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ultimatepp/bazaar/plugin/gdal/gcore/gdal_rat.cpp
cxl 23ff1e7e82 .gdal moved to bazaar 
git-svn-id: svn://ultimatepp.org/upp/trunk@9273 f0d560ea-af0d-0410-9eb7-867de7ffcac7
2015-12-07 13:36:24 +00:00

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/******************************************************************************
* $Id: gdal_rat.cpp 29243 2015-05-24 15:53:26Z rouault $
*
* Project: GDAL Core
* Purpose: Implementation of GDALRasterAttributeTable and related classes.
* Author: Frank Warmerdam, warmerdam@pobox.com
*
******************************************************************************
* Copyright (c) 2005, Frank Warmerdam
* Copyright (c) 2009, Even Rouault <even dot rouault at mines-paris dot org>
*
* 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 "gdal_priv.h"
#include "gdal_rat.h"
#include "json.h"
#include "ogrgeojsonwriter.h"
CPL_CVSID("$Id: gdal_rat.cpp 29243 2015-05-24 15:53:26Z rouault $");
/**
* \class GDALRasterAttributeTable
*
* The GDALRasterAttributeTable (or RAT) class is used to encapsulate a table
* used to provide attribute information about pixel values. Each row
* in the table applies to a range of pixel values (or a single value in
* some cases), and might have attributes such as the histogram count for
* that range, the color pixels of that range should be drawn names of classes
* or any other generic information.
*
* Raster attribute tables can be used to represent histograms, color tables,
* and classification information.
*
* Each column in a raster attribute table has a name, a type (integer,
* floating point or string), and a GDALRATFieldUsage. The usage distinguishes
* columns with particular understood purposes (such as color, histogram
* count, name) and columns that have specific purposes not understood by
* the library (long label, suitability_for_growing_wheat, etc).
*
* In the general case each row has a column indicating the minimum pixel
* values falling into that category, and a column indicating the maximum
* pixel value. These are indicated with usage values of GFU_Min, and
* GFU_Max. In other cases where each row is a discrete pixel value, one
* column of usage GFU_MinMax can be used.
*
* In other cases all the categories are of equal size and regularly spaced
* and the categorization information can be determine just by knowing the
* value at which the categories start, and the size of a category. This
* is called "Linear Binning" and the information is kept specially on
* the raster attribute table as a whole.
*
* RATs are normally associated with GDALRasterBands and be be queried
* using the GDALRasterBand::GetDefaultRAT() method.
*/
/************************************************************************/
/* ~GDALRasterAttributeTable() */
/* */
/* Virtual Destructor */
/************************************************************************/
GDALRasterAttributeTable::~GDALRasterAttributeTable()
{
}
/************************************************************************/
/* ValuesIO() */
/* */
/* Default Implementations */
/************************************************************************/
/**
* \brief Read or Write a block of doubles to/from the Attribute Table.
*
* This method is the same as the C function GDALRATValuesIOAsDouble().
*
* @param eRWFlag Either GF_Read or GF_Write
* @param iField column of the Attribute Table
* @param iStartRow start row to start reading/writing (zero based)
* @param iLength number of rows to read or write
* @param pdfData pointer to array of doubles to read/write. Should be at least iLength long.
*
* @return CE_None or CE_Failure if iStartRow + iLength greater than number of rows in table.
*/
CPLErr GDALRasterAttributeTable::ValuesIO(GDALRWFlag eRWFlag, int iField, int iStartRow, int iLength, double *pdfData)
{
int iIndex;
if( (iStartRow + iLength) > GetRowCount() )
{
return CE_Failure;
}
if( eRWFlag == GF_Read )
{
for(iIndex = iStartRow; iIndex < (iStartRow + iLength); iIndex++ )
{
pdfData[iIndex] = GetValueAsDouble(iIndex, iField);
}
}
else
{
for(iIndex = iStartRow; iIndex < (iStartRow + iLength); iIndex++ )
{
SetValue(iIndex, iField, pdfData[iIndex]);
}
}
return CE_None;
}
/************************************************************************/
/* GDALRATValuesIOAsDouble() */
/************************************************************************/
/**
* \brief Read or Write a block of doubles to/from the Attribute Table.
*
* This function is the same as the C++ method GDALRasterAttributeTable::ValuesIO()
*/
CPLErr CPL_STDCALL GDALRATValuesIOAsDouble( GDALRasterAttributeTableH hRAT, GDALRWFlag eRWFlag,
int iField, int iStartRow, int iLength, double *pdfData )
{
VALIDATE_POINTER1( hRAT, "GDALRATValuesIOAsDouble", CE_Failure );
return ((GDALRasterAttributeTable *) hRAT)->ValuesIO(eRWFlag, iField, iStartRow, iLength, pdfData);
}
/**
* \brief Read or Write a block of integers to/from the Attribute Table.
*
* This method is the same as the C function GDALRATValuesIOAsInteger().
*
* @param eRWFlag Either GF_Read or GF_Write
* @param iField column of the Attribute Table
* @param iStartRow start row to start reading/writing (zero based)
* @param iLength number of rows to read or write
* @param pnData pointer to array of ints to read/write. Should be at least iLength long.
*
* @return CE_None or CE_Failure if iStartRow + iLength greater than number of rows in table.
*/
CPLErr GDALRasterAttributeTable::ValuesIO(GDALRWFlag eRWFlag, int iField, int iStartRow, int iLength, int *pnData)
{
int iIndex;
if( (iStartRow + iLength) > GetRowCount() )
{
return CE_Failure;
}
if( eRWFlag == GF_Read )
{
for(iIndex = iStartRow; iIndex < (iStartRow + iLength); iIndex++ )
{
pnData[iIndex] = GetValueAsInt(iIndex, iField);
}
}
else
{
for(iIndex = iStartRow; iIndex < (iStartRow + iLength); iIndex++ )
{
SetValue(iIndex, iField, pnData[iIndex]);
}
}
return CE_None;
}
/************************************************************************/
/* GDALRATValuesIOAsInteger() */
/************************************************************************/
/**
* \brief Read or Write a block of ints to/from the Attribute Table.
*
* This function is the same as the C++ method GDALRasterAttributeTable::ValuesIO()
*/
CPLErr CPL_STDCALL GDALRATValuesIOAsInteger( GDALRasterAttributeTableH hRAT, GDALRWFlag eRWFlag,
int iField, int iStartRow, int iLength, int *pnData)
{
VALIDATE_POINTER1( hRAT, "GDALRATValuesIOAsInteger", CE_Failure );
return ((GDALRasterAttributeTable *) hRAT)->ValuesIO(eRWFlag, iField, iStartRow, iLength, pnData);
}
/**
* \brief Read or Write a block of strings to/from the Attribute Table.
*
* This method is the same as the C function GDALRATValuesIOAsString().
* When reading, papszStrList must be already allocated to the correct size.
* The caller is expected to call CPLFree on each read string.
*
* @param eRWFlag Either GF_Read or GF_Write
* @param iField column of the Attribute Table
* @param iStartRow start row to start reading/writing (zero based)
* @param iLength number of rows to read or write
* @param papszStrList pointer to array of strings to read/write. Should be at least iLength long.
*
* @return CE_None or CE_Failure if iStartRow + iLength greater than number of rows in table.
*/
CPLErr GDALRasterAttributeTable::ValuesIO(GDALRWFlag eRWFlag, int iField, int iStartRow, int iLength, char **papszStrList)
{
int iIndex;
if( (iStartRow + iLength) > GetRowCount() )
{
return CE_Failure;
}
if( eRWFlag == GF_Read )
{
for(iIndex = iStartRow; iIndex < (iStartRow + iLength); iIndex++ )
{
papszStrList[iIndex] = VSIStrdup(GetValueAsString(iIndex, iField));
}
}
else
{
for(iIndex = iStartRow; iIndex < (iStartRow + iLength); iIndex++ )
{
SetValue(iIndex, iField, papszStrList[iIndex]);
}
}
return CE_None;
}
/************************************************************************/
/* GDALRATValuesIOAsString() */
/************************************************************************/
/**
* \brief Read or Write a block of strings to/from the Attribute Table.
*
* This function is the same as the C++ method GDALRasterAttributeTable::ValuesIO()
*/
CPLErr CPL_STDCALL GDALRATValuesIOAsString( GDALRasterAttributeTableH hRAT, GDALRWFlag eRWFlag,
int iField, int iStartRow, int iLength, char **papszStrList)
{
VALIDATE_POINTER1( hRAT, "GDALRATValuesIOAsString", CE_Failure );
return ((GDALRasterAttributeTable *) hRAT)->ValuesIO(eRWFlag, iField, iStartRow, iLength, papszStrList);
}
/************************************************************************/
/* SetRowCount() */
/************************************************************************/
/**
* \brief Set row count.
*
* Resizes the table to include the indicated number of rows. Newly created
* rows will be initialized to their default values - "" for strings,
* and zero for numeric fields.
*
* This method is the same as the C function GDALRATSetRowCount().
*
* @param nNewCount the new number of rows.
*/
void GDALRasterAttributeTable::SetRowCount( CPL_UNUSED int nNewCount )
{
}
/************************************************************************/
/* GDALRATSetRowCount() */
/************************************************************************/
/**
* \brief Set row count.
*
* This function is the same as the C++ method GDALRasterAttributeTable::SetRowCount()
*/
void CPL_STDCALL
GDALRATSetRowCount( GDALRasterAttributeTableH hRAT, int nNewCount )
{
VALIDATE_POINTER0( hRAT, "GDALRATSetRowCount" );
((GDALRasterAttributeTable *) hRAT)->SetRowCount( nNewCount );
}
/************************************************************************/
/* GetRowOfValue() */
/************************************************************************/
/**
* \brief Get row for pixel value.
*
* Given a raw pixel value, the raster attribute table is scanned to
* determine which row in the table applies to the pixel value. The
* row index is returned.
*
* This method is the same as the C function GDALRATGetRowOfValue().
*
* @param dfValue the pixel value.
*
* @return the row index or -1 if no row is appropriate.
*/
int GDALRasterAttributeTable::GetRowOfValue( CPL_UNUSED double dfValue ) const
{
return -1;
}
/************************************************************************/
/* GDALRATGetRowOfValue() */
/************************************************************************/
/**
* \brief Get row for pixel value.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetRowOfValue()
*/
int CPL_STDCALL
GDALRATGetRowOfValue( GDALRasterAttributeTableH hRAT, double dfValue )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetRowOfValue", 0 );
return ((GDALRasterAttributeTable *) hRAT)->GetRowOfValue( dfValue );
}
/************************************************************************/
/* GetRowOfValue() */
/* */
/* Int arg for now just converted to double. Perhaps we will */
/* handle this in a special way some day? */
/************************************************************************/
int GDALRasterAttributeTable::GetRowOfValue( int nValue ) const
{
return GetRowOfValue( (double) nValue );
}
/************************************************************************/
/* CreateColumn() */
/************************************************************************/
/**
* \brief Create new column.
*
* If the table already has rows, all row values for the new column will
* be initialized to the default value ("", or zero). The new column is
* always created as the last column, can will be column (field)
* "GetColumnCount()-1" after CreateColumn() has completed successfully.
*
* This method is the same as the C function GDALRATCreateColumn().
*
* @param pszFieldName the name of the field to create.
* @param eFieldType the field type (integer, double or string).
* @param eFieldUsage the field usage, GFU_Generic if not known.
*
* @return CE_None on success or CE_Failure if something goes wrong.
*/
CPLErr GDALRasterAttributeTable::CreateColumn( CPL_UNUSED const char *pszFieldName,
CPL_UNUSED GDALRATFieldType eFieldType,
CPL_UNUSED GDALRATFieldUsage eFieldUsage )
{
return CE_Failure;
}
/************************************************************************/
/* GDALRATCreateColumn() */
/************************************************************************/
/**
* \brief Create new column.
*
* This function is the same as the C++ method GDALRasterAttributeTable::CreateColumn()
*/
CPLErr CPL_STDCALL GDALRATCreateColumn( GDALRasterAttributeTableH hRAT,
const char *pszFieldName,
GDALRATFieldType eFieldType,
GDALRATFieldUsage eFieldUsage )
{
VALIDATE_POINTER1( hRAT, "GDALRATCreateColumn", CE_Failure );
return ((GDALRasterAttributeTable *) hRAT)->CreateColumn( pszFieldName,
eFieldType,
eFieldUsage );
}
/************************************************************************/
/* SetLinearBinning() */
/************************************************************************/
/**
* \brief Set linear binning information.
*
* For RATs with equal sized categories (in pixel value space) that are
* evenly spaced, this method may be used to associate the linear binning
* information with the table.
*
* This method is the same as the C function GDALRATSetLinearBinning().
*
* @param dfRow0MinIn the lower bound (pixel value) of the first category.
* @param dfBinSizeIn the width of each category (in pixel value units).
*
* @return CE_None on success or CE_Failure on failure.
*/
CPLErr GDALRasterAttributeTable::SetLinearBinning( CPL_UNUSED double dfRow0MinIn,
CPL_UNUSED double dfBinSizeIn )
{
return CE_Failure;
}
/************************************************************************/
/* GDALRATSetLinearBinning() */
/************************************************************************/
/**
* \brief Set linear binning information.
