Supported Environment Calls¶

This page lists the environment calls supported by libretro.py and the driver interfaces that handle them.

Note

The presence of an envcall on this table only implies that it has a driver protocol and at least one implementation that’s usable for testing.

This does not mean that the driver uses actual hardware resources; it just means that the driver is able to convince the core that it does.

Environment Call	Implementation
`SET_ROTATION`	`VideoDriver.rotation`
`GET_OVERSCAN`	`CompositeEnvironmentDriver.overscan`
`GET_CAN_DUPE`	`VideoDriver.can_dupe`
`SET_MESSAGE`	`MessageDriver.set_message()`
`SHUTDOWN`	`CompositeEnvironmentDriver.is_shutdown`
`SET_PERFORMANCE_LEVEL`	`CompositeEnvironmentDriver.performance_level`
`GET_SYSTEM_DIRECTORY`	`PathDriver.system_dir`
`SET_PIXEL_FORMAT`	`VideoDriver.pixel_format`
`SET_INPUT_DESCRIPTORS`	`InputDriver.descriptors`
`SET_KEYBOARD_CALLBACK`	`InputDriver.keyboard_callback`
`SET_DISK_CONTROL_INTERFACE`	Not supported
`SET_HW_RENDER`	`VideoDriver.set_context()`
`GET_VARIABLE`	`OptionDriver.get_variable()`
`SET_VARIABLES`	`OptionDriver.set_variables()`
`GET_VARIABLE_UPDATE`	`OptionDriver.variable_updated`
`SET_SUPPORT_NO_GAME`	`ContentDriver.support_no_game`
`GET_LIBRETRO_PATH`	`PathDriver.libretro_path`
`SET_FRAME_TIME_CALLBACK`	`TimingDriver.frame_time_callback`
`SET_AUDIO_CALLBACK`	`AudioDriver.callbacks`
`GET_RUMBLE_INTERFACE`	`RumbleDriver.set_rumble_state()`
`GET_INPUT_DEVICE_CAPABILITIES`	`InputDriver.device_capabilities`
`GET_SENSOR_INTERFACE`	`SensorDriver`
`GET_CAMERA_INTERFACE`	Not supported
`GET_LOG_INTERFACE`	`LogDriver`
`GET_PERF_INTERFACE`	`PerfDriver`
`GET_LOCATION_INTERFACE`	Not supported
`GET_CORE_ASSETS_DIRECTORY`	`PathDriver.core_assets_dir`
`GET_SAVE_DIRECTORY`	`PathDriver.save_dir`
`SET_SYSTEM_AV_INFO`	`AudioDriver.system_av_info`, `VideoDriver.system_av_info`
`SET_PROC_ADDRESS_CALLBACK`	`CompositeEnvironmentDriver.proc_address_callback`
`SET_SUBSYSTEM_INFO`	`ContentDriver.subsystem_info`
`SET_CONTROLLER_INFO`	`InputDriver.controller_info`
`SET_MEMORY_MAPS`	`CompositeEnvironmentDriver.memory_maps`
`SET_GEOMETRY`	`VideoDriver.geometry`
`GET_USERNAME`	`UserDriver.username`
`GET_LANGUAGE`	`UserDriver.language`
`GET_CURRENT_SOFTWARE_FRAMEBUFFER`	`VideoDriver.get_software_framebuffer()`
`GET_HW_RENDER_INTERFACE`	`VideoDriver.hw_render_interface`
`SET_SUPPORT_ACHIEVEMENTS`	`CompositeEnvironmentDriver.support_achievements`
`SET_HW_RENDER_CONTEXT_NEGOTIATION_INTERFACE`	Not supported
`SET_SERIALIZATION_QUIRKS`	`CompositeEnvironmentDriver.serialization_quirks`
`SET_HW_SHARED_CONTEXT`	`VideoDriver.shared_context`
`GET_VFS_INTERFACE`	`FileSystemDriver`
`GET_LED_INTERFACE`	`LedDriver.set_led_state()`
`GET_AUDIO_VIDEO_ENABLE`	`CompositeEnvironmentDriver.av_enable`
`GET_MIDI_INTERFACE`	`MidiDriver`
`GET_FASTFORWARDING`	`TimingDriver.throttle_state`
`GET_TARGET_REFRESH_RATE`	`TimingDriver.target_refresh_rate`
`GET_INPUT_BITMASKS`	`InputDriver.bitmasks_supported`
`GET_CORE_OPTIONS_VERSION`	`OptionDriver.version`
`SET_CORE_OPTIONS`	`OptionDriver.set_options()`
`SET_CORE_OPTIONS_INTL`	`OptionDriver.set_options_intl()`
`SET_CORE_OPTIONS_DISPLAY`	`OptionDriver.set_display()`
`GET_PREFERRED_HW_RENDER`	`VideoDriver.preferred_context`
`GET_DISK_CONTROL_INTERFACE_VERSION`	Not supported
`SET_DISK_CONTROL_EXT_INTERFACE`	Not supported
`GET_MESSAGE_INTERFACE_VERSION`	`MessageDriver.version`
`SET_MESSAGE_EXT`	`MessageDriver.set_message()`
`GET_INPUT_MAX_USERS`	`InputDriver.max_users`
`SET_AUDIO_BUFFER_STATUS_CALLBACK`	`AudioDriver.buffer_status`
`SET_MINIMUM_AUDIO_LATENCY`	`AudioDriver.minimum_latency`
`SET_FASTFORWARDING_OVERRIDE`	`TimingDriver.fastforwarding_override`
`SET_CONTENT_INFO_OVERRIDE`	`ContentDriver.overrides`
`GET_GAME_INFO_EXT`	`ContentDriver.game_info_ext`
`SET_CORE_OPTIONS_V2`	`OptionDriver.set_options_v2()`
`SET_CORE_OPTIONS_V2_INTL`	`OptionDriver.set_options_v2_intl()`
`SET_CORE_OPTIONS_UPDATE_DISPLAY_CALLBACK`	`OptionDriver.update_display_callback`
`SET_VARIABLE`	`OptionDriver.set_variable()`
`GET_THROTTLE_STATE`	`TimingDriver.throttle_state`
`GET_SAVESTATE_CONTEXT`	`CompositeEnvironmentDriver.savestate_context`
`GET_HW_RENDER_CONTEXT_NEGOTIATION_INTERFACE_SUPPORT`	Not supported
`GET_JIT_CAPABLE`	`CompositeEnvironmentDriver.jit_capable`
`GET_MICROPHONE_INTERFACE`	`MicrophoneDriver`
`SET_NETPACKET_INTERFACE`	Not supported
`GET_DEVICE_POWER`	`PowerDriver.device_power`
`GET_PLAYLIST_DIRECTORY`	`PathDriver.playlist_dir`
`GET_FILE_BROWSER_START_DIRECTORY`	`PathDriver.file_browser_start_dir`