/// <summary>
///
/// </summary>
/// <param name="layers">The layers to query for MapInfo</param>
/// <param name="viewport">The current Viewport</param>
/// <param name="screenPosition">The screenposition to query</param>
/// <param name="symbolCache">The </param>
/// <param name="margin">Margin of error in pixels. If the distance between screen position and geometry
/// is smaller than the margin it is seen as a hit.</param>
/// <returns></returns>
public static MapInfo GetMapInfo(IEnumerable <ILayer> layers, IReadOnlyViewport viewport, Point screenPosition,
ISymbolCache symbolCache, int margin = 0)
{
var worldPosition = viewport.ScreenToWorld(screenPosition);
return(GetMapInfo(layers, worldPosition, screenPosition, viewport.Resolution, symbolCache, margin));
}
public MapInfo GetMapInfo(double x, double y, IReadOnlyViewport viewport, IEnumerable <ILayer> layers, int margin = 0)
{
// todo: use margin to increase the pixel area
// todo: We will need to select on style instead of layer
layers = layers
.Select(l => (l is RasterizingLayer rl) ? rl.ChildLayer : l)
.Where(l => l.IsMapInfoLayer);
var list = new List <MapInfoRecord>();
var result = new MapInfo()
{
ScreenPosition = new Point(x, y),
WorldPosition = viewport.ScreenToWorld(x, y),
Resolution = viewport.Resolution
};
try
{
var width = (int)viewport.Width;
var height = (int)viewport.Height;
var imageInfo = new SKImageInfo(width, height, SKImageInfo.PlatformColorType, SKAlphaType.Unpremul);
var intX = (int)x;
var intY = (int)y;
using (var surface = SKSurface.Create(imageInfo))
{
if (surface == null)
{
return(null);
}
surface.Canvas.ClipRect(new SKRect((float)(x - 1), (float)(y - 1), (float)(x + 1), (float)(y + 1)));
surface.Canvas.Clear(SKColors.Transparent);
var pixmap = surface.PeekPixels();
var color = pixmap.GetPixelColor(intX, intY);
VisibleFeatureIterator.IterateLayers(viewport, layers, (v, layer, style, feature, opacity) => {
surface.Canvas.Save();
// 1) Clear the entire bitmap
surface.Canvas.Clear(SKColors.Transparent);
// 2) Render the feature to the clean canvas
RenderFeature(surface.Canvas, v, layer, style, feature, opacity);
// 3) Check if the pixel has changed.
if (color != pixmap.GetPixelColor(intX, intY))
{
// 4) Add feature and style to result
list.Add(new MapInfoRecord(feature, style, layer));
}
surface.Canvas.Restore();
});
}
if (list.Count == 0)
{
return(result);
}
list.Reverse();
var itemDrawnOnTop = list.First();
result.Feature = itemDrawnOnTop.Feature;
result.Style = itemDrawnOnTop.Style;
result.Layer = itemDrawnOnTop.Layer;
result.MapInfoRecords = list;
}
catch (Exception exception)
{
Logger.Log(LogLevel.Error, "Unexpected error in skia renderer", exception);
}
return(result);
}
public void Draw(SKCanvas canvas, IReadOnlyViewport viewport, IWidget widget, float layerOpacity)
{
canvas.RotateDegrees((float)viewport.Rotation, 0.0f, 0.0f);
var TL = viewport.ScreenToWorld(canvas.LocalClipBounds.Left, canvas.LocalClipBounds.Top);
var BR = viewport.ScreenToWorld(canvas.LocalClipBounds.Right, canvas.LocalClipBounds.Bottom);
var width = viewport.Extent.Width;
var height = viewport.Extent.Height;
var usedLineOffset = lineOffset;
IEnumerable <SKPaint> usedPaints = paints;
if (viewport.Resolution > 0.5)
{
usedLineOffset *= 10;
usedPaints = usedPaints.Skip(1).ToArray();
}
if (viewport.Resolution > 3)
{
usedLineOffset *= 10;
usedPaints = usedPaints.Skip(1).ToArray();
}
int lineCount100M = (int)(100 / usedLineOffset);
