/// <summary>
/// Raises the draw event.
/// </summary>
/// <param name="canvas">Canvas.</param>
protected override void OnDraw(global::Android.Graphics.Canvas canvas)
{
base.OnDraw(canvas);
// set the height/width.
if (_surfaceHeight != canvas.Height ||
_surfaceWidth != canvas.Width)
{
_surfaceHeight = canvas.Height;
_surfaceWidth = canvas.Width;
// trigger rendering.
this.TriggerRendering();
}
// render only the cached scene.
canvas.DrawColor(new global::Android.Graphics.Color(_backgroundColor));
View2D view = this.CreateView();
float zoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
_renderer.SceneRenderer.Render(
canvas,
view,
zoomFactor,
new Primitive2D[] { _onScreenBuffer });
}
/// <summary>
/// Raises the draw event.
/// </summary>
/// <param name="canvas">Canvas.</param>
protected override void OnDraw(global::Android.Graphics.Canvas canvas)
{
base.OnDraw(canvas);
// render only the cached scene.
lock (_scene)
{
canvas.DrawColor(new global::Android.Graphics.Color(_scene.BackColor));
_renderer.SceneRenderer.Render(
canvas,
_scene,
this.CreateView());
}
}
/// <summary>
/// Raises the draw event.
/// </summary>
/// <param name="canvas">Canvas.</param>
protected override void OnDraw(global::Android.Graphics.Canvas canvas)
{
try
{
base.OnDraw(canvas);
if (_renderingSuspended)
{ // do nothing when rendering is suspended.
return;
}
// set the height/width.
if (_surfaceHeight != canvas.Height ||
_surfaceWidth != canvas.Width)
{
_surfaceHeight = canvas.Height;
_surfaceWidth = canvas.Width;
// make sure markers are in the correct position too.
_mapView.NotifyMapChange(this.SurfaceWidth, this.SurfaceHeight, this.CreateView(), this.Map.Projection);
// trigger rendering.
this.TriggerRendering();
// raise map initialized.
_mapView.RaiseMapInitialized();
}
if (_onScreenBuffer != null)
{ // there is a buffer.
// render only the cached scene.
canvas.DrawColor(new global::Android.Graphics.Color(_backgroundColor));
View2D view = this.CreateView();
float zoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
_renderer.SceneRenderer.Render(
canvas,
view,
zoomFactor,
new Primitive2D[] { _onScreenBuffer });
}
}
catch (Exception ex)
{
OsmSharp.Logging.Log.TraceEvent("MapViewSurface", TraceEventType.Critical,
string.Format("An unhandled exception occured:{0}", ex.ToString()));
}
}
/// <summary>
/// Raises the draw event.
/// </summary>
/// <param name="canvas">Canvas.</param>
protected override void OnDraw(global::Android.Graphics.Canvas canvas)
{
base.OnDraw(canvas);
// long before = DateTime.Now.Ticks;
// render only the cached scene.
lock (_scene)
{
// OsmSharp.IO.Output.OutputStreamHost.WriteLine ("OnDraw");
canvas.DrawColor(new global::Android.Graphics.Color(_scene.BackColor));
_renderer.SceneRenderer.Render(
canvas,
_scene,
_renderer.Create(canvas.Width, canvas.Height,
this.Map, (float)this.Map.Projection.ToZoomFactor(this.MapZoomLevel), this.MapCenter, _invertX, _invertY));
}
// long after = DateTime.Now.Ticks;
// OsmSharp.IO.Output.OutputStreamHost.WriteLine(string.Format("Rendering in {0}ms",
// new TimeSpan (after - before).TotalMilliseconds));
}
/// <summary>
/// Renders the current complete scene.
/// </summary>
private void Render()
{
try
{
if (_renderingSuspended)
{ // no rendering when rendering is suspended.
return;
}
if (_cacheRenderer.IsRunning)
{ // cancel previous render.
_cacheRenderer.CancelAndWait();
}
// make sure only on thread at the same time is using the renderer.
lock (_cacheRenderer)
{
this.Map.ViewChangedCancel();
// build the layers list.
var layers = new List<Layer>();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++)
{ // get the layer.
if (this.Map[layerIdx].IsVisible)
{
layers.Add(this.Map[layerIdx]);
}
}
// add the internal layers.
layers.Add(_makerLayer);
if (this.SurfaceHeight == 0)
{ // the surface has no height yet. Impossible to render like this.
return;
}
// get old image if available.
