从bmp图片中读取数据

bool LoadTexture(LPTSTR szFileName, GLuint &texid) // Creates Texture From A Bitmap File
{
 HBITMAP hBMP; // Handle Of The Bitmap
 BITMAP BMP; // Bitmap Structure
 
 glGenTextures(1, &texid); // Create The Texture
 hBMP=(HBITMAP)LoadImage(GetModuleHandle(NULL), szFileName, IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE );
 
 if (!hBMP) // Does The Bitmap Exist?
  return FALSE; // If Not Return False
 
 GetObject(hBMP, sizeof(BMP), &BMP); // Get The Object
 // hBMP: Handle To Graphics Object
 // sizeof(BMP): Size Of Buffer For Object Information
 // &BMP: Buffer For Object Information
 
 glPixelStorei(GL_UNPACK_ALIGNMENT, 4); // Pixel Storage Mode (Word Alignment / 4 Bytes)
 
 // Typical Texture Generation Using Data From The Bitmap
 glBindTexture(GL_TEXTURE_2D, texid); // Bind To The Texture ID
 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); // Linear Min Filter
 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // Linear Mag Filter
 glTexImage2D(GL_TEXTURE_2D, 0, 3, BMP.bmWidth, BMP.bmHeight, 0, GL_BGR_EXT, GL_UNSIGNED_BYTE, BMP.bmBits);
 
 DeleteObject(hBMP); // Delete The Object
 
 return TRUE; // Loading Was Successful
}