/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2006 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */

/** \file DNA_color_types.h
 *  \ingroup DNA
 */

#ifndef __DNA_COLOR_TYPES_H__
#define __DNA_COLOR_TYPES_H__

#include "DNA_vec_types.h"

/* general defines for kernel functions */
#define CM_RESOL 32
#define CM_TABLE 256
#define CM_TABLEDIV		(1.0f/256.0f)

#define CM_TOT	4

typedef struct CurveMapPoint {
	float x, y;
	short flag, shorty;		/* shorty for result lookup */
} CurveMapPoint;

/* curvepoint->flag */
#define CUMA_SELECT		1
#define CUMA_VECTOR		2

typedef struct CurveMap {
	short totpoint, flag;
	
	float range;					/* quick multiply value for reading table */
	float mintable, maxtable;		/* the x-axis range for the table */
	float ext_in[2], ext_out[2];	/* for extrapolated curves, the direction vector */
	CurveMapPoint *curve;			/* actual curve */
	CurveMapPoint *table;			/* display and evaluate table */
	CurveMapPoint *premultable;		/* for RGB curves, premulled table */
} CurveMap;

/* cuma->flag */
#define CUMA_EXTEND_EXTRAPOLATE	1

typedef struct CurveMapping {
	int flag, cur;					/* cur; for buttons, to show active curve */
	int preset;
	int changed_timestamp;
	
	rctf curr, clipr;				/* current rect, clip rect (is default rect too) */
	
	CurveMap cm[4];					/* max 4 builtin curves per mapping struct now */
	float black[3], white[3];		/* black/white point (black[0] abused for current frame) */
	float bwmul[3];					/* black/white point multiply value, for speed */
	
	float sample[3];				/* sample values, if flag set it draws line and intersection */
} CurveMapping;

/* cumapping->flag */
#define CUMA_DO_CLIP			1
#define CUMA_PREMULLED			2
#define CUMA_DRAW_CFRA			4
#define CUMA_DRAW_SAMPLE		8

/* cumapping->preset */
typedef enum CurveMappingPreset {
	CURVE_PRESET_LINE   = 0,
	CURVE_PRESET_SHARP  = 1,
	CURVE_PRESET_SMOOTH = 2,
	CURVE_PRESET_MAX    = 3,
	CURVE_PRESET_MID9   = 4,
	CURVE_PRESET_ROUND  = 5,
	CURVE_PRESET_ROOT   = 6,
} CurveMappingPreset;

/* histogram->mode */
enum {
	HISTO_MODE_LUMA   = 0,
	HISTO_MODE_RGB    = 1,
	HISTO_MODE_R      = 2,
	HISTO_MODE_G      = 3,
	HISTO_MODE_B      = 4,
	HISTO_MODE_ALPHA  = 5
};

enum {
	HISTO_FLAG_LINE        = (1 << 0),
	HISTO_FLAG_SAMPLELINE  = (1 << 1)
};

typedef struct Histogram {
	int channels;
	int x_resolution;
	float data_luma[256];
	float data_r[256];
	float data_g[256];
	float data_b[256];
	float data_a[256];
	float xmax, ymax;
	short mode;
	short flag;
	int height;

	/* sample line only */
	/* image coords src -> dst */
	float co[2][2];
} Histogram;

struct ImBuf;

typedef struct Scopes {
	int ok;
	int sample_full;
	int sample_lines;
	float accuracy;
	int wavefrm_mode;
	float wavefrm_alpha;
	float wavefrm_yfac;
	int wavefrm_height;
	float vecscope_alpha;
	int vecscope_height;
	float minmax[3][2];
	struct Histogram hist;
	float *waveform_1;
	float *waveform_2;
	float *waveform_3;
	float *vecscope;
	int waveform_tot;
	int pad;
} Scopes;

/* scopes->wavefrm_mode */
#define SCOPES_WAVEFRM_LUMA		0
#define SCOPES_WAVEFRM_RGB		1
#define SCOPES_WAVEFRM_YCC_601	2
#define SCOPES_WAVEFRM_YCC_709	3
#define SCOPES_WAVEFRM_YCC_JPEG	4


#endif