*
* This function is the same as the C++ method GDALRasterAttributeTable::SetLinearBinning()
*/
CPLErr CPL_STDCALL
GDALRATSetLinearBinning( GDALRasterAttributeTableH hRAT,
double dfRow0Min, double dfBinSize )
{
VALIDATE_POINTER1( hRAT, "GDALRATSetLinearBinning", CE_Failure );
return ((GDALRasterAttributeTable *) hRAT)->SetLinearBinning(
dfRow0Min, dfBinSize );
}
/************************************************************************/
/* GetLinearBinning() */
/************************************************************************/
/**
* \brief Get linear binning information.
*
* Returns linear binning information if any is associated with the RAT.
*
* This method is the same as the C function GDALRATGetLinearBinning().
*
* @param pdfRow0Min (out) the lower bound (pixel value) of the first category.
* @param pdfBinSize (out) the width of each category (in pixel value units).
*
* @return TRUE if linear binning information exists or FALSE if there is none.
*/
int GDALRasterAttributeTable::GetLinearBinning( CPL_UNUSED double *pdfRow0Min,
CPL_UNUSED double *pdfBinSize ) const
{
return FALSE;
}
/************************************************************************/
/* GDALRATGetLinearBinning() */
/************************************************************************/
/**
* \brief Get linear binning information.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetLinearBinning()
*/
int CPL_STDCALL
GDALRATGetLinearBinning( GDALRasterAttributeTableH hRAT,
double *pdfRow0Min, double *pdfBinSize )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetLinearBinning", 0 );
return ((GDALRasterAttributeTable *) hRAT)->GetLinearBinning(
pdfRow0Min, pdfBinSize );
}
/************************************************************************/
/* Serialize() */
/************************************************************************/
CPLXMLNode *GDALRasterAttributeTable::Serialize() const
{
CPLXMLNode *psTree = NULL;
CPLXMLNode *psRow = NULL;
if( ( GetColumnCount() == 0 ) && ( GetRowCount() == 0 ) )
return NULL;
psTree = CPLCreateXMLNode( NULL, CXT_Element, "GDALRasterAttributeTable" );
/* -------------------------------------------------------------------- */
/* Add attributes with regular binning info if appropriate. */
/* -------------------------------------------------------------------- */
char szValue[128];
double dfRow0Min, dfBinSize;
if( GetLinearBinning(&dfRow0Min, &dfBinSize) )
{
CPLsprintf( szValue, "%.16g", dfRow0Min );
CPLCreateXMLNode(
CPLCreateXMLNode( psTree, CXT_Attribute, "Row0Min" ),
CXT_Text, szValue );
CPLsprintf( szValue, "%.16g", dfBinSize );
CPLCreateXMLNode(
CPLCreateXMLNode( psTree, CXT_Attribute, "BinSize" ),
CXT_Text, szValue );
}
/* -------------------------------------------------------------------- */
/* Define each column. */
/* -------------------------------------------------------------------- */
int iCol;
int iColCount = GetColumnCount();
for( iCol = 0; iCol < iColCount; iCol++ )
{
CPLXMLNode *psCol;
psCol = CPLCreateXMLNode( psTree, CXT_Element, "FieldDefn" );
sprintf( szValue, "%d", iCol );
CPLCreateXMLNode(
CPLCreateXMLNode( psCol, CXT_Attribute, "index" ),
CXT_Text, szValue );
CPLCreateXMLElementAndValue( psCol, "Name",
GetNameOfCol(iCol) );
sprintf( szValue, "%d", (int) GetTypeOfCol(iCol) );
CPLCreateXMLElementAndValue( psCol, "Type", szValue );
sprintf( szValue, "%d", (int) GetUsageOfCol(iCol) );
CPLCreateXMLElementAndValue( psCol, "Usage", szValue );
}
/* -------------------------------------------------------------------- */
/* Write out each row. */
/* -------------------------------------------------------------------- */
int iRow;
int iRowCount = GetRowCount();
CPLXMLNode *psTail = NULL;
for( iRow = 0; iRow < iRowCount; iRow++ )
{
psRow = CPLCreateXMLNode( NULL, CXT_Element, "Row" );
if( psTail == NULL )
CPLAddXMLChild( psTree, psRow );
else
psTail->psNext = psRow;
psTail = psRow;
sprintf( szValue, "%d", iRow );
CPLCreateXMLNode(
CPLCreateXMLNode( psRow, CXT_Attribute, "index" ),
CXT_Text, szValue );
for( iCol = 0; iCol < iColCount; iCol++ )
{
const char *pszValue = szValue;
if( GetTypeOfCol(iCol) == GFT_Integer )
sprintf( szValue, "%d", GetValueAsInt(iRow, iCol) );
else if( GetTypeOfCol(iCol) == GFT_Real )
CPLsprintf( szValue, "%.16g", GetValueAsDouble(iRow, iCol) );
else
pszValue = GetValueAsString(iRow, iCol);
CPLCreateXMLElementAndValue( psRow, "F", pszValue );
}
}
return psTree;
}
/************************************************************************/
/* SerializeJSON() */
/************************************************************************/
void *GDALRasterAttributeTable::SerializeJSON() const
{
json_object *poRAT = json_object_new_object();
if( ( GetColumnCount() == 0 ) && ( GetRowCount() == 0 ) )
return poRAT;
/* -------------------------------------------------------------------- */
/* Add attributes with regular binning info if appropriate. */
/* -------------------------------------------------------------------- */
double dfRow0Min, dfBinSize;
json_object *poRow0Min, *poBinSize;
if( GetLinearBinning(&dfRow0Min, &dfBinSize) )
{
poRow0Min = json_object_new_double_with_precision( dfRow0Min, 16 );
json_object_object_add( poRAT, "row0Min", poRow0Min );
poBinSize = json_object_new_double_with_precision( dfBinSize, 16 );
json_object_object_add( poRAT, "binSize", poBinSize );
}
/* -------------------------------------------------------------------- */
/* Define each column. */
/* -------------------------------------------------------------------- */
int iCol;
int iColCount = GetColumnCount();
json_object *poFieldDefnArray = json_object_new_array();
json_object *poFieldDefn, *poColumnIndex, *poName, *poType, *poUsage;
for( iCol = 0; iCol < iColCount; iCol++ )
{
poFieldDefn = json_object_new_object();
poColumnIndex = json_object_new_int( iCol );
json_object_object_add( poFieldDefn, "index", poColumnIndex );
poName = json_object_new_string( GetNameOfCol(iCol) );
json_object_object_add( poFieldDefn, "name", poName );
poType = json_object_new_int( (int) GetTypeOfCol(iCol) );
