commit affb7a3ab91d72eb791053ef5d0e1d80261f57a2
author Ben Clayton <bclayton@google.com> Tue Sep 28 11:14:42 2021 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> Tue Sep 28 11:14:42 2021 +0000
tree dcb0d4c9020014dd7acd2384d1a87b7eb42eb90e
parent 897cdeeb61f93040e5b6859a1a592d3dbef4285a

dawn_node: Begin working on the CMake rules

This is enough to compile the interop code. This doesn't do anything as we need to emit the NodeJS module entry point, and actually hook up the interop to the Dawn bindings.
This comes next.

Bug: dawn:1123
Change-Id: I754b4bcb0532c8446031622d8e8e64e2faaff585
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/64903
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a8eaf33..5aa4e67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -115,6 +115,9 @@
 option_if_not_defined(DAWN_USE_X11 "Enable support for X11 surface" ${USE_X11})
 
 option_if_not_defined(DAWN_BUILD_EXAMPLES "Enables building Dawn's exmaples" ${BUILD_EXAMPLE})
+option_if_not_defined(DAWN_BUILD_NODE_BINDINGS "Enables building Dawn's NodeJS bindings" OFF)
+
+option_if_not_defined(DAWN_ENABLE_PIC "Build with Position-Independent-Code enabled" OFF)
 
 set_if_not_defined(DAWN_THIRD_PARTY_DIR "${Dawn_SOURCE_DIR}/third_party" "Directory in which to find third-party dependencies.")
 
@@ -130,6 +133,11 @@
 set_if_not_defined(DAWN_SPIRV_TOOLS_DIR "${DAWN_THIRD_PARTY_DIR}/vulkan-deps/spirv-tools/src" "Directory in which to find SPIRV-Tools")
 set_if_not_defined(DAWN_TINT_DIR "${DAWN_THIRD_PARTY_DIR}/tint" "Directory in which to find Tint")
 
+# Dependencies for DAWN_BUILD_NODE_BINDINGS
+set_if_not_defined(NODE_ADDON_API_DIR "${DAWN_THIRD_PARTY_DIR}/node-addon-api" "Directory in which to find node-addon-api")
+set_if_not_defined(NODE_API_HEADERS_DIR "${DAWN_THIRD_PARTY_DIR}/node-api-headers/include" "Directory in which to find node-api-headers")
+set_if_not_defined(WEBGPU_IDL_PATH "${DAWN_THIRD_PARTY_DIR}/gpuweb/webgpu.idl" "Path to the webgpu.idl definition file")
+
 # Much of the backend code is shared among desktop OpenGL and OpenGL ES
 if (${DAWN_ENABLE_DESKTOP_GL} OR ${DAWN_ENABLE_OPENGLES})
     set(DAWN_ENABLE_OPENGL ON)
@@ -141,6 +149,10 @@
     set(DAWN_REQUIRES_SPIRV_CROSS ON)
 endif()
 
+if(DAWN_ENABLE_PIC)
+    set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+endif()
+
 ################################################################################
 # Dawn's public and internal "configs"
 ################################################################################
@@ -213,3 +225,25 @@
     #add_subdirectory(src/utils)
     add_subdirectory(examples)
 endif()
+
+if (DAWN_BUILD_NODE_BINDINGS)
+    set(NODE_BINDING_DEPS
+        ${NODE_ADDON_API_DIR}
+        ${NODE_API_HEADERS_DIR}
+        ${WEBGPU_IDL_PATH}
+    )
+    foreach(DEP ${NODE_BINDING_DEPS})
+        if (NOT EXISTS ${DEP})
+            message(FATAL_ERROR
+                "DAWN_BUILD_NODE_BINDINGS requires missing dependency '${DEP}'\n"
+                "Try running:\n"
+                "gclient sync --gclientfile=scripts/standalone-with-node.gclient"
+            )
+        endif()
+    endforeach()
+    if (NOT CMAKE_POSITION_INDEPENDENT_CODE)
+        message(FATAL_ERROR "DAWN_BUILD_NODE_BINDINGS requires building with DAWN_ENABLE_PIC")
+    endif()
+
+    add_subdirectory(src/dawn_node)
+endif()