X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2FgdcmPixelConvert.cxx;h=dccf178e9ae5cb32fcce25680d1fb8a88e761873;hb=5e64f1feb4d82a4da9893dca043212ac90807fe4;hp=b9e5e3ab0f97554944e5dc0398c78a1e1345cafc;hpb=c132b43ebda61490fe85f62a88969b6cfb9e400d;p=gdcm.git diff --git a/src/gdcmPixelConvert.cxx b/src/gdcmPixelConvert.cxx index b9e5e3ab..dccf178e 100644 --- a/src/gdcmPixelConvert.cxx +++ b/src/gdcmPixelConvert.cxx @@ -3,8 +3,8 @@ Program: gdcm Module: $RCSfile: gdcmPixelConvert.cxx,v $ Language: C++ - Date: $Date: 2004/10/15 10:43:28 $ - Version: $Revision: 1.14 $ + Date: $Date: 2004/11/04 18:14:34 $ + Version: $Revision: 1.23 $ Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de l'Image). All rights reserved. See Doc/License.txt or @@ -24,25 +24,25 @@ #include "gdcmDebug.h" #include "gdcmPixelConvert.h" +#include namespace gdcm { - #define str2num(str, typeNum) *((typeNum *)(str)) // For JPEG 2000, body in file gdcmJpeg2000.cxx -bool gdcm_read_JPEG2000_file (FILE* fp, void* image_buffer); +bool gdcm_read_JPEG2000_file (std::ifstream* fp, void* image_buffer); // For JPEG 8 Bits, body in file gdcmJpeg8.cxx -bool gdcm_read_JPEG_file8 (FILE* fp, void* image_buffer); +bool gdcm_read_JPEG_file8 (std::ifstream* fp, void* image_buffer); // For JPEG 12 Bits, body in file gdcmJpeg12.cxx -bool gdcm_read_JPEG_file12 (FILE* fp, void* image_buffer); +bool gdcm_read_JPEG_file12 (std::ifstream* fp, void* image_buffer); // For JPEG 16 Bits, body in file gdcmJpeg16.cxx // Beware this is misleading there is no 16bits DCT algorithm, only // jpeg lossless compression exist in 16bits. -bool gdcm_read_JPEG_file16 (FILE* fp, void* image_buffer); +bool gdcm_read_JPEG_file16 (std::ifstream* fp, void* image_buffer); //----------------------------------------------------------------------------- @@ -53,16 +53,26 @@ PixelConvert::PixelConvert() RGBSize = 0; Decompressed = 0; DecompressedSize = 0; + LutRGBA = 0; + LutRedData = 0; + LutGreenData = 0; + LutBlueData =0; } void PixelConvert::Squeeze() { - if ( RGB ) { + if ( RGB ) + { delete [] RGB; } - if ( Decompressed ) { + if ( Decompressed ) + { delete [] Decompressed; } + if ( LutRGBA ) + { + delete [] LutRGBA; + } } PixelConvert::~PixelConvert() @@ -75,7 +85,7 @@ void PixelConvert::AllocateRGB() if ( RGB ) { delete [] RGB; } - RGB = new uint8_t[RGBSize]; + RGB = new uint8_t[ RGBSize ]; } void PixelConvert::AllocateDecompressed() @@ -87,41 +97,40 @@ void PixelConvert::AllocateDecompressed() } /** - * \brief Read from file a 12 bits per pixel image and uncompress it + * \brief Read from file a 12 bits per pixel image and decompress it * into a 16 bits per pixel image. */ -void PixelConvert::ReadAndDecompress12BitsTo16Bits( FILE* fp ) +void PixelConvert::ReadAndDecompress12BitsTo16Bits( std::ifstream* fp ) throw ( FormatError ) { int nbPixels = XSize * YSize; uint16_t* localDecompres = (uint16_t*)Decompressed; - + for( int p = 0; p < nbPixels; p += 2 ) { uint8_t b0, b1, b2; - size_t ItemRead; - - ItemRead = fread( &b0, 1, 1, fp ); - if ( ItemRead != 1 ) + + fp->read( (char*)&b0, 1); + if ( fp->fail() || fp->eof() )//Fp->gcount() == 1 { throw FormatError( "PixelConvert::ReadAndDecompress12BitsTo16Bits()", "Unfound first block" ); } - - ItemRead = fread( &b1, 1, 1, fp ); - if ( ItemRead != 1 ) + + fp->read( (char*)&b1, 1 ); + if ( fp->fail() || fp->eof())//Fp->gcount() == 1 { throw FormatError( "PixelConvert::ReadAndDecompress12BitsTo16Bits()", "Unfound