Isn't that pretty much the exact opposite of supporting a retina display? AIUI the default behaviour of MacOS X is to do exactly as you describe for any application that doesn't specifically ask about retina displays; that way legacy applications look OK (but don't benefit) and retina aware ones get to draw things using the full resolution.
Posted Jan 9, 2013 12:53 UTC (Wed) by roc (subscriber, #30627)
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We're rendering everything, especially vector graphics, at the higher resolution. E.g. text that's 20 CSS pixels high gets rendered by rasterizing glyph curves at 40 device pixels high. We don't rasterize at 20 device pixels and then scale the result.