Open GL ES Texture image quality

I have been having a bit of trouble with this issue with a while and have decided to ask for help!

I have a textured 1024 x 1024 area in my iphone application. I am texturing it using an image that i converted to .pvr4 format using Apples texturetool.

Now the user has the option of zooming in on this textur开发者_StackOverflowed object....

The issue is that the quality of the image is not good enough when it is at the highest zoom level.

How can i improve this?

Should i be looking at mip mapping?

Any pointers in the right direction would be greatly appreciated.

Thanks

Tom

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If you zoom in enough on any texture, you won't see much detail.

Here are your options:

• You can change the magnification filtering mode so that instead of being blocky (nearest filtering), it's blurry (linear filtering). (Or vice-versa.)
• Don't use PVR texture compression. This will make your texture more detailed. (But at the usual cost: larger size, slower rendering.)
• When zooming in, switch to a more detailed texture for that specific area.

The last option is the most work, but will likely give the best results. (But try the other two, they're easy.)

Also, mip-mapping likely won't help your situation. In general, enabling mip-mapping can make textured objects far away from the camera look better. It usually doesn't have any effect when the camera is close to a textured object.

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PVR4-compression is rather destructive. Simply choose another format if texture quality is crucial.