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//! RenderDoc integration - <https://renderdoc.org/>
use std::{ffi, os, ptr};
/// The dynamically loaded RenderDoc API function table
#[repr(C)]
#[derive(Debug)]
pub struct RenderDocApi {
api: renderdoc_sys::RENDERDOC_API_1_4_1,
lib: libloading::Library,
}
unsafe impl Send for RenderDocApi {}
unsafe impl Sync for RenderDocApi {}
/// RenderDoc API type
#[derive(Debug)]
pub enum RenderDoc {
/// RenderDoc functionality is available
Available {
/// RenderDoc API with function pointers
api: RenderDocApi,
},
/// RenderDoc functionality is _not_ available
NotAvailable {
/// A description why renderdoc functionality is not available
reason: String,
},
}
// TODO: replace with libloading API once supported
#[cfg(unix)]
const RTLD_NOLOAD: i32 = 0x4;
impl RenderDoc {
pub unsafe fn new() -> Self {
type GetApiFn = unsafe extern "C" fn(version: u32, out: *mut *mut ffi::c_void) -> i32;
#[cfg(windows)]
let renderdoc_filename = "renderdoc.dll";
#[cfg(all(unix, not(target_os = "android")))]
let renderdoc_filename = "librenderdoc.so";
#[cfg(target_os = "android")]
let renderdoc_filename = "libVkLayer_GLES_RenderDoc.so";
#[cfg(unix)]
let renderdoc_result: Result<libloading::Library, libloading::Error> = unsafe {
libloading::os::unix::Library::open(
Some(renderdoc_filename),
libloading::os::unix::RTLD_NOW | RTLD_NOLOAD,
)
}
.map(|lib| lib.into());
#[cfg(windows)]
let renderdoc_result: Result<libloading::Library, libloading::Error> =
libloading::os::windows::Library::open_already_loaded(renderdoc_filename)
.map(|lib| lib.into());
let renderdoc_lib = match renderdoc_result {
Ok(lib) => lib,
Err(e) => {
return RenderDoc::NotAvailable {
reason: format!(
"Unable to load renderdoc library '{}': {:?}",
renderdoc_filename, e
),
}
}
};
let get_api: libloading::Symbol<GetApiFn> =
match unsafe { renderdoc_lib.get(b"RENDERDOC_GetAPI\0") } {
Ok(api) => api,
Err(e) => {
return RenderDoc::NotAvailable {
reason: format!(
"Unable to get RENDERDOC_GetAPI from renderdoc library '{}': {:?}",
renderdoc_filename, e
),
}
}
};
let mut obj = ptr::null_mut();
match unsafe { get_api(10401, &mut obj) } {
1 => RenderDoc::Available {
api: RenderDocApi {
api: unsafe { *(obj as *mut renderdoc_sys::RENDERDOC_API_1_4_1) },
lib: renderdoc_lib,
},
},
return_value => RenderDoc::NotAvailable {
reason: format!(
"Unable to get API from renderdoc library '{}': {}",
renderdoc_filename, return_value
),
},
}
}
}
impl Default for RenderDoc {
fn default() -> Self {
if !cfg!(debug_assertions) {
return RenderDoc::NotAvailable {
reason: "RenderDoc support is only enabled with 'debug_assertions'".into(),
};
}
unsafe { Self::new() }
}
}
/// A implementation specific handle
pub type Handle = *mut os::raw::c_void;
impl RenderDoc {
/// Start a RenderDoc frame capture
pub unsafe fn start_frame_capture(&self, device_handle: Handle, window_handle: Handle) -> bool {
match *self {
Self::Available { api: ref entry } => {
unsafe { entry.api.StartFrameCapture.unwrap()(device_handle, window_handle) };
true
}
Self::NotAvailable { ref reason } => {
log::warn!("Could not start RenderDoc frame capture: {}", reason);
false
}
}
}
/// End a RenderDoc frame capture
pub unsafe fn end_frame_capture(&self, device_handle: Handle, window_handle: Handle) {
match *self {
Self::Available { api: ref entry } => {
unsafe { entry.api.EndFrameCapture.unwrap()(device_handle, window_handle) };
}
Self::NotAvailable { ref reason } => {
log::warn!("Could not end RenderDoc frame capture: {}", reason)
}
};
}
}
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