Posted by asambol on Oct 18, 2013; 1:49pm
URL: https://forum.jogamp.org/PVRTC-textures-in-JOGL2-tp4030250p4030308.html

PVRTC1: http://www.khronos.org/registry/gles/extensions/IMG/IMG_texture_compression_pvrtc.txt
PVRTC2: http://www.khronos.org/registry/gles/extensions/IMG/IMG_texture_compression_pvrtc2.txt

PVR file format specification can be downloaded here: http://www.imgtec.com/powervr/insider/powervr-sdk-docs.asp (I think you need to sign up as a developer and sign NDA).