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<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" lang="en"><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/><link rel="stylesheet" href="../../jacoco-resources/report.css" type="text/css"/><link rel="shortcut icon" href="../../jacoco-resources/report.gif" type="image/gif"/><title>HistogramJava2D.java</title><link rel="stylesheet" href="../../jacoco-resources/prettify.css" type="text/css"/><script type="text/javascript" src="../../jacoco-resources/prettify.js"></script></head><body onload="window['PR_TAB_WIDTH']=4;prettyPrint()"><div class="breadcrumb" id="breadcrumb"><span class="info"><a href="../../jacoco-sessions.html" class="el_session">Sessions</a></span><a href="../../index.html" class="el_report">Mistral Examples Miscellaneous</a> &gt; <a href="../index.html" class="el_bundle">image-operations</a> &gt; <a href="index.source.html" class="el_package">it.tidalwave.image.java2d</a> &gt; <span class="el_source">HistogramJava2D.java</span></div><h1>HistogramJava2D.java</h1><pre class="source lang-java linenums">/*
 * *********************************************************************************************************************
 *
 * Mistral: open source imaging engine
 * http://tidalwave.it/projects/mistral
 *
 * Copyright (C) 2003 - 2023 by Tidalwave s.a.s. (http://tidalwave.it)
 *
 * *********************************************************************************************************************
 *
 * Licensed under the Apache License, Version 2.0 (the &quot;License&quot;); 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 &quot;AS IS&quot; 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.
 *
 * *********************************************************************************************************************
 *
 * git clone https://bitbucket.org/tidalwave/mistral-src
 * git clone https://github.com/tidalwave-it/mistral-src
 *
 * *********************************************************************************************************************
 */
package it.tidalwave.image.java2d;

import java.awt.image.BufferedImage;
import java.awt.image.Raster;
import java.awt.image.RenderedImage;
import it.tidalwave.image.Histogram;
import it.tidalwave.image.render.PreviewSettings;
import lombok.extern.slf4j.Slf4j;

/***********************************************************************************************************************
 *
 * @author Fabrizio Giudici
 *
 **********************************************************************************************************************/
<span class="nc" id="L41">@Slf4j</span>
public class HistogramJava2D extends Histogram
  {
    private RenderedImage renderedImage;
    private int[][] bandData;
    private int[] max;
    private int[] min;
    private int shift;

    /*******************************************************************************************************************
     *
     * @param image
     *
     ******************************************************************************************************************/

    /* package */ HistogramJava2D (final RenderedImage renderedImage)
      {
<span class="nc" id="L58">        super(renderedImage);</span>
<span class="nc" id="L59">        this.renderedImage = renderedImage;</span>
<span class="nc" id="L60">        compute();</span>
<span class="nc" id="L61">      }</span>

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    public int[] getFrequencies (final int band)
      {
<span class="nc" id="L71">        validateBand(band);</span>

<span class="nc" id="L73">        synchronized (this)</span>
          {
<span class="nc bnc" id="L75" title="All 2 branches missed.">            if (bandData == null)</span>
              {
<span class="nc" id="L77">                compute();</span>
              }
<span class="nc" id="L79">          }</span>

<span class="nc" id="L81">        return bandData[band];</span>
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    public int getMin (final int band)
      {
<span class="nc" id="L92">        validateBand(band);</span>

<span class="nc" id="L94">        return min[band];</span>
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    public int getMax (final int band)
      {
<span class="nc" id="L105">        validateBand(band);</span>

<span class="nc" id="L107">        return max[band];</span>
      }

    /*******************************************************************************************************************
     *
     ******************************************************************************************************************/
    private void compute()
      {
<span class="nc" id="L115">        log.info(&quot;compute()&quot;);</span>
<span class="nc" id="L116">        bandCount = renderedImage.getSampleModel().getNumBands();</span>
<span class="nc" id="L117">        bitsPerBand = renderedImage.getSampleModel().getSampleSize(0);</span>
<span class="nc" id="L118">        shift = 0;</span>

<span class="nc bnc" id="L120" title="All 2 branches missed.">        if (bitsPerBand == 16)</span>
          {
<span class="nc" id="L122">            shift = 16 - 8; // FIXME: should be only for 12bbp files such as NEF </span>

should be only for 12bbp files such as NEF 
          }

<span class="nc" id="L125">        bandData = new int[bandCount][1 &lt;&lt; (bitsPerBand - shift)];</span>
<span class="nc" id="L126">        min = new int[bandCount];</span>
<span class="nc" id="L127">        max = new int[bandCount];</span>
<span class="nc" id="L128">        log.info(&quot;&gt;&gt;&gt;&gt; Allocated bandData[&quot; + bandData.length + &quot;][&quot; + bandData[0].length + &quot;]&quot;);</span>
<span class="nc" id="L129">        genericCompute();</span>

        //DataBuffer dataBuffer = raster.getDataBuffer();
        //int dataBufferSize = DataBuffer.getDataTypeSize(dataBuffer.getDataType());
        //        if (dataBuffer instanceof DataBufferInt)
        //            DataBufferInt dbs = (DataBufferInt)dataBuffer;
        //            int[][] bankData = dbs.getBankData();
        //            log.info(&quot;&gt;&gt;&gt;&gt; bankData[&quot; + bankData.length + &quot;][&quot; + bankData[0].length + &quot;]&quot;);
        //            int[] offsets = dbs.getOffsets();
        //            int scanStride = w;
<span class="nc" id="L139">      }</span>

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    public it.tidalwave.image.Histogram getPreview (final PreviewSettings previewSetting)
      {
<span class="nc" id="L149">        final var previewHistogram = new HistogramJava2D(null);</span>
<span class="nc" id="L150">        previewHistogram.bandCount = bandCount;</span>
<span class="nc" id="L151">        previewHistogram.bandData = new int[bandCount][];</span>

<span class="nc" id="L153">        final var lut8bit = previewSetting.getLookupTable8bit().getTable();</span>
<span class="nc" id="L154">        final var lut16bit = previewSetting.getLookupTable16bit().getTable();</span>

<span class="nc bnc" id="L156" title="All 2 branches missed.">        for (var band = 0; band &lt; bandCount; band++)</span>
          {
<span class="nc" id="L158">            final var len = bandData[band].length;</span>
<span class="nc" id="L159">            previewHistogram.bandData[band] = new int[len];</span>

<span class="nc bnc" id="L161" title="All 2 branches missed.">            for (var i = 0; i &lt; len; i++)</span>
              {
<span class="nc bnc" id="L163" title="All 2 branches missed.">                final var dst = (len &lt;= 256) ? (lut8bit[band][i] &amp; 0xff) : (lut16bit[band][i] &amp; 0xffff);</span>
<span class="nc" id="L164">                previewHistogram.bandData[band][dst] += bandData[band][i];</span>
              }
          }

<span class="nc" id="L168">        return previewHistogram;</span>
      }

    /*******************************************************************************************************************
     *
     * Works with every kind of data buffer, but it's not fast.
     *
     * @param raster
     * @param shift
     * @param w
     * @param h
     * @param first
     *
     ******************************************************************************************************************/
    private void genericCompute()
      {
<span class="nc" id="L184">        final Raster raster = ((BufferedImage)image).getRaster();</span>
<span class="nc" id="L185">        final var w = renderedImage.getWidth();</span>
<span class="nc" id="L186">        final var h = renderedImage.getHeight();</span>
<span class="nc" id="L187">        var first = true;</span>

<span class="nc bnc" id="L189" title="All 2 branches missed.">        for (var y = 0; y &lt; h; y++)</span>
          {
<span class="nc bnc" id="L191" title="All 2 branches missed.">            for (var x = 0; x &lt; w; x++)</span>
              {
<span class="nc bnc" id="L193" title="All 2 branches missed.">                for (var b = 0; b &lt; bandCount; b++)</span>
                  {
<span class="nc" id="L195">                    final var v = raster.getSample(x, y, b) &gt;&gt; shift;</span>

<span class="nc" id="L197">                    bandData[b][v]++;</span>

<span class="nc bnc" id="L199" title="All 2 branches missed.">                    if (first)</span>
                      {
<span class="nc" id="L201">                        min[b] = max[b] = v;</span>
                      }

                    else
                      {
<span class="nc bnc" id="L206" title="All 2 branches missed.">                        if (v &lt; min[b])</span>
                          {
<span class="nc" id="L208">                            min[b] = v;</span>
                          }

<span class="nc bnc" id="L211" title="All 2 branches missed.">                        else if (v &gt; max[b])</span>
                          {
<span class="nc" id="L213">                            max[b] = v;</span>
                          }
                      }
                  }

<span class="nc" id="L218">                first = false;</span>
              }
          }
<span class="nc" id="L221">      }</span>
  }
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