[Geotools-commits] svn - r36224 - in branches/2.6.x/modules/library/coverage: . src/main/java/org/geotools/coverage/grid/io

[<svn...@os...>]

Author: aaime
Date: 2010-09-24 16:01:38 +0000 (Fri, 24 Sep 2010)
New Revision: 36224

Modified:
   branches/2.6.x/modules/library/coverage/
   branches/2.6.x/modules/library/coverage/src/main/java/org/geotools/coverage/grid/io/AbstractGridCoverage2DReader.java
Log:
 Adding a tool to estimate the actual resolution used when reading images with overviews


Property changes on: branches/2.6.x/modules/library/coverage
___________________________________________________________________
Added: svn:mergeinfo
   + /branches/2.5.x/modules/library/coverage:33601,33614,33682,33788
/branches/2.5.x/modules/library/main/coverage:33331
/trunk/modules/library/coverage:34359,34367-34368,34435,34437,34439,34469-34514,34530,34541,34561,35504,35583,35734,35736,35744,35761-35769,36223

Modified: branches/2.6.x/modules/library/coverage/src/main/java/org/geotools/coverage/grid/io/AbstractGridCoverage2DReader.java
===================================================================
--- branches/2.6.x/modules/library/coverage/src/main/java/org/geotools/coverage/grid/io/AbstractGridCoverage2DReader.java	2010-09-24 15:31:12 UTC (rev 36223)
+++ branches/2.6.x/modules/library/coverage/src/main/java/org/geotools/coverage/grid/io/AbstractGridCoverage2DReader.java	2010-09-24 16:01:38 UTC (rev 36224)
@@ -415,6 +415,29 @@
     }
 	
 	/**
+	 * Returns the actual resolution used to read the data given the specified target resolution
+	 * and the specified overview policy
+	 * @param policy
+	 * @param resolutions
+	 * @return
+	 */
+	public double[] getReadingResolutions(OverviewPolicy policy, double[] requestedResolution) {
+	    // find the target resolution level
+	    double[] result;
+	    if(numOverviews > 0) {
+	        int imageIdx = getOverviewImage(policy, requestedResolution);
+	        result = overViewResolutions[imageIdx];
+	    } else {
+	        result = highestRes;
+	    }
+	    
+	    // return via cloning to protect internal state
+	    double[] clone = new double[result.length];
+	    System.arraycopy(result, 0, clone, 0, result.length);
+	    return clone;
+	}
+	
+	/**
 	 * Simple support class for sorting overview resolutions
 	 * @author Andrea Aime
 	 * @author Simone Giannecchini, GeoSolutions.