[GRASS-dev] [GRASS GIS] #72: PNG driver: boundary rendering is off by one pixel

[GRASS GIS]

#72: PNG driver: boundary rendering is off by one pixel
-------------------------------------------+--------------------------------
 Reporter:  hamish                         |       Owner:  grass-dev@…              
     Type:  defect                         |      Status:  new                      
 Priority:  critical                       |   Milestone:  6.4.4                    
Component:  Default                        |     Version:  svn-develbranch6         
 Keywords:  d.vect, rendering, PNG_DRIVER  |    Platform:  Unspecified              
      Cpu:  Unspecified                    |  
-------------------------------------------+--------------------------------

Comment(by hamish):

 Hi,

 there is a similar off-by-one problem in the Cairo driver for 6.4 and 6.5,
 very easy to reproduce:

 {{{
 export GRASS_WIDTH=100
 export GRASS_HEIGHT=100
 d.mon start=cairo
 d.mon stop=cairo
 }}}

 you will see a single pixel black line along both the right and bottom
 edges of the resulting map.png file. (trouble if you wanted to use
 GRASS_TRANSPARENT=TRUE)

 crummy work-around is to make GRASS_WIDTH and HEIGHT one larger, then crop
 away the bad edges with pnmcrop.


 Hamish

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/72#comment:22>
GRASS GIS <http://grass.osgeo.org>