/src/gdal/ogr/ogrsf_frmts/generic/ogrwarpedlayer.cpp

Source
/******************************************************************************
 *
 * Project:  OpenGIS Simple Features Reference Implementation
 * Purpose:  Implements OGRWarpedLayer class
 * Author:   Even Rouault, even dot rouault at spatialys.com
 *
 ******************************************************************************
 * Copyright (c) 2012-2014, Even Rouault <even dot rouault at spatialys.com>
 *
 * SPDX-License-Identifier: MIT
 ****************************************************************************/

#ifndef DOXYGEN_SKIP

#include <cmath>

#include "ogrwarpedlayer.h"

/************************************************************************/
/*                          OGRWarpedLayer()                            */
/************************************************************************/

OGRWarpedLayer::OGRWarpedLayer(OGRLayer *poDecoratedLayer, int iGeomField,
                               int bTakeOwnership,
                               OGRCoordinateTransformation *poCT,
                               OGRCoordinateTransformation *poReversedCT)
    : OGRLayerDecorator(poDecoratedLayer, bTakeOwnership),
      m_poFeatureDefn(poDecoratedLayer->GetLayerDefn()->Clone()),
      m_iGeomField(iGeomField), m_poCT(poCT), m_poReversedCT(poReversedCT),
      m_poSRS(const_cast<OGRSpatialReference *>(m_poCT->GetTargetCS()))
{
    CPLAssert(poCT != nullptr);
    SetDescription(poDecoratedLayer->GetDescription());

    m_poFeatureDefn->Reference();
    if (m_poFeatureDefn->GetGeomFieldCount() > 0)
        m_poFeatureDefn->GetGeomFieldDefn(m_iGeomField)->SetSpatialRef(m_poSRS);

    if (m_poSRS != nullptr)
    {
        m_poSRS->Reference();
    }
}

/************************************************************************/
/*                         ~OGRWarpedLayer()                            */
/************************************************************************/

OGRWarpedLayer::~OGRWarpedLayer()
{
    if (m_poFeatureDefn != nullptr)
        m_poFeatureDefn->Release();
    if (m_poSRS != nullptr)
        m_poSRS->Release();
    delete m_poCT;
    delete m_poReversedCT;
}

/************************************************************************/
/*                         ISetSpatialFilter()                          */
/************************************************************************/

OGRErr OGRWarpedLayer::ISetSpatialFilter(int iGeomField,
                                         const OGRGeometry *poGeom)
{

    m_iGeomFieldFilter = iGeomField;
    if (InstallFilter(poGeom))
        ResetReading();

    if (m_iGeomFieldFilter == m_iGeomField)
    {
        if (poGeom == nullptr || m_poReversedCT == nullptr)
        {
            return m_poDecoratedLayer->SetSpatialFilter(m_iGeomFieldFilter,
                                                        nullptr);
        }
        else
        {
            OGREnvelope sEnvelope;
            poGeom->getEnvelope(&sEnvelope);
            if (std::isinf(sEnvelope.MinX) && std::isinf(sEnvelope.MinY) &&
                std::isinf(sEnvelope.MaxX) && std::isinf(sEnvelope.MaxY))
            {
                return m_poDecoratedLayer->SetSpatialFilterRect(
                    m_iGeomFieldFilter, sEnvelope.MinX, sEnvelope.MinY,
                    sEnvelope.MaxX, sEnvelope.MaxY);
            }
            else if (ReprojectEnvelope(&sEnvelope, m_poReversedCT))
            {
                return m_poDecoratedLayer->SetSpatialFilterRect(
                    m_iGeomFieldFilter, sEnvelope.MinX, sEnvelope.MinY,
                    sEnvelope.MaxX, sEnvelope.MaxY);
            }
            else
            {
                return m_poDecoratedLayer->SetSpatialFilter(m_iGeomFieldFilter,
                                                            nullptr);
            }
        }
    }
    else
    {
        return m_poDecoratedLayer->SetSpatialFilter(m_iGeomFieldFilter, poGeom);
    }
}

/************************************************************************/
/*                         TranslateFeature()                           */
/************************************************************************/

void OGRWarpedLayer::TranslateFeature(
    std::unique_ptr<OGRFeature> poSrcFeature,
    std::vector<std::unique_ptr<OGRFeature>> &apoOutFeatures)
{
    apoOutFeatures.push_back(
        SrcFeatureToWarpedFeature(std::move(poSrcFeature)));
}

/************************************************************************/
/*                     SrcFeatureToWarpedFeature()                      */
/************************************************************************/

std::unique_ptr<OGRFeature>
OGRWarpedLayer::SrcFeatureToWarpedFeature(std::unique_ptr<OGRFeature> poFeature)
{
    // This is safe to do here as they have matching attribute and geometry
    // fields
    OGRLayer *poThisLayer = this;
    poFeature->SetFDefnUnsafe(poThisLayer->GetLayerDefn());

    OGRGeometry *poGeom = poFeature->GetGeomFieldRef(m_iGeomField);
    if (poGeom)
    {
        auto poNewGeom = OGRGeometryFactory::transformWithOptions(
            poGeom, m_poCT, nullptr, m_transformCacheForward);
        poFeature->SetGeomFieldDirectly(m_iGeomField, poNewGeom);
    }

    return poFeature;
}

/************************************************************************/
/*                     WarpedFeatureToSrcFeature()                      */
/************************************************************************/

std::unique_ptr<OGRFeature>
OGRWarpedLayer::WarpedFeatureToSrcFeature(std::unique_ptr<OGRFeature> poFeature)
{
    // This is safe to do here as they have matching attribute and geometry
    // fields
    poFeature->SetFDefnUnsafe(m_poDecoratedLayer->GetLayerDefn());

