[Qgis-developer] Raster providers

[Radim Blazek]

Jef fixed that by qRound.
Thank you Jef and sorry for various problems I am introducing.
How do you indent the code? If I run scripts/prepare-commit.sh (which
existence I just noticed) it does too many not desired indentations.

Radim

On Thu, Mar 10, 2011 at 11:58 PM, G. Allegri <giohappy at gmail.com> wrote:
> Radim, the round() you added in qgsgdalprovider causes problems for me on
> VC++
> (http://trac.osgeo.org/qgis/browser/trunk/qgis/src/providers/gdal/qgsgdalprovider.cpp#L664).
> Should we add something like:
> #define round(dbl) dbl >= 0.0 ? (int)(dbl + 0.5) : ((dbl - (double)(int)dbl)
> <= -0.5 ? (int)dbl : (int)(dbl - 0.5))
> ?
> 2011/3/10 Radim Blazek <radim.blazek at gmail.com>
>>
>> I fact, I forgot to write a piece of logic, there is a shift.
>>
>> Radim
>>
>> On Thu, Mar 10, 2011 at 8:13 PM, Radim Blazek <radim.blazek at gmail.com>
>> wrote:
>> > I have changed how GDAL provider reads the data, it should be fast
>> > again.
>> >
>> >
>> > BUT! I am not absolutely sure that resampling is perfect and the
>> > nearest neighbour is alway nearest. I dont think however that anybody
>> > could notice that in normal work. I would appreciate however if
>> > somebody with fresh brain could check the alignment fiddling.
>> >
>> > http://trac.osgeo.org/qgis/browser/trunk/qgis/src/providers/gdal/qgsgdalprovider.cpp#L529
>> >
>> > More pointers - more crashes expected!
>> >
>> > Radim
>> >
>> >
>> > On Wed, Mar 9, 2011 at 8:30 PM, Giovanni Manghi
>> > <giovanni.manghi at gmail.com> wrote:
>> >> Hi,
>> >>
>> >> On Tue, 2011-03-08 at 20:17 +0100, Radim Blazek wrote:
>> >>> Merged to trunk.
>> >>
>> >>
>> >> I'm testing the new raster capabilities of QGIS and I would like to
>> >> have
>> >> your opinion on a certain matter before eventually filing a ticket.
>> >>
>> >> I have a bunch of big tiff rasters (> 1gb, sometimes > 2gb), with
>> >> internal tiles and/or overviews.
>> >>
>> >> What I'm seeing is that now those rasters take quite a *lot* (making
>> >> qgis not responsive for a while) to be rendered, before the merge it
>> >> was
>> >> all much quicker.
>> >>
>> >> As exemple:
>> >>
>> >> on QGIS 1.6 a 1.7gb geotiff with tiles and overviews opens in (more or
>> >> less) 1 sec., in trunk now takes (more os less) 1 minute!
>> >>
>> >>
>> >> After the raster show in the canvas, also opening its properties take a
>> >> long time. Before the merge was immediate.
>> >>
>> >> Zooming and panning it is also much slower than before the merge.
>> >>
>> >> Overall it seems like that tiles and overviews are ignored or not
>> >> read.,
>> >> but to me seems that also opening big tiffs (> 1gb) without internal
>> >> tiles and/or overviews takes a *lot* more than before the merge.
>> >>
>> >>
>> >> anyone experiencing the same?
>> >>
>> >>
>> >> cheers
>> >>
>> >> -- Giovanni --
>> >>
>> >>
>> >
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