pnm_cod.h

jpeg2000 test program

/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2002 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
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 * JasPer License Version 2.0
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 * Copyright (c) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 * Copyright (c) 2001-2003 Michael David Adams
 * 
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/*
 * Portable Pixmap/Graymap Format Support
 *
 * $Id$
 */

#ifndef PNM_COD_H
#define PNM_COD_H

/******************************************************************************\
* Includes.
\******************************************************************************/

#include "jasper/jas_types.h"

/******************************************************************************\
* Constants.
\******************************************************************************/

/* Magic numbers. */
#define PNM_MAGIC_TXTPBM	0x5031 /* Text Portable BitMap (P1) */
#define PNM_MAGIC_TXTPGM	0x5032 /* Text Portable GrayMap (P2) */
#define PNM_MAGIC_TXTPPM	0x5033 /* Text Portable PixMap (P3) */
#define PNM_MAGIC_BINPBM	0x5034 /* Binary Portable BitMap (P4) */
#define PNM_MAGIC_BINPGM	0x5035 /* Binary Portable GrayMap (P5) */
#define PNM_MAGIC_BINPPM	0x5036 /* Binary Portable PixMap (P6) */
#define	PNM_MAGIC_PAM		0x5037 /* PAM (P7) */

/* Type of image data. */
#define PNM_TYPE_PPM	0 /* PixMap */
#define PNM_TYPE_PGM	1 /* GrayMap */
#define PNM_TYPE_PBM	2 /* BitMap */

/* Format of image data. */
#define PNM_FMT_TXT	0 /* Text */
#define PNM_FMT_BIN	1 /* Binary */

#define	PNM_MAXLINELEN	79

#define	PNM_TUPLETYPE_UNKNOWN	0
#define	PNM_TUPLETYPE_MONO	1
#define	PNM_TUPLETYPE_GRAY	2
#define	PNM_TUPLETYPE_GRAYA	3
#define	PNM_TUPLETYPE_RGB	4
#define	PNM_TUPLETYPE_RGBA	5

/******************************************************************************\
* Types.
\******************************************************************************/

/* File header. */

typedef struct {

	int magic;
	/* The magic number. */

	int width;
	/* The image width. */

	int height;
	/* The image height. */

	int numcmpts;

	int maxval;
	/* The maximum allowable sample value. */

#if 0
	int tupletype;
#endif

	bool sgnd;
	/* The sample data is signed. */

} pnm_hdr_t;

/******************************************************************************\
* Functions.
\******************************************************************************/

int pnm_type(uint_fast16_t magic);
/* Determine type (i.e., PGM or PPM) from magic number. */

int pnm_fmt(uint_fast16_t magic);
/* Determine format (i.e., text or binary) from magic number. */

int pnm_maxvaltodepth(uint_fast32_t maxval);
/* Determine depth (i.e., precision) from maximum value. */

#define	PNM_ONES(n) \
	(((n) < 32) ? ((1UL << (n)) - 1) : 0xffffffffUL)
#endif