/*
 * ***** 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) 2008, Blender Foundation.
 * This is a new part of Blender
 *
 * Contributor(s): Joshua Leung, Antonio Vazquez
 *
 * ***** END GPL LICENSE BLOCK *****
 */

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

#ifndef __DNA_GPENCIL_TYPES_H__
#define __DNA_GPENCIL_TYPES_H__

#include "DNA_listBase.h"
#include "DNA_ID.h"
#include "DNA_brush_types.h"

struct AnimData;
struct CurveMapping;

/* Grease-Pencil Annotations - 'Stroke Point'
 *	-> Coordinates may either be 2d or 3d depending on settings at the time
 * 	-> Coordinates of point on stroke, in proportions of window size
 *	   This assumes that the bottom-left corner is (0,0)
 */
typedef struct bGPDspoint {
	float x, y, z;			/* co-ordinates of point (usually 2d, but can be 3d as well) */
	float pressure;			/* pressure of input device (from 0 to 1) at this point */
	float strength;			/* color strength (used for alpha factor) */
	float time;				/* seconds since start of stroke */
	int flag;				/* additional options (NOTE: can shrink this field down later if needed) */
} bGPDspoint;

/* bGPDspoint->flag */
typedef enum eGPDspoint_Flag {
	/* stroke point is selected (for editing) */
	GP_SPOINT_SELECT	= (1 << 0),
	
	/* stroke point is tagged (for some editing operation) */
	GP_SPOINT_TAG       = (1 << 1),
} eGPSPoint_Flag;

/* Grease-Pencil Annotations - 'Triangle'
 * A triangle contains the index of three vertices for filling the stroke
 * This is only used if high quality fill is enabled.
 * (not saved to blend file).
 */
typedef struct bGPDtriangle {
	/* indices for tesselated triangle used for GP Fill */
	unsigned int verts[3];
} bGPDtriangle;

/* GP brush (used for new strokes) */
typedef struct bGPDbrush {
	struct bGPDbrush *next, *prev;

	char info[64];            /* Brush name. Must be unique. */
	short thickness;          /* thickness to apply to strokes */
	short flag;
	float draw_smoothfac;     /* amount of smoothing to apply to newly created strokes */
	short draw_smoothlvl;     /* number of times to apply smooth factor to new strokes */
	short sublevel;           /* number of times to subdivide new strokes */

	float draw_sensitivity;   /* amount of sensivity to apply to newly created strokes */
	float draw_strength;      /* amount of alpha strength to apply to newly created strokes */
	float draw_jitter;        /* amount of jitter to apply to newly created strokes */
	float draw_angle;         /* angle when the brush has full thickness */
	float draw_angle_factor;  /* factor to apply when angle change (only 90 degrees) */
	float draw_random_press;  /* factor of randomness for sensitivity and strength */
	float draw_random_sub;    /* factor of randomness for subdivision */
	struct CurveMapping *cur_sensitivity;
	struct CurveMapping *cur_strength;
	struct CurveMapping *cur_jitter;
} bGPDbrush;

/* bGPDbrush->flag */
typedef enum eGPDbrush_Flag {
	/* brush is active */
	GP_BRUSH_ACTIVE = (1 << 0),
	/* brush use pressure */
	GP_BRUSH_USE_PRESSURE = (1 << 1),
	/* brush use pressure for alpha factor */
	GP_BRUSH_USE_STENGTH_PRESSURE = (1 << 2),
	/* brush use pressure for alpha factor */
	GP_BRUSH_USE_JITTER_PRESSURE = (1 << 3),
	/* brush use random for pressure */
	GP_BRUSH_USE_RANDOM_PRESSURE = (1 << 4),
	/* brush use random for strength */
	GP_BRUSH_USE_RANDOM_STRENGTH = (1 << 5)
} eGPDbrush_Flag;

/* color of palettes */
typedef struct bGPDpalettecolor {
	struct bGPDpalettecolor *next, *prev;
	char info[64];           /* Color name. Must be unique. */
	float color[4];
	float fill[4];           /* color that should be used for drawing "fills" for strokes */
	short flag;              /* settings for palette color */
	char  pad[6];            /* padding for compiler alignment error */
} bGPDpalettecolor;

/* bGPDpalettecolor->flag */
typedef enum eGPDpalettecolor_Flag {
	/* color is active */
	PC_COLOR_ACTIVE = (1 << 0),
	/* don't display color */
	PC_COLOR_HIDE = (1 << 1),
	/* protected from further editing */
	PC_COLOR_LOCKED = (1 << 2),
	/* do onion skinning */
	PC_COLOR_ONIONSKIN = (1 << 3),
	/* "volumetric" strokes */
	PC_COLOR_VOLUMETRIC = (1 << 4),
	/* Use High quality fill */
	PC_COLOR_HQ_FILL = (1 << 5)
} eGPDpalettecolor_Flag;

