public void BreakTextReturnsTheCorrectNumberOfBytes(SKTextEncoding encoding, string text, int extectedRead)
{
var paint = new SKPaint();
paint.TextEncoding = encoding;
// get bytes
var bytes = encoding == SKTextEncoding.GlyphId
? GetGlyphBytes(text)
: StringUtilities.GetEncodedText(text, encoding);
var read = paint.BreakText(bytes, 50.0f, out var measured);
Assert.Equal(extectedRead, read);
Assert.True(measured > 0);
byte[] GetGlyphBytes(string text)
{
var glyphs = paint.GetGlyphs(text);
var bytes = new byte[Buffer.ByteLength(glyphs)];
Buffer.BlockCopy(glyphs, 0, bytes, 0, bytes.Length);
return(bytes);
}
}
public bool PrepareLetterDefinitions(string text)
{
List <char> newChars = new List <char>();
FindNewCharacters(text, ref newChars);
if (newChars.Count == 0)
{
return(false);
}
var newCharString = new string(newChars.ToArray());
var glyphs = _TextPaint.GetGlyphs(newCharString);
var glyphWidths = _TextPaint.GetGlyphWidths(newCharString);
for (int i = 0; i < glyphs.Length; i++)
{
FontLetterDefinition tempDef = new FontLetterDefinition();
if (glyphs[i] == 0)
{
_LetterDefinitions[newCharString[i]] = tempDef;
}
else
{
tempDef.ValidDefinition = true;
tempDef.AdvanceX = glyphWidths[i];
_LetterDefinitions[newCharString[i]] = tempDef;
}
}
return(true);
}
public void UnicodeGlyphsReturnsTheCorrectNumberOfCharacters()
{
const string text = "🚀";
var emojiChar = StringUtilities.GetUnicodeCharacterCode(text, SKTextEncoding.Utf32);
var typeface = SKFontManager.Default.MatchCharacter(emojiChar);
Assert.NotNull(typeface);
var paint = new SKPaint();
paint.TextEncoding = SKTextEncoding.Utf32;
paint.Typeface = typeface;
Assert.Equal(1, paint.CountGlyphs(text));
Assert.Single(paint.GetGlyphs(text));
Assert.NotEqual(0, paint.GetGlyphs(text)[0]);
}
public void PlainGlyphsReturnsTheCorrectNumberOfCharacters()
{
const string text = "Hello World!";
var paint = new SKPaint();
Assert.Equal(text.Length, paint.CountGlyphs(text));
Assert.Equal(text.Length, paint.GetGlyphs(text).Length);
}
public void TestImplicitBounds()
{
var builder = new SKTextBlobBuilder();
var font = new SKPaint();
font.TextSize = 0;
var txt = "BOOO";
var glyphs = font.GetGlyphs(txt);
font.TextEncoding = SKTextEncoding.GlyphId;
builder.AddPositionedRun(font, glyphs, new SKPoint[glyphs.Length]);
var blob = builder.Build();
Assert.True(blob.Bounds.IsEmpty);
}
public void DrawTextBlobIsTheSameAsDrawText()
{
var info = new SKImageInfo(300, 300);
var text = "SkiaSharp";
byte[] textPixels;
using (var bmp = new SKBitmap(info))
using (var canvas = new SKCanvas(bmp))
using (var paint = new SKPaint())
{
paint.TextSize = 50;
paint.TextAlign = SKTextAlign.Center;
canvas.Clear(SKColors.White);
canvas.DrawText(text, 150, 175, paint);
textPixels = bmp.Bytes;
}
byte[] glyphsPixels;
using (var bmp = new SKBitmap(info))
using (var canvas = new SKCanvas(bmp))
using (var paint = new SKPaint())
{
ushort[] glyphs;
using (var glyphsp = new SKPaint())
glyphs = glyphsp.GetGlyphs(text);
paint.TextSize = 50;
paint.TextAlign = SKTextAlign.Center;
paint.TextEncoding = SKTextEncoding.GlyphId;
canvas.Clear(SKColors.White);
using (var builder = new SKTextBlobBuilder())
{
builder.AddRun(paint, 0, 0, glyphs);
canvas.DrawText(builder.Build(), 150, 175, paint);
}
glyphsPixels = bmp.Bytes;
}
Assert.Equal(textPixels, glyphsPixels);
}
