From afd70b2e252b95170ab5901b383b6bb28539385d Mon Sep 17 00:00:00 2001 From: the_fiddler Date: Tue, 6 Nov 2007 21:02:01 +0000 Subject: [PATCH] Changed implementation. Now tests font rendering on different sizes. --- Source/Examples/Tutorial/Fonts.cs | 157 +++++++----------------------- 1 file changed, 36 insertions(+), 121 deletions(-) diff --git a/Source/Examples/Tutorial/Fonts.cs b/Source/Examples/Tutorial/Fonts.cs index 44c53c73..255b131b 100644 --- a/Source/Examples/Tutorial/Fonts.cs +++ b/Source/Examples/Tutorial/Fonts.cs @@ -15,84 +15,64 @@ using OpenTK.OpenGL; using OpenTK.Input; using System.IO; using OpenTK.OpenGL.Enums; +using OpenTK.Math; namespace Examples.Tutorial { class Fonts : GameWindow, IExample { public Fonts() : base(new DisplayMode(800, 600), String.Format("OpenTK | Tutorial {0}: Fonts", order)) + { } + + ITextPrinter text = new TextPrinter(); + + // Load some different TextureFont sizes to compare their quality. + TextureFont[] fonts = new TextureFont[] { - this.VSync = VSyncMode.On; - } + new TextureFont(new Font(FontFamily.GenericSerif, 8.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 10.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 12.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 14.0f)), - TextureFont serif = new TextureFont(new Font(FontFamily.GenericSerif, 24.0f)); + new TextureFont(new Font(FontFamily.GenericSerif, 16.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 18.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 20.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 22.0f)), - //string[] poem = new StreamReader("Data/Poem.txt").ReadToEnd().Replace('\r', ' ').Split('\n'); - string[] poem = new string[] { "AAA", "AAAAA" }; - float scroll_speed; - float scroll_position; - float initial_position; - float warparound_position; - float current_position; + new TextureFont(new Font(FontFamily.GenericSerif, 24.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 26.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 28.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 30.0f)), + + new TextureFont(new Font(FontFamily.GenericSerif, 32.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 34.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 36.0f)), + new TextureFont(new Font(FontFamily.GenericSerif, 38.0f)), + }; + TextHandle[] handles; // Used to cache the strings we want to print. public override void OnLoad(EventArgs e) { - GL.Enable(EnableCap.Texture2d); - GL.Enable(EnableCap.Blend); - GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha); + GL.ClearColor(Color.SteelBlue); - //serif.LoadGlyphs("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz,.!?;()\'- "); - serif.LoadGlyphs("A"); - - GL.ClearColor(Color.Gray); - - current_position = initial_position; - scroll_speed = -1.0f; - /* - display_list = GL.GenLists(1); - GL.NewList(1, GL.Enums.ListMode.COMPILE); - - GL.PushMatrix(); - - - - GL.PopMatrix(); - - GL.EndList();*/ + handles = new TextHandle[fonts.Length]; + for (int i = handles.Length; --i >= 0; ) + text.Prepare("Hello, world!", fonts[i], out handles[i]); } protected override void OnResize(OpenTK.Platform.ResizeEventArgs e) { GL.Viewport(0, 0, Width, Height); - - initial_position = Height + serif.Height; - warparound_position = -(poem.Length + 1) * serif.Height; } public override void OnUpdateFrame(UpdateFrameEventArgs e) { - if (Keyboard[Key.Space]) - scroll_speed = 0.0f; - if (Keyboard[Key.Down]) - scroll_speed += 1; - if (Keyboard[Key.Up]) - scroll_speed -= 1; if (Keyboard[Key.Escape]) this.Exit(); } public override void OnRenderFrame(RenderFrameEventArgs e) { - // We'll start printing from the lower left corner of the screen. The text - // will slowly move updwards - the user can control the movement speed with - // the keyboard arrows and the space bar. - current_position += scroll_speed * (float)e.ScaleFactor; - if (scroll_speed > 0.0f && current_position > initial_position) - current_position = warparound_position; - else if (scroll_speed < 0.0f && current_position < warparound_position) - current_position = initial_position; - scroll_position = current_position; - GL.Clear(ClearBufferMask.ColorBufferBit); GL.MatrixMode(MatrixMode.Projection); @@ -102,77 +82,12 @@ namespace Examples.Tutorial GL.MatrixMode(MatrixMode.Modelview); GL.LoadIdentity(); - GL.Translate(0.0f, scroll_position, 0.0f); - - //RectangleF rect = serif.FindRectangle('A'); - - RectangleF rect = new RectangleF(); - float width, height; - int texture; - serif.GlyphData('A', ref rect, out width, out height, out texture); - - GL.BindTexture(TextureTarget.Texture2d, texture); - - GL.Enable(EnableCap.Blend); - GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha); - - //GL.Color4(Color.White); - GL.Begin(BeginMode.Quads); - - GL.TexCoord2(rect.Left, rect.Top); - GL.Vertex2(0.0, 0.0); - GL.TexCoord2(rect.Right, rect.Top); - GL.Vertex2(width, 0.0); - GL.TexCoord2(rect.Right, rect.Bottom); - GL.Vertex2(width, height); - GL.TexCoord2(rect.Left, rect.Bottom); - GL.Vertex2(0.0, height); - - GL.End(); - - serif.Draw(); - - /* - int i = 0, line = 0; - float x_pos, accum_x_pos = 0.0f; - foreach (string str in poem) + // Font size test: + for (int i = 0; i < handles.Length; i++) { - GL.Translate(0.0f, scroll_position + serif.Height * line, 0.0f); - foreach (char c in str) - { - //serif.PrintFast(c); - - RectangleF rect = serif.FindRectangle(c); - - //GL.Color4(Color.White); - GL.Begin(GL.Enums.BeginMode.QUADS); - - GL.TexCoord2(rect.Left, rect.Top); - GL.Vertex2(0.0f, 0.0f); - - GL.TexCoord2(rect.Right, rect.Top); - GL.Vertex2(rect.Width * 512, 0.0f); - - GL.TexCoord2(rect.Right, rect.Bottom); - GL.Vertex2(rect.Width * 512, rect.Height * 512); - - GL.TexCoord2(rect.Left, rect.Bottom); - GL.Vertex2(0.0f, rect.Height * 512); - - GL.End(); - - - x_pos = serif.MeasureWidth(str.Substring(i++, 1)); - accum_x_pos += x_pos; - - GL.Translate((int)(x_pos + 0.5f), 0.0f, 0.0f); - } - GL.LoadIdentity(); - i = 0; - ++line; + text.Draw(handles[i]); + GL.Translate(0, fonts[i].Height, 0); } - */ - //GL.CallList(display_list); SwapBuffers(); } @@ -180,13 +95,13 @@ namespace Examples.Tutorial #region IExample Members + public static readonly int order = 6; + public void Launch() { Run(30.0, 0.0); } - public static readonly int order = 6; - #endregion } }