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third_party/imgui/examples/example_qnx_vulkan/README.md

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+# Dear ImGui QNX Screen + Vulkan example
+
+This example uses:
+
+- `imgui_impl_qnx.cpp` as the QNX Screen platform backend
+- the unmodified `imgui_impl_vulkan.cpp` renderer backend
+- `vkCreateScreenSurfaceQNX()` and `VK_QNX_screen_surface`
+
+No separate Screen/Vulkan renderer backend is required. The QNX-specific work
+is limited to the Screen platform backend, native window setup, and Vulkan WSI
+surface creation.
+
+## Build
+
+Load the QNX SDP environment, then run:
+
+```sh
+cd examples/example_qnx_vulkan
+make
+```
+
+The build defines `VK_USE_PLATFORM_SCREEN_QNX` and links `libvulkan` and
+`libscreen`.
+
+## Input and resize
+
+The application forwards Screen input events to `ImGui_ImplQNX_ProcessEvent()`.
+It recreates the Vulkan swapchain when the Screen window size changes or Vulkan
+reports `VK_ERROR_OUT_OF_DATE_KHR` / `VK_SUBOPTIMAL_KHR`. Escape exits.