[Lazarus] Fast drawing to canvas

[Graeme Geldenhuys]

2012/2/8  <dhkblaszyk at zee....>:
> with a TImage. The OnPaint code below works just fine. When I move the
> scrollbar, the images are drawn to the canvas, however there is still a bit
> of flicker.

I don't know the graphics system of LCL, but I thought I would ask the
obvious question first. Do you have Double Buffering enabled?

Another problem might be that fcl-image (what LCL graphics is based
on), is apparently the slowest graphics routines out there! I didn't
do the research, but it was brought to my attention by somebody else.
Henk compared various image loading and painting frameworks. He put
the results on his website. He also sent me a copy of his test program
(if anybody else was interested in taking a look).

  http://members.upc.nl/h.speksnijder4/software/fpGUI/images.html


-- 
Regards,
  - Graeme -


_______________________________________________
fpGUI - a cross-platform Free Pascal GUI toolkit
http://fpgui.sourceforge.net