/src/gdal/gcore/gdalnodatamaskband.cpp

Source (jump to first uncovered line)
/******************************************************************************
 *
 * Project:  GDAL Core
 * Purpose:  Implementation of GDALNoDataMaskBand, a class implementing all
 *           a default band mask based on nodata values.
 * Author:   Frank Warmerdam, warmerdam@pobox.com
 *
 ******************************************************************************
 * Copyright (c) 2007, Frank Warmerdam
 * Copyright (c) 2008-2012, Even Rouault <even dot rouault at spatialys.com>
 *
 * SPDX-License-Identifier: MIT
 ****************************************************************************/

#include "cpl_port.h"
#include "gdal_priv.h"

#include <algorithm>
#include <cmath>
#include <cstring>
#include <utility>

#include "cpl_conv.h"
#include "cpl_error.h"
#include "cpl_vsi.h"
#include "gdal.h"
#include "gdal_priv_templates.hpp"

//! @cond Doxygen_Suppress
/************************************************************************/
/*                        GDALNoDataMaskBand()                          */
/************************************************************************/

GDALNoDataMaskBand::GDALNoDataMaskBand(GDALRasterBand *poParentIn)
    : m_poParent(poParentIn)
{
    poDS = nullptr;
    nBand = 0;

    nRasterXSize = m_poParent->GetXSize();
    nRasterYSize = m_poParent->GetYSize();

    eDataType = GDT_Byte;
    m_poParent->GetBlockSize(&nBlockXSize, &nBlockYSize);

    const auto eParentDT = m_poParent->GetRasterDataType();
    if (eParentDT == GDT_Int64)
        m_nNoDataValueInt64 = m_poParent->GetNoDataValueAsInt64();
    else if (eParentDT == GDT_UInt64)
        m_nNoDataValueUInt64 = m_poParent->GetNoDataValueAsUInt64();
    else
        m_dfNoDataValue = m_poParent->GetNoDataValue();
}

/************************************************************************/
/*                        GDALNoDataMaskBand()                          */
/************************************************************************/

GDALNoDataMaskBand::GDALNoDataMaskBand(GDALRasterBand *poParentIn,
                                       double dfNoDataValue)
    : m_poParent(poParentIn)
{
    poDS = nullptr;
    nBand = 0;

    nRasterXSize = m_poParent->GetXSize();
    nRasterYSize = m_poParent->GetYSize();

    eDataType = GDT_Byte;
    m_poParent->GetBlockSize(&nBlockXSize, &nBlockYSize);

    const auto eParentDT = m_poParent->GetRasterDataType();
    if (eParentDT == GDT_Int64)
        m_nNoDataValueInt64 = static_cast<int64_t>(dfNoDataValue);
    else if (eParentDT == GDT_UInt64)
        m_nNoDataValueUInt64 = static_cast<uint64_t>(dfNoDataValue);
    else
        m_dfNoDataValue = dfNoDataValue;
}

/************************************************************************/
/*                       ~GDALNoDataMaskBand()                          */
/************************************************************************/

GDALNoDataMaskBand::~GDALNoDataMaskBand() = default;

/************************************************************************/
/*                          GetWorkDataType()                           */
/************************************************************************/

static GDALDataType GetWorkDataType(GDALDataType eDataType)
{
    GDALDataType eWrkDT = GDT_Unknown;
    switch (eDataType)
    {
        case GDT_Byte:
            eWrkDT = GDT_Byte;
            break;

        case GDT_Int16:
            eWrkDT = GDT_Int16;
            break;

        case GDT_UInt16:
            eWrkDT = GDT_UInt16;
            break;

        case GDT_UInt32:
            eWrkDT = GDT_UInt32;
            break;

        case GDT_Int8:
        case GDT_Int32:
        case GDT_CInt16:
        case GDT_CInt32:
            eWrkDT = GDT_Int32;
            break;

        case GDT_Float16:
        case GDT_CFloat16:
        case GDT_Float32:
        case GDT_CFloat32:
            eWrkDT = GDT_Float32;
            break;

        case GDT_Float64:
        case GDT_CFloat64:
            eWrkDT = GDT_Float64;
            break;

        case GDT_Int64:
        case GDT_UInt64:
            eWrkDT = eDataType;
            break;

        case GDT_Unknown:
        case GDT_TypeCount:
            CPLAssert(false);
            eWrkDT = GDT_Float64;
            break;
    }
    return eWrkDT;
}

/************************************************************************/
/*                          IsNoDataInRange()                           */
/************************************************************************/

bool GDALNoDataMaskBand::IsNoDataInRange(double dfNoDataValue,
                                         GDALDataType eDataTypeIn)
{
    GDALDataType eWrkDT = GetWorkDataType(eDataTypeIn);
    switch (eWrkDT)
    {
        case GDT_Byte:
        {
            return GDALIsValueInRange<GByte>(dfNoDataValue);
        }

        case GDT_Int16:
        {
            return GDALIsValueInRange<GInt16>(dfNoDataValue);
        }

        case GDT_UInt16:
        {
            return GDALIsValueInRange<GUInt16>(dfNoDataValue);
        }

        case GDT_UInt32:
        {
            return GDALIsValueInRange<GUInt32>(dfNoDataValue);
        }
        case GDT_Int32:
        {
            return GDALIsValueInRange<GInt32>(dfNoDataValue);
        }

        case GDT_UInt64:
        {
            return GDALIsValueInRange<uint64_t>(dfNoDataValue);
        }

        case GDT_Int64:
        {
            return GDALIsValueInRange<int64_t>(dfNoDataValue);
        }

        case GDT_Float16:
        {
            return std::isnan(dfNoDataValue) || std::isinf(dfNoDataValue) ||
                   GDALIsValueInRange<GFloat16>(dfNoDataValue);
        }

        case GDT_Float32:
        {
            return std::isnan(dfNoDataValue) || std::isinf(dfNoDataValue) ||
                   GDALIsValueInRange<float>(dfNoDataValue);
        }

        case GDT_Float64:
        {
            return true;
        }

        default:
            CPLAssert(false);
            return false;
    }
}

/************************************************************************/
/*                             IReadBlock()                             */
/************************************************************************/

