Example usage for android.renderscript ScriptIntrinsicHistogram setOutput

Introduction

In this page you can find the example usage for android.renderscript ScriptIntrinsicHistogram setOutput.

Prototype

public void setOutput(Allocation aout) 

Source Link

Document

Set the output of the histogram.

Usage

From source file:Main.java

/**
 * Return the histograms for each color channel (interleaved).
 *
 * @param rs a {@link RenderScript} context to use.
 * @param bmap a {@link Bitmap} to generate the histograms for.
 * @return an array containing NUM_CHANNELS * COLOR_BIT_DEPTH histogram bucket values, with
 * the color channels interleaved./*from   ww w.j av a  2 s. co  m*/
 */
public static int[] calcHistograms(RenderScript rs, Bitmap bmap) {
    ScriptIntrinsicHistogram hist = ScriptIntrinsicHistogram.create(rs, Element.U8_4(rs));
    Allocation sums = Allocation.createSized(rs, Element.I32_4(rs), COLOR_BIT_DEPTH);

    // Setup input allocation (ARGB 8888 bitmap).
    Allocation input = Allocation.createFromBitmap(rs, bmap);

    hist.setOutput(sums);
    hist.forEach(input);
    int[] output = new int[COLOR_BIT_DEPTH * NUM_CHANNELS];
    sums.copyTo(output);
    return output;
}

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