Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import android.graphics.Bitmap;
import android.graphics.Color;

public class Main {
    /**
     * Replaces colors in a bitmap that are not farther away from a specific color than a given
     * threshold.
     *
     * @param srcBitmap    The source bitmap to scan.
     * @param mutateSrc    Indicates whether to mutate srcBitmap or to produce a new one.
     * @param keepCr       The red color to keep
     * @param keepCg       The green color to keep
     * @param keepCb       The blue color to keep
     * @param replaceColor The color to replace mismatched colors with
     * @param distance     The distance threshold.
     * @param simpleBG     Whether the bitmap has a simple background
     * @return Bitmap with replaced colors
     */
    private static Bitmap replaceColors(Bitmap srcBitmap, boolean mutateSrc, int keepCr, int keepCg, int keepCb,
            int replaceColor, int distance, boolean simpleBG) {
        int[] allpixels = new int[srcBitmap.getHeight() * srcBitmap.getWidth()];
        srcBitmap.getPixels(allpixels, 0, srcBitmap.getWidth(), 0, 0, srcBitmap.getWidth(), srcBitmap.getHeight());
        int bgColor = replaceColor;
        int distanceSq = distance * distance;

        if (simpleBG) {
            bgColor = allpixels[0];
        }

        for (int i = 0; i < allpixels.length; i++) {
            /* Avoid unnecessary math for obviously background color. This removes most of the math
             * for candy, HP and name bitmaps. */
            if (allpixels[i] == bgColor) {
                allpixels[i] = replaceColor;
                continue;
            }
            int rDiff = keepCr - Color.red(allpixels[i]);
            int gDiff = keepCg - Color.green(allpixels[i]);
            int bDiff = keepCb - Color.blue(allpixels[i]);
            int dSq = rDiff * rDiff + gDiff * gDiff + bDiff * bDiff;
            if (dSq > distanceSq) {
                allpixels[i] = replaceColor;
            }
        }

        Bitmap dstBitmap;
        if (mutateSrc) {
            dstBitmap = srcBitmap;
        } else {
            dstBitmap = Bitmap.createBitmap(srcBitmap.getWidth(), srcBitmap.getHeight(), srcBitmap.getConfig());
        }
        dstBitmap.setPixels(allpixels, 0, srcBitmap.getWidth(), 0, 0, srcBitmap.getWidth(), srcBitmap.getHeight());
        return dstBitmap;
    }
}