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/*
* "$Id: color-conversion.h,v 1.12 2008/01/21 23:19:39 rlk Exp $"
*
* Gutenprint color management module - traditional Gimp-Print algorithm.
*
* Copyright 1997-2000 Michael Sweet (mike@easysw.com) and
* Robert Krawitz (rlk@alum.mit.edu)
*
* This program 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; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef GUTENPRINT_INTERNAL_COLOR_CONVERSION_H
#define GUTENPRINT_INTERNAL_COLOR_CONVERSION_H
#ifdef __cplusplus
extern "C" {
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gutenprint/gutenprint.h>
#include <gutenprint/curve-cache.h>
typedef enum
{
COLOR_CORRECTION_DEFAULT,
COLOR_CORRECTION_UNCORRECTED,
COLOR_CORRECTION_BRIGHT,
COLOR_CORRECTION_HUE,
COLOR_CORRECTION_ACCURATE,
COLOR_CORRECTION_THRESHOLD,
COLOR_CORRECTION_DESATURATED,
COLOR_CORRECTION_DENSITY,
COLOR_CORRECTION_RAW,
COLOR_CORRECTION_PREDITHERED
} color_correction_enum_t;
typedef struct
{
const char *name;
const char *text;
color_correction_enum_t correction;
int correct_hsl;
} color_correction_t;
typedef enum
{
COLOR_WHITE, /* RGB */
COLOR_BLACK, /* CMY */
COLOR_UNKNOWN /* Printer-specific uninterpreted */
} color_model_t;
#define CHANNEL_K 0
#define CHANNEL_C 1
#define CHANNEL_M 2
#define CHANNEL_Y 3
#define CHANNEL_W 4
#define CHANNEL_R 5
#define CHANNEL_G 6
#define CHANNEL_B 7
#define CHANNEL_MAX 8
#define CMASK_K (1 << CHANNEL_K)
#define CMASK_C (1 << CHANNEL_C)
#define CMASK_M (1 << CHANNEL_M)
#define CMASK_Y (1 << CHANNEL_Y)
#define CMASK_W (1 << CHANNEL_W)
#define CMASK_R (1 << CHANNEL_R)
#define CMASK_G (1 << CHANNEL_G)
#define CMASK_B (1 << CHANNEL_B)
#define CMASK_RAW (1 << CHANNEL_MAX)
typedef struct
{
unsigned channel_id;
const char *gamma_name;
const char *curve_name;
const char *rgb_gamma_name;
const char *rgb_curve_name;
} channel_param_t;
/* Color conversion function */
typedef unsigned (*stp_convert_t)(const stp_vars_t *vars,
const unsigned char *in,
unsigned short *out);
#define CMASK_NONE (0)
#define CMASK_RGB (CMASK_R | CMASK_G | CMASK_B)
#define CMASK_CMY (CMASK_C | CMASK_M | CMASK_Y)
#define CMASK_CMYK (CMASK_CMY | CMASK_K)
#define CMASK_ALL (CMASK_CMYK | CMASK_RGB | CMASK_W)
#define CMASK_EVERY (CMASK_ALL | CMASK_RAW)
typedef enum
{
COLOR_ID_GRAY,
COLOR_ID_WHITE,
COLOR_ID_RGB,
COLOR_ID_CMY,
COLOR_ID_CMYK,
COLOR_ID_KCMY,
COLOR_ID_RAW
} color_id_t;
typedef struct
{
const char *name;
int input;
int output;
color_id_t color_id;
color_model_t color_model;
unsigned channels;
int channel_count;
color_correction_enum_t default_correction;
stp_convert_t conversion_function;
} color_description_t;
typedef struct
{
const char *name;
size_t bits;
} channel_depth_t;
typedef struct
{
unsigned steps;
int channel_depth;
int image_width;
int in_channels;
int out_channels;
int channels_are_initialized;
int invert_output;
const color_description_t *input_color_description;
const color_description_t *output_color_description;
const color_correction_t *color_correction;
stp_cached_curve_t brightness_correction;
stp_cached_curve_t contrast_correction;
stp_cached_curve_t user_color_correction;
stp_cached_curve_t channel_curves[STP_CHANNEL_LIMIT];
double gamma_values[STP_CHANNEL_LIMIT];
double print_gamma;
double app_gamma;
double screen_gamma;
double contrast;
double brightness;
int linear_contrast_adjustment;
int printed_colorfunc;
int simple_gamma_correction;
stp_cached_curve_t hue_map;
stp_cached_curve_t lum_map;
stp_cached_curve_t sat_map;
unsigned short *gray_tmp; /* Color -> Gray */
unsigned short *cmy_tmp; /* CMY -> CMYK */
unsigned char *in_data;
} lut_t;
extern unsigned stpi_color_convert_to_gray(const stp_vars_t *v,
const unsigned char *,
unsigned short *);
extern unsigned stpi_color_convert_to_color(const stp_vars_t *v,
const unsigned char *,
unsigned short *);
extern unsigned stpi_color_convert_to_kcmy(const stp_vars_t *v,
const unsigned char *,
unsigned short *);
extern unsigned stpi_color_convert_raw(const stp_vars_t *v,
const unsigned char *,
unsigned short *);
#ifdef __cplusplus
}
#endif
#endif /* GUTENPRINT_INTERNAL_COLOR_CONVERSION_H */
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