } else { // Search for support on this tag TagDescriptor = _cmsGetTagDescriptor(Icc-> ContextID, Icc -> TagNames[i]); if (TagDescriptor == NULL) continue; // Unsupported, ignore it if (TagDescriptor ->DecideType != NULL) { Type = TagDescriptor ->DecideType(Version, Data); } else { Type = TagDescriptor ->SupportedTypes[0]; } TypeHandler = _cmsGetTagTypeHandler(Icc->ContextID, Type); if (TypeHandler == NULL) { cmsSignalError(Icc ->ContextID, cmsERROR_INTERNAL, "(Internal) no handler for tag %x", Icc -> TagNames[i]); continue; } TypeBase = TypeHandler ->Signature; if (!_cmsWriteTypeBase(io, TypeBase)) return FALSE; LocalTypeHandler = *TypeHandler; LocalTypeHandler.ContextID = Icc ->ContextID; LocalTypeHandler.ICCVersion = Icc ->Version; if (!LocalTypeHandler.WritePtr(&LocalTypeHandler, io, Data, TagDescriptor ->ElemCount)) { char String[5]; _cmsTagSignature2String(String, (cmsTagSignature) TypeBase); cmsSignalError(Icc ->ContextID, cmsERROR_WRITE, "Couldn't write type '%s'", String); return FALSE; } } Icc -> TagSizes[i] = (io ->UsedSpace - Begin); // Align to 32 bit boundary. if (! _cmsWriteAlignment(io)) return FALSE; } return TRUE; } // Fill the offset and size fields for all linked tags static cmsBool SetLinks( _cmsICCPROFILE* Icc) { cmsUInt32Number i; for (i=0; i < Icc -> TagCount; i++) { cmsTagSignature lnk = Icc ->TagLinked[i]; if (lnk != (cmsTagSignature) 0) { int j = _cmsSearchTag(Icc, lnk, FALSE); if (j >= 0) { Icc ->TagOffsets[i] = Icc ->TagOffsets[j]; Icc ->TagSizes[i] = Icc ->TagSizes[j]; } } } return TRUE; } // Low-level save to IOHANDLER. It returns the number of bytes used to // store the profile, or zero on error. io may be NULL and in this case // no data is written--only sizes are calculated cmsUInt32Number CMSEXPORT cmsSaveProfileToIOhandler(cmsHPROFILE hProfile, cmsIOHANDLER* io) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; _cmsICCPROFILE Keep; cmsIOHANDLER* PrevIO = NULL; cmsUInt32Number UsedSpace; cmsContext ContextID; _cmsAssert(hProfile != NULL); if (!_cmsLockMutex(Icc->ContextID, Icc->UsrMutex)) return 0; memmove(&Keep, Icc, sizeof(_cmsICCPROFILE)); ContextID = cmsGetProfileContextID(hProfile); PrevIO = Icc ->IOhandler = cmsOpenIOhandlerFromNULL(ContextID); if (PrevIO == NULL) { _cmsUnlockMutex(Icc->ContextID, Icc->UsrMutex); return 0; } // Pass #1 does compute offsets if (!_cmsWriteHeader(Icc, 0)) goto Error; if (!SaveTags(Icc, &Keep)) goto Error; UsedSpace = PrevIO ->UsedSpace; // Pass #2 does save to iohandler if (io != NULL) { Icc ->IOhandler = io; if (!SetLinks(Icc)) goto Error; if (!_cmsWriteHeader(Icc, UsedSpace)) goto Error; if (!SaveTags(Icc, &Keep)) goto Error; } memmove(Icc, &Keep, sizeof(_cmsICCPROFILE)); if (!cmsCloseIOhandler(PrevIO)) UsedSpace = 0; // As a error marker _cmsUnlockMutex(Icc->ContextID, Icc->UsrMutex); return UsedSpace; Error: cmsCloseIOhandler(PrevIO); memmove(Icc, &Keep, sizeof(_cmsICCPROFILE)); _cmsUnlockMutex(Icc->ContextID, Icc->UsrMutex); return 0; } // Low-level save to disk. cmsBool CMSEXPORT cmsSaveProfileToFile(cmsHPROFILE hProfile, const char* FileName) { cmsContext ContextID = cmsGetProfileContextID(hProfile); cmsIOHANDLER* io = cmsOpenIOhandlerFromFile(ContextID, FileName, "w"); cmsBool rc; if (io == NULL) return FALSE; rc = (cmsSaveProfileToIOhandler(hProfile, io) != 0); rc &= cmsCloseIOhandler(io); if (rc == FALSE) { // remove() is C99 per 7.19.4.1 remove(FileName); // We have to IGNORE return value in this case } return rc; } // Same as anterior, but for streams cmsBool CMSEXPORT cmsSaveProfileToStream(cmsHPROFILE hProfile, FILE* Stream) { cmsBool rc; cmsContext ContextID = cmsGetProfileContextID(hProfile); cmsIOHANDLER* io = cmsOpenIOhandlerFromStream(ContextID, Stream); if (io == NULL) return FALSE; rc = (cmsSaveProfileToIOhandler(hProfile, io) != 0); rc &= cmsCloseIOhandler(io); return rc; } // Same as anterior, but for memory blocks. In this case, a NULL as MemPtr means calculate needed space only cmsBool CMSEXPORT cmsSaveProfileToMem(cmsHPROFILE hProfile, void *MemPtr, cmsUInt32Number* BytesNeeded) { cmsBool rc; cmsIOHANDLER* io; cmsContext ContextID = cmsGetProfileContextID(hProfile); _cmsAssert(BytesNeeded != NULL); // Should we just calculate the needed space? if (MemPtr == NULL) { *BytesNeeded = cmsSaveProfileToIOhandler(hProfile, NULL); return (*BytesNeeded == 0) ? FALSE : TRUE; } // That is a real write operation io = cmsOpenIOhandlerFromMem(ContextID, MemPtr, *BytesNeeded, "w"); if (io == NULL) return FALSE; rc = (cmsSaveProfileToIOhandler(hProfile, io) != 0); rc &= cmsCloseIOhandler(io); return rc; } // Closes a profile freeing any involved resources cmsBool CMSEXPORT cmsCloseProfile(cmsHPROFILE hProfile) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; cmsBool rc = TRUE; cmsUInt32Number i; if (!Icc) return FALSE; // Was open in write mode? if (Icc ->IsWrite) { Icc ->IsWrite = FALSE; // Assure no further writting rc &= cmsSaveProfileToFile(hProfile, Icc ->IOhandler->PhysicalFile); } for (i=0; i < Icc -> TagCount; i++) { if (Icc -> TagPtrs[i]) { cmsTagTypeHandler* TypeHandler = Icc ->TagTypeHandlers[i]; if (TypeHandler != NULL) { cmsTagTypeHandler LocalTypeHandler = *TypeHandler; LocalTypeHandler.ContextID = Icc ->ContextID; // As an additional parameters LocalTypeHandler.ICCVersion = Icc ->Version; LocalTypeHandler.FreePtr(&LocalTypeHandler, Icc -> TagPtrs[i]); } else _cmsFree(Icc ->ContextID, Icc ->TagPtrs[i]); } } if (Icc ->IOhandler != NULL) { rc &= cmsCloseIOhandler(Icc->IOhandler); } _cmsDestroyMutex(Icc->ContextID, Icc->UsrMutex); _cmsFree(Icc ->ContextID, Icc); // Free placeholder memory return rc; } // ------------------------------------------------------------------------------------------------------------------- // Returns TRUE if a given tag is supported by a plug-in static cmsBool IsTypeSupported(cmsTagDescriptor* TagDescriptor, cmsTagTypeSignature Type) { cmsUInt32Number i, nMaxTypes; nMaxTypes = TagDescriptor->nSupportedTypes; if (nMaxTypes >= MAX_TYPES_IN_LCMS_PLUGIN) nMaxTypes = MAX_TYPES_IN_LCMS_PLUGIN; for (i=0; i < nMaxTypes; i++) { if (Type == TagDescriptor ->SupportedTypes[i]) return TRUE; } return FALSE; } // That's the main read function void* CMSEXPORT cmsReadTag(cmsHPROFILE hProfile, cmsTagSignature sig) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; cmsIOHANDLER* io = Icc ->IOhandler; cmsTagTypeHandler* TypeHandler; cmsTagTypeHandler LocalTypeHandler; cmsTagDescriptor* TagDescriptor; cmsTagTypeSignature BaseType; cmsUInt32Number Offset, TagSize; cmsUInt32Number ElemCount; int n; if (!_cmsLockMutex(Icc->ContextID, Icc ->UsrMutex)) return NULL; n = _cmsSearchTag(Icc, sig, TRUE); if (n < 0) goto Error; // Not found, return NULL // If the element is already in memory, return the pointer if (Icc -> TagPtrs[n]) { if (Icc ->TagSaveAsRaw[n]) goto Error; // We don't support read raw tags as cooked _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return Icc -> TagPtrs[n]; } // We need to read it. Get the offset and size to the file Offset = Icc -> TagOffsets[n]; TagSize = Icc -> TagSizes[n]; // Seek to its location if (!io -> Seek(io, Offset)) goto Error; // Search for support on this tag TagDescriptor = _cmsGetTagDescriptor(Icc-> ContextID, sig); if (TagDescriptor == NULL) { char String[5]; _cmsTagSignature2String(String, sig); // An unknown element was found. cmsSignalError(Icc ->ContextID, cmsERROR_UNKNOWN_EXTENSION, "Unknown tag type '%s' found.", String); goto Error; // Unsupported. } // if