Re: [PATCH v2 0/3] MR1539: gdiplus: add support for Custom Line Indent.

[Bartosz Kosiorek (＠gang65)]

Bartosz Kosiorek (@gang65) commented about dlls/gdiplus/graphicspath.c:
>          endpoint->Y + perp_dy, PathPointTypeLine);
>      break;
>  }
> - case LineCapArrowAnchor:
> - {
> -
>    REAL segment_dy = nextpoint->Y - endpoint->Y;
> -
>    REAL segment_dx = nextpoint->X - endpoint->X;
> -
>    REAL segment_length = sqrtf(segment_dy * segment_dy + segment_dx * segment_dx);
> -
>    REAL par_dx = pen_width * segment_dx / segment_length;
> -
>    REAL par_dy = pen_width * segment_dy / segment_length;
> -
>    REAL perp_dx = -par_dy;
> -
>    REAL perp_dy = par_dx;
> -
> -
>    *last_point = add_path_list_node(*last_point, endpoint->X + 1.75 * par_dx + perp_dx,

Length of the arrow value (1.75) was taken experimentally (it is not documented), by coparison generated arrows with native and buildin gdiplus dll.