void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
float z = (float)zSlider.Value;
float surfaceScale = (float)surfaceScaleSlider.Value;
float lightConstant = (float)lightConstantSlider.Value;
using (SKPaint paint = new SKPaint())
{
paint.IsAntialias = true;
// Size text to 90% of canvas width
paint.TextSize = 100;
float textWidth = paint.MeasureText(TEXT);
paint.TextSize *= 0.9f * info.Width / textWidth;
// Find coordinates to center text
SKRect textBounds = new SKRect();
paint.MeasureText(TEXT, ref textBounds);
float xText = info.Rect.MidX - textBounds.MidX;
float yText = info.Rect.MidY - textBounds.MidY;
// Create distant light image filter
paint.ImageFilter = SKImageFilter.CreateDistantLitDiffuse(
new SKPoint3(2, 3, z),
SKColors.White,
surfaceScale,
lightConstant);
canvas.DrawText(TEXT, xText, yText, paint);
}
}
