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/*
* This file is part of Unpaper.
*
* Copyright © 2005-2007 Jens Gulden
* Copyright © 2011-2011 Diego Elio Pettenò
*
* Unpaper is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* Unpaper is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/* --- global declarations ------------------------------------------------ */
#if HAVE_STDBOOL_H
# include <stdbool.h>
#else
typedef enum {
FALSE,
TRUE
} BOOLEAN;
# define bool BOOLEAN
# define false FALSE
# define true TRUE
#endif
/* --- preprocessor macros ------------------------------------------------ */
#define max(a, b) ( (a >= b) ? (a) : (b) )
#define pluralS(i) ( (i > 1) ? "s" : "" )
#define pixelValue(r, g, b) ( (r)<<16 | (g)<<8 | (b) )
#define pixelGrayscaleValue(g) ( (g)<<16 | (g)<<8 | (g) )
#define pixelGrayscale(r, g, b) ( ( ( r == g ) && ( r == b ) ) ? r : ( ( r + g + b ) / 3 ) ) // average (optimized for already gray values)
#define pixelLightness(r, g, b) ( r < g ? ( r < b ? r : b ) : ( g < b ? g : b ) ) // minimum
#define pixelDarknessInverse(r, g, b) ( r > g ? ( r > b ? r : b ) : ( g > b ? g : b ) ) // maximum
#define red(pixel) ( (pixel >> 16) & 0xff )
#define green(pixel) ( (pixel >> 8) & 0xff )
#define blue(pixel) ( pixel & 0xff )
/* --- preprocessor constants ---------------------------------------------- */
#define MAX_MULTI_INDEX 10000 // maximum pixel count of virtual line to detect rotation with
#define MAX_ROTATION_SCAN_SIZE 10000 // maximum pixel count of virtual line to detect rotation with
#define MAX_MASKS 100
#define MAX_POINTS 100
#define MAX_FILES 100
#define MAX_PAGES 2
#define WHITE 255
#define GRAY 127
#define BLACK 0
#define BLANK_TEXT "<blank>"
/* --- typedefs ----------------------------------------------------------- */
typedef enum {
VERBOSE_QUIET = -1,
VERBOSE_NONE = 0,
VERBOSE_NORMAL = 1,
VERBOSE_MORE = 2,
VERBOSE_DEBUG = 3,
VERBOSE_DEBUG_SAVE = 4
} VERBOSE_LEVEL;
typedef enum {
X,
Y,
COORDINATES_COUNT
} COORDINATES;
typedef enum {
WIDTH,
HEIGHT,
DIMENSIONS_COUNT
} DIMENSIONS;
typedef enum {
HORIZONTAL,
VERTICAL,
DIRECTIONS_COUNT
} DIRECTIONS;
typedef enum {
LEFT,
TOP,
RIGHT,
BOTTOM,
EDGES_COUNT
} EDGES;
typedef enum {
LAYOUT_NONE,
LAYOUT_SINGLE,
LAYOUT_DOUBLE,
LAYOUTS_COUNT
} LAYOUTS;
typedef enum {
BRIGHT,
DARK,
SHADINGS_COUNT
} SHADINGS;
typedef enum {
RED,
GREEN,
BLUE,
COLORCOMPONENTS_COUNT
} COLORCOMPONENTS;
typedef enum {
PBM,
PGM,
PPM,
FILETYPES_COUNT
} FILETYPES;
/* --- struct ------------------------------------------------------------- */
struct IMAGE {
uint8_t *buffer;
uint8_t *bufferGrayscale;
uint8_t *bufferLightness;
uint8_t *bufferDarknessInverse;
int width;
int height;
int bitdepth;
int background;
bool color;
};
void errOutput(const char *fmt, ...)
__attribute__((format(printf, 1, 2)))
__attribute__((noreturn));
/* --- global variable ---------------------------------------------------- */
extern VERBOSE_LEVEL verbose;
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