Line data    Source code

       1             : /******************************************************************************
       2             :  *
       3             :  * Purpose:  Implementation of the PCIDSKInterfaces class.
       4             :  *
       5             :  ******************************************************************************
       6             :  * Copyright (c) 2009
       7             :  * PCI Geomatics, 90 Allstate Parkway, Markham, Ontario, Canada.
       8             :  *
       9             :  * SPDX-License-Identifier: MIT
      10             :  ****************************************************************************/
      11             : 
      12             : #include "pcidsk_config.h"
      13             : #include "pcidsk_types.h"
      14             : #include "pcidsk_utils.h"
      15             : #include "pcidsk_interfaces.h"
      16             : #include "pcidsk_mutex.h"
      17             : #include "core/pcidsk_utils.h"
      18             : 
      19             : using namespace PCIDSK;
      20             : 
      21             : /************************************************************************/
      22             : /*                          PCIDSKInterfaces()                          */
      23             : /*                                                                      */
      24             : /*      This constructor just defaults all the interfaces and           */
      25             : /*      functions to the default implementation.                        */
      26             : /************************************************************************/
      27             : 
      28         641 : PCIDSKInterfaces::PCIDSKInterfaces()
      29             : 
      30             : {
      31         641 :     io = GetDefaultIOInterfaces();
      32         641 :     OpenEDB = DefaultOpenEDB;
      33         641 :     MergeRelativePath = DefaultMergeRelativePath;
      34         641 :     CreateMutex = DefaultCreateMutex;
      35         641 :     Debug = DefaultDebug;
      36             : 
      37             : #if defined(HAVE_LIBJPEG)
      38         641 :     JPEGDecompressBlock = LibJPEG_DecompressBlock;
      39         641 :     JPEGCompressBlock = LibJPEG_CompressBlock;
      40             : #else
      41             :     JPEGDecompressBlock = NULL;
      42             :     JPEGCompressBlock = NULL;
      43             : #endif
      44         641 : }
      45             : 
      46             : /**
      47             : 
      48             : \var const IOInterfaces *PCIDSKInterfaces::io;
      49             : 
      50             : \brief Pointer to IO Interfaces.
      51             : 
      52             : ***************************************************************************/
      53             : 
      54             : /**
      55             : 
      56             : \var Mutex *(*PCIDSKInterfaces::CreateMutex)(void);
      57             : 
      58             : \brief Function to create a mutex
      59             : 
      60             : ***************************************************************************/
      61             : 
      62             : /**
      63             : 
      64             : \var void (*PCIDSKInterfaces::JPEGDecompressBlock)(uint8 *src_data, int src_bytes, uint8 *dst_data, int dst_bytes, int xsize, int ysize, eChanType pixel_type);
      65             : 
      66             : \brief Function to decompress a jpeg block
      67             : 
      68             : This function may be NULL if there is no jpeg interface available.
      69             : 
      70             : The default implementation is implemented using libjpeg.
      71             : 
      72             : The function decodes the jpeg compressed image in src_data (src_bytes long)
      73             : into dst_data (dst_bytes long) as image data.  The result should be exactly
      74             : dst_bytes long, and will be an image of xsize x ysize of type pixel_type
      75             : (currently on CHN_8U is allowed).
      76             : 
      77             : Errors should be thrown as exceptions.
      78             : 
      79             : ***************************************************************************/
      80             : 
      81             : /**
      82             : 
      83             : \var void (*PCIDSKInterfaces::JPEGCompressBlock)(uint8 *src_data, int src_bytes, uint8 *dst_data, int &dst_bytes, int xsize, int ysize, eChanType pixel_type);
      84             : 
      85             : \brief Function to compress a jpeg block
      86             : 
      87             : This function may be NULL if there is no jpeg interface available.
      88             : 
      89             : The default implementation is implemented using libjpeg.
      90             : 
      91             : The function encodes the image in src_data (src_bytes long)
      92             : into dst_data as compressed jpeg data.  The passed in value of dst_bytes is the
      93             : size of the passed in dst_data array (it should be large enough to hold
      94             : any compressed result0 and dst_bytes will be returned with the resulting
      95             : actual number of bytes used.
      96             : 
      97             : Errors should be thrown as exceptions.
      98             : 
      99             : ***************************************************************************/
     100             :