Use Wasm backend (via ORT Web) for Scala.js backend

Author: EmergentOrder

README.md

@@ -123,10 +123,10 @@ Supported ONNX input and output tensor data types:
 * String
 
 Supported ONNX ops:
-* ONNX-Scala, Fine-grained API: 87/178 total (69/178 when using Scala.js / ORT Web backend)
-* ONNX-Scala, Full model API: Same as below, depending on backend
+* ONNX-Scala, Fine-grained API: 87/178 total
+* ONNX-Scala, Full model API: Same as below
 
-* ONNX Runtime Web (using WebGL backend): 69/178 total.
+* ONNX Runtime Web (using Wasm backend): 165/178 total.
 * ONNX Runtime: 165/178 total
 
 See the [ONNX backend scoreboard](http://onnx.ai/backend-scoreboard/index.html) 

backends/.js/src/main/scala/ORTWebOperatorBackend.scala

@@ -40,7 +40,7 @@ trait ORTWebOperatorBackend extends OpToONNXBytesConverter {
         InferenceSession
       ] = IO.fromFuture(IO { OrtSession.create(bytesArrayBuffer, {
         val opts = InferenceSession.SessionOptions()
-        opts.executionProviders = scala.scalajs.js.Array("webgl")
+        opts.executionProviders = scala.scalajs.js.Array("wasm")
         opts
       }
       ).toFuture })

backends/.js/src/test/scala/SqueezeNetTest.scala

@@ -16,6 +16,7 @@ import org.scalatest.flatspec.AsyncFlatSpec
 import org.scalatest.freespec.AsyncFreeSpec
 import org.scalatest.matchers.should._
 import cats.effect.testing.scalatest.AsyncIOSpec
+import org.emergentorder.onnx.onnxruntimeCommon.inferenceSessionMod.InferenceSession
 
 class ONNXScalaSpec extends AsyncFreeSpec with AsyncIOSpec with Matchers {
 
@@ -24,7 +25,13 @@ class ONNXScalaSpec extends AsyncFreeSpec with AsyncIOSpec with Matchers {
    // TODO: push this inside ORTWebModelBackend, and use other create() which takes arraybufferlike
    val session: IO[
      org.emergentorder.onnx.onnxruntimeCommon.inferenceSessionMod.InferenceSession
-   ] = IO.fromFuture(IO { OrtSession.create("squeezenet1.0-12.onnx").toFuture })
+   ] = IO.fromFuture(IO { OrtSession.create("squeezenet1.0-12.onnx",
+      {
+        val opts = InferenceSession.SessionOptions()
+        opts.executionProviders = scala.scalajs.js.Array("wasm")
+        opts
+      }
+      ).toFuture })
 
    "SqueezeNet ONNX-Scala model should predict dummy image class" in {
       val squeezenet = new ORTWebModelBackend(session)