org.apache.batik.extension.svg.HistogramRed Maven / Gradle / Ivy
/*
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package org.apache.batik.extension.svg;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import org.apache.batik.ext.awt.image.rendered.AbstractRed;
import org.apache.batik.ext.awt.image.rendered.CachableRed;
/**
*
* @author Vincent Hardy
* @version $Id$
*/
public class HistogramRed extends AbstractRed {
// This is used to track which tiles we have computed
// a histogram for.
boolean [] computed;
int tallied = 0;
int [] bins = new int[256];
public HistogramRed(CachableRed src){
super(src, null);
int tiles = getNumXTiles()*getNumYTiles();
computed = new boolean[tiles];
}
public void tallyTile(Raster r) {
final int minX = r.getMinX();
final int minY = r.getMinY();
final int w = r.getWidth();
final int h = r.getHeight();
int [] samples = null;
int val;
for (int y=minY; y>4]++;
}
}
tallied++;
}
public int [] getHistogram() {
if (tallied == computed.length)
return bins;
CachableRed src = (CachableRed)getSources().get( 0 );
int yt0 = src.getMinTileY();
int xtiles = src.getNumXTiles();
int xt0 = src.getMinTileX();
for (int y=0; y