json_object_object_add( poFieldDefn, "type", poType );
poUsage = json_object_new_int( (int) GetUsageOfCol(iCol) );
json_object_object_add( poFieldDefn, "usage", poUsage );
json_object_array_add( poFieldDefnArray, poFieldDefn );
}
json_object_object_add( poRAT, "fieldDefn", poFieldDefnArray );
/* -------------------------------------------------------------------- */
/* Write out each row. */
/* -------------------------------------------------------------------- */
int iRow;
int iRowCount = GetRowCount();
json_object *poRowArray = json_object_new_array();
json_object *poRow, *poRowIndex, *poFArray, *poF;
for( iRow = 0; iRow < iRowCount; iRow++ )
{
poRow = json_object_new_object();
poRowIndex = json_object_new_int(iRow);
json_object_object_add( poRow, "index", poRowIndex );
poFArray = json_object_new_array();
for( iCol = 0; iCol < iColCount; iCol++ )
{
if( GetTypeOfCol(iCol) == GFT_Integer )
poF = json_object_new_int( GetValueAsInt(iRow, iCol) );
else if( GetTypeOfCol(iCol) == GFT_Real )
poF = json_object_new_double_with_precision( GetValueAsDouble(iRow, iCol), 16 );
else
poF = json_object_new_string( GetValueAsString(iRow, iCol) );
json_object_array_add( poFArray, poF );
}
json_object_object_add( poRow, "f", poFArray );
json_object_array_add( poRowArray, poRow );
}
json_object_object_add( poRAT, "row", poRowArray );
return poRAT;
}
/************************************************************************/
/* XMLInit() */
/************************************************************************/
CPLErr GDALRasterAttributeTable::XMLInit( CPLXMLNode *psTree,
const char * /*pszVRTPath*/ )
{
CPLAssert( GetRowCount() == 0 && GetColumnCount() == 0 );
/* -------------------------------------------------------------------- */
/* Linear binning. */
/* -------------------------------------------------------------------- */
if( CPLGetXMLValue( psTree, "Row0Min", NULL )
&& CPLGetXMLValue( psTree, "BinSize", NULL ) )
{
SetLinearBinning( CPLAtof(CPLGetXMLValue( psTree, "Row0Min","" )),
CPLAtof(CPLGetXMLValue( psTree, "BinSize","" )) );
}
/* -------------------------------------------------------------------- */
/* Column definitions */
/* -------------------------------------------------------------------- */
CPLXMLNode *psChild;
for( psChild = psTree->psChild; psChild != NULL; psChild = psChild->psNext)
{
if( psChild->eType == CXT_Element
&& EQUAL(psChild->pszValue,"FieldDefn") )
{
CreateColumn(
CPLGetXMLValue( psChild, "Name", "" ),
(GDALRATFieldType) atoi(CPLGetXMLValue( psChild, "Type", "1" )),
(GDALRATFieldUsage) atoi(CPLGetXMLValue( psChild, "Usage","0")));
}
}
/* -------------------------------------------------------------------- */
/* Row data. */
/* -------------------------------------------------------------------- */
for( psChild = psTree->psChild; psChild != NULL; psChild = psChild->psNext)
{
if( psChild->eType == CXT_Element
&& EQUAL(psChild->pszValue,"Row") )
{
int iRow = atoi(CPLGetXMLValue(psChild,"index","0"));
int iField = 0;
CPLXMLNode *psF;
for( psF = psChild->psChild; psF != NULL; psF = psF->psNext )
{
if( psF->eType != CXT_Element || !EQUAL(psF->pszValue,"F") )
continue;
if( psF->psChild != NULL && psF->psChild->eType == CXT_Text )
SetValue( iRow, iField++, psF->psChild->pszValue );
else
SetValue( iRow, iField++, "" );
}
}
}
return CE_None;
}
/************************************************************************/
/* InitializeFromColorTable() */
/************************************************************************/
/**
* \brief Initialize from color table.
*
* This method will setup a whole raster attribute table based on the
* contents of the passed color table. The Value (GFU_MinMax),
* Red (GFU_Red), Green (GFU_Green), Blue (GFU_Blue), and Alpha (GFU_Alpha)
* fields are created, and a row is set for each entry in the color table.
*
* The raster attribute table must be empty before calling
* InitializeFromColorTable().
*
* The Value fields are set based on the implicit assumption with color
* tables that entry 0 applies to pixel value 0, 1 to 1, etc.
*
* This method is the same as the C function GDALRATInitializeFromColorTable().
*
* @param poTable the color table to copy from.
*
* @return CE_None on success or CE_Failure if something goes wrong.
*/
CPLErr GDALRasterAttributeTable::InitializeFromColorTable(
const GDALColorTable *poTable )
{
int iRow;
if( GetRowCount() > 0 || GetColumnCount() > 0 )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Raster Attribute Table not empty in InitializeFromColorTable()" );
return CE_Failure;
}
SetLinearBinning( 0.0, 1.0 );
CreateColumn( "Value", GFT_Integer, GFU_MinMax );
CreateColumn( "Red", GFT_Integer, GFU_Red );
CreateColumn( "Green", GFT_Integer, GFU_Green );
CreateColumn( "Blue", GFT_Integer, GFU_Blue );
CreateColumn( "Alpha", GFT_Integer, GFU_Alpha );
SetRowCount( poTable->GetColorEntryCount() );
for( iRow = 0; iRow < poTable->GetColorEntryCount(); iRow++ )
{
GDALColorEntry sEntry;
poTable->GetColorEntryAsRGB( iRow, &sEntry );
SetValue( iRow, 0, iRow );
SetValue( iRow, 1, sEntry.c1 );
SetValue( iRow, 2, sEntry.c2 );
SetValue( iRow, 3, sEntry.c3 );
SetValue( iRow, 4, sEntry.c4 );
}
return CE_None;
}
/************************************************************************/
/* GDALRATInitializeFromColorTable() */
/************************************************************************/
/**
* \brief Initialize from color table.
*
* This function is the same as the C++ method GDALRasterAttributeTable::InitializeFromColorTable()
*/
CPLErr CPL_STDCALL
GDALRATInitializeFromColorTable( GDALRasterAttributeTableH hRAT,
GDALColorTableH hCT )
{
VALIDATE_POINTER1( hRAT, "GDALRATInitializeFromColorTable", CE_Failure );
return ((GDALRasterAttributeTable *) hRAT)->
InitializeFromColorTable( (GDALColorTable *) hCT );
}
/************************************************************************/
/* TranslateToColorTable() */
/************************************************************************/
/**
* \brief Translate to a color table.
