X-Git-Url: https://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fsave%2FMapGrouter.java;fp=src%2Ftim%2Fprune%2Fsave%2FMapGrouter.java;h=263a3067f4902b5916c2b5e43d63bfeccdb21c5c;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/save/MapGrouter.java b/src/tim/prune/save/MapGrouter.java
new file mode 100644
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+++ b/src/tim/prune/save/MapGrouter.java
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+package tim.prune.save;
+
+import tim.prune.data.DoubleRange;
+import tim.prune.data.Track;
+import tim.prune.data.TrackExtents;
+import tim.prune.gui.map.MapSource;
+import tim.prune.gui.map.MapTileManager;
+import tim.prune.gui.map.TileConsumer;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+
+
+/**
+ * Class to handle the sticking together (grouting) of map tiles
+ * to create a single map image for the current track
+ */
+public class MapGrouter implements TileConsumer
+{
+	/** The most recently produced image */
+	private GroutedImage _lastGroutedImage = null;
+
+	/**
+	 * Clear the last image, it's not needed any more
+	 */
+	public void clearMapImage() {
+		_lastGroutedImage = null;
+	}
+
+	/**
+	 * Grout the required map tiles together according to the track's extent
+	 * @param inTrack track object
+	 * @param inMapSource map source to use (may have one or two layers)
+	 * @param inZoom selected zoom level
+	 * @return grouted image, or null if no image could be created
+	 */
+	public GroutedImage createMapImage(Track inTrack, MapSource inMapSource, int inZoom)
+	{
+		return createMapImage(inTrack, inMapSource, inZoom, false);
+	}
+
+	/**
+	 * Grout the required map tiles together according to the track's extent
+	 * @param inTrack track object
+	 * @param inMapSource map source to use (may have one or two layers)
+	 * @param inZoom selected zoom level
+	 * @param inDownload true to download tiles, false (by default) to just pull from disk
+	 * @return grouted image, or null if no image could be created
+	 */
+	public GroutedImage createMapImage(Track inTrack, MapSource inMapSource, int inZoom, boolean inDownload)
+	{
+		// Get the extents of the track including a standard (10%) border around the data
+		TrackExtents extents = new TrackExtents(inTrack);
+		extents.applySquareBorder();
+		DoubleRange xRange = extents.getXRange();
+		DoubleRange yRange = extents.getYRange();
+
+		// Work out which tiles are required
+		final int zoomFactor = 1 << inZoom;
+		final int minTileX = (int) (xRange.getMinimum() * zoomFactor);
+		final int maxTileX = (int) (xRange.getMaximum() * zoomFactor);
+		final int minTileY = (int) (yRange.getMinimum() * zoomFactor);
+		final int maxTileY = (int) (yRange.getMaximum() * zoomFactor);
+
+		// Work out how big the final image will be, create a BufferedImage
+		final int pixCount = (int) (extents.getXRange().getRange() * zoomFactor * 256);
+		if (pixCount < 2 || inZoom == 0) {return null;}
+		BufferedImage resultImage = new BufferedImage(pixCount, pixCount, BufferedImage.TYPE_INT_RGB);
+		Graphics g = resultImage.getGraphics();
+		g.setColor(Color.WHITE);
+		g.fillRect(0, 0, pixCount, pixCount);
+		// Work out where to start drawing the tiles on the image
+		int xOffset = (int) ((minTileX - xRange.getMinimum() * zoomFactor) * 256);
+
+		// Make a map tile manager to load (or download) the tiles
+		MapTileManager tileManager = new MapTileManager(this);
+		tileManager.setMapSource(inMapSource);
+		tileManager.enableTileDownloading(inDownload);
+		tileManager.setReturnIncompleteImages();
+		tileManager.setZoom(inZoom);
+
+		int numTilesUsed = 0;
+		int numTilesMissing = 0;
+
+		// Loop over the tiles
+		for (int x = minTileX; x <= maxTileX; x++)
+		{
+			int yOffset = (int) ((minTileY - yRange.getMinimum() * zoomFactor) * 256);
+			for (int y = minTileY; y <= maxTileY; y++)
+			{
+				for (int layer=0; layer < inMapSource.getNumLayers(); layer++)
+				{
+					Image tile = tileManager.getTile(layer, x, y, true);
+					// If we're downloading tiles, wait until the tile isn't null
+					int waitCount = 0;
+					while (tile == null && inDownload && waitCount < 3)
+					{
+						// System.out.println("wait " + waitCount + " for tile to be not null");
+						try {Thread.sleep(250);} catch (InterruptedException e) {}
+						tile = tileManager.getTile(layer, x, y, false); // don't request another download
+						waitCount++;
+					}
+					// See if there's a tile or not
+					if (tile != null)
+					{
+						// Wait until tile is available (loaded asynchronously)
+						while (tile.getWidth(null) < 0 && !inDownload)
+						{
+							// System.out.println("Wait for tile width");
+							try {
+								Thread.sleep(inDownload ? 500 : 100);
+							}
+							catch (InterruptedException ie) {}
+						}
+						// work out where to copy it to, paint it
+						// System.out.println("Painting tile " + x + "," + y + " at " + xOffset + "," + yOffset);
+						numTilesUsed++;
+						g.drawImage(tile, xOffset, yOffset, null);
+					}
+					else
+					{
+						// null tile, that means it's either not available or really slow to start downloading
+						numTilesMissing++;
+					}
+				}
+				yOffset += 256;
+			}
+			xOffset += 256;
+		}
+		// Get rid of the image if it's empty
+		if (numTilesUsed == 0) {
+			resultImage = null;
+		}
+		// Store the xy limits in the GroutedImage to make it easier to draw on top
+		GroutedImage result = new GroutedImage(resultImage, numTilesUsed, numTilesMissing);
+		result.setXRange(xRange);
+		result.setYRange(yRange);
+		return result;
+	}
+
+	/**
+	 * Get the grouted map image, using the previously-created one if available
+	 * @param inTrack track object
+	 * @param inMapSource map source to use (may have one or two layers)
+	 * @param inZoom selected zoom level
+	 * @return grouted image, or null if no image could be created
+	 */
+	public synchronized GroutedImage getMapImage(Track inTrack, MapSource inMapSource, int inZoom)
+	{
+		if (_lastGroutedImage == null) {
+			_lastGroutedImage = createMapImage(inTrack, inMapSource, inZoom);
+		}
+		return _lastGroutedImage;
+	}
+
+	/**
+	 * @param inTrack track object
+	 * @param inZoom selected zoom level
+	 * @return true if the image size is acceptable
+	 */
+	public static boolean isZoomLevelOk(Track inTrack, int inZoom)
+	{
+		// Get the extents of the track including a standard (10%) border around the data
+		TrackExtents extents = new TrackExtents(inTrack);
+		extents.applySquareBorder();
+
+		// Work out how big the final image will be
+		final int zoomFactor = 1 << inZoom;
+		final int pixCount = (int) (extents.getXRange().getRange() * zoomFactor * 256);
+		return pixCount > 2 && pixCount < 4000;
+	}
+
+	/** React to tiles being updated by the tile manager */
+	public void tilesUpdated(boolean inIsOk)
+	{
+		// Doesn't need any action
+	}
+}