### - o -

- OpaqueShape : SDL_shape_internals.h
- ORG_KDE_KWIN_SERVER_DECORATION_MANAGER_MODE_CLIENT : org-kde-kwin-server-decoration-manager-client-protocol.h
- ORG_KDE_KWIN_SERVER_DECORATION_MANAGER_MODE_NONE : org-kde-kwin-server-decoration-manager-client-protocol.h
- ORG_KDE_KWIN_SERVER_DECORATION_MANAGER_MODE_SERVER : org-kde-kwin-server-decoration-manager-client-protocol.h
- ORG_KDE_KWIN_SERVER_DECORATION_MODE_CLIENT : org-kde-kwin-server-decoration-manager-client-protocol.h
- ORG_KDE_KWIN_SERVER_DECORATION_MODE_NONE : org-kde-kwin-server-decoration-manager-client-protocol.h
- ORG_KDE_KWIN_SERVER_DECORATION_MODE_SERVER : org-kde-kwin-server-decoration-manager-client-protocol.h
- OTHER_COLOR : edid.h
- SDL_ORIENTATION_LANDSCAPE : SDL_video.h
- SDL_ORIENTATION_LANDSCAPE_FLIPPED : SDL_video.h
- SDL_ORIENTATION_PORTRAIT : SDL_video.h
- SDL_ORIENTATION_PORTRAIT_FLIPPED : SDL_video.h
- SDL_ORIENTATION_UNKNOWN : SDL_video.h