[Qgis-developer] Raster resampling

[Tim Sutton]

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
>
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> Qgis-developer mailing list
> Qgis-developer at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-developer



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