Clarify the ICD/loader compatibility
Bug: b/149490161
Change-Id: I15f009d69ddb0725f8171f728195fbf94059c6e7
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/49928
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
diff --git a/README.md b/README.md
index 3654bfc..0f7f40a 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@
On Windows, most applications can be made to use SwiftShader's DLLs by placing them in the same folder as the executable. On Linux, the `LD_LIBRARY_PATH` environment variable or `-rpath` linker option can be used to direct applications to search for shared libraries in the indicated directory first.
-In general, Vulkan applications look for a shared library named `vulkan-1.dll` on Windows (`vulkan-1.so` on Linux). SwiftShader's equivalent is named `libvk_swiftshader.dll`, which can be renamed to `vulkan-1.dll`. Alternatively, you can set the `VK_ICD_FILENAMES` environment variable to the path to `vk_swiftshader_icd.json` file that is generated under the build directory (e.g. `.\SwiftShader\build\Windows\vk_swiftshader_icd.json`). To learn more about how Vulkan loading works, read the [official documentation here](https://github.com/KhronosGroup/Vulkan-Loader/blob/master/loader/LoaderAndLayerInterface.md).
+In general, Vulkan applications look for a shared library named `vulkan-1.dll` on Windows (`vulkan-1.so` on Linux). This 'loader' library then redirects API calls to the actual Installable Client Driver (ICD). SwiftShader's ICD is named `libvk_swiftshader.dll`, but it can be renamed to `vulkan-1.dll` to be loaded directly by the application. Alternatively, you can set the `VK_ICD_FILENAMES` environment variable to the path to `vk_swiftshader_icd.json` file that is generated under the build directory (e.g. `.\SwiftShader\build\Windows\vk_swiftshader_icd.json`). To learn more about how Vulkan loading works, read the [official documentation here](https://github.com/KhronosGroup/Vulkan-Loader/blob/master/loader/LoaderAndLayerInterface.md).
Contributing
------------
