RaybenchUniforms

The uniform block raybench marshals tuning into.

In the namespace raybench. Declared in src/libs/libraybench/raybench/Composer.hpp.

Detailed description

Mirrors RaybenchUniforms in the host preamble byte for byte (std140). Kept as a plain struct so the run loop can memcpy it into a QRhi uniform buffer, and so a change to the GLSL side that isn't mirrored here shows up as a compile error rather than as garbage pixels.