Before making game apps, I want to have any certain smartphone device brands that runs on OpenGL. I have to make a code for images that doesn't need to required power of 2 images so that I can resize the images independently from the start. However, some images appeared in white instead of the appearance that I expected like the old model phone T-Mobile on Android 1.6 for example after I disabled the power of 2 code. The only device I've known that worked and displayed image sprites properly is the Google Nexus 7. Can you tell me either other phone models that can display images without the need of power of 2 and will not display white images instead? Please give me an example at least. Thank you.
Well, AFAIK, OpenGL ES 2.0 supports non-power-of-2 (NPOT) textures, but only for certain configurations. Check this answer here for details on this:
For OpenGL ES 1.x, NPOT textures are not supported by default. There are various (mostly non-standard) extentions that allow you do to this but they are manufacturer/video-card/driver specific (i.e. for some Apple IOS 2 devices there's a GL_APPLE_texture_2D_limited_npot that allows you to do that).
My advice is :