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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| use std::{env, ffi::c_void, fs}; | ||
|
|
||
| use anyhow::bail; | ||
| use libloading::{Library, Symbol}; | ||
| use serde::Deserialize; | ||
|
|
||
| #[repr(C)] | ||
| #[derive(Default, Debug)] | ||
| struct MndPose { | ||
| orientation: [f32; 4], | ||
| position: [f32; 3], | ||
| } | ||
|
|
||
| const MND_REFERENCE_TYPE_STAGE: i32 = 3; | ||
|
|
||
| const MND_SUCCESS: i32 = 0; | ||
| const MND_ERROR_BAD_SPACE_TYPE: i32 = -7; | ||
|
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| type GetDeviceCount = extern "C" fn(*mut c_void, *mut u32) -> i32; | ||
| type GetDeviceInfo = extern "C" fn(*mut c_void, u32, *mut u32, *mut *const char) -> i32; | ||
| type GetDeviceFromRole = extern "C" fn(*mut c_void, *const std::os::raw::c_char, *mut i32) -> i32; | ||
| type GetDeviceBatteryStatus = | ||
| extern "C" fn(*mut c_void, u32, *mut bool, *mut bool, *mut f32) -> i32; | ||
|
|
||
| type PlaySpaceMove = extern "C" fn(*mut c_void, f32, f32, f32) -> i32; | ||
| type ApplyStageOffset = extern "C" fn(*mut c_void, *const MndPose) -> i32; | ||
|
|
||
| // New implementation | ||
| type GetReferenceSpaceOffset = extern "C" fn(*mut c_void, i32, *mut MndPose) -> i32; | ||
| type SetReferenceSpaceOffset = extern "C" fn(*mut c_void, i32, *const MndPose) -> i32; | ||
|
|
||
| // TODO: Clean up after merge into upstream Monado | ||
| enum MoverImpl { | ||
| None, | ||
| PlaySpaceMove(PlaySpaceMove), | ||
| ApplyStageOffset(ApplyStageOffset), | ||
| SpaceOffsetApi { | ||
| get_reference: GetReferenceSpaceOffset, | ||
| set_reference: SetReferenceSpaceOffset, | ||
| }, | ||
| } | ||
|
|
||
| pub struct LibMonado { | ||
| libmonado: Library, | ||
| mnd_root: *mut c_void, | ||
| mover: MoverImpl, | ||
| } | ||
|
|
||
| impl Drop for LibMonado { | ||
| fn drop(&mut self) { | ||
| unsafe { | ||
| type RootDestroy = extern "C" fn(*mut *mut c_void) -> i32; | ||
| let Ok(root_destroy) = self.libmonado.get::<RootDestroy>(b"mnd_root_destroy\0") else { | ||
| return; | ||
| }; | ||
| root_destroy(&mut self.mnd_root); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl LibMonado { | ||
| pub fn new() -> anyhow::Result<Self> { | ||
| let lib_path = if let Ok(path) = env::var("LIBMONADO_PATH") { | ||
| path | ||
| } else if let Some(path) = xr_runtime_manifest() | ||
| .map(|manifest| manifest.runtime.mnd_libmonado_path) | ||
| .ok() | ||
| .flatten() | ||
| { | ||
| path | ||
| } else { | ||
| bail!("Monado: libmonado not found. Update your Monado/WiVRn or set LIBMONADO_PATH to point at your libmonado.so"); | ||
| }; | ||
|
|
||
| let (libmonado, mnd_root) = unsafe { | ||
| let libmonado = libloading::Library::new(lib_path)?; | ||
| let root_create: Symbol<extern "C" fn(*mut *mut c_void) -> i32> = | ||
| libmonado.get(b"mnd_root_create\0")?; | ||
|
|
||
| let mut root: *mut c_void = std::ptr::null_mut(); | ||
| let ret = root_create(&mut root); | ||
| if ret != 0 { | ||
| anyhow::bail!("Failed to create libmonado root, code: {}", ret); | ||
| } | ||
|
|
||
| (libmonado, root) | ||
| }; | ||
|
|
||
| let space_api = unsafe { | ||
| if let (Ok(get_reference), Ok(set_reference)) = ( | ||
| libmonado.get(b"mnd_root_get_reference_space_offset\0"), | ||
| libmonado.get(b"mnd_root_set_reference_space_offset\0"), | ||
| ) { | ||
| log::info!("Monado: using space offset API"); | ||
|
|
||
| let get_reference: GetReferenceSpaceOffset = *get_reference; | ||
| let set_reference: SetReferenceSpaceOffset = *set_reference; | ||
|
|
||
| MoverImpl::SpaceOffsetApi { | ||
| get_reference, | ||
| set_reference, | ||
| } | ||
| } else if let Ok(playspace_move) = libmonado.get(b"mnd_root_playspace_move\0") { | ||
| log::warn!("Monado: using playspace_move, which is obsolete. Consider updating."); | ||
| MoverImpl::PlaySpaceMove(*playspace_move) | ||
| } else if let Ok(apply_stage_offset) = libmonado.get(b"mnd_root_apply_stage_offset\0") { | ||
| log::warn!( | ||
| "Monado: using apply_stage_offset, which is obsolete. Consider updating." | ||
| ); | ||
| MoverImpl::ApplyStageOffset(*apply_stage_offset) | ||
| } else { | ||
| MoverImpl::None | ||
| } | ||
| }; | ||
|
|
||
| Ok(Self { | ||
| libmonado, | ||
| mnd_root, | ||
| mover: space_api, | ||
| }) | ||
| } | ||
|
|
||
| pub fn mover_supported(&self) -> bool { | ||
| !matches!(self.mover, MoverImpl::None) | ||
| } | ||
| } | ||
|
|
||
| #[derive(Deserialize)] | ||
| struct XrRuntimeManifestRuntime { | ||
| name: String, | ||
| library_path: String, | ||
| mnd_libmonado_path: Option<String>, | ||
| } | ||
|
|
||
| #[derive(Deserialize)] | ||
| struct XrRuntimeManifest { | ||
| file_format_version: String, | ||
| runtime: XrRuntimeManifestRuntime, | ||
| } | ||
|
|
||
| fn xr_runtime_manifest() -> anyhow::Result<XrRuntimeManifest> { | ||
| let xdg_dirs = xdg::BaseDirectories::new()?; // only fails if $HOME unset | ||
| let mut file = xdg_dirs.get_config_home(); | ||
| file.push("openxr/1/active_runtime.json"); | ||
|
|
||
| let json = fs::read_to_string(file)?; | ||
| let manifest = serde_json::from_str(&json)?; | ||
| Ok(manifest) | ||
| } |
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