diff --git a/gsk/gskcurve.c b/gsk/gskcurve.c index a6d762e60c..b4a43ad497 100644 --- a/gsk/gskcurve.c +++ b/gsk/gskcurve.c @@ -70,6 +70,8 @@ struct _GskCurveClass void (* offset) (const GskCurve *curve, float distance, GskCurve *offset_curve); + void (* reverse) (const GskCurve *curve, + GskCurve *reverse); }; static void @@ -313,6 +315,17 @@ 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, @@ -329,7 +342,8 @@ 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 }; /** CURVE **/ @@ -676,6 +690,20 @@ 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, @@ -692,7 +720,8 @@ 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 }; /** CONIC **/ @@ -1285,6 +1314,20 @@ 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, @@ -1301,7 +1344,8 @@ 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 }; /** API **/ @@ -1449,3 +1493,10 @@ 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); +} diff --git a/gsk/gskcurveprivate.h b/gsk/gskcurveprivate.h index e4705f915b..0f721e2016 100644 --- a/gsk/gskcurveprivate.h +++ b/gsk/gskcurveprivate.h @@ -135,6 +135,8 @@ 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