The GLSL Hacker demo creates a 800×600 window: Just for fun, here is an overview of the different resolutions. As soon as the rendering load increases, the difference in performance between scaled and natives modes decreases and there’s no longer difference with heavy load. The test scene is a rendering of some cells with the raymarching technique and can be found in the GLSL_Shadertoy/ folder of the code sample pack (cells.xml).Īs we can see, best performance is for native resolution and there is a clear performance penalty in scaled modes but only when the rendering load is light. A GLSL shader performs a vertex displacement from a 3D surface equation on a 50×50-vertex grid mesh.Ģ.3 – Heavy graphics workload: Raymarching scene The test scene can be found in the Graph3D/ folder of the code sample pack. The scene is a simple triangle.Ģ.2 – Medium graphics workload: 3D surface with a mesh plane made up of 50×50 vertices The test scene can be found in the LuaGL/ folder of the code sample pack. I used GLSL Hacker with three different scenes from the Code Sample Pack.Ģ.1 – Light graphics workload: simple triangle rendering I did three tests: one with very light graphics workload, a second with a medium workload and a third with heavy workload. So let’s see how scaled modes impact the rendering performances. Scaled modes bring visual improvements but there is a price: rendering performance ( OpenGL) of graphics applications can suffer from non-native modes. It even offers the possibility to set a resolution higher than 2880×1800 like 3840×2400… The text is just microscopic but thanks to the quality of the retina display, we can still read it, a bit tough task I agree… QuickRes is a free application for OS X and is very easy to use. To switch the Retina screen in native mode, I use this cool utility: QuickRes. That’s why the MacBook Pro uses scaled resolutions (1440×900, 1920×1200, etc) to bring visual comfort to the user.Īpple does not provide a way to select the native resolution (why?) so we have to use some tools available on the net to do the job. This resolution is a scaled resolution because the retina monitor has a native resolution of 2880×1800 pixels (the MacBook Pro Retina 13-inch has a native resolution of 2560×1600)… This resolution is so high that you can’t use it for every day work on a 15-inch screen. By default, the screen resolution of the MacBook Pro Retina 15-inch is 1440×900.
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