/* palette of colors */
typedef struct bGPDpalette {
	struct bGPDpalette *next, *prev;

	/* pointer to individual colours */
	ListBase colors;
	char info[64];          /* Palette name. Must be unique. */

	short flag;
	char pad[6];            /* padding for compiler alignment error */
} bGPDpalette;

/* bGPDpalette->flag */
typedef enum eGPDpalette_Flag {
	/* palette is active */
	PL_PALETTE_ACTIVE = (1 << 0)
} eGPDpalette_Flag;

/* Grease-Pencil Annotations - 'Stroke'
 * 	-> A stroke represents a (simplified version) of the curve
 *	   drawn by the user in one 'mousedown'->'mouseup' operation
 */
typedef struct bGPDstroke {
	struct bGPDstroke *next, *prev;

	bGPDspoint *points;		/* array of data-points for stroke */
	bGPDtriangle *triangles;/* tesselated triangles for GP Fill */
	int totpoints;          /* number of data-points in array */
	int tot_triangles;      /* number of triangles in array */

	short thickness;        /* thickness of stroke */
	short flag, pad[2];     /* various settings about this stroke */

	double inittime;		/* Init time of stroke */
	/* The pointer to color is only used during drawing, but not saved 
	 * colorname is the join with the palette, but when draw, the pointer is update if the value is NULL
	 * to speed up the drawing
	 */
	char colorname[128];    /* color name */
	bGPDpalettecolor *palcolor; /* current palette color */
	/* temporary layer name only used during copy/paste to put the stroke in the original layer */
	char tmp_layerinfo[128];
} bGPDstroke;

/* bGPDstroke->flag */
typedef enum eGPDstroke_Flag {
	/* stroke is in 3d-space */
	GP_STROKE_3DSPACE		= (1 << 0),
	/* stroke is in 2d-space */
	GP_STROKE_2DSPACE		= (1 << 1),
	/* stroke is in 2d-space (but with special 'image' scaling) */
	GP_STROKE_2DIMAGE		= (1 << 2),
	/* stroke is selected */
	GP_STROKE_SELECT		= (1 << 3),
	/* Recalculate triangulation for high quality fill (when true, force a new recalc) */
	GP_STROKE_RECALC_CACHES = (1 << 4),
	/* Recalculate the color pointer using the name as index (true force a new recalc) */
	GP_STROKE_RECALC_COLOR = (1 << 5),
	/* Flag used to indicate that stroke is closed and draw edge between last and first point */
	GP_STROKE_CYCLIC = (1 << 7),
	/* only for use with stroke-buffer (while drawing eraser) */
	GP_STROKE_ERASER		= (1 << 15)
} eGPDstroke_Flag;

/* Grease-Pencil Annotations - 'Frame'
 *	-> Acts as storage for the 'image' formed by strokes
 */
typedef struct bGPDframe {
	struct bGPDframe *next, *prev;
	
	ListBase strokes;	/* list of the simplified 'strokes' that make up the frame's data */
	
	int framenum;		/* frame number of this frame */
	
	short flag;			/* temp settings */
	short key_type;		/* keyframe type (eBezTriple_KeyframeType) */
} bGPDframe;

/* bGPDframe->flag */
typedef enum eGPDframe_Flag {
	/* frame is being painted on */
	GP_FRAME_PAINT		= (1 << 0),
	/* for editing in Action Editor */
	GP_FRAME_SELECT		= (1 << 1)
} eGPDframe_Flag;

/* Grease-Pencil Annotations - 'Layer' */
typedef struct bGPDlayer {
	struct bGPDlayer *next, *prev;
	
	ListBase frames;		/* list of annotations to display for frames (bGPDframe list) */
	bGPDframe *actframe;	/* active frame (should be the frame that is currently being displayed) */
	
	short flag;				/* settings for layer */
	short thickness;		/* current thickness to apply to strokes */
	
	short gstep;			/* Ghosts Before: max number of ghost frames to show between active frame and the one before it (0 = only the ghost itself) */
	short gstep_next;		/* Ghosts After:  max number of ghost frames to show after active frame and the following it    (0 = only the ghost itself) */
	
	float gcolor_prev[3];	/* optional color for ghosts before the active frame */
	float gcolor_next[3];	/* optional color for ghosts after the active frame */
	
	float color[4];			/* Color for strokes in layers (replaced by palettecolor). Only used for ruler (which uses GPencil internally) */
	float fill[4];			/* Fill color for strokes in layers.  Not used and replaced by palettecolor fill */
	
	char info[128];			/* optional reference info about this layer (i.e. "director's comments, 12/3")
							 * this is used for the name of the layer  too and kept unique. */
	
	struct Object *parent;  /* parent object */
	float inverse[4][4];    /* inverse matrix (only used if parented) */
	char parsubstr[64];     /* String describing subobject info, MAX_ID_NAME-2 */
	short partype, pad;
	
	float tintcolor[4];     /* Color used to tint layer, alpha value is used as factor */
	float opacity;          /* Opacity of the layer */
} bGPDlayer;