CPLErr GDALNoDataMaskBand::IReadBlock(int nXBlockOff, int nYBlockOff,
                                      void *pImage)

{
    const int nXOff = nXBlockOff * nBlockXSize;
    const int nXSizeRequest = std::min(nBlockXSize, nRasterXSize - nXOff);
    const int nYOff = nYBlockOff * nBlockYSize;
    const int nYSizeRequest = std::min(nBlockYSize, nRasterYSize - nYOff);

    if (nBlockXSize != nXSizeRequest || nBlockYSize != nYSizeRequest)
    {
        memset(pImage, 0, static_cast<GPtrDiff_t>(nBlockXSize) * nBlockYSize);
    }

    GDALRasterIOExtraArg sExtraArg;
    INIT_RASTERIO_EXTRA_ARG(sExtraArg);
    return IRasterIO(GF_Read, nXOff, nYOff, nXSizeRequest, nYSizeRequest,
                     pImage, nXSizeRequest, nYSizeRequest, GDT_Byte, 1,
                     nBlockXSize, &sExtraArg);
}

/************************************************************************/
/*                            SetZeroOr255()                            */
/************************************************************************/

#if (defined(__GNUC__) && !defined(__clang__))
__attribute__((optimize("tree-vectorize")))
#endif
static void
SetZeroOr255(GByte *pabyDestAndSrc, size_t nBufSize, GByte byNoData)
{
    for (size_t i = 0; i < nBufSize; ++i)
    {
        pabyDestAndSrc[i] = (pabyDestAndSrc[i] == byNoData) ? 0 : 255;
    }
}

template <class T>
#if (defined(__GNUC__) && !defined(__clang__))
__attribute__((optimize("tree-vectorize")))
#endif
static void
SetZeroOr255(GByte *pabyDest, const T *panSrc, size_t nBufSize, T nNoData)
{
    for (size_t i = 0; i < nBufSize; ++i)
    {
        pabyDest[i] = (panSrc[i] == nNoData) ? 0 : 255;
    }
}

template <class T>
static void SetZeroOr255(GByte *pabyDest, const T *panSrc, int nBufXSize,
                         int nBufYSize, GSpacing nPixelSpace,
                         GSpacing nLineSpace, T nNoData)
{
    if (nPixelSpace == 1 && nLineSpace == nBufXSize)
    {
        const size_t nBufSize = static_cast<size_t>(nBufXSize) * nBufYSize;
        SetZeroOr255(pabyDest, panSrc, nBufSize, nNoData);
    }
    else if (nPixelSpace == 1)
    {
        for (int iY = 0; iY < nBufYSize; iY++)
        {
            SetZeroOr255(pabyDest, panSrc, nBufXSize, nNoData);
            pabyDest += nLineSpace;
            panSrc += nBufXSize;
        }
    }
    else
    {
        size_t i = 0;
        for (int iY = 0; iY < nBufYSize; iY++)
        {
            GByte *pabyLineDest = pabyDest + iY * nLineSpace;
            for (int iX = 0; iX < nBufXSize; iX++)
            {
                *pabyLineDest = (panSrc[i] == nNoData) ? 0 : 255;
                ++i;
                pabyLineDest += nPixelSpace;
            }
        }
    }
}

/************************************************************************/
/*                             IRasterIO()                              */
/************************************************************************/

CPLErr GDALNoDataMaskBand::IRasterIO(GDALRWFlag eRWFlag, int nXOff, int nYOff,
                                     int nXSize, int nYSize, void *pData,
                                     int nBufXSize, int nBufYSize,
                                     GDALDataType eBufType,
                                     GSpacing nPixelSpace, GSpacing nLineSpace,
                                     GDALRasterIOExtraArg *psExtraArg)
{
    if (eRWFlag != GF_Read)
    {
        return CE_Failure;
    }
    const auto eParentDT = m_poParent->GetRasterDataType();
    const GDALDataType eWrkDT = GetWorkDataType(eParentDT);

    // Optimization in common use case (#4488).
    // This avoids triggering the block cache on this band, which helps
    // reducing the global block cache consumption.
    if (eBufType == GDT_Byte && eWrkDT == GDT_Byte)
    {
        const CPLErr eErr = m_poParent->RasterIO(
            GF_Read, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize, nBufYSize,
            eBufType, nPixelSpace, nLineSpace, psExtraArg);
        if (eErr != CE_None)
            return eErr;

