Add slang-wasm target (#5237)

Support for exceptions is enabled, since Slang uses them for diagnostics.
The size optimization arguments ('-Os') resolves some internal emscripten error during the
slang-wasm.wasm linking step, which happens when enabling exceptions.
("parse exception: too many locals")

1 files changed, 59 insertions, 0 deletions

diff --git a/source/slang-wasm/slang-wasm-bindings.cpp b/source/slang-wasm/slang-wasm-bindings.cpp
new file mode 100644
index 000000000..4880596a9
--- /dev/null
+++ b/source/slang-wasm/slang-wasm-bindings.cpp
@@ -0,0 +1,59 @@
+#include <emscripten/bind.h>
+#include <slang-com-ptr.h>
+#include "slang-wasm.h"
+
+using namespace emscripten;
+
+EMSCRIPTEN_BINDINGS(slang)
+{
+    constant("SLANG_OK", SLANG_OK);
+
+    function(
+        "createGlobalSession",
+        &slang::wgsl::createGlobalSession,
+        return_value_policy::take_ownership());
+
+    function(
+        "getLastError",
+        &slang::wgsl::getLastError);
+
+    class_<slang::wgsl::GlobalSession>("GlobalSession")
+        .function(
+            "createSession",
+            &slang::wgsl::GlobalSession::createSession,
+            return_value_policy::take_ownership());
+
+    class_<slang::wgsl::Session>("Session")
+        .function(
+            "loadModuleFromSource",
+            &slang::wgsl::Session::loadModuleFromSource,
+            return_value_policy::take_ownership())
+        .function(
+            "createCompositeComponentType",
+            &slang::wgsl::Session::createCompositeComponentType,
+            return_value_policy::take_ownership());
+
+    class_<slang::wgsl::ComponentType>("ComponentType")
+        .function(
+            "link",
+            &slang::wgsl::ComponentType::link,
+            return_value_policy::take_ownership())
+        .function(
+            "getEntryPointCode",
+            &slang::wgsl::ComponentType::getEntryPointCode);
+
+    class_<slang::wgsl::Module, base<slang::wgsl::ComponentType>>("Module")
+        .function(
+            "findEntryPointByName",
+            &slang::wgsl::Module::findEntryPointByName,
+            return_value_policy::take_ownership());
+
+    value_object<slang::wgsl::Error>("Error")
+        .field("type", &slang::wgsl::Error::type)
+        .field("result", &slang::wgsl::Error::result)
+        .field("message", &slang::wgsl::Error::message);
+
+    class_<slang::wgsl::EntryPoint, base<slang::wgsl::ComponentType>>("EntryPoint");
+
+    register_vector<slang::wgsl::ComponentType*>("ComponentTypeList");
+}