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gdalrasterize.cpp
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/******************************************************************************
*
* Project: GDAL
* Purpose: Vector rasterization.
* Author: Frank Warmerdam, [email protected]
*
******************************************************************************
* Copyright (c) 2005, Frank Warmerdam <[email protected]>
* Copyright (c) 2008-2013, Even Rouault <even dot rouault at spatialys.com>
*
* 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 "cpl_port.h"
#include "gdal_alg.h"
#include "gdal_alg_priv.h"
#include <climits>
#include <cstddef>
#include <cstdlib>
#include <cstring>
#include <cfloat>
#include <limits>
#include <vector>
#include <algorithm>
#include "cpl_conv.h"
#include "cpl_error.h"
#include "cpl_progress.h"
#include "cpl_string.h"
#include "cpl_vsi.h"
#include "gdal.h"
#include "gdal_priv.h"
#include "gdal_priv_templates.hpp"
#include "ogr_api.h"
#include "ogr_core.h"
#include "ogr_feature.h"
#include "ogr_geometry.h"
#include "ogr_spatialref.h"
#include "ogrsf_frmts.h"
CPL_CVSID("$Id$")
template<typename T>
static inline T SaturatedAddSigned(T a, T b)
{
if( a > 0 && b > 0 && a > std::numeric_limits<T>::max() - b )
{
return std::numeric_limits<T>::max();
}
else if( a < 0 && b < 0 && a < std::numeric_limits<T>::min() - b )
{
return std::numeric_limits<T>::min();
}
else
{
return a + b;
}
}
/************************************************************************/
/* gvBurnScanlineBasic() */
/************************************************************************/
template<typename T>
static inline
void gvBurnScanlineBasic( GDALRasterizeInfo *psInfo,
int nY, int nXStart, int nXEnd,
double dfVariant )
{
for( int iBand = 0; iBand < psInfo->nBands; iBand++ )
{
const double burnValue = ( psInfo->burnValues.double_values[iBand] +
( (psInfo->eBurnValueSource == GBV_UserBurnValue)?
0 : dfVariant ) );
unsigned char *pabyInsert = psInfo->pabyChunkBuf
+ iBand * psInfo->nBandSpace
+ nY * psInfo->nLineSpace + nXStart * psInfo->nPixelSpace;
int nPixels = nXEnd - nXStart + 1;
if( psInfo->eMergeAlg == GRMA_Add ) {
while( nPixels-- > 0 )
{
double dfVal = static_cast<double>(*reinterpret_cast<T*>(pabyInsert)) + burnValue;
GDALCopyWord(dfVal, *reinterpret_cast<T*>(pabyInsert));
pabyInsert += psInfo->nPixelSpace;
}
} else {
T nVal;
GDALCopyWord(burnValue, nVal);
while( nPixels-- > 0 )
{
*reinterpret_cast<T*>(pabyInsert) = nVal;
pabyInsert += psInfo->nPixelSpace;
}
}
}
}
static inline
void gvBurnScanlineInt64UserBurnValue( GDALRasterizeInfo *psInfo,
int nY, int nXStart, int nXEnd )
{
for( int iBand = 0; iBand < psInfo->nBands; iBand++ )
{
const std::int64_t burnValue = psInfo->burnValues.int64_values[iBand];
unsigned char *pabyInsert = psInfo->pabyChunkBuf
+ iBand * psInfo->nBandSpace
+ nY * psInfo->nLineSpace + nXStart * psInfo->nPixelSpace;
int nPixels = nXEnd - nXStart + 1;
if( psInfo->eMergeAlg == GRMA_Add ) {
while( nPixels-- > 0 )
{
*reinterpret_cast<std::int64_t*>(pabyInsert) = SaturatedAddSigned(
*reinterpret_cast<std::int64_t*>(pabyInsert), burnValue);
pabyInsert += psInfo->nPixelSpace;
}
