iluFlipImage導致圖形問題

Question

我現在讀了一本書。它關於OpenGl。有一個例子來加載與魔鬼紋理。 我已經實現了書1：1中的代碼。但iluFlipImage函數會導致圖形問題。 林使用.NET Framework 4.0 TOA框架2.1

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翻轉

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不翻轉

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public void LoadTexture(string textureName, string path) 
    { 
     int devIlId; 
     Il.ilGenImages(1, out devIlId); 
     Gl.glBindTexture(Gl.GL_TEXTURE_2D, devIlId); 

     if (!Il.ilLoadImage(path)) 
     { 
      System.Diagnostics.Debug.Assert(false, 
      "Could not open file, [" + path + "]."); 
     } 

     Ilu.iluFlipImage(); 

     var width = Il.ilGetInteger(Il.IL_IMAGE_WIDTH); 
     var height = Il.ilGetInteger(Il.IL_IMAGE_HEIGHT); 
     var textureId = Ilut.ilutGLBindTexImage(); 

     System.Diagnostics.Debug.Assert(textureId != 0); 
     Il.ilDeleteImages(1, ref devIlId); 
     _textureStorage.Add(textureName, new Texture(textureId, path, width, height)); 
    } 

Answer 1

public void LoadTexture(string name, string path) 
    { 
     var bitmap = new Bitmap(path); 
     var bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), 
             ImageLockMode.ReadOnly, PixelFormat.Format32bppRgb); 
     int textureId; 
     Gl.glGenTextures(1, out textureId); 
     Gl.glBindTexture(Gl.GL_TEXTURE_2D, textureId); 
     Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA8, bitmap.Width, bitmap.Height, 0, Gl.GL_BGRA, Gl.GL_UNSIGNED_BYTE, bitmapData.Scan0); 
     Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR); 
     Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR); 
     _textureStorage.Add(name, new Texture(textureId, path, bitmap.Width, bitmap.Height)); 

     bitmap.UnlockBits(bitmapData); 
     bitmap.Dispose(); 
    }