    OGRGeometry *poGeom = poFeature->GetGeomFieldRef(m_iGeomField);
    if (poGeom)
    {
        if (!m_poReversedCT)
            return nullptr;
        auto poNewGeom = OGRGeometryFactory::transformWithOptions(
            poGeom, m_poReversedCT, nullptr, m_transformCacheReverse);
        if (!poNewGeom)
            return nullptr;
        poFeature->SetGeomFieldDirectly(m_iGeomField, poNewGeom);
    }

    return poFeature;
}

/************************************************************************/
/*                          GetNextFeature()                            */
/************************************************************************/

OGRFeature *OGRWarpedLayer::GetNextFeature()
{
    while (true)
    {
        auto poFeature =
            std::unique_ptr<OGRFeature>(m_poDecoratedLayer->GetNextFeature());
        if (!poFeature)
            return nullptr;

        auto poFeatureNew = SrcFeatureToWarpedFeature(std::move(poFeature));
        const OGRGeometry *poGeom = poFeatureNew->GetGeomFieldRef(m_iGeomField);
        if (m_poFilterGeom != nullptr && !FilterGeometry(poGeom))
        {
            continue;
        }

        return poFeatureNew.release();
    }
}

/************************************************************************/
/*                             GetFeature()                             */
/************************************************************************/

OGRFeature *OGRWarpedLayer::GetFeature(GIntBig nFID)
{
    auto poFeature =
        std::unique_ptr<OGRFeature>(m_poDecoratedLayer->GetFeature(nFID));
    if (poFeature)
    {
        poFeature = SrcFeatureToWarpedFeature(std::move(poFeature));
    }
    return poFeature.release();
}

/************************************************************************/
/*                             ISetFeature()                             */
/************************************************************************/

OGRErr OGRWarpedLayer::ISetFeature(OGRFeature *poFeature)
{
    auto poFeatureNew = WarpedFeatureToSrcFeature(
        std::unique_ptr<OGRFeature>(poFeature->Clone()));
    if (!poFeatureNew)
        return OGRERR_FAILURE;

    return m_poDecoratedLayer->SetFeature(poFeatureNew.get());
}

/************************************************************************/
/*                            ICreateFeature()                           */
/************************************************************************/

OGRErr OGRWarpedLayer::ICreateFeature(OGRFeature *poFeature)
{
    auto poFeatureNew = WarpedFeatureToSrcFeature(
        std::unique_ptr<OGRFeature>(poFeature->Clone()));
    if (!poFeatureNew)
        return OGRERR_FAILURE;

    return m_poDecoratedLayer->CreateFeature(poFeatureNew.get());
}

/************************************************************************/
/*                            IUpsertFeature()                          */
/************************************************************************/

OGRErr OGRWarpedLayer::IUpsertFeature(OGRFeature *poFeature)
{
    auto poFeatureNew = WarpedFeatureToSrcFeature(
        std::unique_ptr<OGRFeature>(poFeature->Clone()));
    if (poFeatureNew == nullptr)
        return OGRERR_FAILURE;

    return m_poDecoratedLayer->UpsertFeature(poFeatureNew.get());
}

/************************************************************************/
/*                            IUpdateFeature()                          */
/************************************************************************/

OGRErr OGRWarpedLayer::IUpdateFeature(OGRFeature *poFeature,
                                      int nUpdatedFieldsCount,
                                      const int *panUpdatedFieldsIdx,
                                      int nUpdatedGeomFieldsCount,
                                      const int *panUpdatedGeomFieldsIdx,
                                      bool bUpdateStyleString)
{
    auto poFeatureNew = WarpedFeatureToSrcFeature(
        std::unique_ptr<OGRFeature>(poFeature->Clone()));
    if (!poFeatureNew)
        return OGRERR_FAILURE;

    return m_poDecoratedLayer->UpdateFeature(
        poFeatureNew.get(), nUpdatedFieldsCount, panUpdatedFieldsIdx,
        nUpdatedGeomFieldsCount, panUpdatedGeomFieldsIdx, bUpdateStyleString);
}

/************************************************************************/
/*                            GetLayerDefn()                           */
/************************************************************************/

const OGRFeatureDefn *OGRWarpedLayer::GetLayerDefn() const
{
    return m_poFeatureDefn;
}

/************************************************************************/
/*                            GetSpatialRef()                           */
/************************************************************************/

const OGRSpatialReference *OGRWarpedLayer::GetSpatialRef() const
{
    if (m_iGeomField == 0)
        return m_poSRS;
    else
        return OGRLayer::GetSpatialRef();
}

/************************************************************************/
/*                           GetFeatureCount()                          */
/************************************************************************/

GIntBig OGRWarpedLayer::GetFeatureCount(int bForce)
{
    if (m_poFilterGeom == nullptr)
        return m_poDecoratedLayer->GetFeatureCount(bForce);

    return OGRLayer::GetFeatureCount(bForce);
}

/************************************************************************/
/*                             IGetExtent()                             */
/************************************************************************/

