freeimage() needed before copyimage()

[jassing]

Let's say #image1 is an image, but I issues CopyImage(#image2, #image1) --- is the memory automatically freed, or should I be calling freeimage 1st?

[Bisonte]

Clean programming means: If you take something, you give it back when it is no longer needed.

A programming language cannot see into the programmer's head to guess what he is going to do next.

But in this case : If #Image1 is a fixed number (and not created with #PB_Any) then it is released.

At least that's what everyone has said so far...

(translated by DeepL.com)

[boddhi]

Hello,

Code: Select all

Enumeration
  #image1
  #Image2
EndEnumeration

; Example 1 : When #Image2 doesn't exist
CreateImage(#image1,50,50)
CopyImage(#image1,#Image2)
Debug IsImage(#Image2)

; Example 2 : When #Image2 already exists
ResizeImage(#Image2,1,1)
CopyImage(#image1,#Image2)
Debug IsImage(#Image2)

[mk-soft]

PB-Help: https://www.purebasic.com/documentation ... jects.html

- An object that is associated with an index is automatically freed when reusing that index.

[jassing]

Clean programming means: If you take something, you give it back when it is no longer needed.

Yes, I understand that. Yet, purebasic does some things "automatically" ... I realized I hadn't free'd the images, and wondered if I needed to go back into the code and change it. I don't regularly work with images... I was hoping copyimage would free the destination if it exists.

A programming language cannot see into the programmer's head to guess what he is going to do next.

However, if you're copying #iamge1 to #image2 - the language could know #image2 is no longer needed.

[jassing]

PB-Help: https://www.purebasic.com/documentation ... jects.html

- An object that is associated with an index is automatically freed when reusing that index.

Thank you.