Mobile

• Samsung - Mobile best practices .

  • TLDR :

    • presentMode :

      • FIFO > MAILBOX.

    • minImageCount :

      • Triple-buffer > double-buffer.

    • preTransform :

      • Not covered.

      • "Covered in a future post", but the link is broken.

• Arm - Mobile Best Practices .

  • It's a more technical video.

  • Tiled-based GPUs, etc.

  • I haven't watched it yet.

• See pages 244 to 311 of Efficient Real-Time Shading with Many Lights - Ola Olsson, Emil Persson (Avalanche), Markus Billeter - 2014  for more details.

  • "Many Light Rendering on Mobile Hardware".

• Live Long and Optimise - Samsung 2019 .

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  • Android ideas for fixing Present blocking :

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    • "This is not going to change when the image is presented, we are just delaying the calling of the function that would display the image, to a point where the image is more likely to be available by the GPU".

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  • (2025-09-29) I watched it to study Pipeline Barriers, but the talk covers many mobile-specific topics.

GLFW

• An unfortunate disadvantage is GLFW doesn’t work in Android or iOS; it is a desktop-only solution.

• SDL does offer mobile support; however, mobile windowing support is best done by interfacing with the Operating system such as using the JNI  in Android.

• While mobile is beyond the scope of this initial tutorial, plans exist to eventually cover it in detail, and Google has excellent documentation .

Pre-Rotation

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  • You can only query surfaceCapabilities.currentTransform , you cannot set it.

  • If they don't match, the presentation engine will have to do the pre-rotation for you, which has a performance cost.

• Implementing a full pre-rotate system is reportedly difficult, so many engines avoid it.

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  • This is a simpler option to implement.

  • "Many engines already do a blit to the final image to the swapchain image, so this is the perfect place to do the pre-rotation".

    • "Basically free and you get performance benefits".