[HTML5] Add WebGL2 (GLES3) support using the OpenGL renderer.

Note, the editor build requires the mbedtls module to be manually
enabled, as it is currently needed as a ResourceUID dependency.

This will need to be addressed in a separate PR.

1 files changed, 7 insertions, 14 deletions

diff --git a/platform/javascript/detect.py b/platform/javascript/detect.py
index 891ae419bd..b57f3b3f16 100644
--- a/platform/javascript/detect.py
+++ b/platform/javascript/detect.py
@@ -180,6 +180,13 @@ def configure(env):
     env.Prepend(CPPPATH=["#platform/javascript"])
     env.Append(CPPDEFINES=["JAVASCRIPT_ENABLED", "UNIX_ENABLED"])
 
+    if env["opengl3"]:
+        env.AppendUnique(CPPDEFINES=["GLES3_ENABLED"])
+        # This setting just makes WebGL 2 APIs available, it does NOT disable WebGL 1.
+        env.Append(LINKFLAGS=["-s", "USE_WEBGL2=1"])
+        # Allow use to take control of swapping WebGL buffers.
+        env.Append(LINKFLAGS=["-s", "OFFSCREEN_FRAMEBUFFER=1"])
+
     if env["javascript_eval"]:
         env.Append(CPPDEFINES=["JAVASCRIPT_EVAL_ENABLED"])
 
@@ -218,25 +225,11 @@ def configure(env):
     # us since we don't know requirements at compile-time.
     env.Append(LINKFLAGS=["-s", "ALLOW_MEMORY_GROWTH=1"])
 
-    # This setting just makes WebGL 2 APIs available, it does NOT disable WebGL 1.
-    env.Append(LINKFLAGS=["-s", "USE_WEBGL2=1"])
-
     # Do not call main immediately when the support code is ready.
     env.Append(LINKFLAGS=["-s", "INVOKE_RUN=0"])
 
-    # Allow use to take control of swapping WebGL buffers.
-    env.Append(LINKFLAGS=["-s", "OFFSCREEN_FRAMEBUFFER=1"])
-
     # callMain for manual start, cwrap for the mono version.
     env.Append(LINKFLAGS=["-s", "EXPORTED_RUNTIME_METHODS=['callMain','cwrap']"])
 
     # Add code that allow exiting runtime.
     env.Append(LINKFLAGS=["-s", "EXIT_RUNTIME=1"])
-
-    # TODO remove once we have GLES support back (temporary fix undefined symbols due to dead code elimination).
-    env.Append(
-        LINKFLAGS=[
-            "-s",
-            "EXPORTED_FUNCTIONS=['_main', '_emscripten_webgl_get_current_context']",
-        ]
-    )