} else {
while( nPixels-- > 0 )
{
*reinterpret_cast<std::int64_t*>(pabyInsert) = burnValue;
pabyInsert += psInfo->nPixelSpace;
}
}
}
}
/************************************************************************/
/* gvBurnScanline() */
/************************************************************************/
static
void gvBurnScanline( void *pCBData, int nY, int nXStart, int nXEnd,
double dfVariant )
{
GDALRasterizeInfo *psInfo = static_cast<GDALRasterizeInfo *>(pCBData);
if( nXStart > nXEnd )
return;
CPLAssert( nY >= 0 && nY < psInfo->nYSize );
CPLAssert( nXStart < psInfo->nXSize );
CPLAssert( nXEnd >= 0 );
if( nXStart < 0 )
nXStart = 0;
if( nXEnd >= psInfo->nXSize )
nXEnd = psInfo->nXSize - 1;
if( psInfo->eBurnValueType == GDT_Int64 )
{
if( psInfo->eType == GDT_Int64 && psInfo->eBurnValueSource == GBV_UserBurnValue )
{
gvBurnScanlineInt64UserBurnValue( psInfo, nY, nXStart, nXEnd );
}
else
{
CPLAssert(false);
}
return;
}
switch (psInfo->eType)
{
case GDT_Byte:
gvBurnScanlineBasic<GByte>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_Int8:
gvBurnScanlineBasic<GInt8>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_Int16:
gvBurnScanlineBasic<GInt16>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_UInt16:
gvBurnScanlineBasic<GUInt16>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_Int32:
gvBurnScanlineBasic<GInt32>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_UInt32:
gvBurnScanlineBasic<GUInt32>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_Int64:
gvBurnScanlineBasic<std::int64_t>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_UInt64:
gvBurnScanlineBasic<std::uint64_t>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_Float32:
gvBurnScanlineBasic<float>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_Float64:
gvBurnScanlineBasic<double>( psInfo, nY, nXStart, nXEnd, dfVariant );
break;
case GDT_CInt16:
case GDT_CInt32:
case GDT_CFloat32:
case GDT_CFloat64:
case GDT_Unknown:
case GDT_TypeCount:
CPLAssert(false);
break;
}
}
/************************************************************************/
/* gvBurnPointBasic() */
/************************************************************************/
template<typename T>
static inline
void gvBurnPointBasic( GDALRasterizeInfo *psInfo,
int nY, int nX, double dfVariant )
{
for( int iBand = 0; iBand < psInfo->nBands; iBand++ )
{
double burnValue = ( psInfo->burnValues.double_values[iBand] +
( (psInfo->eBurnValueSource == GBV_UserBurnValue)?
0 : dfVariant ) );
unsigned char *pbyInsert = psInfo->pabyChunkBuf
+ iBand * psInfo->nBandSpace
+ nY * psInfo->nLineSpace + nX * psInfo->nPixelSpace;
T* pbyPixel = reinterpret_cast<T*>(pbyInsert);
if( psInfo->eMergeAlg == GRMA_Add )
burnValue += static_cast<double>(*pbyPixel);
GDALCopyWord(burnValue, *pbyPixel);
}
}
static inline
void gvBurnPointInt64UserBurnValue( GDALRasterizeInfo *psInfo,
int nY, int nX )
{
for( int iBand = 0; iBand < psInfo->nBands; iBand++ )
{
std::int64_t burnValue = psInfo->burnValues.int64_values[iBand];
unsigned char *pbyInsert = psInfo->pabyChunkBuf
+ iBand * psInfo->nBandSpace
+ nY * psInfo->nLineSpace + nX * psInfo->nPixelSpace;
std::int64_t* pbyPixel = reinterpret_cast<std::int64_t*>(pbyInsert);
