[GRASS-dev] Re: [GRASS GIS] #885: WinGrass: displaying r.external-linked raster data not working

[GRASS GIS]

#885: WinGrass: displaying r.external-linked raster data not working
------------------------------+---------------------------------------------
  Reporter:  hellik           |       Owner:  grass-dev at lists.osgeo.org
      Type:  defect           |      Status:  new                      
  Priority:  critical         |   Milestone:  6.4.0                    
 Component:  Display          |     Version:  svn-releasebranch64      
Resolution:                   |    Keywords:  r.external, WinGrass     
  Platform:  MSWindows Vista  |         Cpu:  x86-32                   
------------------------------+---------------------------------------------
Comment (by glynn):

 Replying to [comment:10 neteler]:

 > Done so - see attached diff. I am now stuck with these compile error:
 {{{
 gdal.c: In function ‘G_create_gdal_link’:
 gdal.c:366: warning: implicit declaration of function ‘G__init’
 gdal.c:393: error: ‘struct G__’ has no member named ‘nbytes’
 }}}

 `R__init()` is the equivalent of `G__gisinit()` for the raster library; it
 shouldn't be necessary in 6.x.

 The 6.x equivalent of `R__.nbytes` is the static variable NBYTES in
 opencell.c, which is set by `G_set_cell_format()`. In 6.x, it isn't
 possible to get at this setting from gdal.c.

 I'd suggest sync'ing any changes to the functions which are already in 6.x
 (i.e. `G_get_gdal_link()`, `G_close_gdal_link()`, and
 `G_gdal_raster_IO()`) to ensure that linked maps are compatible between
 the two versions, and not bothering about the write support (which won't
 work without also sync'ing the corresponding changes to `G_open_*_new()`
 and `G_put_*_row()`, which is probably unrealistic given the divergence
 between 6.x and 7.0 in the raster code).

-- 
Ticket URL: <http://trac.osgeo.org/grass/ticket/885#comment:12>
GRASS GIS <http://grass.osgeo.org>