* Fix memory leaks when axmol apps exit on non-embed systems
1. DriverBase no destroyInstance
2. Every object inherited from ax::Ref shoud destory before ScriptEngineManager, otherwise will trigger it's reinit and leak
3. QuadCommand always leak isolated indices
4. static singleton should'nt inhert from ax::Ref due to destory it before ScriptEngineManager impossible
5. Make Director don't inherit from ax::Ref due to it also cause ScriptEngineManager re-init, because we destroy ScriptEngineManger in destructor of Director
6. Explicit Director managed by Application and don't delete self at purgeDirector, since it will release at mainLoop and re-init in glView->pollEvents then leak
7. Rename ApplicationProtocol to ApplicationBase
8. Rename purgeDirector since we don't delete director self at it, maye rename to cleanup
9. Change ShaderCache to new/delete singleton, managed by ProgramManager
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Co-authored-by: lich426 <lich426@gmail.com>
* Fix compilation issue in Texture2D.cpp with _AX_DEBUG=2.
* Fix memory leak: ShaderCache was not purged.
The ShaderCache class had two static members: a map for the cache, and
a pointer to the single instance of ShaderCache. The map was
supposedly cleared in the destructor but there was actually no
instance of ShaderCache (getInstance() was never called and the other
functions accessed the map directly). This commit removes the
singleton "interface" such that only the map is used, then it cleared
the map upon request.
halx99