NativeImage image = null;
if (_offScreenBuffer != null)
{ // get the native image from the off-screen buffer.
image = _offScreenBuffer.NativeImage as NativeImage;
}
// resize image if needed.
float sizeX = this.SurfaceWidth;
float sizeY = this.SurfaceHeight;
//if(this.MapAllowTilt)
//{ // when rotation is allowed make sure a square is rendered.
// sizeX = System.Math.Max(this.SurfaceWidth, this.SurfaceHeight);
// sizeY = System.Math.Max(this.SurfaceWidth, this.SurfaceHeight);
//}
// float size = System.Math.Max(this.SurfaceHeight, this.SurfaceWidth);
if (image == null ||
image.Image.Width != (int)(sizeX * _extra) ||
image.Image.Height != (int)(sizeY * _extra))
{ // create a bitmap and render there.
if (image != null)
{ // make sure to dispose the old image.
image.Dispose();
}
image = new NativeImage(global::Android.Graphics.Bitmap.CreateBitmap((int)(sizeX * _extra),
(int)(sizeY * _extra),
global::Android.Graphics.Bitmap.Config.Argb8888));
}
// create and reset the canvas.
using (var canvas = new global::Android.Graphics.Canvas(image.Image))
{
canvas.DrawColor(new global::Android.Graphics.Color(
SimpleColor.FromKnownColor(KnownColor.White).Value));
// create the view.
double[] sceneCenter = this.Map.Projection.ToPixel(this.MapCenter.Latitude, this.MapCenter.Longitude);
float mapZoom = this.MapZoom;
float sceneZoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
// create the view for this control.
float scaledNormalWidth = image.Image.Width / _bufferFactor;
float scaledNormalHeight = image.Image.Height / _bufferFactor;
var view = View2D.CreateFrom((float)sceneCenter[0], (float)sceneCenter[1],
scaledNormalWidth * _extra, scaledNormalHeight * _extra, sceneZoomFactor,
_invertX, _invertY, this.MapTilt);
long before = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"Rendering Start");
// notify the map that the view has changed.
if (_previouslyChangedView == null ||
!_previouslyChangedView.Equals(view))
{ // report change once!
var normalView = View2D.CreateFrom((float)sceneCenter[0], (float)sceneCenter[1],
scaledNormalWidth, scaledNormalHeight, sceneZoomFactor,
_invertX, _invertY, this.MapTilt);
this.Map.ViewChanged((float)this.Map.Projection.ToZoomFactor(this.MapZoom), this.MapCenter,
normalView, view);
_previouslyChangedView = view;
long afterViewChanged = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoom);
}
// does the rendering.
_cacheRenderer.Density = this.MapScaleFactor;
bool complete = _cacheRenderer.Render(canvas, _map.Projection, layers, view, (float)this.Map.Projection.ToZoomFactor(this.MapZoom));
long afterRendering = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"Rendering took: {0}ms @ zoom level {1} and {2}",
(new TimeSpan(afterRendering - before).TotalMilliseconds), this.MapZoom, this.MapCenter);
if (complete)
{ // there was no cancellation, the rendering completely finished.
// add the result to the scene cache.
// add the newly rendered image again.
if (_offScreenBuffer == null)
{ // create the offscreen buffer first.
_offScreenBuffer = new ImageTilted2D(view.Rectangle, image, float.MinValue, float.MaxValue);
}
else
{ // augment the previous buffer.
_offScreenBuffer.Bounds = view.Rectangle;
_offScreenBuffer.NativeImage = image;
}
var temp = _onScreenBuffer;
_onScreenBuffer = _offScreenBuffer;
_offScreenBuffer = temp;
}
long after = DateTime.Now.Ticks;
if (complete)
{ // report a successful render to listener.
_listener.NotifyRenderSuccess(view, mapZoom, (int)new TimeSpan(after - before).TotalMilliseconds);
}
}
}
// notify the the current surface of the new rendering.
this.PostInvalidate();
}
catch (Exception ex)
{ // exceptions can be thrown when the mapview is disposed while rendering.
// don't worry too much about these, the mapview is garbage anyway.
