/// <summary>
/// Called when the mapview has changed.
/// </summary>
/// <param name="map"></param>
/// <param name="zoomFactor"></param>
/// <param name="center"></param>
/// <param name="view"></param>
public void ViewChanged(Map map, float zoomFactor, GeoCoordinate center,
View2D view)
{
// calculate the current zoom level.
var zoomLevel = (int)System.Math.Round(map.Projection.ToZoomLevel(zoomFactor), 0);
// build the boundingbox.
var box = new GeoCoordinateBox(
map.Projection.ToGeoCoordinates(view.Left, view.Top),
map.Projection.ToGeoCoordinates(view.Right, view.Bottom));
// build the tile range.
TileRange range = TileRange.CreateAroundBoundingBox(box, zoomLevel);
DateTime now = DateTime.Now;
// build the new scene.
Scene2D newScene = new Scene2D();
if (_connection.State == System.Data.ConnectionState.Closed)
{
_connection.Open();
}
lock (_connection)
{ // make sure the connection is accessed synchronously.
// TODO: Investigate the SQLite multithreaded behaviour..
// TODO: this a very naive way of loading these tiles. Find a way to query SQLite more efficiently
// TODO: find a way to have some cached tiles.
foreach (var tile in range)
{
Tile invertTile = tile.InvertY();
SQLiteCommand command = new SQLiteCommand("SELECT * FROM tiles WHERE zoom_level = :zoom_level AND tile_column = :tile_column AND tile_row = :tile_row;",
_connection);
command.Parameters.AddWithValue("zoom_level", invertTile.Zoom);
command.Parameters.AddWithValue("tile_column", invertTile.X);
command.Parameters.AddWithValue("tile_row", invertTile.Y);
using (var tileReader = command.ExecuteReader())
{
while (tileReader.Read())
{
//Tile readTile = new Tile((int)tileReader["tile_column"],
// (int)tileReader["tile_row"], (int)tileReader["zoom_level"]);
float minZoom = (float)map.Projection.ToZoomFactor(tile.Zoom - 0.5f);
float maxZoom = (float)map.Projection.ToZoomFactor(tile.Zoom + 0.5f);
float left = (float)map.Projection.LongitudeToX(tile.TopLeft.Longitude);
float right = (float)map.Projection.LongitudeToX(tile.BottomRight.Longitude);
float bottom = (float)map.Projection.LatitudeToY(tile.BottomRight.Latitude);
float top = (float)map.Projection.LatitudeToY(tile.TopLeft.Latitude);
newScene.AddImage(0, minZoom, maxZoom, left, top, right, bottom,
(byte[])tileReader["tile_data"]);
}
}
}
this.Scene = newScene;
}
}
/// <summary>
/// Render the current complete scene.
/// </summary>
void Render()
{
if (_cacheRenderer.IsRunning)
{
_cacheRenderer.CancelAndWait();
}
if (_rect == null) // only render if a proper size is known.
{
return;
}
lock (_cacheRenderer) { // make sure only on thread at the same time is using the renderer.
double extra = 1.25;
// build the layers list.
var layers = new List <ILayer> ();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++)
{
layers.Add(this.Map [layerIdx]);
}
// add the internal layer.
// TODO: create marker layer.
// create a new bitmap context.
CGColorSpace space = CGColorSpace.CreateDeviceRGB();
int bytesPerPixel = 4;
int bytesPerRow = bytesPerPixel * (int)_rect.Width;
int bitsPerComponent = 8;
if (_bytescache == null)
{
_bytescache = new byte[bytesPerRow * (int)_rect.Height];
}
CGBitmapContext gctx = new CGBitmapContext(null, (int)_rect.Width, (int)_rect.Height,
bitsPerComponent, bytesPerRow,
space, // kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipLast
CGBitmapFlags.PremultipliedFirst | CGBitmapFlags.ByteOrder32Big);
// create the view.
View2D view = _cacheRenderer.Create(_rect.Width, _rect.Height,
this.Map, (float)this.Map.Projection.ToZoomFactor(this.MapZoomLevel),
this.MapCenter, false, true);
long before = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"Rendering Start");
// notify the map that the view has changed.
this.Map.ViewChanged((float)this.Map.Projection.ToZoomFactor(this.MapZoomLevel), this.MapCenter,
view);
long afterViewChanged = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoomLevel);
// // add the current canvas to the scene.
// uint canvasId = _scene.AddImage (-1, float.MinValue, float.MaxValue,
// view.Left, view.Top, view.Right, view.Bottom, new byte[0], _canvasBitmap);
// does the rendering.
bool complete = _cacheRenderer.Render(new CGContextWrapper(gctx, new RectangleF(0, 0, _rect.Width, _rect.Height)),
layers, view);
long afterRendering = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"Rendering took: {0}ms @ zoom level {1}",
(new TimeSpan(afterRendering - afterViewChanged).TotalMilliseconds), this.MapZoomLevel);
if (complete) // there was no cancellation, the rendering completely finished.
