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I have been working on screen capture on iOS devices and system level API's like IOSurface, IOMobileFramebuffer etc. both out of interest and need. In extension to the answer mentioned in Creating an image out of the ios surface and saving it by Victor Ronnin, I had a question. As mentioned there, createScreenIOSurface API indeed works and provides the screen surface/ video buffer for use.

The new iPad (on which I am working) has a resolution of 2048 X 1536 and hence, createScreenIOSurface takes significant time. I had experimented a bit and found that these surfaces indeed support 1024 X 768 resolution (probably scaling happens and it happens real quick), so, with IOMobileFramebufferGetLayerDefaultSurface, you can obtain the screen surface at 1024 X 768 resolution and very quick. My question is there any analogous argument to createScreenIOSurface to obtain the surface at lower resolution ? Also, any inputs on how 1024 X 768 is supported by these displays would be helpful.

Thanks.

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Hrishikesh_Pardeshi
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    Take a look at this question: http://stackoverflow.com/questions/14343606/how-can-i-record-the-screen-with-acceptable-performance-while-keeping-the-ui-res – Victor Ronin Jan 20 '13 at 21:19
  • It's not an answer to your question, but it's information in the area, which are you are researching. – Victor Ronin Jan 20 '13 at 21:19

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