Added more comments to CDirect3D.cs

Vocaluxe/Lib/Draw/CDirect3D.cs

@@ -49,6 +49,9 @@ namespace Vocaluxe.Lib.Draw
 
         #endregion private vars
 
+        /// <summary>
+        /// Creates a new Instance of the CDirect3D Class
+        /// </summary>
         public CDirect3D()
         {
             this.Icon = new System.Drawing.Icon(Path.Combine(System.Environment.CurrentDirectory, CSettings.sIcon));
@@ -86,6 +89,8 @@ namespace Vocaluxe.Lib.Draw
             _PresentParameters.Multisample = MultisampleType.None;
             _PresentParameters.MultisampleQuality = 0;
 
+            //Apply antialiasing and check if antialiasing mode is supported
+            #region Antialiasing
             int quality = 0;
             if (CConfig.AAMode == EAntiAliasingModes.x0)
             {
@@ -132,12 +137,15 @@ namespace Vocaluxe.Lib.Draw
                 else
                     CLog.LogError("[Direct3D] This AAMode is not supported by this device or driver, fallback to no AA");
             }
+            #endregion Antialiasing
 
-            if(CConfig.VSync == EOffOn.TR_CONFIG_ON)
+            //Apply the VSync configuration
+            if (CConfig.VSync == EOffOn.TR_CONFIG_ON)
                 _PresentParameters.PresentationInterval = PresentInterval.Default;
             else
                 _PresentParameters.PresentationInterval = PresentInterval.Immediate;
-            
+
+            //GMA 950 graphics devices can only process vertices in software mode
             Capabilities caps = _D3D.GetDeviceCaps(_D3D.Adapters.DefaultAdapter.Adapter, DeviceType.Hardware);
             CreateFlags flags = CreateFlags.None;
             if ((caps.DeviceCaps & DeviceCaps.HWTransformAndLight) != 0)
@@ -147,12 +155,15 @@ namespace Vocaluxe.Lib.Draw
             _Device = new Device(_D3D, _D3D.Adapters.DefaultAdapter.Adapter, DeviceType.Hardware, Handle, flags, _PresentParameters);
 
             this.CenterToScreen();
-            
-            blankMap = new Bitmap(1, 1); //Quick and Dirty, used for DrawColor
+
+            //This creates a new white texture and adds it to the texture pool
+            //This texture is used for the DrawRect method
+            blankMap = new Bitmap(1, 1);
             Graphics g = Graphics.FromImage(blankMap);
             g.Clear(Color.White);
             g.Dispose();
             blankTexture = AddTexture(blankMap);
+
             h = ClientSize.Height;
             w = ClientSize.Width;
             blankMap.Dispose();
@@ -186,9 +197,12 @@ namespace Vocaluxe.Lib.Draw
             RResize();
         }
         #endregion form events
-
+        /// <summary>
+        /// Resizes the viewport
+        /// </summary>
         private void RResize()
         {
+            // The window was minimized, so restore it to the last known size
             if (ClientSize.Width == 0 || ClientSize.Height == 0)
             {
                 ClientSize = _SizeBeforeMinimize;
@@ -202,28 +216,41 @@ namespace Vocaluxe.Lib.Draw
 
                 if ((float)w / (float)h > CSettings.GetRenderAspect())
                 {
+                    //The windows's width is too big
                     w = (int)Math.Round((float)h * CSettings.GetRenderAspect());
                     x = (ClientSize.Width - w) / 2;
                 }
                 else
                 {
+                    //The windows's height is too big
                     h = (int)Math.Round((float)w / CSettings.GetRenderAspect());
                     y = (ClientSize.Height - h) / 2;
                 }
 
+                //Apply the new sizes to the PresentParameters
                 _PresentParameters.BackBufferWidth = ClientSize.Width;
                 _PresentParameters.BackBufferHeight = ClientSize.Height;
                 ClearScreen();
+                //To set new PresentParameters the device has to be resetted
                 Reset();
+                //All configurations got flushed due to Reset(), so apply them again
                 Init();
 
+                //Set the new Viewport
                 _Device.Viewport = new Viewport(x, y, w, h);
+                //Store size so it can get restored after the window gets minimized
                 _SizeBeforeMinimize = ClientSize;
             }
         }
 
+        /// <summary>
+        /// Triggers the Fullscreen mode
+        /// </summary>
         private void EnterFullScreen()
         {
+            //This currently not using real fullscreen mode but a borderless window
+            //Real fullscreen could be gained setting _PresentParameters.Windowed = true
+            //And calling Reset() and Init() after
             _OldSize = this.ClientSize;
             this.ClientSize = new Size(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
             this.FormBorderStyle = FormBorderStyle.None;
@@ -237,7 +264,9 @@ namespace Vocaluxe.Lib.Draw
 
             CConfig.SaveConfig();
         }
-
+        /// <summary>
+        /// Triggers the windowed mode
+        /// </summary>
         private void LeaveFullScreen()
         {
             this.ClientSize = _OldSize;
@@ -312,34 +341,45 @@ namespace Vocaluxe.Lib.Draw
 
