public void DrawShapedTextExtensionMethodDraws()
{
using (var bitmap = new SKBitmap(new SKImageInfo(512, 512)))
using (var canvas = new SKCanvas(bitmap))
using (var tf = SKTypeface.FromFile(Path.Combine(PathToFonts, "content-font.ttf")))
using (var shaper = new SKShaper(tf))
using (var paint = new SKPaint {
IsAntialias = true, TextSize = 64, Typeface = tf
})
{
canvas.Clear(SKColors.White);
canvas.DrawShapedText(shaper, "متن", 100, 200, paint);
canvas.Flush();
Assert.Equal(SKColors.Black, bitmap.GetPixel(110, 210));
Assert.Equal(SKColors.Black, bitmap.GetPixel(127, 196));
Assert.Equal(SKColors.Black, bitmap.GetPixel(142, 197));
Assert.Equal(SKColors.Black, bitmap.GetPixel(155, 195));
Assert.Equal(SKColors.Black, bitmap.GetPixel(131, 181));
Assert.Equal(SKColors.White, bitmap.GetPixel(155, 190));
Assert.Equal(SKColors.White, bitmap.GetPixel(110, 200));
}
}
public void ShapeTest()
{
using var bmp = new Bitmap(600, 400);
using var canvas = new SKCanvas(bmp.skBitmap);
using var typeface = SKFontManager.Default.MatchCharacter('中');
using var paint = new SKPaint();
paint.IsAntialias = true;
paint.TextEncoding = SKTextEncoding.Utf16;
paint.TextSize = 30;
paint.Color = new SKColor(255, 0, 0, 255);
paint.Style = SKPaintStyle.Fill;
paint.Typeface = typeface;
var src = "Hello Future! 你好，未来！";
canvas.DrawText(src, 0, 100, paint);
using var shaper = new SKShaper(typeface);
paint.TextAlign = SKTextAlign.Right;
//paint.TextEncoding = SKTextEncoding.GlyphId; //Not implemented
canvas.DrawShapedText(shaper, src, 0, 200, paint);
using var fs = File.OpenWrite("A_document.jpg");
bmp.Save(fs, ImageFormat.Jpeg);
}
public static void DrawShapedText(this SKCanvas canvas, string text, float x, float y, SKPaint paint)
{
if (string.IsNullOrEmpty(text))
{
return;
}
using var shaper = new SKShaper(paint.GetFont().Typeface);
canvas.DrawShapedText(shaper, text, x, y, paint);
}
protected void DrawLabels(SKCanvas canvas, SKPoint[] points, SKSize itemSize, int height, float footerHeight)
{
for (int i = 0; i < this.Entries.Count(); i++)
{
var entry = this.Entries.ElementAt(i);
var point = points[i];
if (!string.IsNullOrEmpty(entry.Label))
{
using (var paint = new SKPaint())
{
paint.TextSize = this.LabelTextSize;
paint.IsAntialias = true;
paint.Color = entry.TextColor;
paint.IsStroke = false;
var bounds = new SKRect();
var text = entry.Label;
paint.MeasureText(text, ref bounds);
if (bounds.Width > itemSize.Width)
{
text = text.Substring(0, Math.Min(3, text.Length));
paint.MeasureText(text, ref bounds);
}
if (bounds.Width > itemSize.Width)
{
text = text.Substring(0, Math.Min(1, text.Length));
paint.MeasureText(text, ref bounds);
}
//canvas.DrawText("asdf", point.X - (bounds.Width / 2), height - this.Margin + (this.LabelTextSize / 2), paint);
using (var tf = SKFontManager.Default.MatchCharacter('م'))
using (var shaper = new SKShaper(tf))
using (var paint1 = new SKPaint {
TextSize = 30, Typeface = tf
})
{
//canvas.Clear(SKColors.White);
//canvas.DrawShapedText(shaper, "سلام", 100, 200, paint1);
paint.Typeface = tf;
var balanceValue = 35;
