/usr/include/leptonica/pix.h is in libleptonica-dev 1.75.3-3.
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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 | /*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials
- provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*====================================================================*/
#ifndef LEPTONICA_PIX_H
#define LEPTONICA_PIX_H
/*!
* \file pix.h
*
* <pre>
* Valid image types in leptonica:
* Pix: 1 bpp, with and without colormap
* Pix: 2 bpp, with and without colormap
* Pix: 4 bpp, with and without colormap
* Pix: 8 bpp, with and without colormap
* Pix: 16 bpp (1 spp)
* Pix: 32 bpp (rgb, 3 spp)
* Pix: 32 bpp (rgba, 4 spp)
* FPix: 32 bpp float
* DPix: 64 bpp double
* Notes:
* (1) The only valid Pix image type with alpha is rgba.
* In particular, the alpha component is not used in
* cmapped images.
* (2) PixComp can hold any Pix with IFF_PNG encoding.
*
* Contents:
*
* (1) This file defines most of the image-related structs used in leptonica:
* struct Pix
* struct PixColormap
* struct RGBA_Quad
* struct Pixa
* struct Pixaa
* struct Box
* struct Boxa
* struct Boxaa
* struct Pta
* struct Ptaa
* struct Pixacc
* struct PixTiling
* struct FPix
* struct FPixa
* struct DPix
* struct PixComp
* struct PixaComp
*
* (2) This file has definitions for:
* Colors for RGB
* Colors for drawing boxes
* Perceptual color weights
* Colormap conversion flags
* Rasterop bit flags
* Structure access flags (for insert, copy, clone, copy-clone)
* Sorting flags (by type and direction)
* Blending flags
* Graphics pixel setting flags
* Size filtering flags
* Color component selection flags
* 16-bit conversion flags
* Rotation and shear flags
* Affine transform order flags
* Grayscale filling flags
* Flags for setting to white or black
* Flags for getting white or black pixel value
* Flags for 8 and 16 bit pixel sums
* Dithering flags
* Distance flags
* Value flags
* Statistical measures
* Set selection flags
* Text orientation flags
* Edge orientation flags
* Line orientation flags
* Image orientation flags
* Scan direction flags
* Box size adjustment flags
* Flags for modifying box boundaries using a second box
* Handling overlapping bounding boxes in boxa
* Flags for replacing invalid boxes
* Horizontal warp
* Pixel selection for resampling
* Thinning flags
* Runlength flags
* Edge filter flags
* Subpixel color component ordering in LCD display
* HSV histogram flags
* Region flags (inclusion, exclusion)
* Flags for adding text to a pix
* Flags for plotting on a pix
* Flags for selecting display program
* Flags in the 'special' pix field for non-default operations
* Handling negative values in conversion to unsigned int
* Relative to zero flags
* Flags for adding or removing traling slash from string
*
* (3) This file has typedefs for the pix allocator and deallocator functions
* alloc_fn()
* dealloc_fn().
* </pre>
*/
/*-------------------------------------------------------------------------*
* Basic Pix *
*-------------------------------------------------------------------------*/
/* The 'special' field is by default 0, but it can hold integers
* that direct non-default actions, e.g., in png and jpeg I/O. */
/*! Basic Pix */
struct Pix
{
l_uint32 w; /*!< width in pixels */
l_uint32 h; /*!< height in pixels */
l_uint32 d; /*!< depth in bits (bpp) */
l_uint32 spp; /*!< number of samples per pixel */
l_uint32 wpl; /*!< 32-bit words/line */
l_uint32 refcount; /*!< reference count (1 if no clones) */
l_int32 xres; /*!< image res (ppi) in x direction */
/*!< (use 0 if unknown) */
l_int32 yres; /*!< image res (ppi) in y direction */
/*!< (use 0 if unknown) */
l_int32 informat; /*!< input file format, IFF_* */
l_int32 special; /*!< special instructions for I/O, etc */
char *text; /*!< text string associated with pix */
struct PixColormap *colormap; /*!< colormap (may be null) */
l_uint32 *data; /*!< the image data */
};
typedef struct Pix PIX;
/*! Colormap of a Pix */
struct PixColormap
{
void *array; /*!< colormap table (array of RGBA_QUAD) */
l_int32 depth; /*!< of pix (1, 2, 4 or 8 bpp) */
l_int32 nalloc; /*!< number of color entries allocated */
l_int32 n; /*!< number of color entries used */
};
typedef struct PixColormap PIXCMAP;
/*! Colormap table entry (after the BMP version).
* Note that the BMP format stores the colormap table exactly
* as it appears here, with color samples being stored sequentially,
* in the order (b,g,r,a). */
struct RGBA_Quad
{
l_uint8 blue; /*!< blue value */
l_uint8 green; /*!< green value */
l_uint8 red; /*!< red value */
l_uint8 alpha; /*!< alpha value */
};
typedef struct RGBA_Quad RGBA_QUAD;
/*-------------------------------------------------------------------------*
* Colors for 32 bpp *
*-------------------------------------------------------------------------*/
/* <pre>
* Notes:
* (1) These are the byte indices for colors in 32 bpp images.
* They are used through the GET/SET_DATA_BYTE accessors.
* The 4th byte, typically known as the "alpha channel" and used
* for blending, is used to a small extent in leptonica.
* (2) Do not change these values! If you redefine them, functions
* that have the shifts hardcoded for efficiency and conciseness
* (instead of using the constants below) will break. These
* functions are labelled with "***" next to their names at
* the top of the files in which they are defined.
* (3) The shifts to extract the red, green, blue and alpha components
* from a 32 bit pixel are defined here.
