OpenCLOn12 is a mapping layer, which implements the OpenCL 1.2 API on top of D3D12. It also implements the OpenCL ICD extension, and can therefore be loaded by the existing ICD loader.

OpenCLOn12 is very much still a work in progress.

This repository contains the implementations of the APIs. It depends on various other repositories for further functionality, either implicitly or explicitly:

• WIL is used occasionally throughout.
• The OpenCL headers are referenced.
• GoogleTest is used for unit testing.
• The D3D12TranslationLayer handles some of the complexity of using D3D12 for us.
• The compiler infrastructure for consuming OpenCL C and SPIR-V and converting to DXIL comes from the Mesa project. This dependency is only required at runtime, as a copy of the compiler interface header is contained in this repo.

Additionally, DXIL.dll from the Windows SDK will be required at runtime to sign and validate the DXIL shaders produced by the compiler.

For more details about OpenCLOn12, see:

• Microsoft blog post
• Collabora blog post

At this point, the OpenCL 1.2 API is fully implemented, with no optional extensions.

This project is expected to be included in a CMake build environment where the D3D12TranslationLayer project is also included.

At the time of publishing, OpenCLOn12 and the D3D12TranslationLayer require the latest released version of the SDK (19041).

An example CMakeLists.txt for building OpenCLOn12 would be:

cmake_minimum_required(VERSION 3.13)
add_subdirectory(D3D12TranslationLayer)
add_subdirectory(OpenCLOn12)

OpenCLOn12 requires C++17, and only supports building with MSVC at the moment.

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Note however that no data collection is performed when using your private builds.