tree bc506a76edaa98c6285f6e2496c83585d1ada1cc
parent de258cd6b402c4da78b66e88191ad02162d87916
author kkinnunen <kkinnunen@nvidia.com> 1413439434 -0700
committer Commit bot <commit-bot@chromium.org> 1413439434 -0700

Refactor SkGLContext to be actually extendable

Refactor SkGLContext to be actually extendable. Before, non-trivial subclass
would need to destroy the GL connection upon running the destructor. However,
the base class would run GL commands in its own destructor (with destroyed GL
connection)

Refactor so that SkGLContext subclass object creation is completely done by
the factory function. If the factory function returns a non-NULL ptr, it means the context
is usable.

The destruction is done with the destructor instead of virtual function called
upon destruction. Make the destructors not to call virtual functions, for
clarity.

Remove custom 1x1 FBO setup code from the base class. It appears not to be used
anymore.

BUG=skia:2992

Review URL: https://codereview.chromium.org/640283004