OGRErr OGRWarpedLayer::IGetExtent(int iGeomField, OGREnvelope *psExtent,
                                  bool bForce)
{
    if (iGeomField == m_iGeomField)
    {
        if (sStaticEnvelope.IsInit())
        {
            *psExtent = sStaticEnvelope;
            return OGRERR_NONE;
        }

        OGREnvelope sExtent;
        OGRErr eErr =
            m_poDecoratedLayer->GetExtent(m_iGeomField, &sExtent, bForce);
        if (eErr != OGRERR_NONE)
            return eErr;

        if (ReprojectEnvelope(&sExtent, m_poCT))
        {
            *psExtent = sExtent;
            return OGRERR_NONE;
        }
        else
            return OGRERR_FAILURE;
    }
    else
        return m_poDecoratedLayer->GetExtent(iGeomField, psExtent, bForce);
}

/************************************************************************/
/*                    TransformAndUpdateBBAndReturnX()                  */
/************************************************************************/

static double TransformAndUpdateBBAndReturnX(OGRCoordinateTransformation *poCT,
                                             double dfX, double dfY,
                                             double &dfMinX, double &dfMinY,
                                             double &dfMaxX, double &dfMaxY)
{
    int bSuccess = FALSE;
    poCT->Transform(1, &dfX, &dfY, nullptr, nullptr, &bSuccess);
    if (bSuccess)
    {
        if (dfX < dfMinX)
            dfMinX = dfX;
        if (dfY < dfMinY)
            dfMinY = dfY;
        if (dfX > dfMaxX)
            dfMaxX = dfX;
        if (dfY > dfMaxY)
            dfMaxY = dfY;
        return dfX;
    }

    return 0.0;
}

/************************************************************************/
/*                            FindXDiscontinuity()                      */
/************************************************************************/

static void FindXDiscontinuity(OGRCoordinateTransformation *poCT, double dfX1,
                               double dfX2, double dfY, double &dfMinX,
                               double &dfMinY, double &dfMaxX, double &dfMaxY,
                               int nRecLevel = 0)
{
    double dfXMid = (dfX1 + dfX2) / 2;

    double dfWrkX1 = TransformAndUpdateBBAndReturnX(poCT, dfX1, dfY, dfMinX,
                                                    dfMinY, dfMaxX, dfMaxY);
    double dfWrkXMid = TransformAndUpdateBBAndReturnX(poCT, dfXMid, dfY, dfMinX,
                                                      dfMinY, dfMaxX, dfMaxY);
    double dfWrkX2 = TransformAndUpdateBBAndReturnX(poCT, dfX2, dfY, dfMinX,
                                                    dfMinY, dfMaxX, dfMaxY);

    double dfDX1 = dfWrkXMid - dfWrkX1;
    double dfDX2 = dfWrkX2 - dfWrkXMid;

    if (dfDX1 * dfDX2 < 0 && nRecLevel < 30)
    {
        FindXDiscontinuity(poCT, dfX1, dfXMid, dfY, dfMinX, dfMinY, dfMaxX,
                           dfMaxY, nRecLevel + 1);
        FindXDiscontinuity(poCT, dfXMid, dfX2, dfY, dfMinX, dfMinY, dfMaxX,
                           dfMaxY, nRecLevel + 1);
    }
}

/************************************************************************/
/*                            ReprojectEnvelope()                       */
/************************************************************************/

int OGRWarpedLayer::ReprojectEnvelope(OGREnvelope *psEnvelope,
                                      OGRCoordinateTransformation *poCT)
{
    const int NSTEP = 20;
    double dfXStep = (psEnvelope->MaxX - psEnvelope->MinX) / NSTEP;
    double dfYStep = (psEnvelope->MaxY - psEnvelope->MinY) / NSTEP;

    double *padfX = static_cast<double *>(
        VSI_MALLOC_VERBOSE((NSTEP + 1) * (NSTEP + 1) * sizeof(double)));
    double *padfY = static_cast<double *>(
        VSI_MALLOC_VERBOSE((NSTEP + 1) * (NSTEP + 1) * sizeof(double)));
    int *pabSuccess = static_cast<int *>(
        VSI_MALLOC_VERBOSE((NSTEP + 1) * (NSTEP + 1) * sizeof(int)));
    if (padfX == nullptr || padfY == nullptr || pabSuccess == nullptr)
    {
        VSIFree(padfX);
        VSIFree(padfY);
        VSIFree(pabSuccess);
        return FALSE;
    }

    for (int j = 0; j <= NSTEP; j++)
    {
        for (int i = 0; i <= NSTEP; i++)
        {
            padfX[j * (NSTEP + 1) + i] = psEnvelope->MinX + i * dfXStep;
            padfY[j * (NSTEP + 1) + i] = psEnvelope->MinY + j * dfYStep;
        }
    }

    int bRet = FALSE;

    if (poCT->Transform((NSTEP + 1) * (NSTEP + 1), padfX, padfY, nullptr,
                        nullptr, pabSuccess))
    {
        double dfMinX = 0.0;
        double dfMinY = 0.0;
        double dfMaxX = 0.0;
        double dfMaxY = 0.0;
        int bSet = FALSE;
        for (int j = 0; j <= NSTEP; j++)
        {
            double dfXOld = 0.0;
            double dfDXOld = 0.0;
            int iOld = -1;
            int iOldOld = -1;
            for (int i = 0; i <= NSTEP; i++)
            {
                if (pabSuccess[j * (NSTEP + 1) + i])
                {
                    double dfX = padfX[j * (NSTEP + 1) + i];
                    double dfY = padfY[j * (NSTEP + 1) + i];