         #region implementation
 
+        /// <summary>
+        /// Inits the Device
+        /// </summary>
+        /// <returns>True if it succeeded else false</returns>
         public bool Init()
         {
-            this.Text = CSettings.GetFullVersionText();
-            Matrix translate = Matrix.Translation(new Vector3(-CSettings.iRenderW / 2, CSettings.iRenderH / 2, 0));
-            Matrix projection = Matrix.OrthoOffCenterLH(-CSettings.iRenderW / 2, CSettings.iRenderW / 2, -CSettings.iRenderH / 2, CSettings.iRenderH / 2, CSettings.zNear, CSettings.zFar);
-            _VertexBuffer = new VertexBuffer(_Device, 4 * Marshal.SizeOf(typeof(TexturedColoredVertex)), Usage.WriteOnly | Usage.Dynamic, VertexFormat.Position | VertexFormat.Texture1 | VertexFormat.Diffuse, Pool.Default);
-            _Device.SetStreamSource(0, _VertexBuffer, 0, Marshal.SizeOf(typeof(TexturedColoredVertex)));
-            _Device.VertexDeclaration = TexturedColoredVertex.GetDeclaration(_Device);
-            _Device.SetTransform(TransformState.Projection, projection);
-            _Device.SetTransform(TransformState.World, translate);
-            _Device.SetRenderState(RenderState.CullMode, Cull.None);
-            _Device.SetRenderState(RenderState.AlphaBlendEnable, true);
-            _Device.SetRenderState(RenderState.Lighting, false);
-            _Device.SetRenderState(RenderState.DestinationBlend, Blend.InverseSourceAlpha);
-            _Device.SetRenderState(RenderState.SourceBlend, Blend.SourceAlpha);
-            if(_PresentParameters.Multisample != MultisampleType.None)
-                _Device.SetRenderState(RenderState.MultisampleAntialias, true);
-            _Device.SetSamplerState(0, SamplerState.MinFilter, TextureFilter.Linear);
-            _Device.SetSamplerState(0, SamplerState.MagFilter, TextureFilter.Linear);
-            _Device.SetSamplerState(0, SamplerState.MipFilter, TextureFilter.Linear);
-            _Device.SetSamplerState(0, SamplerState.AddressU, TextureAddress.Clamp);
-            _Device.SetSamplerState(0, SamplerState.AddressV, TextureAddress.Clamp);
-            _Device.SetTextureStageState(0, TextureStage.AlphaArg1, TextureArgument.Texture);
-            _Device.SetTextureStageState(0, TextureStage.AlphaArg2, TextureArgument.Diffuse);
-            _Device.SetTextureStageState(0, TextureStage.AlphaOperation, TextureOperation.Modulate);
-            return true;
+            if (!_Device.Disposed)
+            {
+                this.Text = CSettings.GetFullVersionText();
+                Matrix translate = Matrix.Translation(new Vector3(-CSettings.iRenderW / 2, CSettings.iRenderH / 2, 0));
+                Matrix projection = Matrix.OrthoOffCenterLH(-CSettings.iRenderW / 2, CSettings.iRenderW / 2, -CSettings.iRenderH / 2, CSettings.iRenderH / 2, CSettings.zNear, CSettings.zFar);
+                _VertexBuffer = new VertexBuffer(_Device, 4 * Marshal.SizeOf(typeof(TexturedColoredVertex)), Usage.WriteOnly | Usage.Dynamic, VertexFormat.Position | VertexFormat.Texture1 | VertexFormat.Diffuse, Pool.Default);
+                _Device.SetStreamSource(0, _VertexBuffer, 0, Marshal.SizeOf(typeof(TexturedColoredVertex)));
+                _Device.VertexDeclaration = TexturedColoredVertex.GetDeclaration(_Device);
+                _Device.SetTransform(TransformState.Projection, projection);
+                _Device.SetTransform(TransformState.World, translate);
+                _Device.SetRenderState(RenderState.CullMode, Cull.None);
+                _Device.SetRenderState(RenderState.AlphaBlendEnable, true);
+                _Device.SetRenderState(RenderState.Lighting, false);
+                _Device.SetRenderState(RenderState.DestinationBlend, Blend.InverseSourceAlpha);
+                _Device.SetRenderState(RenderState.SourceBlend, Blend.SourceAlpha);
+                if (_PresentParameters.Multisample != MultisampleType.None)
+                    _Device.SetRenderState(RenderState.MultisampleAntialias, true);
+                _Device.SetSamplerState(0, SamplerState.MinFilter, TextureFilter.Linear);
+                _Device.SetSamplerState(0, SamplerState.MagFilter, TextureFilter.Linear);
+                _Device.SetSamplerState(0, SamplerState.MipFilter, TextureFilter.Linear);
+                _Device.SetSamplerState(0, SamplerState.AddressU, TextureAddress.Clamp);
+                _Device.SetSamplerState(0, SamplerState.AddressV, TextureAddress.Clamp);
+                _Device.SetTextureStageState(0, TextureStage.AlphaArg1, TextureArgument.Texture);
+                _Device.SetTextureStageState(0, TextureStage.AlphaArg2, TextureArgument.Diffuse);
+                _Device.SetTextureStageState(0, TextureStage.AlphaOperation, TextureOperation.Modulate);
+                return true;
+            }
+            else
+                return false;
         }
-
+        /// <summary>
+        /// Starts the rendering
+        /// </summary>
         public void MainLoop()
         {
             _Run = true;
@@ -358,36 +398,45 @@ namespace Vocaluxe.Lib.Draw
 
