Migrate the id property to the base class internals
so that pimpl classes could access the data easier.
This is a sort of prerequisite change for the coming texmap anti-aliasing.
This identifier is useful when user identify the instance type in runtime.
ThorVG basically don't prefer to dynamic_cast() nor typeid(),
it compiles with -fno-rtti option for the optimial size.
Here is an example for the simple usage.
if (paint->identifier() == Shape::identifier())
auto shape = static_cast<Shape*>(paint);
@Issue: https://github.com/Samsung/thorvg/issues/693
we should avoid code insertion during file dependencies,
such as #include "xxx.h" which has implementations.
This could increase binary size, we can avoid it as possible.
Current patch improves binary size like this:
From: file(2059008) = text(120360) data(8096) bss(80) dec(128536)
To : file(1921832) = text(118429) data(7872) bss(56) dec(126357)
More additional patches will come in to optmize binary size.
remove unnecessary condition.
implementation won't be included multiple times not like headers.
Thus this condition is unnecessary.
Change-Id: Id37e675c40ce7213a06c950da8e5ca17ff7245c9
Now, stabilizing is pretty enough.
Remove assert code so that we never abort process in any cases.
This also reduce the binary size.
Change-Id: Ia7d2d5c5a0757b12481eaebad7a86aade6a89c1e
