iPhone相机图像为OpenGL ES纹理

Is it possible to use an image captured with the iPhone's camera as a texture that is then manipulated in OpenGL ES (flag wave effect, etc.)? The main problem being the size of the iPhone screen being 320x480 (no status bar) and thus the image won't have dimensions that are power-of-2. Is the main option copying it into a 512x512 texture and adjusting the vertices?Is it possible to use an image captured with th