[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
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 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                    |  
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Comment(by mlennert):

 Replying to [comment:23 mmetz]:
 > Replying to [comment:22 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)
 >
 > This has been introduced by you with r12527. Reverting r12527 removes
 the single pixel black line along both the right and bottom edges. Do you
 remember by any chance the reason for r12527?

 It's explained in the mailing list message referenced in the changelog:

 [http://grass.fbk.eu/pipermail/grass5/2004-February/013625.html]

 "I was having a look at why d.frame's boxes don't line up properly.."

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Ticket URL: <https://trac.osgeo.org/grass/ticket/72#comment:24>
GRASS GIS <http://grass.osgeo.org>