/usr/include/leptonica/imageio.h is in libleptonica-dev 1.69-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
#ifndef LEPTONICA_IMAGEIO_H
#define LEPTONICA_IMAGEIO_H
/* ------------------ Image file format types -------------- */
/*
* The IFF_DEFAULT flag is used to write the file out in the
* same (input) file format that the pix was read from. If the pix
* was not read from file, the input format field will be
* IFF_UNKNOWN and the output file format will be chosen to
* be compressed and lossless; namely, IFF_TIFF_G4 for d = 1
* and IFF_PNG for everything else. IFF_JP2 is for jpeg2000, which
* is not supported in leptonica.
*
* In the future, new format types that have defined extensions
* will be added before IFF_DEFAULT, and will be kept in sync with
* the file format extensions in writefile.c. The positions of
* file formats before IFF_DEFAULT will remain invariant.
*/
enum {
IFF_UNKNOWN = 0,
IFF_BMP = 1,
IFF_JFIF_JPEG = 2,
IFF_PNG = 3,
IFF_TIFF = 4,
IFF_TIFF_PACKBITS = 5,
IFF_TIFF_RLE = 6,
IFF_TIFF_G3 = 7,
IFF_TIFF_G4 = 8,
IFF_TIFF_LZW = 9,
IFF_TIFF_ZIP = 10,
IFF_PNM = 11,
IFF_PS = 12,
IFF_GIF = 13,
IFF_JP2 = 14,
IFF_WEBP = 15,
IFF_LPDF = 16,
IFF_DEFAULT = 17,
IFF_SPIX = 18
};
/* ---------------------- Format header ids --------------------- */
enum {
BMP_ID = 0x4d42,
TIFF_BIGEND_ID = 0x4d4d, /* MM - for 'motorola' */
TIFF_LITTLEEND_ID = 0x4949 /* II - for 'intel' */
};
/* ------------------ Gray hinting in jpeg reader --------------- */
enum {
L_HINT_GRAY = 1, /* only want grayscale information */
};
/* ------------------ Pdf formated encoding types --------------- */
enum {
L_JPEG_ENCODE = 1, /* use dct encoding: 8 and 32 bpp, no cmap */
L_G4_ENCODE = 2, /* use ccitt g4 fax encoding: 1 bpp */
L_FLATE_ENCODE = 3 /* use flate encoding: any depth, cmap ok */
};
/* ------------------ Compressed image data --------------------- */
/*
* In use, either datacomp or data85 will be produced, depending
* on whether the data needs to be ascii85 encoded. PostScript
* requires ascii85 encoding; pdf does not.
*
* For the colormap (flate compression only), PostScript uses ascii85
* encoding and pdf uses a bracketed array of space-separated
* hex-encoded rgb triples. Only tiff g4 (type == L_G4_ENCODE) uses
* the minisblack field.
*/
struct L_Compressed_Data
{
l_int32 type; /* encoding type: L_JPEG_ENCODE, etc */
l_uint8 *datacomp; /* gzipped raster data */
size_t nbytescomp; /* number of compressed bytes */
char *data85; /* ascii85-encoded gzipped raster data */
size_t nbytes85; /* number of ascii85 encoded bytes */
char *cmapdata85; /* ascii85-encoded uncompressed cmap */
char *cmapdatahex; /* hex pdf array for the cmap */
l_int32 ncolors; /* number of colors in cmap */
l_int32 w; /* image width */
l_int32 h; /* image height */
l_int32 bps; /* bits/sample; typ. 1, 2, 4 or 8 */
l_int32 spp; /* samples/pixel; typ. 1 or 3 */
l_int32 minisblack; /* tiff g4 photometry */
size_t nbytes; /* number of uncompressed raster bytes */
l_int32 res; /* resolution (ppi) */
};
typedef struct L_Compressed_Data L_COMPRESSED_DATA;
/* ------------------------ Pdf multi-image flags ------------------------ */
enum {
L_FIRST_IMAGE = 1, /* first image to be used */
L_NEXT_IMAGE = 2, /* intermediate image; not first or last */
L_LAST_IMAGE = 3 /* last image to be used */
};
/* ------------------ Intermediate pdf generation data -------------------- */
/*
* This accumulates data for generating a pdf of a single page consisting
* of an arbitrary number of images.
*
* None of the strings have a trailing newline.
*/
struct L_Pdf_Data
{
char *title; /* optional title for pdf */
l_int32 n; /* number of images */
l_int32 ncmap; /* number of colormaps */
struct L_Ptra *cida; /* array of compressed image data */
char *id; /* %PDF-1.2 id string */
char *obj1; /* catalog string */
char *obj2; /* metadata string */
char *obj3; /* pages string */
char *obj4; /* page string (variable data) */
char *obj5; /* content string (variable data) */
char *poststream; /* post-binary-stream string */
char *trailer; /* trailer string (variable data) */
struct Pta *xy; /* store (xpt, ypt) array */
struct Pta *wh; /* store (wpt, hpt) array */
struct Box *mediabox; /* bounding region for all images */
struct Sarray *saprex; /* pre-binary-stream xobject strings */
struct Sarray *sacmap; /* colormap pdf object strings */
struct L_Dna *objsize; /* sizes of each pdf string object */
struct L_Dna *objloc; /* location of each pdf string object */
l_int32 xrefloc; /* location of xref */
};
typedef struct L_Pdf_Data L_PDF_DATA;
#endif /* LEPTONICA_IMAGEIO_H */
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