// add the result to the scene cache.
{
lock (_cachedScene) {
// add the newly rendered image again.
//this.Layer.Contents = gctx.ToImage ();
BoxF2D rectangle = view.OuterBox;
_cachedScene.Clear();
_cachedScene.AddImage(0, float.MinValue, float.MaxValue,
rectangle.Min[0], rectangle.Min[1], rectangle.Max[0], rectangle.Max[1], new byte[0], gctx.ToImage());
// _cachedScene.AddImage (0, float.MinValue, float.MaxValue,
// view.Left, view.Top, view.Right, view.Bottom, new byte[0], _layer);
}
this.InvokeOnMainThread(Test);
}
long after = DateTime.Now.Ticks;
if (!complete)
{
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information, "Rendering in {0}ms after cancellation!",
new TimeSpan(after - before).TotalMilliseconds);
}
else
{
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information, "Rendering in {0}ms",
new TimeSpan(after - before).TotalMilliseconds);
}
}
}
/// <summary>
/// Renders the current complete scene.
/// </summary>
void Render()
{
if (_cacheRenderer.IsRunning)
{
_cacheRenderer.CancelAndWait();
}
// make sure only on thread at the same time is using the renderer.
lock (_cacheRenderer) {
double extra = 1.25;
// build the layers list.
var layers = new List <ILayer> ();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++)
{
// get the layer.
layers.Add(this.Map[layerIdx]);
}
// add the internal layers.
layers.Add(_makerLayer);
// create a new cache if size has changed.
if (_canvasBitmap == null ||
_canvasBitmap.Width != (int)(this.Width * extra) ||
_canvasBitmap.Height != (int)(this.Height * extra))
{
// create a bitmap and render there.
_canvasBitmap = global::Android.Graphics.Bitmap.CreateBitmap((int)(this.Width * extra),
(int)(this.Height * extra),
global::Android.Graphics.Bitmap.Config.Argb8888);
}
else
{
// clear the cache???
}
// create and reset the canvas.
global::Android.Graphics.Canvas canvas = new global::Android.Graphics.Canvas(_canvasBitmap);
canvas.DrawColor(new global::Android.Graphics.Color(
SimpleColor.FromKnownColor(KnownColor.Transparent).Value));
// create the view.
View2D view = _cacheRenderer.Create(canvas.Width, canvas.Height,
this.Map, (float)this.Map.Projection.ToZoomFactor(this.MapZoomLevel),
this.MapCenter, _invertX, _invertY);
long before = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"Rendering Start");
// notify the map that the view has changed.
this.Map.ViewChanged((float)this.Map.Projection.ToZoomFactor(this.MapZoomLevel), this.MapCenter,
view);
long afterViewChanged = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoomLevel);
// add the current canvas to the scene.
double left = view.LeftTop [0];
double right = view.RightTop [0];
double top = view.LeftTop [1];
double bottom = view.LeftBottom [1];
uint canvasId = _scene.AddImage(-1, float.MinValue, float.MaxValue,
left, top, right, bottom, new byte[0], _canvasBitmap);
// does the rendering.
bool complete = _cacheRenderer.Render(canvas, layers, view);
long afterRendering = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"Rendering took: {0}ms @ zoom level {1}",
(new TimeSpan(afterRendering - afterViewChanged).TotalMilliseconds), this.MapZoomLevel);
if (complete)
{ // there was no cancellation, the rendering completely finished.
// add the result to the scene cache.
lock (_scene) {
// if (_previousCache.HasValue) {
// _scene.Remove (_previousCache.Value);
// }
// _scene.Remove (canvasId);
//
// add the newly rendered image again.
_scene.Clear();
//_previousCache =
BoxF2D viewBox = view.OuterBox;
_scene.AddImage(0, float.MinValue, float.MaxValue,
viewBox.Min[0], viewBox.Min[1], viewBox.Max[0], viewBox.Max[1], new byte[0], _canvasBitmap);
// switch cache and canvas to prevent re-allocation of bitmaps.
global::Android.Graphics.Bitmap newCanvas = _cache;
_cache = _canvasBitmap;
_canvasBitmap = newCanvas;
}
}
this.PostInvalidate();
long after = DateTime.Now.Ticks;
if (!complete)
{
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information, "Rendering in {0}ms after cancellation!",
new TimeSpan(after - before).TotalMilliseconds);
}
else
{
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information, "Rendering in {0}ms",
new TimeSpan(after - before).TotalMilliseconds);
}
}
}
/// <summary>
/// Translates a node.
