common: stroke dash offset support with new apis.
This change just allows users to use the offset of the stroke dash.
Actually feature enhacement has been introduced by
478e45f9f3.
@APIs:
uint32_t Shape::strokeDash(const float** dashPattern) ->
uint32_t Shape::strokeDash(const float** dashPattern, float* offset = nullptr)
Result Shape::strokeDash(const float* dashPattern, uint32_t cnt) ->
Result Shape::strokeDash(const float* dashPattern, uint32_t cnt, float offset = 0.0f)
Tvg_Result tvg_shape_set_stroke_dash(Tvg_Paint* paint, const float* dashPattern, uint32_t cnt) ->
Tvg_Result tvg_shape_set_stroke_dash(Tvg_Paint* paint, const float* dashPattern, uint32_t cnt, float offset)
Tvg_Result tvg_shape_get_stroke_dash(const Tvg_Paint* paint, const float** dashPattern, uint32_t* cnt) ->
Tvg_Result tvg_shape_get_stroke_dash(const Tvg_Paint* paint, const float** dashPattern, uint32_t* cnt, float* offset)
@Issue: https://github.com/thorvg/thorvg/issues/1372
25a1321243