protected override void OnDrawSample(SKCanvas canvas, int width, int height)
{
canvas.Clear(SKColors.White);
var step = height / 4;
using (var paint = new SKPaint())
using (var effect = SKPathEffect.CreateDash(new[] { 15f, 5f }, 0))
{
paint.IsStroke = true;
paint.StrokeWidth = 4;
paint.PathEffect = effect;
canvas.DrawLine(10, step, width - 10 - 10, step, paint);
}
using (var paint = new SKPaint())
using (var effect = SKPathEffect.CreateDiscrete(10, 10))
{
paint.IsStroke = true;
paint.StrokeWidth = 4;
paint.PathEffect = effect;
canvas.DrawLine(10, step * 2, width - 10 - 10, step * 2, paint);
}
using (var paint = new SKPaint())
using (var dashEffect = SKPathEffect.CreateDash(new[] { 15f, 5f }, 0))
using (var discreteEffect = SKPathEffect.CreateDiscrete(10, 10))
using (var effect = SKPathEffect.CreateCompose(dashEffect, discreteEffect))
{
paint.IsStroke = true;
paint.StrokeWidth = 4;
paint.PathEffect = effect;
canvas.DrawLine(10, step * 3, width - 10 - 10, step * 3, paint);
}
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
string text = "FUZZY";
using (SKPaint textPaint = new SKPaint())
{
textPaint.Color = SKColors.Purple;
textPaint.PathEffect = SKPathEffect.CreateDiscrete(3f, 10f);
// Adjust TextSize property so text is 95% of screen width
float textWidth = textPaint.MeasureText(text);
textPaint.TextSize *= 0.95f * info.Width / textWidth;
// Find the text bounds
SKRect textBounds;
textPaint.MeasureText(text, ref textBounds);
// Calculate offsets to center the text on the screen
float xText = info.Width / 2 - textBounds.MidX;
float yText = info.Height / 2 - textBounds.MidY;
canvas.DrawText(text, xText, yText, textPaint);
}
}
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear();
float segLength = (float)segLengthSlider.Value;
float deviation = (float)deviationSlider.Value;
using (SKPaint paint = new SKPaint())
{
paint.Style = SKPaintStyle.Stroke;
paint.StrokeWidth = 5;
paint.Color = SKColors.Blue;
using (SKPathEffect pathEffect = SKPathEffect.CreateDiscrete(segLength, deviation))
{
paint.PathEffect = pathEffect;
SKRect rect = new SKRect(100, 100, info.Width - 100, info.Height - 100);
canvas.DrawRect(rect, paint);
}
}
}
protected override void OnPaintSurface(SKPaintGLSurfaceEventArgs e)
{
base.OnPaintSurface(e);
var canvas = e.Surface.Canvas;
var size = Math.Min(e.RenderTarget.Width, e.RenderTarget.Height) - ProgressThickness;
using (var paint = new SKPaint())
using (var path = new SKPath()) {
var left = (e.RenderTarget.Width - size) / 2f;
var top = (e.RenderTarget.Height - size) / 2f;
var right = left + size;
var bottom = top + size;
path.AddArc(new SKRect(left, top, right, bottom), StartingDegrees, EndingDegrees);
paint.IsAntialias = true;
paint.StrokeCap = SKStrokeCap.Round;
paint.Style = SKPaintStyle.Stroke;
paint.Color = ProgressColor.ToSKColor();
paint.StrokeWidth = ProgressThickness;
paint.PathEffect = SKPathEffect.CreateDiscrete(12f, 4f, (uint)Guid.NewGuid().GetHashCode());
canvas.Clear(Color.White.ToSKColor());
canvas.DrawPath(path, paint);
}
}
void OnPaintShadedStar(object sender, SKPaintSurfaceEventArgs e)
{
int width = e.Info.Width;
int height = e.Info.Height;
SKCanvas canvas = e.Surface.Canvas;
using (SKPaint paint = new SKPaint())
{
canvas.Clear(Color.White.ToSKColor()); //paint it black
paint.Color = Color.Green.ToSKColor();
paint.PathEffect = SKPathEffect.CreateDiscrete(5.0f, 2.0f);
paint.Shader = SKShader.CreateLinearGradient(new SKPoint(0, 0),
new SKPoint(256, 256),
new SKColor[] { Color.Lime.ToSKColor(), Color.Orange.ToSKColor() },
null, SKShaderTileMode.Clamp);
paint.IsAntialias = true;
canvas.DrawPath(GetStarPath(width / 2 - 128), paint);
}
}
protected override void OnPaintSurface(SKPaintSurfaceEventArgs e)
{
base.OnPaintSurface(e);
var canvas = e.Surface.Canvas;
var size = Math.Min(e.Info.Width, e.Info.Height) - ProgressThickness;
canvas.Clear();
using var paint = new SKPaint();
paint.Style = SKPaintStyle.Stroke;
paint.StrokeCap = SKStrokeCap.Round;
paint.StrokeWidth = ProgressThickness;
paint.IsAntialias = true;
if (Jagged)
{
paint.PathEffect = SKPathEffect.CreateDiscrete(12f, 4f, (uint)Guid.NewGuid().GetHashCode());
}
using var path = new SKPath();
var left = (e.Info.Width - size) / 2f;
var top = (e.Info.Height - size) / 2f;
var right = left + size;
var bottom = top + size;
path.AddArc(new SKRect(left, top, right, bottom), 0, 360);
paint.Color = ProgressColor.AddLuminosity(-.3d).ToSKColor();
canvas.DrawPath(path, paint);
path.Reset();
path.AddArc(new SKRect(left, top, right, bottom), StartingDegrees, EndingDegrees);
paint.Color = SKColors.Black;
paint.ImageFilter = SKImageFilter.CreateBlur(3f, 3f);
paint.BlendMode = SKBlendMode.SrcATop;
canvas.DrawPath(path, paint);
paint.ImageFilter = null;
paint.BlendMode = SKBlendMode.SrcOver;
paint.Color = ProgressColor.ToSKColor();
canvas.DrawPath(path, paint);
}
public void DrawSketch(SKCanvas canvas)
{
// Build OvalStyleFill Blur
var OvalStyleFillBlur = SKImageFilter.CreateBlur(9.522291f, 4.249391f, null, null);
// Fill color for Oval Style
var OvalStyleFillColor = new SKColor(255, 0, 128, 255);
// New Oval Style fill paint
var OvalStyleFillPaint = new SKPaint()
{
Style = SKPaintStyle.Fill,
Color = OvalStyleFillColor,
BlendMode = SKBlendMode.SrcOver,
IsAntialias = true,
PathEffect = SKPathEffect.CreateDiscrete(11.70298f, 8.239141f),
ImageFilter = OvalStyleFillBlur
};
// Frame color for Oval Style
var OvalStyleFrameColor = new SKColor(204, 102, 255, 255);
// New Oval Style frame paint
var OvalStyleFramePaint = new SKPaint()
{
Style = SKPaintStyle.Stroke,
Color = OvalStyleFrameColor,
BlendMode = SKBlendMode.SrcOver,
IsAntialias = true,
StrokeWidth = 1f,
StrokeMiter = 4f,
StrokeJoin = SKStrokeJoin.Miter,
StrokeCap = SKStrokeCap.Butt
};
// Draw Oval shape
canvas.DrawOval(new SKRect(51.79688f, 47.54688f, 235.5156f, 216.3242f), OvalStyleFillPaint);
canvas.DrawOval(new SKRect(51.79688f, 47.54688f, 235.5156f, 216.3242f), OvalStyleFramePaint);
}