Route VR render state through renderer GL

src/renderer_gl/opengl_capabilities.cpp

@@ -326,6 +326,35 @@ pp::foundation::Status apply_opengl_scissor_test(
     return pp::foundation::Status::success();
 }
 
+pp::foundation::Status apply_opengl_capability(
+    std::uint32_t state,
+    bool enabled,
+    OpenGlCapabilityDispatch dispatch) noexcept
+{
+    if (dispatch.enable == nullptr || dispatch.disable == nullptr) {
+        return pp::foundation::Status::invalid_argument("OpenGL capability dispatch callbacks must not be null");
+    }
+
+    if (enabled) {
+        dispatch.enable(state);
+    } else {
+        dispatch.disable(state);
+    }
+    return pp::foundation::Status::success();
+}
+
+pp::foundation::Status clear_opengl_buffers(
+    std::uint32_t mask,
+    OpenGlBufferClearDispatch dispatch) noexcept
+{
+    if (dispatch.clear == nullptr) {
+        return pp::foundation::Status::invalid_argument("OpenGL buffer clear dispatch callback must not be null");
+    }
+
+    dispatch.clear(mask);
+    return pp::foundation::Status::success();
+}
+
 std::uint32_t extension_count_query() noexcept
 {
     return gl_num_extensions;