/// </summary>
/// <param name="scene">The scene to add primitives to.</param>
/// <param name="projection">The projection used to convert the objects.</param>
/// <param name="node"></param>
private void TranslateNode(Scene2D scene, IProjection projection, CompleteNode node)
{
// build the rules.
IEnumerable <MapCSSRuleProperties> rules =
this.BuildRules(new MapCSSObject(node));
// interpret the results.
foreach (var rule in rules)
{
int zIndex;
if (!rule.TryGetProperty <int>("zIndex", out zIndex))
{
zIndex = 0;
}
float minZoom = (float)projection.ToZoomFactor(rule.MinZoom);
float maxZoom = (float)projection.ToZoomFactor(rule.MaxZoom);
uint?pointId = null;
int color;
if (rule.TryGetProperty <int>("color", out color))
{
float width;
if (rule.TryGetProperty <float>("width", out width))
{
pointId = scene.AddPoint(projection.LongitudeToX(node.Coordinate.Longitude),
projection.LatitudeToY(node.Coordinate.Latitude));
scene.AddStylePoint(pointId.Value, this.CalculateSceneLayer(OffsetPoint, zIndex), minZoom, maxZoom, color, width);
}
else
{
pointId = scene.AddPoint(projection.LongitudeToX(node.Coordinate.Longitude),
projection.LatitudeToY(node.Coordinate.Latitude));
scene.AddStylePoint(pointId.Value, this.CalculateSceneLayer(OffsetPoint, zIndex), minZoom, maxZoom, color, 1);
}
}
byte[] iconImage;
if (rule.TryGetProperty("iconImage", out iconImage))
{
if (!pointId.HasValue)
{
pointId = scene.AddPoint(projection.LongitudeToX(node.Coordinate.Longitude),
projection.LatitudeToY(node.Coordinate.Latitude));
}
// an icon is to be drawn!
ushort imageId = scene.AddImage(iconImage);
scene.AddIcon(pointId.Value, this.CalculateSceneLayer(OffsetPoint, zIndex), minZoom, maxZoom, imageId);
}
string text;
if (rule.TryGetProperty("text", out text))
{
int textColor;
if (!rule.TryGetProperty("textColor", out textColor))
{
textColor = SimpleColor.FromKnownColor(KnownColor.Black).Value;
}
int haloColor;
int?haloColorNullable = null;
if (rule.TryGetProperty("textHaloColor", out haloColor))
{
haloColorNullable = haloColor;
}
int haloRadius;
int?haloRadiusNullable = null;
if (rule.TryGetProperty("textHaloRadius", out haloRadius))
{
haloRadiusNullable = haloRadius;
}
int fontSize;
if (!rule.TryGetProperty("fontSize", out fontSize))
{
fontSize = 10;
}
string fontFamily;
if (!rule.TryGetProperty("fontFamily", out fontFamily))
{
fontFamily = "Arial"; // just some default font.
}
// a text is to be drawn.
string value;
if (node.Tags.TryGetValue(text, out value))
{
if (!pointId.HasValue)
{
pointId = scene.AddPoint(projection.LongitudeToX(node.Coordinate.Longitude),
projection.LatitudeToY(node.Coordinate.Latitude));
}
scene.AddText(pointId.Value, this.CalculateSceneLayer(OffsetPointText, zIndex), minZoom, maxZoom, fontSize, value, textColor,
haloColorNullable, haloRadiusNullable, fontFamily);
}
}
}
}
/// <summary>
/// Render the current complete scene.
/// </summary>
void Render()
{
try {
RectangleF rect = _rect;
lock (this.Map) {
//lock (_cacheRenderer) { // make sure only on thread at the same time is using the renderer.
// create the view.
View2D view = _cacheRenderer.Create((int)(rect.Width * _extra), (int)(rect.Height * _extra),
this.Map, (float)this.Map.Projection.ToZoomFactor(this.MapZoom),
this.MapCenter, _invertX, _invertY, this.MapTilt);
if (view.Equals(_previousRenderedZoom))
{
return;
}
if (rect.Width == 0) // only render if a proper size is known.
{
return;
}
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"Before lock.");
long before = DateTime.Now.Ticks;
// OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
// "Rendering Start");
// build the layers list.
var layers = new List <ILayer> ();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++)
{
layers.Add(this.Map [layerIdx]);
}
// add the internal layer.
// TODO: create marker layer.
int imageWidth = (int)(rect.Width * _extra * _scaleFactor);
int imageHeight = (int)(rect.Height * _extra * _scaleFactor);
// create a new bitmap context.
