#define TGA_HEADER_SIZE
();
#define TGA_CMAP_SIZE
( tga);
#define TGA_CMAP_OFF
( tga);
#define TGA_IMG_DATA_SIZE
( tga);
#define TGA_IMG_DATA_OFF
( tga);
#define TGA_SCANLINE_SIZE
( tga);
#define TGA_ERROR
( tga, code);
is defined as 18
returns the total length of the color map in bytes
returns the start offset of the color map data
returns the total length of the image data in bytes
returns the start offset of the image data
returns the length of a single scanline in bytes
see Chapter 4