supported, get type and check if in list BaseType = _cmsReadTypeBase(io); if (BaseType == 0) goto Error; if (!IsTypeSupported(TagDescriptor, BaseType)) goto Error; TagSize -= 8; // Alredy read by the type base logic // Get type handler TypeHandler = _cmsGetTagTypeHandler(Icc ->ContextID, BaseType); if (TypeHandler == NULL) goto Error; LocalTypeHandler = *TypeHandler; // Read the tag Icc -> TagTypeHandlers[n] = TypeHandler; LocalTypeHandler.ContextID = Icc ->ContextID; LocalTypeHandler.ICCVersion = Icc ->Version; Icc -> TagPtrs[n] = LocalTypeHandler.ReadPtr(&LocalTypeHandler, io, &ElemCount, TagSize); // The tag type is supported, but something wrong happened and we cannot read the tag. // let know the user about this (although it is just a warning) if (Icc -> TagPtrs[n] == NULL) { char String[5]; _cmsTagSignature2String(String, sig); cmsSignalError(Icc ->ContextID, cmsERROR_CORRUPTION_DETECTED, "Corrupted tag '%s'", String); goto Error; } // This is a weird error that may be a symptom of something more serious, the number of // stored item is actually less than the number of required elements. if (ElemCount < TagDescriptor ->ElemCount) { char String[5]; _cmsTagSignature2String(String, sig); cmsSignalError(Icc ->ContextID, cmsERROR_CORRUPTION_DETECTED, "'%s' Inconsistent number of items: expected %d, got %d", String, TagDescriptor ->ElemCount, ElemCount); } // Return the data _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return Icc -> TagPtrs[n]; // Return error and unlock tha data Error: _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return NULL; } // Get true type of data cmsTagTypeSignature _cmsGetTagTrueType(cmsHPROFILE hProfile, cmsTagSignature sig) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; cmsTagTypeHandler* TypeHandler; int n; // Search for given tag in ICC profile directory n = _cmsSearchTag(Icc, sig, TRUE); if (n < 0) return (cmsTagTypeSignature) 0; // Not found, return NULL // Get the handler. The true type is there TypeHandler = Icc -> TagTypeHandlers[n]; return TypeHandler ->Signature; } // Write a single tag. This just keeps track of the tak into a list of "to be written". If the tag is already // in that list, the previous version is deleted. cmsBool CMSEXPORT cmsWriteTag(cmsHPROFILE hProfile, cmsTagSignature sig, const void* data) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; cmsTagTypeHandler* TypeHandler = NULL; cmsTagTypeHandler LocalTypeHandler; cmsTagDescriptor* TagDescriptor = NULL; cmsTagTypeSignature Type; int i; cmsFloat64Number Version; char TypeString[5], SigString[5]; if (!_cmsLockMutex(Icc->ContextID, Icc ->UsrMutex)) return FALSE; // To delete tags. if (data == NULL) { // Delete the tag i = _cmsSearchTag(Icc, sig, FALSE); if (i >= 0) { // Use zero as a mark of deleted _cmsDeleteTagByPos(Icc, i); Icc ->TagNames[i] = (cmsTagSignature) 0; _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return TRUE; } // Didn't find the tag goto Error; } if (!_cmsNewTag(Icc, sig, &i)) goto Error; // This is not raw Icc ->TagSaveAsRaw[i] = FALSE; // This is not a link Icc ->TagLinked[i] = (cmsTagSignature) 0; // Get information about the TAG. TagDescriptor = _cmsGetTagDescriptor(Icc-> ContextID, sig); if (TagDescriptor == NULL){ cmsSignalError(Icc ->ContextID, cmsERROR_UNKNOWN_EXTENSION, "Unsupported tag '%x'", sig); goto Error; } // Now we need to know which type to use. It depends on the version. Version = cmsGetProfileVersion(hProfile); if (TagDescriptor ->DecideType != NULL) { // Let the tag descriptor to decide the type base on depending on // the data. This is useful for example on parametric curves, where // curves specified by a table cannot be saved as parametric and needs // to be casted