second block" ); } - - ItemRead = fread( &b2, 1, 1, fp ); - if ( ItemRead != 1 ) + + fp->read( (char*)&b2, 1 ); + if ( fp->fail() || fp->eof())//Fp->gcount() == 1 { throw FormatError( "PixelConvert::ReadAndDecompress12BitsTo16Bits()", "Unfound second block" ); } - + // Two steps are necessary to please VC++ // // 2 pixels 12bit = [0xABCDEF] @@ -130,7 +139,7 @@ void PixelConvert::ReadAndDecompress12BitsTo16Bits( FILE* fp ) *localDecompres++ = ((b0 >> 4) << 8) + ((b0 & 0x0f) << 4) + (b1 & 0x0f); // F C E *localDecompres++ = ((b2 & 0x0f) << 8) + ((b1 >> 4) << 4) + (b2 >> 4); - + /// \todo JPR Troubles expected on Big-Endian processors ? } } @@ -146,15 +155,15 @@ void PixelConvert::ReadAndDecompress12BitsTo16Bits( FILE* fp ) bool PixelConvert::DecompressRLE16BitsFromRLE8Bits( int NumberOfFrames ) { size_t PixelNumber = XSize * YSize; - size_t uncompressedSize = XSize * YSize * NumberOfFrames; + size_t decompressedSize = XSize * YSize * NumberOfFrames; // We assumed Decompressed contains the decoded RLE pixels but as // 8 bits per pixel. In order to convert those pixels to 16 bits // per pixel we cannot work in place within Decompressed and hence // we copy it in a safe place, say copyDecompressed. - uint8_t* copyDecompressed = new uint8_t[ uncompressedSize * 2 ]; - memmove( copyDecompressed, Decompressed, uncompressedSize * 2 ); + uint8_t* copyDecompressed = new uint8_t[ decompressedSize * 2 ]; + memmove( copyDecompressed, Decompressed, decompressedSize * 2 ); uint8_t* x = Decompressed; uint8_t* a = copyDecompressed; @@ -176,28 +185,28 @@ bool PixelConvert::DecompressRLE16BitsFromRLE8Bits( int NumberOfFrames ) } /** - * \brief Implementation of the RLE decoding algorithm for uncompressing + * \brief Implementation of the RLE decoding algorithm for decompressing * a RLE fragment. [refer to PS 3.5-2003, section G.3.2 p 86] * @param subDecompressed Sub region of \ref Decompressed where the de * decoded fragment should be placed. * @param fragmentSize The length of the binary fragment as found on the disk. - * @param uncompressedSegmentSize The expected length of the fragment ONCE + * @param decompressedSegmentSize The expected length of the fragment ONCE * decompressed. * @param fp File Pointer: on entry the position should be the one of * the fragment to be decoded. */ bool PixelConvert::ReadAndDecompressRLEFragment( uint8_t* subDecompressed, long fragmentSize, - long uncompressedSegmentSize, - FILE* fp ) + long decompressedSegmentSize, + std::ifstream* fp ) { int8_t count; long numberOfOutputBytes = 0; long numberOfReadBytes = 0; - - while( numberOfOutputBytes < uncompressedSegmentSize ) + + while( numberOfOutputBytes < decompressedSegmentSize ) { - fread( &count, 1, 1, fp ); + fp->read( (char*)&count, 1 ); numberOfReadBytes += 1; if ( count >= 0 ) // Note: count <= 127 comparison is always true due to limited range @@ -205,7 +214,7 @@ bool PixelConvert::ReadAndDecompressRLEFragment( uint8_t* subDecompressed, // signed integer of width N is 2^(N-1) - 1, which for int8_t // is 127]. { - fread( subDecompressed, count + 1, 1, fp); + fp->read( (char*)subDecompressed, count + 1); numberOfReadBytes += count + 1; subDecompressed += count + 1; numberOfOutputBytes += count + 1; @@ -215,7 +224,7 @@ bool PixelConvert::ReadAndDecompressRLEFragment( uint8_t* subDecompressed, if ( ( count <= -1 ) && ( count >= -127 ) ) { int8_t newByte; - fread( &newByte, 1, 1, fp); + fp->read( (char*)&newByte, 