/* bGPDlayer->flag */
typedef enum eGPDlayer_Flag {
	/* don't display layer */
	GP_LAYER_HIDE			= (1 << 0),
	/* protected from further editing */
	GP_LAYER_LOCKED			= (1 << 1),
	/* layer is 'active' layer being edited */
	GP_LAYER_ACTIVE			= (1 << 2),
	/* draw points of stroke for debugging purposes */
	GP_LAYER_DRAWDEBUG 		= (1 << 3),
	/* do onion skinning */
	GP_LAYER_ONIONSKIN		= (1 << 4),
	/* for editing in Action Editor */
	GP_LAYER_SELECT			= (1 << 5),
	/* current frame for layer can't be changed */
	GP_LAYER_FRAMELOCK		= (1 << 6),
	/* don't render xray (which is default) */
	GP_LAYER_NO_XRAY		= (1 << 7),
	/* use custom color for ghosts before current frame */
	GP_LAYER_GHOST_PREVCOL	= (1 << 8),
	/* use custom color for ghosts after current frame */
	GP_LAYER_GHOST_NEXTCOL	= (1 << 9),
	/* "volumetric" strokes */
	GP_LAYER_VOLUMETRIC		= (1 << 10),
	/* Use high quality fill (instead of buggy legacy OpenGL Fill) */
	GP_LAYER_HQ_FILL        = (1 << 11),
	/* Unlock color */
	GP_LAYER_UNLOCK_COLOR 	= (1 << 12),
	/* always show onion skins (i.e. even during renders/animation playback) */
	GP_LAYER_GHOST_ALWAYS	= (1 << 13),
} eGPDlayer_Flag;

/* Grease-Pencil Annotations - 'DataBlock' */
typedef struct bGPdata {
	ID id;					/* Grease Pencil data is a datablock */
	struct AnimData *adt;   /* animation data - for animating draw settings */
	
	/* saved Grease-Pencil data */
	ListBase layers;		/* bGPDlayers */
	int flag;				/* settings for this datablock */

	/* not-saved stroke buffer data (only used during paint-session) 
	 * 	- buffer must be initialized before use, but freed after 
	 *	  whole paint operation is over
	 */
	short sbuffer_size;			/* number of elements currently in cache */
	short sbuffer_sflag;		/* flags for stroke that cache represents */
	void *sbuffer;				/* stroke buffer (can hold GP_STROKE_BUFFER_MAX) */
	float scolor[4];            /* buffer color using palettes */
	float sfill[4];             /* buffer fill color */
	char  pad[6];               /* padding for compiler alignment error */
	short sflag;                /* settings for palette color */

	/* saved palettes */
	ListBase palettes;
} bGPdata;

/* bGPdata->flag */
/* NOTE: A few flags have been deprecated since early 2.5,
 *       since they have been made redundant by interaction
 *       changes made during the porting process.
 */
typedef enum eGPdata_Flag {
	/* don't allow painting to occur at all */
	/* GP_DATA_LMBPLOCK  = (1 << 0), */
	
	/* show debugging info in viewport (i.e. status print) */
	GP_DATA_DISPINFO	= (1 << 1),
	/* in Action Editor, show as expanded channel */
	GP_DATA_EXPAND		= (1 << 2),
	
	/* is the block overriding all clicks? */
	/* GP_DATA_EDITPAINT = (1 << 3), */
	
/* ------------------------------------------------ DEPRECATED */
	/* new strokes are added in viewport space */
	GP_DATA_VIEWALIGN	= (1 << 4),
	
	/* Project into the screen's Z values */
	GP_DATA_DEPTH_VIEW	= (1 << 5),
	GP_DATA_DEPTH_STROKE = (1 << 6),

	GP_DATA_DEPTH_STROKE_ENDPOINTS = (1 << 7),
/* ------------------------------------------------ DEPRECATED */
	
	/* Stroke Editing Mode - Toggle to enable alternative keymap for easier editing of stroke points */
	GP_DATA_STROKE_EDITMODE	= (1 << 8),
	
	/* Convenience/cache flag to make it easier to quickly toggle onion skinning on/off */
	GP_DATA_SHOW_ONIONSKINS = (1 << 9),
	/* Draw a green and red point to indicate start and end of the stroke */
	GP_DATA_SHOW_DIRECTION = (1 << 10)
} eGPdata_Flag;

#endif /*  __DNA_GPENCIL_TYPES_H__ */