if( psInfo->eMergeAlg == GRMA_Add )
{
burnValue = SaturatedAddSigned(burnValue, *pbyPixel);
}
*pbyPixel = burnValue;
}
}
/************************************************************************/
/* gvBurnPoint() */
/************************************************************************/
static
void gvBurnPoint( void *pCBData, int nY, int nX, double dfVariant )
{
GDALRasterizeInfo *psInfo = static_cast<GDALRasterizeInfo *>(pCBData);
CPLAssert( nY >= 0 && nY < psInfo->nYSize );
CPLAssert( nX >= 0 && nX < psInfo->nXSize );
if( psInfo->eBurnValueType == GDT_Int64 )
{
if( psInfo->eType == GDT_Int64 && psInfo->eBurnValueSource == GBV_UserBurnValue )
{
gvBurnPointInt64UserBurnValue( psInfo, nY, nX );
}
else
{
CPLAssert(false);
}
return;
}
switch( psInfo->eType )
{
case GDT_Byte:
gvBurnPointBasic<GByte>( psInfo, nY, nX, dfVariant );
break;
case GDT_Int8:
gvBurnPointBasic<GInt8>( psInfo, nY, nX, dfVariant );
break;
case GDT_Int16:
gvBurnPointBasic<GInt16>( psInfo, nY, nX, dfVariant );
break;
case GDT_UInt16:
gvBurnPointBasic<GUInt16>( psInfo, nY, nX, dfVariant );
break;
case GDT_Int32:
gvBurnPointBasic<GInt32>( psInfo, nY, nX, dfVariant );
break;
case GDT_UInt32:
gvBurnPointBasic<GUInt32>( psInfo, nY, nX, dfVariant );
break;
case GDT_Int64:
gvBurnPointBasic<std::int64_t>( psInfo, nY, nX, dfVariant );
break;
case GDT_UInt64:
gvBurnPointBasic<std::uint64_t>( psInfo, nY, nX, dfVariant );
break;
case GDT_Float32:
gvBurnPointBasic<float>( psInfo, nY, nX, dfVariant );
break;
case GDT_Float64:
gvBurnPointBasic<double>( psInfo, nY, nX, dfVariant );
break;
case GDT_CInt16:
case GDT_CInt32:
case GDT_CFloat32:
case GDT_CFloat64:
case GDT_Unknown:
case GDT_TypeCount:
CPLAssert(false);
}
}
/************************************************************************/
/* GDALCollectRingsFromGeometry() */
/************************************************************************/
static void GDALCollectRingsFromGeometry(
const OGRGeometry *poShape,
std::vector<double> &aPointX, std::vector<double> &aPointY,
std::vector<double> &aPointVariant,
std::vector<int> &aPartSize, GDALBurnValueSrc eBurnValueSrc)
{
if( poShape == nullptr || poShape->IsEmpty() )
return;
const OGRwkbGeometryType eFlatType = wkbFlatten(poShape->getGeometryType());
if( eFlatType == wkbPoint )
{
const auto poPoint = poShape->toPoint();
aPointX.push_back( poPoint->getX() );
aPointY.push_back( poPoint->getY() );
aPartSize.push_back( 1 );
if( eBurnValueSrc != GBV_UserBurnValue )
{
// TODO(schwehr): Why not have the option for M r18164?
// switch( eBurnValueSrc )
// {
// case GBV_Z:*/
aPointVariant.push_back( poPoint->getZ() );
// break;
// case GBV_M:
// aPointVariant.reserve( nNewCount );
// aPointVariant.push_back( poPoint->getM() );
}
}
else if( EQUAL(poShape->getGeometryName(), "LINEARRING") )
{
const auto poRing = poShape->toLinearRing();
const int nCount = poRing->getNumPoints();
const size_t nNewCount = aPointX.size() + static_cast<size_t>(nCount);
aPointX.reserve( nNewCount );
aPointY.reserve( nNewCount );
if( eBurnValueSrc != GBV_UserBurnValue )
aPointVariant.reserve( nNewCount );
if( poRing->isClockwise() )
{
for( int i = 0; i < nCount; i++ )
