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/******************************************************************************
*
* Purpose: Various public (documented) utility functions.
*
******************************************************************************
* Copyright (c) 2009
* PCI Geomatics, 50 West Wilmot Street, Richmond Hill, Ont, Canada
*
* 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 "pcidsk_config.h"
#include "pcidsk_types.h"
#include "pcidsk_exception.h"
#include "core/pcidsk_utils.h"
#include <cstdlib>
#include <cstring>
using namespace PCIDSK;
/************************************************************************/
/* DataTypeSize() */
/************************************************************************/
/**
* Return size of data type.
*
* Note that type CHN_BIT exists to represent one bit backed data from
* bitmap segments, but because the return of this functions is measured
* in bytes, the size of a CHN_BIT pixel cannot be properly returned (one
* eighth of a byte), so "1" is returned instead.
*
* @param chan_type the channel type enumeration value.
*
* @return the size of the passed data type in bytes, or zero for unknown
* values.
*/
int PCIDSK::DataTypeSize( eChanType chan_type )
{
switch( chan_type )
{
case CHN_8U:
return 1;
case CHN_16S:
return 2;
case CHN_16U:
return 2;
case CHN_32R:
return 4;
case CHN_C16U:
return 4;
case CHN_C16S:
return 4;
case CHN_C32R:
return 8;
case CHN_BIT:
return 1; // not really accurate!
default:
return 0;
}
}
/************************************************************************/
/* DataTypeName() */
/************************************************************************/
/**
* Return name for the data type.
*
* The returned values are suitable for display to people, and matches
* the portion of the name after the underscore (ie. "8U" for CHN_8U.
*
* @param chan_type the channel type enumeration value to be translated.
*
* @return a string representing the data type.
*/
std::string PCIDSK::DataTypeName( eChanType chan_type )
{
switch( chan_type )
{
case CHN_8U:
return "8U";
case CHN_16S:
return "16S";
case CHN_16U:
return "16U";
case CHN_32R:
return "32R";
case CHN_C16U:
return "C16U";
case CHN_C16S:
return "C16S";
case CHN_C32R:
return "C32R";
case CHN_BIT:
return "BIT";
default:
return "UNK";
}
}
/************************************************************************/
/* GetDataTypeFromName() */
/************************************************************************/
/**
* @brief Return the segment type code based on the contents of type_name
*
* @param the type name, as a string
*
* @return the channel type code
*/
eChanType PCIDSK::GetDataTypeFromName(std::string const& type_name)
{
if (type_name.find("8U") != std::string::npos) {
return CHN_8U;
} else if (type_name.find("C16U") != std::string::npos) {
return CHN_C16U;
} else if (type_name.find("C16S") != std::string::npos) {
return CHN_C16S;
} else if (type_name.find("C32R") != std::string::npos) {
return CHN_C32R;
} else if (type_name.find("16U") != std::string::npos) {
return CHN_16U;
} else if (type_name.find("16S") != std::string::npos) {
return CHN_16S;
} else if (type_name.find("32R") != std::string::npos) {
return CHN_32R;
} else if (type_name.find("BIT") != std::string::npos) {
return CHN_BIT;
} else {
return CHN_UNKNOWN;
}
}
/************************************************************************/
/* IsDataTypeComplex() */
/************************************************************************/
/**
* @brief Return whether or not the data type is complex
*
* @param the type
*
* @return true if the data type is complex, false otherwise
*/
bool PCIDSK::IsDataTypeComplex(eChanType type)
{
switch(type)
{
case CHN_C32R:
case CHN_C16U:
case CHN_C16S:
return true;
default:
return false;
}
}
/************************************************************************/
/* SegmentTypeName() */
/************************************************************************/
/**
* Return name for segment type.
*
* Returns a short name for the segment type code passed in. This is normally
* the portion of the enumeration name that comes after the underscore - ie.
* "BIT" for SEG_BIT.
*
* @param type the segment type code.
*
* @return the string for the segment type.
*/
std::string PCIDSK::SegmentTypeName( eSegType type )
{
switch( type )
{
case SEG_BIT:
return "BIT";
case SEG_VEC:
return "VEC";
case SEG_SIG:
return "SIG";
case SEG_TEX:
return "TEX";
case SEG_GEO:
return "GEO";
case SEG_ORB:
return "ORB";
case SEG_LUT:
return "LUT";
case SEG_PCT:
return "PCT";
case SEG_BLUT:
return "BLUT";
case SEG_BPCT:
return "BPCT";
case SEG_BIN:
return "BIN";
case SEG_ARR:
return "ARR";
case SEG_SYS:
return "SYS";
case SEG_GCPOLD:
return "GCPOLD";
case SEG_GCP2:
return "GCP2";
default:
return "UNKNOWN";
}
}
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