        GByte *pabyData = static_cast<GByte *>(pData);
        const GByte byNoData = static_cast<GByte>(m_dfNoDataValue);

        if (nPixelSpace == 1 && nLineSpace == nBufXSize)
        {
            const size_t nBufSize = static_cast<size_t>(nBufXSize) * nBufYSize;
            SetZeroOr255(pabyData, nBufSize, byNoData);
        }
        else
        {
            SetZeroOr255(pabyData, pabyData, nBufXSize, nBufYSize, nPixelSpace,
                         nLineSpace, byNoData);
        }
        return CE_None;
    }

    const auto AllocTempBufferOrFallback =
        [this, eRWFlag, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize,
         nBufYSize, eBufType, nPixelSpace, nLineSpace,
         psExtraArg](int nWrkDTSize) -> std::pair<CPLErr, void *>
    {
        auto poParentDS = m_poParent->GetDataset();
        // Check if we must simulate a memory allocation failure
        // Before checking the env variable, which is slightly expensive,
        // check first for a special dataset name, which is a cheap test.
        const char *pszOptVal =
            poParentDS && strcmp(poParentDS->GetDescription(), "__debug__") == 0
                ? CPLGetConfigOption(
                      "GDAL_SIMUL_MEM_ALLOC_FAILURE_NODATA_MASK_BAND", "NO")
                : "NO";
        const bool bSimulMemAllocFailure =
            EQUAL(pszOptVal, "ALWAYS") ||
            (CPLTestBool(pszOptVal) &&
             GDALMajorObject::GetMetadataItem(__func__, "__INTERNAL__") ==
                 nullptr);
        void *pTemp = nullptr;
        if (!bSimulMemAllocFailure)
        {
            CPLErrorStateBackuper oErrorStateBackuper(CPLQuietErrorHandler);
            pTemp = VSI_MALLOC3_VERBOSE(nWrkDTSize, nBufXSize, nBufYSize);
        }
        if (!pTemp)
        {
            const bool bAllocHasAlreadyFailed =
                GDALMajorObject::GetMetadataItem(__func__, "__INTERNAL__") !=
                nullptr;
            CPLError(bAllocHasAlreadyFailed ? CE_Failure : CE_Warning,
                     CPLE_OutOfMemory,
                     "GDALNoDataMaskBand::IRasterIO(): cannot allocate %d x %d "
                     "x %d bytes%s",
                     nBufXSize, nBufYSize, nWrkDTSize,
                     bAllocHasAlreadyFailed
                         ? ""
                         : ". Falling back to block-based approach");
            if (bAllocHasAlreadyFailed)
                return std::pair(CE_Failure, nullptr);
            // Sets a metadata item to prevent potential infinite recursion
            GDALMajorObject::SetMetadataItem(__func__, "IN", "__INTERNAL__");
            const CPLErr eErr = GDALRasterBand::IRasterIO(
                eRWFlag, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize,
                nBufYSize, eBufType, nPixelSpace, nLineSpace, psExtraArg);
            GDALMajorObject::SetMetadataItem(__func__, nullptr, "__INTERNAL__");
            return std::pair(eErr, nullptr);
        }
        return std::pair(CE_None, pTemp);
    };

    if (eBufType == GDT_Byte)
    {
        const int nWrkDTSize = GDALGetDataTypeSizeBytes(eWrkDT);
        auto [eErr, pTemp] = AllocTempBufferOrFallback(nWrkDTSize);
        if (!pTemp)
            return eErr;

        eErr = m_poParent->RasterIO(
            GF_Read, nXOff, nYOff, nXSize, nYSize, pTemp, nBufXSize, nBufYSize,
            eWrkDT, nWrkDTSize, static_cast<GSpacing>(nBufXSize) * nWrkDTSize,
            psExtraArg);
        if (eErr != CE_None)
        {
            VSIFree(pTemp);
            return eErr;
        }

        const bool bIsNoDataNan = std::isnan(m_dfNoDataValue) != 0;
        GByte *pabyDest = static_cast<GByte *>(pData);

        /* --------------------------------------------------------------------
         */
        /*      Process different cases. */
        /* --------------------------------------------------------------------
         */
        switch (eWrkDT)
        {
            case GDT_Int16:
            {
                const auto nNoData = static_cast<int16_t>(m_dfNoDataValue);
                const auto *panSrc = static_cast<const int16_t *>(pTemp);
                SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
                             nPixelSpace, nLineSpace, nNoData);
            }
            break;

            case GDT_UInt16:
            {
                const auto nNoData = static_cast<uint16_t>(m_dfNoDataValue);
                const auto *panSrc = static_cast<const uint16_t *>(pTemp);
                SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
                             nPixelSpace, nLineSpace, nNoData);
            }
            break;

            case GDT_UInt32:
            {
                const auto nNoData = static_cast<GUInt32>(m_dfNoDataValue);
                const auto *panSrc = static_cast<const GUInt32 *>(pTemp);
                SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
                             nPixelSpace, nLineSpace, nNoData);
            }
            break;

            case GDT_Int32:
            {
                const auto nNoData = static_cast<GInt32>(m_dfNoDataValue);
                const auto *panSrc = static_cast<const GInt32 *>(pTemp);
                SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
                             nPixelSpace, nLineSpace, nNoData);
            }
            break;

            case GDT_Float32:
            {
                const float fNoData = static_cast<float>(m_dfNoDataValue);
                const float *pafSrc = static_cast<const float *>(pTemp);

                size_t i = 0;
                for (int iY = 0; iY < nBufYSize; iY++)
                {
                    GByte *pabyLineDest = pabyDest + iY * nLineSpace;
                    for (int iX = 0; iX < nBufXSize; iX++)
                    {
                        const float fVal = pafSrc[i];
                        if (bIsNoDataNan && std::isnan(fVal))
                            *pabyLineDest = 0;
                        else if (ARE_REAL_EQUAL(fVal, fNoData))
                            *pabyLineDest = 0;
                        else
                            *pabyLineDest = 255;
                        ++i;
                        pabyLineDest += nPixelSpace;
                    }
                }
            }
            break;