{
aPointX.push_back( poRing->getX(i) );
aPointY.push_back( poRing->getY(i) );
if( eBurnValueSrc != GBV_UserBurnValue )
{
/*switch( eBurnValueSrc )
{
case GBV_Z:*/
aPointVariant.push_back( poRing->getZ(i) );
/*break;
case GBV_M:
aPointVariant.push_back( poRing->getM(i) );
}*/
}
}
}
else
{
for( int i = nCount - 1; i >= 0; i-- )
{
aPointX.push_back( poRing->getX(i) );
aPointY.push_back( poRing->getY(i) );
if( eBurnValueSrc != GBV_UserBurnValue )
{
/*switch( eBurnValueSrc )
{
case GBV_Z:*/
aPointVariant.push_back( poRing->getZ(i) );
/*break;
case GBV_M:
aPointVariant.push_back( poRing->getM(i) );
}*/
}
}
}
aPartSize.push_back( nCount );
}
else if( eFlatType == wkbLineString )
{
const auto poLine = poShape->toLineString();
const int nCount = poLine->getNumPoints();
const size_t nNewCount = aPointX.size() + static_cast<size_t>(nCount);
aPointX.reserve( nNewCount );
aPointY.reserve( nNewCount );
if( eBurnValueSrc != GBV_UserBurnValue )
aPointVariant.reserve( nNewCount );
for( int i = nCount - 1; i >= 0; i-- )
{
aPointX.push_back( poLine->getX(i) );
aPointY.push_back( poLine->getY(i) );
if( eBurnValueSrc != GBV_UserBurnValue )
{
/*switch( eBurnValueSrc )
{
case GBV_Z:*/
aPointVariant.push_back( poLine->getZ(i) );
/*break;
case GBV_M:
aPointVariant.push_back( poLine->getM(i) );
}*/
}
}
aPartSize.push_back( nCount );
}
else if( eFlatType == wkbPolygon )
{
const auto poPolygon = poShape->toPolygon();
GDALCollectRingsFromGeometry( poPolygon->getExteriorRing(),
aPointX, aPointY, aPointVariant,
aPartSize, eBurnValueSrc );
for( int i = 0; i < poPolygon->getNumInteriorRings(); i++ )
GDALCollectRingsFromGeometry( poPolygon->getInteriorRing(i),
aPointX, aPointY, aPointVariant,
aPartSize, eBurnValueSrc );
}
else if( eFlatType == wkbMultiPoint
|| eFlatType == wkbMultiLineString
|| eFlatType == wkbMultiPolygon
|| eFlatType == wkbGeometryCollection )
{
const auto poGC = poShape->toGeometryCollection();
for( int i = 0; i < poGC->getNumGeometries(); i++ )
GDALCollectRingsFromGeometry( poGC->getGeometryRef(i),
aPointX, aPointY, aPointVariant,
aPartSize, eBurnValueSrc );
}
else
{
CPLDebug( "GDAL", "Rasterizer ignoring non-polygonal geometry." );
}
}
/************************************************************************/
/* gv_rasterize_one_shape() */
/************************************************************************/
static void
gv_rasterize_one_shape( unsigned char *pabyChunkBuf, int nXOff, int nYOff,
int nXSize, int nYSize,
int nBands, GDALDataType eType,
int nPixelSpace, GSpacing nLineSpace, GSpacing nBandSpace,
int bAllTouched,
const OGRGeometry *poShape,
GDALDataType eBurnValueType,
const double *padfBurnValues,
const int64_t *panBurnValues,
GDALBurnValueSrc eBurnValueSrc,
GDALRasterMergeAlg eMergeAlg,
GDALTransformerFunc pfnTransformer,
void *pTransformArg )
{
if( poShape == nullptr || poShape->IsEmpty() )
return;
const auto eGeomType = wkbFlatten(poShape->getGeometryType());
if( (eGeomType == wkbMultiLineString ||
eGeomType == wkbMultiPolygon ||
eGeomType == wkbGeometryCollection) &&
eMergeAlg == GRMA_Replace )
{
// Speed optimization: in replace mode, we can rasterize each part of
// a geometry collection separately.