                 if (_Run)
                 {
+                    //Clear the previous Frame
                     ClearScreen();
+                    //We want to begin drawing
                     _Device.BeginScene();
                     _Run = _Run && CGraphics.Draw();
-                    _Run = CGraphics.UpdateGameLogic(_Keys, _Mouse);
+                    //We finished drawing the frame
                     _Device.EndScene();
+                    _Run = CGraphics.UpdateGameLogic(_Keys, _Mouse);
                     try
                     {
+                        //Now push the frame to the Viewport
                         _Device.Present();
                     }
                     catch (Direct3D9Exception)
                     {
-                        if (_Device.TestCooperativeLevel() == ResultCode.DeviceNotReset) //Do only reset when the device in a resetable state!
+                        //In Direct3D devices can get lost. 
+                        //This happens for example when opening the Task Manager in Vista/Windows 7 or if a UAC message is opening
+                        //We need to reset the device to get it to workable state again
+                        //After a reset Init() needs to be called because all data in the Direct3D default pool are lost and need to be recreated
+                        if (_Device.TestCooperativeLevel() == ResultCode.DeviceNotReset)
                         {
                             Reset();
                             Init();
                         }
                     }
+                    //Apply fullscreen mode
                     if ((CSettings.bFullScreen && !_fullscreen) || (!CSettings.bFullScreen && _fullscreen))
                     {
                         if (!_fullscreen)
                             EnterFullScreen();
                         else
-                            LeaveFullScreen();                        
+                            LeaveFullScreen();
                     }
                     if (CTime.IsRunning())
                         delay = (int)Math.Floor(CConfig.CalcCycleTime() - CTime.GetMilliseconds());
 
                     if (delay >= 1)
                         System.Threading.Thread.Sleep(delay);
-
+                    //Calculate the FPS Rate and restart the timer after a frame
                     CTime.CalculateFPS();
                     CTime.Restart();
                 }
@@ -396,19 +445,27 @@ namespace Vocaluxe.Lib.Draw
             }
         }
 
+        /// <summary>
+        /// Resets the device, all objects in the Direct3D default pool get flushed and need to be recreated
+        /// </summary>
         public void Reset()
         {
+            //Dispose all objects in the default pool, those need to be recreated
             TexturedColoredVertex.GetDeclaration(_Device).Dispose();
             _VertexBuffer.Dispose();
             _Device.Reset(_PresentParameters);
         }
 
+        /// <summary>
+        /// Unloads all Textures and other objects used by Direct3D for rendering
+        /// </summary>
+        /// <returns></returns>
         public bool Unload()
         {
+            //Dispose all textures
             for (int i = 0; i < _D3DTextures.Count; i++)
             {
                 _D3DTextures[i].Dispose();
-
             }
             TexturedColoredVertex.GetDeclaration(_Device).Dispose();
             _VertexBuffer.Dispose();
@@ -417,21 +474,40 @@ namespace Vocaluxe.Lib.Draw
             return true;
         }
 
+        /// <summary>
+        /// Gets the current viewport width
+        /// </summary>
+        /// <returns>The current viewport width</returns>
         public int GetScreenWidth()
         {
             return _Device.Viewport.Width;
         }
 
+        /// <summary>
+        /// Gets the current viewport height
+        /// </summary>
+        /// <returns>The current viewport height</returns>
         public int GetScreenHeight()
         {
             return _Device.Viewport.Height;
         }
 
+        /// <summary>
+        /// Calculates the bounds for a CText object
+        /// </summary>
+        /// <param name="text">The CText object of which the bounds should be calculated for</param>
+        /// <returns>RectangleF object containing the bounds</returns>
         public RectangleF GetTextBounds(CText text)
         {
             return GetTextBounds(text, text.Height);
         }
 
+        /// <summary>
+        /// Calculates the bounds for a CText object
+        /// </summary>
+        /// <param name="text">The CText object of which the bounds should be calculated for</param>
+        /// <param name="Height">The height of the CText object</param>
+        /// <returns>RectangleF object containing the bounds</returns>
         public RectangleF GetTextBounds(CText text, float Height)
         {
             CFonts.Height = Height;
@@ -442,21 +518,38 @@ namespace Vocaluxe.Lib.Draw
 
         #region Basic Draw Methods
 
+        /// <summary>
+        /// Removes all textures from the screen
+        /// </summary>
         public void ClearScreen()
         {
             _Device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.Black, 1.0f, 0);
         }
+
+        /// <summary>
+        /// Not implemented yet
+        /// </summary>
+        /// <returns></returns>
         public STexture CopyScreen()
         {
+            //FIXME
             STexture texture = new STexture(-1);
             return texture;
         }
 
+        /// <summary>
+        /// Not implemented yet
+        /// </summary>
+        /// <returns></returns>
         public void CopyScreen(ref STexture Texture)
         {
+            //FIXME
             return;
         }
 
+        /// <summary>
+        /// Creates a Screenshot of the current frame
+        /// </summary>
         public void MakeScreenShot()
         {
             string file = "Screenshot_";
@@ -466,6 +559,7 @@ namespace Vocaluxe.Lib.Draw
             while (File.Exists(Path.Combine(path, file + i.ToString("00000") + ".bmp")))
                 i++;
 
+            //create a surface of the frame
             using (Surface surface = _Device.GetBackBuffer(0, 0))
             {
                 Bitmap screen = new Bitmap(Surface.ToStream(surface, ImageFileFormat.Bmp));
@@ -476,22 +570,54 @@ namespace Vocaluxe.Lib.Draw
             _Mouse.Visible = true;
         }
 
