Lerking/gtk
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

curve: Add gsk_curve_reverse

Browse Source 
This will be used in stroking.
This commit is contained in:
Matthias Clasen
2020-12-13 00:42:53 -05:00
parent e44be94835
commit b1363aadeb
2 changed files with 56 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
gsk/gskcurve.c
View File

@@ -70,6 +70,8 @@ struct _GskCurveClass
void (* offset) (const GskCurve *curve,
float distance,
GskCurve *offset_curve);
void (* reverse) (const GskCurve *curve,
GskCurve *reverse);
};
/* {{{ Line implementation */
@@ -312,6 +314,17 @@ gsk_line_curve_offset (const GskCurve *curve,
gsk_curve_init (offset_curve, gsk_pathop_encode (GSK_PATH_LINE, p));
}
static void
gsk_line_curve_reverse (const GskCurve *curve,
GskCurve *reverse)
{
const GskLineCurve *self = &curve->line;
reverse->op = GSK_PATH_LINE;
reverse->line.points[0] = self->points[1];
reverse->line.points[1] = self->points[0];
}
static const GskCurveClass GSK_LINE_CURVE_CLASS = {
gsk_line_curve_init,
gsk_line_curve_init_foreach,
@@ -328,7 +341,8 @@ static const GskCurveClass GSK_LINE_CURVE_CLASS = {
gsk_line_curve_get_start_end_tangent,
gsk_line_curve_get_bounds,
gsk_line_curve_get_bounds,
gsk_line_curve_offset
gsk_line_curve_offset,
gsk_line_curve_reverse
};
/* }}} */
@@ -674,6 +688,20 @@ gsk_curve_curve_offset (const GskCurve *curve,
gsk_curve_curve_init_from_points (&offset->curve, p);
}
static void
gsk_curve_curve_reverse (const GskCurve *curve,
GskCurve *reverse)
{
const GskCurveCurve *self = &curve->curve;
reverse->op = GSK_PATH_CURVE;
reverse->curve.points[0] = self->points[3];
reverse->curve.points[1] = self->points[2];
reverse->curve.points[2] = self->points[1];
reverse->curve.points[3] = self->points[0];
reverse->curve.has_coefficients = FALSE;
}
static const GskCurveClass GSK_CURVE_CURVE_CLASS = {
gsk_curve_curve_init,
gsk_curve_curve_init_foreach,
@@ -690,7 +718,8 @@ static const GskCurveClass GSK_CURVE_CURVE_CLASS = {
gsk_curve_curve_get_end_tangent,
gsk_curve_curve_get_bounds,
gsk_curve_curve_get_tight_bounds,
gsk_curve_curve_offset
gsk_curve_curve_offset,
gsk_curve_curve_reverse
};
/* }}} */
@@ -1282,6 +1311,20 @@ gsk_conic_curve_offset (const GskCurve *curve,
gsk_conic_curve_init_from_points (&offset->conic, p);
}
static void
gsk_conic_curve_reverse (const GskCurve *curve,
GskCurve *reverse)
{
const GskConicCurve *self = &curve->conic;
reverse->op = GSK_PATH_CONIC;
reverse->conic.points[0] = self->points[3];
reverse->conic.points[1] = self->points[1];
reverse->conic.points[2] = self->points[2];
reverse->conic.points[3] = self->points[0];
reverse->conic.has_coefficients = FALSE;
}
static const GskCurveClass GSK_CONIC_CURVE_CLASS = {
gsk_conic_curve_init,
gsk_conic_curve_init_foreach,
@@ -1298,7 +1341,8 @@ static const GskCurveClass GSK_CONIC_CURVE_CLASS = {
gsk_conic_curve_get_end_tangent,
gsk_conic_curve_get_bounds,
gsk_conic_curve_get_tight_bounds,
gsk_conic_curve_offset
gsk_conic_curve_offset,
gsk_conic_curve_reverse
};
/* }}} */
@@ -1448,6 +1492,13 @@ gsk_curve_offset (const GskCurve *curve,
get_class (curve->op)->offset (curve, distance, offset_curve);
}
void
gsk_curve_reverse (const GskCurve *curve,
GskCurve *reverse)
{
get_class (curve->op)->reverse (curve, reverse);
}
/* }}} */
/* vim:set foldmethod=marker expandtab: */

2
gsk/gskcurveprivate.h
View File

@@ -139,6 +139,8 @@ int gsk_curve_intersect (const GskCurve
void gsk_curve_offset (const GskCurve *curve,
float distance,
GskCurve *offset_curve);
void gsk_curve_reverse (const GskCurve *curve,
GskCurve *reverse);
G_END_DECLS