glbackend tests, copy first try from hg reposglbackend

1 files changed, 307 insertions, 0 deletions

diff --git a/src/OpenGL/GLBackend/Font/FontFace.cs b/src/OpenGL/GLBackend/Font/FontFace.cs
new file mode 100644
index 00000000..0fe75233
--- /dev/null
+++ b/src/OpenGL/GLBackend/Font/FontFace.cs
@@ -0,0 +1,307 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using SharpFont;
+using System.Diagnostics;
+using System.Linq;
+using System.Text.RegularExpressions;
+using OpenTK.Graphics.OpenGL;
+
+namespace go.GLBackend
+{
+	public class FontFace
+	{
+		public static int testTexture;
+
+		static List<FontFace> fonts = new List<FontFace>();
+		public Dictionary<uint,Dictionary<uint, glGlyph>> glyphesCache = new Dictionary<uint, Dictionary<uint, glGlyph>>();
+
+		#region CTOR
+		public FontFace ()
+		{
+		}
+		#endregion
+
+		string _name = "droid";
+		string _family;
+		string _fontPath;
+		public FontExtents originalFontExtents;
+
+		FontStyle _style = FontStyle.Normal;
+		FontFlag _flags = FontFlag.None;
+
+		public string Name {
+			get { return _name; }
+			set { _name = value; }
+		}
+		public string Family {
+			get {return _family;}
+			set {_family = value;}
+		}
+		public string FontPath {
+			get { return _fontPath; }
+			set { _fontPath = value; }
+		}
+			
+		public FontStyle Style {
+			get { return _style; }
+			set { _style = value; }
+		}
+		public FontFlag Flags {
+			get { return _flags; }
+			set { _flags = value; }
+		}
+
+		public FontSlant Slant {
+			get{ 
+				if ((Style & FontStyle.Italic) == FontStyle.Italic)
+					return FontSlant.Italic;
+				if ((Style & FontStyle.Oblique) == FontStyle.Oblique)
+					return FontSlant.Oblique;
+				return FontSlant.Normal;
+			}
+		}
+		public FontWeight Wheight {
+			get{ return (Style & FontStyle.Bold) == FontStyle.Bold ? FontWeight.Bold : FontWeight.Normal; }
+		}
+
+		public static FontFace SearchFont(Font font)
+		{
+			FontFace[] tmp = fonts.Where (f =>
+				(string.Compare(f.Name,font.Name,true)==0 && f.Style == font.Style)).ToArray();
+
+			tmp = tmp.Where (f => (f.Flags & font.Flags) == font.Flags).OrderBy(f=>f.Flags).ToArray();
+
+			return tmp.FirstOrDefault();
+		}
+
+		public static void BuildFontsList(string _path)
+		{
+			DirectoryInfo dir = new DirectoryInfo (_path);
+			try
+			{
+				using (Library lib = new Library())
+				{
+					foreach (FileInfo f in dir.GetFiles("*.ttf",SearchOption.AllDirectories)) {
+						try {
+
+							Face face = new Face(lib,f.FullName, 0);
+							FontFace font = new FontFace();
+
+							//TODO:test if font is scalable, if not=>continue
+							font.Family = face.FamilyName;
+							font.FontPath = f.FullName;
+											
+							//check if no particularities hidde in family name
+							font.Name = "";
+							string[] styles = face.FamilyName.Split(' ');
+							for (int i = 0; i < styles.Length; i++) {
+								FontFlag fl;
+								FontStyle fs;
+								if (Enum.TryParse<FontFlag> (styles [i], true, out fl))
+									font.Flags |= fl;
+								else if (Enum.TryParse<FontStyle> (styles [i], true, out fs))
+									font.Style |= fs;
+								else//add only unknown word to create shortest possible name
+									font.Name += styles[i] + " ";
+							}
+							font.Name = font.Name.Trim();
+
+							styles = face.StyleName.Split(' ');
+							for (int i = 0; i < styles.Length; i++) {
+								switch (styles[i].ToLowerInvariant()) {
+								case "regular":
+								case "normal":
+									break;
+								case "bold":
+									font.Style |= FontStyle.Bold;
+									break;
+								case "italic":
+									font.Style |= FontStyle.Italic;
+									break;
+								case "oblique":
+									font.Style |= FontStyle.Oblique;
+									break;
+								default:
+									FontFlag fl;
+									if (Enum.TryParse<FontFlag>(styles[i], true, out fl))
+										font.Flags |= fl;
+									break;
+								}
+
+							}								
+							fonts.Add(font);
+							face.Dispose();
+						}
+						catch (FreeTypeException ee)
+						{ Console.Write(ee.Error.ToString() + ": " + f.FullName); }
+					}
+				}
+			}
+			catch (FreeTypeException e)
+			{ Console.Write(e.Error.ToString()); }
+		}
+
+		const int FONT_TEX_SIZE = 1024;
+
+		public void buildGlyphesTextures(uint activeSize, uint startChar, uint endChar){
+			try
+			{
+				using (Library lib = new Library())
+				{
+					Face face = new Face(lib,_fontPath, 0);
+
+					face.SetPixelSizes(0,activeSize);
+
+					//face.SetCharSize(0, 32 * 64, 0, 96);
+