+        /// <summary>
+        /// Draws a line
+        /// </summary>
+        /// <param name="a">The alpha value from 0-255</param>
+        /// <param name="r">The red value from 0-255</param>
+        /// <param name="g">The red value from 0-255</param>
+        /// <param name="b">The red value from 0-255</param>
+        /// <param name="w">The width of the line</param>
+        /// <param name="x1">The start x-value</param>
+        /// <param name="y1">The start y-value</param>
+        /// <param name="x2">The end x-value</param>
+        /// <param name="y2">The end y-value</param>
         public void DrawLine(int a, int r, int g, int b, int w, int x1, int y1, int x2, int y2)
         {
             SColorF color = new SColorF(a / 255, g / 255, b / 255, a / 255);
             DrawTexture(blankTexture, new SRectF(x1, y1, x2, y2, 1), color);
         }
 
+        /// <summary>
+        /// Draws a text string
+        /// </summary>
+        /// <param name="Text">The text to be drawn</param>
+        /// <param name="x">The text's x-position</param>
+        /// <param name="y">The text's y-position</param>
+        /// <param name="h">The text's height</param>
         public void DrawText(string Text, int x, int y, int h)
         {
             DrawText(Text, x, y, h, 0f);
         }
 
+        /// <summary>
+        /// Draws a text string
+        /// </summary>
+        /// <param name="Text">The text to be drawn</param>
+        /// <param name="x">The text's x-position</param>
+        /// <param name="y">The text's y-position</param>
+        /// <param name="h">The text's height</param>
+        /// <param name="z">The text's x-position</param>
         public void DrawText(string Text, int x, int y, float h, float z)
         {
             CFonts.DrawText(Text, h, x, y, z, new SColorF(1f, 1f, 1f, 1f));
         }
 
+        /// <summary>
+        /// Draws a colored rectangle 
+        /// </summary>
+        /// <param name="color">The color in which the rectangle will be drawn in</param>
+        /// <param name="rect">The coordinates in a SRectF struct</param>
         public void DrawColor(SColorF color, SRectF rect)
         {
             DrawTexture(blankTexture, rect, color);
@@ -499,6 +625,11 @@ namespace Vocaluxe.Lib.Draw
         #endregion Basic Draw Methods
         #region Textures
 
+        /// <summary>
+        /// Adds a texture and stores it in the VRam
+        /// </summary>
+        /// <param name="TexturePath">The texture's filepath</param>
+        /// <returns>A STexture object containing the added texture</returns>
         public STexture AddTexture(string TexturePath)
         {
             if (System.IO.File.Exists(TexturePath))
@@ -519,18 +650,30 @@ namespace Vocaluxe.Lib.Draw
             return new STexture(-1);
         }
 
+        /// <summary>
+        /// Calculates the next power of two
+        /// </summary>
+        /// <param name="n">The value of which the next power of two will be calculated</param>
+        /// <returns>The next power of two</returns>
         private static float NextPowerOfTwo(float n)
         {
             if (n < 0) throw new ArgumentOutOfRangeException("n", "Must be positive.");
             return (float)System.Math.Pow(2, System.Math.Ceiling(System.Math.Log((double)n, 2)));
         }
 
+        /// <summary>
+        /// Adds a texture and stores it in the Vram
+        /// </summary>
+        /// <param name="bmp">The Bitmap of which the texute will be created from</param>
+        /// <param name="TexturePath">The path to the texture</param>
+        /// <returns>A STexture object containing the added texture</returns>
         public STexture AddTexture(Bitmap bmp, string TexturePath)
         {
             STexture texture = new STexture(-1);
             if (bmp.Height == 0 || bmp.Width == 0)
                 return texture;
             int MaxSize;
+            //Apply the right max size
             switch (CConfig.TextureQuality)
             {
                 case ETextureQuality.TR_CONFIG_TEXTURE_LOWEST:
@@ -571,10 +714,13 @@ namespace Vocaluxe.Lib.Draw
             texture.width = w;
             texture.height = h;
 
+            //Older graphics card can only handle textures with sizes being powers of two
             texture.w2 = (float)NextPowerOfTwo(w);
             texture.h2 = (float)NextPowerOfTwo(h);
 
+            //Create a new Bitmap with the new sizes
             Bitmap bmp2 = new Bitmap((int)texture.w2, (int)texture.h2);
+            //Scale the texture
             Graphics g = Graphics.FromImage(bmp2);
             g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
             g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
@@ -583,13 +729,17 @@ namespace Vocaluxe.Lib.Draw
 
             texture.width_ratio = 1f;
             texture.height_ratio = 1f;
-            
+
+            //Fill the new Bitmap with the texture data
             BitmapData bmp_data = bmp2.LockBits(new Rectangle(0, 0, bmp2.Width, bmp2.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
             byte[] Data = new byte[4 * bmp2.Width * bmp2.Height];
             Marshal.Copy(bmp_data.Scan0, Data, 0, Data.Length);
             bmp2.UnlockBits(bmp_data);
-            
+
+            //Create a new texture in the managed pool, which does not need to be recreated on a lost device
+            //because a copy of the texture is hold in the Ram
             Texture t = new Texture(_Device, (int)texture.w2, (int)texture.h2, 0, Usage.AutoGenerateMipMap, Format.A8R8G8B8, Pool.Managed);
+            //Lock the texture and fill it with the data
             DataRectangle rect = t.LockRectangle(0, LockFlags.None);
             for (int i = 0; i < Data.Length; )
             {
@@ -609,10 +759,15 @@ namespace Vocaluxe.Lib.Draw
             texture.rect = new SRectF(0f, 0f, texture.width, texture.height, 0f);
             texture.TexturePath = String.Empty;
             _Textures.Add(texture);
-            
+
             return texture;
         }
 
