Add ImPlatformIO, ImGuiViewport

imgui-binding/src/main/java/imgui/callback/ImPlatformFuncViewportSuppImVec2.java

@@ -0,0 +1,11 @@
+package imgui.callback;
+
+import imgui.ImGuiViewport;
+import imgui.ImVec2;
+
+/**
+ * Callback to represent ImGuiPlatformIO function with args: (ImGuiViewport*) -> ImVec2
+ */
+public abstract class ImPlatformFuncViewportSuppImVec2 {
+    public abstract void get(ImGuiViewport vp, ImVec2 dstImVec2);
+}