gdi+ Graphics::DrawImage really slow~~

Question

I am using a GDI+ Graphic to draw a 4000*3000 image to screen, but it is really slow. It takes about 300ms. I wish it just occupy less than 10ms.

Bitmap *bit         


        

Answer 1

I have made some researching and wasn't able to find a way to render images with GDI/GDI+ more faster than

Graphics.DrawImage/DrawImageUnscaled

and at the same time simple like it.

Till I discovered

ImageList.Draw(GFX,Point,Index)

and yeah it's really so fast and simple.