04166ea0ea
For metal version after 3.2 it's possible to log debugging messages, it works similar to `printf()`, except for a few differences: - `%s` is not supported, - `double` doesn't exist, so no casting to double for `%f`, - no `\n` needed at the end of the format string. To see the print in the console, environment variables `MTL_LOG_LEVEL` should be set to `MTLLogLevelDebug`, and `MTL_LOG_TO_STDERR` should be set to `1`. See https://developer.apple.com/documentation/metal/logging-shader-debug-messages Right now `printf()`, `print_float()`, `print_float2()`, `print_float3()` and `print_float4()` are supported. Thanks to @fclem for finding this out. Pull Request: https://projects.blender.org/blender/blender/pulls/146585
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