OsmSharp.Logging.Log.TraceEvent("MapViewSurface", TraceEventType.Critical,
string.Format("An unhandled exception occured:{0}", ex.ToString()));
}
}
/// <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>
/// 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.
double[] sceneCenter = this.Map.Projection.ToPixel(this.MapCenter.Latitude, this.MapCenter.Longitude);
float sceneZoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
// create the view for this control.
View2D view = View2D.CreateFrom((float)sceneCenter[0], (float)sceneCenter[1],
this.Width * extra, this.Height * extra, sceneZoomFactor,
_invertX, _invertY, this.MapTilt);
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.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);
// add the current canvas to the scene.
_scene.AddImage (-1, float.MaxValue, float.MinValue, view.Rectangle,
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.MapZoom);
if(complete)
{ // there was no cancellation, the rendering completely finished.
// add the result to the scene cache.
lock (_scene) {
// add the newly rendered image again.
_scene.Clear ();
_scene.AddImage (0, float.MinValue, float.MaxValue, view.Rectangle, 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;
}
}
/// <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.
double[] sceneCenter = this.Map.Projection.ToPixel(this.MapCenter.Latitude, this.MapCenter.Longitude);
float sceneZoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
// create the view for this control.
View2D view = View2D.CreateFrom((float)sceneCenter[0], (float)sceneCenter[1],
this.Width * extra, this.Height * extra, sceneZoomFactor,
_invertX, _invertY, this.MapTilt);
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.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);
// add the current canvas to the scene.
_scene.AddImage(-1, float.MaxValue, float.MinValue, view.Rectangle,
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.MapZoom);
if (complete)
{ // there was no cancellation, the rendering completely finished.
// add the result to the scene cache.
lock (_scene) {
// add the newly rendered image again.
_scene.Clear();
_scene.AddImage(0, float.MinValue, float.MaxValue, view.Rectangle, 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;
}
}
/// <summary>
/// Renders the current complete scene.
/// </summary>
private void Render()
{
if (_cacheRenderer.IsRunning) {
_cacheRenderer.CancelAndWait ();
}
// make sure only on thread at the same time is using the renderer.
lock (_cacheRenderer)
{
this.Map.ViewChangedCancel();
// build the layers list.
var layers = new List<Layer> ();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++) {
// get the layer.
layers.Add (this.Map[layerIdx]);
}
// add the internal layers.
layers.Add (_makerLayer);
// get old image if available.
global::Android.Graphics.Bitmap image = null;
if (_offScreenBuffer != null)
{
image = _offScreenBuffer.Tag as global::Android.Graphics.Bitmap;
}
if (this.SurfaceHeight == 0)
{
return;
}
// resize image if needed.
float size = System.Math.Max(this.SurfaceHeight, this.SurfaceWidth);
if (image == null ||
image.Width != (int)(size * _extra) ||
image.Height != (int)(size * _extra))
{ // create a bitmap and render there.
image = global::Android.Graphics.Bitmap.CreateBitmap((int)(size * _extra),
(int)(size * _extra),
global::Android.Graphics.Bitmap.Config.Argb8888);
}
// create and reset the canvas.
global::Android.Graphics.Canvas canvas = new global::Android.Graphics.Canvas (image);
canvas.DrawColor (new global::Android.Graphics.Color(
SimpleColor.FromKnownColor(KnownColor.White).Value));
// create the view.
double[] sceneCenter = this.Map.Projection.ToPixel(this.MapCenter.Latitude, this.MapCenter.Longitude);
float mapZoom = this.MapZoom;
float sceneZoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
// create the view for this control.
View2D view = View2D.CreateFrom((float)sceneCenter[0], (float)sceneCenter[1],
size * _extra, size * _extra, sceneZoomFactor,
_invertX, _invertY, this.MapTilt);
long before = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"Rendering Start");
// 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", TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoom);
// does the rendering.
bool complete = _cacheRenderer.Render(canvas, layers, view, (float)this.Map.Projection.ToZoomFactor(this.MapZoom));
long afterRendering = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", 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.
// add the newly rendered image again.
_offScreenBuffer = new ImageTilted2D(view.Rectangle, new byte[0], float.MinValue, float.MaxValue);
_offScreenBuffer.Tag = image;
var temp = _onScreenBuffer;
_onScreenBuffer = _offScreenBuffer;
_offScreenBuffer = temp;
}
// notify the the current surface of the new rendering.
this.PostInvalidate();
long after = DateTime.Now.Ticks;
if (complete)
{ // report a successfull render to listener.
