cubemap support, work in progress.

src/nvtt/TexImage.h

@@ -78,6 +78,7 @@ namespace nvtt
 } // nvtt namespace
 
 namespace nv {
+    uint countMipmaps(uint w);
     uint countMipmaps(uint w, uint h, uint d);
     uint computeImageSize(uint w, uint h, uint d, uint bitCount, uint alignmentInBytes, nvtt::Format format);
     void getTargetExtent(int & w, int & h, int & d, int maxExtent, nvtt::RoundMode roundMode, nvtt::TextureType textureType);