+					originalFontExtents = new FontExtents();
+					originalFontExtents.Ascent = face.Size.Metrics.Ascender >> 6;
+					originalFontExtents.Descent = face.Size.Metrics.Descender >> 6;
+					originalFontExtents.Height = face.Size.Metrics.Height >> 6;
+					originalFontExtents.MaxXAdvance = face.Size.Metrics.MaxAdvance >> 6;
+					originalFontExtents.MaxYAdvance = face.MaxAdvanceHeight >> 6;
+
+					if (!glyphesCache.ContainsKey(activeSize))
+						glyphesCache [activeSize] = new Dictionary<uint, glGlyph>();
+
+					buildTexture(ref face,activeSize,startChar,endChar);
+
+					face.Dispose();
+				}
+			}
+			catch (FreeTypeException e)
+			{ Console.Write(e.Error.ToString()); }
+		}
+			
+		void setTextureData(int tex, byte[] _buffer)
+		{
+			GL.BindTexture(TextureTarget.Texture2D, tex);
+			GL.TexImage2D(TextureTarget.Texture2D,0,
+				PixelInternalFormat.R8, FONT_TEX_SIZE, FONT_TEX_SIZE,0,
+				OpenTK.Graphics.OpenGL.PixelFormat.Red, PixelType.UnsignedByte,_buffer);
+
+			GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Nearest);
+			GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
+			GL.BindTexture(TextureTarget.Texture2D, 0);
+
+			byte[] pixels = new byte[FONT_TEX_SIZE * FONT_TEX_SIZE * 4];
+
+			for (int x = 0; x < FONT_TEX_SIZE; x++)
+			{
+				for (int y = 0; y < FONT_TEX_SIZE; y++)
+				{
+					byte v = _buffer[x + y * FONT_TEX_SIZE];
+
+					pixels[(x + y * FONT_TEX_SIZE) * 4] = v;
+					pixels[(x + y * FONT_TEX_SIZE) * 4 + 1] = v;
+					pixels[(x + y * FONT_TEX_SIZE) * 4 + 2] = v;
+					pixels[(x + y * FONT_TEX_SIZE) * 4 + 3] = 255;
+				}
+			}
+			System.Drawing.Bitmap bmp;
+			unsafe
+			{
+				bmp = new System.Drawing.Bitmap(FONT_TEX_SIZE, FONT_TEX_SIZE, System.Drawing.Imaging.PixelFormat.Format32bppArgb);//, ptr);
+				System.Drawing.Imaging.BitmapData data = bmp.LockBits(new System.Drawing.Rectangle(0, 0, FONT_TEX_SIZE, FONT_TEX_SIZE),
+					System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+
+				System.Runtime.InteropServices.Marshal.Copy(pixels, 0, data.Scan0, FONT_TEX_SIZE * FONT_TEX_SIZE * 4);
+
+				bmp.UnlockBits(data);
+			}
+
+			bmp.Save(@"/home/jp/fonttex.png");
+
+
+		}
+
+
+		void buildTexture(ref Face face,uint activeSize, uint startChar, uint endChar){
+			int texPage = GL.GenTexture ();
+			byte[] buffer = new byte[FONT_TEX_SIZE*FONT_TEX_SIZE];
+
+			int penX = 0,
+				penY = 0;
+
+			int maxBmpHeight = 0;
+
+			for(uint c=startChar;c<endChar;c++)
+			{
+				uint glyphIndex = face.GetCharIndex((uint)c);
+				if (glyphIndex==0)
+					continue;
+				//face.LoadChar((uint)c, LoadFlags.Render, LoadTarget.Normal);
+				face.LoadGlyph(glyphIndex, LoadFlags.Render, LoadTarget.Normal);
+				testTexture = texPage;
+
+				GlyphSlot slot = face.Glyph;
+				FTBitmap bmp = slot.Bitmap;
+
+				if (penX+bmp.Width > FONT_TEX_SIZE){
+					penX = 0;
+					penY += maxBmpHeight;
+					maxBmpHeight = 0;
+				}
+
+				if (penY+bmp.Rows > FONT_TEX_SIZE)
+				{
+					//glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+					setTextureData (texPage, buffer);
+					texPage = GL.GenTexture ();
+					buffer = new byte[FONT_TEX_SIZE*FONT_TEX_SIZE];
+					penX = 0;
+					penY = 0;
+					maxBmpHeight = 0;
+				}
+
+				Rectangle tmp = new Rectangle (
+					penX,
+					penY,
+					bmp.Width, bmp.Rows);
+
+				for(int y=0; y<bmp.Rows; y++)
+				{
+					for(int x=0; x<bmp.Width; x++)
+						buffer[ penX + x + (penY + y)* FONT_TEX_SIZE ] =
+							bmp.BufferData[x + y * bmp.Width];
+				}
+				glyphesCache [activeSize][c] = new glGlyph() 
+				{
+					texId = texPage,
+					texX = (float)penX / FONT_TEX_SIZE,
+					texY = (float)penY / FONT_TEX_SIZE,
+					texWidth = (float)(bmp.Width) / FONT_TEX_SIZE,
+					texHeight = (float)(bmp.Rows)  / FONT_TEX_SIZE,
+
+//					texCoord = new Rectangle(
+//						penX / FONT_TEX_SIZE,
+//						penY / FONT_TEX_SIZE,
+//						(bmp.Width) / FONT_TEX_SIZE,
+//						(bmp.Rows)  / FONT_TEX_SIZE),
+					dims = new Size(bmp.Width , bmp.Rows),
+					bmpLeft = slot.BitmapLeft, bmpTop = slot.BitmapTop, advanceX = slot.Advance.X>>6,advanceY = slot.Advance.Y>>6
+				};
+
+				if (bmp.Rows>maxBmpHeight)
+					maxBmpHeight=bmp.Rows;
+
+				penX += bmp.Width;
+			}
+
+			if (penX>0 || penY>0)
+				setTextureData(texPage, buffer);
+		}
+
+		public override string ToString()
+		{
+			string tmp = Name;
+			if (Style != FontStyle.Normal)
+				tmp += "," + Style.ToString ();
+			if (Flags != FontFlag.None)
+				tmp += "," + Flags.ToString ();
+			return tmp;
+		}
+	}
+}
+