// buffered images are just better.
protected static BufferedImage imageToBufferedImage(Image img) {
BufferedImage bi =
new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
return bi;
}
public static void saveJPG(Image img, String s) {
BufferedImage bi =
new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
FileOutputStream out = null;
try {
out = new FileOutputStream(s);
} catch (java.io.FileNotFoundException io) {
System.out.println("File Not Found");
}
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(0.5f, false);
encoder.setJPEGEncodeParam(param);
try {
encoder.encode(bi);
out.close();
} catch (java.io.IOException io) {
System.out.println("IOException");
}
}
// initialize default image
private BufferedImage getDefaultImage(int w, int h) {
BufferedImage defaultImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics2D = defaultImage.createGraphics();
graphics2D.setColor(new Color(200, 200, 200));
graphics2D.fillRect(0, 0, w, h);
graphics2D.setColor(new Color(130, 130, 130));
graphics2D.drawRect(0, 0, w - 1, h - 1);
return defaultImage;
}
// returns a value specifying some kind of average brightness in the image.
protected int getAverageBrightness(BufferedImage img) {
Raster r = img.getData();
int total = 0;
for (int y = 0; y < r.getHeight(); y++) {
for (int x = 0; x < r.getWidth(); x++) {
total += r.getSample(r.getMinX() + x, r.getMinY() + y, 0);
}
}
return (int) (total / ((r.getWidth() / factorD) * (r.getHeight() / factorD)));
}
// compare the two images in this object.
public void compare() {
// setup change display image
imgc = imageToBufferedImage(img1);
Graphics2D gc = imgc.createGraphics();
gc.setColor(Color.RED);
// convert to gray images.
img1 = imageToBufferedImage(GrayFilter.createDisabledImage(img1));
img2 = imageToBufferedImage(GrayFilter.createDisabledImage(img2));
// how big are each section
int blocksx = (int) (img1.getWidth() / comparex);
int blocksy = (int) (img1.getHeight() / comparey);
// set to a match by default, if a change is found then flag non-match
this.match = true;
// loop through whole image and compare individual blocks of images
for (int y = 0; y < comparey; y++) {
if (debugMode > 0) System.out.print("|");
for (int x = 0; x < comparex; x++) {
int b1 =
getAverageBrightness(
img1.getSubimage(x * blocksx, y * blocksy, blocksx - 1, blocksy - 1));
int b2 =
getAverageBrightness(
img2.getSubimage(x * blocksx, y * blocksy, blocksx - 1, blocksy - 1));
int diff = Math.abs(b1 - b2);
if (diff
> factorA) { // the difference in a certain region has passed the threshold value of
// factorA
// draw an indicator on the change image to show where change was detected.
gc.drawRect(x * blocksx, y * blocksy, blocksx - 1, blocksy - 1);
this.match = false;
}
if (debugMode == 1) System.out.print((diff > factorA ? "X" : " "));
if (debugMode == 2) System.out.print(diff + (x < comparex - 1 ? "," : ""));
}
if (debugMode > 0) System.out.println("|");
}
}
/** Get an image based on index numbers */
public BufferedImage getIndexedImage(
int x, int y, int zoom, int cacheZoom, GMapListener listener) {
if (listener != null) {
if (!getGDataSource().isCached(x, y, zoom)) {
listener.updateGMapPainting();
listener.updateGMapMessage(GMap.MESSAGE_DOWNLOADING);
} else {
listener.updateGMapMessage(GMap.MESSAGE_PAINTING);
}
}
BufferedImage thumbImage = getGDataSource().getImage(x, y, zoom, true);
if (thumbImage == null) return defaultImage;
// if we dont have to paint cache, return here
if (cacheZoom == (GPhysicalPoint.MIN_ZOOM - 1) || cacheZoom >= zoom) return thumbImage;
BufferedImage paintedImage =
new BufferedImage(
GDataSource.sourceSize.width,
GDataSource.sourceSize.height,
BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics2D = paintedImage.createGraphics();
