/** Convolve with a 2D kernel */
  public static void convolveHV(
      Kernel kernel,
      int[] inPixels,
      int[] outPixels,
      int width,
      int height,
      boolean alpha,
      int edgeAction) {
    int index = 0;
    float[] matrix = kernel.getKernelData(null);
    int rows = kernel.getHeight();
    int cols = kernel.getWidth();
    int rows2 = rows / 2;
    int cols2 = cols / 2;

    for (int y = 0; y < height; y++) {
      for (int x = 0; x < width; x++) {
        float r = 0, g = 0, b = 0, a = 0;

        for (int row = -rows2; row <= rows2; row++) {
          int iy = y + row;
          int ioffset;
          if (0 <= iy && iy < height) ioffset = iy * width;
          else if (edgeAction == CLAMP_EDGES) ioffset = y * width;
          else if (edgeAction == WRAP_EDGES) ioffset = ((iy + height) % height) * width;
          else continue;
          int moffset = cols * (row + rows2) + cols2;
          for (int col = -cols2; col <= cols2; col++) {
            float f = matrix[moffset + col];

            if (f != 0) {
              int ix = x + col;
              if (!(0 <= ix && ix < width)) {
                if (edgeAction == CLAMP_EDGES) ix = x;
                else if (edgeAction == WRAP_EDGES) ix = (x + width) % width;
                else continue;
              }
              int rgb = inPixels[ioffset + ix];
              a += f * ((rgb >> 24) & 0xff);
              r += f * ((rgb >> 16) & 0xff);
              g += f * ((rgb >> 8) & 0xff);
              b += f * (rgb & 0xff);
            }
          }
        }
        int ia = alpha ? PixelUtils.clamp((int) (a + 0.5)) : 0xff;
        int ir = PixelUtils.clamp((int) (r + 0.5));
        int ig = PixelUtils.clamp((int) (g + 0.5));
        int ib = PixelUtils.clamp((int) (b + 0.5));
        outPixels[index++] = (ia << 24) | (ir << 16) | (ig << 8) | ib;
      }
    }
  }
  /** Convolve with a kernel consisting of one column */
  public static void convolveV(
      Kernel kernel,
      int[] inPixels,
      int[] outPixels,
      int width,
      int height,
      boolean alpha,
      int edgeAction) {
    int index = 0;
    float[] matrix = kernel.getKernelData(null);
    int rows = kernel.getHeight();
    int rows2 = rows / 2;

    for (int y = 0; y < height; y++) {
      for (int x = 0; x < width; x++) {
        float r = 0, g = 0, b = 0, a = 0;

        for (int row = -rows2; row <= rows2; row++) {
          int iy = y + row;
          int ioffset;
          if (iy < 0) {
            if (edgeAction == CLAMP_EDGES) ioffset = 0;
            else if (edgeAction == WRAP_EDGES) ioffset = ((y + height) % height) * width;
            else ioffset = iy * width;
          } else if (iy >= height) {
            if (edgeAction == CLAMP_EDGES) ioffset = (height - 1) * width;
            else if (edgeAction == WRAP_EDGES) ioffset = ((y + height) % height) * width;
            else ioffset = iy * width;
          } else ioffset = iy * width;

          float f = matrix[row + rows2];

          if (f != 0) {
            int rgb = inPixels[ioffset + x];
            a += f * ((rgb >> 24) & 0xff);
            r += f * ((rgb >> 16) & 0xff);
            g += f * ((rgb >> 8) & 0xff);
            b += f * (rgb & 0xff);
          }
        }
        int ia = alpha ? PixelUtils.clamp((int) (a + 0.5)) : 0xff;
        int ir = PixelUtils.clamp((int) (r + 0.5));
        int ig = PixelUtils.clamp((int) (g + 0.5));
        int ib = PixelUtils.clamp((int) (b + 0.5));
        outPixels[index++] = (ia << 24) | (ir << 16) | (ig << 8) | ib;
      }
    }
  }
  /** Convolve with a kernel consisting of one row */
  public static void convolveH(
      Kernel kernel,
      int[] inPixels,
      int[] outPixels,
      int width,
      int height,
      boolean alpha,
      int edgeAction) {
    int index = 0;
    float[] matrix = kernel.getKernelData(null);
    int cols = kernel.getWidth();
    int cols2 = cols / 2;

