Route render target binding through platform services

src/platform_windows/windows_platform_services.cpp

@@ -250,6 +250,18 @@ public:
         win32_async_swap();
     }
 
+    void bind_default_render_target() override
+    {
+        glBindFramebuffer(
+            static_cast<GLenum>(pp::renderer::gl::framebuffer_target()),
+            pp::renderer::gl::default_framebuffer_id());
+    }
+
+    void bind_main_render_target() override
+    {
+        bind_default_render_target();
+    }
+
     void begin_render_capture_frame() override
     {
         win32_renderdoc_frame_start();