[Qgis-developer] Raster resampling

[Marco Hugentobler]

>Great stuff Marco - I hope to test your changes soon.


Thanks, Tim. The code is not 100% complete, but already testable. 
Because there are many changes, I'm expecting a large number of bugs. So 
any report about issues is greatly appreciated.

Regards,
Marco


On 10.01.2012 10:29, Tim Sutton wrote:
> Hi
>
> On Fri, Dec 30, 2011 at 3:58 PM, Marco Hugentobler
> <marco.hugentobler at sourcepole.ch>  wrote:
>> Hi devs,
>>
>> Recently, I've been working on adding raster resampling to QGIS raster
>> (http://www.sourcepole.com/raster-resampling-in-qgis). The changes are in
>> the branch 'raster_resampler' of my github clone
>> (git://github.com/mhugent/Quantum-GIS.git).
>>
>> To add resampling in a clean way, I started a bit of refactoring within
>> QgsRasterLayer:
>>
>> - The new abstract class QgsRasterRenderer is added to replace the
>> drawingType switch. The method QgsRasterRenderer::draw() is a replacement
>> for the methods drawMultiBandColor(), drawMultiBandSingleBandGray(),
>> drawPalettedSingleBandColor(). This should move a lot of code out of
>> QgsRasterLayer and reduce code complexity. Currently implemented are
>> QgsPallettedRasterRenderer, QgsMultibandColorRenderer,
>> QgsSingleBandGrayRenderer
>> - The functionality of QgsRasterBuffer to draw the raster layer in several
>> parts is moved to QgsRasterRenderer base class (same idea of reducing
>> complexity in QgsRasterLayer).
>> - QgsRasterResampler has two subclasses for now, QgsBilinearRasterResampler
>> and QgsCubicRasterResampler (maybe average would be useful as well?)
>>
>> Any objections or suggestions about this? The code in the branch is mostly
>> working, but far from being complete.
>> I'm going to be without internet connection the next few days, but hope to
>> get the code to a testable state soon.
>>
>> Regards,
>> Marco
>>
> Great stuff Marco - I hope to test your changes soon.
>
> Regards
>
> Tim
>
>> --
>> Dr. Marco Hugentobler
>> Sourcepole -  Linux&    Open Source Solutions
>> Churerstrasse 22, CH-8808 Pfäffikon SZ, Switzerland
>> marco.hugentobler at sourcepole.ch http://www.sourcepole.ch
>> Technical Advisor QGIS Project Steering Committee
>>
>> _______________________________________________
>> Qgis-developer mailing list
>> Qgis-developer at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>
>


-- 
Dr. Marco Hugentobler
Sourcepole -  Linux&  Open Source Solutions
Churerstrasse 22, CH-8808 Pfäffikon SZ, Switzerland
marco.hugentobler at sourcepole.ch http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee