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/** Color channels.
Constants used in color manipulation routines.
*/
FI_ENUM(FREE_IMAGE_COLOR_CHANNEL) {
	FICC_RGB	= 0,	//! Use red, green and blue channels
	FICC_RED	= 1,	//! Use red channel
	FICC_GREEN	= 2,	//! Use green channel
	FICC_BLUE	= 3,	//! Use blue channel
	FICC_ALPHA	= 4,	//! Use alpha channel
	FICC_BLACK	= 5,	//! Use black channel
	FICC_REAL	= 6,	//! Complex images: use real part
	FICC_IMAG	= 7,	//! Complex images: use imaginary part
	FICC_MAG	= 8,	//! Complex images: use magnitude
	FICC_PHASE	= 9		//! Complex images: use phase
};

// Metadata support ---------------------------------------------------------

/**
  Tag data type information (based on TIFF specifications)

  Note: RATIONALs are the ratio of two 32-bit integer values.
*/
FI_ENUM(FREE_IMAGE_MDTYPE) {
	FIDT_NOTYPE		= 0,	//! placeholder 
	FIDT_BYTE		= 1,	//! 8-bit unsigned integer 
	FIDT_ASCII		= 2,	//! 8-bit bytes w/ last byte null 
	FIDT_SHORT		= 3,	//! 16-bit unsigned integer 
	FIDT_LONG		= 4,	//! 32-bit unsigned integer 
	FIDT_RATIONAL	= 5,	//! 64-bit unsigned fraction 
	FIDT_SBYTE		= 6,	//! 8-bit signed integer 
	FIDT_UNDEFINED	= 7,	//! 8-bit untyped data 
	FIDT_SSHORT		= 8,	//! 16-bit signed integer 
	FIDT_SLONG		= 9,	//! 32-bit signed integer 
	FIDT_SRATIONAL	= 10,	//! 64-bit signed fraction 
	FIDT_FLOAT		= 11,	//! 32-bit IEEE floating point 
	FIDT_DOUBLE		= 12,	//! 64-bit IEEE floating point 
	FIDT_IFD		= 13,	//! 32-bit unsigned integer (offset) 
	FIDT_PALETTE	= 14,	//! 32-bit RGBQUAD 
	FIDT_LONG8		= 16,	//! 64-bit unsigned integer 
	FIDT_SLONG8		= 17,	//! 64-bit signed integer
	FIDT_IFD8		= 18	//! 64-bit unsigned integer (offset)
};

/**
  Metadata models supported by FreeImage
*/
FI_ENUM(FREE_IMAGE_MDMODEL) {
	FIMD_NODATA			= -1,
	FIMD_COMMENTS		= 0,	//! single comment or keywords
	FIMD_EXIF_MAIN		= 1,	//! Exif-TIFF metadata
	FIMD_EXIF_EXIF		= 2,	//! Exif-specific metadata
	FIMD_EXIF_GPS		= 3,	//! Exif GPS metadata
	FIMD_EXIF_MAKERNOTE = 4,	//! Exif maker note metadata
	FIMD_EXIF_INTEROP	= 5,	//! Exif interoperability metadata
	FIMD_IPTC			= 6,	//! IPTC/NAA metadata
	FIMD_XMP			= 7,	//! Abobe XMP metadata
	FIMD_GEOTIFF		= 8,	//! GeoTIFF metadata
	FIMD_ANIMATION		= 9,	//! Animation metadata
	FIMD_CUSTOM			= 10,	//! Used to attach other metadata types to a dib
	FIMD_EXIF_RAW		= 11	//! Exif metadata as a raw buffer
};

/**
  Handle to a metadata model
*/
FI_STRUCT (FIMETADATA) { void *data; };

/**
  Handle to a FreeImage tag
*/
FI_STRUCT (FITAG) { void *data; };

// File IO routines ---------------------------------------------------------

#ifndef FREEIMAGE_IO
#define FREEIMAGE_IO

typedef void* fi_handle;
typedef unsigned (DLL_CALLCONV *FI_ReadProc) (void *buffer, unsigned size, unsigned count, fi_handle handle);
typedef unsigned (DLL_CALLCONV *FI_WriteProc) (void *buffer, unsigned size, unsigned count, fi_handle handle);
typedef int (DLL_CALLCONV *FI_SeekProc) (fi_handle handle, long offset, int origin);
typedef long (DLL_CALLCONV *FI_TellProc) (fi_handle handle);

#if (defined(_WIN32) || defined(__WIN32__))
#pragma pack(push, 1)
#else
#pragma pack(1)
#endif // WIN32

FI_STRUCT(FreeImageIO) {
	FI_ReadProc  read_proc;     //! pointer to the function used to read data
    FI_WriteProc write_proc;    //! pointer to the function used to write data
    FI_SeekProc  seek_proc;     //! pointer to the function used to seek
    FI_TellProc  tell_proc;     //! pointer to the function used to aquire the current position
};

#if (defined(_WIN32) || defined(__WIN32__))
#pragma pack(pop)
#else
#pragma pack()
#endif // WIN32

/**
Handle to a memory I/O stream
*/
FI_STRUCT (FIMEMORY) { void *data; };

#endif // FREEIMAGE_IO

// Plugin routines ----------------------------------------------------------

#ifndef PLUGINS
#define PLUGINS

typedef const char *(DLL_CALLCONV *FI_FormatProc)(void);
typedef const char *(DLL_CALLCONV *FI_DescriptionProc)(void);
typedef const char *(DLL_CALLCONV *FI_ExtensionListProc)(void);
typedef const char *(DLL_CALLCONV *FI_RegExprProc)(void);
typedef void *(DLL_CALLCONV *FI_OpenProc)(FreeImageIO *io, fi_handle handle, BOOL read);