* </pre>
*/
/*! Colors for 32 bpp */
enum {
COLOR_RED = 0, /*!< red color index in RGBA_QUAD */
COLOR_GREEN = 1, /*!< green color index in RGBA_QUAD */
COLOR_BLUE = 2, /*!< blue color index in RGBA_QUAD */
L_ALPHA_CHANNEL = 3 /*!< alpha value index in RGBA_QUAD */
};
static const l_int32 L_RED_SHIFT =
8 * (sizeof(l_uint32) - 1 - COLOR_RED); /* 24 */
static const l_int32 L_GREEN_SHIFT =
8 * (sizeof(l_uint32) - 1 - COLOR_GREEN); /* 16 */
static const l_int32 L_BLUE_SHIFT =
8 * (sizeof(l_uint32) - 1 - COLOR_BLUE); /* 8 */
static const l_int32 L_ALPHA_SHIFT =
8 * (sizeof(l_uint32) - 1 - L_ALPHA_CHANNEL); /* 0 */
/*-------------------------------------------------------------------------*
* Colors for drawing boxes *
*-------------------------------------------------------------------------*/
/*! Colors for drawing boxes */
enum {
L_DRAW_RED = 0, /*!< draw in red */
L_DRAW_GREEN = 1, /*!< draw in green */
L_DRAW_BLUE = 2, /*!< draw in blue */
L_DRAW_SPECIFIED = 3, /*!< draw specified color */
L_DRAW_RGB = 4, /*!< draw as sequence of r,g,b */
L_DRAW_RANDOM = 5 /*!< draw randomly chosen colors */
};
/*-------------------------------------------------------------------------*
* Perceptual color weights *
*-------------------------------------------------------------------------*/
/* <pre>
* Notes:
* (1) These perceptual weighting factors are ad-hoc, but they do
* add up to 1. Unlike, for example, the weighting factors for
* converting RGB to luminance, or more specifically to Y in the
* YUV colorspace. Those numbers come from the
* International Telecommunications Union, via ITU-R.
* </pre>
*/
static const l_float32 L_RED_WEIGHT = 0.3; /*!< Percept. weight for red */
static const l_float32 L_GREEN_WEIGHT = 0.5; /*!< Percept. weight for green */
static const l_float32 L_BLUE_WEIGHT = 0.2; /*!< Percept. weight for blue */
/*-------------------------------------------------------------------------*
* Flags for colormap conversion *
*-------------------------------------------------------------------------*/
/*! Flags for colormap conversion */
enum {
REMOVE_CMAP_TO_BINARY = 0, /*!< remove colormap for conv to 1 bpp */
REMOVE_CMAP_TO_GRAYSCALE = 1, /*!< remove colormap for conv to 8 bpp */
REMOVE_CMAP_TO_FULL_COLOR = 2, /*!< remove colormap for conv to 32 bpp */
REMOVE_CMAP_WITH_ALPHA = 3, /*!< remove colormap and alpha */
REMOVE_CMAP_BASED_ON_SRC = 4 /*!< remove depending on src format */
};
/*------------------------------------------------------------------------*
*!
* <pre>
* The following operation bit flags have been modified from
* Sun's pixrect.h.
*
* The 'op' in 'rasterop' is represented by an integer
* composed with Boolean functions using the set of five integers
* given below. The integers, and the op codes resulting from
* boolean expressions on them, need only be in the range from 0 to 15.
* The function is applied on a per-pixel basis.
*
* Examples: the op code representing ORing the src and dest
* is computed using the bit OR, as PIX_SRC | PIX_DST; the op
* code representing XORing src and dest is found from
* PIX_SRC ^ PIX_DST; the op code representing ANDing src and dest
* is found from PIX_SRC & PIX_DST. Note that
* PIX_NOT(PIX_CLR) = PIX_SET, and v.v., as they must be.
*
* We use the following set of definitions:
*
* #define PIX_SRC 0xc
* #define PIX_DST 0xa
* #define PIX_NOT(op) (op) ^ 0xf
* #define PIX_CLR 0x0
* #define PIX_SET 0xf
*
* These definitions differ from Sun's, in that Sun left-shifted
* each value by 1 pixel, and used the least significant bit as a
* flag for the "pseudo-operation" of clipping. We don't need
* this bit, because it is both efficient and safe ALWAYS to clip
* the rectangles to the src and dest images, which is what we do.
* See the notes in rop.h on the general choice of these bit flags.
*
* [If for some reason you need compatibility with Sun's xview package,
* you can adopt the original Sun definitions to avoid redefinition conflicts:
*
* #define PIX_SRC (0xc << 1)
* #define PIX_DST (0xa << 1)
* #define PIX_NOT(op) ((op) ^ 0x1e)
* #define PIX_CLR (0x0 << 1)
* #define PIX_SET (0xf << 1)
* ]
*
* We have, for reference, the following 16 unique op flags:
*
* PIX_CLR 0000 0x0
* PIX_SET 1111 0xf
* PIX_SRC 1100 0xc
* PIX_DST 1010 0xa
* PIX_NOT(PIX_SRC) 0011 0x3
* PIX_NOT(PIX_DST) 0101 0x5
* PIX_SRC | PIX_DST 1110 0xe
* PIX_SRC & PIX_DST 1000 0x8
* PIX_SRC ^ PIX_DST 0110 0x6
* PIX_NOT(PIX_SRC) | PIX_DST 1011 0xb
* PIX_NOT(PIX_SRC) & PIX_DST 0010 0x2
* PIX_SRC | PIX_NOT(PIX_DST) 1101 0xd
* PIX_SRC & PIX_NOT(PIX_DST) 0100 0x4
* PIX_NOT(PIX_SRC | PIX_DST) 0001 0x1
* PIX_NOT(PIX_SRC & PIX_DST) 0111 0x7
* PIX_NOT(PIX_SRC ^ PIX_DST) 1001 0x9
*
* </pre>
*-------------------------------------------------------------------------*/
#define PIX_SRC (0xc) /*!< use source pixels */
#define PIX_DST (0xa) /*!< use destination pixels */
#define PIX_NOT(op) ((op) ^ 0x0f) /*!< invert operation %op */
#define PIX_CLR (0x0) /*!< clear pixels */
#define PIX_SET (0xf) /*!< set pixels */
#define PIX_PAINT (PIX_SRC | PIX_DST) /*!< paint = src | dst */
#define PIX_MASK (PIX_SRC & PIX_DST) /*!< mask = src & dst */
#define PIX_SUBTRACT (PIX_DST & PIX_NOT(PIX_SRC)) /*!< subtract = */
/*!< src & !dst */
#define PIX_XOR (PIX_SRC ^ PIX_DST) /*!< xor = src ^ dst */
/*-------------------------------------------------------------------------*
* <pre>
* Important Notes:
*
* (1) The image data is stored in a single contiguous
* array of l_uint32, into which the pixels are packed.
