Line data    Source code

       1             : /******************************************************************************
       2             :  *
       3             :  * Project:  GeoTIFF Driver
       4             :  * Purpose:  GDAL GeoTIFF support.
       5             :  * Author:   Frank Warmerdam, warmerdam@pobox.com
       6             :  *
       7             :  ******************************************************************************
       8             :  * Copyright (c) 1998, 2002, Frank Warmerdam <warmerdam@pobox.com>
       9             :  * Copyright (c) 2007-2015, Even Rouault <even dot rouault at spatialys dot com>
      10             :  *
      11             :  * Permission is hereby granted, free of charge, to any person obtaining a
      12             :  * copy of this software and associated documentation files (the "Software"),
      13             :  * to deal in the Software without restriction, including without limitation
      14             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      15             :  * and/or sell copies of the Software, and to permit persons to whom the
      16             :  * Software is furnished to do so, subject to the following conditions:
      17             :  *
      18             :  * The above copyright notice and this permission notice shall be included
      19             :  * in all copies or substantial portions of the Software.
      20             :  *
      21             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      22             :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      23             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      24             :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      25             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      26             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      27             :  * DEALINGS IN THE SOFTWARE.
      28             :  ****************************************************************************/
      29             : 
      30             : #include "gtiffsplitbitmapband.h"
      31             : 
      32             : #include "gtiffdataset.h"
      33             : 
      34             : #include "cpl_error_internal.h"
      35             : 
      36             : /************************************************************************/
      37             : /*                       GTiffSplitBitmapBand()                         */
      38             : /************************************************************************/
      39             : 
      40          10 : GTiffSplitBitmapBand::GTiffSplitBitmapBand(GTiffDataset *poDSIn, int nBandIn)
      41          10 :     : GTiffBitmapBand(poDSIn, nBandIn)
      42             : 
      43             : {
      44          10 :     nBlockXSize = poDS->GetRasterXSize();
      45          10 :     nBlockYSize = 1;
      46          10 : }
      47             : 
      48             : /************************************************************************/
      49             : /*                      ~GTiffSplitBitmapBand()                         */
      50             : /************************************************************************/
      51             : 
      52          20 : GTiffSplitBitmapBand::~GTiffSplitBitmapBand()
      53             : {
      54          20 : }
      55             : 
      56             : /************************************************************************/
      57             : /*                       IGetDataCoverageStatus()                       */
      58             : /************************************************************************/
      59             : 
      60           0 : int GTiffSplitBitmapBand::IGetDataCoverageStatus(int, int, int, int, int,
      61             :                                                  double *)
      62             : {
      63             :     return GDAL_DATA_COVERAGE_STATUS_UNIMPLEMENTED |
      64           0 :            GDAL_DATA_COVERAGE_STATUS_DATA;
      65             : }
      66             : 
      67             : /************************************************************************/
      68             : /*                             IReadBlock()                             */
      69             : /************************************************************************/
      70             : 
      71       23837 : CPLErr GTiffSplitBitmapBand::IReadBlock(int /* nBlockXOff */, int nBlockYOff,
      72             :                                         void *pImage)
      73             : 
      74             : {
      75       23837 :     m_poGDS->Crystalize();
      76             : 
      77       23837 :     if (m_nLastLineValid >= 0 && nBlockYOff > m_nLastLineValid)
      78           0 :         return CE_Failure;
      79             : 
      80       23837 :     if (m_poGDS->m_pabyBlockBuf == nullptr)
      81             :     {
      82          14 :         m_poGDS->m_pabyBlockBuf = static_cast<GByte *>(
