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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmPhotometricInterpretation.h"
#include "gdcmTransferSyntax.h"
#include "gdcmTrace.h"
#include "gdcmCodeString.h"
#include "gdcmVR.h"
#include <cassert>
#include <cstdlib>
#include <cstring>
namespace gdcm
{
/*
* HSV/ARGB/CMYK can still be found in PS 3.3 - 2000:
*
* HSV = Pixel data represent a color image described by hue, saturation, and value image planes.
* The minimum sample value for each HSV plane represents a minimum value of each vector. This
* value may be used only when Samples per Pixel (0028,0002) has a value of 3.
*
* ARGB = Pixel data represent a color image described by red, green, blue, and alpha image planes.
* The minimum sample value for each RGB plane represents minimum intensity of the color. The
* alpha plane is passed through Palette Color Lookup Tables. If the alpha pixel value is greater than
* 0, the red, green, and blue lookup table values override the red, green, and blue, pixel plane colors.
* This value may be used only when Samples per Pixel (0028,0002) has a value of 4.
*
* CMYK = Pixel data represent a color image described by cyan, magenta, yellow, and black image
* planes. The minimum sample value for each CMYK plane represents a minimum intensity of the
* color. This value may be used only when Samples per Pixel (0028,0002) has a value of 4.
*
*/
static const char *PIStrings[] = {
"UNKNOW",
"MONOCHROME1 ",
"MONOCHROME2 ",
"PALETTE COLOR ",
"RGB ",
"HSV ",
"ARGB",
"CMYK",
"YBR_FULL",
"YBR_FULL_422",
"YBR_PARTIAL_422 ",
"YBR_PARTIAL_420 ",
"YBR_ICT ",
"YBR_RCT ",
0
};
const char *PhotometricInterpretation::GetPIString(PIType pi)
{
//assert( pi < PhotometricInterpretation::PI_END );
return PIStrings[pi];
}
PhotometricInterpretation::PIType PhotometricInterpretation::GetPIType(const char *inputpi)
{
if( !inputpi ) return PI_END;
// The following code allows use to handle whitespace and invalid padding:
CodeString codestring = inputpi;
CSComp cs = codestring.GetAsString();
const char *pi = cs.c_str();
for( unsigned int i = 1; PIStrings[i] != 0; ++i )
{
if( strcmp(pi, PIStrings[i]) == 0 )
{
return PIType(i);
}
}
// Ouch ! We did not find anything, that's pretty bad, let's hope that
// the toolkit which wrote the image is buggy and tolerate \0 padded ASCII
// string
// warning this piece of code will do MONOCHROME -> MONOCHROME1
static const unsigned int n = sizeof(PIStrings) / sizeof(*PIStrings) - 1;
size_t len = strlen(pi);
if( pi[len-1] == ' ' ) len--;
for( unsigned int i = 1; i < n; ++i )
{
if( strncmp(pi, PIStrings[i], len ) == 0 )
{
gdcmDebugMacro( "PhotometricInterpretation was found: [" << pi
<< "], but is invalid. It should be padded with a space" );
return PIType(i);
}
}
//assert(0);
return PI_END;
}
bool PhotometricInterpretation::IsRetired(PIType pi)
{
return pi == HSV || pi == ARGB || pi == CMYK;
}
unsigned short PhotometricInterpretation::GetSamplesPerPixel() const
{
if ( PIField == UNKNOW ) return 0;
else if( PIField == MONOCHROME1
|| PIField == MONOCHROME2
|| PIField == PALETTE_COLOR )
{
return 1;
}
else if( PIField == ARGB || PIField == CMYK )
{
return 4;
}
else
{
assert( PIField != PI_END );
assert( //PIField == PALETTE_COLOR
PIField == RGB
|| PIField == HSV
//|| PIField == ARGB
//|| PIField == CMYK
|| PIField == YBR_FULL
|| PIField == YBR_FULL_422
|| PIField == YBR_PARTIAL_422
|| PIField == YBR_PARTIAL_420
|| PIField == YBR_ICT
|| PIField == YBR_RCT
);
return 3;
}
}
bool PhotometricInterpretation::IsLossy() const
{
return !IsLossless();
}
bool PhotometricInterpretation::IsLossless() const
{
switch ( PIField )
{
case MONOCHROME1:
case MONOCHROME2:
case PALETTE_COLOR:
case RGB:
case HSV:
case ARGB:
case CMYK:
case YBR_FULL:
case YBR_RCT:
return true;
break;
case YBR_FULL_422:
case YBR_PARTIAL_422:
case YBR_PARTIAL_420:
case YBR_ICT:
return false;
break;
default:
assert(0);
return false;
}
assert( 0 ); // technically one should not reach here, unless UNKNOW ...
return false;
}
const char *PhotometricInterpretation::GetString() const
{
return PhotometricInterpretation::GetPIString( PIField );
}
bool PhotometricInterpretation::IsSameColorSpace( PhotometricInterpretation const &pi ) const
{
if( PIField == pi ) return true;
// else
if( PIField == RGB
|| PIField == YBR_RCT
|| PIField == YBR_ICT )
{
if( pi == RGB || pi == YBR_RCT || pi == YBR_ICT ) return true;
}
if( PIField == YBR_FULL
|| PIField == YBR_FULL_422 )
{
if( pi == YBR_FULL || pi == YBR_FULL_422 ) return true;
}
return false;
}
//PhotometricInterpretation::PIType PhotometricInterpretation::GetEquivalent(TransferSyntax const &ts)
//{
// // A.8.5.4 Multi-frame True Color SC Image IOD Content Constraints
// if( PIField == RGB )
// {
// if( ts == TransferSyntax::
// }
// return PIField;
//}
//
} // end namespace gdcm
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