iPad, power of 2 images?

fzeed

Do i need to worry about my images being divisible by 2 and having even pixel dimensions and stuff like that? I currently do that for iPod stuff but is it necessary for iPad?

old_kipper

Yes, and also keep in mind the powers of 2 for image dimensions.

kipper

DoMan

When you say that, do you mean every picture will be four times smaller than on screen? (like the retina display) And for the ^2 for images, does that mean just keeping your image dimensions in even numbers - like 234 instead of 237 or 23?

gyroscope

Hi DoMan,

DoMan said:
When you say that, do you mean every picture will be four times smaller than on screen? (like the retina display)

No, images come at the sizes you want on the iPad. There is no retina display (yet?...) on the iPad so Resolution Independence is not relevant.

DoMan said:
And for the ^2 for images, does that mean just keeping your image dimensions in even numbers - like 234 instead of 237 or 23?

What kipper is saying: an example, say you have an image which is 256 x 258. This is fine as the dimensions are divisible by 2, but it will be allocated memory as if it was 512 x 512 (because the 258 dimension tips it into the next "power of 2"). So ideally try to keep all images to, or just below 2,4,8,16,32,64,128,256,512 and the max. of 1024. (But don't worry too much, if an image is around 200 let's say, that's fine, just be aware it'll be allocated memory of a 256 image, etc.)

:-)

gyroscope

gyroscope said:
Hi DoMan,

No, images come at the sizes you want on the iPad. There is no retina display (yet?...) on the iPad so Resolution Independence is not relevant.

What kipper is saying: an example, say you have an image which is 256 x 258. This is fine as the dimensions are divisible by 2, but it will be allocated memory as it was 512 x 512 (because the 258 dimension tips it into the next "power of 2". So ideally try to keep all images to, or just below 2,4,8,16,32,64,128,256,512 and the max. of 1024 if they "tip over".

:-)

DoMan

Oh, so I must keep all my images as close to the sizes as those ones, and not above them, otherwise GS will think it is the next size in that list?

gyroscope

Yes, that's right. It's no big deal though if you've not many images/sounds, etc; but with larger projects, every bit of memory management helps!

DoMan

And if you have lot's of the same actor, with a bad image size? Will that slow down the game's performance, if so, my game to needs to be practically rebuilt...

gyroscope

"Bad" image size itself won't slow the game's performance so much if they're all the same actor but still probably best to resize them. Just drag them into the Images well and providing it's the same name, a dialog will appear giving you the option to replace the images in one go. :-)

fzeed

Thanks!

gyroscope

Whoops, I forget you started this thread, fzeed! You're welcome (and from kipper as well, I'm certain - don't like to call him old... ;-)

:-)

old_kipper

Old is just a fact but thank you for sparing me the reminder....

A somewhat dashing for his age... Kipper

gyroscope

I'm sure of that. :-)