*
* This method will attempt to create a corresponding GDALColorTable from
* this raster attribute table.
*
* This method is the same as the C function GDALRATTranslateToColorTable().
*
* @param nEntryCount The number of entries to produce (0 to nEntryCount-1), or -1 to auto-determine the number of entries.
*
* @return the generated color table or NULL on failure.
*/
GDALColorTable *GDALRasterAttributeTable::TranslateToColorTable(
int nEntryCount )
{
/* -------------------------------------------------------------------- */
/* Establish which fields are red, green, blue and alpha. */
/* -------------------------------------------------------------------- */
int iRed, iGreen, iBlue, iAlpha;
iRed = GetColOfUsage( GFU_Red );
iGreen = GetColOfUsage( GFU_Green );
iBlue = GetColOfUsage( GFU_Blue );
iAlpha = GetColOfUsage( GFU_Alpha );
if( iRed == -1 || iGreen == -1 || iBlue == -1 )
return NULL;
/* -------------------------------------------------------------------- */
/* If we aren't given an explicit number of values to scan for, */
/* search for the maximum "max" value. */
/* -------------------------------------------------------------------- */
if( nEntryCount == -1 )
{
int iRow;
int iMaxCol;
iMaxCol = GetColOfUsage( GFU_Max );
if( iMaxCol == -1 )
iMaxCol = GetColOfUsage( GFU_MinMax );
if( iMaxCol == -1 || GetRowCount() == 0 )
return NULL;
for( iRow = 0; iRow < GetRowCount(); iRow++ )
nEntryCount = MAX(nEntryCount,GetValueAsInt(iRow,iMaxCol)+1);
if( nEntryCount < 0 )
return NULL;
// restrict our number of entries to something vaguely sensible
nEntryCount = MIN(65535,nEntryCount);
}
/* -------------------------------------------------------------------- */
/* Assign values to color table. */
/* -------------------------------------------------------------------- */
GDALColorTable *poCT = new GDALColorTable();
int iEntry;
for( iEntry = 0; iEntry < nEntryCount; iEntry++ )
{
GDALColorEntry sColor;
int iRow = GetRowOfValue( iEntry );
if( iRow == -1 )
{
sColor.c1 = sColor.c2 = sColor.c3 = sColor.c4 = 0;
}
else
{
sColor.c1 = (short) GetValueAsInt( iRow, iRed );
sColor.c2 = (short) GetValueAsInt( iRow, iGreen );
sColor.c3 = (short) GetValueAsInt( iRow, iBlue );
if( iAlpha == -1 )
sColor.c4 = 255;
else
sColor.c4 = (short) GetValueAsInt( iRow, iAlpha );
}
poCT->SetColorEntry( iEntry, &sColor );
}
return poCT;
}
/************************************************************************/
/* GDALRATInitializeFromColorTable() */
/************************************************************************/
/**
* \brief Translate to a color table.
*
* This function is the same as the C++ method GDALRasterAttributeTable::TranslateToColorTable()
*/
GDALColorTableH CPL_STDCALL
GDALRATTranslateToColorTable( GDALRasterAttributeTableH hRAT,
int nEntryCount )
{
VALIDATE_POINTER1( hRAT, "GDALRATTranslateToColorTable", NULL );
return ((GDALRasterAttributeTable *) hRAT)->
TranslateToColorTable( nEntryCount );
}
/************************************************************************/
/* DumpReadable() */
/************************************************************************/
/**
* \brief Dump RAT in readable form.
*
* Currently the readable form is the XML encoding ... only barely
* readable.
*
* This method is the same as the C function GDALRATDumpReadable().
*
* @param fp file to dump to or NULL for stdout.
*/
void GDALRasterAttributeTable::DumpReadable( FILE * fp )
{
CPLXMLNode *psTree = Serialize();
char *pszXMLText = CPLSerializeXMLTree( psTree );
CPLDestroyXMLNode( psTree );
if( fp == NULL )
fp = stdout;
fprintf( fp, "%s\n", pszXMLText );
CPLFree( pszXMLText );
}
/************************************************************************/
/* GDALRATDumpReadable() */
/************************************************************************/
/**
* \brief Dump RAT in readable form.
*
* This function is the same as the C++ method GDALRasterAttributeTable::DumpReadable()
*/
void CPL_STDCALL
GDALRATDumpReadable( GDALRasterAttributeTableH hRAT, FILE *fp )
{
VALIDATE_POINTER0( hRAT, "GDALRATDumpReadable" );
((GDALRasterAttributeTable *) hRAT)->DumpReadable( fp );
}
/* \class GDALDefaultRasterAttributeTable
*
* An implementation of GDALRasterAttributeTable that keeps
* all data in memory. This is the same as the implementation
* of GDALRasterAttributeTable in GDAL <= 1.10.
*/
/************************************************************************/
/* GDALDefaultRasterAttributeTable() */
/* */
/* Simple initialization constructor. */
/************************************************************************/
//! Construct empty table.
GDALDefaultRasterAttributeTable::GDALDefaultRasterAttributeTable()
{
bColumnsAnalysed = FALSE;
nMinCol = -1;
nMaxCol = -1;
bLinearBinning = FALSE;
dfRow0Min = -0.5;
dfBinSize = 1.0;
nRowCount = 0;
}
/************************************************************************/
/* GDALCreateRasterAttributeTable() */
/************************************************************************/
/**
* \brief Construct empty table.
*
* This function is the same as the C++ method GDALDefaultRasterAttributeTable::GDALDefaultRasterAttributeTable()
*/
GDALRasterAttributeTableH CPL_STDCALL GDALCreateRasterAttributeTable()
{
return (GDALRasterAttributeTableH) (new GDALDefaultRasterAttributeTable());
}
/************************************************************************/
/* GDALDefaultRasterAttributeTable() */
/************************************************************************/
//! Copy constructor.
GDALDefaultRasterAttributeTable::GDALDefaultRasterAttributeTable(
const GDALDefaultRasterAttributeTable &oOther )
{
// We have tried to be careful to allow wholesale assignment
*this = oOther;
}
/************************************************************************/
/* ~GDALDefaultRasterAttributeTable() */
/* */
/* All magic done by magic by the container destructors. */
/************************************************************************/
GDALDefaultRasterAttributeTable::~GDALDefaultRasterAttributeTable()
{
}
/************************************************************************/
/* GDALDestroyRasterAttributeTable() */
/************************************************************************/
/**
* \brief Destroys a RAT.
