Check if a Texture has an Image loaded?

[Kvothe]

Not to be confused with checking whether a call to

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Texture::loadFromFile("...") was successful.
[/size]I wondered if there was a method to do something like

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Texture::hasImage() that would tell me whether a Texture has an image loaded or not?

[eXpl0it3r]

Personally I'd say that if you don't know what state your texture is in, there's a logic error in your code.
A texture "holds" an image if you have loaded one and it doesn't hold an image if you didn't load an image or if the loading failed. So the states are pretty clear and can easily be kept track of.

If you really need something like that, I think you can check the size and if it's zero, the texture doesn't reference an image.

[Kvothe]

Ha, point taken 
I was creating an object that has sprite (and texture) to render, I wanted to only load the texture on the first call to myObject.Render(...) and keep hold of it until the object was destroyed. I was trying to accomplish by checking if the texture had been loaded already but using a boolean marker now. Is this reasonable or would you say that it's a poor approach?

On a related note - the documentation says Sprite::getTexture() returns a NULL pointer if no Texture has been set - is this the C++11 nullptr or is it NULL?

[eXpl0it3r]

The boolean flag should work, like many other possibilities. Personally I'd simply make sure that if I want to load a texture only once, that I only call said function once and not repeatedly.

I suggest you look up again what nullptr actually is or what the "problem" behind NULL is. SFML doesn't use C++11, but of course you can still use C++11 with SFML.

[Kvothe]

Looking at the responses here http://stackoverflow.com/questions/7200674/is-null-defined-as-nullptr-in-c11 it seems to imply that NULL is implicitly converted to nullptr in C++11 so code such as

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if (mySprite.getTexture() == nullptr) will be fine?

[Mario]

If it compiles, it's fine.