Using sf::RenderWindow::Capture() efficiently

[Xander314]

I noticed today that sf::Image::CopyWindow has been replaced by sf::RenderWindow::Capture().

I wanted to ask how to use this function efficiently, given the performance overhead of copying an image.

Is there something better than this:

Code: [Select]


sf::Image screenshot = Window.Capture();


I know the copy related to the return of an sf::Image can be optimised out, but how can I get around the overhead of the assignment operation?

I suppose I could do this:

Code: [Select]


sf::Image& screenshot = Window.Capture();

but in some circumstances I imagine there would be issues of scope/lifetime of the returned temporary.

[Laurent]

The copy will most likely be optimized, yes. You can't take a reference on the returned image, it's only a temporary that will be destroyed after the call is finished.

But why do you want to store the returned image? What do you do with it?