const auto poGC = poShape->toGeometryCollection();
for( const auto poPart: *poGC )
{
gv_rasterize_one_shape(pabyChunkBuf, nXOff, nYOff,
nXSize, nYSize,
nBands, eType,
nPixelSpace, nLineSpace, nBandSpace,
bAllTouched,
poPart,
eBurnValueType,
padfBurnValues,
panBurnValues,
eBurnValueSrc,
eMergeAlg,
pfnTransformer,
pTransformArg);
}
return;
}
if(nPixelSpace == 0)
{
nPixelSpace = GDALGetDataTypeSizeBytes(eType);
}
if(nLineSpace == 0)
{
nLineSpace = static_cast<GSpacing>(nXSize) * nPixelSpace;
}
if(nBandSpace == 0)
{
nBandSpace = nYSize * nLineSpace;
}
GDALRasterizeInfo sInfo;
sInfo.nXSize = nXSize;
sInfo.nYSize = nYSize;
sInfo.nBands = nBands;
sInfo.pabyChunkBuf = pabyChunkBuf;
sInfo.eType = eType;
sInfo.nPixelSpace = nPixelSpace;
sInfo.nLineSpace = nLineSpace;
sInfo.nBandSpace = nBandSpace;
sInfo.eBurnValueType = eBurnValueType;
if( eBurnValueType == GDT_Float64 )
sInfo.burnValues.double_values = padfBurnValues;
else if( eBurnValueType == GDT_Int64 )
sInfo.burnValues.int64_values = panBurnValues;
else
{
CPLAssert(false);
}
sInfo.eBurnValueSource = eBurnValueSrc;
sInfo.eMergeAlg = eMergeAlg;
/* -------------------------------------------------------------------- */
/* Transform polygon geometries into a set of rings and a part */
/* size list. */
/* -------------------------------------------------------------------- */
std::vector<double> aPointX;
std::vector<double> aPointY;
std::vector<double> aPointVariant;
std::vector<int> aPartSize;
GDALCollectRingsFromGeometry( poShape, aPointX, aPointY, aPointVariant,
aPartSize, eBurnValueSrc );
/* -------------------------------------------------------------------- */
/* Transform points if needed. */
/* -------------------------------------------------------------------- */
if( pfnTransformer != nullptr )
{
int *panSuccess =
static_cast<int *>(CPLCalloc(sizeof(int), aPointX.size()));
// TODO: We need to add all appropriate error checking at some point.
pfnTransformer( pTransformArg, FALSE, static_cast<int>(aPointX.size()),
aPointX.data(), aPointY.data(), nullptr, panSuccess );
CPLFree( panSuccess );
}
/* -------------------------------------------------------------------- */
/* Shift to account for the buffer offset of this buffer. */
/* -------------------------------------------------------------------- */
for( unsigned int i = 0; i < aPointX.size(); i++ )
aPointX[i] -= nXOff;
for( unsigned int i = 0; i < aPointY.size(); i++ )
aPointY[i] -= nYOff;
/* -------------------------------------------------------------------- */
/* Perform the rasterization. */
/* According to the C++ Standard/23.2.4, elements of a vector are */
/* stored in continuous memory block. */
/* -------------------------------------------------------------------- */
switch( eGeomType )
{
case wkbPoint:
case wkbMultiPoint:
GDALdllImagePoint( sInfo.nXSize, nYSize,
static_cast<int>(aPartSize.size()), aPartSize.data(),
aPointX.data(), aPointY.data(),
(eBurnValueSrc == GBV_UserBurnValue)?
nullptr : aPointVariant.data(),
gvBurnPoint, &sInfo );
break;
case wkbLineString:
case wkbMultiLineString:
{
if( bAllTouched )
GDALdllImageLineAllTouched( sInfo.nXSize, nYSize,
static_cast<int>(aPartSize.size()),
aPartSize.data(),
aPointX.data(), aPointY.data(),
(eBurnValueSrc == GBV_UserBurnValue)?
nullptr : aPointVariant.data(),
gvBurnPoint, &sInfo,
eMergeAlg == GRMA_Add,
false);
else
GDALdllImageLine( sInfo.nXSize, nYSize,
static_cast<int>(aPartSize.size()),
aPartSize.data(),
aPointX.data(), aPointY.data(),
(eBurnValueSrc == GBV_UserBurnValue)?
nullptr : aPointVariant.data(),
gvBurnPoint, &sInfo );
}
break;
default:
{
GDALdllImageFilledPolygon(
sInfo.nXSize, nYSize,
static_cast<int>(aPartSize.size()), aPartSize.data(),
aPointX.data(), aPointY.data(),
(eBurnValueSrc == GBV_UserBurnValue)?