                    if (!bSet)
                    {
                        dfMinX = dfX;
                        dfMaxX = dfX;
                        dfMinY = dfY;
                        dfMaxY = dfY;
                        bSet = TRUE;
                    }
                    else
                    {
                        if (dfX < dfMinX)
                            dfMinX = dfX;
                        if (dfY < dfMinY)
                            dfMinY = dfY;
                        if (dfX > dfMaxX)
                            dfMaxX = dfX;
                        if (dfY > dfMaxY)
                            dfMaxY = dfY;
                    }

                    if (iOld >= 0)
                    {
                        double dfDXNew = dfX - dfXOld;
                        if (iOldOld >= 0 && dfDXNew * dfDXOld < 0)
                        {
                            FindXDiscontinuity(
                                poCT, psEnvelope->MinX + iOldOld * dfXStep,
                                psEnvelope->MinX + i * dfXStep,
                                psEnvelope->MinY + j * dfYStep, dfMinX, dfMinY,
                                dfMaxX, dfMaxY);
                        }
                        dfDXOld = dfDXNew;
                    }

                    dfXOld = dfX;
                    iOldOld = iOld;
                    iOld = i;
                }
            }
        }
        if (bSet)
        {
            psEnvelope->MinX = dfMinX;
            psEnvelope->MinY = dfMinY;
            psEnvelope->MaxX = dfMaxX;
            psEnvelope->MaxY = dfMaxY;
            bRet = TRUE;
        }
    }

    VSIFree(padfX);
    VSIFree(padfY);
    VSIFree(pabSuccess);

    return bRet;
}

/************************************************************************/
/*                             TestCapability()                         */
/************************************************************************/

int OGRWarpedLayer::TestCapability(const char *pszCapability) const
{
    if (EQUAL(pszCapability, OLCFastGetExtent) && sStaticEnvelope.IsInit())
        return TRUE;

    int bVal = m_poDecoratedLayer->TestCapability(pszCapability);

    if (EQUAL(pszCapability, OLCFastGetArrowStream))
        return false;

    if (EQUAL(pszCapability, OLCFastSpatialFilter) ||
        EQUAL(pszCapability, OLCRandomWrite) ||
        EQUAL(pszCapability, OLCSequentialWrite))
    {
        if (bVal)
            bVal = m_poReversedCT != nullptr;
    }
    else if (EQUAL(pszCapability, OLCFastFeatureCount))
    {
        if (bVal)
            bVal = m_poFilterGeom == nullptr;
    }

    return bVal;
}

/************************************************************************/
/*                              SetExtent()                             */
/************************************************************************/

void OGRWarpedLayer::SetExtent(double dfXMin, double dfYMin, double dfXMax,
                               double dfYMax)
{
    sStaticEnvelope.MinX = dfXMin;
    sStaticEnvelope.MinY = dfYMin;
    sStaticEnvelope.MaxX = dfXMax;
    sStaticEnvelope.MaxY = dfYMax;
}

/************************************************************************/
/*                            GetArrowStream()                          */
/************************************************************************/

bool OGRWarpedLayer::GetArrowStream(struct ArrowArrayStream *out_stream,
                                    CSLConstList papszOptions)
{
    return OGRLayer::GetArrowStream(out_stream, papszOptions);
}