CGColorSpace space = CGColorSpace.CreateDeviceRGB();
int bytesPerPixel = 4;
int bytesPerRow = bytesPerPixel * imageWidth;
int bitsPerComponent = 8;
if (_bytescache == null)
{
_bytescache = new byte[bytesPerRow * imageHeight];
}
CGBitmapContext gctx = new CGBitmapContext(null, imageWidth, imageHeight,
bitsPerComponent, bytesPerRow,
space, // kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipLast
CGBitmapFlags.PremultipliedFirst | CGBitmapFlags.ByteOrder32Big);
// notify the map that the view has changed.
this.Map.ViewChanged((float)this.Map.Projection.ToZoomFactor(this.MapZoom), this.MapCenter,
view);
long afterViewChanged = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoom);
// does the rendering.
bool complete = _cacheRenderer.Render(new CGContextWrapper(gctx,
new RectangleF(0, 0, (int)(rect.Width * _extra), (int)(rect.Height * _extra))),
layers, view);
long afterRendering = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"Rendering took: {0}ms @ zoom level {1}",
(new TimeSpan(afterRendering - afterViewChanged).TotalMilliseconds), this.MapZoom);
if (complete) // there was no cancellation, the rendering completely finished.
// add the result to the scene cache.
{
lock (_cachedScene) {
// add the newly rendered image again.
_cachedScene.Clear();
_cachedScene.AddImage(0, float.MinValue, float.MaxValue, view.Rectangle, new byte[0], gctx.ToImage());
}
this.InvokeOnMainThread(InvalidateMap);
// store the previous view.
_previousRenderedZoom = view;
}
long after = DateTime.Now.Ticks;
// if (!complete) {
// OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,"Rendering CANCELLED!",
// new TimeSpan (after - before).TotalMilliseconds);
// } else {
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", System.Diagnostics.TraceEventType.Information,
"Rendering in {0}ms", new TimeSpan(after - before).TotalMilliseconds);
// }
//}
}
}
catch (Exception ex) {
_cacheRenderer.Reset();
}
}
/// <summary>
/// Called when the mapview has changed.
/// </summary>
/// <param name="map"></param>
/// <param name="zoomFactor"></param>
/// <param name="center"></param>
/// <param name="view"></param>
public void ViewChanged(Map map, float zoomFactor, GeoCoordinate center,
View2D view)
{
// calculate the current zoom level.
var zoomLevel = (int)System.Math.Round(map.Projection.ToZoomLevel(zoomFactor), 0);
// build the boundingbox.
var box = new GeoCoordinateBox(
map.Projection.ToGeoCoordinates(view.Left, view.Top),
map.Projection.ToGeoCoordinates(view.Right, view.Bottom));
// build the tile range.
TileRange range = TileRange.CreateAroundBoundingBox(box, zoomLevel);
DateTime now = DateTime.Now;
// build the new scene.
Scene2D newScene = new Scene2D();
if (_connection.State == System.Data.ConnectionState.Closed)
{
_connection.Open();
}
lock (_connection)
{ // make sure the connection is accessed synchronously.
// TODO: Investigate the SQLite multithreaded behaviour..
// TODO: this a very naive way of loading these tiles. Find a way to query SQLite more efficiently
// TODO: find a way to have some cached tiles.
foreach (var tile in range)
{
Tile invertTile = tile.InvertY();
SQLiteCommand command = new SQLiteCommand("SELECT * FROM tiles WHERE zoom_level = :zoom_level AND tile_column = :tile_column AND tile_row = :tile_row;",
_connection);
command.Parameters.AddWithValue("zoom_level", invertTile.Zoom);
command.Parameters.AddWithValue("tile_column", invertTile.X);
command.Parameters.AddWithValue("tile_row", invertTile.Y);
using (var tileReader = command.ExecuteReader())
{
while (tileReader.Read())
{
//Tile readTile = new Tile((int)tileReader["tile_column"],
// (int)tileReader["tile_row"], (int)tileReader["zoom_level"]);
float minZoom = (float)map.Projection.ToZoomFactor(tile.Zoom - 0.5f);
float maxZoom = (float)map.Projection.ToZoomFactor(tile.Zoom + 0.5f);
float left = (float)map.Projection.LongitudeToX(tile.TopLeft.Longitude);
float right = (float)map.Projection.LongitudeToX(tile.BottomRight.Longitude);
float bottom = (float)map.Projection.LatitudeToY(tile.BottomRight.Latitude);
float top = (float)map.Projection.LatitudeToY(tile.TopLeft.Latitude);
newScene.AddImage(0, minZoom, maxZoom, left, top, right, bottom,
(byte[])tileReader["tile_data"]);
}
}
}
this.Scene = newScene;
}
}
