io_tiff.cpp File Reference

TIFF I/O routines. More...

#include "io_tiff.h"

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Defines
#define	TIFFPackRGBA(r, g, b, a)
Functions
static uint32 *	read_tiff_rgba_raw (const char *fname, size_t *nx, size_t *ny)
	load the raw data from a TIFF image file as an uint32 array.
static void *	read_tiff_rgba (const char *fname, size_t *nx, size_t *ny, int dtype)
	load the data from a TIFF image file as an RGBA array
float *	read_tiff_rgba_f32 (const char *fname, size_t *nx, size_t *ny)
	load the data from a TIFF image file as a float RGBA array
unsigned char *	read_tiff_rgba_u8 (const char *fname, size_t *nx, size_t *ny)
	load the data from a TIFF image file as a 8bit RGBA array
static int	write_tiff_rgba_raw (const char *fname, const uint32 *data_tiff, size_t nx, size_t ny)
	save an array into a LZW-compressed TIFF file
static int	write_tiff_rgba (const char *fname, const void *data, size_t nx, size_t ny, int dtype)
	save four contiguous arrays into a TIFF file
int	write_tiff_rgba_f32 (const char *fname, const float *data, size_t nx, size_t ny)
	save four contiguous float arrays into a TIFF file
int	write_tiff_rgba_u8 (const char *fname, const unsigned char *data, size_t nx, size_t ny)
	save four contiguous 8bit arrays into a TIFF file

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Detailed Description

TIFF I/O routines.

Author:

Nicolas Limare <nicolas.limare@cmla.ens-cachan.fr>

Todo:

stdin/stdout handling

simple RGB/grayscale version

TIFF float version

These routines focus on RGBA 8bit TIFF files. These files can be read into or written from unsigned char or float arrays.

Definition in file io_tiff.cpp.

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Define Documentation

#define TIFFPackRGBA	(	r,
		g,
		b,
		a		)

Value:

(uint32) ((r & 0xff)                   \
| (g & 0xff) << 8            \
| (b & 0xff) << 16           \
| (a & 0xff) << 24)

Macro for packing RGBA components to the ABGR form used by TIFFReadRGBAImage.

See TIFFGetR() in tiffio.h for the reverse operation.

Definition at line 289 of file io_tiff.cpp.

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Function Documentation

static void* read_tiff_rgba	(	const char *	fname,
		size_t *	nx,
		size_t *	ny,
		int	dtype
	)			[static]

load the data from a TIFF image file as an RGBA array

The array is allocated by this function. It hold the RGBA pixels as 4 contiguous arrays.

Parameters:

	fname	the file name to read
	nx,ny	storage space for the image size
	dtype	the desired output type : DT_U8 or DT_F32

Returns:

the data array pointer, NULL if an error occured

Definition at line 96 of file io_tiff.cpp.

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float* read_tiff_rgba_f32	(	const char *	fname,
		size_t *	nx,
		size_t *	ny
	)

load the data from a TIFF image file as a float RGBA array

The array is allocated in this function call. It hold the RGBA pixels as 4 contiguous arrays.

Parameters:

	fname	the file name to read
	nx,ny	storage space for the image size

Returns:

the data array pointer, NULL if an error occured

Definition at line 198 of file io_tiff.cpp.

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static uint32* read_tiff_rgba_raw	(	const char *	fname,
		size_t *	nx,
		size_t *	ny
	)			[static]

load the raw data from a TIFF image file as an uint32 array.

The array is allocated by this function. Uint32 is the native data type in libtiff.

Parameters:

	fname	the file name to read
	nx,ny	storage space for the image size

Returns:

the data array pointer, NULL if an error occured

Definition at line 39 of file io_tiff.cpp.

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unsigned char* read_tiff_rgba_u8	(	const char *	fname,
		size_t *	nx,
		size_t *	ny
	)

load the data from a TIFF image file as a 8bit RGBA array

The array is allocated in this function call. It hold the RGBA pixels as 4 contiguous arrays.

Parameters:

	fname	the file name to read
	nx,ny	storage space for the image size

Returns:

the data array pointer, NULL if an error occured

Definition at line 214 of file io_tiff.cpp.

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static int write_tiff_rgba	(	const char *	fname,
		const void *	data,
		size_t	nx,
		size_t	ny,
		int	dtype
	)			[static]

save four contiguous arrays into a TIFF file

The array balues are supposed in [0,255].

Parameters:

	fname	TIFF file name
	data	input array of float values supposed in [0,255]
	nx	ny array size
	dtype	the input data type : DT_U8 or DT_F32

Returns:

0 if OK, != 0 if an error occured

Definition at line 306 of file io_tiff.cpp.

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int write_tiff_rgba_f32	(	const char *	fname,
		const float *	data,
		size_t	nx,
		size_t	ny
	)

save four contiguous float arrays into a TIFF file

Parameters:

	fname	TIFF file name
	data	input array of float values supposed in [0,255]
	nx	ny array size

Returns:

0 if OK, != 0 if an error occured

Definition at line 388 of file io_tiff.cpp.

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static int write_tiff_rgba_raw	(	const char *	fname,
		const uint32 *	data_tiff,
		size_t	nx,
		size_t	ny
	)			[static]

save an array into a LZW-compressed TIFF file

Returns:

0 if OK, != 0 if an error occured

Definition at line 228 of file io_tiff.cpp.

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int write_tiff_rgba_u8	(	const char *	fname,
		const unsigned char *	data,
		size_t	nx,
		size_t	ny
	)

save four contiguous 8bit arrays into a TIFF file

Parameters:

	fname	TIFF file name
	data	input array of 8bit values
	nx	ny array size

Returns:

0 if OK, != 0 if an error occured

Definition at line 403 of file io_tiff.cpp.

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