dev-lang/tcl:=

tk?
      ( dev-lang/tk:= )

dev-libs/double-conversion

freetype?
      ( media-libs/fontconfig media-libs/freetype:2 )

gles2-only?
      ( media-libs/libglvnd )

opengl?
      ( media-libs/libglvnd[X] )

X?
      ( x11-libs/libX11 )

examples?
      ( dev-qt/qtcore:5 dev-qt/qtgui:5 dev-qt/qtquickcontrols2:5 dev-qt/qtwidgets:5 dev-qt/qtxml:5 )

ffmpeg?
      ( <media-video/ffmpeg-5:= )

freeimage?
      ( media-libs/freeimage )

inspector?
      ( dev-qt/qtcore:5 dev-qt/qtgui:5 dev-qt/qtquickcontrols2:5 dev-qt/qtwidgets:5 dev-qt/qtxml:5 )

jemalloc?
      ( dev-libs/jemalloc )

tbb?
      ( dev-cpp/tbb:= )

vtk?
      ( dev-lang/tk:= sci-libs/vtk:=[rendering] tbb?
            ( sci-libs/vtk:=[tbb,-cuda] )
       )

dev-lang/tcl:=

tk?
      ( dev-lang/tk:= )

dev-libs/double-conversion

freetype?
      ( media-libs/fontconfig media-libs/freetype:2 )

gles2-only?
      ( media-libs/libglvnd )

opengl?
      ( media-libs/libglvnd[X] )

X?
      ( x11-libs/libX11 )

examples?
      ( dev-qt/qtcore:5 dev-qt/qtgui:5 dev-qt/qtquickcontrols2:5 dev-qt/qtwidgets:5 dev-qt/qtxml:5 )

ffmpeg?
      ( <media-video/ffmpeg-5:= )

freeimage?
      ( media-libs/freeimage )

inspector?
      ( dev-qt/qtcore:5 dev-qt/qtgui:5 dev-qt/qtquickcontrols2:5 dev-qt/qtwidgets:5 dev-qt/qtxml:5 )

jemalloc?
      ( dev-libs/jemalloc )

tbb?
      ( dev-cpp/tbb:= )

vtk?
      ( dev-lang/tk:= sci-libs/vtk:=[rendering] tbb?
            ( sci-libs/vtk:=[tbb,-cuda] )
       )