*
* This function is the same as the C++ method GDALRasterAttributeTable::~GDALRasterAttributeTable()
*/
void CPL_STDCALL
GDALDestroyRasterAttributeTable( GDALRasterAttributeTableH hRAT )
{
if( hRAT != NULL )
delete static_cast<GDALRasterAttributeTable *>(hRAT);
}
/************************************************************************/
/* AnalyseColumns() */
/* */
/* Internal method to work out which column to use for various */
/* tasks. */
/************************************************************************/
void GDALDefaultRasterAttributeTable::AnalyseColumns()
{
bColumnsAnalysed = TRUE;
nMinCol = GetColOfUsage( GFU_Min );
if( nMinCol == -1 )
nMinCol = GetColOfUsage( GFU_MinMax );
nMaxCol = GetColOfUsage( GFU_Max );
if( nMaxCol == -1 )
nMaxCol = GetColOfUsage( GFU_MinMax );
}
/************************************************************************/
/* GetColumnCount() */
/************************************************************************/
int GDALDefaultRasterAttributeTable::GetColumnCount() const
{
return aoFields.size();
}
/************************************************************************/
/* GDALRATGetColumnCount() */
/************************************************************************/
/**
* \brief Fetch table column count.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetColumnCount()
*/
int CPL_STDCALL GDALRATGetColumnCount( GDALRasterAttributeTableH hRAT )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetColumnCount", 0 );
return ((GDALRasterAttributeTable *) hRAT)->GetColumnCount();
}
/************************************************************************/
/* GetNameOfCol() */
/************************************************************************/
const char *GDALDefaultRasterAttributeTable::GetNameOfCol( int iCol ) const
{
if( iCol < 0 || iCol >= (int) aoFields.size() )
return "";
else
return aoFields[iCol].sName;
}
/************************************************************************/
/* GDALRATGetNameOfCol() */
/************************************************************************/
/**
* \brief Fetch name of indicated column.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetNameOfCol()
*/
const char *CPL_STDCALL GDALRATGetNameOfCol( GDALRasterAttributeTableH hRAT,
int iCol )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetNameOfCol", NULL );
return ((GDALRasterAttributeTable *) hRAT)->GetNameOfCol( iCol );
}
/************************************************************************/
/* GetUsageOfCol() */
/************************************************************************/
GDALRATFieldUsage GDALDefaultRasterAttributeTable::GetUsageOfCol( int iCol ) const
{
if( iCol < 0 || iCol >= (int) aoFields.size() )
return GFU_Generic;
else
return aoFields[iCol].eUsage;
}
/************************************************************************/
/* GDALRATGetUsageOfCol() */
/************************************************************************/
/**
* \brief Fetch column usage value.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetUsageOfColetNameOfCol()
*/
GDALRATFieldUsage CPL_STDCALL
GDALRATGetUsageOfCol( GDALRasterAttributeTableH hRAT, int iCol )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetUsageOfCol", GFU_Generic );
return ((GDALRasterAttributeTable *) hRAT)->GetUsageOfCol( iCol );
}
/************************************************************************/
/* GetTypeOfCol() */
/************************************************************************/
GDALRATFieldType GDALDefaultRasterAttributeTable::GetTypeOfCol( int iCol ) const
{
if( iCol < 0 || iCol >= (int) aoFields.size() )
return GFT_Integer;
else
return aoFields[iCol].eType;
}
/************************************************************************/
/* GDALRATGetTypeOfCol() */
/************************************************************************/
/**
* \brief Fetch column type.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetTypeOfCol()
*/
GDALRATFieldType CPL_STDCALL
GDALRATGetTypeOfCol( GDALRasterAttributeTableH hRAT, int iCol )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetTypeOfCol", GFT_Integer );
return ((GDALRasterAttributeTable *) hRAT)->GetTypeOfCol( iCol );
}
/************************************************************************/
/* GetColOfUsage() */
/************************************************************************/
int GDALDefaultRasterAttributeTable::GetColOfUsage( GDALRATFieldUsage eUsage ) const
{
unsigned int i;
for( i = 0; i < aoFields.size(); i++ )
{
if( aoFields[i].eUsage == eUsage )
return i;
}
return -1;
}
/************************************************************************/
/* GDALRATGetColOfUsage() */
/************************************************************************/
/**
* \brief Fetch column index for given usage.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetColOfUsage()
*/
int CPL_STDCALL
GDALRATGetColOfUsage( GDALRasterAttributeTableH hRAT,
GDALRATFieldUsage eUsage )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetColOfUsage", 0 );
return ((GDALRasterAttributeTable *) hRAT)->GetColOfUsage( eUsage );
}
/************************************************************************/
/* GetRowCount() */
/************************************************************************/
int GDALDefaultRasterAttributeTable::GetRowCount() const
{
return (int) nRowCount;
}
/************************************************************************/
/* GDALRATGetUsageOfCol() */
/************************************************************************/
/**
* \brief Fetch row count.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetRowCount()
*/
int CPL_STDCALL
GDALRATGetRowCount( GDALRasterAttributeTableH hRAT )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetRowCount", 0 );
return ((GDALRasterAttributeTable *) hRAT)->GetRowCount();
}
/************************************************************************/
/* GetValueAsString() */
/************************************************************************/
const char *
GDALDefaultRasterAttributeTable::GetValueAsString( int iRow, int iField ) const
{
if( iField < 0 || iField >= (int) aoFields.size() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iField (%d) out of range.", iField );
return "";
}
if( iRow < 0 || iRow >= nRowCount )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iRow (%d) out of range.", iRow );
return "";
}
switch( aoFields[iField].eType )
{
case GFT_Integer:
{
((GDALDefaultRasterAttributeTable *) this)->
osWorkingResult.Printf( "%d", aoFields[iField].anValues[iRow] );
return osWorkingResult;
}
case GFT_Real:
{
((GDALDefaultRasterAttributeTable *) this)->
osWorkingResult.Printf( "%.16g", aoFields[iField].adfValues[iRow]);
return osWorkingResult;
}
case GFT_String:
{
return aoFields[iField].aosValues[iRow];
}
}
return "";
}
/************************************************************************/
/* GDALRATGetValueAsString() */
/************************************************************************/
/**
* \brief Fetch field value as a string.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetValueAsString()
*/
const char * CPL_STDCALL
GDALRATGetValueAsString( GDALRasterAttributeTableH hRAT, int iRow, int iField )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetValueAsString", NULL );
return ((GDALRasterAttributeTable *) hRAT)->GetValueAsString(iRow, iField);
}
/************************************************************************/
/* GetValueAsInt() */
/************************************************************************/
int
GDALDefaultRasterAttributeTable::GetValueAsInt( int iRow, int iField ) const
{
if( iField < 0 || iField >= (int) aoFields.size() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iField (%d) out of range.", iField );
return 0;
}
if( iRow < 0 || iRow >= nRowCount )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iRow (%d) out of range.", iRow );
return 0;
}
switch( aoFields[iField].eType )
{
case GFT_Integer:
return aoFields[iField].anValues[iRow];
case GFT_Real:
return (int) aoFields[iField].adfValues[iRow];
case GFT_String:
return atoi( aoFields[iField].aosValues[iRow].c_str() );
}
return 0;
}
/************************************************************************/
/* GDALRATGetValueAsInt() */
/************************************************************************/
/**
* \brief Fetch field value as a integer.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetValueAsInt()
*/
int CPL_STDCALL
GDALRATGetValueAsInt( GDALRasterAttributeTableH hRAT, int iRow, int iField )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetValueAsInt", 0 );
return ((GDALRasterAttributeTable *) hRAT)->GetValueAsInt( iRow, iField );
}
/************************************************************************/
/* GetValueAsDouble() */
/************************************************************************/
double
GDALDefaultRasterAttributeTable::GetValueAsDouble( int iRow, int iField ) const
{
if( iField < 0 || iField >= (int) aoFields.size() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iField (%d) out of range.", iField );
return 0;
}
if( iRow < 0 || iRow >= nRowCount )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iRow (%d) out of range.", iRow );
return 0;
}
switch( aoFields[iField].eType )
{
case GFT_Integer:
return aoFields[iField].anValues[iRow];
case GFT_Real:
return aoFields[iField].adfValues[iRow];
case GFT_String:
return CPLAtof( aoFields[iField].aosValues[iRow].c_str() );
}
return 0;
}
/************************************************************************/
/* GDALRATGetValueAsDouble() */
/************************************************************************/
/**
* \brief Fetch field value as a double.