            case GDT_Float64:
            {
                const double *padfSrc = static_cast<const double *>(pTemp);

                size_t i = 0;
                for (int iY = 0; iY < nBufYSize; iY++)
                {
                    GByte *pabyLineDest = pabyDest + iY * nLineSpace;
                    for (int iX = 0; iX < nBufXSize; iX++)
                    {
                        const double dfVal = padfSrc[i];
                        if (bIsNoDataNan && std::isnan(dfVal))
                            *pabyLineDest = 0;
                        else if (ARE_REAL_EQUAL(dfVal, m_dfNoDataValue))
                            *pabyLineDest = 0;
                        else
                            *pabyLineDest = 255;
                        ++i;
                        pabyLineDest += nPixelSpace;
                    }
                }
            }
            break;

            case GDT_Int64:
            {
                const auto *panSrc = static_cast<const int64_t *>(pTemp);
                SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
                             nPixelSpace, nLineSpace, m_nNoDataValueInt64);
            }
            break;

            case GDT_UInt64:
            {
                const auto *panSrc = static_cast<const uint64_t *>(pTemp);
                SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
                             nPixelSpace, nLineSpace, m_nNoDataValueUInt64);
            }
            break;

            default:
                CPLAssert(false);
                break;
        }

        VSIFree(pTemp);
        return CE_None;
    }

    // Output buffer is non-Byte. Ask for Byte and expand to user requested
    // type
    auto [eErr, pTemp] = AllocTempBufferOrFallback(sizeof(GByte));
    if (!pTemp)
        return eErr;

    eErr = IRasterIO(eRWFlag, nXOff, nYOff, nXSize, nYSize, pTemp, nBufXSize,
                     nBufYSize, GDT_Byte, 1, nBufXSize, psExtraArg);
    if (eErr != CE_None)
    {
        VSIFree(pTemp);
        return eErr;
    }

    for (int iY = 0; iY < nBufYSize; iY++)
    {
        GDALCopyWords64(
            static_cast<GByte *>(pTemp) + static_cast<size_t>(iY) * nBufXSize,
            GDT_Byte, 1, static_cast<GByte *>(pData) + iY * nLineSpace,
            eBufType, static_cast<int>(nPixelSpace), nBufXSize);
    }
    VSIFree(pTemp);
    return CE_None;
}

/************************************************************************/
/*                   EmitErrorMessageIfWriteNotSupported()              */
/************************************************************************/

bool GDALNoDataMaskBand::EmitErrorMessageIfWriteNotSupported(
    const char *pszCaller) const
{
    ReportError(CE_Failure, CPLE_NoWriteAccess,
                "%s: attempt to write to a nodata implicit mask band.",
                pszCaller);

