iphone, retina, ipad « cocos2d for iPhone

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iphone, retina, ipad

(8 posts) (6 voices)

Started 1 year ago by Apolloe
Latest reply from damiano

Tags:

ipad
retina

Apolloe
Member

Hi,

I'm a bit confused about the method of using -hd after an image for retina display. In principle it sounds simple - if it's a retina display, and you have -hd, it will load that instead giving a higher quality image.

But if I want to do hd art for iphone, and make this game for ipad, does this mean I'll have three sets of art assets?
* iphone 3G/3GS art assets
* iphone 4 hd assets
* ipad assets

Is this right? Or have I missed something obvious about this new feature.

Thanks for your help on what is probably a simple and obvious question!

Posted 1 year ago #
Dragyn
Member

You're pretty much nailed it.

For standard iPhone vs. iPhone retina display: Once you enable retina mode, if it is running on a retina display (scale == 2), then anytime you call for a graphic file, it will try to load one with -hd in the name (image.png vs. image-hd.png). It really is that simple.

riq hasn't integrated anything specific about "if iPad, load images with a different extension" yet, but I've seen some code in the forums that will let you identify if you're running on an iPad, and can trigger different images for it. I think some people have modified the CCFileUtils to achieve a similar file-swap. That being said, since the iPad has a different aspect ratio, you may have some extra layout code that will be different if you're running on an iPad.

Of course, having 3 sets of images is pretty big, so definitely look into optimized sprite sheets with TexturePacker or Zwoptex.

Posted 1 year ago #
TBBle
Moderator

Depending on your project, you can probably share most of your assets on the iPad with either the SD art (UI elements and things that you want to remain the same physical size) or HD art (things that you want to remain the same size relative to the screen).

My current project has one iPad-specific texture sheet, which is all those assets which are the full width of the screen. Everything else uses either the HD or SD assets.

Posted 1 year ago #
Apolloe
Member

Thanks for the answers guys. TBBle, that's probably pretty much what I'll do. Like you say, some assets will be ipad specific, while some will be the same for both devices.

Posted 1 year ago #
slipster216
Moderator

I actually used a different technique from the cocos one; that said, the info might come in useful..

I authored everything at 1024x683 for the ipad, which means it's letterboxed on the iPad. This gets scaled using contentScale for the retna to 960x480. I also have zwoptex output a 480x360 version for older devices. I also have zwoptex drop these into a highres and lores folder.

In xcode I made a highres and lores bundle and put the appropriate images into each. Then I set the loading bundle in cocos to point to the correct bundle at init and I'm done.

Posted 1 year ago #
robseward
Member

For non-cocos development, you can specify the device, as well as the scaling in the image name. For example:

myAsset~iphone.png
myAsset@2x~iphone.png
myAsset~ipad.png

Does anyone know if something like this is possible in cocos, or is planned? It would make my life much easier.

Posted 1 year ago #
Dragyn
Member

@robseward: cocos2D already has an extension for retina, -hd. So the standard res file would be pic.png, and the retina would be -hd. Since there are other issues concerning iPad vs. iPhone - specifically a different aspect ratio - there is no official cocos2D extension for iPad assets.

However, if you search the forums here, there are a number of solutions that have been developed for integration of iPad assets. Most solutions for the loading are handled by modifying the ccFileUtils file in the cocos2D core.

Posted 1 year ago #
damiano
Member

Please, also give a look at this and I apologize in advance if I put it in the wrong place:
http://www.cocos2d-iphone.org/forum/topic/15434?replies=1#post-87533

Posted 1 year ago #

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