[GRASS-dev] [GRASS GIS] #2403: cairo driver fails to create surface

[GRASS GIS]

#2403: cairo driver fails to create surface
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  Reporter:  martinl  |       Owner:  martinl                   
      Type:  defect   |      Status:  closed                    
  Priority:  major    |   Milestone:  7.0.0                     
 Component:  Display  |     Version:  unspecified               
Resolution:  fixed    |    Keywords:  cairo, resolution, surface
  Platform:  Linux    |         Cpu:  x86-64                    
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Comment(by glynn):

 Replying to [comment:11 neteler]:

 >
 {{{
 GRASS 7.0.0svn (eu_laea):~ > time -p d.rast lst_2014_03_minimum

 ##### comparison to see how long data reading itself takes:
 GRASS 7.0.0svn (eu_laea):~ > time -p r.stats lst_2014_03_minimum
 }}}

 FWIW, the comparison isn't particularly meaningful, as d.rast now only
 needs to read the rows which are actually rendered, while r.stats needs to
 read the entire map.

 Beyond the need to uncompress entire rows, the rendering time should be
 dictated by the output width, not the input width. However, d.rast's
 values= feature adds overhead proportional to the input width.

 Can you try commenting out the mask_raster_array() call at line 71 of
 display/d.rast/display.c? If that has a significant impact, we should try
 to skip that call altogether when values= isn't being used.

-- 
Ticket URL: <http://trac.osgeo.org/grass/ticket/2403#comment:12>
GRASS GIS <http://grass.osgeo.org>