Adjustments for buggy linux drawing

TS3AudioBot/Helper/ImageUtil.cs

@@ -0,0 +1,120 @@
+// TS3AudioBot - An advanced Musicbot for Teamspeak 3
+// Copyright (C) 2016  TS3AudioBot contributors
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+// 
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+namespace TS3AudioBot.Helper
+{
+	using System;
+	using System.Collections.Generic;
+	using System.Drawing;
+	using System.Drawing.Drawing2D;
+	using System.Drawing.Text;
+
+	static class ImageUtil
+	{
+		private static StringFormat avatarTextFormat = new StringFormat { Alignment = StringAlignment.Near, LineAlignment = StringAlignment.Near };
+		private static Pen avatarTextOutline = new Pen(Color.Black, 4) { LineJoin = LineJoin.Round };
+
+		public static void BuildStringImage(string str, Image img, RectangleF rect)
+		{
+			using (var graphics = Graphics.FromImage(img))
+			{
+				if (Util.IsLinux)
+				{
+					BuildStringImageLinux(str, graphics, rect);
+				}
+				else
+				{
+					using (var gp = new GraphicsPath())
+					{
+						gp.AddString(str, FontFamily.GenericSansSerif, 0, 15, rect, avatarTextFormat);
+
+						graphics.InterpolationMode = InterpolationMode.High;
+						graphics.SmoothingMode = SmoothingMode.HighQuality;
+						graphics.TextRenderingHint = TextRenderingHint.AntiAlias;
+						graphics.CompositingQuality = CompositingQuality.HighQuality;
+
+						graphics.DrawPath(avatarTextOutline, gp);
+						graphics.FillPath(Brushes.White, gp);
+					}
+				}
+			}
+		}
+
+		private static void BuildStringImageLinux(string str, Graphics target, RectangleF rect)
+		{
+			const int maxMonoBugWidth = 150;
+
+			using (var gp = new GraphicsPath())
+			using (var builder = new Bitmap(maxMonoBugWidth, 100))
+			using (var bg = Graphics.FromImage(builder))
+			{
+				gp.AddString("X", FontFamily.GenericMonospace, 0, 15, rect, avatarTextFormat);
+				var bounds = gp.GetBounds();
+				var charW = bounds.Width;
+				var charH = bounds.Height * 2;
+				if (charW < 0.1e-6)
+					return;
+
+				var buildRect = new RectangleF(0, 0, maxMonoBugWidth, charH);
+
+				var sep = new List<string>();
+
+				bg.InterpolationMode = InterpolationMode.High;
+				bg.SmoothingMode = SmoothingMode.HighQuality;
+				bg.TextRenderingHint = TextRenderingHint.AntiAlias;
+				bg.CompositingQuality = CompositingQuality.HighQuality;
+				target.CompositingQuality = CompositingQuality.HighQuality;
+
+				int lastBreak = 0;
+				int lastBreakOption = 0;
+				for (int i = 0; i < str.Length; i++)
+				{
+					if (!char.IsLetterOrDigit(str[i]))
+					{
+						lastBreakOption = i;
+					}
+
+					if ((i - lastBreak) * charW >= rect.Width && lastBreak != lastBreakOption)
+					{
+						sep.Add(str.Substring(lastBreak, lastBreakOption - lastBreak));
+						lastBreak = lastBreakOption;
+					}
+				}
+				sep.Add(str.Substring(lastBreak));
+
+				var step = (int)(maxMonoBugWidth / charW) - 1;
+				for (int i = 0; i < sep.Count; i++)
+				{
+					var line = sep[i];
+					float flLeft = 0;
+					for (int j = 0; j * step < line.Length; j++)
+					{
+						var part = line.Substring(j * step, Math.Min(step, line.Length - j * step));
+						gp.Reset();
+						gp.AddString(part, FontFamily.GenericMonospace, 0, 15, buildRect, avatarTextFormat);
+
+						bg.Clear(Color.Transparent);
+						bg.DrawPath(avatarTextOutline, gp);
+						bg.FillPath(Brushes.White, gp);
+
+						target.DrawImageUnscaled(builder, (int)(rect.X + j * (maxMonoBugWidth - 5)), (int)(rect.Y + i * charH));
+						flLeft += gp.GetBounds().Width;
+					}
+				}
+			}
+		}
+	}
+}

TS3AudioBot/MainBot.cs

@@ -80,8 +80,6 @@ internal static void Main(string[] args)
 		public RightsManager RightsManager { get; private set; }
 
 		public bool QuizMode { get; set; }
-		private StringFormat avatarTextFormat = new StringFormat { Alignment = StringAlignment.Near, LineAlignment = StringAlignment.Near };
-		private Pen avatarTextOutline = new Pen(Color.Black, 4) { LineJoin = System.Drawing.Drawing2D.LineJoin.Round };
 
 		public MainBot()
 		{
@@ -1606,21 +1604,10 @@ private void GenerateStatusImage(object sender, EventArgs e)
 
 				using (var bmp = thumresult.Value)
 				{
-					using (var graphics = Graphics.FromImage(bmp))
-					using (var gp = new System.Drawing.Drawing2D.GraphicsPath())
-					{
-						gp.AddString("Now playing: " + startEvent.ResourceData.ResourceTitle,
-							FontFamily.GenericSansSerif, 0, 15,
-							new RectangleF(0, 0, bmp.Width, bmp.Height), avatarTextFormat);
-
-						graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
-						graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
-						graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
-						graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
-
-						graphics.DrawPath(avatarTextOutline, gp);
-						graphics.FillPath(Brushes.White, gp);
-					}
+					ImageUtil.BuildStringImage(
+						"Now playing: " + startEvent.ResourceData.ResourceTitle,
+						bmp,
+						new RectangleF(0, 0, bmp.Width, bmp.Height));
 					using (var mem = new MemoryStream())
 					{
 						bmp.Save(mem, System.Drawing.Imaging.ImageFormat.Png);
@@ -1657,9 +1644,7 @@ public void Dispose()
 			if (!isDisposed) isDisposed = true;
 			else return;
 			Log.Write(Log.Level.Info, "Exiting...");
-
-			avatarTextOutline.Dispose();
-
+
 			WebManager?.Dispose(); // before: logStream,
 			WebManager = null;
 

TS3AudioBot/TS3AudioBot.csproj

@@ -98,6 +98,7 @@
     <Compile Include="CommandSystem\CommandResults\JsonCommandResult.cs" />
     <Compile Include="CommandSystem\CommandResults\StringCommandResult.cs" />
     <Compile Include="Helper\Cache.cs" />
+    <Compile Include="Helper\ImageUtil.cs" />
     <Compile Include="ResourceFactories\AudioType.cs" />
     <Compile Include="ResourceFactories\IFactory.cs" />
     <Compile Include="ResourceFactories\IThumbnailFactory.cs" />