to single v2-curves, even on v4 profiles. Type = TagDescriptor ->DecideType(Version, data); } else { Type = TagDescriptor ->SupportedTypes[0]; } // Does the tag support this type? if (!IsTypeSupported(TagDescriptor, Type)) { _cmsTagSignature2String(TypeString, (cmsTagSignature) Type); _cmsTagSignature2String(SigString, sig); cmsSignalError(Icc ->ContextID, cmsERROR_UNKNOWN_EXTENSION, "Unsupported type '%s' for tag '%s'", TypeString, SigString); goto Error; } // Does we have a handler for this type? TypeHandler = _cmsGetTagTypeHandler(Icc->ContextID, Type); if (TypeHandler == NULL) { _cmsTagSignature2String(TypeString, (cmsTagSignature) Type); _cmsTagSignature2String(SigString, sig); cmsSignalError(Icc ->ContextID, cmsERROR_UNKNOWN_EXTENSION, "Unsupported type '%s' for tag '%s'", TypeString, SigString); goto Error; // Should never happen } // Fill fields on icc structure Icc ->TagTypeHandlers[i] = TypeHandler; Icc ->TagNames[i] = sig; Icc ->TagSizes[i] = 0; Icc ->TagOffsets[i] = 0; LocalTypeHandler = *TypeHandler; LocalTypeHandler.ContextID = Icc ->ContextID; LocalTypeHandler.ICCVersion = Icc ->Version; Icc ->TagPtrs[i] = LocalTypeHandler.DupPtr(&LocalTypeHandler, data, TagDescriptor ->ElemCount); if (Icc ->TagPtrs[i] == NULL) { _cmsTagSignature2String(TypeString, (cmsTagSignature) Type); _cmsTagSignature2String(SigString, sig); cmsSignalError(Icc ->ContextID, cmsERROR_CORRUPTION_DETECTED, "Malformed struct in type '%s' for tag '%s'", TypeString, SigString); goto Error; } _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return TRUE; Error: _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return FALSE; } // Read and write raw data. The only way those function would work and keep consistence with normal read and write // is to do an additional step of serialization. That means, readRaw would issue a normal read and then convert the obtained // data to raw bytes by using the "write" serialization logic. And vice-versa. I know this may end in situations where // raw data written does not exactly correspond with the raw data proposed to cmsWriteRaw data, but this approach allows // to write a tag as raw data and the read it as handled. cmsInt32Number CMSEXPORT cmsReadRawTag(cmsHPROFILE hProfile, cmsTagSignature sig, void* data, cmsUInt32Number BufferSize) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; void *Object; int i; cmsIOHANDLER* MemIO; cmsTagTypeHandler* TypeHandler = NULL; cmsTagTypeHandler LocalTypeHandler; cmsTagDescriptor* TagDescriptor = NULL; cmsUInt32Number rc; cmsUInt32Number Offset, TagSize; if (!_cmsLockMutex(Icc->ContextID, Icc ->UsrMutex)) return 0; // Search for given tag in ICC profile directory i = _cmsSearchTag(Icc, sig, TRUE); if (i < 0) goto Error; // Not found, // It is already read? if (Icc -> TagPtrs[i] == NULL) { // No yet, get original position Offset = Icc ->TagOffsets[i]; TagSize = Icc ->TagSizes[i]; // read the data directly, don't keep copy if (data != NULL) { if (BufferSize < TagSize) TagSize = BufferSize; if (!Icc ->IOhandler ->Seek(Icc ->IOhandler, Offset)) goto Error; if (!Icc ->IOhandler ->Read(Icc ->IOhandler, data, 1, TagSize)) goto Error; _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return TagSize; } _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return Icc ->TagSizes[i]; } // The data has been already read, or written. But wait!, maybe the user choosed to save as // raw data. In this case, return the raw data directly if (Icc ->TagSaveAsRaw[i]) { if (data != NULL) { TagSize = Icc ->TagSizes[i]; if (BufferSize < TagSize) TagSize = BufferSize; memmove(data, Icc ->TagPtrs[i], TagSize); _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return TagSize; } _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return Icc ->TagSizes[i]; } // Already readed, or previously set by cmsWriteTag(). We need to serialize that // data to raw in order to maintain consistency. _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); Object = cmsReadTag(hProfile, sig); if (!