<tool id="gdal_gdaladdo" name="GDAL addo" version="@VERSION@">
    <description>builds or rebuilds overview images</description>
    <macros>
        <import>gdal_macros.xml</import>
    </macros>
    <expand macro="gdal_requirements" />
    <command detect_errors="exit_code"><![CDATA[
        gdaladdo '$input1'
            -q
            -ro
            #if str($levels).strip()==''
                -clean 
            #else
                '$levels'
                --config COMPRESS_OVERVIEW DEFLATE
                && cp '$input1''.ovr' 'output_ovr'
            #end if
    ]]></command>
    
    <inputs>
        <param type="data" name="input1" label="Gdal supported raster input file" format="gtiff,tiff" help="Chose a GeoTIFF file"/>    
        <param name="levels" type="text" label="levels" help="A list of integral overview levels to build. eg : 2 4 8 16" value=""/>        
    </inputs>
    
    <outputs>
        <data format="tiff" name="output" from_work_dir="output_ovr" label="${input1.name}.ovr"/>
    </outputs>
    
    <tests> 
        <test> 
            <param name="input1" value="stere.tif"/>
            <param name="levels" value="2 4 8 16" />
            <output name="output" file="stere.tif.ovr"/>
        </test>
    </tests>
    
    <help><![CDATA[
==========================
Gdaladdo
==========================
**What it does**

The gdaladdo utility can be used to build or rebuild overview images for most supported file formats with one of several downsampling algorithms. 

|

**How to use it**        

Select a raster file from history and chose levels to build.

|

**Advanced options and sources**

To see complete details and help section please check the official gdal sources.

http://www.gdal.org

http://www.gdal.org/gdaladdo.html

Raster Processing Tutorial : https://trac.osgeo.org/gdal/wiki/UserDocs/RasterProcTutorial
    ]]></help>
    <expand macro="gdal_citation"/>
</tool>