[Qgis-user] Serious bug returns to Qgis revision 13878

[Greg Coats]

John, Thanks for this comforting update. Greg

On Jul 8, 2010, at 2:50 PM, John C. Tull wrote:

> It appears that there was some corruption in my qgis preferences file. Deleting those seems to have fixed this problem.
> 
> On Jul 8, 2010, at 9:57 AM, John C. Tull wrote:
> 
>> An unfortunate side-effect of the most recent change is seg-faulting on existing qgis projects. Any thoughts on how to get around this? I would gladly hand-edit my xml project file if necessary.
>> 
>> Cheers,
>> John
>> 
>> On Jul 8, 2010, at 4:12 AM, Marco Hugentobler wrote:
>> 
>>> Hi William
>>> 
>>> It is disabled now (r13899).
>>> Let me know if you find out more (or some conditions when the icon can be 
>>> savely enabled).
>>> 
>>> Regards,
>>> Marco
>>> 
>>> Am Dienstag, 6. Juli 2010, um 17.17:55 schrieb William Kyngesburye:
>>>> For release, maybe disble it, and work on a solution for 1.6?
>>>> 
>>>> A note about the raster format - I wonder if it only affects rasters
>>>> without overviews.  For the vrts in Greg's test, though the files
>>>> referenced in the vrts are JP2s, does a vrt inherit the overviews?  I did
>>>> a test with a single 1 GiB JP2 and it generates the legend icon nearly
>>>> instantaneously.  A 1.3 GiB tiff without overviews takes a long time, yet
>>>> the same with overviews is fast.  A 200MiB tiff without overviews has a
>>>> noticable delay, but it's not horrible.
>>>> 
>>>> Though, Greg's test vrts are quite small, just 14MiB across 4 vrts.  Maybe
>>>> there's something else with a vrt that slows down the legend generation? 
>>>> Zooming and panning are not affected.
>>>> 
>>>> On Jul 6, 2010, at 4:21 AM, Marco Hugentobler wrote:
>>>>>> (a raster scaled down to 16x16 pixels usually
>>>>>> doesn't provide a good overview)
>>>>> 
>>>>> I made a little self-test here and it was quite easy to distinguish
>>>>> different topographic map sheets by their legend icons (even if they
>>>>> have exactly the same color schema).
>>>>> 
>>>>> Regards,
>>>>> Marco
>>>>> 
>>>>> Am Dienstag, 6. Juli 2010, um 10.26:10 schrieb Martin Dobias:
>>>>>> Hi
>>>>>> 
>>>>>> On Tue, Jul 6, 2010 at 8:35 AM, Marco Hugentobler
>>>>>> 
>>>>>> <marco.hugentobler at sourcepole.ch> wrote:
>>>>>>> Hi William
>>>>>>> 
>>>>>>> Ah, good to know it is the icon generation that makes loading projects
>>>>>>> with many raster layers slow.
>>>>>>> 
>>>>>>> Making a user option to disable layer icons sounds good. However, this
>>>>>>> would involve a string change (option dialog). String freeze for 1.5 is
>>>>>>> already over for a while now. So (unless there is a better solution for
>>>>>>> the problem without string change) something for 1.6...
>>>>>> 
>>>>>> in my opinion, we could actually remove this feature. I don't find it
>>>>>> particularly useful (a raster scaled down to 16x16 pixels usually
>>>>>> doesn't provide a good overview), it adds additional overhead when the
>>>>>> raster layer is loaded and further complicates the complex raster
>>>>>> code. Another argument could be that vector layer also don't have an
>>>>>> icon containing the preview.
>>>>>> 
>>>>>> I'm just afraid of creating too many configurable options that barely
>>>>>> anyone will understand their purpose.
>>>>>> 
>>>>>> Regards
>>>>>> Martin
>>>> 
>>>> -----
>>>> William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
>>>> http://www.kyngchaos.com/
>>>> 
>>>> "I ache, therefore I am.  Or in my case - I am, therefore I ache."
>>>> 
>>>> - Marvin
>>> 
>>> 
>>> -- 
>>> Dr. Marco Hugentobler
>>> Sourcepole -  Linux & Open Source Solutions
>>> Webereistrasse 66, 8134 Adliswil, Switzerland
>>> marco.hugentobler at sourcepole.ch http://www.sourcepole.ch
>>> Technical Advisor QGIS Project Steering Committee
>>> _______________________________________________
>>> Qgis-user mailing list
>>> Qgis-user at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>> 
> 
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