public static Rect MeasureTextBounds(this SKCanvas canvas, string text, Color color, float fontSize = DefaultFontSize, double width = DefaultFontWidth, SKTextAlign textAlign = SKTextAlign.Left)
{
using (var paint = SKPaintHelper.CreateTextPaint(fontSize, width, color, textAlign))
{
var bounds = SKRect.Empty;
paint.MeasureText(text, ref bounds);
return(bounds.ToRect());
}
}
public static void DrawText(this SKCanvas canvas, string[] lines, Rect rect, Color color, float fontSize = DefaultFontSize,
double width = DefaultFontWidth, double?lineSpacing = null, SKTextAlign textAlign = SKTextAlign.Left, bool clip = true)
{
if (lines is null)
{
return;
}
using (var paint = SKPaintHelper.CreateTextPaint(fontSize, width, color, textAlign))
{
var finalLineSpacing = lineSpacing ?? paint.FontSpacing;
var finalCharSpacing = fontSize / 8f;
var begin = rect.GetTopLeft();
var currentPoint = begin;
for (var i = 0; i < lines.Length; i++)
{
var line = lines[i];
var lineHeight = 0f;
var lineBounds = SKRect.Empty;
paint.MeasureText(line, ref lineBounds);
if (clip && begin.Y + rect.Height < currentPoint.Y + lineBounds.Height)
{
break;
}
// To get the right spacing, duplicate the spaces
line = line.Replace(" ", " ");
for (var j = 0; j < line.Length; j++)
{
var charString = line[j].ToString();
var bounds = SKRect.Empty;
paint.MeasureText(charString, ref bounds);
if (clip && begin.X + rect.Width < currentPoint.X + bounds.Width)
{
break;
}
if (bounds.Height > lineHeight)
{
lineHeight = bounds.Height;
}
canvas.DrawText(charString, (float)currentPoint.X, (float)currentPoint.Y, paint);
currentPoint.X += bounds.Width;
if (charString == " ")
{
currentPoint.X += finalCharSpacing;
}
}
currentPoint.X = begin.X;
currentPoint.Y = currentPoint.Y + lineHeight + finalLineSpacing;
}
}
}
