Performance idea

Hi!

An idea which might be wrong for D2D but for GDI+ drawing a line is very expensive. Since most time you draw a straight line, vertical or horizontal I figured out that instead of using draw line, drawing a 1pixel rectangle is 5x faster than draw line.

Not sure if it is the same case here but if, it could be interesting with a “drawlinevertical” and “drawlinehorisontal” function which simply
Wraps the draw rectangle function.

Best
Christian

No file, test, or entry point is named. Locate the Direct2D line- and rectangle-drawing entry points, then benchmark the proposed vertical and horizontal cases against the current line path; done requires a confirmed performance benefit and an agreed API or documented reason not to add it.

Written by the indexing model from the issue text.