* By "packed" we mean that there are no unused bits
* between pixels, except for end-of-line padding to
* satisfy item (2) below.
*
* (2) Every image raster line begins on a 32-bit word
* boundary within this array.
*
* (3) Pix image data is stored in 32-bit units, with the
* pixels ordered from left to right in the image being
* stored in order from the MSB to LSB within the word,
* for both big-endian and little-endian machines.
* This is the natural ordering for big-endian machines,
* as successive bytes are stored and fetched progressively
* to the right. However, for little-endians, when storing
* we re-order the bytes from this byte stream order, and
* reshuffle again for byte access on 32-bit entities.
* So if the bytes come in sequence from left to right, we
* store them on little-endians in byte order:
* 3 2 1 0 7 6 5 4 ...
* This MSB to LSB ordering allows left and right shift
* operations on 32 bit words to move the pixels properly.
*
* (4) We use 32 bit pixels for both RGB and RGBA color images.
* The A (alpha) byte is ignored in most leptonica functions
* operating on color images. Within each 4 byte pixel, the
* color samples are ordered from MSB to LSB, as follows:
*
* | MSB | 2nd MSB | 3rd MSB | LSB |
* red green blue alpha
* 0 1 2 3 (big-endian)
* 3 2 1 0 (little-endian)
*
* Because we use MSB to LSB ordering within the 32-bit word,
* the individual 8-bit samples can be accessed with
* GET_DATA_BYTE and SET_DATA_BYTE macros, using the
* (implicitly big-ending) ordering
* red: byte 0 (MSB)
* green: byte 1 (2nd MSB)
* blue: byte 2 (3rd MSB)
* alpha: byte 3 (LSB)
*
* The specific color assignment is made in this file,
* through the definitions of COLOR_RED, etc. Then the R, G
* B and A sample values can be retrieved using
* redval = GET_DATA_BYTE(&pixel, COLOR_RED);
* greenval = GET_DATA_BYTE(&pixel, COLOR_GREEN);
* blueval = GET_DATA_BYTE(&pixel, COLOR_BLUE);
* alphaval = GET_DATA_BYTE(&pixel, L_ALPHA_CHANNEL);
* and they can be set with
* SET_DATA_BYTE(&pixel, COLOR_RED, redval);
* SET_DATA_BYTE(&pixel, COLOR_GREEN, greenval);
* SET_DATA_BYTE(&pixel, COLOR_BLUE, blueval);
* SET_DATA_BYTE(&pixel, L_ALPHA_CHANNEL, alphaval);
*
* More efficiently, these components can be extracted directly
* by shifting and masking, explicitly using the values in
* L_RED_SHIFT, etc.:
* (pixel32 >> L_RED_SHIFT) & 0xff; (red)
* (pixel32 >> L_GREEN_SHIFT) & 0xff; (green)
* (pixel32 >> L_BLUE_SHIFT) & 0xff; (blue)
* (pixel32 >> L_ALPHA_SHIFT) & 0xff; (alpha)
* The functions extractRGBValues() and extractRGBAValues() are
* provided to do this. Likewise, the pixels can be set
* directly by shifting, using composeRGBPixel() and
* composeRGBAPixel().
*
* All these operations work properly on both big- and little-endians.
*
* (5) A reference count is held within each pix, giving the
* number of ptrs to the pix. When a pixClone() call
* is made, the ref count is increased by 1, and
* when a pixDestroy() call is made, the reference count
* of the pix is decremented. The pix is only destroyed
* when the reference count goes to zero.
*
* (6) The version numbers (below) are used in the serialization
* of these data structures. They are placed in the files,
* and rarely (if ever) change. Provision is currently made for
* backward compatibility in reading from boxaa version 2.
*
* (7) The serialization dependencies are as follows:
* pixaa : pixa : boxa
* boxaa : boxa
* So, for example, pixaa and boxaa can be changed without
* forcing a change in pixa or boxa. However, if pixa is
* changed, it forces a change in pixaa, and if boxa is
* changed, if forces a change in the other three.
* We define four version numbers:
* PIXAA_VERSION_NUMBER
* PIXA_VERSION_NUMBER
* BOXAA_VERSION_NUMBER
* BOXA_VERSION_NUMBER
* </pre>
*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*
* Array of pix *
*-------------------------------------------------------------------------*/
/* Serialization for primary data structures */
#define PIXAA_VERSION_NUMBER 2 /*!< Version for Pixaa serialization */
#define PIXA_VERSION_NUMBER 2 /*!< Version for Pixa serialization */
#define BOXA_VERSION_NUMBER 2 /*!< Version for Boxa serialization */
#define BOXAA_VERSION_NUMBER 3 /*!< Version for Boxaa serialization */
/*! Array of pix */
struct Pixa
{
l_int32 n; /*!< number of Pix in ptr array */
l_int32 nalloc; /*!< number of Pix ptrs allocated */
l_uint32 refcount; /*!< reference count (1 if no clones) */
struct Pix **pix; /*!< the array of ptrs to pix */
struct Boxa *boxa; /*!< array of boxes */
};
typedef struct Pixa PIXA;
/*! Array of arrays of pix */
struct Pixaa
{
l_int32 n; /*!< number of Pixa in ptr array */
l_int32 nalloc; /*!< number of Pixa ptrs allocated */
struct Pixa **pixa; /*!< array of ptrs to pixa */
struct Boxa *boxa; /*!< array of boxes */
};
typedef struct Pixaa PIXAA;
/*-------------------------------------------------------------------------*
* Basic rectangle and rectangle arrays *
*-------------------------------------------------------------------------*/
/*! Basic rectangle */
struct Box
{
l_int32 x; /*!< left coordinate */
l_int32 y; /*!< top coordinate */
l_int32 w; /*!< box width */
l_int32 h; /*!< box height */
l_uint32 refcount; /*!< reference count (1 if no clones) */
};
typedef struct Box BOX;
/*! Array of Box */
struct Boxa
{
l_int32 n; /*!< number of box in ptr array */
l_int32 nalloc; /*!< number of box ptrs allocated */
l_uint32 refcount; /*!< reference count (1 if no clones) */
struct Box **box; /*!< box ptr array */
};
typedef struct Boxa BOXA;
/*! Array of Boxa */
struct Boxaa
{
l_int32 n; /*!< number of boxa in ptr array */
l_int32 nalloc; /*!< number of boxa ptrs allocated */
struct Boxa **boxa; /*!< boxa ptr array */
};
typedef struct Boxaa BOXAA;
/*-------------------------------------------------------------------------*
* Array of points *
*-------------------------------------------------------------------------*/
#define PTA_VERSION_NUMBER 1 /*!< Version for Pta serialization */
/*! Array of points */
struct Pta
{
l_int32 n; /*!< actual number of pts */
l_int32 nalloc; /*!< size of allocated arrays */
l_uint32 refcount; /*!< reference count (1 if no clones) */
l_float32 *x, *y; /*!< arrays of floats */
};
typedef struct Pta PTA;
/*-------------------------------------------------------------------------*
* Array of Pta *
*-------------------------------------------------------------------------*/
/*! Array of Pta */
struct Ptaa
{
l_int32 n; /*!< number of pta in ptr array */
l_int32 nalloc; /*!< number of pta ptrs allocated */
struct Pta **pta; /*!< pta ptr array */
};
typedef struct Ptaa PTAA;
/*-------------------------------------------------------------------------*
* Pix accumulator container *
*-------------------------------------------------------------------------*/
/*! Pix accumulator container */
struct Pixacc
{
l_int32 w; /*!< array width */
l_int32 h; /*!< array height */
l_int32 offset; /*!< used to allow negative */
/*!< intermediate results */
struct Pix *pix; /*!< the 32 bit accumulator pix */
};
typedef struct Pixacc PIXACC;
/*-------------------------------------------------------------------------*
* Pix tiling *
*-------------------------------------------------------------------------*/
/*! Pix tiling */
struct PixTiling
{
struct Pix *pix; /*!< input pix (a clone) */
l_int32 nx; /*!< number of tiles horizontally */
l_int32 ny; /*!< number of tiles vertically */
l_int32 w; /*!< tile width */
l_int32 h; /*!< tile height */
l_int32 xoverlap; /*!< overlap on left and right */
l_int32 yoverlap; /*!< overlap on top and bottom */
l_int32 strip; /*!< strip for paint; default is TRUE */
};
typedef struct PixTiling PIXTILING;
/*-------------------------------------------------------------------------*
* FPix: pix with float array *
*-------------------------------------------------------------------------*/
#define FPIX_VERSION_NUMBER 2 /*!< Version for FPix serialization */
/*! Pix with float array */
struct FPix
{
l_int32 w; /*!< width in pixels */
l_int32 h; /*!< height in pixels */
l_int32 wpl; /*!< 32-bit words/line */
l_uint32 refcount; /*!< reference count (1 if no clones) */
l_int32 xres; /*!< image res (ppi) in x direction */
/*!< (use 0 if unknown) */
l_int32 yres; /*!< image res (ppi) in y direction */
/*!< (use 0 if unknown) */
l_float32 *data; /*!< the float image data */
};
typedef struct FPix FPIX;
/*! Array of FPix */
struct FPixa
{
l_int32 n; /*!< number of fpix in ptr array */
l_int32 nalloc; /*!< number of fpix ptrs allocated */
l_uint32 refcount; /*!< reference count (1 if no clones) */
struct FPix **fpix; /*!< the array of ptrs to fpix */
};
typedef struct FPixa FPIXA;
/*-------------------------------------------------------------------------*
* DPix: pix with double array *
*-------------------------------------------------------------------------*/
#define DPIX_VERSION_NUMBER 2 /*!< Version for DPix serialization */
/*! Pix with double array */
struct DPix
{
l_int32 w; /*!< width in pixels */
l_int32 h; /*!< height in pixels */
l_int32 wpl; /*!< 32-bit words/line */
l_uint32 refcount; /*!< reference count (1 if no clones) */
l_int32 xres; /*!< image res (ppi) in x direction */
/*!< (use 0 if unknown) */
l_int32 yres; /*!< image res (ppi) in y direction */
/*!< (use 0 if unknown) */
l_float64 *data; /*!< the double image data */
};
typedef struct DPix DPIX;
/*-------------------------------------------------------------------------*
* PixComp: compressed pix *
*-------------------------------------------------------------------------*/
/*! Compressed Pix */
struct PixComp
{
l_int32 w; /*!< width in pixels */
l_int32 h; /*!< height in pixels */
l_int32 d; /*!< depth in bits */
l_int32 xres; /*!< image res (ppi) in x direction */
/*!< (use 0 if unknown) */
l_int32 yres; /*!< image res (ppi) in y direction */
/*!< (use 0 if unknown) */
l_int32 comptype; /*!< compressed format (IFF_TIFF_G4, */
/*!< IFF_PNG, IFF_JFIF_JPEG) */
char *text; /*!< text string associated with pix */
l_int32 cmapflag; /*!< flag (1 for cmap, 0 otherwise) */
l_uint8 *data; /*!< the compressed image data */
size_t size; /*!< size of the data array */
};
typedef struct PixComp PIXC;
/*-------------------------------------------------------------------------*
* PixaComp: array of compressed pix *
*-------------------------------------------------------------------------*/
#define PIXACOMP_VERSION_NUMBER 2 /*!< Version for PixaComp serialization */
/*! Array of compressed pix */
struct PixaComp
{
l_int32 n; /*!< number of PixComp in ptr array */
l_int32 nalloc; /*!< number of PixComp ptrs allocated */
l_int32 offset; /*!< indexing offset into ptr array */
struct PixComp **pixc; /*!< the array of ptrs to PixComp */
struct Boxa *boxa; /*!< array of boxes */
};
typedef struct PixaComp PIXAC;
/*-------------------------------------------------------------------------*
* Access and storage flags *
*-------------------------------------------------------------------------*/
/*
* <pre>
* For Pix, Box, Pta and Numa, there are 3 standard methods for handling
* the retrieval or insertion of a struct:
* (1) direct insertion (Don't do this if there is another handle
* somewhere to this same struct!)
* (2) copy (Always safe, sets up a refcount of 1 on the new object.
* Can be undesirable if very large, such as an image or
* an array of images.)
* (3) clone (Makes another handle to the same struct, and bumps the
* refcount up by 1. Safe to do unless you're changing
* data through one of the handles but don't want those
* changes to be seen by the other handle.)
*
* For Pixa and Boxa, which are structs that hold an array of clonable
* structs, there is an additional method:
* (4) copy-clone (Makes a new higher-level struct with a refcount
* of 1, but clones all the structs in the array.)
*
* Unlike the other structs, when retrieving a string from an Sarray,
* you are allowed to get a handle without a copy or clone (i.e., that
* you don't own!). You must not free or insert such a string!
* Specifically, for an Sarray, the copyflag for retrieval is either:
* L_COPY or L_NOCOPY
* and for insertion, the copyflag is either:
* L_COPY or one of {L_INSERT , L_NOCOPY} (the latter are equivalent
* for insertion))
* </pre>
*/
/*! Access and storage flags */
enum {
L_NOCOPY = 0, /*!< do not copy the object; do not delete the ptr */
L_COPY = 1, /*!< make/use a copy of the object */
L_CLONE = 2, /*!< make/use clone (ref count) of the object */
L_COPY_CLONE = 3 /*!< make a new object and fill each object in the */
/*!< array(s) with clones */
};
static const l_int32 L_INSERT = 0; /*!< stuff it in; no copy or clone */
/*----------------------------------------------------------------------------*
* Sort flags *
*----------------------------------------------------------------------------*/
/*! Sort mode flags */
enum {
L_SHELL_SORT = 1, /*!< use shell sort */
L_BIN_SORT = 2 /*!< use bin sort */
};
/*! Sort order flags */
enum {
L_SORT_INCREASING = 1, /*!< sort in increasing order */
L_SORT_DECREASING = 2 /*!< sort in decreasing order */
};
/*! Sort type flags */
enum {
L_SORT_BY_X = 1, /*!< sort box or c.c. by left edge location */
L_SORT_BY_Y = 2, /*!< sort box or c.c. by top edge location */
L_SORT_BY_RIGHT = 3, /*!< sort box or c.c. by right edge location */
L_SORT_BY_BOT = 4, /*!< sort box or c.c. by bot edge location */
L_SORT_BY_WIDTH = 5, /*!< sort box or c.c. by width */
L_SORT_BY_HEIGHT = 6, /*!< sort box or c.c. by height */
L_SORT_BY_MIN_DIMENSION = 7, /*!< sort box or c.c. by min dimension */
L_SORT_BY_MAX_DIMENSION = 8, /*!< sort box or c.c. by max dimension */
L_SORT_BY_PERIMETER = 9, /*!< sort box or c.c. by perimeter */
L_SORT_BY_AREA = 10, /*!< sort box or c.c. by area */
L_SORT_BY_ASPECT_RATIO = 11 /*!< sort box or c.c. by width/height ratio */
};
/*---------------------------------------------------------------------------*
* Blend flags *
*---------------------------------------------------------------------------*/
/*! Blend flags */
enum {
L_BLEND_WITH_INVERSE = 1, /*!< add some of src inverse to itself */
L_BLEND_TO_WHITE = 2, /*!< shift src colors towards white */
L_BLEND_TO_BLACK = 3, /*!< shift src colors towards black */
L_BLEND_GRAY = 4, /*!< blend src directly with blender */
L_BLEND_GRAY_WITH_INVERSE = 5 /*!< add amount of src inverse to itself, */
/*!< based on blender pix value */
};
enum {
L_PAINT_LIGHT = 1, /*!< colorize non-black pixels */
L_PAINT_DARK = 2 /*!< colorize non-white pixels */
};
/*-------------------------------------------------------------------------*
* Graphics pixel setting *
*-------------------------------------------------------------------------*/
/*! Graphics pixel setting */
enum {
L_SET_PIXELS = 1, /*!< set all bits in each pixel to 1 */
L_CLEAR_PIXELS = 2, /*!< set all bits in each pixel to 0 */
L_FLIP_PIXELS = 3 /*!< flip all bits in each pixel */
};
/*-------------------------------------------------------------------------*
* Size and location filter flags *
*-------------------------------------------------------------------------*/
/*! Location filter flags */
enum {
L_SELECT_WIDTH = 1, /*!< width must satisfy constraint */
L_SELECT_HEIGHT = 2, /*!< height must satisfy constraint */
L_SELECT_XVAL = 3, /*!< x value satisfy constraint */
L_SELECT_YVAL = 4, /*!< y value must satisfy constraint */
L_SELECT_IF_EITHER = 5, /*!< either width or height (or xval */
/*!< or yval) can satisfy */
L_SELECT_IF_BOTH = 6 /*!< both width and height (or xval */
/*!< and yval must satisfy */
};
/*! Size filter flags */
enum {
L_SELECT_IF_LT = 1, /*!< save if value is less than threshold */
L_SELECT_IF_GT = 2, /*!< save if value is more than threshold */
L_SELECT_IF_LTE = 3, /*!< save if value is <= to the threshold */
L_SELECT_IF_GTE = 4 /*!< save if value is >= to the threshold */
};
/*-------------------------------------------------------------------------*
* Color component selection flags *
*-------------------------------------------------------------------------*/
/*! Color component selection flags */
enum {
L_SELECT_RED = 1, /*!< use red component */
L_SELECT_GREEN = 2, /*!< use green component */
L_SELECT_BLUE = 3, /*!< use blue component */
L_SELECT_MIN = 4, /*!< use min color component */
L_SELECT_MAX = 5, /*!< use max color component */
L_SELECT_AVERAGE = 6, /*!< use average of color components */
L_SELECT_HUE = 7, /*!< use hue value (in HSV color space) */
L_SELECT_SATURATION = 8 /*!< use saturation value (in HSV space) */
};
/*-------------------------------------------------------------------------*
* 16-bit conversion flags *
*-------------------------------------------------------------------------*/
/*! 16-bit conversion flags */
enum {
L_LS_BYTE = 1, /*!< use LSB */
L_MS_BYTE = 2, /*!< use MSB */
L_AUTO_BYTE = 3, /*!< use LSB if max(val) < 256; else MSB */
L_CLIP_TO_FF = 4, /*!< use max(val, 255) */
L_LS_TWO_BYTES = 5, /*!< use two LSB */
L_MS_TWO_BYTES = 6, /*!< use two MSB */
L_CLIP_TO_FFFF = 7 /*!< use max(val, 65535) */
};
/*-------------------------------------------------------------------------*
* Rotate and shear flags *
*-------------------------------------------------------------------------*/
/*! Rotate flags */
enum {
L_ROTATE_AREA_MAP = 1, /*!< use area map rotation, if possible */
L_ROTATE_SHEAR = 2, /*!< use shear rotation */
L_ROTATE_SAMPLING = 3 /*!< use sampling */
};
/*! Background flags */
enum {
L_BRING_IN_WHITE = 1, /*!< bring in white pixels from the outside */
L_BRING_IN_BLACK = 2 /*!< bring in black pixels from the outside */
};
/*! Shear flags */
enum {
L_SHEAR_ABOUT_CORNER = 1, /*!< shear image about UL corner */
L_SHEAR_ABOUT_CENTER = 2 /*!< shear image about center */
};
/*-------------------------------------------------------------------------*
* Affine transform order flags *
*-------------------------------------------------------------------------*/
/*! Affine transform order flags */
enum {
L_TR_SC_RO = 1, /*!< translate, scale, rotate */
L_SC_RO_TR = 2, /*!< scale, rotate, translate */
L_RO_TR_SC = 3, /*!< rotate, translate, scale */
L_TR_RO_SC = 4, /*!< translate, rotate, scale */
L_RO_SC_TR = 5, /*!< rotate, scale, translate */
L_SC_TR_RO = 6 /*!< scale, translate, rotate */
};
/*-------------------------------------------------------------------------*
* Grayscale filling flags *
*-------------------------------------------------------------------------*/
/*! Grayscale filling flags */
enum {
L_FILL_WHITE = 1, /*!< fill white pixels (e.g, in fg map) */
L_FILL_BLACK = 2 /*!< fill black pixels (e.g., in bg map) */
};
/*-------------------------------------------------------------------------*
* Flags for setting to white or black *
*-------------------------------------------------------------------------*/
/*! Flags for setting to white or black */
enum {
L_SET_WHITE = 1, /*!< set pixels to white */
L_SET_BLACK = 2 /*!< set pixels to black */
};
/*-------------------------------------------------------------------------*
* Flags for getting white or black value *
*-------------------------------------------------------------------------*/
/*! Flags for getting white or black value */
enum {
L_GET_WHITE_VAL = 1, /*!< get white pixel value */
L_GET_BLACK_VAL = 2 /*!< get black pixel value */
};
/*-------------------------------------------------------------------------*
* Flags for 8 bit and 16 bit pixel sums *
*-------------------------------------------------------------------------*/
/*! Flags for 8 bit and 16 bit pixel sums */
enum {
L_WHITE_IS_MAX = 1, /*!< white pixels are 0xff or 0xffff; black are 0 */
L_BLACK_IS_MAX = 2 /*!< black pixels are 0xff or 0xffff; white are 0 */
};
/*-------------------------------------------------------------------------*
* Dither parameters *
* If within this grayscale distance from black or white, *
* do not propagate excess or deficit to neighboring pixels. *
*-------------------------------------------------------------------------*/
/*! Dither parameters */
enum {
DEFAULT_CLIP_LOWER_1 = 10, /*!< dist to black with no prop; 1 bpp */
DEFAULT_CLIP_UPPER_1 = 10, /*!< dist to black with no prop; 1 bpp */
DEFAULT_CLIP_LOWER_2 = 5, /*!< dist to black with no prop; 2 bpp */
DEFAULT_CLIP_UPPER_2 = 5 /*!< dist to black with no prop; 2 bpp */
};
/*-------------------------------------------------------------------------*
* Distance flags *
*-------------------------------------------------------------------------*/
/*! Distance flags */
enum {
L_MANHATTAN_DISTANCE = 1, /*!< L1 distance (e.g., in color space) */
L_EUCLIDEAN_DISTANCE = 2 /*!< L2 distance */
};
/*-------------------------------------------------------------------------*
* Value flags *
*-------------------------------------------------------------------------*/
/*! Value flags */
enum {
L_NEGATIVE = 1, /*!< values < 0 */
L_NON_NEGATIVE = 2, /*!< values >= 0 */
L_POSITIVE = 3, /*!< values > 0 */
L_NON_POSITIVE = 4, /*!< values <= 0 */
L_ZERO = 5, /*!< values = 0 */
L_ALL = 6 /*!< all values */
};
/*-------------------------------------------------------------------------*
* Statistical measures *
*-------------------------------------------------------------------------*/
/*! Statistical measures */
enum {
L_MEAN_ABSVAL = 1, /*!< average of abs values */
L_MEDIAN_VAL = 2, /*!< median value of set */
L_MODE_VAL = 3, /*!< mode value of set */
L_MODE_COUNT = 4, /*!< mode count of set */
L_ROOT_MEAN_SQUARE = 5, /*!< rms of values */
L_STANDARD_DEVIATION = 6, /*!< standard deviation from mean */
L_VARIANCE = 7 /*!< variance of values */
};
/*-------------------------------------------------------------------------*
* Set selection flags *
*-------------------------------------------------------------------------*/
/*! Set selection flags */
enum {
L_CHOOSE_CONSECUTIVE = 1, /*!< select 'n' consecutive */
L_CHOOSE_SKIP_BY = 2 /*!< select at intervals of 'n' */
};
/*-------------------------------------------------------------------------*
* Text orientation flags *
*-------------------------------------------------------------------------*/
/*! Text orientation flags */
enum {
L_TEXT_ORIENT_UNKNOWN = 0, /*!< low confidence on text orientation */
L_TEXT_ORIENT_UP = 1, /*!< portrait, text rightside-up */
L_TEXT_ORIENT_LEFT = 2, /*!< landscape, text up to left */
L_TEXT_ORIENT_DOWN = 3, /*!< portrait, text upside-down */
L_TEXT_ORIENT_RIGHT = 4 /*!< landscape, text up to right */
};
/*-------------------------------------------------------------------------*
* Edge orientation flags *
*-------------------------------------------------------------------------*/
/*! Edge orientation flags */
enum {
L_HORIZONTAL_EDGES = 0, /*!< filters for horizontal edges */
L_VERTICAL_EDGES = 1, /*!< filters for vertical edges */
L_ALL_EDGES = 2 /*!< filters for all edges */
};
/*-------------------------------------------------------------------------*
* Line orientation flags *
*-------------------------------------------------------------------------*/
/*! Line orientation flags */
enum {
L_HORIZONTAL_LINE = 0, /*!< horizontal line */
L_POS_SLOPE_LINE = 1, /*!< 45 degree line with positive slope */
L_VERTICAL_LINE = 2, /*!< vertical line */
L_NEG_SLOPE_LINE = 3, /*!< 45 degree line with negative slope */
L_OBLIQUE_LINE = 4 /*!< neither horizontal nor vertical */
};
/*-------------------------------------------------------------------------*
* Image orientation flags *
*-------------------------------------------------------------------------*/
/*! Image orientation flags */
enum {
L_PORTRAIT_MODE = 0, /*!< typical: page is viewed with height > width */
L_LANDSCAPE_MODE = 1 /*!< page is viewed at 90 deg to portrait mode */
};
/*-------------------------------------------------------------------------*
* Scan direction flags *
*-------------------------------------------------------------------------*/
/*! Scan direction flags */
enum {
L_FROM_LEFT = 0, /*!< scan from left */
L_FROM_RIGHT = 1, /*!< scan from right */
L_FROM_TOP = 2, /*!< scan from top */
L_FROM_BOT = 3, /*!< scan from bottom */
L_SCAN_NEGATIVE = 4, /*!< scan in negative direction */
L_SCAN_POSITIVE = 5, /*!< scan in positive direction */
L_SCAN_BOTH = 6, /*!< scan in both directions */
L_SCAN_HORIZONTAL = 7, /*!< horizontal scan (direction unimportant) */
L_SCAN_VERTICAL = 8 /*!< vertical scan (direction unimportant) */
};
/*-------------------------------------------------------------------------*
* Box size adjustment and location flags *
*-------------------------------------------------------------------------*/
/*! Box size adjustment and location flags */
enum {
L_ADJUST_SKIP = 0, /*!< do not adjust */
L_ADJUST_LEFT = 1, /*!< adjust left edge */
L_ADJUST_RIGHT = 2, /*!< adjust right edge */
L_ADJUST_LEFT_AND_RIGHT = 3, /*!< adjust both left and right edges */
L_ADJUST_TOP = 4, /*!< adjust top edge */
L_ADJUST_BOT = 5, /*!< adjust bottom edge */
L_ADJUST_TOP_AND_BOT = 6, /*!< adjust both top and bottom edges */
L_ADJUST_CHOOSE_MIN = 7, /*!< choose the min median value */
L_ADJUST_CHOOSE_MAX = 8, /*!< choose the max median value */
L_SET_LEFT = 9, /*!< set left side to a given value */
L_SET_RIGHT = 10, /*!< set right side to a given value */
L_SET_TOP = 11, /*!< set top side to a given value */
L_SET_BOT = 12, /*!< set bottom side to a given value */
L_GET_LEFT = 13, /*!< get left side location */
L_GET_RIGHT = 14, /*!< get right side location */
L_GET_TOP = 15, /*!< get top side location */
L_GET_BOT = 16 /*!< get bottom side location */
};
/*-------------------------------------------------------------------------*
* Flags for modifying box boundaries using a second box *
*-------------------------------------------------------------------------*/
/*! Flags for modifying box boundaries using a second box */
enum {
L_USE_MINSIZE = 1, /*!< use boundaries giving min size */
L_USE_MAXSIZE = 2, /*!< use boundaries giving max size */
L_SUB_ON_LOC_DIFF = 3, /*!< modify boundary if big location diff */
L_SUB_ON_SIZE_DIFF = 4, /*!< modify boundary if big size diff */
L_USE_CAPPED_MIN = 5, /*!< modify boundary with capped min */
L_USE_CAPPED_MAX = 6 /*!< modify boundary with capped max */
};
/*-------------------------------------------------------------------------*
* Handling overlapping bounding boxes in boxa *
*-------------------------------------------------------------------------*/
/*! Handling overlapping bounding boxes in Boxa */
enum {
L_COMBINE = 1, /*!< resize to bounding region; remove smaller */
L_REMOVE_SMALL = 2 /*!< only remove smaller */
};
/*-------------------------------------------------------------------------*
* Flags for replacing invalid boxes *
*-------------------------------------------------------------------------*/
/*! Flags for replacing invalid boxes */
enum {
L_USE_ALL_BOXES = 1, /*!< consider all boxes in the sequence */
L_USE_SAME_PARITY_BOXES = 2 /*!< consider boxes with the same parity */
};
/*-------------------------------------------------------------------------*
* Horizontal warp *
*-------------------------------------------------------------------------*/
/*! Horizonal warp direction */
enum {
L_WARP_TO_LEFT = 1, /*!< increasing stretch or contraction to left */
L_WARP_TO_RIGHT = 2 /*!< increasing stretch or contraction to right */
};
/*! Horizonal warp stretch mode */
enum {
L_LINEAR_WARP = 1, /*!< stretch or contraction grows linearly */
L_QUADRATIC_WARP = 2 /*!< stretch or contraction grows quadratically */
};
/*-------------------------------------------------------------------------*
* Pixel selection for resampling *
*-------------------------------------------------------------------------*/
/*! Pixel selection for resampling */
enum {
L_INTERPOLATED = 1, /*!< linear interpolation from src pixels */
L_SAMPLED = 2 /*!< nearest src pixel sampling only */
};
/*-------------------------------------------------------------------------*
* Thinning flags *
*-------------------------------------------------------------------------*/
/*! Thinning flags */
enum {
L_THIN_FG = 1, /*!< thin foreground of 1 bpp image */
L_THIN_BG = 2 /*!< thin background of 1 bpp image */
};
/*-------------------------------------------------------------------------*
* Runlength flags *
*-------------------------------------------------------------------------*/
/*! Runlength flags */
enum {
L_HORIZONTAL_RUNS = 0, /*!< determine runlengths of horizontal runs */
L_VERTICAL_RUNS = 1 /*!< determine runlengths of vertical runs */
};
/*-------------------------------------------------------------------------*
* Edge filter flags *
*-------------------------------------------------------------------------*/
/*! Edge filter flags */
enum {
L_SOBEL_EDGE = 1, /*!< Sobel edge filter */
L_TWO_SIDED_EDGE = 2 /*!< Two-sided edge filter */
};
/*-------------------------------------------------------------------------*
* Subpixel color component ordering in LCD display *
*-------------------------------------------------------------------------*/
/*! Subpixel color component ordering in LC display */
enum {
L_SUBPIXEL_ORDER_RGB = 1, /*!< sensor order left-to-right RGB */
L_SUBPIXEL_ORDER_BGR = 2, /*!< sensor order left-to-right BGR */
L_SUBPIXEL_ORDER_VRGB = 3, /*!< sensor order top-to-bottom RGB */
L_SUBPIXEL_ORDER_VBGR = 4 /*!< sensor order top-to-bottom BGR */
};
/*-------------------------------------------------------------------------*
* HSV histogram flags *
*-------------------------------------------------------------------------*/
/*! HSV histogram flags */
enum {
L_HS_HISTO = 1, /*!< Use hue-saturation histogram */
L_HV_HISTO = 2, /*!< Use hue-value histogram */
L_SV_HISTO = 3 /*!< Use saturation-value histogram */
};
/*-------------------------------------------------------------------------*
* Region flags (inclusion, exclusion) *
*-------------------------------------------------------------------------*/
/*! Region flags (inclusion, exclusion) */
enum {
L_INCLUDE_REGION = 1, /*!< Use hue-saturation histogram */
L_EXCLUDE_REGION = 2 /*!< Use hue-value histogram */
};
/*-------------------------------------------------------------------------*
* Flags for adding text to a pix *
*-------------------------------------------------------------------------*/
/*! Flags for adding text to a Pix */
enum {
L_ADD_ABOVE = 1, /*!< Add text above the image */
L_ADD_BELOW = 2, /*!< Add text below the image */
L_ADD_LEFT = 3, /*!< Add text to the left of the image */
L_ADD_RIGHT = 4, /*!< Add text to the right of the image */
L_ADD_AT_TOP = 5, /*!< Add text over the top of the image */
L_ADD_AT_BOT = 6, /*!< Add text over the bottom of the image */
L_ADD_AT_LEFT = 7, /*!< Add text over left side of the image */
L_ADD_AT_RIGHT = 8 /*!< Add text over right side of the image */
};
/*-------------------------------------------------------------------------*
* Flags for plotting on a pix *
*-------------------------------------------------------------------------*/
/*! Flags for plotting on a Pix */
enum {
L_PLOT_AT_TOP = 1, /*!< Plot horizontally at top */
L_PLOT_AT_MID_HORIZ = 2, /*!< Plot horizontally at middle */
L_PLOT_AT_BOT = 3, /*!< Plot horizontally at bottom */
L_PLOT_AT_LEFT = 4, /*!< Plot vertically at left */
L_PLOT_AT_MID_VERT = 5, /*!< Plot vertically at middle */
L_PLOT_AT_RIGHT = 6 /*!< Plot vertically at right */
};
/*-------------------------------------------------------------------------*
* Flags for selecting display program *
*-------------------------------------------------------------------------*/
/*! Flags for selecting display program */
enum {
L_DISPLAY_WITH_XZGV = 1, /*!< Use xzgv with pixDisplay() */
L_DISPLAY_WITH_XLI = 2, /*!< Use xli with pixDisplay() */
L_DISPLAY_WITH_XV = 3, /*!< Use xv with pixDisplay() */
L_DISPLAY_WITH_IV = 4, /*!< Use irfvanview (win) with pixDisplay() */
L_DISPLAY_WITH_OPEN = 5 /*!< Use open (apple) with pixDisplay() */
};
/*-------------------------------------------------------------------------*
* Flag(s) used in the 'special' pix field for non-default operations *
* - 0 is default for chroma sampling in jpeg *
* - 10-19 are used for zlib compression in png write *
* - 4 and 8 are used for specifying connectivity in labelling *
*-------------------------------------------------------------------------*/
/*! Flags used in Pix::special */
enum {
L_NO_CHROMA_SAMPLING_JPEG = 1 /*!< Write full resolution chroma */
};
/*-------------------------------------------------------------------------*
* Handling negative values in conversion to unsigned int *
*-------------------------------------------------------------------------*/
/*! Handling negative values in conversion to unsigned int */
enum {
L_CLIP_TO_ZERO = 1, /*!< Clip negative values to 0 */
L_TAKE_ABSVAL = 2 /*!< Convert to positive using L_ABS() */
};
/*-------------------------------------------------------------------------*
* Relative to zero flags *
*-------------------------------------------------------------------------*/
/*! Relative to zero flags */
enum {
L_LESS_THAN_ZERO = 1, /*!< Choose values less than zero */
L_EQUAL_TO_ZERO = 2, /*!< Choose values equal to zero */
L_GREATER_THAN_ZERO = 3 /*!< Choose values greater than zero */
};
/*-------------------------------------------------------------------------*
* Flags for adding or removing traling slash from string *
*-------------------------------------------------------------------------*/
/*! Flags for adding or removing traling slash from string */
enum {
L_ADD_TRAIL_SLASH = 1, /*!< Add trailing slash to string */
L_REMOVE_TRAIL_SLASH = 2 /*!< Remove trailing slash from string */
};
/*-------------------------------------------------------------------------*
* Pix allocator and deallocator function types *
*-------------------------------------------------------------------------*/
/*! Allocator function type */
typedef void *(*alloc_fn)(size_t);
/*! Deallocator function type */
typedef void (*dealloc_fn)(void *);
#endif /* LEPTONICA_PIX_H */
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