1); numberOfReadBytes += 1; for( int i = 0; i < -count + 1; i++ ) { @@ -239,12 +248,12 @@ bool PixelConvert::ReadAndDecompressRLEFragment( uint8_t* subDecompressed, /** * \brief Reads from disk the Pixel Data of 'Run Length Encoded' - * Dicom encapsulated file and uncompress it. + * Dicom encapsulated file and decompress it. * @param fp already open File Pointer * at which the pixel data should be copied * @return Boolean */ -bool PixelConvert::ReadAndDecompressRLEFile( FILE* fp ) +bool PixelConvert::ReadAndDecompressRLEFile( std::ifstream* fp ) { uint8_t* subDecompressed = Decompressed; long decompressedSegmentSize = XSize * YSize; @@ -256,9 +265,9 @@ bool PixelConvert::ReadAndDecompressRLEFile( FILE* fp ) ++it ) { // Loop on the fragments - for( int k = 1; k <= (*it)->NumberFragments; k++ ) + for( unsigned int k = 1; k <= (*it)->NumberFragments; k++ ) { - fseek( fp, (*it)->Offset[k] ,SEEK_SET ); + fp->seekg( (*it)->Offset[k] , std::ios_base::beg ); (void)ReadAndDecompressRLEFragment( subDecompressed, (*it)->Length[k], decompressedSegmentSize, @@ -266,13 +275,13 @@ bool PixelConvert::ReadAndDecompressRLEFile( FILE* fp ) subDecompressed += decompressedSegmentSize; } } - + if ( BitsAllocated == 16 ) { // Try to deal with RLE 16 Bits (void)DecompressRLE16BitsFromRLE8Bits( ZSize ); } - + return true; } @@ -282,7 +291,7 @@ bool PixelConvert::ReadAndDecompressRLEFile( FILE* fp ) void PixelConvert::ConvertSwapZone() { unsigned int i; - + if( BitsAllocated == 16 ) { uint16_t* im16 = (uint16_t*)Decompressed; @@ -385,11 +394,11 @@ void PixelConvert::ConvertReorderEndianity() /** * \brief Reads from disk the Pixel Data of JPEG Dicom encapsulated - & file and uncompress it. + & file and decompress it. * @param fp File Pointer * @return Boolean */ -bool PixelConvert::ReadAndDecompressJPEGFile( FILE* fp ) +bool PixelConvert::ReadAndDecompressJPEGFile( std::ifstream* fp ) { uint8_t* localDecompressed = Decompressed; // Loop on the fragment[s] @@ -398,7 +407,7 @@ bool PixelConvert::ReadAndDecompressJPEGFile( FILE* fp ) it != JPEGInfo->Fragments.end(); ++it ) { - fseek( fp, (*it)->Offset, SEEK_SET ); + fp->seekg( (*it)->Offset, std::ios_base::beg); if ( IsJPEG2000 ) { @@ -439,12 +448,12 @@ bool PixelConvert::ReadAndDecompressJPEGFile( FILE* fp ) "jpeg lossy compression "); return false; } - + // Advance to next free location in Decompressed // for next fragment decompression (if any) int length = XSize * YSize * SamplesPerPixel; int numberBytes = BitsAllocated / 8; - + localDecompressed += length * numberBytes; } return true; @@ -500,7 +509,7 @@ void PixelConvert::ConvertYcBcRPlanesToRGBPixels() uint8_t* localDecompressed = Decompressed; uint8_t* copyDecompressed = new uint8_t[ DecompressedSize ]; memmove( copyDecompressed, localDecompressed, DecompressedSize ); - + // to see the tricks about YBR_FULL, YBR_FULL_422, // YBR_PARTIAL_422, YBR_ICT, YBR_RCT have a look at : // ftp://medical.nema.org/medical/dicom/final/sup61_ft.pdf @@ -508,17 +517,17 @@ void PixelConvert::ConvertYcBcRPlanesToRGBPixels() // int l = XSize * YSize; int nbFrames = ZSize; - + uint8_t* a = copyDecompressed; uint8_t* b = copyDecompressed + l; uint8_t* c = copyDecompressed + l + l; double R, G, B; - + /// \todo : Replace by the 'well known' integer computation /// counterpart. Refer to /// http://lestourtereaux.free.fr/papers/data/yuvrgb.pdf /// for code optimisation. - + for ( int i = 0; i < nbFrames; i++ ) { for ( int j = 0; j < l; j++ ) @@ -526,14 +535,14 @@ void PixelConvert::ConvertYcBcRPlanesToRGBPixels() R = 1.164 *(*a-16) + 1.596 *(*c -128) + 0.5; G = 1.164 *(*a-16) - 0.813 *(*c -128) - 0.392 *(*b -128) + 0.5; B = 1.164 *(*a-16) + 2.017 *(*b -128) + 0.5; - + if (R < 0.0) R = 0.0; if (G < 0.0) G = 0.0; if (B < 0.0) B = 0.0; if (R > 255.0) R = 255.0; if (G > 255.0) G = 255.0; if (B > 255.0) B = 255.0; - + *(localDecompressed++) = (uint8_t)R; *(localDecompressed++) = (uint8_t)G; *(localDecompressed++) = (uint8_t)B; @@ -554,13 +563,13 @@ void PixelConvert::ConvertRGBPlanesToRGBPixels() uint8_t* localDecompressed = Decompressed; uint8_t* copyDecompressed = new uint8_t[ DecompressedSize ]; memmove( copyDecompressed, localDecompressed, DecompressedSize ); - + int l = XSize * YSize * ZSize; - + uint8_t* a = copyDecompressed; uint8_t* b = copyDecompressed + l; uint8_t* c = copyDecompressed + l + l; - + for (int j = 0; j < l; j++) { *(localDecompressed++) = *(a++); @@ -570,11 +579,9 @@ void PixelConvert::ConvertRGBPlanesToRGBPixels() delete[] copyDecompressed; } -bool PixelConvert::ReadAndDecompressPixelData( FILE* fp ) +bool PixelConvert::ReadAndDecompressPixelData( std::ifstream* fp ) { - ComputeDecompressedImageDataSize(); - if ( HasLUT ) - DecompressedSize *= 3; + ComputeDecompressedAndRGBSizes(); AllocateDecompressed(); ////////////////////////////////////////////////// //// First stage: get our hands on the Pixel Data. @@ -584,27 +591,28 @@ bool PixelConvert::ReadAndDecompressPixelData( FILE* fp ) "unavailable file pointer." ); return false; } - - if ( fseek( fp, PixelOffset, SEEK_SET ) == -1 ) + + fp->seekg( PixelOffset, std::ios_base::beg ); + if( fp->fail() || fp->eof()) //Fp->gcount() == 1 { dbg.Verbose( 0, "PixelConvert::ReadAndDecompressPixelData: " "unable to find PixelOffset in file." ); return false; } - + ////////////////////////////////////////////////// - //// Second stage: read from disk dans uncompress. + //// Second stage: read from disk dans decompress. if ( BitsAllocated == 12 ) { ReadAndDecompress12BitsTo16Bits( fp); } - else if ( IsUncompressed ) + else if ( IsDecompressed ) { - size_t ItemRead = fread( Decompressed, PixelDataLength, 1, fp ); - if ( ItemRead != 1 ) + fp->read( (char*)Decompressed, PixelDataLength); + if ( fp->fail() || fp->eof())//Fp->gcount() == 1 { dbg.Verbose( 0, "PixelConvert::ReadAndDecompressPixelData: " - "reading of uncompressed pixel data failed." ); + "reading of decompressed pixel data failed." ); return false; } } @@ -695,19 +703,26 @@ void PixelConvert::ConvertHandleColor() // [Planar 1] AND [Photo C] ConvertRGBPlanesToRGBPixels(); } + return; } - // When planarConf is 0, pixels are allready in RGB + // When planarConf is 0, and RLELossless (forbidden by Dicom norm) + // pixels need to be RGB-fied anyway + if (IsRLELossless) + { + ConvertRGBPlanesToRGBPixels(); + } + // In *normal *case, when planarConf is 0, pixels are already in RGB } /** * \brief Predicate to know wether the image[s] (once decompressed) is RGB. - * \note See comments of \ref HandleColor + * \note See comments of \ref ConvertHandleColor */ bool PixelConvert::IsDecompressedRGB() { if ( IsMonochrome - || ( PlanarConfiguration == 2 ) + || PlanarConfiguration == 2 || IsPaletteColor ) { return false; @@ -715,7 +730,7 @@ bool PixelConvert::IsDecompressedRGB() return true; } -void PixelConvert::ComputeDecompressedImageDataSize() +void PixelConvert::ComputeDecompressedAndRGBSizes() { int