#include <string.h>
#include <ctype.h>
#include "allheaders.h"

Функции
static l_int32	pnmReadNextAsciiValue (FILE fp, l_int32 pval)

static l_int32	pnmReadNextNumber (FILE fp, l_int32 pval)

static l_int32	pnmSkipCommentLines (FILE *fp)

PIX *	pixReadStreamPnm (FILE *fp)

l_int32	readHeaderPnm (const char filename, l_int32 pw, l_int32 ph, l_int32 pd, l_int32 ptype, l_int32 pbps, l_int32 *pspp)

l_int32	freadHeaderPnm (FILE fp, l_int32 pw, l_int32 ph, l_int32 pd, l_int32 ptype, l_int32 pbps, l_int32 *pspp)

l_int32	pixWriteStreamPnm (FILE fp, PIX pix)

l_int32	pixWriteStreamAsciiPnm (FILE fp, PIX pix)

FILE *	open_memstream (char *data, size_t size)

FILE *	fmemopen (void data, size_t size, const char mode)

PIX *	pixReadMemPnm (const l_uint8 *cdata, size_t size)

l_int32	readHeaderMemPnm (const l_uint8 cdata, size_t size, l_int32 pw, l_int32 ph, l_int32 pd, l_int32 ptype, l_int32 pbps, l_int32 *pspp)

l_int32	pixWriteMemPnm (l_uint8 *pdata, size_t psize, PIX *pix)

Переменные
static const l_int32	MAX_PNM_WIDTH = 100000

static const l_int32	MAX_PNM_HEIGHT = 100000

Функции

◆ fmemopen()

FILE* fmemopen	(	void *	data,
		size_t	size,
		const char *	mode
	)

◆ freadHeaderPnm()

l_int32 freadHeaderPnm	(	FILE *	fp,
		l_int32 *	pw,
		l_int32 *	ph,
		l_int32 *	pd,
		l_int32 *	ptype,
		l_int32 *	pbps,
		l_int32 *	pspp
	)

freadHeaderPnm()

Input:  stream opened for read
        &w (<optional return>)
        &h (<optional return>)
        &d (<optional return>)
        &type (<optional return> pnm type)
        &bps (<optional return>, bits/sample)
        &spp (<optional return>, samples/pixel)
Return: 0 if OK, 1 on error

◆ open_memstream()

FILE* open_memstream	(	char **	data,
		size_t *	size
	)

◆ pixReadMemPnm()

PIX* pixReadMemPnm	(	const l_uint8 *	cdata,
		size_t	size
	)

pixReadMemPnm()

Input:  cdata (const; pnm-encoded)
        size (of data)
Return: pix, or null on error

Notes: (1) The @size byte of @data must be a null character.

◆ pixReadStreamPnm()

PIX* pixReadStreamPnm ( FILE * fp )

pixReadStreamPnm()

Input:  stream opened for read
Return: pix, or null on error

◆ pixWriteMemPnm()

l_int32 pixWriteMemPnm	(	l_uint8 **	pdata,
		size_t *	psize,
		PIX *	pix
	)

pixWriteMemPnm()

Input:  &data (<return> data of tiff compressed image)
        &size (<return> size of returned data)
        pix
Return: 0 if OK, 1 on error

Notes: (1) See pixWriteStreamPnm() for usage. This version writes to memory instead of to a file stream.

◆ pixWriteStreamAsciiPnm()

l_int32 pixWriteStreamAsciiPnm	(	FILE *	fp,
		PIX *	pix
	)

pixWriteStreamAsciiPnm()

Input:  stream opened for write
        pix
Return: 0 if OK; 1 on error

Writes "ascii" format only: 1 bpp --> pbm (P1) 2, 4, 8, 16 bpp, no colormap or grayscale colormap --> pgm (P2) 2, 4, 8 bpp with color-valued colormap, or rgb --> rgb ppm (P3)

◆ pixWriteStreamPnm()

l_int32 pixWriteStreamPnm	(	FILE *	fp,
		PIX *	pix
	)

pixWriteStreamPnm()

Input:  stream opened for write
        pix
Return: 0 if OK; 1 on error

Notes: (1) This writes "raw" packed format only: 1 bpp --> pbm (P4) 2, 4, 8, 16 bpp, no colormap or grayscale colormap --> pgm (P5) 2, 4, 8 bpp with color-valued colormap, or rgb --> rgb ppm (P6) (2) 24 bpp rgb are not supported in leptonica, but this will write them out as a packed array of bytes (3 to a pixel).

◆ pnmReadNextAsciiValue()

static l_int32 pnmReadNextAsciiValue	(	FILE *	fp,
		l_int32 *	pval
	)

static

pnmReadNextAsciiValue()

Return: 0 if OK, 1 on error or EOF.

Notes: (1) This reads the next sample value in ascii from the the file.

◆ pnmReadNextNumber()

static l_int32 pnmReadNextNumber	(	FILE *	fp,
		l_int32 *	pval
	)

static

pnmReadNextNumber()

Input:  file stream
        &val (<return> value as an integer)
Return: 0 if OK, 1 on error or EOF.

Notes: (1) This reads the next set of numeric chars, returning the value and swallowing the trailing whitespace character. This is needed to read the maxval in the header, which precedes the binary data.

◆ pnmSkipCommentLines()

static l_int32 pnmSkipCommentLines ( FILE * fp )

static

pnmSkipCommentLines()

Return: 0 if OK, 1 on error or EOF

Notes: (1) Comment lines begin with '#' (2) Usage: caller should check return value for EOF

◆ readHeaderMemPnm()

l_int32 readHeaderMemPnm	(	const l_uint8 *	cdata,
		size_t	size,
		l_int32 *	pw,
		l_int32 *	ph,
		l_int32 *	pd,
		l_int32 *	ptype,
		l_int32 *	pbps,
		l_int32 *	pspp
	)

readHeaderMemPnm()

Input:  cdata (const; pnm-encoded)
        size (of data)
        &w (<optional return>)
        &h (<optional return>)
        &d (<optional return>)
        &type (<optional return> pnm type)
        &bps (<optional return>, bits/sample)
        &spp (<optional return>, samples/pixel)
Return: 0 if OK, 1 on error

◆ readHeaderPnm()

l_int32 readHeaderPnm	(	const char *	filename,
		l_int32 *	pw,
		l_int32 *	ph,
		l_int32 *	pd,
		l_int32 *	ptype,
		l_int32 *	pbps,
		l_int32 *	pspp
	)

readHeaderPnm()

Input:  filename
        &w (<optional return>)
        &h (<optional return>)
        &d (<optional return>)
        &type (<optional return> pnm type)
        &bps (<optional return>, bits/sample)
        &spp (<optional return>, samples/pixel)
Return: 0 if OK, 1 on error

Переменные

◆ MAX_PNM_HEIGHT

const l_int32 MAX_PNM_HEIGHT = 100000

static

◆ MAX_PNM_WIDTH

const l_int32 MAX_PNM_WIDTH = 100000

static