/// <summary>
/// Draw square boxes around each area to approximate how they would behave in an offline app
/// </summary>
/// <param name="info">the image information for drawing</param>
/// <param name="items">the elements to draw.</param>
/// <returns>byte array of the generated .png tile image</returns>
public byte[] DrawOfflineEstimatedAreas(ImageStats info, List <DbTables.Place> items)
{
SKBitmap bitmap = new SKBitmap(info.imageSizeX, info.imageSizeY, SKColorType.Rgba8888, SKAlphaType.Premul);
SKCanvas canvas = new SKCanvas(bitmap);
var bgColor = SKColors.Transparent;
canvas.Clear(bgColor);
canvas.Scale(1, -1, info.imageSizeX / 2, info.imageSizeY / 2);
SKPaint fillpaint = new SKPaint();
fillpaint.IsAntialias = true;
fillpaint.Style = SKPaintStyle.Fill;
var strokePaint = new SKPaint();
strokePaint.Color = SKColors.Black;
strokePaint.TextSize = 32;
strokePaint.StrokeWidth = 3;
strokePaint.Style = SKPaintStyle.Stroke;
strokePaint.TextAlign = SKTextAlign.Center;
//TagParser.ApplyTags(items);
var placeInfo = PraxisCore.Standalone.Standalone.GetPlaceInfo(items.Where(i =>
i.IsGameElement
).ToList());
//this is for rectangles.
foreach (var pi in placeInfo)
{
var rect = PlaceInfoToRect(pi, info);
fillpaint.Color = SKColor.Parse(TagParser.PickStaticColorForArea(pi.Name));
canvas.DrawRect(rect, fillpaint);
canvas.DrawRect(rect, strokePaint);
}
canvas.Scale(1, -1, info.imageSizeX / 2, info.imageSizeY / 2); //inverts the inverted image again!
foreach (var pi in placeInfo)
{
var rect = PlaceInfoToRect(pi, info);
canvas.DrawText(pi.Name, rect.MidX, info.imageSizeY - rect.MidY, strokePaint);
}
var ms = new MemoryStream();
var skms = new SKManagedWStream(ms);
bitmap.Encode(skms, SKEncodedImageFormat.Png, 100);
var results = ms.ToArray();
skms.Dispose(); ms.Close(); ms.Dispose();
return(results);
}
/// <summary>
/// Take a path provided by a user, draw it as a maptile. Potentially useful for exercise trackers. Resulting file must not be saved to the server as that would be user tracking.
/// </summary>
/// <param name="pointListAsString">a string of points separate by , and | </param>
/// <returns>the png file with the path drawn over the mapdata in the area.</returns>
public byte[] DrawUserPath(string pointListAsString)
{
//String is formatted as Lat,Lon~Lat,Lon~ repeating. Characters chosen to not be percent-encoded if submitted as part of the URL.
//first, convert this to a list of latlon points
string[] pointToConvert = pointListAsString.Split("|");
List <Coordinate> coords = pointToConvert.Select(p => new Coordinate(double.Parse(p.Split(',')[0]), double.Parse(p.Split(',')[1]))).ToList();
var mapBuffer = resolutionCell8 / 2; //Leave some area around the edges of where they went.
GeoArea mapToDraw = new GeoArea(coords.Min(c => c.Y) - mapBuffer, coords.Min(c => c.X) - mapBuffer, coords.Max(c => c.Y) + mapBuffer, coords.Max(c => c.X) + mapBuffer);
ImageStats info = new ImageStats(mapToDraw, 1024, 1024);
LineString line = new LineString(coords.ToArray());
var drawableLine = PolygonToSKPoints(line, mapToDraw, info.degreesPerPixelX, info.degreesPerPixelY);
//Now, draw that path on the map.
var places = GetPlaces(mapToDraw); //, null, false, false, degreesPerPixelX * 4 ///TODO: restore item filtering
var baseImage = DrawAreaAtSize(info, places);
SKBitmap sKBitmap = SKBitmap.Decode(baseImage);
SKCanvas canvas = new SKCanvas(sKBitmap);
SKPaint paint = new SKPaint();
paint.Style = SKPaintStyle.Stroke;
paint.StrokeWidth = 4; //Larger than normal lines at any zoom level.
paint.Color = new SKColor(0, 0, 0); //Pure black, for maximum visibility.
for (var x = 0; x < drawableLine.Length - 1; x++)
{
canvas.DrawLine(drawableLine[x], drawableLine[x + 1], paint);
}
var ms = new MemoryStream();
var skms = new SKManagedWStream(ms);
sKBitmap.Encode(skms, SKEncodedImageFormat.Png, 100);
var results = ms.ToArray();
skms.Dispose(); ms.Close(); ms.Dispose();
return(results);
}
public byte[] DrawAreaAtSize(ImageStats stats, List <CompletePaintOp> paintOps)
{
//This is the new core drawing function. Once the paint operations have been created, I just draw them here.
