Add:port_android:Support raster maps on Android as described in #1285.|Thank you jandegr

git-svn-id: http://svn.code.sf.net/p/navit/code/trunk/navit@6126 ffa7fe5e-494d-0410-b361-a75ebd5db220

1 files changed, 43 insertions, 0 deletions

diff --git a/navit/android/src/org/navitproject/navit/NavitGraphics.java b/navit/android/src/org/navitproject/navit/NavitGraphics.java
index ef73a5449..fc4944240 100644
--- a/navit/android/src/org/navitproject/navit/NavitGraphics.java
+++ b/navit/android/src/org/navitproject/navit/NavitGraphics.java
@@ -27,6 +27,7 @@ import android.app.Activity;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
+import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.PointF;
@@ -931,6 +932,48 @@ public class NavitGraphics
 		draw_canvas.drawBitmap(bitmap, x, y, paint);
 	}
 
+	/* takes an image and draws it on the screen as a prerendered maptile
+	 * 
+	 * 
+	 * 
+	 * @param paint		Paint object used to draw the image
+	 * @param count		the number of points specified 
+	 * @param p0x and p0y 	specifying the top left point
+	 * @param p1x and p1y 	specifying the top right point
+	 * @param p2x and p2y 	specifying the bottom left point, not yet used but kept 
+	 * 						for compatibility with the linux port
+	 * @param bitmap	Bitmap object holding the image to draw
+	 * 
+	 * TODO make it work with 4 points specified to make it work for 3D mapview, so it can be used
+	 * 		for small but very detailed maps as well as for large maps with very little detail but large
+	 * 		coverage.
+	 * TODO make it work with rectangular tiles as well ?
+	 */
+	protected void draw_image_warp(Paint paint, int count, int p0x, int p0y, int p1x, int p1y, int p2x, int p2y, Bitmap bitmap)
+	{
+	
+		float width;
+		float scale;
+		float deltaY;
+		float deltaX;
+		float angle;
+		Matrix matrix;	
+	
+		if (count == 3)
+		{			
+			matrix = new Matrix();
+			deltaX = p1x - p0x;
+			deltaY = p1y - p0y;
+			width = (float) (Math.sqrt((deltaX * deltaX) + (deltaY * deltaY)));			
+			angle = (float) (Math.atan2(deltaY, deltaX) * 180d / Math.PI);
+			scale = width / bitmap.getWidth();
+			matrix.preScale(scale, scale);
+			matrix.postTranslate(p0x, p0y);			
+			matrix.postRotate(angle, p0x, p0y);
+			draw_canvas.drawBitmap(bitmap, matrix, paint);
+		}
+	}
+
 	/* These constants must be synchronized with enum draw_mode_num in graphics.h. */
 	public static final int draw_mode_begin = 0;
 	public static final int draw_mode_end = 1;