bitsAllocated = BitsAllocated; // Number of "Bits Allocated" is fixed to 16 when it's 12, since @@ -726,9 +741,366 @@ void PixelConvert::ComputeDecompressedImageDataSize() bitsAllocated = 16; } - DecompressedSize = XSize * YSize * ZSize - * ( bitsAllocated / 8 ) - * SamplesPerPixel; + DecompressedSize = XSize * YSize * ZSize + * ( bitsAllocated / 8 ) + * SamplesPerPixel; + if ( HasLUT ) + { + RGBSize = 3 * DecompressedSize; + } + +} + +void PixelConvert::GrabInformationsFromHeader( Header* header ) +{ + // Just in case some access to a Header element requires disk access. + // Note: gdcmDocument::Fp is leaved open after OpenFile. + std::ifstream* fp = header->OpenFile(); + // Number of Bits Allocated for storing a Pixel is defaulted to 16 + // when absent from the header. + BitsAllocated = header->GetBitsAllocated(); + if ( BitsAllocated == 0 ) + { + BitsAllocated = 16; + } + + // Number of "Bits Stored" defaulted to number of "Bits Allocated" + // when absent from the header. + BitsStored = header->GetBitsStored(); + if ( BitsStored == 0 ) + { + BitsStored = BitsAllocated; + } + + // High Bit Position + HighBitPosition = header->GetHighBitPosition(); + if ( HighBitPosition == 0 ) + { + HighBitPosition = BitsAllocated - 1; + } + + XSize = header->GetXSize(); + YSize = header->GetYSize(); + ZSize = header->GetZSize(); + SamplesPerPixel = header->GetSamplesPerPixel(); + PixelSize = header->GetPixelSize(); + PixelSign = header->IsSignedPixelData(); + SwapCode = header->GetSwapCode(); + TransferSyntaxType ts = header->GetTransferSyntax(); + IsDecompressed = + ( ! header->IsDicomV3() ) + || ts == ImplicitVRLittleEndian + || ts == ExplicitVRLittleEndian + || ts == ExplicitVRBigEndian + || ts == DeflatedExplicitVRLittleEndian; + IsJPEG2000 = header->IsJPEG2000(); + IsJPEGLossless = header->IsJPEGLossless(); + IsRLELossless = ( ts == RLELossless ); + PixelOffset = header->GetPixelOffset(); + PixelDataLength = header->GetPixelAreaLength(); + RLEInfo = header->GetRLEInfo(); + JPEGInfo = header->GetJPEGInfo(); + + PlanarConfiguration = header->GetPlanarConfiguration(); + IsMonochrome = header->IsMonochrome(); + IsPaletteColor = header->IsPaletteColor(); + IsYBRFull = header->IsYBRFull(); + + ///////////////////////////////////////////////////////////////// + // LUT section: + HasLUT = header->HasLUT(); + if ( HasLUT ) + { + LutRedDescriptor = header->GetEntryByNumber( 0x0028, 0x1101 ); + LutGreenDescriptor = header->GetEntryByNumber( 0x0028, 0x1102 ); + LutBlueDescriptor = header->GetEntryByNumber( 0x0028, 0x1103 ); + + // Depending on the value of Document::MAX_SIZE_LOAD_ELEMENT_VALUE + // [ refer to invocation of Document::SetMaxSizeLoadEntry() in + // Document::Document() ], the loading of the value (content) of a + // [Bin|Val]Entry occurence migth have been hindered (read simply NOT + // loaded). Hence, we first try to obtain the LUTs data from the header + // and when this fails we read the LUTs data directely from disk. + /// \todo Reading a [Bin|Val]Entry directly from disk is a kludge. + /// We should NOT bypass the [Bin|Val]Entry class. Instead + /// an access to an UNLOADED content of a [Bin|Val]Entry occurence + /// (e.g. BinEntry::GetBinArea()) should force disk access from + /// within the [Bin|Val]Entry class itself. The only problem + /// is that the [Bin|Val]Entry is unaware of the FILE* is was + /// parsed from. Fix that. FIXME. + + ////// Red round: + LutRedData = (uint8_t*)header->GetEntryBinAreaByNumber( 0x0028, 0x1201 ); + if ( ! LutRedData ) + { + // Read the Lut Data from disk + DocEntry* lutRedDataEntry = header->GetDocEntryByNumber( 0x0028, + 0x1201 ); + LutRedData = new uint8_t[ lutRedDataEntry->GetLength() ]; + fp->seekg( lutRedDataEntry->GetOffset() ,std::ios_base::beg ); + fp->read( (char*)LutRedData, (size_t)lutRedDataEntry->GetLength()); + if ( fp->fail() || fp->eof())//Fp->gcount() == 1 + { + dbg.Verbose(0, "PixelConvert::GrabInformationsFromHeader: " + "unable to read red LUT data" ); + return; + } + } + + ////// Green round: + LutGreenData = (uint8_t*)header->GetEntryBinAreaByNumber(0x0028, 0x1202 ); + if ( ! LutGreenData) + { + // Read the Lut Data from disk + DocEntry* lutGreenDataEntry = header->GetDocEntryByNumber( 0x0028, + 0x1202 ); + LutGreenData = new uint8_t[ lutGreenDataEntry->GetLength() ]; + fp->seekg( lutGreenDataEntry->GetOffset() , std::ios_base::beg ); + fp->read( (char*)LutGreenData, (size_t)lutGreenDataEntry->GetLength() ); + if ( fp->fail() || fp->eof())//Fp->gcount() == 1 + { + dbg.Verbose(0, "PixelConvert::GrabInformationsFromHeader: " + "unable to read green LUT data" ); + return; + } + } + + ////// Blue round: + LutBlueData = (uint8_t*)header->GetEntryBinAreaByNumber( 0x0028, 0x1203 ); + if ( ! LutBlueData ) + { + // Read the Lut Data from disk + DocEntry* lutBlueDataEntry = header->GetDocEntryByNumber( 0x0028, + 0x1203 ); + LutBlueData = new uint8_t[ lutBlueDataEntry->GetLength() ]; + fp->seekg( lutBlueDataEntry->GetOffset() , std::ios_base::beg ); + fp->read( (char*)LutBlueData, (size_t)lutBlueDataEntry->GetLength() ); + if ( fp->fail() || fp->eof())//Fp->gcount() == 1 + { + dbg.Verbose(0, "PixelConvert::GrabInformationsFromHeader: " + "unable to read blue LUT data" ); + return; + } + } + } + + header->CloseFile(); +} + +/** + * \brief Build Red/Green/Blue/Alpha LUT from Header + * when (0028,0004),Photometric Interpretation = [PALETTE COLOR ] + * and (0028,1101),(0028,1102),(0028,1102) + * - xxx Palette Color Lookup Table Descriptor - are found + * and (0028,1201),(0028,1202),(0028,1202) + * - xxx Palette Color Lookup Table Data - are found + * \warning does NOT deal with : + * 0028 1100 Gray Lookup Table Descriptor (Retired) + * 0028 1221 Segmented Red Palette Color Lookup Table Data + * 0028 1222 Segmented Green Palette Color Lookup Table Data + * 0028 1223 Segmented Blue Palette Color Lookup Table Data + * no known Dicom reader deals with them :-( + * @return a RGBA Lookup Table + */ +void PixelConvert::BuildLUTRGBA() +{ + if ( LutRGBA ) + { + return; + } + // Not so easy : see + // http://www.barre.nom.fr/medical/dicom2/limitations.html#Color%20Lookup%20Tables + + if ( ! IsPaletteColor ) + { + return; + } + + if ( LutRedDescriptor == GDCM_UNFOUND + || LutGreenDescriptor == GDCM_UNFOUND + || LutBlueDescriptor == GDCM_UNFOUND ) + { + return; + } + + //////////////////////////////////////////// + // Extract the info from the LUT descriptors + int lengthR; // Red LUT length in Bytes + int debR; // Subscript of the first Lut Value + int nbitsR; // Lut item size (in Bits) + int nbRead = sscanf( LutRedDescriptor.c_str(), + "%d\\%d\\%d", + &lengthR, &debR, &nbitsR ); + if( nbRead != 3 ) + { + dbg.Verbose(0, "PixelConvert::BuildLUTRGBA: wrong red LUT descriptor"); + } + + int lengthG; // Green LUT length in Bytes + int debG; // Subscript of the first Lut Value + int nbitsG; // Lut item