private static void FillBuffer(Buffer buffer, ReadOnlySlice <char> text) { buffer.ContentType = ContentType.Unicode; var i = 0; while (i < text.Length) { var codepoint = Codepoint.ReadAt(text, i, out var count); var cluster = (uint)(text.Start + i); if (codepoint.IsBreakChar) { if (i + 1 < text.Length) { var nextCodepoint = Codepoint.ReadAt(text, i + 1, out _); if (nextCodepoint == '\r' && codepoint == '\n' || nextCodepoint == '\n' && codepoint == '\r') { count++; buffer.Add('\u200C', cluster); buffer.Add('\u200D', cluster); } else { buffer.Add('\u200C', cluster); } } else { buffer.Add('\u200C', cluster); } } else { buffer.Add(codepoint, cluster); } i += count; } }
public GlyphRun ShapeText(ReadOnlySlice <char> text, Typeface typeface, double fontRenderingEmSize, CultureInfo culture) { using (var buffer = new Buffer()) { buffer.ContentType = ContentType.Unicode; var breakCharPosition = text.Length - 1; var codepoint = Codepoint.ReadAt(text, breakCharPosition, out var count); if (codepoint.IsBreakChar) { var breakCharCount = 1; if (text.Length > 1) { var previousCodepoint = Codepoint.ReadAt(text, breakCharPosition - count, out _); if (codepoint == '\r' && previousCodepoint == '\n' || codepoint == '\n' && previousCodepoint == '\r') { breakCharCount = 2; } } if (breakCharPosition != text.Start) { buffer.AddUtf16(text.Buffer.Span.Slice(0, text.Length - breakCharCount)); } var cluster = buffer.GlyphInfos.Length > 0 ? buffer.GlyphInfos[buffer.Length - 1].Cluster + 1 : (uint)text.Start; switch (breakCharCount) { case 1: buffer.Add('\u200C', cluster); break; case 2: buffer.Add('\u200C', cluster); buffer.Add('\u200D', cluster); break; } } else { buffer.AddUtf16(text.Buffer.Span); } buffer.Language = new Language(culture ?? CultureInfo.CurrentCulture); buffer.GuessSegmentProperties(); var glyphTypeface = typeface.GlyphTypeface; var font = ((GlyphTypefaceImpl)glyphTypeface.PlatformImpl).Font; font.Shape(buffer); font.GetScale(out var scaleX, out _); var textScale = fontRenderingEmSize / scaleX; var bufferLength = buffer.Length; var glyphInfos = buffer.GetGlyphInfoSpan(); var glyphPositions = buffer.GetGlyphPositionSpan(); var glyphIndices = new ushort[bufferLength]; var clusters = new ushort[bufferLength]; double[] glyphAdvances = null; Vector[] glyphOffsets = null; for (var i = 0; i < bufferLength; i++) { glyphIndices[i] = (ushort)glyphInfos[i].Codepoint; clusters[i] = (ushort)(text.Start + glyphInfos[i].Cluster); if (!glyphTypeface.IsFixedPitch) { SetAdvance(glyphPositions, i, textScale, ref glyphAdvances); } SetOffset(glyphPositions, i, textScale, ref glyphOffsets); } return(new GlyphRun(glyphTypeface, fontRenderingEmSize, new ReadOnlySlice <ushort>(glyphIndices), new ReadOnlySlice <double>(glyphAdvances), new ReadOnlySlice <Vector>(glyphOffsets), text, new ReadOnlySlice <ushort>(clusters))); } }
public GlyphRun ShapeText(ReadOnlySlice <char> text, TextFormat textFormat) { using (var buffer = new Buffer()) { buffer.ContentType = ContentType.Unicode; var breakCharPosition = text.Length - 1; var codepoint = Codepoint.ReadAt(text, breakCharPosition, out var count); if (codepoint.IsBreakChar) { var breakCharCount = 1; if (text.Length > 1) { var previousCodepoint = Codepoint.ReadAt(text, breakCharPosition - count, out _); if (codepoint == '\r' && previousCodepoint == '\n' || codepoint == '\n' && previousCodepoint == '\r') { breakCharCount = 2; } } if (breakCharPosition != text.Start) { buffer.AddUtf16(text.Buffer.Span.Slice(0, text.Length - breakCharCount)); } var cluster = buffer.GlyphInfos.Length > 0 ? buffer.GlyphInfos[buffer.Length - 1].Cluster + 1 : (uint)text.Start; switch (breakCharCount) { case 1: buffer.Add('\u200C', cluster); break; case 2: buffer.Add('\u200C', cluster); buffer.Add('\u200D', cluster); break; } } else { buffer.AddUtf16(text.Buffer.Span); } buffer.GuessSegmentProperties(); var glyphTypeface = textFormat.Typeface.GlyphTypeface; var font = ((GlyphTypefaceImpl)glyphTypeface.PlatformImpl).Font; font.Shape(buffer); font.GetScale(out var scaleX, out _); var textScale = textFormat.FontRenderingEmSize / scaleX; var len = buffer.Length; var info = buffer.GetGlyphInfoSpan(); var pos = buffer.GetGlyphPositionSpan(); var glyphIndices = new ushort[len]; var clusters = new ushort[len]; var glyphAdvances = new double[len]; var glyphOffsets = new Vector[len]; for (var i = 0; i < len; i++) { glyphIndices[i] = (ushort)info[i].Codepoint; clusters[i] = (ushort)(text.Start + info[i].Cluster); var advanceX = pos[i].XAdvance * textScale; // Depends on direction of layout //var advanceY = pos[i].YAdvance * textScale; glyphAdvances[i] = advanceX; var offsetX = pos[i].XOffset * textScale; var offsetY = pos[i].YOffset * textScale; glyphOffsets[i] = new Vector(offsetX, offsetY); } return(new GlyphRun(glyphTypeface, textFormat.FontRenderingEmSize, new ReadOnlySlice <ushort>(glyphIndices), new ReadOnlySlice <double>(glyphAdvances), new ReadOnlySlice <Vector>(glyphOffsets), text, new ReadOnlySlice <ushort>(clusters))); } }