potrace_privpath_s Struct Reference

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#include <curve.h>

Collaboration diagram for potrace_privpath_s:

Data Fields
int	len
point_t *	pt
int *	lon
int	x0
int	y0
sums_t *	sums
int	m
int *	po
privcurve_t	curve
privcurve_t	ocurve
privcurve_t *	fcurve

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Detailed Description

The path structure is filled in with information about a given path as it is accumulated and passed through the different stages of the Potrace algorithm. Backends only need to read the fcurve and fm fields of this data structure, but debugging backends may read other fields.

Definition at line 72 of file curve.h.

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Field Documentation

privcurve_t potrace_privpath_s::curve

curve[m]: array of curve elements.

Definition at line 82 of file curve.h.

Referenced by adjust_vertices(), opti_penalty(), opticurve(), and path_free().

privcurve_t* potrace_privpath_s::fcurve

final curve: this points to either curve or ocurve.

Warning:

Do not free this separately.

Definition at line 85 of file curve.h.

int potrace_privpath_s::len

Definition at line 74 of file curve.h.

Referenced by adjust_vertices(), bestpolygon(), calc_lon(), calc_sums(), findpath(), penalty3(), pointslope(), setbbox_path(), and xor_path().

int* potrace_privpath_s::lon

lon[len]: (i,lon[i]) = longest straight line from i.

Definition at line 76 of file curve.h.

Referenced by bestpolygon(), calc_lon(), and path_free().

int potrace_privpath_s::m

Length of optimal polygon.

Definition at line 80 of file curve.h.

Referenced by adjust_vertices(), bestpolygon(), and plotpolygon().

privcurve_t potrace_privpath_s::ocurve

ocurve[om]: array of curve elements.

Definition at line 83 of file curve.h.

Referenced by opticurve(), and path_free().

int* potrace_privpath_s::po

po[m]: optimal polygon.

Definition at line 81 of file curve.h.

Referenced by adjust_vertices(), bestpolygon(), path_free(), and plotpolygon().

point_t* potrace_privpath_s::pt

pt[len]: path as extracted from bitmap.

Definition at line 75 of file curve.h.

Referenced by adjust_vertices(), calc_lon(), calc_sums(), findpath(), path_free(), pathlist_to_tree(), penalty3(), plotpolygon(), setbbox_path(), and xor_path().

sums_t* potrace_privpath_s::sums

sums[len+1]: cache for fast summing.

Definition at line 79 of file curve.h.

Referenced by calc_sums(), path_free(), penalty3(), and pointslope().

int potrace_privpath_s::x0

X-value of origin for sums.

Definition at line 77 of file curve.h.

Referenced by adjust_vertices(), and calc_sums().

int potrace_privpath_s::y0

Y-value of origin for sums.

Definition at line 78 of file curve.h.

Referenced by adjust_vertices(), and calc_sums().

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The documentation for this struct was generated from the following file:

• curve.h