Method RenderWindowOuterBorders

ImGUI GLFW Tutorial/imgui/imgui.cpp:5506–5528

}

static void ImGui::RenderWindowOuterBorders(ImGuiWindow* window)
{
    ImGuiContext& g = *GImGui;
    float rounding = window->WindowRounding;
    float border_size = window->WindowBorderSize;
    if (border_size > 0.0f && !(window->Flags & ImGuiWindowFlags_NoBackground))
        window->DrawList->AddRect(window->Pos, window->Pos + window->Size, GetColorU32(ImGuiCol_Border), rounding, 0, border_size);

    int border_held = window->ResizeBorderHeld;
    if (border_held != -1)
    {
        const ImGuiResizeBorderDef& def = resize_border_def[border_held];
        ImRect border_r = GetResizeBorderRect(window, border_held, rounding, 0.0f);
        window->DrawList->PathArcTo(ImLerp(border_r.Min, border_r.Max, def.SegmentN1) + ImVec2(0.5f, 0.5f) + def.InnerDir * rounding, rounding, def.OuterAngle - IM_PI * 0.25f, def.OuterAngle);
        window->DrawList->PathArcTo(ImLerp(border_r.Min, border_r.Max, def.SegmentN2) + ImVec2(0.5f, 0.5f) + def.InnerDir * rounding, rounding, def.OuterAngle, def.OuterAngle + IM_PI * 0.25f);
        window->DrawList->PathStroke(GetColorU32(ImGuiCol_SeparatorActive), 0, ImMax(2.0f, border_size)); // Thicker than usual
    }
    if (g.Style.FrameBorderSize > 0 && !(window->Flags & ImGuiWindowFlags_NoTitleBar))
    {
        float y = window->Pos.y + window->TitleBarHeight() - 1;
        window->DrawList->AddLine(ImVec2(window->Pos.x + border_size, y), ImVec2(window->Pos.x + window->Size.x - border_size, y), GetColorU32(ImGuiCol_Border), g.Style.FrameBorderSize);
    }
}

// Draw background and borders
// Draw and handle scrollbars