public SkiaGraphicsView(IDrawable?drawable = null)
{
_canvas = new SkiaCanvas();
_scalingCanvas = new ScalingCanvas(_canvas);
Drawable = drawable;
PaintSurface += OnPaintSurface;
}
private void skglControl1_PaintSurface(object sender, SkiaSharp.Views.Desktop.SKPaintGLSurfaceEventArgs e)
{
double angleFraction = trackbarAngle.Value / (double)trackbarAngle.Maximum;
double angleRadians = 2 * Math.PI * angleFraction;
float angleDegrees = (float)(angleRadians * 180 / Math.PI);
float fontSize = 96;
string fontName = "Impact";
ICanvas canvas = new SkiaCanvas()
{
Canvas = e.Surface.Canvas
};
canvas.FillColor = Colors.Navy;
canvas.FillRectangle(0, 0, skglControl1.Width, skglControl1.Height);
Microsoft.Maui.Graphics.SizeF stringSize = GraphicsPlatform.CurrentService.GetStringSize(tbText.Text, fontName, fontSize);
float rectWidth = stringSize.Width;
float rectHeight = stringSize.Height;
Microsoft.Maui.Graphics.PointF[] rectCorners =
{
new(0, 0),
new(rectWidth, 0),
new(rectWidth, rectHeight),
new(0, rectHeight),
};
async void showPbf(string path, string stylePath, double zoom, double size = 512, double scale = 1)
{
var watch = System.Diagnostics.Stopwatch.StartNew();
// load style and font
var style = new VectorTileRenderer.Style(stylePath);
style.FontFallbackDirectory = mainDir + @"styles/fonts/";
// set pbf as tile provider
var provider = new VectorTileRenderer.Sources.PbfTileSource(path);
style.SetSourceProvider(0, provider);
// render it on a skia canvas
var canvas = new SkiaCanvas();
var bitmapR = await Renderer.Render(style, canvas, 0, 0, zoom, size, size, scale);
demoImage.Source = bitmapR;
watch.Stop();
var elapsedMs = watch.ElapsedMilliseconds;
Console.WriteLine(elapsedMs + "ms time");
}
public override PureImage GetTileImage(GPoint pos, int zoom)
{
var newY = (int)Math.Pow(2, zoom) - pos.Y - 1;
var canvas = new SkiaCanvas();
System.Windows.Media.Imaging.BitmapSource bitmapSource;
try
{
bitmapSource = Renderer.RenderCached(cachePath, style, canvas, (int)pos.X, (int)newY, zoom, 256, 256, 1).Result;
} catch (Exception)
{
bitmapSource = null;
}
if (bitmapSource == null)
{
bitmapSource = System.Windows.Media.Imaging.BitmapImage.Create(
2,
2,
96,
96,
System.Windows.Media.PixelFormats.Indexed1,
new System.Windows.Media.Imaging.BitmapPalette(new List <System.Windows.Media.Color> {
System.Windows.Media.Colors.Transparent
}),
new byte[] { 0, 0, 0, 0 },
1);
}
return(GetTileImageFromArray(GetBytesFromBitmapSource(bitmapSource)));
}
async void zurichMbTilesHybridStyle()
{
var watch = System.Diagnostics.Stopwatch.StartNew();
// load style and font
var style = new VectorTileRenderer.Style(mainDir + @"styles/hybrid-style.json");
style.FontFallbackDirectory = mainDir + @"styles/fonts/";
// set pbf as tile provider
var vectorProvider = new VectorTileRenderer.Sources.PbfTileSource(mainDir + @"tiles/zurich.pbf.gz");
style.SetSourceProvider(0, vectorProvider);
// load raster source
var rasterProvider = new VectorTileRenderer.Sources.RasterTileSource(mainDir + @"tiles/zurich.jpg");
style.SetSourceProvider("satellite", rasterProvider);
// render it on a skia canvas
var canvas = new SkiaCanvas();
var bitmapR = await Renderer.Render(style, canvas, 0, 0, 14, 256, 256, 1);
demoImage.Source = bitmapR;
watch.Stop();
var elapsedMs = watch.ElapsedMilliseconds;
Console.WriteLine(elapsedMs + "ms time");
}
private void SKElement_PaintSurface(object sender, SkiaSharp.Views.Desktop.SKPaintSurfaceEventArgs e)
