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Lazy Foo Tutorial Question

Started by Hammonjj Mar 11, 2007 at 2:30 PM 0 replies 700+ views

Original Post

Mar 11, 2007 at 2:30 PM

I've recently started working on SDL and I have been using Lazy Foo's tutorials to do this(They're great, by the way), but I do have a question about why he did something. Here's a link to the tutorial: http://lazyfoo.net/SDL_tutorials/lesson02/index.php He uses the SDL_FreeSurface Command to free the surface after he is done using them, but at the very end he never frees "screen" and I want to know why. Why does he need to worry about freeing both the background image and message, but not the screen? Thanks!

rip-off

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rip-off

Mar 11, 2007 at 2:35 PM

The screen is a special surface that is freed by either SDL_Quit() or SDL_QuitSubSystem(SDL_INIT_VIDEO).

This kind of thing is mentioned in the SDL documentation, this particular point is made near the end of this page ( at the return value section ).

Actually, after reading the tutorial I see this is mentioned in it:

Quote:
Source: Lazy Foo tutorial
Now we do the end of the program clean up.

SDL_FreeSurface() is used to get rid of the surfaces we loaded since we're not using them anymore. If we don't free the memory we used, we will cause a memory leak.

Then SDL_Quit() is called to quit SDL. Then we return 0, ending the program.
You may be asking yourself "why aren't we freeing the screen surface?". Don't worry. SDL_Quit() will take care of that for us.

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