    return true;
}

//! @endcond

Coverage Report

Created: 2025-06-13 06:29

Line	Count	Source (jump to first uncovered line)
1		/******************************************************************************
2		*
3		* Project: GDAL Core
4		* Purpose: Implementation of GDALNoDataMaskBand, a class implementing all
5		* a default band mask based on nodata values.
6		* Author: Frank Warmerdam, warmerdam@pobox.com
7		*
8		******************************************************************************
9		* Copyright (c) 2007, Frank Warmerdam
10		* Copyright (c) 2008-2012, Even Rouault <even dot rouault at spatialys.com>
11		*
12		* SPDX-License-Identifier: MIT
13		****************************************************************************/
14
15		#include "cpl_port.h"
16		#include "gdal_priv.h"
17
18		#include <algorithm>
19		#include <cmath>
20		#include <cstring>
21		#include <utility>
22
23		#include "cpl_conv.h"
24		#include "cpl_error.h"
25		#include "cpl_vsi.h"
26		#include "gdal.h"
27		#include "gdal_priv_templates.hpp"
28
29		//! @cond Doxygen_Suppress
30		/************************************************************************/
31		/* GDALNoDataMaskBand() */
32		/************************************************************************/
33
34		GDALNoDataMaskBand::GDALNoDataMaskBand(GDALRasterBand *poParentIn)
35	0	: m_poParent(poParentIn)
36	0	{
37	0	poDS = nullptr;
38	0	nBand = 0;
39
40	0	nRasterXSize = m_poParent->GetXSize();
41	0	nRasterYSize = m_poParent->GetYSize();
42
43	0	eDataType = GDT_Byte;
44	0	m_poParent->GetBlockSize(&nBlockXSize, &nBlockYSize);
45
46	0	const auto eParentDT = m_poParent->GetRasterDataType();
47	0	if (eParentDT == GDT_Int64)
48	0	m_nNoDataValueInt64 = m_poParent->GetNoDataValueAsInt64();
49	0	else if (eParentDT == GDT_UInt64)
50	0	m_nNoDataValueUInt64 = m_poParent->GetNoDataValueAsUInt64();
51	0	else
52	0	m_dfNoDataValue = m_poParent->GetNoDataValue();
53	0	}
54
55		/************************************************************************/
56		/* GDALNoDataMaskBand() */
57		/************************************************************************/
58
59		GDALNoDataMaskBand::GDALNoDataMaskBand(GDALRasterBand *poParentIn,
60		double dfNoDataValue)
61	0	: m_poParent(poParentIn)
62	0	{
63	0	poDS = nullptr;
64	0	nBand = 0;
65
66	0	nRasterXSize = m_poParent->GetXSize();
67	0	nRasterYSize = m_poParent->GetYSize();
68
69	0	eDataType = GDT_Byte;
70	0	m_poParent->GetBlockSize(&nBlockXSize, &nBlockYSize);
71
72	0	const auto eParentDT = m_poParent->GetRasterDataType();
73	0	if (eParentDT == GDT_Int64)
74	0	m_nNoDataValueInt64 = static_cast<int64_t>(dfNoDataValue);
75	0	else if (eParentDT == GDT_UInt64)
76	0	m_nNoDataValueUInt64 = static_cast<uint64_t>(dfNoDataValue);
77	0	else
78	0	m_dfNoDataValue = dfNoDataValue;
79	0	}
80
81		/************************************************************************/
82		/* ~GDALNoDataMaskBand() */
83		/************************************************************************/
84
85	0	GDALNoDataMaskBand::~GDALNoDataMaskBand() = default;
86
87		/************************************************************************/
88		/* GetWorkDataType() */
89		/************************************************************************/
90
91		static GDALDataType GetWorkDataType(GDALDataType eDataType)
92	0	{
93	0	GDALDataType eWrkDT = GDT_Unknown;
94	0	switch (eDataType)
95	0	{
96	0	case GDT_Byte:
97	0	eWrkDT = GDT_Byte;
98	0	break;
99
100	0	case GDT_Int16:
101	0	eWrkDT = GDT_Int16;
102	0	break;
103
104	0	case GDT_UInt16:
105	0	eWrkDT = GDT_UInt16;
106	0	break;
107
108	0	case GDT_UInt32:
109	0	eWrkDT = GDT_UInt32;
110	0	break;
111
112	0	case GDT_Int8:
113	0	case GDT_Int32:
114	0	case GDT_CInt16:
115	0	case GDT_CInt32:
116	0	eWrkDT = GDT_Int32;
117	0	break;
118
119	0	case GDT_Float16:
120	0	case GDT_CFloat16:
121	0	case GDT_Float32:
122	0	case GDT_CFloat32:
123	0	eWrkDT = GDT_Float32;
124	0	break;
125
126	0	case GDT_Float64:
127	0	case GDT_CFloat64:
128	0	eWrkDT = GDT_Float64;
129	0	break;
130
131	0	case GDT_Int64:
132	0	case GDT_UInt64:
133	0	eWrkDT = eDataType;
134	0	break;
135
136	0	case GDT_Unknown:
137	0	case GDT_TypeCount:
138	0	CPLAssert(false);
139	0	eWrkDT = GDT_Float64;
140	0	break;
141	0	}
142	0	return eWrkDT;
143	0	}
144
145		/************************************************************************/
146		/* IsNoDataInRange() */
147		/************************************************************************/
148
149		bool GDALNoDataMaskBand::IsNoDataInRange(double dfNoDataValue,
150		GDALDataType eDataTypeIn)
151	0	{
152	0	GDALDataType eWrkDT = GetWorkDataType(eDataTypeIn);
153	0	switch (eWrkDT)
154	0	{
155	0	case GDT_Byte:
156	0	{
157	0	return GDALIsValueInRange<GByte>(dfNoDataValue);
158	0	}
159
160	0	case GDT_Int16:
161	0	{
162	0	return GDALIsValueInRange<GInt16>(dfNoDataValue);
163	0	}
164