    for (int y = 0; y < height; y++) {
      int ioffset = y * width;
      for (int x = 0; x < width; x++) {
        float r = 0, g = 0, b = 0, a = 0;
        int moffset = cols2;
        for (int col = -cols2; col <= cols2; col++) {
          float f = matrix[moffset + col];

          if (f != 0) {
            int ix = x + col;
            if (ix < 0) {
              if (edgeAction == CLAMP_EDGES) ix = 0;
              else if (edgeAction == WRAP_EDGES) ix = (x + width) % width;
            } else if (ix >= width) {
              if (edgeAction == CLAMP_EDGES) ix = width - 1;
              else if (edgeAction == WRAP_EDGES) ix = (x + width) % width;
            }
            int rgb = inPixels[ioffset + ix];
            a += f * ((rgb >> 24) & 0xff);
            r += f * ((rgb >> 16) & 0xff);
            g += f * ((rgb >> 8) & 0xff);
            b += f * (rgb & 0xff);
          }
        }
        int ia = alpha ? PixelUtils.clamp((int) (a + 0.5)) : 0xff;
        int ir = PixelUtils.clamp((int) (r + 0.5));
        int ig = PixelUtils.clamp((int) (g + 0.5));
        int ib = PixelUtils.clamp((int) (b + 0.5));
        outPixels[index++] = (ia << 24) | (ir << 16) | (ig << 8) | ib;
      }
    }
  }
 private int displacementMap(int x, int y) {
   return PixelUtils.clamp((int) (127 * (1 + Noise.noise2(x / xScale, y / xScale))));
 }
Ejemplo n.º 5
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/*
Ejemplo n.º 6
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  /**
   * Blur and transpose a block of ARGB pixels.
   *
   * @param kernel the blur kernel
   * @param inPixels the input pixels
   * @param outPixels the output pixels
   * @param width the width of the pixel array
   * @param height the height of the pixel array
   * @param alpha whether to blur the alpha channel
   * @param edgeAction what to do at the edges
   */
  public static void convolveAndTranspose(
      Kernel kernel,
      int[] inPixels,
      int[] outPixels,
      int width,
      int height,
      boolean alpha,
      boolean premultiply,
      boolean unpremultiply,
      int edgeAction) {
    float[] matrix = kernel.getKernelData(null);
    int cols = kernel.getWidth();
    int cols2 = cols / 2;

    for (int y = 0; y < height; y++) {
      int index = y;
      int ioffset = y * width;
      for (int x = 0; x < width; x++) {
        float r = 0, g = 0, b = 0, a = 0;
        int moffset = cols2;
        for (int col = -cols2; col <= cols2; col++) {
          float f = matrix[moffset + col];

          if (f != 0) {
            int ix = x + col;
            if (ix < 0) {
              if (edgeAction == CLAMP_EDGES) ix = 0;
              else if (edgeAction == WRAP_EDGES) ix = (x + width) % width;
            } else if (ix >= width) {
              if (edgeAction == CLAMP_EDGES) ix = width - 1;
              else if (edgeAction == WRAP_EDGES) ix = (x + width) % width;
            }
            int rgb = inPixels[ioffset + ix];
            int pa = (rgb >> 24) & 0xff;
            int pr = (rgb >> 16) & 0xff;
            int pg = (rgb >> 8) & 0xff;
            int pb = rgb & 0xff;
            if (premultiply) {
              float a255 = pa * (1.0f / 255.0f);
              pr *= a255;
              pg *= a255;
              pb *= a255;
            }
            a += f * pa;
            r += f * pr;
            g += f * pg;
            b += f * pb;
          }
        }
        if (unpremultiply && a != 0 && a != 255) {
          float f = 255.0f / a;
          r *= f;
          g *= f;
          b *= f;
        }
        int ia = alpha ? PixelUtils.clamp((int) (a + 0.5)) : 0xff;
        int ir = PixelUtils.clamp((int) (r + 0.5));
        int ig = PixelUtils.clamp((int) (g + 0.5));
        int ib = PixelUtils.clamp((int) (b + 0.5));
        outPixels[index] = (ia << 24) | (ir << 16) | (ig << 8) | ib;
        index += height;
      }
    }
  }