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    1. USBrad Larson
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    1. COThanks so much. Basically what you are saying is what Apple's RosyWriter example does. https://developer.apple.com/library/ios/#samplecode/RosyWriter/Introduction/Intro.html There is a big problem. OpenGL-ES EAGLContext switch from main thread to worker thread will need mutex to lock them to avoid hardware driver to render wrong result? B/c there is only 1 hardware resource. Everytime main thread/worker thread needs to draw, it must call [EAGLContext setCurrentContext:currentContext] That will become a bottleneck. Do you have a way to get around that problem?
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    2. CO@Howy - Well, technically, you can access the bytes from your pixel buffer in any thread, not just the one that is current for your OpenGL ES context. However, you'll notice if you do so that you'll get screen tearing when recording off of this buffer due to rendering taking place while your movie writer is reading the bytes from the pixel buffer. No matter what, you'll need to use a blocking `glFinish()` right before reading, on your rendering OpenGL ES context. For this, I use a serial dispatch queue and wrap my accessed to one OpenGL ES context in blocks dispatched to that queue.
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    3. COThis is extremely lightweight, and avoids expensive locks around a shared context. I use this in my image processing framework, as well as my molecular modeler, for operations that run at a smooth 60 FPS.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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