//How many lines are 1000m
int lineCount1000M = (int)(1000 / usedLineOffset);
if (lineCount100M == 0)
{
lineCount100M = 9000; //will never be reached, if we only render 1k's
}
double screenWidthPerLine = canvas.LocalClipBounds.Width / (width / usedLineOffset);
double screenHeightPerLine = canvas.LocalClipBounds.Height / (height / usedLineOffset);
//World coordinates of first lineOffset line
var first100mW = (TL.X + (usedLineOffset - TL.X % usedLineOffset));
var first100mH = (TL.Y + (usedLineOffset - TL.Y % usedLineOffset));
//Screen offset of first lineOffset line
double offsetCW = ((first100mW - TL.X) / usedLineOffset) * screenWidthPerLine;
double offsetCH = screenHeightPerLine + ((TL.Y - first100mH) / usedLineOffset) * screenHeightPerLine;
//offset of next 1k
int KOffsetW = (int)((first100mW % 1000) / usedLineOffset);
if (KOffsetW < 0)
{
KOffsetW = 10 + KOffsetW;
}
int KOffsetH = (int)((first100mH % 1000) / usedLineOffset) - 1;
if (lineCount1000M > 1)
{
KOffsetH = lineCount1000M - KOffsetH;
}
for (double curX = offsetCW; curX < canvas.LocalClipBounds.Right; curX += screenWidthPerLine)
{
SKPaint paint;
if (KOffsetW >= 100 && KOffsetW % 100 == 0)
{
paint = usedPaints.ElementAt(2);
}
else if (KOffsetW >= 10 && KOffsetW % 10 == 0)
{
paint = usedPaints.ElementAt(1);
}
else
{
paint = usedPaints.ElementAt(0);
}
if (KOffsetW == lineCount1000M)
{
KOffsetW = 0;
}
canvas.DrawLine((float)curX, 0, (float)curX, canvas.LocalClipBounds.Height, paint);
KOffsetW++;
}
for (double curH = offsetCH; curH < canvas.LocalClipBounds.Bottom; curH += screenHeightPerLine)
{
SKPaint paint;
if (KOffsetH >= 100 && KOffsetH % 100 == 0)
{
paint = usedPaints.ElementAt(2);
}
else if (KOffsetH >= 10 && KOffsetH % 10 == 0)
{
paint = usedPaints.ElementAt(1);
}
else
{
paint = usedPaints.ElementAt(0);
}
if (KOffsetH == lineCount1000M)
{
KOffsetH = 0;
}
canvas.DrawLine(0, (float)curH, canvas.LocalClipBounds.Width, (float)curH, paint);
KOffsetH++;
}
}
public MapInfo?GetMapInfo(double x, double y, IReadOnlyViewport viewport, IEnumerable <ILayer> layers, int margin = 0)
{
// todo: use margin to increase the pixel area
// todo: We will need to select on style instead of layer
layers = layers
.Select(l => (l is ISourceLayer sl) ? sl.SourceLayer : l)
.Where(l => l.IsMapInfoLayer);
var list = new List <MapInfoRecord>();
var result = new MapInfo
{
ScreenPosition = new MPoint(x, y),
WorldPosition = viewport.ScreenToWorld(x, y),
Resolution = viewport.Resolution
};
if (!viewport.Extent?.Contains(viewport.ScreenToWorld(result.ScreenPosition)) ?? false)
{
return(result);
}
try
{
var width = (int)viewport.Width;
var height = (int)viewport.Height;
var imageInfo = new SKImageInfo(width, height, SKImageInfo.PlatformColorType, SKAlphaType.Unpremul);
var intX = (int)x;
var intY = (int)y;
if (intX >= width || intY >= height)
{
return(result);
}
using (var surface = SKSurface.Create(imageInfo))
{
if (surface == null)
{
return(null);
}
surface.Canvas.ClipRect(new SKRect((float)(x - 1), (float)(y - 1), (float)(x + 1), (float)(y + 1)));
surface.Canvas.Clear(SKColors.Transparent);
using var pixmap = surface.PeekPixels();
var color = pixmap.GetPixelColor(intX, intY);
VisibleFeatureIterator.IterateLayers(viewport, layers, 0, (v, layer, style, feature, opacity, iteration) => {
// ReSharper disable AccessToDisposedClosure // There is no delayed fetch. After IterateLayers returns all is done. I do not see a problem.