_cmsLockMutex(Icc->ContextID, Icc ->UsrMutex)) return 0; if (Object == NULL) goto Error; // Now we need to serialize to a memory block: just use a memory iohandler if (data == NULL) { MemIO = cmsOpenIOhandlerFromNULL(cmsGetProfileContextID(hProfile)); } else{ MemIO = cmsOpenIOhandlerFromMem(cmsGetProfileContextID(hProfile), data, BufferSize, "w"); } if (MemIO == NULL) goto Error; // Obtain type handling for the tag TypeHandler = Icc ->TagTypeHandlers[i]; TagDescriptor = _cmsGetTagDescriptor(Icc-> ContextID, sig); if (TagDescriptor == NULL) { cmsCloseIOhandler(MemIO); goto Error; } if (TypeHandler == NULL) goto Error; // Serialize LocalTypeHandler = *TypeHandler; LocalTypeHandler.ContextID = Icc ->ContextID; LocalTypeHandler.ICCVersion = Icc ->Version; if (!_cmsWriteTypeBase(MemIO, TypeHandler ->Signature)) { cmsCloseIOhandler(MemIO); goto Error; } if (!LocalTypeHandler.WritePtr(&LocalTypeHandler, MemIO, Object, TagDescriptor ->ElemCount)) { cmsCloseIOhandler(MemIO); goto Error; } // Get Size and close rc = MemIO ->Tell(MemIO); cmsCloseIOhandler(MemIO); // Ignore return code this time _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return rc; Error: _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return 0; } // Similar to the anterior. This function allows to write directly to the ICC profile any data, without // checking anything. As a rule, mixing Raw with cooked doesn't work, so writting a tag as raw and then reading // it as cooked without serializing does result into an error. If that is what you want, you will need to dump // the profile to memry or disk and then reopen it. cmsBool CMSEXPORT cmsWriteRawTag(cmsHPROFILE hProfile, cmsTagSignature sig, const void* data, cmsUInt32Number Size) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; int i; if (!_cmsLockMutex(Icc->ContextID, Icc ->UsrMutex)) return 0; if (!_cmsNewTag(Icc, sig, &i)) { _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return FALSE; } // Mark the tag as being written as RAW Icc ->TagSaveAsRaw[i] = TRUE; Icc ->TagNames[i] = sig; Icc ->TagLinked[i] = (cmsTagSignature) 0; // Keep a copy of the block Icc ->TagPtrs[i] = _cmsDupMem(Icc ->ContextID, data, Size); Icc ->TagSizes[i] = Size; _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); if (Icc->TagPtrs[i] == NULL) { Icc->TagNames[i] = (cmsTagSignature) 0; return FALSE; } return TRUE; } // Using this function you can collapse several tag entries to the same block in the profile cmsBool CMSEXPORT cmsLinkTag(cmsHPROFILE hProfile, cmsTagSignature sig, cmsTagSignature dest) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; int i; if (!_cmsLockMutex(Icc->ContextID, Icc ->UsrMutex)) return FALSE; if (!_cmsNewTag(Icc, sig, &i)) { _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return FALSE; } // Keep necessary information Icc ->TagSaveAsRaw[i] = FALSE; Icc ->TagNames[i] = sig; Icc ->TagLinked[i] = dest; Icc ->TagPtrs[i] = NULL; Icc ->TagSizes[i] = 0; Icc ->TagOffsets[i] = 0; _cmsUnlockMutex(Icc->ContextID, Icc ->UsrMutex); return TRUE; } // Returns the tag linked to sig, in the case two tags are sharing same resource cmsTagSignature CMSEXPORT cmsTagLinkedTo(cmsHPROFILE hProfile, cmsTagSignature sig) { _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; int i; // Search for given tag in ICC profile directory i = _cmsSearchTag(Icc, sig, FALSE); if (i < 0) return (cmsTagSignature) 0; // Not found, return 0 return Icc -> TagLinked[i]; }