165	0	case GDT_UInt16:
166	0	{
167	0	return GDALIsValueInRange<GUInt16>(dfNoDataValue);
168	0	}
169
170	0	case GDT_UInt32:
171	0	{
172	0	return GDALIsValueInRange<GUInt32>(dfNoDataValue);
173	0	}
174	0	case GDT_Int32:
175	0	{
176	0	return GDALIsValueInRange<GInt32>(dfNoDataValue);
177	0	}
178
179	0	case GDT_UInt64:
180	0	{
181	0	return GDALIsValueInRange<uint64_t>(dfNoDataValue);
182	0	}
183
184	0	case GDT_Int64:
185	0	{
186	0	return GDALIsValueInRange<int64_t>(dfNoDataValue);
187	0	}
188
189	0	case GDT_Float16:
190	0	{
191	0	return std::isnan(dfNoDataValue) \|\| std::isinf(dfNoDataValue) \|\|
192	0	GDALIsValueInRange<GFloat16>(dfNoDataValue);
193	0	}
194
195	0	case GDT_Float32:
196	0	{
197	0	return std::isnan(dfNoDataValue) \|\| std::isinf(dfNoDataValue) \|\|
198	0	GDALIsValueInRange<float>(dfNoDataValue);
199	0	}
200
201	0	case GDT_Float64:
202	0	{
203	0	return true;
204	0	}
205
206	0	default:
207	0	CPLAssert(false);
208	0	return false;
209	0	}
210	0	}
211
212		/************************************************************************/
213		/* IReadBlock() */
214		/************************************************************************/
215
216		CPLErr GDALNoDataMaskBand::IReadBlock(int nXBlockOff, int nYBlockOff,
217		void *pImage)
218
219	0	{
220	0	const int nXOff = nXBlockOff * nBlockXSize;
221	0	const int nXSizeRequest = std::min(nBlockXSize, nRasterXSize - nXOff);
222	0	const int nYOff = nYBlockOff * nBlockYSize;
223	0	const int nYSizeRequest = std::min(nBlockYSize, nRasterYSize - nYOff);
224
225	0	if (nBlockXSize != nXSizeRequest \|\| nBlockYSize != nYSizeRequest)
226	0	{
227	0	memset(pImage, 0, static_cast<GPtrDiff_t>(nBlockXSize) * nBlockYSize);
228	0	}
229
230	0	GDALRasterIOExtraArg sExtraArg;
231	0	INIT_RASTERIO_EXTRA_ARG(sExtraArg);
232	0	return IRasterIO(GF_Read, nXOff, nYOff, nXSizeRequest, nYSizeRequest,
233	0	pImage, nXSizeRequest, nYSizeRequest, GDT_Byte, 1,
234	0	nBlockXSize, &sExtraArg);
235	0	}
236
237		/************************************************************************/
238		/* SetZeroOr255() */
239		/************************************************************************/
240
241		#if (defined(__GNUC__) && !defined(__clang__))
242		__attribute__((optimize("tree-vectorize")))
243		#endif
244		static void
245		SetZeroOr255(GByte *pabyDestAndSrc, size_t nBufSize, GByte byNoData)
246	0	{
247	0	for (size_t i = 0; i < nBufSize; ++i)
248	0	{
249	0	pabyDestAndSrc[i] = (pabyDestAndSrc[i] == byNoData) ? 0 : 255;
250	0	}
251	0	}
252
253		template <class T>
254		#if (defined(__GNUC__) && !defined(__clang__))
255		__attribute__((optimize("tree-vectorize")))
256		#endif
257		static void
258		SetZeroOr255(GByte pabyDest, const T panSrc, size_t nBufSize, T nNoData)
259	0	{
260	0	for (size_t i = 0; i < nBufSize; ++i)
261	0	{
262	0	pabyDest[i] = (panSrc[i] == nNoData) ? 0 : 255;
263	0	}
264	0	} Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<unsigned char>(unsigned char, unsigned char const, unsigned long, unsigned char) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<short>(unsigned char, short const, unsigned long, short) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<unsigned short>(unsigned char, unsigned short const, unsigned long, unsigned short) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<unsigned int>(unsigned char, unsigned int const, unsigned long, unsigned int) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<int>(unsigned char, int const, unsigned long, int) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<long>(unsigned char, long const, unsigned long, long) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<unsigned long>(unsigned char, unsigned long const, unsigned long, unsigned long)
265
266		template <class T>
267		static void SetZeroOr255(GByte pabyDest, const T panSrc, int nBufXSize,
268		int nBufYSize, GSpacing nPixelSpace,
269		GSpacing nLineSpace, T nNoData)
270	0	{
271	0	if (nPixelSpace == 1 && nLineSpace == nBufXSize)
272	0	{
273	0	const size_t nBufSize = static_cast<size_t>(nBufXSize) * nBufYSize;
274	0	SetZeroOr255(pabyDest, panSrc, nBufSize, nNoData);
275	0	}
276	0	else if (nPixelSpace == 1)
277	0	{
278	0	for (int iY = 0; iY < nBufYSize; iY++)
279	0	{
280	0	SetZeroOr255(pabyDest, panSrc, nBufXSize, nNoData);
281	0	pabyDest += nLineSpace;
282	0	panSrc += nBufXSize;
283	0	}
284	0	}
285	0	else
286	0	{
287	0	size_t i = 0;
288	0	for (int iY = 0; iY < nBufYSize; iY++)
289	0	{
290	0	GByte pabyLineDest = pabyDest + iY nLineSpace;
291	0	for (int iX = 0; iX < nBufXSize; iX++)
292	0	{
293	0	*pabyLineDest = (panSrc[i] == nNoData) ? 0 : 255;
294	0	++i;
295	0	pabyLineDest += nPixelSpace;
296	0	}
297	0	}
298	0	}