canvas.DrawShapedText(shaper, text, point.X - (bounds.Width / 2) - balanceValue, height - this.Margin + (this.LabelTextSize / 2) - balanceValue, paint);
}
}
}
}
}
public void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args)
{
try
{
SKImageInfo info = args.Info;
SKSurface surface = args.Surface;
SKCanvas canvas = surface.Canvas;
Assembly assembly = GetType().GetTypeInfo().Assembly;
if (_saveBitmap == null)
{
_saveBitmap = new SKBitmap(info.Width, info.Height);
}
SKBitmap bitmap = new SKBitmap(Math.Max(_saveBitmap.Width, info.Width),
Math.Max(_saveBitmap.Height, info.Height));
float x = info.Width / 3;
float y = (float)(info.Height / 1.5);
using (SKCanvas c = new SKCanvas(bitmap))
{
foreach (SKPath p in _completedPaths)
{
c.DrawPath(p, paint);
}
foreach (SKPath p in _inProgressPaths.Values)
{
c.DrawPath(p, paint);
}
}
canvas.Clear();
canvas.DrawBitmap(bitmap, 0, 0);
var emoji = _vm.Image;
int exEmoji = 0x1f600;
paint.Typeface = SKFontManager.CreateDefault().MatchCharacter(exEmoji);
paint.TextSize = 210.0f;
var tf = SKFontManager.CreateDefault().MatchCharacter(exEmoji);
var shaper = new SKShaper(tf);
canvas.DrawShapedText(shaper, emoji, x, y, paint);
}
catch { }
}
protected override void OnDrawSample(SKCanvas canvas, int width, int height)
{
canvas.DrawColor(SKColors.White);
using var tf = SKFontManager.Default.MatchCharacter('م') ?? SKTypeface.FromStream(SampleMedia.Fonts.EmbeddedFont);
using var paint = new SKPaint { IsAntialias = true, TextSize = 64 };
using var arabicPaint = new SKPaint { IsAntialias = true, TextSize = 64, Typeface = tf };
// unshaped
canvas.DrawText("Unshaped:", 100, 100, paint);
canvas.DrawText("مرحبا بالعالم", 100, 180, arabicPaint);
// shaped
using var shaper = new SKShaper(tf);
canvas.DrawText("Shaped:", 100, 300, paint);
canvas.DrawShapedText(shaper, "مرحبا بالعالم", 100, 380, arabicPaint);
}
private new void DrawDisplayName(SKCanvas c)
{
if (string.IsNullOrEmpty(DisplayName))
{
return;
}
_headerPaint.Shader = null;
_headerPaint.Color = SKColors.White;
while (_headerPaint.MeasureText(DisplayName) > Width)
{
_headerPaint.TextSize -= 1;
}
var shaper = new CustomSKShaper(_headerPaint.Typeface);
var shapedText = shaper.Shape(DisplayName, _headerPaint);
c.DrawShapedText(shaper, DisplayName, (Width - shapedText.Points[^ 1].X) / 2, _headerHeight / 2 + _headerPaint.TextSize / 2 - 10, _headerPaint);
public void DrawHeader(SKCanvas c)
{
c.DrawRect(new SKRect(0, 0, Width, Height), _headerPaint);
_headerPaint.Shader = SKShader.CreateRadialGradient(new SKPoint(Width / 2, _headerHeight / 2), Width / 5 * 4,
new[] { SKColors.SkyBlue.WithAlpha(50), SKColors.Blue.WithAlpha(50) }, SKShaderTileMode.Clamp);
c.DrawRect(new SKRect(0, 0, Width, Height), _headerPaint);
_headerPaint.Shader = SKShader.CreateLinearGradient(new SKPoint(Width / 2, _headerHeight), new SKPoint(Width / 2, 75),
new[] { SKColors.Black.WithAlpha(25), SKColors.Blue.WithAlpha(0) }, SKShaderTileMode.Clamp);
c.DrawRect(new SKRect(0, 75, Width, _headerHeight), _headerPaint);
_headerPaint.Shader = null;
_headerPaint.Color = SKColors.White;
