Function SetupViewportDrawData

tutorials/common/imgui/imgui.cpp:5005–5023

}

static void SetupViewportDrawData(ImGuiViewportP* viewport, ImVector<ImDrawList*>* draw_lists)
{
    ImGuiIO& io = ImGui::GetIO();
    ImDrawData* draw_data = &viewport->DrawDataP;
    draw_data->Valid = true;
    draw_data->CmdLists = (draw_lists->Size > 0) ? draw_lists->Data : NULL;
    draw_data->CmdListsCount = draw_lists->Size;
    draw_data->TotalVtxCount = draw_data->TotalIdxCount = 0;
    draw_data->DisplayPos = viewport->Pos;
    draw_data->DisplaySize = viewport->Size;
    draw_data->FramebufferScale = io.DisplayFramebufferScale;
    for (int n = 0; n < draw_lists->Size; n++)
    {
        ImDrawList* draw_list = draw_lists->Data[n];
        draw_list->_PopUnusedDrawCmd();
        draw_data->TotalVtxCount += draw_list->VtxBuffer.Size;
        draw_data->TotalIdxCount += draw_list->IdxBuffer.Size;
    }
}

// Push a clipping rectangle for both ImGui logic (hit-testing etc.) and low-level ImDrawList rendering.
// - When using this function it is sane to ensure that float are perfectly rounded to integer values,