1                 : /******************************************************************************
       2                 :  * $Id: gdalallvalidmaskband.cpp 15044 2008-07-26 12:04:05Z rouault $
       3                 :  *
       4                 :  * Project:  GDAL Core
       5                 :  * Purpose:  Implementation of GDALAllValidMaskBand, a class implementing all
       6                 :  *           a default 'all valid' band mask.
       7                 :  * Author:   Frank Warmerdam, warmerdam@pobox.com
       8                 :  *
       9                 :  ******************************************************************************
      10                 :  * Copyright (c) 2007, Frank Warmerdam
      11                 :  *
      12                 :  * Permission is hereby granted, free of charge, to any person obtaining a
      13                 :  * copy of this software and associated documentation files (the "Software"),
      14                 :  * to deal in the Software without restriction, including without limitation
      15                 :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      16                 :  * and/or sell copies of the Software, and to permit persons to whom the
      17                 :  * Software is furnished to do so, subject to the following conditions:
      18                 :  *
      19                 :  * The above copyright notice and this permission notice shall be included
      20                 :  * in all copies or substantial portions of the Software.
      21                 :  *
      22                 :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      23                 :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      24                 :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      25                 :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      26                 :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      27                 :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      28                 :  * DEALINGS IN THE SOFTWARE.
      29                 :  ****************************************************************************/
      30                 : 
      31                 : #include "gdal_priv.h"
      32                 : 
      33                 : CPL_CVSID("$Id: gdalallvalidmaskband.cpp 15044 2008-07-26 12:04:05Z rouault $");
      34                 : 
      35                 : /************************************************************************/
      36                 : /*                        GDALAllValidMaskBand()                        */
      37                 : /************************************************************************/
      38                 : 
      39             440 : GDALAllValidMaskBand::GDALAllValidMaskBand( GDALRasterBand *poParent )
      40                 : 
      41                 : {
      42             440 :     poDS = NULL;
      43             440 :     nBand = 0;
      44                 : 
      45             440 :     nRasterXSize = poParent->GetXSize();
      46             440 :     nRasterYSize = poParent->GetYSize();
      47                 : 
      48             440 :     eDataType = GDT_Byte;
      49             440 :     poParent->GetBlockSize( &nBlockXSize, &nBlockYSize );
      50             440 : }
      51                 : 
      52                 : /************************************************************************/
      53                 : /*                       ~GDALAllValidMaskBand()                        */
      54                 : /************************************************************************/
      55                 : 
      56             440 : GDALAllValidMaskBand::~GDALAllValidMaskBand()
      57                 : 
      58                 : {
      59             440 : }
      60                 : 
      61                 : /************************************************************************/
      62                 : /*                             IReadBlock()                             */
      63                 : /************************************************************************/
      64                 : 
      65                 : CPLErr GDALAllValidMaskBand::IReadBlock( int nXBlockOff, int nYBlockOff,
      66             153 :                                          void * pImage )
      67                 : 
      68                 : {
      69             153 :     memset( pImage, 255, nBlockXSize * nBlockYSize );
      70                 : 
      71             153 :     return CE_None;
      72                 : }
      73                 : 
      74                 : /************************************************************************/
      75                 : /*                            GetMaskBand()                             */
      76                 : /************************************************************************/
      77                 : 
      78               0 : GDALRasterBand *GDALAllValidMaskBand::GetMaskBand()
      79                 : 
      80                 : {
      81               0 :     return this;
      82                 : }
      83                 : 
      84                 : /************************************************************************/
      85                 : /*                            GetMaskFlags()                            */
      86                 : /************************************************************************/
      87                 : 
      88               0 : int GDALAllValidMaskBand::GetMaskFlags()
      89                 : 
      90                 : {
      91               0 :     return GMF_ALL_VALID;
      92                 : }