get Embossed Bitmap - Android Graphics

Android examples for Graphics:Bitmap Effect

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  2. Android
  3. Graphics
  4. Bitmap Effect

Description

get Embossed Bitmap

Demo Code


import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader.TileMode;
import android.graphics.YuvImage;
import android.graphics.drawable.Drawable;

public class Main{
    /* ww  w .  j av  a 2s  .c o m*/

    private static final String TAG = ImgUtil.class.getSimpleName();
    
    public static Bitmap getEmbossedBitmap(Bitmap src, boolean recycleSrc) {
        Bitmap embossed = embossBitmap(src.copy(Config.RGB_565, true));
        if (recycleSrc && embossed != src) {
            src.recycle();
        }
        return embossed;
    }
    
    public static Bitmap embossBitmap(Bitmap src) {
        if (!src.isMutable()) {
            LogUtil.w(TAG, "embossBitmap", "source bitmap is not mutable");
            return src;
        }

        int width = src.getWidth();
        int height = src.getHeight();
        int pixR = 0;
        int pixG = 0;
        int pixB = 0;
        int pixColor = 0;
        int newR = 0;
        int newG = 0;
        int newB = 0;
        int[] pixels = new int[width * height];
        src.getPixels(pixels, 0, width, 0, 0, width, height);
        int pos = 0;
        for (int i = 1, length = height - 1; i < length; i++) {
            for (int k = 1, len = width - 1; k < len; k++) {
                pos = i * width + k;
                pixColor = pixels[pos];
                pixR = Color.red(pixColor);
                pixG = Color.green(pixColor);
                pixB = Color.blue(pixColor);
                pixColor = pixels[pos + 1];
                newR = Color.red(pixColor) - pixR + 127;
                newG = Color.green(pixColor) - pixG + 127;
                newB = Color.blue(pixColor) - pixB + 127;
                newR = Math.min(255, Math.max(0, newR));
                newG = Math.min(255, Math.max(0, newG));
                newB = Math.min(255, Math.max(0, newB));
                pixels[pos] = Color.argb(255, newR, newG, newB);
            }
        }

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

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