...which reveals that some uses are not derived from XEventListener, so re-
introduce BaseMutexHelper as an alternative (which originally got superseded by
DisambiguationHelper in 09b546cf9c "Fix
overloaded-virtual warning in canvas").
Change-Id: I1418370733b72526ec481b70fa69f03e7c28b7ce
...which reveals that SpriteCanvasBase is not derived from XBitmapCanvas, so
split up BitmapCanvasBase (just XBitmap) and BitmapCanvasBase2 (plus
XBitmapCanvas) and make IntegerBitmapBase directly abstract over those two as
arguments.
Change-Id: Ieae87fe466bb9f1a861c8a95162ef25235ae5799
Adds opengl canvas implementation - display-list-based, all
rendering done as textured geometry. Needs shader support.
Currently compiles and works on Linux, Mac should be ~easy to
add, win32 eventually.
Change-Id: Ibf3eb88d6a36a91b2960a3a6320d708160e4fc14