R16.bt

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local float height, width;

struct {
  UINT16 Height <name="Height">; 
  UINT16 Width <name="Width">;  
  UBYTE MM; 
  UBYTE MN; 
  UBYTE MN; 
  UBYTE MN; 
  UINT16 Depth;
  UBYTE UI; 
  UINT16 UI; 
  UINT16 TilesCount <name="Tiles">; 
  UINT16 UI; 
  UINT16 TilesCount <name="Tiles">; 
  UINT16 UI;

  UINT16 H <name="Tile height">; 
  UINT16 W <name="Tile width">;  
  UINT DataSize <name="Data size">; 
} HEADER;

BitfieldDisablePadding(); 

typedef struct {
    ubyte Blue  : 5 <name="Blue">;
    ubyte Green : 5 <name="Green">;
    ubyte Red   : 5 <name="Red">;
    ubyte Alpha : 1 <name="Blue">;
} PIXEL <name="Pixel">;  

struct {
  height = HEADER.Height;
  width = HEADER.Width;
  Printf("%d", height * width);
  PIXEL PixelArray[height * width] <optimize=false>;
} PIXEL_DATA <name="Pixel data">;
 

  struct {
    local int height = HEADER.Height, width = HEADER.Width, i;
  } variables <hidden=true>;
  if (HEADER.MM > 0) {
    while (variables.height >= 1 || variables.width >= 1)
      {
        variables.height = variables.height/2; 
         variables.width = variables.width/2;
    
         struct {
           PIXEL MipMapArray[variables.height*variables.width] <optimize=false>;      
         } MM <name="Mip Map">;
      };
  };