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package imaging.filters;
import java.awt.image.*;
import java.util.Random;
public class SpreadFilter extends SpatialFilter
{
private int pwidth_ = 5;
private int pheight_ = 5;
public SpreadFilter()
{
}
public SpreadFilter(int pwidth, int pheight)
{
pwidth_ = pwidth;
pheight_ = pheight;
}
public String info ()
{
return "Spreads an image (an effect of being under water).";
}
public void imageComplete(int status)
{
if (status == IMAGEERROR || status == IMAGEABORTED)
{
consumer.imageComplete(status);
System.out.println("Image Error: " + status);
return;
}
Random rand = new Random();
int[] pixels = new int[columns_];
int d, dx, dy, x1, y1, xrng, xoff, yrng, yoff;
int minx, maxx, miny, maxy, rdist, tmp;
for (int y = 0; y < rows_; y++)
{
for (int x = 0; x < columns_; x++)
{
if (pwidth_ < 0)
{
d = (pwidth_ < 0 ? -pwidth_ : pwidth_);
minx = x - d;
if (minx < 0)
minx = 0;
maxx = x + d;
if (maxx >= columns_)
maxx = columns_ - 1;
tmp = rand.nextInt();
tmp = (tmp < 0 ? -tmp : tmp);
x1 = minx + tmp % ((maxx - minx) + 1);
miny = y - d;
if (miny < 0)
miny = 0;
maxy = y + d;
if (maxy >= rows_)
maxy = rows_ - 1;
rdist = d - (x1 < x ? -(x1 - x) : x1 - x);
if (y - miny > rdist)
miny = (y - rdist);
if (maxy - y > rdist)
maxy = (y + rdist);
tmp = rand.nextInt();
tmp = (tmp < 0 ? -tmp : tmp);
y1 = miny + tmp % ((maxy - miny) + 1);
}
else
{
minx = x - pwidth_;
if (minx < 0)
minx = 0;
maxx = x + pwidth_;
if (maxx >= columns_)
maxx = columns_ - 1;
tmp = rand.nextInt();
tmp = (tmp < 0 ? -tmp : tmp);
x1 = minx + tmp % ((maxx - minx) + 1);
miny = y - pheight_;
if (miny < 0)
miny = 0;
maxy = y + pheight_;
if (maxx >= columns_)
maxx = columns_ - 1;
tmp = rand.nextInt();
tmp = (tmp < 0 ? -tmp : tmp);
y1 = miny + tmp % ((maxy - miny) + 1);
}
if (x1 >= 0 && y1 >= 0 && x1 < columns_ && y1 < rows_)
{
int pixel = raster_[y1*columns_ + x1];
int alpha = (pixel >> 24) & 0xff;
int red = (pixel >> 16) & 0xff;
int green = (pixel >> 8) & 0xff;
int blue = pixel & 0xff;
pixels[x] = (alpha << 24) | (red << 16) | (green << 8) | blue;
}
}
consumer.setPixels(0, y, columns_, 1, defaultRGB_, pixels, 0, columns_);
}
consumer.imageComplete(status);
}
}
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