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/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Simple macros to set up storage allocation and basic types for libart
functions. */
#ifndef __ART_MISC_H__
#define __ART_MISC_H__
#include "config.h"
typedef byte art_u8;
typedef uint16 art_u16;
typedef uint32 art_u32;
#include <stdlib.h> /* for malloc, etc. */
/* These aren't, strictly speaking, configuration macros, but they're
damn handy to have around, and may be worth playing with for
debugging. */
#define art_new(type, n) ((type *)malloc ((n) * sizeof(type)))
#define art_renew(p, type, n) ((type *)realloc (p, (n) * sizeof(type)))
/* This one must be used carefully - in particular, p and max should
be variables. They can also be pstruct->el lvalues. */
#define art_expand(p, type, max) do { if(max) { p = art_renew (p, type, max <<= 1); } else { max = 1; p = art_new(type, 1); } } while (0)
typedef int art_boolean;
#define ART_FALSE 0
#define ART_TRUE 1
/* define pi */
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif /* M_PI */
#ifndef M_SQRT2
#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
#endif /* M_SQRT2 */
/* Provide macros to feature the GCC function attribute.
*/
#if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4))
#define ART_GNUC_PRINTF( format_idx, arg_idx ) \
__attribute__((__format__ (__printf__, format_idx, arg_idx)))
#define ART_GNUC_NORETURN \
__attribute__((__noreturn__))
#else /* !__GNUC__ */
#define ART_GNUC_PRINTF( format_idx, arg_idx )
#define ART_GNUC_NORETURN
#endif /* !__GNUC__ */
void ART_GNUC_NORETURN
art_die(const char *fmt, ...) ART_GNUC_PRINTF(1, 2);
void
art_warn(const char *fmt, ...) ART_GNUC_PRINTF(1, 2);
#define ART_USE_NEW_INTERSECTOR
typedef struct _ArtDRect ArtDRect;
typedef struct _ArtIRect ArtIRect;
struct _ArtDRect {
/*< public >*/
double x0, y0, x1, y1;
};
struct _ArtIRect {
/*< public >*/
int x0, y0, x1, y1;
};
typedef struct _ArtPoint ArtPoint;
struct _ArtPoint {
/*< public >*/
double x, y;
};
/* Basic data structures and constructors for sorted vector paths */
typedef struct _ArtSVP ArtSVP;
typedef struct _ArtSVPSeg ArtSVPSeg;
struct _ArtSVPSeg {
int n_points;
int dir; /* == 0 for "up", 1 for "down" */
ArtDRect bbox;
ArtPoint *points;
};
struct _ArtSVP {
int n_segs;
ArtSVPSeg segs[1];
};
void
art_svp_free(ArtSVP *svp);
int
art_svp_seg_compare(const void *s1, const void *s2);
/* Basic data structures and constructors for bezier paths */
typedef enum {
ART_MOVETO,
ART_MOVETO_OPEN,
ART_CURVETO,
ART_LINETO,
ART_END
} ArtPathcode;
typedef struct _ArtBpath ArtBpath;
struct _ArtBpath {
/*< public >*/
ArtPathcode code;
double x1;
double y1;
double x2;
double y2;
double x3;
double y3;
};
/* Basic data structures and constructors for simple vector paths */
typedef struct _ArtVpath ArtVpath;
/* CURVETO is not allowed! */
struct _ArtVpath {
ArtPathcode code;
double x;
double y;
};
/* Some of the functions need to go into their own modules */
void
art_vpath_add_point(ArtVpath **p_vpath, int *pn_points, int *pn_points_max,
ArtPathcode code, double x, double y);
ArtVpath *art_bez_path_to_vec(const ArtBpath *bez, double flatness);
#endif /* __ART_MISC_H__ */
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