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virtual void OSystem::updateScreen (  )  [pure virtual]

Flush the whole screen, that is render the current content of the screen framebuffer to the display.

This method could be called very often by engines. Backends are hence supposed to only perform any redrawing if it is necessary, and otherwise return immediately. For a discussion of the subject, see <http://www.nabble.com/ATTN-porters%3A-updateScreen%28%29-OSystem-method-tt3960261.html#a3960261>

Referenced by Cine::FWRenderer::fadeToBlack(), and Sci::GfxDriver::update().

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