Vulkan: SPIR-V Gen: Unary operators The line raster emulation coded uses round() which was previously not translated. This change implements all operations supported by TIntermUnary nodes. Bresenham line emulation is now allowed. Bug: angleproject:4889 Change-Id: I1ffbe3f9bf0299f7efa2c6d1e8f011fefdbb2ddb Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2951624 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>