graphics2D.drawImage(
thumbImage, 0, 0, GDataSource.sourceSize.width, GDataSource.sourceSize.height, null);
// now lets move to painting the cache
double imageNum = Math.pow(2, zoom - cacheZoom);
// draw cache lines
int startX = (int) (imageNum * x);
int startY = (int) (imageNum * y);
// get composite to restore later, set new transparent composite
Composite originalComposite = graphics2D.getComposite();
graphics2D.setComposite(opacity40);
// draw grid
for (int i = 0; i < imageNum; i++) {
for (int j = 0; j < imageNum; j++) {
// points
Point upperLeft =
new Point(
(int) (GDataSource.sourceSize.width / imageNum) * i,
(int) (GDataSource.sourceSize.height / imageNum) * j);
Dimension size =
new Dimension(
(int) (GDataSource.sourceSize.width / imageNum),
(int) (GDataSource.sourceSize.height / imageNum));
// draw lines
graphics2D.setColor(new Color(100, 100, 100));
graphics2D.drawLine(upperLeft.x, upperLeft.y, upperLeft.x + size.width, upperLeft.y);
graphics2D.drawLine(upperLeft.x, upperLeft.y, upperLeft.x, upperLeft.y + size.height);
// check if file exists
if (getGDataSource().isCached(startX + i, startY + j, cacheZoom))
graphics2D.setColor(Color.RED);
else graphics2D.setColor(new Color(155, 155, 155));
// shade rectangle
graphics2D.fillRect(upperLeft.x, upperLeft.y, size.width, size.height);
}
}
// restore composite
graphics2D.setComposite(originalComposite);
return paintedImage;
}
private BufferedImage getSpecificImage(
int x,
int y,
int w,
int h,
int imgIndexX,
int imgIndexY,
BufferedImage buffImg,
int zoom,
int cachedZoom,
GMapListener listener,
boolean localFilesOnly) {
int xIndex = x / GDataSource.sourceSize.width;
int yIndex = y / GDataSource.sourceSize.height;
xIndex += imgIndexX;
yIndex += imgIndexY;
BufferedImage image = null;
if (!localFilesOnly || getGDataSource().isCached(xIndex, yIndex, zoom))
image = getIndexedImage(xIndex, yIndex, zoom, cachedZoom, listener);
int xCoord = x % GDataSource.sourceSize.width;
int yCoord = y % GDataSource.sourceSize.height;
// Checks for invalid xCoord and yCoord
if (xCoord < 0) {
xCoord = 0;
}
if (yCoord < 0) {
yCoord = 0;
}
// get info about the image
Dimension imageSize =
new Dimension(getGDataSource().sourceSize.width, getGDataSource().sourceSize.height);
// find the width of what we CAN paint
int initPaintWidth = imageSize.width - xCoord;
int initPaintHeight = imageSize.height - yCoord;
int paintWidth = initPaintWidth;
int paintHeight = initPaintHeight;
int rowImages = numOfRows(x, y, h, zoom, cachedZoom);
int colImages = numOfCols(x, y, w, zoom, cachedZoom);
if (imgIndexX >= colImages || imgIndexY >= rowImages) {
return null;
}
int xImage = 0;
int yImage = 0;
int xInitCoord = xCoord;
int yInitCoord = yCoord;
if (imgIndexX > 0) {
xImage = initPaintWidth + (imgIndexX - 1) * imageSize.width;
xCoord = 0;
if (imgIndexX < (colImages - 1)) {
paintWidth = imageSize.width;
} else {
paintWidth = w - ((colImages - 2) * imageSize.width) - (imageSize.width - xInitCoord);
}
}
if (imgIndexY > 0) {
yImage = initPaintHeight + (imgIndexY - 1) * imageSize.height;
yCoord = 0;
if (imgIndexY < (rowImages - 1)) {
paintHeight = imageSize.height;
} else {
paintHeight = h - ((rowImages - 2) * imageSize.height) - (imageSize.height - yInitCoord);
}
}
if (buffImg != null) {
Graphics2D g = (Graphics2D) buffImg.getGraphics();
if (image != null) {
// System.out.println(xCoord + ":" + yCoord + ":" + paintWidth + ":" + paintHeight);
g.drawImage(
image.getSubimage(xCoord, yCoord, paintWidth, paintHeight),
xImage,
yImage,
paintWidth,
paintHeight,
null);
} else {
Composite originalComposite = g.getComposite();
g.setComposite(opacity40);
g.setColor(Color.BLACK);
g.fillRect(xImage, yImage, paintWidth, paintHeight);
g.setComposite(originalComposite);
}
}
return buffImg;
}