#endif /* #ifndef DOXYGEN_SKIP */

Coverage Report

Created: 2025-11-16 06:25

Line	Count	Source
1		/******************************************************************************
2		*
3		* Project: OpenGIS Simple Features Reference Implementation
4		* Purpose: Implements OGRWarpedLayer class
5		* Author: Even Rouault, even dot rouault at spatialys.com
6		*
7		******************************************************************************
8		* Copyright (c) 2012-2014, Even Rouault <even dot rouault at spatialys.com>
9		*
10		* SPDX-License-Identifier: MIT
11		****************************************************************************/
12
13		#ifndef DOXYGEN_SKIP
14
15		#include <cmath>
16
17		#include "ogrwarpedlayer.h"
18
19		/************************************************************************/
20		/* OGRWarpedLayer() */
21		/************************************************************************/
22
23		OGRWarpedLayer::OGRWarpedLayer(OGRLayer *poDecoratedLayer, int iGeomField,
24		int bTakeOwnership,
25		OGRCoordinateTransformation *poCT,
26		OGRCoordinateTransformation *poReversedCT)
27	0	: OGRLayerDecorator(poDecoratedLayer, bTakeOwnership),
28	0	m_poFeatureDefn(poDecoratedLayer->GetLayerDefn()->Clone()),
29	0	m_iGeomField(iGeomField), m_poCT(poCT), m_poReversedCT(poReversedCT),
30	0	m_poSRS(const_cast<OGRSpatialReference *>(m_poCT->GetTargetCS()))
31	0	{
32	0	CPLAssert(poCT != nullptr);
33	0	SetDescription(poDecoratedLayer->GetDescription());
34
35	0	m_poFeatureDefn->Reference();
36	0	if (m_poFeatureDefn->GetGeomFieldCount() > 0)
37	0	m_poFeatureDefn->GetGeomFieldDefn(m_iGeomField)->SetSpatialRef(m_poSRS);
38
39	0	if (m_poSRS != nullptr)
40	0	{
41	0	m_poSRS->Reference();
42	0	}
43	0	} Unexecuted instantiation: OGRWarpedLayer::OGRWarpedLayer(OGRLayer, int, int, OGRCoordinateTransformation, OGRCoordinateTransformation) Unexecuted instantiation: OGRWarpedLayer::OGRWarpedLayer(OGRLayer, int, int, OGRCoordinateTransformation, OGRCoordinateTransformation)
44
45		/************************************************************************/
46		/* ~OGRWarpedLayer() */
47		/************************************************************************/
48
49		OGRWarpedLayer::~OGRWarpedLayer()
50	0	{
51	0	if (m_poFeatureDefn != nullptr)
52	0	m_poFeatureDefn->Release();
53	0	if (m_poSRS != nullptr)
54	0	m_poSRS->Release();
55	0	delete m_poCT;
56	0	delete m_poReversedCT;
57	0	}
58
59		/************************************************************************/
60		/* ISetSpatialFilter() */
61		/************************************************************************/
62
63		OGRErr OGRWarpedLayer::ISetSpatialFilter(int iGeomField,
64		const OGRGeometry *poGeom)
65	0	{
66
67	0	m_iGeomFieldFilter = iGeomField;
68	0	if (InstallFilter(poGeom))
69	0	ResetReading();
70
71	0	if (m_iGeomFieldFilter == m_iGeomField)
72	0	{
73	0	if (poGeom == nullptr \|\| m_poReversedCT == nullptr)
74	0	{
75	0	return m_poDecoratedLayer->SetSpatialFilter(m_iGeomFieldFilter,
76	0	nullptr);
77	0	}
78	0	else
79	0	{
80	0	OGREnvelope sEnvelope;
81	0	poGeom->getEnvelope(&sEnvelope);
82	0	if (std::isinf(sEnvelope.MinX) && std::isinf(sEnvelope.MinY) &&
83	0	std::isinf(sEnvelope.MaxX) && std::isinf(sEnvelope.MaxY))
84	0	{
85	0	return m_poDecoratedLayer->SetSpatialFilterRect(
86	0	m_iGeomFieldFilter, sEnvelope.MinX, sEnvelope.MinY,
87	0	sEnvelope.MaxX, sEnvelope.MaxY);
88	0	}
89	0	else if (ReprojectEnvelope(&sEnvelope, m_poReversedCT))
90	0	{
91	0	return m_poDecoratedLayer->SetSpatialFilterRect(
92	0	m_iGeomFieldFilter, sEnvelope.MinX, sEnvelope.MinY,
93	0	sEnvelope.MaxX, sEnvelope.MaxY);
94	0	}
95	0	else
96	0	{
97	0	return m_poDecoratedLayer->SetSpatialFilter(m_iGeomFieldFilter,
98	0	nullptr);
99	0	}
100	0	}
101	0	}
102	0	else
103	0	{
104	0	return m_poDecoratedLayer->SetSpatialFilter(m_iGeomFieldFilter, poGeom);
105	0	}
106	0	}
107
108		/************************************************************************/
109		/* TranslateFeature() */
110		/************************************************************************/
111
112		void OGRWarpedLayer::TranslateFeature(
113		std::unique_ptr<OGRFeature> poSrcFeature,
114		std::vector<std::unique_ptr<OGRFeature>> &apoOutFeatures)
115	0	{
116	0	apoOutFeatures.push_back(
117	0	SrcFeatureToWarpedFeature(std::move(poSrcFeature)));
118	0	}
119
120		/************************************************************************/
121		/* SrcFeatureToWarpedFeature() */
122		/************************************************************************/
123
124		std::unique_ptr<OGRFeature>
