/** 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;
}
/** Main method used to build the image based on a large number of tiles. */
public void buildImage(
BufferedImage toReturn,
int x,
int y,
int w,
int h,
int zoom,
int cachedZoom,
GMapListener listener) {
// validate
// if(x < 0 || y < 0 || w <= 0 || h <= 0) return getDefaultImage(w,h);
// if(toReturn != null) Graphics2D g = toReturn.createGraphics();
// find index of point
int xIndex = x / GDataSource.sourceSize.width;
int yIndex = y / GDataSource.sourceSize.height;
// find coord of our starting point
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;
}
// load this index
BufferedImage image = getIndexedImage(xIndex, yIndex, zoom, cachedZoom, listener);
// get info about the image
// Dimension imageSize = new Dimension(image.getWidth(),image.getHeight());
// Holds number of row and column images needed
int rowImages;
int colImages;
// find the width of what we CAN paint
int paintWidth = GDataSource.sourceSize.width - xCoord;
int paintHeight = GDataSource.sourceSize.height - yCoord;
// Calculate number of row images
if ((h - paintHeight) % 256 == 0) {
rowImages = 1 + (h - paintHeight) / 256;
} else {
rowImages = 2 + (h - paintHeight) / 256;
}
// Calculate number of column images
if ((w - paintWidth) % 256 == 0) {
colImages = 1 + (w - paintWidth) / 256;
} else {
colImages = 2 + (w - paintWidth) / 256;
}
// Overal Image coordinates
int xImage = 0;
int yImage = 0;
// DEBUG
// System.out.println(x + " " + y + " " + w + " " + h + " " + rowImages + " " + colImages);
// System.out.println();
// set listener
if (listener != null) listener.updateGMapTaskSize(rowImages * colImages);
// a counter for the listener
int completed = 0;
// Iteratively loops through all CACHED images and paints them
for (int row = 0; row < rowImages; row++) {
for (int col = 0; col < colImages; col++) {
int thisXIndex = x / GDataSource.sourceSize.width + col;
int thisYIndex = y / GDataSource.sourceSize.height + row;
getSpecificImage(x, y, w, h, col, row, toReturn, zoom, cachedZoom, listener, true);
if (getGDataSource().isCached(thisXIndex, thisYIndex, zoom)) {
if (listener != null) {
listener.updateGMapCompleted(completed);
completed++;
}
}
if (listener.asynchronousGMapStopFlag()) return;
}
}
// do the UNCACHED IMAGES NEXT
for (int row = 0; row < rowImages; row++) {
for (int col = 0; col < colImages; col++) {
int thisXIndex = x / GDataSource.sourceSize.width + col;
int thisYIndex = y / GDataSource.sourceSize.height + row;
if (!getGDataSource().isCached(thisXIndex, thisYIndex, zoom)) {
getSpecificImage(x, y, w, h, col, row, toReturn, zoom, cachedZoom, listener, false);
if (listener != null) {
listener.updateGMapCompleted(completed);
completed++;
if (listener.asynchronousGMapStopFlag()) return;
}
}
}
}
// the dispatch to GDraw object
gDraw.draw(toReturn, new GPhysicalPoint(x, y, zoom), zoom);
}