public BufferedImage filter(BufferedImage src, BufferedImage dst) {
    int width = src.getWidth();
    int height = src.getHeight();

    if (dst == null) dst = createCompatibleDestImage(src, null);

    int[] inPixels = new int[width * height];
    int[] outPixels = new int[width * height];
    getRGB(src, 0, 0, width, height, inPixels);

    if (premultiplyAlpha) ImageMath.premultiply(inPixels, 0, inPixels.length);
    convolve(kernel, inPixels, outPixels, width, height, alpha, edgeAction);
    if (premultiplyAlpha) ImageMath.unpremultiply(outPixels, 0, outPixels.length);

    setRGB(dst, 0, 0, width, height, outPixels);
    return dst;
  }
Exemple #2
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  public static void blur(int[] in, int[] out, int width, int height, int radius) {
    int widthMinus1 = width - 1;
    int tableSize = 2 * radius + 1;
    int divide[] = new int[256 * tableSize];

    for (int i = 0; i < 256 * tableSize; i++) divide[i] = i / tableSize;

    int inIndex = 0;

    for (int y = 0; y < height; y++) {
      int outIndex = y;
      int ta = 0, tr = 0, tg = 0, tb = 0;

      for (int i = -radius; i <= radius; i++) {
        int rgb = in[inIndex + ImageMath.clamp(i, 0, width - 1)];
        ta += (rgb >> 24) & 0xff;
        tr += (rgb >> 16) & 0xff;
        tg += (rgb >> 8) & 0xff;
        tb += rgb & 0xff;
      }

      for (int x = 0; x < width; x++) {
        out[outIndex] = (divide[ta] << 24) | (divide[tr] << 16) | (divide[tg] << 8) | divide[tb];

        int i1 = x + radius + 1;
        if (i1 > widthMinus1) i1 = widthMinus1;
        int i2 = x - radius;
        if (i2 < 0) i2 = 0;
        int rgb1 = in[inIndex + i1];
        int rgb2 = in[inIndex + i2];

        ta += ((rgb1 >> 24) & 0xff) - ((rgb2 >> 24) & 0xff);
        tr += ((rgb1 & 0xff0000) - (rgb2 & 0xff0000)) >> 16;
        tg += ((rgb1 & 0xff00) - (rgb2 & 0xff00)) >> 8;
        tb += (rgb1 & 0xff) - (rgb2 & 0xff);
        outIndex += height;
      }
      inIndex += width;
    }
  }