125		OGRWarpedLayer::SrcFeatureToWarpedFeature(std::unique_ptr<OGRFeature> poFeature)
126	0	{
127		// This is safe to do here as they have matching attribute and geometry
128		// fields
129	0	OGRLayer *poThisLayer = this;
130	0	poFeature->SetFDefnUnsafe(poThisLayer->GetLayerDefn());
131
132	0	OGRGeometry *poGeom = poFeature->GetGeomFieldRef(m_iGeomField);
133	0	if (poGeom)
134	0	{
135	0	auto poNewGeom = OGRGeometryFactory::transformWithOptions(
136	0	poGeom, m_poCT, nullptr, m_transformCacheForward);
137	0	poFeature->SetGeomFieldDirectly(m_iGeomField, poNewGeom);
138	0	}
139
140	0	return poFeature;
141	0	}
142
143		/************************************************************************/
144		/* WarpedFeatureToSrcFeature() */
145		/************************************************************************/
146
147		std::unique_ptr<OGRFeature>
148		OGRWarpedLayer::WarpedFeatureToSrcFeature(std::unique_ptr<OGRFeature> poFeature)
149	0	{
150		// This is safe to do here as they have matching attribute and geometry
151		// fields
152	0	poFeature->SetFDefnUnsafe(m_poDecoratedLayer->GetLayerDefn());
153
154	0	OGRGeometry *poGeom = poFeature->GetGeomFieldRef(m_iGeomField);
155	0	if (poGeom)
156	0	{
157	0	if (!m_poReversedCT)
158	0	return nullptr;
159	0	auto poNewGeom = OGRGeometryFactory::transformWithOptions(
160	0	poGeom, m_poReversedCT, nullptr, m_transformCacheReverse);
161	0	if (!poNewGeom)
162	0	return nullptr;
163	0	poFeature->SetGeomFieldDirectly(m_iGeomField, poNewGeom);
164	0	}
165
166	0	return poFeature;
167	0	}
168
169		/************************************************************************/
170		/* GetNextFeature() */
171		/************************************************************************/
172
173		OGRFeature *OGRWarpedLayer::GetNextFeature()
174	0	{
175	0	while (true)
176	0	{
177	0	auto poFeature =
178	0	std::unique_ptr<OGRFeature>(m_poDecoratedLayer->GetNextFeature());
179	0	if (!poFeature)
180	0	return nullptr;
181
182	0	auto poFeatureNew = SrcFeatureToWarpedFeature(std::move(poFeature));
183	0	const OGRGeometry *poGeom = poFeatureNew->GetGeomFieldRef(m_iGeomField);
184	0	if (m_poFilterGeom != nullptr && !FilterGeometry(poGeom))
185	0	{
186	0	continue;
187	0	}
188
189	0	return poFeatureNew.release();
190	0	}
191	0	}
192
193		/************************************************************************/
194		/* GetFeature() */
195		/************************************************************************/
196
197		OGRFeature *OGRWarpedLayer::GetFeature(GIntBig nFID)
198	0	{
199	0	auto poFeature =
200	0	std::unique_ptr<OGRFeature>(m_poDecoratedLayer->GetFeature(nFID));
201	0	if (poFeature)
202	0	{
203	0	poFeature = SrcFeatureToWarpedFeature(std::move(poFeature));
204	0	}
205	0	return poFeature.release();
206	0	}
207
208		/************************************************************************/
209		/* ISetFeature() */
210		/************************************************************************/
211
212		OGRErr OGRWarpedLayer::ISetFeature(OGRFeature *poFeature)
213	0	{
214	0	auto poFeatureNew = WarpedFeatureToSrcFeature(
215	0	std::unique_ptr<OGRFeature>(poFeature->Clone()));
216	0	if (!poFeatureNew)
217	0	return OGRERR_FAILURE;
218
219	0	return m_poDecoratedLayer->SetFeature(poFeatureNew.get());
220	0	}
221
222		/************************************************************************/
223		/* ICreateFeature() */
224		/************************************************************************/
225
226		OGRErr OGRWarpedLayer::ICreateFeature(OGRFeature *poFeature)
227	0	{
228	0	auto poFeatureNew = WarpedFeatureToSrcFeature(
229	0	std::unique_ptr<OGRFeature>(poFeature->Clone()));
230	0	if (!poFeatureNew)
231	0	return OGRERR_FAILURE;
232
233	0	return m_poDecoratedLayer->CreateFeature(poFeatureNew.get());
234	0	}
235
236		/************************************************************************/
237		/* IUpsertFeature() */
238		/************************************************************************/
239
240		OGRErr OGRWarpedLayer::IUpsertFeature(OGRFeature *poFeature)
241	0	{
242	0	auto poFeatureNew = WarpedFeatureToSrcFeature(
243	0	std::unique_ptr<OGRFeature>(poFeature->Clone()));
244	0	if (poFeatureNew == nullptr)
245	0	return OGRERR_FAILURE;
246
247	0	return m_poDecoratedLayer->UpsertFeature(poFeatureNew.get());
248	0	}
249
250		/************************************************************************/
251		/* IUpdateFeature() */
252		/************************************************************************/
253
254		OGRErr OGRWarpedLayer::IUpdateFeature(OGRFeature *poFeature,
255		int nUpdatedFieldsCount,