nullptr : aPointVariant.data(),
gvBurnScanline, &sInfo );
if( bAllTouched )
{
// Reverting the variants to the first value because the
// polygon is filled using the variant from the first point of
// the first segment. Should be removed when the code to full
// polygons more appropriately is added.
if( eBurnValueSrc == GBV_UserBurnValue )
{
GDALdllImageLineAllTouched(
sInfo.nXSize, nYSize,
static_cast<int>(aPartSize.size()), aPartSize.data(),
aPointX.data(), aPointY.data(),
nullptr,
gvBurnPoint, &sInfo,
eMergeAlg == GRMA_Add,
true );
}
else
{
for( unsigned int i = 0, n = 0;
i < static_cast<unsigned int>(aPartSize.size());
i++ )
{
for( int j = 0; j < aPartSize[i]; j++ )
aPointVariant[n++] = aPointVariant[0];
}
GDALdllImageLineAllTouched(
sInfo.nXSize, nYSize,
static_cast<int>(aPartSize.size()), aPartSize.data(),
aPointX.data(), aPointY.data(),
aPointVariant.data(),
gvBurnPoint, &sInfo,
eMergeAlg == GRMA_Add,
true );
}
}
}
break;
}
}
/************************************************************************/
/* GDALRasterizeOptions() */
/* */
/* Recognise a few rasterize options used by all three entry */
/* points. */
/************************************************************************/
static CPLErr GDALRasterizeOptions( CSLConstList papszOptions,
int *pbAllTouched,
GDALBurnValueSrc *peBurnValueSource,
GDALRasterMergeAlg *peMergeAlg,
GDALRasterizeOptim *peOptim)
{
*pbAllTouched = CPLFetchBool( papszOptions, "ALL_TOUCHED", false );
const char *pszOpt = CSLFetchNameValue( papszOptions, "BURN_VALUE_FROM" );
*peBurnValueSource = GBV_UserBurnValue;
if( pszOpt )
{
if( EQUAL(pszOpt, "Z"))
{
*peBurnValueSource = GBV_Z;
}
// else if( EQUAL(pszOpt, "M"))
// eBurnValueSource = GBV_M;
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Unrecognized value '%s' for BURN_VALUE_FROM.",
pszOpt );
return CE_Failure;
}
}
/* -------------------------------------------------------------------- */
/* MERGE_ALG=[REPLACE]/ADD */
/* -------------------------------------------------------------------- */
*peMergeAlg = GRMA_Replace;
pszOpt = CSLFetchNameValue( papszOptions, "MERGE_ALG" );
if( pszOpt )
{
if( EQUAL(pszOpt, "ADD"))
{
*peMergeAlg = GRMA_Add;
}
else if( EQUAL(pszOpt, "REPLACE"))
{
*peMergeAlg = GRMA_Replace;
}
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Unrecognized value '%s' for MERGE_ALG.",
pszOpt );
return CE_Failure;
}
}
/* -------------------------------------------------------------------- */
/* OPTIM=[AUTO]/RASTER/VECTOR */
/* -------------------------------------------------------------------- */
*peOptim = GRO_Auto;
pszOpt = CSLFetchNameValue( papszOptions, "OPTIM" );
if( pszOpt )
{
if( EQUAL(pszOpt, "RASTER"))
{
*peOptim = GRO_Raster;
}
else if( EQUAL(pszOpt, "VECTOR"))
{
*peOptim = GRO_Vector;
}
else if( EQUAL(pszOpt, "AUTO"))
{
*peOptim = GRO_Auto;
}
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Unrecognized value '%s' for OPTIM.",
pszOpt );
return CE_Failure;
}
}
return CE_None;
}
/************************************************************************/
/* GDALRasterizeGeometries() */
/************************************************************************/
static
CPLErr GDALRasterizeGeometriesInternal( GDALDatasetH hDS,
int nBandCount, const int *panBandList,
int nGeomCount, const OGRGeometryH *pahGeometries,
GDALTransformerFunc pfnTransformer,
void *pTransformArg,
GDALDataType eBurnValueType,
const double *padfGeomBurnValues,
const int64_t* panGeomBurnValues,
CSLConstList papszOptions,
GDALProgressFunc pfnProgress,
void *pProgressArg );
/**
* Burn geometries into raster.
