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ImGuiPlatformIO_Set_Platform_GetWindowPos_OutParam

dear_imgui_sys

Function ImGuiPlatformIO_Set_Platform_GetWindowPos_OutParam 

Source 
pub unsafe fn ImGuiPlatformIO_Set_Platform_GetWindowPos_OutParam(
    platform_io: *mut ImGuiPlatformIO,
    user_callback: Option<unsafe extern "C" fn(vp: *mut ImGuiViewport, out_pos: *mut ImVec2)>,
)
Expand description

Install a C-compatible out-parameter callback for ImGuiPlatformIO::Platform_GetWindowPos.

This avoids exposing Rust callbacks through the small-aggregate ImVec2 return ABI used by Dear ImGui’s C++ callback slot. The shim keeps its own per-ImGuiPlatformIO storage and does not occupy ImGuiIO::BackendLanguageUserData.

§Safety

platform_io must be null or point to a live ImGuiPlatformIO. user_callback, when present, must obey Dear ImGui’s platform callback contract and must not unwind.