+        /// <summary>
+        /// Adds a texture and stores it in the Vram
+        /// </summary>
+        /// <param name="bmp">The Bitmap of which the texute will be created from</param>
+        /// <returns>A STexture object containing the added texture</returns>
         public STexture AddTexture(Bitmap bmp)
         {
             return AddTexture(bmp, String.Empty);
@@ -622,7 +777,7 @@ namespace Vocaluxe.Lib.Draw
         {
             byte[] PointerData = new Byte[4 * W * H];
             Marshal.Copy(Data, PointerData, 0, PointerData.Length);
-            return AddTexture(W, H , ref PointerData);
+            return AddTexture(W, H, ref PointerData);
         }
 
         public STexture AddTexture(int W, int H, ref byte[] Data)
@@ -655,6 +810,12 @@ namespace Vocaluxe.Lib.Draw
             return texture;
         }
 
+        /// <summary>
+        /// Updates the data of a texture
+        /// </summary>
+        /// <param name="Texture">The texture to update</param>
+        /// <param name="Data">A Pointer containing the data of which the texture should be updated</param>
+        /// <returns>True if succeeded</returns>
         public bool UpdateTexture(ref STexture Texture, IntPtr Data)
         {
             byte[] PointerData = new Byte[4 * (int)Texture.width * (int)Texture.height];
@@ -663,6 +824,12 @@ namespace Vocaluxe.Lib.Draw
             return UpdateTexture(ref Texture, ref PointerData);
         }
 
+        /// <summary>
+        /// Updates the data of a texture
+        /// </summary>
+        /// <param name="Texture">The texture to update</param>
+        /// <param name="Data">A byte array containing the new texture's data</param>
+        /// <returns>True if succeeded</returns>
         public bool UpdateTexture(ref STexture Texture, ref byte[] Data)
         {
             if ((Texture.index >= 0) && (_Textures.Count > 0) && (_D3DTextures.Count > Texture.index))
@@ -679,10 +846,17 @@ namespace Vocaluxe.Lib.Draw
 
                 Texture.height_ratio = Texture.height / NextPowerOfTwo(Texture.height);
                 Texture.width_ratio = Texture.width / NextPowerOfTwo(Texture.width);
+                return true;
             }
-            return true;
+            else
+                return false;
         }
 
+        /// <summary>
+        /// Checks if a texture exists
+        /// </summary>
+        /// <param name="Texture">The texture to check</param>
+        /// <returns>True if the texture exists</returns>
         private bool _TextureExists(STexture Texture)
         {
             if ((Texture.index > 0) && (_Textures.Count > 0))
@@ -698,17 +872,22 @@ namespace Vocaluxe.Lib.Draw
             return false;
         }
 
+        /// <summary>
+        /// Removes a texture from the Vram
+        /// </summary>
+        /// <param name="Texture">The texture to be removed</param>
         public void RemoveTexture(ref STexture Texture)
         {
             if ((Texture.index >= 0) && (_Textures.Count > 0))
             {
                 for (int i = 0; i < _Textures.Count; i++)
                 {
-                    if (_Textures[i].index == Texture.index)  
+                    if (_Textures[i].index == Texture.index)
                     {
                         _D3DTextures[Texture.index].Dispose();
                         _Textures.RemoveAt(i);
                         Texture.index = -1;
+                        //Calling the garbage collector to get rid of all unused objects
                         GC.Collect();
                         break;
                     }
@@ -716,40 +895,78 @@ namespace Vocaluxe.Lib.Draw
             }
         }
 
+        /// <summary>
+        /// Draws a texture
+        /// </summary>
+        /// <param name="Texture">The texture to be drawn</param>
         public void DrawTexture(STexture Texture)
         {
             if ((Texture.index >= 0) && (_Textures.Count > 0) && (_D3DTextures.Count > Texture.index))
                 DrawTexture(Texture, Texture.rect, Texture.color);
         }
 
+        /// <summary>
+        /// Draws a texture
+        /// </summary>
+        /// <param name="Texture">The texture to be drawn</param>
+        /// <param name="rect">A SRectF struct containing the destination coordinates</param>
         public void DrawTexture(STexture Texture, SRectF rect)
         {
             if ((Texture.index >= 0) && (_Textures.Count > 0) && (_D3DTextures.Count > Texture.index))
                 DrawTexture(Texture, rect, Texture.color, false);
         }
 
+        /// <summary>
+        /// Draws a texture
+        /// </summary>
+        /// <param name="Texture">The texture to be drawn</param>
+        /// <param name="rect">A SRectF struct containing the destination coordinates</param>
+        /// <param name="color">A SColorF struct containing a color which the texture will be colored in</param>
         public void DrawTexture(STexture Texture, SRectF rect, SColorF color)
         {
             if ((Texture.index >= 0) && (_Textures.Count > 0) && (_D3DTextures.Count > Texture.index))
                 DrawTexture(Texture, rect, color, false);
         }
 
