Hello
We use new I5 motherboards with internal HD graphics, latest video drivers. We have applications which draw a lot of line segments (not connected), say 20.000 or more per frame. We still have to use good old GDI functions which are quite fast doing so when we use the API call
CDC::PolyPolyline
which works a bit like OpenGL or directX, that means all lines are drawn before the graphics is updated.
Now, this api call does still work for i5 HD graphics, but it is incredible slow. It looks like that it is internally changed to a set of moveto-lineto commands. I get comaparable timings when i switch my code to a loop of moveto - lineto.
Why does HD graphics don´t support anymore fast 2D accerlation? I think some CAD Software would require this also.
thx
Stefan