//baseline image data stuff
SKBitmap bitmap = new SKBitmap(stats.imageSizeX, stats.imageSizeY, SKColorType.Rgba8888, SKAlphaType.Premul);
SKCanvas canvas = new SKCanvas(bitmap);
canvas.Clear(eraser.Color);
canvas.Scale(1, -1, stats.imageSizeX / 2, stats.imageSizeY / 2);
SKPaint paint = new SKPaint();
foreach (var w in paintOps.OrderByDescending(p => p.paintOp.LayerId).ThenByDescending(p => p.areaSize))
{
paint = cachedPaints[w.paintOp.Id]; //SetPaintForTPP(w.paintOp); // w.paintOp.paint;
if (w.paintOp.FromTag) //FromTag is for when you are saving color data directly to each element, instead of tying it to a styleset.
{
paint.Color = SKColor.Parse(w.tagValue);
}
if (w.paintOp.Randomize) //To randomize the color on every Draw call.
{
paint.Color = new SKColor((byte)r.Next(0, 255), (byte)r.Next(0, 255), (byte)r.Next(0, 255), 99);
}
paint.StrokeWidth = (float)w.lineWidthPixels;
var path = new SKPath();
switch (w.elementGeometry.GeometryType)
{
case "Polygon":
var p = w.elementGeometry as Polygon;
//if (p.Envelope.Length < (stats.degreesPerPixelX * 4)) //This poly's perimeter is too small to draw
//continue;
path.AddPoly(PolygonToSKPoints(p.ExteriorRing, stats.area, stats.degreesPerPixelX, stats.degreesPerPixelY));
foreach (var ir in p.Holes)
{
//if (ir.Envelope.Length < (w.lineWidth * 4)) //This poly's perimeter is less than 2x2 pixels in size.
//continue;
path.AddPoly(PolygonToSKPoints(ir, stats.area, stats.degreesPerPixelX, stats.degreesPerPixelY));
}
canvas.DrawPath(path, paint);
break;
case "MultiPolygon":
foreach (var p2 in ((MultiPolygon)w.elementGeometry).Geometries)
{
//if (p2.Envelope.Length < (stats.degreesPerPixelX * 4)) //This poly's perimeter is too small to draw
//continue;
var p2p = p2 as Polygon;
path.AddPoly(PolygonToSKPoints(p2p.ExteriorRing, stats.area, stats.degreesPerPixelX, stats.degreesPerPixelY));
foreach (var ir in p2p.Holes)
{
//if (ir.Envelope.Length < (stats.degreesPerPixelX * 4)) //This poly's perimeter is too small to draw
// continue;
path.AddPoly(PolygonToSKPoints(ir, stats.area, stats.degreesPerPixelX, stats.degreesPerPixelY));
}
canvas.DrawPath(path, paint);
}
break;
case "LineString":
var firstPoint = w.elementGeometry.Coordinates.First();
var lastPoint = w.elementGeometry.Coordinates.Last();
var points = PolygonToSKPoints(w.elementGeometry, stats.area, stats.degreesPerPixelX, stats.degreesPerPixelY);
if (firstPoint.Equals(lastPoint))
{
//This is a closed shape. Check to see if it's supposed to be filled in.
if (paint.Style == SKPaintStyle.Fill)
{
path.AddPoly(points);
canvas.DrawPath(path, paint);
continue;
}
}
//if (w.lineWidth < 1) //Don't draw lines we can't see.
//continue;
for (var line = 0; line < points.Length - 1; line++)
{
canvas.DrawLine(points[line], points[line + 1], paint);
}
break;
case "MultiLineString":
//if (w.lineWidth < 1) //Don't draw lines we can't see.
//continue;
foreach (var p3 in ((MultiLineString)w.elementGeometry).Geometries)
{
var points2 = PolygonToSKPoints(p3, stats.area, stats.degreesPerPixelX, stats.degreesPerPixelY);
for (var line = 0; line < points2.Length - 1; line++)
{
canvas.DrawLine(points2[line], points2[line + 1], paint);
}
}
break;
case "Point":
var convertedPoint = PolygonToSKPoints(w.elementGeometry, stats.area, stats.degreesPerPixelX, stats.degreesPerPixelY);
//If this type has an icon, use it. Otherwise draw a circle in that type's color.
if (!string.IsNullOrEmpty(w.paintOp.FileName))
{
SKBitmap icon = SKBitmap.Decode(TagParser.cachedBitmaps[w.paintOp.FileName]); //TODO optimize by making icons in Initialize.
canvas.DrawBitmap(icon, convertedPoint[0]);
}
else
{
var circleRadius = (float)(ConstantValues.resolutionCell10 / stats.degreesPerPixelX / 2); //I want points to be drawn as 1 Cell10 in diameter.
canvas.DrawCircle(convertedPoint[0], circleRadius, paint);
//TODO re-add outline paint to this DLL not TagParser.
//canvas.DrawCircle(convertedPoint[0], circleRadius, TagParser.outlinePaint);
}
break;
default:
Log.WriteLog("Unknown geometry type found, not drawn.");
break;
}
}
//}
var ms = new MemoryStream();
var skms = new SKManagedWStream(ms);
bitmap.Encode(skms, SKEncodedImageFormat.Png, 100);
var results = ms.ToArray();
skms.Dispose(); ms.Close(); ms.Dispose();
return(results);
}