_listener.NotifyRenderSuccess(view, mapZoom, (int)new TimeSpan(after - before).TotalMilliseconds);
}
}
}
/// <summary>
/// Renders the current complete scene.
/// </summary>
private void Render()
{
try
{
if (_renderingSuspended)
{ // no rendering when rendering is suspended.
return;
}
if (_cacheRenderer.IsRunning)
{ // cancel previous render.
_cacheRenderer.CancelAndWait();
}
// make sure only on thread at the same time is using the renderer.
lock (_cacheRenderer)
{
this.Map.ViewChangedCancel();
// build the layers list.
var layers = new List <Layer>();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++)
{ // get the layer.
if (this.Map[layerIdx].IsVisible)
{
layers.Add(this.Map[layerIdx]);
}
}
// add the internal layers.
layers.Add(_makerLayer);
if (this.SurfaceHeight == 0)
{ // the surface has no height yet. Impossible to render like this.
return;
}
// get old image if available.
NativeImage image = null;
if (_offScreenBuffer != null)
{ // get the native image from the off-screen buffer.
image = _offScreenBuffer.NativeImage as NativeImage;
}
// resize image if needed.
float sizeX = this.SurfaceWidth;
float sizeY = this.SurfaceHeight;
//if(this.MapAllowTilt)
//{ // when rotation is allowed make sure a square is rendered.
// sizeX = System.Math.Max(this.SurfaceWidth, this.SurfaceHeight);
// sizeY = System.Math.Max(this.SurfaceWidth, this.SurfaceHeight);
//}
// float size = System.Math.Max(this.SurfaceHeight, this.SurfaceWidth);
if (image == null ||
image.Image.Width != (int)(sizeX * _extra) ||
image.Image.Height != (int)(sizeY * _extra))
{ // create a bitmap and render there.
if (image != null)
{ // make sure to dispose the old image.
image.Dispose();
}
image = new NativeImage(global::Android.Graphics.Bitmap.CreateBitmap((int)(sizeX * _extra),
(int)(sizeY * _extra),
global::Android.Graphics.Bitmap.Config.Argb8888));
}
// create and reset the canvas.
using (var canvas = new global::Android.Graphics.Canvas(image.Image))
{
canvas.DrawColor(new global::Android.Graphics.Color(
SimpleColor.FromKnownColor(KnownColor.White).Value));
// create the view.
double[] sceneCenter = this.Map.Projection.ToPixel(this.MapCenter.Latitude, this.MapCenter.Longitude);
float mapZoom = this.MapZoom;
float sceneZoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
// create the view for this control.
float scaledNormalWidth = image.Image.Width / _bufferFactor;
float scaledNormalHeight = image.Image.Height / _bufferFactor;
var view = View2D.CreateFrom((float)sceneCenter[0], (float)sceneCenter[1],
scaledNormalWidth * _extra, scaledNormalHeight * _extra, sceneZoomFactor,
_invertX, _invertY, this.MapTilt);
long before = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"Rendering Start");
// notify the map that the view has changed.
if (_previouslyChangedView == null ||
!_previouslyChangedView.Equals(view))
{ // report change once!
var normalView = View2D.CreateFrom((float)sceneCenter[0], (float)sceneCenter[1],
scaledNormalWidth, scaledNormalHeight, sceneZoomFactor,
_invertX, _invertY, this.MapTilt);
this.Map.ViewChanged((float)this.Map.Projection.ToZoomFactor(this.MapZoom), this.MapCenter,
normalView, view);
_previouslyChangedView = view;
long afterViewChanged = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoom);
}
// does the rendering.
bool complete = _cacheRenderer.Render(canvas, layers, view, (float)this.Map.Projection.ToZoomFactor(this.MapZoom));
long afterRendering = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"Rendering took: {0}ms @ zoom level {1} and {2}",
(new TimeSpan(afterRendering - before).TotalMilliseconds), this.MapZoom, this.MapCenter);
if (complete)
{ // there was no cancellation, the rendering completely finished.
// add the result to the scene cache.
// add the newly rendered image again.
if (_offScreenBuffer == null)
{ // create the offscreen buffer first.
