IPhone Texure Dimensions

Unity Engine
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1

As I understand it, my textures have to be power-of-two and square if I want to use texture compression, unless I am using the textures as GUITextures. On this subject, I have two follow up questions.

  1. When the warning says I have to use them as GUITextures, does that exclude textures which are used with GUI.DrawTexture, GUI.DrawButton, etc? It sounds as though it does, but I wondered if it’s a legacy warning.

  2. If I choose not to use compressed textures, what limitations (if any) still remain? The square limitation doesn’t, but do textures for GUI.Button and GUI.DrawTexture still need to be Power-of-two dimensions or is any old size ok?

I’m essentially working on a game which will be all GUI. So there will be no 3D scene. I would much prefer to use Unity’s new GUI rather than the legacy GUITexture stuff.

2

Textures have to be power-of-two and square if you want compression, at all. The warning is a legacy from Unity 2.1 and doesn’t apply to the iPhone.

It’s not a good idea to use OnGUI on the iPhone, except for menus where performance doesn’t matter. Use something like SpriteManager2 instead.

–Eric

3

  1. The requirement holds for all textures, including gui actually

  2. any size is fine

4

Thanks guys. Since it doesn’t apply to GuiTextures even, that makes that decision easy.

I realize that OnGUI isn’t very fast on IPhone/IPad, but performance isn’t really an issue. There’s no 3D scene, and precious few sprites, most of which don’t move.

5

Good habits should start early though :slight_smile:

I’ve never used an OnGui thing at all, in fact, I’d have to find a tut on how :slight_smile: