Function SetupViewportDrawData

core/src/imgui/imgui.cpp:4341–4357

}

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++)
    {
        draw_data->TotalVtxCount += draw_lists->Data[n]->VtxBuffer.Size;
        draw_data->TotalIdxCount += draw_lists->Data[n]->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,