256		const int *panUpdatedFieldsIdx,
257		int nUpdatedGeomFieldsCount,
258		const int *panUpdatedGeomFieldsIdx,
259		bool bUpdateStyleString)
260	0	{
261	0	auto poFeatureNew = WarpedFeatureToSrcFeature(
262	0	std::unique_ptr<OGRFeature>(poFeature->Clone()));
263	0	if (!poFeatureNew)
264	0	return OGRERR_FAILURE;
265
266	0	return m_poDecoratedLayer->UpdateFeature(
267	0	poFeatureNew.get(), nUpdatedFieldsCount, panUpdatedFieldsIdx,
268	0	nUpdatedGeomFieldsCount, panUpdatedGeomFieldsIdx, bUpdateStyleString);
269	0	}
270
271		/************************************************************************/
272		/* GetLayerDefn() */
273		/************************************************************************/
274
275		const OGRFeatureDefn *OGRWarpedLayer::GetLayerDefn() const
276	0	{
277	0	return m_poFeatureDefn;
278	0	}
279
280		/************************************************************************/
281		/* GetSpatialRef() */
282		/************************************************************************/
283
284		const OGRSpatialReference *OGRWarpedLayer::GetSpatialRef() const
285	0	{
286	0	if (m_iGeomField == 0)
287	0	return m_poSRS;
288	0	else
289	0	return OGRLayer::GetSpatialRef();
290	0	}
291
292		/************************************************************************/
293		/* GetFeatureCount() */
294		/************************************************************************/
295
296		GIntBig OGRWarpedLayer::GetFeatureCount(int bForce)
297	0	{
298	0	if (m_poFilterGeom == nullptr)
299	0	return m_poDecoratedLayer->GetFeatureCount(bForce);
300
301	0	return OGRLayer::GetFeatureCount(bForce);
302	0	}
303
304		/************************************************************************/
305		/* IGetExtent() */
306		/************************************************************************/
307
308		OGRErr OGRWarpedLayer::IGetExtent(int iGeomField, OGREnvelope *psExtent,
309		bool bForce)
310	0	{
311	0	if (iGeomField == m_iGeomField)
312	0	{
313	0	if (sStaticEnvelope.IsInit())
314	0	{
315	0	*psExtent = sStaticEnvelope;
316	0	return OGRERR_NONE;
317	0	}
318
319	0	OGREnvelope sExtent;
320	0	OGRErr eErr =
321	0	m_poDecoratedLayer->GetExtent(m_iGeomField, &sExtent, bForce);
322	0	if (eErr != OGRERR_NONE)
323	0	return eErr;
324
325	0	if (ReprojectEnvelope(&sExtent, m_poCT))
326	0	{
327	0	*psExtent = sExtent;
328	0	return OGRERR_NONE;
329	0	}
330	0	else
331	0	return OGRERR_FAILURE;
332	0	}
333	0	else
334	0	return m_poDecoratedLayer->GetExtent(iGeomField, psExtent, bForce);
335	0	}
336
337		/************************************************************************/
338		/* TransformAndUpdateBBAndReturnX() */
339		/************************************************************************/
340
341		static double TransformAndUpdateBBAndReturnX(OGRCoordinateTransformation *poCT,
342		double dfX, double dfY,
343		double &dfMinX, double &dfMinY,
344		double &dfMaxX, double &dfMaxY)
345	0	{
346	0	int bSuccess = FALSE;
347	0	poCT->Transform(1, &dfX, &dfY, nullptr, nullptr, &bSuccess);
348	0	if (bSuccess)
349	0	{
350	0	if (dfX < dfMinX)
351	0	dfMinX = dfX;
352	0	if (dfY < dfMinY)
353	0	dfMinY = dfY;
354	0	if (dfX > dfMaxX)
355	0	dfMaxX = dfX;
356	0	if (dfY > dfMaxY)
357	0	dfMaxY = dfY;
358	0	return dfX;
359	0	}
360
361	0	return 0.0;
362	0	}
363
364		/************************************************************************/
365		/* FindXDiscontinuity() */
366		/************************************************************************/
367
368		static void FindXDiscontinuity(OGRCoordinateTransformation *poCT, double dfX1,
369		double dfX2, double dfY, double &dfMinX,
370		double &dfMinY, double &dfMaxX, double &dfMaxY,
371		int nRecLevel = 0)
372	0	{
373	0	double dfXMid = (dfX1 + dfX2) / 2;
374
375	0	double dfWrkX1 = TransformAndUpdateBBAndReturnX(poCT, dfX1, dfY, dfMinX,
376	0	dfMinY, dfMaxX, dfMaxY);
377	0	double dfWrkXMid = TransformAndUpdateBBAndReturnX(poCT, dfXMid, dfY, dfMinX,
378	0	dfMinY, dfMaxX, dfMaxY);
379	0	double dfWrkX2 = TransformAndUpdateBBAndReturnX(poCT, dfX2, dfY, dfMinX,
380	0	dfMinY, dfMaxX, dfMaxY);
381
382	0	double dfDX1 = dfWrkXMid - dfWrkX1;
383	0	double dfDX2 = dfWrkX2 - dfWrkXMid;
384
385	0	if (dfDX1 * dfDX2 < 0 && nRecLevel < 30)
386	0	{
387	0	FindXDiscontinuity(poCT, dfX1, dfXMid, dfY, dfMinX, dfMinY, dfMaxX,
388	0	dfMaxY, nRecLevel + 1);
389	0	FindXDiscontinuity(poCT, dfXMid, dfX2, dfY, dfMinX, dfMinY, dfMaxX,
390	0	dfMaxY, nRecLevel + 1);
391	0	}
392	0	}
393
394		/************************************************************************/
395		/* ReprojectEnvelope() */
396		/************************************************************************/