299	0	} Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<unsigned char>(unsigned char, unsigned char const, int, int, long long, long long, unsigned char) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<short>(unsigned char, short const, int, int, long long, long long, short) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<unsigned short>(unsigned char, unsigned short const, int, int, long long, long long, unsigned short) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<unsigned int>(unsigned char, unsigned int const, int, int, long long, long long, unsigned int) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<int>(unsigned char, int const, int, int, long long, long long, int) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<long>(unsigned char, long const, int, int, long long, long long, long) Unexecuted instantiation: gdalnodatamaskband.cpp:void SetZeroOr255<unsigned long>(unsigned char, unsigned long const, int, int, long long, long long, unsigned long)
300
301		/************************************************************************/
302		/* IRasterIO() */
303		/************************************************************************/
304
305		CPLErr GDALNoDataMaskBand::IRasterIO(GDALRWFlag eRWFlag, int nXOff, int nYOff,
306		int nXSize, int nYSize, void *pData,
307		int nBufXSize, int nBufYSize,
308		GDALDataType eBufType,
309		GSpacing nPixelSpace, GSpacing nLineSpace,
310		GDALRasterIOExtraArg *psExtraArg)
311	0	{
312	0	if (eRWFlag != GF_Read)
313	0	{
314	0	return CE_Failure;
315	0	}
316	0	const auto eParentDT = m_poParent->GetRasterDataType();
317	0	const GDALDataType eWrkDT = GetWorkDataType(eParentDT);
318
319		// Optimization in common use case (#4488).
320		// This avoids triggering the block cache on this band, which helps
321		// reducing the global block cache consumption.
322	0	if (eBufType == GDT_Byte && eWrkDT == GDT_Byte)
323	0	{
324	0	const CPLErr eErr = m_poParent->RasterIO(
325	0	GF_Read, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize, nBufYSize,
326	0	eBufType, nPixelSpace, nLineSpace, psExtraArg);
327	0	if (eErr != CE_None)
328	0	return eErr;
329
330	0	GByte pabyData = static_cast<GByte >(pData);
331	0	const GByte byNoData = static_cast<GByte>(m_dfNoDataValue);
332
333	0	if (nPixelSpace == 1 && nLineSpace == nBufXSize)
334	0	{
335	0	const size_t nBufSize = static_cast<size_t>(nBufXSize) * nBufYSize;
336	0	SetZeroOr255(pabyData, nBufSize, byNoData);
337	0	}
338	0	else
339	0	{
340	0	SetZeroOr255(pabyData, pabyData, nBufXSize, nBufYSize, nPixelSpace,
341	0	nLineSpace, byNoData);
342	0	}
343	0	return CE_None;
344	0	}
345
346	0	const auto AllocTempBufferOrFallback =
347	0	[this, eRWFlag, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize,
348	0	nBufYSize, eBufType, nPixelSpace, nLineSpace,
349	0	psExtraArg](int nWrkDTSize) -> std::pair<CPLErr, void *>
350	0	{
351	0	auto poParentDS = m_poParent->GetDataset();
352		// Check if we must simulate a memory allocation failure
353		// Before checking the env variable, which is slightly expensive,
354		// check first for a special dataset name, which is a cheap test.
355	0	const char *pszOptVal =
356	0	poParentDS && strcmp(poParentDS->GetDescription(), "__debug__") == 0
357	0	? CPLGetConfigOption(
358	0	"GDAL_SIMUL_MEM_ALLOC_FAILURE_NODATA_MASK_BAND", "NO")
359	0	: "NO";
360	0	const bool bSimulMemAllocFailure =
361	0	EQUAL(pszOptVal, "ALWAYS") \|\|
362	0	(CPLTestBool(pszOptVal) &&
363	0	GDALMajorObject::GetMetadataItem(__func__, "__INTERNAL__") ==
364	0	nullptr);
365	0	void *pTemp = nullptr;
366	0	if (!bSimulMemAllocFailure)
367	0	{
368	0	CPLErrorStateBackuper oErrorStateBackuper(CPLQuietErrorHandler);
369	0	pTemp = VSI_MALLOC3_VERBOSE(nWrkDTSize, nBufXSize, nBufYSize);
370	0	}
371	0	if (!pTemp)
372	0	{
373	0	const bool bAllocHasAlreadyFailed =
374	0	GDALMajorObject::GetMetadataItem(__func__, "__INTERNAL__") !=
375	0	nullptr;
376	0	CPLError(bAllocHasAlreadyFailed ? CE_Failure : CE_Warning,
377	0	CPLE_OutOfMemory,
378	0	"GDALNoDataMaskBand::IRasterIO(): cannot allocate %d x %d "
379	0	"x %d bytes%s",
380	0	nBufXSize, nBufYSize, nWrkDTSize,
381	0	bAllocHasAlreadyFailed
382	0	? ""
383	0	: ". Falling back to block-based approach");
384	0	if (bAllocHasAlreadyFailed)
385	0	return std::pair(CE_Failure, nullptr);
386		// Sets a metadata item to prevent potential infinite recursion
387	0	GDALMajorObject::SetMetadataItem(__func__, "IN", "__INTERNAL__");
388	0	const CPLErr eErr = GDALRasterBand::IRasterIO(
389	0	eRWFlag, nXOff, nYOff, nXSize, nYSize, pData, nBufXSize,
390	0	nBufYSize, eBufType, nPixelSpace, nLineSpace, psExtraArg);
391	0	GDALMajorObject::SetMetadataItem(__func__, nullptr, "__INTERNAL__");
392	0	return std::pair(eErr, nullptr);
393	0	}
394	0	return std::pair(CE_None, pTemp);
395	0	};
396
397	0	if (eBufType == GDT_Byte)
398	0	{
399	0	const int nWrkDTSize = GDALGetDataTypeSizeBytes(eWrkDT);
400	0	auto [eErr, pTemp] = AllocTempBufferOrFallback(nWrkDTSize);
401	0	if (!pTemp)
402	0	return eErr;
403
404	0	eErr = m_poParent->RasterIO(
