Add: thumbnail helper function

[matrixik]

Hi,

I added thumbnail helper function so that if someone simply want to create thumbnails he don't need to reinvent the wheel every time.

I have one question about behaviour:

• Python PIL thumbnail method process images even if they are smaller than max provided sizes (resize them to same size) and don't process images only if file sizes are same as max provided sizes.
• I made this method to not process images if they sizes are same or smaller than max provided sizes.

Which approach do you prefer?

Best regards, Dobrosław Żybort

[nfnt]

Sorry for the waiting. I just merged your thumbnail function. Very helpful, thanks a lot!

[matrixik]

Thank you for accepting my code. But you did not say what approach you prefer. After some thinking I came to the conclusion that maybe Python PIL approach is better. Because if someone want thumbnail they most likely would also want them to be smaller (in file size) than original image and they are OK with lower quality and removed all meta-data. So maybe Thumbnail function should always process image with provided interpolation function.

Best regards, Dobrosław Żybort

[nfnt]

I'm sure both methods have their benefits and use cases. Let's stick with the one you provided.

[matrixik]

OK, but then maybe Thumbnail function should return second argument with information if image was processed or not: (image.Image, bool)?

[nfnt]

In my opinion the documentation should be enough.

[matrixik]

OK, thank you