+        /// <summary>
+        /// Draws a texture
+        /// </summary>
+        /// <param name="Texture">The texture to be drawn</param>
+        /// <param name="rect">A SRectF struct containing the destination coordinates</param>
+        /// <param name="color">A SColorF struct containing a color which the texture will be colored in</param>
+        /// <param name="bounds">A SRectF struct containing which part of the texture should be drawn</param>
         public void DrawTexture(STexture Texture, SRectF rect, SColorF color, SRectF bounds)
         {
             if ((Texture.index >= 0) && (_Textures.Count > 0) && (_D3DTextures.Count > Texture.index))
                 DrawTexture(Texture, rect, color, bounds, false);
         }
 
+        /// <summary>
+        /// Draws a texture
+        /// </summary>
+        /// <param name="Texture">The texture to be drawn</param>
+        /// <param name="rect">A SRectF struct containing the destination coordinates</param>
+        /// <param name="color">A SColorF struct containing a color which the texture will be colored in</param>
+        /// <param name="mirrored">True if the texture should be mirrored</param>
         public void DrawTexture(STexture Texture, SRectF rect, SColorF color, bool mirrored)
         {
             if ((Texture.index >= 0) && (_Textures.Count > 0) && (_D3DTextures.Count > Texture.index))
                 DrawTexture(Texture, rect, color, new SRectF(0, 0, CSettings.iRenderW, CSettings.iRenderH, rect.Z), mirrored);
         }
 
+        /// <summary>
+        /// Draws a texture
+        /// </summary>
+        /// <param name="Texture">The texture to be drawn</param>
+        /// <param name="rect">A SRectF struct containing the destination coordinates</param>
+        /// <param name="color">A SColorF struct containing a color which the texture will be colored in</param>
+        /// <param name="bounds">A SRectF struct containing which part of the texture should be drawn</param>
+        /// <param name="mirrored">True if the texture should be mirrored</param>
         public void DrawTexture(STexture Texture, SRectF rect, SColorF color, SRectF bounds, bool mirrored)
         {
             if ((Texture.index >= 0) && (_Textures.Count > 0) && (_D3DTextures.Count > Texture.index))
             {
+                //Calculate the position
                 float x1 = (bounds.X - rect.X) / rect.W * Texture.width_ratio;
                 float x2 = (bounds.X + bounds.W - rect.X) / rect.W * Texture.width_ratio;
                 float y1 = (bounds.Y - rect.Y) / rect.H * Texture.height_ratio;
@@ -767,6 +984,7 @@ namespace Vocaluxe.Lib.Draw
                 if (y2 > Texture.height_ratio)
                     y2 = Texture.height_ratio;
 
+                //Calculate the size
                 float rx1 = rect.X;
                 float rx2 = rect.X + rect.W;
                 float ry1 = rect.Y;
@@ -784,7 +1002,8 @@ namespace Vocaluxe.Lib.Draw
                 if (ry2 > bounds.Y + bounds.H)
                     ry2 = bounds.Y + bounds.H;
 
-                rx1 -= 0.5f; // Align pixels
+                //Align the pixels because Direct3D expects the pixels to be the left top corner
+                rx1 -= 0.5f;
                 ry1 -= 0.5f;
                 rx2 -= 0.5f;
                 ry2 -= 0.5f;
@@ -796,6 +1015,8 @@ namespace Vocaluxe.Lib.Draw
                 if (color.G >= 1f)
                     color.G = 1f;
 
+                //Apply rotation
+                //FIXME: Rotated textures get distorted when they hit the border of the window
                 if (rect.Rotation != 0)
                 {
                     rect.Rotation = rect.Rotation * (float)Math.PI / 180;
@@ -807,12 +1028,18 @@ namespace Vocaluxe.Lib.Draw
                     Matrix rotation = Matrix.RotationZ(-rect.Rotation);
                     Matrix translationB = Matrix.Translation(centerX, centerY, 0);
 
+                    //Multiplicate the matrices to get the real world matrix,
+                    //First shift the texture into the center
+                    //Rotate it and shift it back to the origin position
+                    //Apply the originTranslation after
                     Matrix result = translationA * rotation * translationB * originTranslation;
 
                     _Device.SetTransform(TransformState.World, result);
                 }
 
                 Color c = Color.FromArgb((int)(color.A * 255 * CGraphics.GlobalAlpha), (int)(color.R * 255), (int)(color.G * 255), (int)(color.B * 255));
+
+                //Create new vertices and write them into a vertexbuffer
                 DataStream stream = _VertexBuffer.Lock(0, 0, LockFlags.Discard);
                 if (!mirrored)
                 {
@@ -834,9 +1061,12 @@ namespace Vocaluxe.Lib.Draw
                 }
                 _VertexBuffer.Unlock();
                 stream.Dispose();
+                //Set the texture
                 _Device.SetTexture(0, _D3DTextures[Texture.index]);
+                //Draw 2 triangles to build a quad
                 _Device.DrawPrimitives(PrimitiveType.TriangleFan, 0, 2);
 
+                //Reapply old matrices if the texture was rotated
                 if (rect.Rotation != 0)
                 {
                     Matrix originTranslation = Matrix.Translation(new Vector3(-CSettings.iRenderW / 2, CSettings.iRenderH / 2, 0));
@@ -845,38 +1075,89 @@ namespace Vocaluxe.Lib.Draw
             }
         }
 
