[QGIS-trac] Re: [Quantum GIS] #2038: Incremental rendering of features does not working when render cache is used

[Quantum GIS]

#2038: Incremental rendering of features does not working when render cache is
used
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        Reporter:  jpalmer                           |         Owner:  nobody       
            Type:  bug                               |        Status:  new          
        Priority:  major: does not work as expected  |     Milestone:  Version 1.5.0
       Component:  MapCanvas                         |       Version:  HEAD         
      Resolution:                                    |      Keywords:               
Platform_version:  WinXP SP2                         |      Platform:  All          
        Must_fix:  Yes                               |   Status_info:  0            
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Comment (by smizuno):

 Actually, it is partially working on the initial rendering - after a layer
 is drawn, it is displayed. This appears to be an unintended consequence.

 However, the point of caching is to speed up redrawing the map if it is
 not necessary to re-render a layer, as when a layer is disabled/enabled
 for view and the extent hasn't changed, so I don't see a reason for
 incremental drawing at all.

 I would recommend when render caching is enabled, incremental drawing not
 be used during rendering and be disabled in Settings|Options to indicate
 that it is not available.

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Ticket URL: <http://trac.osgeo.org/qgis/ticket/2038#comment:3>
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