405	0	GF_Read, nXOff, nYOff, nXSize, nYSize, pTemp, nBufXSize, nBufYSize,
406	0	eWrkDT, nWrkDTSize, static_cast<GSpacing>(nBufXSize) * nWrkDTSize,
407	0	psExtraArg);
408	0	if (eErr != CE_None)
409	0	{
410	0	VSIFree(pTemp);
411	0	return eErr;
412	0	}
413
414	0	const bool bIsNoDataNan = std::isnan(m_dfNoDataValue) != 0;
415	0	GByte pabyDest = static_cast<GByte >(pData);
416
417		/* --------------------------------------------------------------------
418		*/
419		/* Process different cases. */
420		/* --------------------------------------------------------------------
421		*/
422	0	switch (eWrkDT)
423	0	{
424	0	case GDT_Int16:
425	0	{
426	0	const auto nNoData = static_cast<int16_t>(m_dfNoDataValue);
427	0	const auto panSrc = static_cast<const int16_t >(pTemp);
428	0	SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
429	0	nPixelSpace, nLineSpace, nNoData);
430	0	}
431	0	break;
432
433	0	case GDT_UInt16:
434	0	{
435	0	const auto nNoData = static_cast<uint16_t>(m_dfNoDataValue);
436	0	const auto panSrc = static_cast<const uint16_t >(pTemp);
437	0	SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
438	0	nPixelSpace, nLineSpace, nNoData);
439	0	}
440	0	break;
441
442	0	case GDT_UInt32:
443	0	{
444	0	const auto nNoData = static_cast<GUInt32>(m_dfNoDataValue);
445	0	const auto panSrc = static_cast<const GUInt32 >(pTemp);
446	0	SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
447	0	nPixelSpace, nLineSpace, nNoData);
448	0	}
449	0	break;
450
451	0	case GDT_Int32:
452	0	{
453	0	const auto nNoData = static_cast<GInt32>(m_dfNoDataValue);
454	0	const auto panSrc = static_cast<const GInt32 >(pTemp);
455	0	SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
456	0	nPixelSpace, nLineSpace, nNoData);
457	0	}
458	0	break;
459
460	0	case GDT_Float32:
461	0	{
462	0	const float fNoData = static_cast<float>(m_dfNoDataValue);
463	0	const float pafSrc = static_cast<const float >(pTemp);
464
465	0	size_t i = 0;
466	0	for (int iY = 0; iY < nBufYSize; iY++)
467	0	{
468	0	GByte pabyLineDest = pabyDest + iY nLineSpace;
469	0	for (int iX = 0; iX < nBufXSize; iX++)
470	0	{
471	0	const float fVal = pafSrc[i];
472	0	if (bIsNoDataNan && std::isnan(fVal))
473	0	*pabyLineDest = 0;
474	0	else if (ARE_REAL_EQUAL(fVal, fNoData))
475	0	*pabyLineDest = 0;
476	0	else
477	0	*pabyLineDest = 255;
478	0	++i;
479	0	pabyLineDest += nPixelSpace;
480	0	}
481	0	}
482	0	}
483	0	break;
484
485	0	case GDT_Float64:
486	0	{
487	0	const double padfSrc = static_cast<const double >(pTemp);
488
489	0	size_t i = 0;
490	0	for (int iY = 0; iY < nBufYSize; iY++)
491	0	{
492	0	GByte pabyLineDest = pabyDest + iY nLineSpace;
493	0	for (int iX = 0; iX < nBufXSize; iX++)
494	0	{
495	0	const double dfVal = padfSrc[i];
496	0	if (bIsNoDataNan && std::isnan(dfVal))
497	0	*pabyLineDest = 0;
498	0	else if (ARE_REAL_EQUAL(dfVal, m_dfNoDataValue))
499	0	*pabyLineDest = 0;
500	0	else
501	0	*pabyLineDest = 255;
502	0	++i;
503	0	pabyLineDest += nPixelSpace;
504	0	}
505	0	}
506	0	}
507	0	break;
508
509	0	case GDT_Int64:
510	0	{
511	0	const auto panSrc = static_cast<const int64_t >(pTemp);
512	0	SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
513	0	nPixelSpace, nLineSpace, m_nNoDataValueInt64);
514	0	}
515	0	break;
516
517	0	case GDT_UInt64:
518	0	{
519	0	const auto panSrc = static_cast<const uint64_t >(pTemp);
520	0	SetZeroOr255(pabyDest, panSrc, nBufXSize, nBufYSize,
521	0	nPixelSpace, nLineSpace, m_nNoDataValueUInt64);
522	0	}
523	0	break;
524
525	0	default:
526	0	CPLAssert(false);
527	0	break;
528	0	}
529
530	0	VSIFree(pTemp);
531	0	return CE_None;
532	0	}
533
534		// Output buffer is non-Byte. Ask for Byte and expand to user requested
535		// type
536	0	auto [eErr, pTemp] = AllocTempBufferOrFallback(sizeof(GByte));
537	0	if (!pTemp)
538	0	return eErr;
539
540	0	eErr = IRasterIO(eRWFlag, nXOff, nYOff, nXSize, nYSize, pTemp, nBufXSize,
541	0	nBufYSize, GDT_Byte, 1, nBufXSize, psExtraArg);
542	0	if (eErr != CE_None)
543	0	{
544	0	VSIFree(pTemp);
545	0	return eErr;
546	0	}
547
548	0	for (int iY = 0; iY < nBufYSize; iY++)
549	0	{
550	0	GDALCopyWords64(
551	0	static_cast<GByte >(pTemp) + static_cast<size_t>(iY) nBufXSize,
552	0	GDT_Byte, 1, static_cast<GByte >(pData) + iY nLineSpace,
553	0	eBufType, static_cast<int>(nPixelSpace), nBufXSize);
554	0	}
555	0	VSIFree(pTemp);
556	0	return CE_None;
557	0	}
558
559		/************************************************************************/
560		/* EmitErrorMessageIfWriteNotSupported() */
561		/************************************************************************/
562
563		bool GDALNoDataMaskBand::EmitErrorMessageIfWriteNotSupported(
564		const char *pszCaller) const
565	0	{
566	0	ReportError(CE_Failure, CPLE_NoWriteAccess,
567	0	"%s: attempt to write to a nodata implicit mask band.",
568	0	pszCaller);
569
570	0	return true;
571	0	}
572
573		//! @endcond