PureBasic Forums - English

The secret of flicker free animations on canvas

Not realy

Do simple this :
1. All you will animate, make the output complete on a hidden image
2. This complete output copy now in the canvas
3. Have fun

A second way :
1. Create a second canvas, outside the visible area (Not a hidden, this works not with all OS !)
2. Make your output on this invisible canvas
3. Copy the drawing buffer from the invisible to the visible canvas
4, Have fun

It is sooo simple, abslolutely without nasty tricks and works on all OS

The gadget already does that for you. Just do all your drawing operations in a single StartDrawing/StopDrawing block and there can't be any flicker.

freak wrote:The gadget already does that for you. Just do all your drawing operations in a single StartDrawing/StopDrawing block and there can't be any flicker.

Exactly. Which is why requests to make the CanvasGadget's handling of the alpha layer mimic that of the ImageGadget are misguided.

I think, it is obvious, to know, the output come ever only after a StopDrawing()
The question was, what can i do, if i need more as one start stop