*
* This function is the same as the C++ method GDALRasterAttributeTable::GetValueAsDouble()
*/
double CPL_STDCALL
GDALRATGetValueAsDouble( GDALRasterAttributeTableH hRAT, int iRow, int iField )
{
VALIDATE_POINTER1( hRAT, "GDALRATGetValueAsDouble", 0 );
return ((GDALRasterAttributeTable *) hRAT)->GetValueAsDouble(iRow,iField);
}
/************************************************************************/
/* SetRowCount() */
/************************************************************************/
void GDALDefaultRasterAttributeTable::SetRowCount( int nNewCount )
{
if( nNewCount == nRowCount )
return;
unsigned int iField;
for( iField = 0; iField < aoFields.size(); iField++ )
{
switch( aoFields[iField].eType )
{
case GFT_Integer:
aoFields[iField].anValues.resize( nNewCount );
break;
case GFT_Real:
aoFields[iField].adfValues.resize( nNewCount );
break;
case GFT_String:
aoFields[iField].aosValues.resize( nNewCount );
break;
}
}
nRowCount = nNewCount;
}
/************************************************************************/
/* SetValue() */
/************************************************************************/
void GDALDefaultRasterAttributeTable::SetValue( int iRow, int iField,
const char *pszValue )
{
if( iField < 0 || iField >= (int) aoFields.size() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iField (%d) out of range.", iField );
return;
}
if( iRow == nRowCount )
SetRowCount( nRowCount+1 );
if( iRow < 0 || iRow >= nRowCount )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iRow (%d) out of range.", iRow );
return;
}
switch( aoFields[iField].eType )
{
case GFT_Integer:
aoFields[iField].anValues[iRow] = atoi(pszValue);
break;
case GFT_Real:
aoFields[iField].adfValues[iRow] = CPLAtof(pszValue);
break;
case GFT_String:
aoFields[iField].aosValues[iRow] = pszValue;
break;
}
}
/************************************************************************/
/* GDALRATSetValueAsString() */
/************************************************************************/
/**
* \brief Set field value from string.
*
* This function is the same as the C++ method GDALRasterAttributeTable::SetValue()
*/
void CPL_STDCALL
GDALRATSetValueAsString( GDALRasterAttributeTableH hRAT, int iRow, int iField,
const char *pszValue )
{
VALIDATE_POINTER0( hRAT, "GDALRATSetValueAsString" );
((GDALRasterAttributeTable *) hRAT)->SetValue( iRow, iField, pszValue );
}
/************************************************************************/
/* SetValue() */
/************************************************************************/
void GDALDefaultRasterAttributeTable::SetValue( int iRow, int iField,
int nValue )
{
if( iField < 0 || iField >= (int) aoFields.size() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iField (%d) out of range.", iField );
return;
}
if( iRow == nRowCount )
SetRowCount( nRowCount+1 );
if( iRow < 0 || iRow >= nRowCount )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iRow (%d) out of range.", iRow );
return;
}
switch( aoFields[iField].eType )
{
case GFT_Integer:
aoFields[iField].anValues[iRow] = nValue;
break;
case GFT_Real:
aoFields[iField].adfValues[iRow] = nValue;
break;
case GFT_String:
{
char szValue[100];
sprintf( szValue, "%d", nValue );
aoFields[iField].aosValues[iRow] = szValue;
}
break;
}
}
/************************************************************************/
/* GDALRATSetValueAsInt() */
/************************************************************************/
/**
* \brief Set field value from integer.
*
* This function is the same as the C++ method GDALRasterAttributeTable::SetValue()
*/
void CPL_STDCALL
GDALRATSetValueAsInt( GDALRasterAttributeTableH hRAT, int iRow, int iField,
int nValue )
{
VALIDATE_POINTER0( hRAT, "GDALRATSetValueAsInt" );
((GDALRasterAttributeTable *) hRAT)->SetValue( iRow, iField, nValue);
}
/************************************************************************/
/* SetValue() */
/************************************************************************/
void GDALDefaultRasterAttributeTable::SetValue( int iRow, int iField,
double dfValue )
{
if( iField < 0 || iField >= (int) aoFields.size() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iField (%d) out of range.", iField );
return;
}
if( iRow == nRowCount )
SetRowCount( nRowCount+1 );
if( iRow < 0 || iRow >= nRowCount )
{
CPLError( CE_Failure, CPLE_AppDefined,
"iRow (%d) out of range.", iRow );
return;
}
switch( aoFields[iField].eType )
{
case GFT_Integer:
aoFields[iField].anValues[iRow] = (int) dfValue;
break;
case GFT_Real:
aoFields[iField].adfValues[iRow] = dfValue;
break;
case GFT_String:
{
char szValue[100];
CPLsprintf( szValue, "%.15g", dfValue );
aoFields[iField].aosValues[iRow] = szValue;
}
break;
}
}
/************************************************************************/
/* GDALRATSetValueAsDouble() */
/************************************************************************/
/**
* \brief Set field value from double.