+        /// <summary>
+        /// Draws a texture
+        /// </summary>
+        /// <param name="Texture">The texture to be drawn</param>
+        /// <param name="rect">A SRectF struct containing the destination coordinates</param>
+        /// <param name="color">A SColorF struct containing a color which the texture will be colored in</param>
+        /// <param name="begin">A Value ranging from 0 to 1 containing the beginning of the texture</param>
+        /// <param name="end">A Value ranging from 0 to 1 containing the ending of the texture</param>
+
         public void DrawTexture(STexture Texture, SRectF rect, SColorF color, float begin, float end)
         {
-
             float x1 = 0f + begin * Texture.width_ratio;
             float x2 = Texture.width_ratio * end;
             float y1 = 0f;
             float y2 = Texture.height_ratio;
 
-            float rx1 = rect.X + begin* rect.W;
+            float rx1 = rect.X + begin * rect.W;
             float rx2 = rect.X + end * rect.W;
             float ry1 = rect.Y;
             float ry2 = rect.Y + rect.H;
 
-            rx1 -= 0.5f; // Align pixels
+            //Align the pixels because Direct3D expects the pixels to be the left top corner
+            rx1 -= 0.5f;
             ry1 -= 0.5f;
             rx2 -= 0.5f;
             ry2 -= 0.5f;
 
             Color c = Color.FromArgb((int)(color.A * 255 * CGraphics.GlobalAlpha), (int)(color.R * 255), (int)(color.G * 255), (int)(color.B * 255));
+
+            //Apply rotation
+            //FIXME: Rotated textures get distorted when they hit the border of the window
+            if (rect.Rotation != 0)
+            {
+                rect.Rotation = rect.Rotation * (float)Math.PI / 180;
+                float centerX = (rx1 + rx2) / 2f;
+                float centerY = -(ry1 + ry2) / 2f;
+
+                Matrix originTranslation = _Device.GetTransform(TransformState.World);
+                Matrix translationA = Matrix.Translation(-centerX, -centerY, 0);
+                Matrix rotation = Matrix.RotationZ(-rect.Rotation);
+                Matrix translationB = Matrix.Translation(centerX, centerY, 0);
+
+                //Multiplicate the matrices to get the real world matrix,
+                //First shift the texture into the center
+                //Rotate it and shift it back to the origin position
+                //Apply the originTranslation after
+                Matrix result = translationA * rotation * translationB * originTranslation;
+
+                _Device.SetTransform(TransformState.World, result);
+            }
+
+            //Create new vertices and write them into a vertexbuffer
             DataStream stream = _VertexBuffer.Lock(0, 0, LockFlags.Discard);
             stream.WriteRange(new[] {
-	                    new TexturedColoredVertex(new Vector3(rx1, ry1*-1f, rect.Z + CGraphics.ZOffset), new Vector2(x1, y1), c.ToArgb()),
-	                    new TexturedColoredVertex(new Vector3(rx1, ry2*-1f, rect.Z + CGraphics.ZOffset), new Vector2(x1, y2), c.ToArgb()),
-	                    new TexturedColoredVertex(new Vector3(rx2, ry2*-1f, rect.Z + CGraphics.ZOffset), new Vector2(x2, y2), c.ToArgb()),
-                        new TexturedColoredVertex(new Vector3(rx2, ry1*-1f, rect.Z + CGraphics.ZOffset), new Vector2(x2, y1), c.ToArgb()),
+	                    new TexturedColoredVertex(new Vector3(rx1, -ry1, rect.Z + CGraphics.ZOffset), new Vector2(x1, y1), c.ToArgb()),
+	                    new TexturedColoredVertex(new Vector3(rx1, -ry2, rect.Z + CGraphics.ZOffset), new Vector2(x1, y2), c.ToArgb()),
+	                    new TexturedColoredVertex(new Vector3(rx2, -ry2, rect.Z + CGraphics.ZOffset), new Vector2(x2, y2), c.ToArgb()),
+                        new TexturedColoredVertex(new Vector3(rx2, -ry1, rect.Z + CGraphics.ZOffset), new Vector2(x2, y1), c.ToArgb()),
 	                });
             _VertexBuffer.Unlock();
             stream.Dispose();
+            //Set the texture
             _Device.SetTexture(0, _D3DTextures[Texture.index]);
+            //Draw 2 triangles to build a quad
             _Device.DrawPrimitives(PrimitiveType.TriangleFan, 0, 2);
+
+            //Reapply old matrices if the texture was rotated
+            if (rect.Rotation != 0)
+            {
+                Matrix originTranslation = Matrix.Translation(new Vector3(-CSettings.iRenderW / 2, CSettings.iRenderH / 2, 0));
+                _Device.SetTransform(TransformState.World, originTranslation);
+            }
         }
 
+        /// <summary>
+        /// Draws a reflection of a texture
+        /// </summary>
+        /// <param name="Texture">The texture of which a reflection should be drawn</param>
+        /// <param name="rect">A SRectF struct containing the destination coordinates</param>
+        /// <param name="color">A SColorF struct containing a color which the texture will be colored in</param>
+        /// <param name="bounds">A SRectF struct containing which part of the texture should be drawn</param>
+        /// <param name="space">The space between the texture and the reflection</param>
+        /// <param name="height">The height of the reflection</param>
         public void DrawTextureReflection(STexture Texture, SRectF rect, SColorF color, SRectF bounds, float space, float height)
         {
             if (rect.W == 0f || rect.H == 0f || bounds.H == 0f || bounds.W == 0f || color.A == 0f || height <= 0f)
@@ -928,29 +1209,65 @@ namespace Vocaluxe.Lib.Draw
                 if (ry2 > bounds.Y + bounds.H + space + height)
                     ry2 = bounds.Y + bounds.H + space + height;
 