_offScreenBuffer = new ImageTilted2D(view.Rectangle, image, float.MinValue, float.MaxValue);
}
else
{ // augment the previous buffer.
_offScreenBuffer.Bounds = view.Rectangle;
_offScreenBuffer.NativeImage = image;
}
var temp = _onScreenBuffer;
_onScreenBuffer = _offScreenBuffer;
_offScreenBuffer = temp;
}
long after = DateTime.Now.Ticks;
if (complete)
{ // report a successful render to listener.
_listener.NotifyRenderSuccess(view, mapZoom, (int)new TimeSpan(after - before).TotalMilliseconds);
}
}
}
// notify the the current surface of the new rendering.
this.PostInvalidate();
}
catch (Exception ex)
{ // exceptions can be thrown when the mapview is disposed while rendering.
// don't worry too much about these, the mapview is garbage anyway.
OsmSharp.Logging.Log.TraceEvent("MapViewSurface", TraceEventType.Critical,
string.Format("An unhandled exception occured:{0}", ex.ToString()));
}
}
/// <summary>
/// Renders the current complete scene.
/// </summary>
private void Render()
{
if (_cacheRenderer.IsRunning)
{
_cacheRenderer.CancelAndWait();
}
// make sure only on thread at the same time is using the renderer.
lock (_cacheRenderer)
{
this.Map.ViewChangedCancel();
// build the layers list.
var layers = new List <Layer> ();
for (int layerIdx = 0; layerIdx < this.Map.LayerCount; layerIdx++)
{
// get the layer.
layers.Add(this.Map[layerIdx]);
}
// add the internal layers.
layers.Add(_makerLayer);
// get old image if available.
global::Android.Graphics.Bitmap image = null;
if (_offScreenBuffer != null)
{
image = _offScreenBuffer.Tag as global::Android.Graphics.Bitmap;
}
if (this.SurfaceHeight == 0)
{
return;
}
// resize image if needed.
float size = System.Math.Max(this.SurfaceHeight, this.SurfaceWidth);
if (image == null ||
image.Width != (int)(size * _extra) ||
image.Height != (int)(size * _extra))
{ // create a bitmap and render there.
image = global::Android.Graphics.Bitmap.CreateBitmap((int)(size * _extra),
(int)(size * _extra),
global::Android.Graphics.Bitmap.Config.Argb8888);
}
// create and reset the canvas.
global::Android.Graphics.Canvas canvas = new global::Android.Graphics.Canvas(image);
canvas.DrawColor(new global::Android.Graphics.Color(
SimpleColor.FromKnownColor(KnownColor.White).Value));
// create the view.
double[] sceneCenter = this.Map.Projection.ToPixel(this.MapCenter.Latitude, this.MapCenter.Longitude);
float mapZoom = this.MapZoom;
float sceneZoomFactor = (float)this.Map.Projection.ToZoomFactor(this.MapZoom);
// create the view for this control.
View2D view = View2D.CreateFrom((float)sceneCenter[0], (float)sceneCenter[1],
size * _extra, size * _extra, sceneZoomFactor,
_invertX, _invertY, this.MapTilt);
long before = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", TraceEventType.Information,
"Rendering Start");
// 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", TraceEventType.Information,
"View change took: {0}ms @ zoom level {1}",
(new TimeSpan(afterViewChanged - before).TotalMilliseconds), this.MapZoom);
// does the rendering.
bool complete = _cacheRenderer.Render(canvas, layers, view, (float)this.Map.Projection.ToZoomFactor(this.MapZoom));
long afterRendering = DateTime.Now.Ticks;
OsmSharp.Logging.Log.TraceEvent("OsmSharp.Android.UI.MapView", 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.
// add the newly rendered image again.
_offScreenBuffer = new ImageTilted2D(view.Rectangle, new byte[0], float.MinValue, float.MaxValue);
_offScreenBuffer.Tag = image;
var temp = _onScreenBuffer;
_onScreenBuffer = _offScreenBuffer;
_offScreenBuffer = temp;
}
// notify the the current surface of the new rendering.
this.PostInvalidate();
long after = DateTime.Now.Ticks;
if (complete)
{ // report a successfull render to listener.
_listener.NotifyRenderSuccess(view, mapZoom, (int)new TimeSpan(after - before).TotalMilliseconds);
}
}
}