Add DPI scaling to IMGUI

Signed-off-by: nvsickle <nvsickle@amazon.com>
2021-06-21 22:15:39 -07:00
parent 0c97888d0f
commit dd20a598b2
10 changed files with 58 additions and 2 deletions
@@ -105,10 +105,20 @@ namespace AZ
                // Let our ImguiAtomSystemComponent know once we successfully connect and update the viewport size.
                if (!m_initialized)
                {
+                    auto atomViewportRequests = AZ::Interface<AZ::RPI::ViewportContextRequestsInterface>::Get();
+                    auto defaultViewportContext = atomViewportRequests->GetDefaultViewportContext();
+                    OnViewportDpiScalingChanged(defaultViewportContext->GetDpiScalingFactor());
                    m_initialized = true;
                }
            });
-#endif
+#endif //define(IMGUI_ENABLED)
+        }
+
+        void ImguiAtomSystemComponent::OnViewportDpiScalingChanged(float dpiScale)
+        {
+#if defined(IMGUI_ENABLED)
+            ImGui::ImGuiManagerBus::Broadcast(&ImGui::ImGuiManagerBus::Events::SetDpiScalingFactor, dpiScale);
+#endif //define(IMGUI_ENABLED)
        }
    }
 }