/// <summary> /// Renders the <see cref="Duality.Resources.Font"/> using the specified system font. /// This method assumes that the system font's size and style match the one specified in /// the specified Duality font. /// </summary> private FontData RenderGlyphs(SysDrawFont internalFont, FontCharSet charSet, bool antialiazing, bool monospace) { FontGlyphData[] glyphs = new FontGlyphData[charSet.Chars.Length]; for (int i = 0; i < glyphs.Length; i++) { glyphs[i].Glyph = charSet.Chars[i]; } int bodyAscent = 0; int baseLine = 0; int descent = 0; int ascent = 0; TextRenderingHint textRenderingHint; if (antialiazing) { textRenderingHint = TextRenderingHint.AntiAliasGridFit; } else { textRenderingHint = TextRenderingHint.SingleBitPerPixelGridFit; } int cols; int rows; cols = rows = (int)Math.Ceiling(Math.Sqrt(glyphs.Length)); PixelData pixelLayer = new PixelData( MathF.RoundToInt(cols * internalFont.Size * 1.2f), MathF.RoundToInt(rows * internalFont.Height * 1.2f), ColorRgba.TransparentBlack); Bitmap measureBm = new Bitmap(1, 1); Rect[] atlas = new Rect[glyphs.Length]; PixelData[] glyphBitmaps = new PixelData[glyphs.Length]; using (Graphics measureGraphics = Graphics.FromImage(measureBm)) { Brush fntBrush = new SolidBrush(Color.Black); StringFormat formatDef = StringFormat.GenericDefault; formatDef.LineAlignment = StringAlignment.Near; formatDef.FormatFlags = 0; StringFormat formatTypo = StringFormat.GenericTypographic; formatTypo.LineAlignment = StringAlignment.Near; int x = 1; int y = 1; for (int i = 0; i < glyphs.Length; ++i) { string str = glyphs[i].Glyph.ToString(CultureInfo.InvariantCulture); bool isSpace = char.IsWhiteSpace(glyphs[i].Glyph); SizeF charSize = measureGraphics.MeasureString(str, internalFont, pixelLayer.Width, formatDef); // Rasterize a single glyph for rendering Bitmap bm = new Bitmap((int)Math.Ceiling(Math.Max(1, charSize.Width)), internalFont.Height + 1); using (Graphics glyphGraphics = Graphics.FromImage(bm)) { glyphGraphics.Clear(Color.Transparent); glyphGraphics.TextRenderingHint = textRenderingHint; glyphGraphics.DrawString(str, internalFont, fntBrush, new RectangleF(0, 0, bm.Width, bm.Height), formatDef); } glyphBitmaps[i] = new PixelData(); glyphBitmaps[i].FromBitmap(bm); // Rasterize a single glyph in typographic mode for metric analysis PixelData glyphTempTypo; if (!isSpace) { Point2 glyphTempOpaqueTopLeft; Point2 glyphTempOpaqueSize; glyphBitmaps[i].GetOpaqueBoundaries(out glyphTempOpaqueTopLeft, out glyphTempOpaqueSize); glyphBitmaps[i].SubImage(glyphTempOpaqueTopLeft.X, 0, glyphTempOpaqueSize.X, glyphBitmaps[i].Height); if (charSet.CharBodyAscentRef.Contains(glyphs[i].Glyph)) { bodyAscent += glyphTempOpaqueSize.Y; } if (charSet.CharBaseLineRef.Contains(glyphs[i].Glyph)) { baseLine += glyphTempOpaqueTopLeft.Y + glyphTempOpaqueSize.Y; } if (charSet.CharDescentRef.Contains(glyphs[i].Glyph)) { descent += glyphTempOpaqueTopLeft.Y + glyphTempOpaqueSize.Y; } bm = new Bitmap((int)Math.Ceiling(Math.Max(1, charSize.Width)), internalFont.Height + 1); using (Graphics glyphGraphics = Graphics.FromImage(bm)) { glyphGraphics.Clear(Color.Transparent); glyphGraphics.TextRenderingHint = textRenderingHint; glyphGraphics.DrawString(str, internalFont, fntBrush, new RectangleF(0, 0, bm.Width, bm.Height), formatTypo); } glyphTempTypo = new PixelData(); glyphTempTypo.FromBitmap(bm); glyphTempTypo.Crop(true, false); } else { glyphTempTypo = glyphBitmaps[i]; } // Update xy values if it doesn't fit anymore if (x + glyphBitmaps[i].Width + 2 > pixelLayer.Width) { x = 1; y += internalFont.Height + MathF.Clamp((int)MathF.Ceiling(internalFont.Height * 0.1875f), 3, 10); } // Memorize atlas coordinates & glyph data glyphs[i].Size = glyphBitmaps[i].Size; glyphs[i].Offset.X = glyphBitmaps[i].Width - glyphTempTypo.Width; glyphs[i].Offset.Y = 0; // TTF fonts are rendered on blocks that are the whole size of the height - so no need for offset if (isSpace) { glyphs[i].Size.X /= 2; glyphs[i].Offset.X /= 2; } glyphs[i].Advance = glyphs[i].Size.X - glyphs[i].Offset.X; atlas[i].X = x; atlas[i].Y = y; atlas[i].W = glyphBitmaps[i].Width; atlas[i].H = (internalFont.Height + 1); // Draw it onto the font surface glyphBitmaps[i].DrawOnto(pixelLayer, BlendMode.Solid, x, y); x += glyphBitmaps[i].Width + MathF.Clamp((int)MathF.Ceiling(internalFont.Height * 0.125f), 2, 10); } } // White out texture except alpha channel. for (int i = 0; i < pixelLayer.Data.Length; i++) { pixelLayer.Data[i].R = 255; pixelLayer.Data[i].G = 255; pixelLayer.Data[i].B = 255; } // Monospace offset and advance adjustments if (monospace) { float maxGlyphWidth = 0; for (int i = 0; i < glyphs.Length; i++) { maxGlyphWidth = Math.Max(maxGlyphWidth, glyphs[i].Size.X); } for (int i = 0; i < glyphs.Length; ++i) { glyphs[i].Offset.X -= (int)Math.Round((maxGlyphWidth - glyphs[i].Size.X) / 2.0f); glyphs[i].Advance = maxGlyphWidth; } } // Determine Font properties { float lineSpacing = internalFont.FontFamily.GetLineSpacing(internalFont.Style); float emHeight = internalFont.FontFamily.GetEmHeight(internalFont.Style); float cellAscent = internalFont.FontFamily.GetCellAscent(internalFont.Style); float cellDescent = internalFont.FontFamily.GetCellDescent(internalFont.Style); ascent = (int)Math.Round(cellAscent * internalFont.Size / emHeight); bodyAscent /= charSet.CharBodyAscentRef.Length; baseLine /= charSet.CharBaseLineRef.Length; descent = (int)Math.Round(((float)descent / charSet.CharDescentRef.Length) - (float)baseLine); } // Aggregate rendered and generated data into our return value FontMetrics metrics = new FontMetrics( size: internalFont.SizeInPoints, height: (int)internalFont.Height, ascent: ascent, bodyAscent: bodyAscent, descent: descent, baseLine: baseLine, monospace: monospace); // Determine kerning pairs FontKerningPair[] kerningPairs = null; if (monospace) { kerningPairs = null; } else { kerningPairs = this.GatherKerningPairs(glyphs, metrics, glyphBitmaps); } return(new FontData(pixelLayer, atlas, glyphs, metrics, kerningPairs)); }
public GlyphItemViewModel(FontGlyphData data) { this.GlyphData = data; }