surface.Canvas.Save();
// 1) Clear the entire bitmap
surface.Canvas.Clear(SKColors.Transparent);
// 2) Render the feature to the clean canvas
RenderFeature(surface.Canvas, v, layer, style, feature, opacity, 0);
// 3) Check if the pixel has changed.
if (color != pixmap.GetPixelColor(intX, intY))
{
// 4) Add feature and style to result
list.Add(new MapInfoRecord(feature, style, layer));
}
surface.Canvas.Restore();
// ReSharper restore AccessToDisposedClosure
});
}
if (list.Count == 0)
{
return(result);
}
list.Reverse();
var itemDrawnOnTop = list.First();
result.Feature = itemDrawnOnTop.Feature;
result.Style = itemDrawnOnTop.Style;
result.Layer = itemDrawnOnTop.Layer;
result.MapInfoRecords = list;
}
catch (Exception exception)
{
Logger.Log(LogLevel.Error, "Unexpected error in skia renderer", exception);
}
return(result);
}
public void Draw(SKCanvas canvas, IReadOnlyViewport viewport, IWidget widget, float layerOpacity)
{
canvas.RotateDegrees((float)viewport.Rotation, 0.0f, 0.0f);
var TL = viewport.ScreenToWorld(canvas.LocalClipBounds.Left, canvas.LocalClipBounds.Top);
var BR = viewport.ScreenToWorld(canvas.LocalClipBounds.Right, canvas.LocalClipBounds.Bottom);
var width = viewport.Extent.Width;
var height = viewport.Extent.Height;
var usedLineOffset = lineOffset;
uint usedLineOffsetInt = (uint)usedLineOffset;
IEnumerable <SKPaint> usedPaints = paints;
if (viewport.Resolution > 0.25)
{
usedLineOffset *= 10; // hide 10m layer
usedLineOffsetInt *= 10; // hide 10m layer
usedPaints = paintsL2;
}
if (viewport.Resolution > 3)
{
usedLineOffset *= 10; // hide 100m layer
usedLineOffsetInt *= 10; // hide 100m layer
usedPaints = paintsL3;
}
int lineCount100M = (int)(100 / usedLineOffset);
//How many lines are 1000m
int lineCount1000M = (int)(1000 / usedLineOffset);
if (lineCount100M == 0)
{
lineCount100M = 9000; //will never be reached, if we only render 1k's
}
double screenWidthPerLine = canvas.LocalClipBounds.Width / (width / usedLineOffset);
double screenHeightPerLine = canvas.LocalClipBounds.Height / (height / usedLineOffset);
//World coordinates of first lineOffset line
var first100mW = (TL.X + (usedLineOffset - TL.X % usedLineOffset));
var first100mH = (TL.Y + (usedLineOffset - TL.Y % usedLineOffset));
//Screen offset of first lineOffset line
double offsetCW = ((first100mW - TL.X) / usedLineOffset) * screenWidthPerLine;
double offsetCH = screenHeightPerLine + ((TL.Y - first100mH) / usedLineOffset) * screenHeightPerLine;
//offset of next 1k
int KOffsetW = (int)((first100mW % 1000) / usedLineOffset);
if (KOffsetW < 0)