while (_headerPaint.MeasureText(DisplayName) > Width)
{
_headerPaint.TextSize -= 1;
}
var shaper = new CustomSKShaper(_headerPaint.Typeface);
var shapedText = shaper.Shape(DisplayName, _headerPaint);
c.DrawShapedText(shaper, DisplayName, (Width - shapedText.Points[^ 1].X) / 2, _headerHeight / 2 + _headerPaint.TextSize / 2 - 10, _headerPaint);
public static void DrawShapedText(this SKCanvas canvas, string text, SKPoint p, SKPaint paint) => canvas.DrawShapedText(text, p.X, p.Y, paint);
public static void DrawCaptionLabels(this SKCanvas canvas, string label, SKColor labelColor, string value, SKColor valueColor, float textSize, SKPoint point, SKTextAlign horizontalAlignment)
{
var hasLabel = !string.IsNullOrEmpty(label);
var hasValueLabel = !string.IsNullOrEmpty(value);
if (hasLabel || hasValueLabel)
{
var hasOffset = hasLabel && hasValueLabel;
var captionMargin = textSize * 0.60f;
var space = hasOffset ? captionMargin : 0;
if (hasLabel)
{
using (var paint = new SKPaint()
{
TextSize = textSize,
IsAntialias = true,
Color = labelColor,
IsStroke = false,
//TextAlign = horizontalAlignment,
})
{
var bounds = new SKRect();
var text = label;
paint.MeasureText(text, ref bounds);
var y = point.Y - ((bounds.Top + bounds.Bottom) / 2) - space;
//canvas.DrawText(text, point.X, y, paint);
using (var tf = SKFontManager.Default.MatchCharacter('م'))
using (var shaper = new SKShaper(tf))
using (var paint1 = new SKPaint {
TextSize = 30, Typeface = tf
})
{
//canvas.Clear(SKColors.White);
//canvas.DrawShapedText(shaper, "سلام", 100, 200, paint1);
paint.Typeface = tf;
var balaceValue = 0;
if (horizontalAlignment == SKTextAlign.Right)
{
if (text.Length <= 5)
{
balaceValue = 60;
}
else
{
var factor = (System.Math.Abs(text.Length - 5));
balaceValue = factor * 10 + 90;
}
}
canvas.DrawShapedText(shaper, text, point.X - balaceValue, y, paint);
}
}
}
if (hasValueLabel)
{
using (var paint = new SKPaint()
{
TextSize = textSize,
IsAntialias = true,
FakeBoldText = true,
Color = valueColor,
IsStroke = false,
TextAlign = horizontalAlignment,
})
{
var bounds = new SKRect();
var text = value;
paint.MeasureText(text, ref bounds);
var y = point.Y - ((bounds.Top + bounds.Bottom) / 2) + space;
canvas.DrawText(text, point.X, y, paint);
}
}
}
}
public SKData DrawHistogram(string referenceName, int zoom, int chunk)
{
var refer = _service._references.FirstOrDefault(r => r.Name == referenceName);
if (chunk == 0 && zoom == 10)
{
LoadReference(referenceName);
}
using var surface = SKSurface.Create(new SKImageInfo(refer.Length * zoom, 220));
using SKCanvas canvas = surface.Canvas;
canvas.Clear();
using SKPaint paint = new SKPaint
{
Style = SKPaintStyle.StrokeAndFill,
Color = SKColors.Blue,
StrokeWidth = 1
};
using SKPaint linePaint = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = SKColors.Black,
StrokeWidth = 1
};
using SKPaint dashPaint = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = SKColors.Black,
StrokeWidth = 1,
PathEffect = SKPathEffect.CreateDash(new[] { 20f, 5f }, 0)
};
var histData = _service._histograms[refer.Name];
var scale = (float)(100 / histData.Average());
