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package imaging.filters;
import java.awt.image.*;
public class PixelizeFilter extends SpatialFilter
{
private int pwidth_ = 4;
private int pheight_ = 4;
public PixelizeFilter()
{
}
public PixelizeFilter(int pwidth, int pheight)
{
pwidth_ = pwidth;
pheight_ = pheight;
}
public String info ()
{
return "Pixelizes the image.";
}
public void imageComplete(int status)
{
if (status == IMAGEERROR || status == IMAGEABORTED)
{
consumer.imageComplete(status);
System.out.println("Image Error: " + status);
return;
}
int pixel;
int nsum, asum, rsum, gsum, bsum, nwide, nhigh, stx, sty, x, y;
int x_offset, y_offset, x_extent, y_extent;
int[] results = new int[pwidth_*pheight_];
nwide = (columns_ + pwidth_ - 1) / pwidth_;
nhigh = (rows_ + pheight_ - 1) / pheight_;
stx = -(nwide*pwidth_ - columns_)/2;
sty = -(nhigh*pheight_ - rows_)/2;
y = sty;
for (int i = 0; i < nhigh; i++, y += pheight_)
{
x = stx;
for (int j = 0; j < nwide; j++, x += pwidth_)
{
nsum = asum = rsum = bsum = gsum = 0;
for (int y1 = y; y1 < y + pheight_; y1++)
{
for (int x1 = x; x1 < x + pwidth_; x1++)
{
if (x1 >= 0 && y1 >= 0 && x1 < columns_ && y1 < rows_)
{
nsum++;
pixel = raster_[y1*columns_ + x1];
asum += (pixel >> 24) & 0xff;
rsum += (pixel >> 16) & 0xff;
gsum += (pixel >> 8 ) & 0xff;
bsum += pixel & 0xff;
}
}
}
if (nsum > 0)
{
rsum /= nsum;
gsum /= nsum;
bsum /= nsum;
if (asum < 0) asum = 0;
if (rsum < 0) rsum = 0;
if (gsum < 0) gsum = 0;
if (bsum < 0) bsum = 0 ;
if (asum > 255) asum = 255;
if (rsum > 255) rsum = 255;
if (gsum > 255) gsum = 255;
if (bsum > 255) bsum = 255;
}
for (int k = 0; k < pwidth_*pheight_; k++)
results[k] = (asum << 24) | (rsum << 16) | (gsum << 8) | bsum;
x_offset = x;
y_offset = y;
x_extent = pwidth_;
y_extent = pheight_;
if (x < 0)
x_offset = -x;
if (y < 0)
y_offset = -y;
if (x + pwidth_ > columns_)
x_extent = x - columns_;
if (y + pheight_ > rows_)
y_extent = y - rows_;
consumer.setPixels(x_offset, y_offset, x_extent, y_extent, defaultRGB_, results, 0, x_extent);
}
}
consumer.imageComplete(status);
}
}
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