*
* Rasterize a list of geometric objects into a raster dataset. The
* geometries are passed as an array of OGRGeometryH handlers.
*
* If the geometries are in the georeferenced coordinates of the raster
* dataset, then the pfnTransform may be passed in NULL and one will be
* derived internally from the geotransform of the dataset. The transform
* needs to transform the geometry locations into pixel/line coordinates
* on the raster dataset.
*
* The output raster may be of any GDAL supported datatype. An explicit list
* of burn values for each geometry for each band must be passed in.
*
* The papszOption list of options currently only supports one option. The
* "ALL_TOUCHED" option may be enabled by setting it to "TRUE".
*
* @param hDS output data, must be opened in update mode.
* @param nBandCount the number of bands to be updated.
* @param panBandList the list of bands to be updated.
* @param nGeomCount the number of geometries being passed in pahGeometries.
* @param pahGeometries the array of geometries to burn in.
* @param pfnTransformer transformation to apply to geometries to put into
* pixel/line coordinates on raster. If NULL a geotransform based one will
* be created internally.
* @param pTransformArg callback data for transformer.
* @param padfGeomBurnValues the array of values to burn into the raster.
* There should be nBandCount values for each geometry.
* @param papszOptions special options controlling rasterization
* <ul>
* <li>"ALL_TOUCHED": May be set to TRUE to set all pixels touched
* by the line or polygons, not just those whose center is within the polygon
* or that are selected by brezenhams line algorithm. Defaults to FALSE.</li>
* <li>"BURN_VALUE_FROM": May be set to "Z" to use the Z values of the
* geometries. dfBurnValue is added to this before burning.
* Defaults to GDALBurnValueSrc.GBV_UserBurnValue in which case just the
* dfBurnValue is burned. This is implemented only for points and lines for
* now. The M value may be supported in the future.</li>
* <li>"MERGE_ALG": May be REPLACE (the default) or ADD. REPLACE results in
* overwriting of value, while ADD adds the new value to the existing raster,
* suitable for heatmaps for instance.</li>
* <li>"CHUNKYSIZE": The height in lines of the chunk to operate on.
* The larger the chunk size the less times we need to make a pass through all
* the shapes. If it is not set or set to zero the default chunk size will be
* used. Default size will be estimated based on the GDAL cache buffer size
* using formula: cache_size_bytes/scanline_size_bytes, so the chunk will
* not exceed the cache. Not used in OPTIM=RASTER mode.</li>
* </ul>
* @param pfnProgress the progress function to report completion.
* @param pProgressArg callback data for progress function.
*
* @return CE_None on success or CE_Failure on error.
*
* <strong>Example</strong><br>
* GDALRasterizeGeometries rasterize output to MEM Dataset :<br>
* @code
* int nBufXSize = 1024;
* int nBufYSize = 1024;
* int nBandCount = 1;
* GDALDataType eType = GDT_Byte;
* int nDataTypeSize = GDALGetDataTypeSizeBytes(eType);
*
* void* pData = CPLCalloc( nBufXSize*nBufYSize*nBandCount, nDataTypeSize );
* char memdsetpath[1024];
* sprintf(memdsetpath,"MEM:::DATAPOINTER=0x%p,PIXELS=%d,LINES=%d,"
* "BANDS=%d,DATATYPE=%s,PIXELOFFSET=%d,LINEOFFSET=%d",
* pData,nBufXSize,nBufYSize,nBandCount,GDALGetDataTypeName(eType),
* nBandCount*nDataTypeSize, nBufXSize*nBandCount*nDataTypeSize );
*
* // Open Memory Dataset
* GDALDatasetH hMemDset = GDALOpen(memdsetpath, GA_Update);
* // or create it as follows
* // GDALDriverH hMemDriver = GDALGetDriverByName("MEM");
* // GDALDatasetH hMemDset = GDALCreate(hMemDriver, "", nBufXSize, nBufYSize, nBandCount, eType, NULL);
*
* double adfGeoTransform[6];
* // Assign GeoTransform parameters,Omitted here.