for (int i = 0; i < refer.Length; i++)
{
canvas.DrawRect(i * zoom + 5, 200 - (histData[i] * scale), zoom, histData[i] * scale, paint);
}
canvas.DrawLine(5, 0, 5, 200, linePaint);
canvas.DrawLine(5, 199, refer.Length * zoom, 199, linePaint);
var average = (int)(Math.Round(histData.Average()));
canvas.DrawLine(5, average * scale, refer.Length * zoom, average * scale, dashPaint);
using SKPaint textPaint = new SKPaint
{
Style = SKPaintStyle.StrokeAndFill,
Color = SKColors.Black,
StrokeWidth = 1,
TextSize = 20,
Typeface = SKTypeface.FromFamilyName("Courier New"),
SubpixelText = true
};
canvas.DrawText(average.ToString(), 6, average * scale - 2, textPaint);
var cnt = textPaint.MeasureText("ACGT");
if (zoom == 10)
{
textPaint.TextSize = textPaint.TextSize * 40 / cnt;
var shaper = new SKShaper(SKTypeface.FromFamilyName("Courier New"));
canvas.DrawShapedText(shaper, reference, 5, 215, textPaint);
}
var width = (chunk + 1) * WIDTH * zoom > refer.Length * zoom ? refer.Length * zoom % WIDTH : WIDTH;
SKPixmap pixmap = surface.Snapshot().Subset(SKRectI.Create(chunk * WIDTH, 0, width, canvas.DeviceClipBounds.Height)).PeekPixels();
var options = new SKWebpEncoderOptions(SKWebpEncoderCompression.Lossless, 100);
return(pixmap.Encode(options));
}
public static void DrawCaptionLabels(this SKCanvas canvas, string label, SKColor labelColor, bool labelIsUnicode, char unicodeLang, string value, SKColor valueColor, float textSize, SKPoint point, SKTextAlign horizontalAlignment, SKTypeface typeface, out SKRect totalBounds)
{
var hasLabel = !string.IsNullOrEmpty(label);
var hasValueLabel = !string.IsNullOrEmpty(value);
totalBounds = new SKRect();
if (hasLabel || hasValueLabel)
{
var hasOffset = hasLabel && hasValueLabel;
var captionMargin = textSize * 0.60f;
var space = hasOffset ? captionMargin : 0;
if (hasLabel)
{
using (var paint = new SKPaint
{
TextSize = textSize,
IsAntialias = true,
Color = labelColor,
IsStroke = false,
TextAlign = horizontalAlignment,
Typeface = typeface
})
{
var bounds = new SKRect();
var text = label;
paint.MeasureText(text, ref bounds);
var y = point.Y - ((bounds.Top + bounds.Bottom) / 2) - space;
if (labelIsUnicode)
{
using (var tf = SKFontManager.Default.MatchCharacter(unicodeLang))
using (var shaper = new SKShaper(tf))
{
canvas.DrawShapedText(shaper, text, 0, 0, paint);
}
}
else
{
canvas.DrawText(text, point.X, y, paint);
}
var labelBounds = GetAbsolutePositionRect(point.X, y, bounds, horizontalAlignment);
totalBounds = labelBounds.Standardized;
}
}
if (hasValueLabel)
{
using (var paint = new SKPaint()
{
TextSize = textSize,
IsAntialias = true,
FakeBoldText = true,
Color = valueColor,
IsStroke = false,
TextAlign = horizontalAlignment,
Typeface = typeface
})
{
var bounds = new SKRect();
var text = value;
paint.MeasureText(text, ref bounds);
var y = point.Y - ((bounds.Top + bounds.Bottom) / 2) + space;
canvas.DrawText(text, point.X, y, paint);
var valueBounds = GetAbsolutePositionRect(point.X, y, bounds, horizontalAlignment);
if (totalBounds.IsEmpty)
{
totalBounds = valueBounds;
}
else
{
totalBounds.Union(valueBounds);
}
}
}
}
}