size (in Bits) + nbRead = sscanf( LutGreenDescriptor.c_str(), + "%d\\%d\\%d", + &lengthG, &debG, &nbitsG ); + if( nbRead != 3 ) + { + dbg.Verbose(0, "PixelConvert::BuildLUTRGBA: wrong green LUT descriptor"); + } + + int lengthB; // Blue LUT length in Bytes + int debB; // Subscript of the first Lut Value + int nbitsB; // Lut item size (in Bits) + nbRead = sscanf( LutRedDescriptor.c_str(), + "%d\\%d\\%d", + &lengthB, &debB, &nbitsB ); + if( nbRead != 3 ) + { + dbg.Verbose(0, "PixelConvert::BuildLUTRGBA: wrong blue LUT descriptor"); + } + + //////////////////////////////////////////////////////// + if ( ( ! LutRedData ) || ( ! LutGreenData ) || ( ! LutBlueData ) ) + { + return; + } + + //////////////////////////////////////////////// + // forge the 4 * 8 Bits Red/Green/Blue/Alpha LUT + LutRGBA = new uint8_t[ 1024 ]; // 256 * 4 (R, G, B, Alpha) + if ( !LutRGBA ) + { + return; + } + memset( LutRGBA, 0, 1024 ); + + int mult; + if ( ( nbitsR == 16 ) && ( BitsAllocated == 8 ) ) + { + // when LUT item size is different than pixel size + mult = 2; // high byte must be = low byte + } + else + { + // See PS 3.3-2003 C.11.1.1.2 p 619 + mult = 1; + } + + // if we get a black image, let's just remove the '+1' + // from 'i*mult+1' and check again + // if it works, we shall have to check the 3 Palettes + // to see which byte is ==0 (first one, or second one) + // and fix the code + // We give up the checking to avoid some (useless ?)overhead + // (optimistic asumption) + int i; + uint8_t* a = LutRGBA + 0; + for( i=0; i < lengthR; ++i ) + { + *a = LutRedData[i*mult+1]; + a += 4; + } + + a = LutRGBA + 1; + for( i=0; i < lengthG; ++i) + { + *a = LutGreenData[i*mult+1]; + a += 4; + } + + a = LutRGBA + 2; + for(i=0; i < lengthB; ++i) + { + *a = LutBlueData[i*mult+1]; + a += 4; + } + + a = LutRGBA + 3; + for(i=0; i < 256; ++i) + { + *a = 1; // Alpha component + a += 4; + } +} + +/** + * \brief Build the RGB image from the Decompressed imagage and the LUTs. + */ +bool PixelConvert::BuildRGBImage() +{ + if ( RGB ) + { + // The job is already done. + return true; + } + + if ( ! Decompressed ) + { + // The job can't be done + return false; + } + + BuildLUTRGBA(); + if ( ! LutRGBA ) + { + // The job can't be done + return false; + } + + // Build RGB Pixels + AllocateRGB(); + uint8_t* localRGB = RGB; + for (size_t i = 0; i < DecompressedSize; ++i ) + { + int j = Decompressed[i] * 4; + *localRGB++ = LutRGBA[j]; + *localRGB++ = LutRGBA[j+1]; + *localRGB++ = LutRGBA[j+2]; + } + return true; +} + +/** + * \brief Print self. + * @param indent Indentation string to be prepended during printing. + * @param os Stream to print to. + */ +void PixelConvert::Print( std::string indent, std::ostream &os ) +{ + os << indent + << "--- Pixel information -------------------------" + << std::endl; + os << indent + << "Pixel Data: offset " << PixelOffset + << " x" << std::hex << PixelOffset << std::dec + << " length " << PixelDataLength + << " x" << std::hex << PixelDataLength << std::dec + << std::endl; + + if ( IsRLELossless ) + { + if ( RLEInfo ) + { + RLEInfo->Print( indent, os ); + } + else + { + dbg.Verbose(0, "PixelConvert::Print: set as RLE file " + "but NO RLEinfo present."); + } + } + + if ( IsJPEG2000 || IsJPEGLossless ) + { + if ( JPEGInfo ) + { + JPEGInfo->Print( indent, os ); + } + else + { + dbg.Verbose(0, "PixelConvert::Print: set as JPEG file " + "but NO JPEGinfo present."); + } + } } } // end namespace gdcm