Android Bitmap Create generateBitmap(int width, int height)

Description

generate Bitmap

License

Open Source License

Declaration

public static Bitmap generateBitmap(int width, int height) 

Method Source Code

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

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

public class Main {
    public static Bitmap generateBitmap(int width, int height) {
        // Algorithms based on:
        // http://countercomplex.blogspot.com/2011/10/some-deep-analysis-of-one-line-music.html

        Bitmap bitmap = Bitmap.createBitmap(width, height,
                Bitmap.Config.ARGB_8888);
        int t = (int) (255.0 * Math.random());
        int r = (int) (255.0 * Math.random());
        int g = (int) (255.0 * Math.random());
        int b = (int) (255.0 * Math.random());
        int offset1 = (int) (255 * Math.random());
        int offset2 = (int) (255 * Math.random());
        int offset3 = (int) (255 * Math.random());
        int rm1 = 1 + (int) (12 * Math.random());
        int gm1 = 1 + (int) (12 * Math.random());
        int bm1 = 1 + (int) (12 * Math.random());
        int rm2 = 1 + (int) (12 * Math.random());
        int gm2 = 1 + (int) (12 * Math.random());
        int bm2 = 1 + (int) (12 * Math.random());
        int rm3 = 1 + (int) (12 * Math.random());
        int gm3 = 1 + (int) (12 * Math.random());
        int bm3 = 1 + (int) (12 * Math.random());

        int[] mods = { 65535, width, height, 255, 64, 32, 512, 1024, width,
                height, width, height };
        int rmod = mods[(int) (mods.length * Math.random())];
        int gmod = mods[(int) (mods.length * Math.random())];
        int bmod = mods[(int) (mods.length * Math.random())];

        int rs1 = 1 + (int) (11 * Math.random());
        int gs1 = 1 + (int) (11 * Math.random());
        int bs1 = 1 + (int) (11 * Math.random());
        int rs2 = 1 + (int) (11 * Math.random());
        int gs2 = 1 + (int) (11 * Math.random());
        int bs2 = 1 + (int) (11 * Math.random());

        int rf = (int) (2 * Math.random());
        int bf = (int) (2 * Math.random());
        int gf = (int) (2 * Math.random());

        int[] pixels = new int[width * height];
        float[] hsv = new float[3];
        boolean isHSV = (Math.random() > 0.5);
        int constantT = (Math.random() > 0.5) ? 1 : 0;
        int c;// www.  ja v  a2s  .c  o  m
        //public void setPixels (int[] pixels, int offset, int stride, int x, int y, int width, int height) 
        for (int i = 0; i < height; i++) {
            for (int j = 0; j < width; j++) {
                r = (r
                        + offset1
                        + (b * rf | t * rm1 & t >> rs1 | t * rm2 & t >> rs2 | t
                                * rm3 & t / 1024) - 1)
                        % rmod;
                g = (g
                        + offset2
                        + (r * gf | t * gm1 & t >> gs1 | t * gm2 & t >> gs2 | t
                                * gm3 & t / 1024) - 1)
                        % gmod;
                b = (b
                        + offset3
                        + (g * bf | t * bm1 & t >> bs1 | t * bm2 & t >> bs2 | t
                                * bm3 & t / 1024) - 1)
                        % bmod;
                if (isHSV) {
                    hsv[0] = (float) r / (float) 255.0;
                    hsv[1] = (float) g / (float) 255.0;
                    hsv[2] = (float) b / (float) 255.0;
                    //   int c = Color.rgb(r,g,b);
                    c = Color.HSVToColor(hsv);
                } else {
                    c = Color.rgb(r, g, b);
                }
                pixels[i * width + j] = c;
                t = t + constantT * 1;

            }
        }
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }
}

Related

1. getBitmapFromImageView(ImageView theImage)
2. getBitmapFromResource(Resources resources, int resourceId, int reqWidth, int reqHeight)
3. getBitmapFromURI(Context context, Uri uri)
4. getBackground(int bgcolor)
5. makeBitmap(int minSideLength, int maxNumOfPixels, Uri uri, ContentResolver cr, ParcelFileDescriptor pfd, BitmapFactory.Options options)