-                rx1 -= 0.5f; // Align pixels
+                //Align the pixels because Direct3D expects the pixels to be the left top corner
+                rx1 -= 0.5f;
                 ry1 -= 0.5f;
                 rx2 -= 0.5f;
                 ry2 -= 0.5f;
 
-                DataStream stream = _VertexBuffer.Lock(0, 0, LockFlags.Discard);
+                //Apply rotation
+                //FIXME: Rotated textures get distorted when they hit the border of the window
+                if (rect.Rotation != 0)
+                {
+                    rect.Rotation = rect.Rotation * (float)Math.PI / 180;
+                    float centerX = (rx1 + rx2) / 2f;
+                    float centerY = -(ry1 + ry2) / 2f;
+
+                    Matrix originTranslation = _Device.GetTransform(TransformState.World);
+                    Matrix translationA = Matrix.Translation(-centerX, -centerY, 0);
+                    Matrix rotation = Matrix.RotationZ(-rect.Rotation);
+                    Matrix translationB = Matrix.Translation(centerX, centerY, 0);
+
+                    //Multiplicate the matrices to get the real world matrix,
+                    //First shift the texture into the center
+                    //Rotate it and shift it back to the origin position
+                    //Apply the originTranslation after
+                    Matrix result = translationA * rotation * translationB * originTranslation;
+
+                    _Device.SetTransform(TransformState.World, result);
+                }
 
                 Color c = Color.FromArgb((int)(color.A * 255 * CGraphics.GlobalAlpha), (int)(color.R * 255), (int)(color.G * 255), (int)(color.B * 255));
-                Color t = Color.FromArgb(0, (int)(color.R * 255), (int)(color.G * 255), (int)(color.B * 255));
+                Color transparent = Color.FromArgb(0, (int)(color.R * 255), (int)(color.G * 255), (int)(color.B * 255));
 
+                //Create new vertices and write them into a vertexbuffer
+                DataStream stream = _VertexBuffer.Lock(0, 0, LockFlags.Discard);
                 stream.WriteRange(new[] {
                     new TexturedColoredVertex(new Vector3(rx2, -ry1, rect.Z + CGraphics.ZOffset), new Vector2(x2, y2), c.ToArgb()),
-	                new TexturedColoredVertex(new Vector3(rx2, -ry2, rect.Z + CGraphics.ZOffset), new Vector2(x2, y1), t.ToArgb()),
-	                new TexturedColoredVertex(new Vector3(rx1, -ry2, rect.Z + CGraphics.ZOffset), new Vector2(x1, y1), t.ToArgb()),
+	                new TexturedColoredVertex(new Vector3(rx2, -ry2, rect.Z + CGraphics.ZOffset), new Vector2(x2, y1), transparent.ToArgb()),
+	                new TexturedColoredVertex(new Vector3(rx1, -ry2, rect.Z + CGraphics.ZOffset), new Vector2(x1, y1), transparent.ToArgb()),
                     new TexturedColoredVertex(new Vector3(rx1, -ry1, rect.Z + CGraphics.ZOffset), new Vector2(x1, y2), c.ToArgb()),
 	            });
                 _VertexBuffer.Unlock();
                 stream.Dispose();
+                //Set the texture
                 _Device.SetTexture(0, _D3DTextures[Texture.index]);
+                //Draw 2 triangles to build a quad
                 _Device.DrawPrimitives(PrimitiveType.TriangleFan, 0, 2);
+
+                //Reapply old matrices if the texture was rotated
+                if (rect.Rotation != 0)
+                {
+                    Matrix originTranslation = Matrix.Translation(new Vector3(-CSettings.iRenderW / 2, CSettings.iRenderH / 2, 0));
+                    _Device.SetTransform(TransformState.World, originTranslation);
+                }
             }
         }
 
+        /// <summary>
+        /// Gets the count of current textures
+        /// </summary>
+        /// <returns>The amount of textures</returns>
         public int TextureCount()
         {
             return _Textures.Count;
@@ -963,12 +1280,12 @@ namespace Vocaluxe.Lib.Draw
         {
             private static VertexDeclaration sDeclaration;
             public static VertexElement[] Elements =
-        {
-            new VertexElement(0, 0, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Position, 0),
-            new VertexElement(0, sizeof(float) *3, DeclarationType.Float2, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 0),
-            new VertexElement(0, sizeof(float) * 3 + sizeof(float)*2, DeclarationType.Color, DeclarationMethod.Default, DeclarationUsage.Color, 0),
-            VertexElement.VertexDeclarationEnd
-        };
+            {
+                new VertexElement(0, 0, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Position, 0),
+                new VertexElement(0, sizeof(float) *3, DeclarationType.Float2, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 0),
+                new VertexElement(0, sizeof(float) * 3 + sizeof(float)*2, DeclarationType.Color, DeclarationMethod.Default, DeclarationUsage.Color, 0),
+                VertexElement.VertexDeclarationEnd
+            };
 
             public Vector3 Position;
             public Vector2 Texture;