      83           7 :             VSI_MALLOC_VERBOSE(TIFFScanlineSize(m_poGDS->m_hTIFF)));
      84           7 :         if (m_poGDS->m_pabyBlockBuf == nullptr)
      85             :         {
      86           0 :             return CE_Failure;
      87             :         }
      88             :     }
      89             : 
      90             :     /* -------------------------------------------------------------------- */
      91             :     /*      Read through to target scanline.                                */
      92             :     /* -------------------------------------------------------------------- */
      93       23837 :     if (m_poGDS->m_nLoadedBlock >= nBlockYOff)
      94           0 :         m_poGDS->m_nLoadedBlock = -1;
      95             : 
      96             :     // Set to 1 to allow GTiffErrorHandler to implement limitation on error
      97             :     // messages
      98       23837 :     GTIFFGetThreadLocalLibtiffError() = 1;
      99       47671 :     while (m_poGDS->m_nLoadedBlock < nBlockYOff)
     100             :     {
     101       23837 :         ++m_poGDS->m_nLoadedBlock;
     102             : 
     103       23837 :         std::vector<CPLErrorHandlerAccumulatorStruct> aoErrors;
     104       23837 :         CPLInstallErrorHandlerAccumulator(aoErrors);
     105       47674 :         int nRet = TIFFReadScanline(m_poGDS->m_hTIFF, m_poGDS->m_pabyBlockBuf,
     106       23837 :                                     m_poGDS->m_nLoadedBlock, 0);
     107       23837 :         CPLUninstallErrorHandlerAccumulator();
     108             : 
     109       24051 :         for (size_t iError = 0; iError < aoErrors.size(); ++iError)
     110             :         {
     111         214 :             ReportError(aoErrors[iError].type, aoErrors[iError].no, "%s",
     112         214 :                         aoErrors[iError].msg.c_str());
     113             :             // FAX decoding only handles EOF condition as a warning, so
     114             :             // catch it so as to turn on error when attempting to read
     115             :             // following lines, to avoid performance issues.
     116         428 :             if (!m_poGDS->m_bIgnoreReadErrors &&
     117         214 :                 aoErrors[iError].msg.find("Premature EOF") != std::string::npos)
     118             :             {
     119           0 :                 m_nLastLineValid = nBlockYOff;
     120           0 :                 nRet = -1;
     121             :             }
     122             :         }
     123             : 
     124       23837 :         if (nRet == -1 && !m_poGDS->m_bIgnoreReadErrors)
     125             :         {
     126           3 :             ReportError(CE_Failure, CPLE_AppDefined,
     127             :                         "TIFFReadScanline() failed.");
     128           3 :             m_poGDS->m_nLoadedBlock = -1;
     129           3 :             GTIFFGetThreadLocalLibtiffError() = 0;
     130           3 :             return CE_Failure;
     131             :         }
     132             :     }
     133       23834 :     GTIFFGetThreadLocalLibtiffError() = 0;
     134             : 
     135             :     /* -------------------------------------------------------------------- */
     136             :     /*      Translate 1bit data to eight bit.                               */
     137             :     /* -------------------------------------------------------------------- */
     138       23834 :     int iSrcOffset = 0;
     139       23834 :     int iDstOffset = 0;
     140             : 
     141    21647500 :     for (int iPixel = 0; iPixel < nBlockXSize; ++iPixel, ++iSrcOffset)
     142             :     {
     143    21623700 :         if (m_poGDS->m_pabyBlockBuf[iSrcOffset >> 3] &
     144    21623700 :             (0x80 >> (iSrcOffset & 0x7)))
     145    21262600 :             static_cast<GByte *>(pImage)[iDstOffset++] = 1;
     146             :         else
     147      361064 :             static_cast<GByte *>(pImage)[iDstOffset++] = 0;
     148             :     }
     149             : 
     150       23834 :     return CE_None;
     151             : }
     152             : 
     153             : /************************************************************************/
     154             : /*                            IWriteBlock()                             */
     155             : /************************************************************************/
     156             : 
     157           0 : CPLErr GTiffSplitBitmapBand::IWriteBlock(int /* nBlockXOff */,
     158             :                                          int /* nBlockYOff */,
     159             :                                          void * /* pImage */)
     160             : 
     161             : {
     162           0 :     ReportError(CE_Failure, CPLE_AppDefined,
     163             :                 "Split bitmap bands are read-only.");
     164           0 :     return CE_Failure;
     165             : }