{
ICanvas canvas = new SkiaCanvas()
{
Canvas = e.Surface.Canvas
};
//canvas.FillColor = Colors.Transparent;
//canvas.FillColor = Colors.White.WithAlpha(0.9f);
//canvas.FillRectangle(0, 0, (float)DrawSurface.ActualWidth, (float)DrawSurface.ActualHeight);
//canvas.StrokeColor = Colors.Red.WithAlpha(.5f);
canvas.StrokeColor = Colors.Red;
canvas.StrokeSize = 2;
var path = new PathF();
if (_points.Count > 0)
{
path.MoveTo(_points[0].X, _points[0].Y);
for (int i = 1; i < _points.Count; i++)
{
path.LineTo(_points[i].X, _points[i].Y);
}
//path.Close();
canvas.DrawPath(path);
}
}
public SkiaGraphicsView(Context context, IDrawable drawable = null) : base(context)
{
_scale = Resources.DisplayMetrics.Density;
_canvas = new SkiaCanvas();
_scalingCanvas = new ScalingCanvas(_canvas);
Drawable = drawable;
}
public SkiaGraphicsView(EvasObject parent, IDrawable drawable = null) : base(parent)
{
_canvas = new SkiaCanvas();
_scalingCanvas = new ScalingCanvas(_canvas);
Drawable = drawable;
PaintSurface += OnPaintSurface;
IgnorePixelScaling = true;
}
private void keyPicker_SelectedIndexChanged(object sender, EventArgs e)
{
if (keyPicker.SelectedIndex > -1)
{
this.scaleDiagramRenderer.GuitarModel.SetKey(keyPicker.SelectedItem.ToString());
SkiaCanvas.InvalidateSurface();
SetPageTitle();
}
}
private void skglControl1_PaintSurface(object sender, SkiaSharp.Views.Desktop.SKPaintGLSurfaceEventArgs e)
{
ICanvas canvas = new SkiaCanvas()
{
Canvas = e.Surface.Canvas
};
ActiveModel.Draw(canvas, skglControl1.Width, skglControl1.Height);
}
private void OnPaintSurface(SKCanvas skCanvas, int width, int height)
{
var skiaCanvas = new SkiaCanvas(skCanvas);
foreach (Shape shape in SampleShapes())
{
skiaCanvas.DrawShape(shape);
}
}
private void ScalePicker_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (scalePicker.SelectedIndex > -1)
{
var scale = (Webprofusion.Scalex.Music.ScaleItem)scalePicker.SelectedItem;
_guitarModel.SetScale(scale.ID);
SkiaCanvas.Invalidate();
//SetPageTitle();
}
}
private void tuningPicker_SelectedIndexChanged(object sender, EventArgs e)
{
if (tuningPicker.SelectedIndex > -1)
{
var tuning = (Webprofusion.Scalex.Guitar.GuitarTuning)tuningPicker.SelectedItem;
this.scaleDiagramRenderer.GuitarModel.SetTuning(tuning.ID);
SkiaCanvas.InvalidateSurface();
SetPageTitle();
}
}
private void scalePicker_SelectedIndexChanged(object sender, EventArgs e)
{
if (scalePicker.SelectedIndex > -1)
{
var scale = (Webprofusion.Scalex.Music.ScaleItem)scalePicker.SelectedItem;
this.scaleDiagramRenderer.GuitarModel.SetScale(scale.ID);
SkiaCanvas.InvalidateSurface();
SetPageTitle();
}
}
private void TuningPicker_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (tuningPicker.SelectedIndex > -1)
{
var tuning = (Webprofusion.Scalex.Guitar.GuitarTuning)tuningPicker.SelectedItem;
_guitarModel.SetTuning(tuning.ID);
SkiaCanvas.Invalidate();
// SetPageTitle();
}
}
private void typePicker_SelectedIndexChanged(object sender, EventArgs e)
{
if (typePicker.SelectedIndex > -1)
{
var chordType = (Webprofusion.Scalex.Music.ChordDefinition)typePicker.SelectedItem;
chordDiagramRenderer.CurrentChordDiagrams = chordDiagramRenderer.GuitarModel.GetChordDiagramsByGroup(chordType.ShortName);
SkiaCanvas.InvalidateSurface();
SetPageTitle();
}
}
private void skglControl1_PaintSurface(object sender, SkiaSharp.Views.Desktop.SKPaintGLSurfaceEventArgs e)
{
float width = skglControl1.Width;
