static void TestDrawUnderline(string text, float fontSize, TextFormatFlags flags)
{
var font = new Font(Typeface, fontSize, FontStyle.Underline);
var fileName = CleanFileName($"underline-{text}-{fontSize}-{flags}.png");
foreach (char c in System.IO.Path.GetInvalidFileNameChars())
{
fileName = fileName.Replace(c, '_');
}
var size = TextRendererSk.MeasureText(text, font, 0, flags);
var BackColour = SKColors.Black;
using (SKBitmap bitmap = new SKBitmap((int)size.Width, (int)size.Height, SKColorType.Rgba8888, SKAlphaType.Unpremul))
using (var canvas = new SKCanvas(bitmap))
{
canvas.Clear(BackColour);
TextRendererSk.DrawText(canvas, text, font, SKRect.Create(0, -1, size.Width, size.Height), SKColors.White, flags);
using (Stream s = File.Open(fileName, FileMode.Create))
{
SKData d = SKImage.FromBitmap(bitmap).Encode(SKEncodedImageFormat.Png, 100);
d.SaveTo(s);
}
}
Console.WriteLine("Drawing Underline {0} (fontSize {1}, flags {2}), measured size: {3}", text, fontSize, flags, size);
}
static void TestDrawSelectionMultiline(string text, float fontSize, TextFormatFlags flags, TextPaintOptions options)
{
var font = new Font(Typeface, fontSize);
var fileName = CleanFileName($"DrawSelectionMultiline-start({options.SelectionStart})-end({options.SelectionEnd})-{text}-{fontSize}-{flags}.png");
var size = TextRendererSk.MeasureText(text, font, 0, flags);
var BackColour = SKColors.Black;
using (SKBitmap bitmap = new SKBitmap((int)size.Width, (int)size.Height, SKColorType.Rgba8888, SKAlphaType.Unpremul))
using (var canvas = new SKCanvas(bitmap))
{
canvas.Clear(BackColour);
TextRendererSk.DrawText(canvas, text, font, SKRect.Create(0, 0, size.Width, size.Height), SKColors.White, flags, options);
using (Stream s = File.Open(fileName, FileMode.Create))
{
SKData d = SKImage.FromBitmap(bitmap).Encode(SKEncodedImageFormat.Png, 100);
d.SaveTo(s);
}
}
Console.WriteLine("Drawing with selection and multiline {0} (fontSize {1}, flags {2}), measured size: {3}", text, fontSize, flags, size);
}
public void TestGetCursorFromPoint()
{
var font = new Font(Typeface, 20);
var flags = TextFormatFlags.Default;
var text = "Hello 你好 world!";
var size = TextRendererSk.MeasureText(text, font, 0, flags);
var point = new SKPoint(0, 0);
var cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(0, cursor);
point = new SKPoint(6, 10);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(0, cursor);
point = new SKPoint(12, 17);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(1, cursor);
point = new SKPoint(23, 17);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(2, cursor);
point = new SKPoint(81, 9);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(7, cursor);
point = new SKPoint(136, 14);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(11, cursor);
point = new SKPoint(141, 11);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(12, cursor);
point = new SKPoint(170, 16);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(15, cursor);
// Click on the right of last character
point = new SKPoint(178, 13);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(15, cursor);
point = new SKPoint(11, -1);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(1, cursor);
point = new SKPoint(181, 12);
cursor = TextRendererSk.GetCursorFromPoint(text, font, SKRect.Create(0, 0, size.Width, size.Height), flags, point);
Assert.AreEqual(15, cursor);
}
static void TestDrawCursorMultiline(string text, float fontSize, TextFormatFlags flags, SKSize size, int cursorPosition)
{
var font = new Font(Typeface, fontSize);
var fileName = CleanFileName($"DrawCursor-sized-cursor({cursorPosition})-{text}-{fontSize}-{flags}.png");
var BackColour = SKColors.Black;
using (SKBitmap bitmap = new SKBitmap((int)size.Width, (int)size.Height, SKColorType.Rgba8888, SKAlphaType.Unpremul))
using (var canvas = new SKCanvas(bitmap))
{
canvas.Clear(BackColour);
TextRendererSk.DrawText(canvas, text, font, SKRect.Create(0, 0, size.Width, size.Height), SKColors.White, flags, cursorPosition);
using (Stream s = File.Open(fileName, FileMode.Create))
{
SKData d = SKImage.FromBitmap(bitmap).Encode(SKEncodedImageFormat.Png, 100);
d.SaveTo(s);
}
}
Console.WriteLine("Drawing sized with cursor {0} (fontSize {1}, flags {2}), measured size: {3}", text, fontSize, flags, size);
}