{
KOffsetW = 10 + KOffsetW;
}
int KOffsetH = (int)((first100mH % 1000) / usedLineOffset) - 1;
if (lineCount1000M > 1)
{
KOffsetH = lineCount1000M - KOffsetH;
}
for (double curX = offsetCW; curX < canvas.LocalClipBounds.Right; curX += screenWidthPerLine)
{
var worldPos = viewport.ScreenToWorld(curX, 0).X;
var Xgrid10KM = (uint)(worldPos / 10000) % 10;
var Xgrid1KM = (uint)(worldPos / 1000) % 10;
var Xgrid100m = (uint)(worldPos / 100) % 10;
//var Xgrid10m = (uint)(worldPos / 10) % 10;
string gridPosString;
if (usedLineOffsetInt == 1000)
{
gridPosString = $"{Xgrid10KM}{Xgrid1KM}";
}
else if (usedLineOffsetInt == 100)
{
gridPosString = $"{Xgrid10KM}{Xgrid1KM}{Xgrid100m}";
}
else
{
gridPosString = $"{Xgrid10KM}{Xgrid1KM}{Xgrid100m}{(uint)(worldPos / 10) % 10}";
}
SKPaint paint;
if (KOffsetW >= 1000 && KOffsetW % 1000 == 0)
{
paint = usedPaints.ElementAt(0);
}
if (KOffsetW >= 100 && KOffsetW % 100 == 0)
{
paint = usedPaints.ElementAt(2);
}
else if (KOffsetW >= 10 && KOffsetW % 10 == 0)
{
paint = usedPaints.ElementAt(1);
}
else
{
paint = usedPaints.ElementAt(0);
}
if (KOffsetW == lineCount1000M)
{
KOffsetW = 0;
}
canvas.DrawLine((float)curX, 0, (float)curX, canvas.LocalClipBounds.Height, paint);
using (var gtext = SKTextBlob.Create(gridPosString, markerFont))
canvas.DrawText(gtext, (float)(curX + screenWidthPerLine / 2) - gtext.Bounds.MidX,
20 + gtext.Bounds.MidY,
paint100m);
KOffsetW++;
}
for (double curH = offsetCH; curH < canvas.LocalClipBounds.Bottom; curH += screenHeightPerLine)
{
var worldPos = viewport.ScreenToWorld(0, curH).Y;
var Xgrid10KM = (uint)(worldPos / 10000) % 10;
var Xgrid1KM = (uint)(worldPos / 1000) % 10;
var Xgrid100m = (uint)(worldPos / 100) % 10;
//var Xgrid10m = (uint)(worldPos / 10) % 10;
string gridPosString;
if (usedLineOffsetInt == 1000)
{
gridPosString = $"{Xgrid10KM}{Xgrid1KM}";
}
else if (usedLineOffsetInt == 100)
{
gridPosString = $"{Xgrid10KM}{Xgrid1KM}{Xgrid100m}";
}
else
{
gridPosString = $"{Xgrid10KM}{Xgrid1KM}{Xgrid100m}{(uint)(worldPos / 10) % 10}";
}
SKPaint paint;
if (KOffsetH >= 100 && KOffsetH % 100 == 0)
{
paint = usedPaints.ElementAt(2);
}
else if (KOffsetH >= 10 && KOffsetH % 10 == 0)
{
paint = usedPaints.ElementAt(1);
}
else
{
paint = usedPaints.ElementAt(0);
}
if (KOffsetH == lineCount1000M)
{
KOffsetH = 0;
}
canvas.DrawLine(0, (float)curH, canvas.LocalClipBounds.Width, (float)curH, paint);
using (var gtext = SKTextBlob.Create(gridPosString, markerFont))
canvas.DrawText(gtext, 0,
(float)(curH + screenWidthPerLine / 2) - gtext.Bounds.MidY,
paint100m);
KOffsetH++;
}
}