*
* GDALSetGeoTransform(hMemDset,adfGeoTransform);
* GDALSetProjection(hMemDset,pszProjection); // Can not
*
* // Do something ...
* // Need an array of OGRGeometry objects,The assumption here is pahGeoms
*
* int bandList[3] = { 1, 2, 3};
* std::vector<double> geomBurnValue(nGeomCount*nBandCount,255.0);
* CPLErr err = GDALRasterizeGeometries(hMemDset, nBandCount, bandList,
* nGeomCount, pahGeoms, pfnTransformer, pTransformArg,
* geomBurnValue.data(), papszOptions,
* pfnProgress, pProgressArg);
* if( err != CE_None )
* {
* // Do something ...
* }
* GDALClose(hMemDset);
* CPLFree(pData);
*@endcode
*/
CPLErr GDALRasterizeGeometries( GDALDatasetH hDS,
int nBandCount, const int *panBandList,
int nGeomCount, const OGRGeometryH *pahGeometries,
GDALTransformerFunc pfnTransformer,
void *pTransformArg,
const double *padfGeomBurnValues,
CSLConstList papszOptions,
GDALProgressFunc pfnProgress,
void *pProgressArg )
{
VALIDATE_POINTER1( hDS, "GDALRasterizeGeometries", CE_Failure);
return GDALRasterizeGeometriesInternal(hDS,
nBandCount, panBandList,
nGeomCount, pahGeometries,
pfnTransformer,
pTransformArg,
GDT_Float64,
padfGeomBurnValues,
nullptr,
papszOptions,
pfnProgress, pProgressArg);
}
/**
* Burn geometries into raster.
*
* Same as GDALRasterizeGeometries(), except that the burn values array is
* of type Int64. And the datatype of the output raster *must* be GDT_Int64.
*
* @since GDAL 3.5
*/
CPLErr GDALRasterizeGeometriesInt64( GDALDatasetH hDS,
int nBandCount, const int *panBandList,
int nGeomCount, const OGRGeometryH *pahGeometries,
GDALTransformerFunc pfnTransformer,
void *pTransformArg,
const int64_t *panGeomBurnValues,
CSLConstList papszOptions,
GDALProgressFunc pfnProgress,
void *pProgressArg )
{
VALIDATE_POINTER1( hDS, "GDALRasterizeGeometriesInt64", CE_Failure);
return GDALRasterizeGeometriesInternal(hDS,
nBandCount, panBandList,
nGeomCount, pahGeometries,
pfnTransformer,
pTransformArg,
GDT_Int64,
nullptr,
panGeomBurnValues,
papszOptions,
pfnProgress, pProgressArg);
}
static
CPLErr GDALRasterizeGeometriesInternal( GDALDatasetH hDS,
int nBandCount, const int *panBandList,
int nGeomCount, const OGRGeometryH *pahGeometries,
GDALTransformerFunc pfnTransformer,
void *pTransformArg,
GDALDataType eBurnValueType,
const double *padfGeomBurnValues,
const int64_t* panGeomBurnValues,
CSLConstList papszOptions,
GDALProgressFunc pfnProgress,
void *pProgressArg )
{
if( pfnProgress == nullptr )
pfnProgress = GDALDummyProgress;
GDALDataset *poDS = GDALDataset::FromHandle(hDS);
/* -------------------------------------------------------------------- */
/* Do some rudimentary arg checking. */
/* -------------------------------------------------------------------- */
if( nBandCount == 0 || nGeomCount == 0 )
{
pfnProgress(1.0, "", pProgressArg );
return CE_None;
}
if( eBurnValueType == GDT_Int64 )
{
for(int i = 0; i < nBandCount; i++)
{
GDALRasterBand *poBand = poDS->GetRasterBand( panBandList[i] );
if( poBand == nullptr )
return CE_Failure;
if( poBand->GetRasterDataType() != GDT_Int64 )
{
CPLError(CE_Failure, CPLE_NotSupported,
"GDALRasterizeGeometriesInt64() only supported on Int64 raster");
return CE_Failure;
}
}
}
// Prototype band.