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@@ -1,5 +1,21 @@
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## Updates
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+- **16-Dec-2022**: In the sokol_gfx.h Metal backend: A fix for a Metal
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+ validation layer error which I just discovered yesterday (seems to be new in
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+ macOS 13). When the validation layer is active, and the application window
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+ becomes fully obscured, the validation layer throws an error after a short
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+ time (for details see: https://github.com/floooh/sokol/issues/762).
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+ The reason appears to be that sokol_gfx.h creates a command buffer with
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+ 'unretained references' (e.g. the command buffer doesn't manage the
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+ lifetime of resources used by the commands stored in the buffer). This
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+ seems to clash with MTKView's and/or CAMetalLayer's expectations. I fixed
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+ this now by creating a second command buffer with 'retained references',
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+ which only holds the ```presentDrawable``` command. That way, regular
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+ draw commands don't have the refcounting overhead (because they're stored
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+ in an unretained-references cmdbuffer), while the drawable surface is
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+ still properly lifetime managed (because it's used in a separate command
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+ buffer with retained references).
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+
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- **15-Dec-2022**: A small but important update in sokol_imgui.h which fixes
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touch input handling on mobile devices. Many thanks to github user @Xadiant
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for the bug investigation and [PR](https://github.com/floooh/sokol/pull/760).
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Andre Weissflog