float height = skglControl1.Height;
ICanvas canvas = new SkiaCanvas()
{
Canvas = e.Surface.Canvas
};
canvas.FillColor = Color.FromArgb("#003366");
canvas.FillRectangle(0, 0, width, height);
canvas.FillColor = Colors.LightGreen;
canvas.FillRectangle(0, 0, width * LevelFraction, height);
}
async void showMbTiles(string path, string stylePath, int minX, int minY, int maxX, int maxY, int zoom, double size = 512, double scale = 1)
{
var watch = System.Diagnostics.Stopwatch.StartNew();
// load style and font
var style = new VectorTileRenderer.Style(stylePath);
style.FontDirectory = mainDir + @"styles/fonts/";
// set pbf as tile provider
var provider = new VectorTileRenderer.Sources.MbTilesSource(path);
style.SetSourceProvider(0, provider);
BitmapSource[,] bitmapSources = new BitmapSource[maxX - minX + 1, maxY - minY + 1];
// loop through tiles and render them
Parallel.For(minX, maxX + 1, (int x) =>
{
Parallel.For(minY, maxY + 1, async(int y) =>
{
var canvas = new SkiaCanvas();
var bitmapR = await Renderer.Render(style, canvas, x, y, zoom, size, size, scale);
if (bitmapR == null)
{
}
bitmapSources[x - minX, maxY - y] = bitmapR;
});
});
// merge the tiles and show it
var bitmap = mergeBitmaps(bitmapSources);
demoImage.Source = bitmap;
scrollViewer.Background = new SolidColorBrush(style.GetBackgroundColor(zoom));
watch.Stop();
var elapsedMs = watch.ElapsedMilliseconds;
Console.WriteLine(elapsedMs + "ms time");
}
public byte[] GetTile(TileInfo tileInfo)
{
//var newY = (int)Math.Pow(2, zoom) - pos.Y - 1;
var canvas = new SkiaCanvas();
System.Windows.Media.Imaging.BitmapSource bitmapSource;
try
{
bitmapSource = Renderer.RenderCached(cachePath, style, canvas, (int)tileInfo.Index.Col, (int)tileInfo.Index.Row, Convert.ToInt32(tileInfo.Index.Level), 256, 256, 1).Result;
}
catch
{
return(null);
}
return(GetBytesFromBitmapSource(bitmapSource));
}
private void PositionElements(double yPos)
{
// calculate x pos
ProfileLogo.TranslationX = Math.Min(Math.Max(ProfileExpandedX - yPos * XStep, 10), ProfileExpandedX);
ProfileLogo.TranslationY = Math.Max(ProfileExpandedY - yPos * YStep, 0);
ProfileLogo.Scale = Math.Min(Math.Max(2 - yPos * ScaleStep, 1), 2);
// calculate header pos based on yPos
currentHeaderHeight = (float)Math.Max(minHeaderHeight, SkiaCanvas.Height - yPos);
SkiaCanvas.InvalidateSurface();
// change header curve
//float calccurveOffset = (float)Math.Max(curveMax - yPos, curveMin);
//if (calccurveOffset > 250)
// calccurveOffset = 250;
//if (calccurveOffset != curveOffset)
//{
// curveOffset = calccurveOffset;
// SkiaCanvas.InvalidateSurface();
//}
}
private void SKElement_PaintSurface(object sender, SkiaSharp.Views.Desktop.SKPaintSurfaceEventArgs e)
{
ICanvas canvas = new SkiaCanvas()
{
Canvas = e.Surface.Canvas
};
canvas.StrokeColor = Colors.Red;
canvas.StrokeSize = 2;
//draw many points
var path = new PathF();
if (_points.Count > 0)
{
path.MoveTo(_points[0].X, _points[0].Y);
for (int i = 1; i < _points.Count; i++)
{
path.LineTo(_points[i].X, _points[i].Y);
}
canvas.DrawPath(path);
}
}
public SkiaGraphicsView(IDrawable drawable = null)
{
_canvas = new SkiaCanvas();
_scalingCanvas = new ScalingCanvas(_canvas);
Drawable = drawable;
}
void Handle_ValueChanged(object sender, Xamarin.Forms.ValueChangedEventArgs e)
{
SkiaCanvas.InvalidateSurface();
}
void MySlider_ValueChanged(object sender, ValueChangedEventArgs e)
{
SkiaCanvas.InvalidateSurface();
}