*
* This function is the same as the C++ method GDALRasterAttributeTable::SetValue()
*/
void CPL_STDCALL
GDALRATSetValueAsDouble( GDALRasterAttributeTableH hRAT, int iRow, int iField,
double dfValue )
{
VALIDATE_POINTER0( hRAT, "GDALRATSetValueAsDouble" );
((GDALRasterAttributeTable *) hRAT)->SetValue( iRow, iField, dfValue );
}
/************************************************************************/
/* ChangesAreWrittenToFile() */
/************************************************************************/
int GDALDefaultRasterAttributeTable::ChangesAreWrittenToFile()
{
// GDALRasterBand.SetDefaultRAT needs to be called on instances of
// GDALDefaultRasterAttributeTable since changes are just in-memory
return FALSE;
}
/************************************************************************/
/* GDALRATChangesAreWrittenToFile() */
/************************************************************************/
/**
* \brief Determine whether changes made to this RAT are reflected directly in the dataset
*
* This function is the same as the C++ method GDALRasterAttributeTable::ChangesAreWrittenToFile()
*/
int CPL_STDCALL
GDALRATChangesAreWrittenToFile( GDALRasterAttributeTableH hRAT )
{
VALIDATE_POINTER1( hRAT, "GDALRATChangesAreWrittenToFile", FALSE );
return ((GDALRasterAttributeTable *) hRAT)->ChangesAreWrittenToFile();
}
/************************************************************************/
/* GetRowOfValue() */
/************************************************************************/
int GDALDefaultRasterAttributeTable::GetRowOfValue( double dfValue ) const
{
/* -------------------------------------------------------------------- */
/* Handle case of regular binning. */
/* -------------------------------------------------------------------- */
if( bLinearBinning )
{
int iBin = (int) floor((dfValue - dfRow0Min) / dfBinSize);
if( iBin < 0 || iBin >= nRowCount )
return -1;
else
return iBin;
}
/* -------------------------------------------------------------------- */
/* Do we have any information? */
/* -------------------------------------------------------------------- */
const GDALRasterAttributeField *poMin, *poMax;
if( !bColumnsAnalysed )
((GDALDefaultRasterAttributeTable *) this)->AnalyseColumns();
if( nMinCol == -1 && nMaxCol == -1 )
return -1;
if( nMinCol != -1 )
poMin = &(aoFields[nMinCol]);
else
poMin = NULL;
if( nMaxCol != -1 )
poMax = &(aoFields[nMaxCol]);
else
poMax = NULL;
/* -------------------------------------------------------------------- */
/* Search through rows for match. */
/* -------------------------------------------------------------------- */
int iRow;
for( iRow = 0; iRow < nRowCount; iRow++ )
{
if( poMin != NULL )
{
if( poMin->eType == GFT_Integer )
{
while( iRow < nRowCount && dfValue < poMin->anValues[iRow] )
iRow++;
}
else if( poMin->eType == GFT_Real )
{
while( iRow < nRowCount && dfValue < poMin->adfValues[iRow] )
iRow++;
}
if( iRow == nRowCount )
break;
}
if( poMax != NULL )
{
if( (poMax->eType == GFT_Integer
&& dfValue > poMax->anValues[iRow] )
|| (poMax->eType == GFT_Real
&& dfValue > poMax->adfValues[iRow] ) )
continue;
}
return iRow;
}
return -1;
}
/************************************************************************/
/* GetRowOfValue() */
/* */
/* Int arg for now just converted to double. Perhaps we will */
/* handle this in a special way some day? */
/************************************************************************/
int GDALDefaultRasterAttributeTable::GetRowOfValue( int nValue ) const
{
return GetRowOfValue( (double) nValue );
}
/************************************************************************/
/* SetLinearBinning() */
/************************************************************************/
CPLErr GDALDefaultRasterAttributeTable::SetLinearBinning( double dfRow0MinIn,
double dfBinSizeIn )
{
bLinearBinning = TRUE;
dfRow0Min = dfRow0MinIn;
dfBinSize = dfBinSizeIn;
return CE_None;
}
/************************************************************************/
/* GetLinearBinning() */
/************************************************************************/
int GDALDefaultRasterAttributeTable::GetLinearBinning( double *pdfRow0Min,
double *pdfBinSize ) const
{
if( !bLinearBinning )
return FALSE;
*pdfRow0Min = dfRow0Min;
*pdfBinSize = dfBinSize;
return TRUE;
}
/************************************************************************/
/* CreateColumn() */
/************************************************************************/
CPLErr GDALDefaultRasterAttributeTable::CreateColumn( const char *pszFieldName,
GDALRATFieldType eFieldType,
GDALRATFieldUsage eFieldUsage )
{
int iNewField = aoFields.size();
aoFields.resize( iNewField+1 );
aoFields[iNewField].sName = pszFieldName;
// color columns should be int 0..255
if( ( eFieldUsage == GFU_Red ) || ( eFieldUsage == GFU_Green ) ||
( eFieldUsage == GFU_Blue ) || ( eFieldUsage == GFU_Alpha ) )
{
eFieldType = GFT_Integer;
}
aoFields[iNewField].eType = eFieldType;
aoFields[iNewField].eUsage = eFieldUsage;
if( eFieldType == GFT_Integer )
aoFields[iNewField].anValues.resize( nRowCount );
else if( eFieldType == GFT_Real )
aoFields[iNewField].adfValues.resize( nRowCount );
else if( eFieldType == GFT_String )
aoFields[iNewField].aosValues.resize( nRowCount );
return CE_None;
}
/************************************************************************/
/* Clone() */
/************************************************************************/
GDALDefaultRasterAttributeTable *GDALDefaultRasterAttributeTable::Clone() const
{
return new GDALDefaultRasterAttributeTable( *this );
}
/************************************************************************/
/* GDALRATClone() */
/************************************************************************/
/**
* \brief Copy Raster Attribute Table
*
* This function is the same as the C++ method GDALRasterAttributeTable::Clone()
*/
GDALRasterAttributeTableH CPL_STDCALL
GDALRATClone( GDALRasterAttributeTableH hRAT )
{
VALIDATE_POINTER1( hRAT, "GDALRATClone", NULL );
return ((GDALRasterAttributeTable *) hRAT)->Clone();
}
/************************************************************************/
/* GDALRATSerializeJSON() */
/************************************************************************/
/**
* \brief Serialize Raster Attribute Table in Json format
*
* This function is the same as the C++ method GDALRasterAttributeTable::SerializeJSON()
*/
void* CPL_STDCALL
GDALRATSerializeJSON( GDALRasterAttributeTableH hRAT )
{
VALIDATE_POINTER1( hRAT, "GDALRATSerializeJSON", NULL );
return ((GDALRasterAttributeTable *) hRAT)->SerializeJSON();
}
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