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:

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.