37     RenderMethod* renderer;  member
41     Impl(RenderMethod* pRenderer) : renderer(pRenderer)  in Impl()
43         renderer->ref();  in Impl()
49         renderer->sync();  in ~Impl()
50         renderer->clear();  in ~Impl()
54         if (renderer->unref() == 0) delete(renderer);  in ~Impl()
81         if (!renderer->clear()) return Result::InsufficientCondition;  in clear()
102             paint->pImpl->update(renderer, m, clips, 255, flag);  in update()
105                 paint->pImpl->update(renderer, m, clips, 255, flag);  in update()
115 …if (status == Status::Drawing || paints.empty() || !renderer->preRender()) return Result::Insuffic…  in draw()
119             if (paint->pImpl->render(renderer)) rendered = true;  in draw()
122         if (!rendered || !renderer->postRender()) return Result::InsufficientCondition;  in draw()
132         if (renderer->sync()) {  in sync()
146         auto surface = renderer->mainSurface();  in viewport()
151         renderer->viewport(val);  in viewport()