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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.
GDALRasterBand *poBand = poDS->GetRasterBand(panBandList[0]);
if (poBand == nullptr)
return CE_Failure;
/* -------------------------------------------------------------------- */
/* Options */
/* -------------------------------------------------------------------- */
int bAllTouched = FALSE;
GDALBurnValueSrc eBurnValueSource = GBV_UserBurnValue;
GDALRasterMergeAlg eMergeAlg = GRMA_Replace;
GDALRasterizeOptim eOptim = GRO_Auto;
if (GDALRasterizeOptions(papszOptions, &bAllTouched, &eBurnValueSource,
&eMergeAlg, &eOptim) == CE_Failure)
{
return CE_Failure;
}
/* -------------------------------------------------------------------- */
/* If we have no transformer, assume the geometries are in file */
/* georeferenced coordinates, and create a transformer to */
/* convert that to pixel/line coordinates. */
/* */
/* We really just need to apply an affine transform, but for */
/* simplicity we use the more general GenImgProjTransformer. */
/* -------------------------------------------------------------------- */
bool bNeedToFreeTransformer = false;
if (pfnTransformer == nullptr)
{
bNeedToFreeTransformer = true;
char **papszTransformerOptions = nullptr;
double adfGeoTransform[6] = {0.0};
if (poDS->GetGeoTransform(adfGeoTransform) != CE_None &&
poDS->GetGCPCount() == 0 && poDS->GetMetadata("RPC") == nullptr)
{
papszTransformerOptions = CSLSetNameValue(
papszTransformerOptions, "DST_METHOD", "NO_GEOTRANSFORM");
}
pTransformArg = GDALCreateGenImgProjTransformer2(
nullptr, hDS, papszTransformerOptions);
CSLDestroy(papszTransformerOptions);
pfnTransformer = GDALGenImgProjTransform;
if (pTransformArg == nullptr)
{
return CE_Failure;
}
}
/* -------------------------------------------------------------------- */
/* Choice of optimisation in auto mode. Use vector optim : */
/* 1) if output is tiled */
/* 2) if large number of features is present (>10000) */
/* 3) if the nb of pixels > 50 * nb of features (not-too-small ft) */
/* -------------------------------------------------------------------- */