397
398		int OGRWarpedLayer::ReprojectEnvelope(OGREnvelope *psEnvelope,
399		OGRCoordinateTransformation *poCT)
400	0	{
401	0	const int NSTEP = 20;
402	0	double dfXStep = (psEnvelope->MaxX - psEnvelope->MinX) / NSTEP;
403	0	double dfYStep = (psEnvelope->MaxY - psEnvelope->MinY) / NSTEP;
404
405	0	double padfX = static_cast<double >(
406	0	VSI_MALLOC_VERBOSE((NSTEP + 1) * (NSTEP + 1) * sizeof(double)));
407	0	double padfY = static_cast<double >(
408	0	VSI_MALLOC_VERBOSE((NSTEP + 1) * (NSTEP + 1) * sizeof(double)));
409	0	int pabSuccess = static_cast<int >(
410	0	VSI_MALLOC_VERBOSE((NSTEP + 1) * (NSTEP + 1) * sizeof(int)));
411	0	if (padfX == nullptr \|\| padfY == nullptr \|\| pabSuccess == nullptr)
412	0	{
413	0	VSIFree(padfX);
414	0	VSIFree(padfY);
415	0	VSIFree(pabSuccess);
416	0	return FALSE;
417	0	}
418
419	0	for (int j = 0; j <= NSTEP; j++)
420	0	{
421	0	for (int i = 0; i <= NSTEP; i++)
422	0	{
423	0	padfX[j * (NSTEP + 1) + i] = psEnvelope->MinX + i * dfXStep;
424	0	padfY[j * (NSTEP + 1) + i] = psEnvelope->MinY + j * dfYStep;
425	0	}
426	0	}
427
428	0	int bRet = FALSE;
429
430	0	if (poCT->Transform((NSTEP + 1) * (NSTEP + 1), padfX, padfY, nullptr,
431	0	nullptr, pabSuccess))
432	0	{
433	0	double dfMinX = 0.0;
434	0	double dfMinY = 0.0;
435	0	double dfMaxX = 0.0;
436	0	double dfMaxY = 0.0;
437	0	int bSet = FALSE;
438	0	for (int j = 0; j <= NSTEP; j++)
439	0	{
440	0	double dfXOld = 0.0;
441	0	double dfDXOld = 0.0;
442	0	int iOld = -1;
443	0	int iOldOld = -1;
444	0	for (int i = 0; i <= NSTEP; i++)
445	0	{
446	0	if (pabSuccess[j * (NSTEP + 1) + i])
447	0	{
448	0	double dfX = padfX[j * (NSTEP + 1) + i];
449	0	double dfY = padfY[j * (NSTEP + 1) + i];
450
451	0	if (!bSet)
452	0	{
453	0	dfMinX = dfX;
454	0	dfMaxX = dfX;
455	0	dfMinY = dfY;
456	0	dfMaxY = dfY;
457	0	bSet = TRUE;
458	0	}
459	0	else
460	0	{
461	0	if (dfX < dfMinX)
462	0	dfMinX = dfX;
463	0	if (dfY < dfMinY)
464	0	dfMinY = dfY;
465	0	if (dfX > dfMaxX)
466	0	dfMaxX = dfX;
467	0	if (dfY > dfMaxY)
468	0	dfMaxY = dfY;
469	0	}
470
471	0	if (iOld >= 0)
472	0	{
473	0	double dfDXNew = dfX - dfXOld;
474	0	if (iOldOld >= 0 && dfDXNew * dfDXOld < 0)
475	0	{
476	0	FindXDiscontinuity(
477	0	poCT, psEnvelope->MinX + iOldOld * dfXStep,
478	0	psEnvelope->MinX + i * dfXStep,
479	0	psEnvelope->MinY + j * dfYStep, dfMinX, dfMinY,
480	0	dfMaxX, dfMaxY);
481	0	}
482	0	dfDXOld = dfDXNew;
483	0	}
484
485	0	dfXOld = dfX;
486	0	iOldOld = iOld;
487	0	iOld = i;
488	0	}
489	0	}
490	0	}
491	0	if (bSet)
492	0	{
493	0	psEnvelope->MinX = dfMinX;
494	0	psEnvelope->MinY = dfMinY;
495	0	psEnvelope->MaxX = dfMaxX;
496	0	psEnvelope->MaxY = dfMaxY;
497	0	bRet = TRUE;
498	0	}
499	0	}
500
501	0	VSIFree(padfX);
502	0	VSIFree(padfY);
503	0	VSIFree(pabSuccess);
504
505	0	return bRet;
506	0	}
507
508		/************************************************************************/
509		/* TestCapability() */
510		/************************************************************************/
511
512		int OGRWarpedLayer::TestCapability(const char *pszCapability) const
513	0	{
514	0	if (EQUAL(pszCapability, OLCFastGetExtent) && sStaticEnvelope.IsInit())
515	0	return TRUE;
516
517	0	int bVal = m_poDecoratedLayer->TestCapability(pszCapability);
518
519	0	if (EQUAL(pszCapability, OLCFastGetArrowStream))
520	0	return false;
521
522	0	if (EQUAL(pszCapability, OLCFastSpatialFilter) \|\|
523	0	EQUAL(pszCapability, OLCRandomWrite) \|\|
524	0	EQUAL(pszCapability, OLCSequentialWrite))
525	0	{
526	0	if (bVal)
527	0	bVal = m_poReversedCT != nullptr;
528	0	}
529	0	else if (EQUAL(pszCapability, OLCFastFeatureCount))
530	0	{
531	0	if (bVal)
532	0	bVal = m_poFilterGeom == nullptr;
533	0	}
534
535	0	return bVal;
536	0	}
537
538		/************************************************************************/
539		/* SetExtent() */
540		/************************************************************************/
541
542		void OGRWarpedLayer::SetExtent(double dfXMin, double dfYMin, double dfXMax,
543		double dfYMax)
544	0	{
545	0	sStaticEnvelope.MinX = dfXMin;
546	0	sStaticEnvelope.MinY = dfYMin;
547	0	sStaticEnvelope.MaxX = dfXMax;
548	0	sStaticEnvelope.MaxY = dfYMax;
549	0	}
550
551		/************************************************************************/
552		/* GetArrowStream() */
553		/************************************************************************/
554
555		bool OGRWarpedLayer::GetArrowStream(struct ArrowArrayStream *out_stream,
556		CSLConstList papszOptions)
557	0	{
558	0	return OGRLayer::GetArrowStream(out_stream, papszOptions);
559	0	}
560
561		#endif /* #ifndef DOXYGEN_SKIP */