private void OnPaintSurface(object sender, SKPaintGLSurfaceEventArgs e)
{
game.Update();
var canvas = e.Surface.Canvas;
canvas.Clear(SKColors.Black);
using var save = new SKAutoCanvasRestore(canvas, true);
scale = Math.Min(
(float)e.BackendRenderTarget.Width / baseSize.Width,
(float)e.BackendRenderTarget.Height / baseSize.Height);
var screenRect = (SKRect)e.BackendRenderTarget.Rect;
var centeredRect = screenRect.AspectFit(baseSize);
offset = centeredRect.Location;
canvas.Translate(offset);
canvas.Scale(scale);
canvas.ClipRect(SKRect.Create(baseSize));
game.Draw(canvas);
}
public void Draw(SKCanvas canvas, float angle, float x, float y)
{
using var save = new SKAutoCanvasRestore(canvas, true);
var bird = birdAnimation.Frames[birdAnimation.CurrentFrame];
x -= Width / 2f;
y += BobOffset;
canvas.RotateDegrees(angle, x + Width / 2f, y + Height / 2f);
bird.Draw(canvas, x, y);
}
public void Draw(SKCanvas canvas, float angle, float x, float y)
{
using var save = new SKAutoCanvasRestore(canvas, true);
var bird = birdAnimation.Frames[birdAnimation.CurrentFrame];
var bounds = GetBounds(x, y);
canvas.Translate(bounds.Left, bounds.Top);
canvas.RotateDegrees(angle, Width / 2f, Height / 2f);
bird.Draw(canvas, 0, 0);
}
/// <inheritdoc/>
public void DrawText(
ScreenPoint p,
string text,
OxyColor fill,
string fontFamily = null,
double fontSize = 10,
double fontWeight = 400,
double rotation = 0,
HorizontalAlignment horizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment verticalAlignment = VerticalAlignment.Top,
OxySize?maxSize = null)
{
if (text == null || !fill.IsVisible())
{
return;
}
var paint = this.GetTextPaint(fontFamily, fontSize, fontWeight, out var shaper);
paint.Color = fill.ToSKColor();
var x = this.Convert(p.X);
var y = this.Convert(p.Y);
var lines = StringHelper.SplitLines(text);
var lineHeight = paint.GetFontMetrics(out var metrics);
var deltaY = verticalAlignment switch
{
VerticalAlignment.Top => - metrics.Ascent,
VerticalAlignment.Middle => - (metrics.Ascent + metrics.Descent + lineHeight * (lines.Length - 1)) / 2,
VerticalAlignment.Bottom => - metrics.Descent - lineHeight * (lines.Length - 1),
_ => throw new ArgumentOutOfRangeException(nameof(verticalAlignment))
};
using var _ = new SKAutoCanvasRestore(this.SkCanvas);
this.SkCanvas.Translate(x, y);
this.SkCanvas.RotateDegrees((float)rotation);
foreach (var line in lines)
{
if (this.UseTextShaping)
{
var width = this.MeasureText(line, shaper, paint);
var deltaX = horizontalAlignment switch
{
HorizontalAlignment.Left => 0,
HorizontalAlignment.Center => - width / 2,
HorizontalAlignment.Right => - width,
_ => throw new ArgumentOutOfRangeException(nameof(horizontalAlignment))
};
this.paint.TextAlign = SKTextAlign.Left;
this.SkCanvas.DrawShapedText(shaper, line, deltaX, deltaY, paint);
}
else
{
paint.TextAlign = horizontalAlignment switch
{
HorizontalAlignment.Left => SKTextAlign.Left,
HorizontalAlignment.Center => SKTextAlign.Center,
HorizontalAlignment.Right => SKTextAlign.Right,
_ => throw new ArgumentOutOfRangeException(nameof(horizontalAlignment))
};
this.SkCanvas.DrawText(line, 0, deltaY, paint);
}
deltaY += lineHeight;
}
}