Package railo.runtime.img.math

Examples of railo.runtime.img.math.FFT


        int h = rows;

    tileWidth = w;
    tileHeight = h;//FIXME-tileWidth, w, and cols are always all the same

        FFT fft = new FFT( Math.max(log2rows, log2cols) );

        int[] rgb = new int[w*h];
        float[][] mask = new float[2][w*h];
        float[][] gb = new float[2][w*h];
        float[][] ar = new float[2][w*h];

        // Create the kernel
    double polyAngle = Math.PI/sides;
    double polyScale = 1.0f / Math.cos(polyAngle);
    double r2 = radius*radius;
    double rangle = Math.toRadians(angle);
    float total = 0;
        int i = 0;
        for ( int y = 0; y < h; y++ ) {
            for ( int x = 0; x < w; x++ ) {
                double dx = x-w/2f;
                double dy = y-h/2f;
        double r = dx*dx+dy*dy;
        double f = r < r2 ? 1 : 0;
        if (f != 0) {
          r = Math.sqrt(r);
          if ( sides != 0 ) {
            double a = Math.atan2(dy, dx)+rangle;
            a = ImageMath.mod(a, polyAngle*2)-polyAngle;
            f = Math.cos(a) * polyScale;
          } else
            f = 1;
          f = f*r < radius ? 1 : 0;
        }
        total += (float)f;

        mask[0][i] = (float)f;
                mask[1][i] = 0;
                i++;
            }
        }
   
        // Normalize the kernel
        i = 0;
        for ( int y = 0; y < h; y++ ) {
            for ( int x = 0; x < w; x++ ) {
                mask[0][i] /= total;
                i++;
            }
        }

        fft.transform2D( mask[0], mask[1], w, h, true );

        for ( int tileY = -iradius; tileY < height; tileY += tileHeight-2*iradius ) {
            for ( int tileX = -iradius; tileX < width; tileX += tileWidth-2*iradius ) {
//                System.out.println("Tile: "+tileX+" "+tileY+" "+tileWidth+" "+tileHeight);

                // Clip the tile to the image bounds
                int tx = tileX, ty = tileY, tw = tileWidth, th = tileHeight;
                int fx = 0, fy = 0;
                if ( tx < 0 ) {
                    tw += tx;
                    fx -= tx;
                    tx = 0;
                }
                if ( ty < 0 ) {
                    th += ty;
                    fy -= ty;
                    ty = 0;
                }
                if ( tx+tw > width )
                    tw = width-tx;
                if ( ty+th > height )
                    th = height-ty;
                src.getRGB( tx, ty, tw, th, rgb, fy*w+fx, w );

                // Create a float array from the pixels. Any pixels off the edge of the source image get duplicated from the edge.
                i = 0;
                for ( int y = 0; y < h; y++ ) {
                    int imageY = y+tileY;
                    int j;
                    if ( imageY < 0 )
                        j = fy;
                    else if ( imageY > height )
                        j = fy+th-1;
                    else
                        j = y;
                    j *= w;
                    for ( int x = 0; x < w; x++ ) {
                        int imageX = x+tileX;
                        int k;
                        if ( imageX < 0 )
                            k = fx;
                        else if ( imageX > width )
                            k = fx+tw-1;
                        else
                            k = x;
                        k += j;

                        ar[0][i] = ((rgb[k] >> 24) & 0xff);
                        float r = ((rgb[k] >> 16) & 0xff);
                        float g = ((rgb[k] >> 8) & 0xff);
                        float b = (rgb[k] & 0xff);

            // Bloom...
                        if ( r > bloomThreshold )
              r *= bloom;
//              r = bloomThreshold + (r-bloomThreshold) * bloom;
                        if ( g > bloomThreshold )
              g *= bloom;
//              g = bloomThreshold + (g-bloomThreshold) * bloom;
                        if ( b > bloomThreshold )
              b *= bloom;
//              b = bloomThreshold + (b-bloomThreshold) * bloom;

            ar[1][i] = r;
            gb[0][i] = g;
            gb[1][i] = b;

                        i++;
                        k++;
                    }
                }

                // Transform into frequency space
                fft.transform2D( ar[0], ar[1], cols, rows, true );
                fft.transform2D( gb[0], gb[1], cols, rows, true );

                // Multiply the transformed pixels by the transformed kernel
                i = 0;
                for ( int y = 0; y < h; y++ ) {
                    for ( int x = 0; x < w; x++ ) {
                        float re = ar[0][i];
                        float im = ar[1][i];
                        float rem = mask[0][i];
                        float imm = mask[1][i];
                        ar[0][i] = re*rem-im*imm;
                        ar[1][i] = re*imm+im*rem;
                       
                        re = gb[0][i];
                        im = gb[1][i];
                        gb[0][i] = re*rem-im*imm;
                        gb[1][i] = re*imm+im*rem;
                        i++;
                    }
                }

                // Transform back
                fft.transform2D( ar[0], ar[1], cols, rows, false );
                fft.transform2D( gb[0], gb[1], cols, rows, false );

                // Convert back to RGB pixels, with quadrant remapping
                int row_flip = w >> 1;
                int col_flip = h >> 1;
                int index = 0;
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