Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/glLoader/glLoader.cpp

@@ -0,0 +1,62 @@
+//
+//   Copyright 2020 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#include "glLoader.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+
+namespace OpenSubdiv {
+namespace internal {
+namespace GLLoader {
+
+
+bool
+applicationInitializeGL()
+{
+#if defined(OSD_USES_INTERNAL_GLAPILOADER)
+    // -- GLAPILOADER
+    return OpenSubdiv::internal::GLApi::glApiLoad();
+
+#elif defined(OSD_USES_GLEW)
+    // -- GLEW
+#define CORE_PROFILE
+#ifdef CORE_PROFILE
+    // this is the only way to initialize GLEW (before GLEW 1.13)
+    // correctly under core profile context.
+    glewExperimental = true;
+#endif
+    GLenum status = glewInit();
+    if (status != GLEW_OK) {
+        printf("Failed to initialize glew. Error = %s\n",
+               glewGetErrorString(status));
+        return false;
+    }
+#ifdef CORE_PROFILE
+    // clear GL errors which were generated during glewInit()
+    glGetError();
+#endif
+#endif
+    return true;
+}
+
+bool
+libraryInitializeGL()
+{
+#if defined(OSD_USES_INTERNAL_GLAPILOADER)
+    return OpenSubdiv::internal::GLApi::glApiLoad();
+#else
+    // otherwise do nothing
+    return true;
+#endif
+}
+
+
+}  // namespace GLLoader
+}  // namespace internal
+}  // namespace OpenSubdiv