Program: gdcm
Module: $RCSfile: gdcmPixelConvert.cxx,v $
Language: C++
- Date: $Date: 2004/10/15 10:43:28 $
- Version: $Revision: 1.14 $
+ Date: $Date: 2004/11/24 10:23:47 $
+ Version: $Revision: 1.32 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
#include "gdcmDebug.h"
#include "gdcmPixelConvert.h"
+#include <fstream>
+#include <stdio.h>
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);
//-----------------------------------------------------------------------------
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 ) {
+ RGB = 0;
+
+ if ( Decompressed )
+ {
delete [] Decompressed;
}
+ Decompressed = 0;
+
+ if ( LutRGBA )
+ {
+ delete [] LutRGBA;
+ }
+ LutRGBA = 0;
}
PixelConvert::~PixelConvert()
if ( RGB ) {
delete [] RGB;
}
- RGB = new uint8_t[RGBSize];
+ RGB = new uint8_t[ RGBSize ];
}
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]
*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 ?
}
}
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;
{
for ( unsigned int j = 0; j < PixelNumber; j++ )
{
- *(x++) = *(a++);
*(x++) = *(b++);
+ *(x++) = *(a++);
}
}
}
/**
- * \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
// 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;
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++ )
{
/**
* \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;
++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,
subDecompressed += decompressedSegmentSize;
}
}
-
+
if ( BitsAllocated == 16 )
{
// Try to deal with RLE 16 Bits
(void)DecompressRLE16BitsFromRLE8Bits( ZSize );
}
-
+
return true;
}
void PixelConvert::ConvertSwapZone()
{
unsigned int i;
-
+
if( BitsAllocated == 16 )
{
uint16_t* im16 = (uint16_t*)Decompressed;
/**
* \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]
it != JPEGInfo->Fragments.end();
++it )
{
- fseek( fp, (*it)->Offset, SEEK_SET );
+ fp->seekg( (*it)->Offset, std::ios_base::beg);
if ( IsJPEG2000 )
{
return false;
}
}
- else if ( BitsStored == 12)
+ else if ( BitsStored <= 12)
{
// Reading Fragment pixels
if ( ! gdcm_read_JPEG_file12 ( fp, localDecompressed ) )
return false;
}
}
- else if ( BitsStored == 16)
+ else if ( BitsStored <= 16)
{
// Reading Fragment pixels
if ( ! gdcm_read_JPEG_file16 ( fp, localDecompressed ) )
"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;
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
//
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++ )
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;
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++);
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.
if ( !fp )
{
- dbg.Verbose( 0, "PixelConvert::ReadAndDecompressPixelData: "
- "unavailable file pointer." );
+ dbg.Verbose( 0, "PixelConvert::ReadAndDecompressPixelData: "
+ "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." );
+ 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 )
+ // This problem can be found when some obvious informations are found
+ // after the field containing the image datas. In this case, these
+ // bad datas are added to the size of the image (in the PixelDataLength
+ // variable). But DecompressedSize is the right size of the image !
+ if( PixelDataLength != DecompressedSize)
{
dbg.Verbose( 0, "PixelConvert::ReadAndDecompressPixelData: "
- "reading of uncompressed pixel data failed." );
+ "Mismatch between PixelConvert and DecompressedSize." );
+ }
+ if( PixelDataLength > DecompressedSize)
+ {
+ fp->read( (char*)Decompressed, DecompressedSize);
+ }
+ else
+ {
+ fp->read( (char*)Decompressed, PixelDataLength);
+ }
+
+ if ( fp->fail() || fp->eof())//Fp->gcount() == 1
+ {
+ dbg.Verbose( 0, "PixelConvert::ReadAndDecompressPixelData: "
+ "reading of decompressed pixel data failed." );
return false;
}
}
// [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;
return true;
}
-void PixelConvert::ComputeDecompressedImageDataSize()
+void PixelConvert::ComputeDecompressedAndRGBSizes()
{
int bitsAllocated = BitsAllocated;
// Number of "Bits Allocated" is fixed to 16 when it's 12, since
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 == ImplicitVRLittleEndianDLXGE
+ || 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;
+ }
+ }
+ }
+
+ if(fp) 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
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff