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/* quirc -- QR-code recognition library
* Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef QUIRC_INTERNAL_H_
#define QUIRC_INTERNAL_H_
#include <assert.h>
#include <stdlib.h>
#include "quirc.h"
#define QUIRC_ASSERT(a) assert(a)
#define QUIRC_PIXEL_WHITE 0
#define QUIRC_PIXEL_BLACK 1
#define QUIRC_PIXEL_REGION 2
#ifndef QUIRC_MAX_REGIONS
#define QUIRC_MAX_REGIONS 254
#endif
#define QUIRC_MAX_CAPSTONES 32
#define QUIRC_MAX_GRIDS (QUIRC_MAX_CAPSTONES * 2)
#define QUIRC_PERSPECTIVE_PARAMS 8
#if QUIRC_MAX_REGIONS < UINT8_MAX
#define QUIRC_PIXEL_ALIAS_IMAGE 1
typedef uint8_t quirc_pixel_t;
#elif QUIRC_MAX_REGIONS < UINT16_MAX
#define QUIRC_PIXEL_ALIAS_IMAGE 0
typedef uint16_t quirc_pixel_t;
#else
#error "QUIRC_MAX_REGIONS > 65534 is not supported"
#endif
#ifdef QUIRC_FLOAT_TYPE
/* Quirc uses double precision floating point internally by default.
* On platforms with a single precision FPU but no double precision FPU,
* this can be changed to float by defining QUIRC_FLOAT_TYPE.
*
* When setting QUIRC_FLOAT_TYPE to 'float', consider also defining QUIRC_USE_TGMATH.
* This will use the type-generic math functions (tgmath.h, C99 or later) instead of the normal ones,
* which will allow the compiler to use the correct overloaded functions for the type.
*/
typedef QUIRC_FLOAT_TYPE quirc_float_t;
#else
typedef double quirc_float_t;
#endif
struct quirc_region {
struct quirc_point seed;
int count;
int capstone;
};
struct quirc_capstone {
int ring;
int stone;
struct quirc_point corners[4];
struct quirc_point center;
quirc_float_t c[QUIRC_PERSPECTIVE_PARAMS];
int qr_grid;
};
struct quirc_grid {
/* Capstone indices */
int caps[3];
/* Alignment pattern region and corner */
int align_region;
struct quirc_point align;
/* Timing pattern endpoints */
struct quirc_point tpep[3];
/* Grid size and perspective transform */
int grid_size;
quirc_float_t c[QUIRC_PERSPECTIVE_PARAMS];
};
struct quirc_flood_fill_vars {
int y;
int right;
int left_up;
int left_down;
};
struct quirc {
uint8_t *image;
quirc_pixel_t *pixels;
int w;
int h;
int num_regions;
struct quirc_region regions[QUIRC_MAX_REGIONS];
int num_capstones;
struct quirc_capstone capstones[QUIRC_MAX_CAPSTONES];
int num_grids;
struct quirc_grid grids[QUIRC_MAX_GRIDS];
size_t num_flood_fill_vars;
struct quirc_flood_fill_vars *flood_fill_vars;
};
/************************************************************************
* QR-code version information database
*/
#define QUIRC_MAX_VERSION 40
#define QUIRC_MAX_ALIGNMENT 7
struct quirc_rs_params {
int bs; /* Small block size */
int dw; /* Small data words */
int ns; /* Number of small blocks */
};
struct quirc_version_info {
int data_bytes;
int apat[QUIRC_MAX_ALIGNMENT];
struct quirc_rs_params ecc[4];
};
extern const struct quirc_version_info quirc_version_db[QUIRC_MAX_VERSION + 1];
#endif
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