Sdl Dpi awareness on Windows / multiple monitors about hello_imgui

[pthom]

Hi,

I cannot reproduce the issue on my side.

You told me that calling SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE); seems to fix the issue.

Can you confirm whether modifying hello_imgui/src/hello_imgui/internal/backend_impls/backend_window_helper/win32_dpi_awareness.cpp like this (removing two return) does solve the issue for you?

    // Helper function to enable DPI awareness without setting up a manifest
    void ImGui_ImplWin32_EnableDpiAwareness()
    {
        // Make sure monitors will be updated with latest correct scaling
        // if (ImGui_ImplWin32_Data* bd = ImGui_ImplWin32_GetBackendData())
        //    bd->WantUpdateMonitors = true;

        if (_IsWindows10OrGreater())
        {
            static HINSTANCE user32_dll = ::LoadLibraryA("user32.dll");  // Reference counted per-process
            if (PFN_SetThreadDpiAwarenessContext SetThreadDpiAwarenessContextFn =
                    (PFN_SetThreadDpiAwarenessContext)::GetProcAddress(user32_dll,
                                                                       "SetThreadDpiAwarenessContext"))
            {
                SetThreadDpiAwarenessContextFn(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
                return;      //         REMOVE THIS RETURN
            }
        }
        if (_IsWindows8Point1OrGreater())
        {
            static HINSTANCE shcore_dll = ::LoadLibraryA("shcore.dll");  // Reference counted per-process
            if (PFN_SetProcessDpiAwareness SetProcessDpiAwarenessFn =
                    (PFN_SetProcessDpiAwareness)::GetProcAddress(shcore_dll, "SetProcessDpiAwareness"))
            {
                SetProcessDpiAwarenessFn(PROCESS_PER_MONITOR_DPI_AWARE);
                return;      //         REMOVE THIS RETURN ??
            }
        }
#if _WIN32_WINNT >= 0x0600
        ::SetProcessDPIAware();
#endif
    }