コード例 #1
0
        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());
            }
        }
コード例 #2
0
        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;
                }
            }
        }