"CCConfiguration::sharedConfiguration()->supportsPVRTC()" returns false

cocos2d-x C++
#1

i use cocos2dx 2.1.3 and my os is windows 7 64bits, i can’t read PVRTC4 image using cocos2dx. From debug i find that function “CCConfiguration::sharedConfiguration()->supportsPVRTC()” returns false value. Is there anybody know why?

#2

is there anyone having the same problem?

#3

is that “CCConfiguration::supportsPVRTC()” returns true only on mac?