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use crate::check_errors;
pub use crate::extensions::{
ExtensionRestriction, ExtensionRestrictionError, SupportedExtensionsError,
};
use crate::instance::loader;
use crate::instance::loader::LoadingError;
use std::ffi::CStr;
use std::ptr;
macro_rules! instance_extensions {
(
$($member:ident => {
doc: $doc:expr,
raw: $raw:expr,
requires_core: $requires_core:expr,
requires_instance_extensions: [$($requires_instance_extension:ident),*]$(,)?
},)*
) => (
extensions! {
InstanceExtensions,
$($member => {
doc: $doc,
raw: $raw,
requires_core: $requires_core,
requires_device_extensions: [],
requires_instance_extensions: [$($requires_instance_extension),*],
},)*
}
impl InstanceExtensions {
pub(super) fn check_requirements(
&self,
supported: &InstanceExtensions,
api_version: crate::Version,
) -> Result<(), crate::extensions::ExtensionRestrictionError> {
$(
if self.$member {
if !supported.$member {
return Err(crate::extensions::ExtensionRestrictionError {
extension: stringify!($member),
restriction: crate::extensions::ExtensionRestriction::NotSupported,
});
}
if api_version < $requires_core {
return Err(crate::extensions::ExtensionRestrictionError {
extension: stringify!($member),
restriction: crate::extensions::ExtensionRestriction::RequiresCore($requires_core),
});
} else {
$(
if !self.$requires_instance_extension {
return Err(crate::extensions::ExtensionRestrictionError {
extension: stringify!($member),
restriction: crate::extensions::ExtensionRestriction::RequiresInstanceExtension(stringify!($requires_instance_extension)),
});
}
)*
}
}
)*
Ok(())
}
}
);
}
pub use crate::autogen::InstanceExtensions;
pub(crate) use instance_extensions;
impl InstanceExtensions {
pub fn supported_by_core_raw() -> Result<Self, SupportedExtensionsError> {
InstanceExtensions::supported_by_core_raw_with_loader(loader::auto_loader()?)
}
pub fn supported_by_core() -> Result<Self, LoadingError> {
match InstanceExtensions::supported_by_core_raw() {
Ok(l) => Ok(l),
Err(SupportedExtensionsError::LoadingError(e)) => Err(e),
Err(SupportedExtensionsError::OomError(e)) => panic!("{:?}", e),
}
}
pub fn supported_by_core_with_loader<L>(
ptrs: &loader::FunctionPointers<L>,
) -> Result<Self, LoadingError>
where
L: loader::Loader,
{
match InstanceExtensions::supported_by_core_raw_with_loader(ptrs) {
Ok(l) => Ok(l),
Err(SupportedExtensionsError::LoadingError(e)) => Err(e),
Err(SupportedExtensionsError::OomError(e)) => panic!("{:?}", e),
}
}
pub fn supported_by_core_raw_with_loader<L>(
ptrs: &loader::FunctionPointers<L>,
) -> Result<Self, SupportedExtensionsError>
where
L: loader::Loader,
{
let fns = ptrs.fns();
let properties: Vec<ash::vk::ExtensionProperties> = unsafe {
let mut num = 0;
check_errors(fns.v1_0.enumerate_instance_extension_properties(
ptr::null(),
&mut num,
ptr::null_mut(),
))?;
let mut properties = Vec::with_capacity(num as usize);
check_errors(fns.v1_0.enumerate_instance_extension_properties(
ptr::null(),
&mut num,
properties.as_mut_ptr(),
))?;
properties.set_len(num as usize);
properties
};
Ok(Self::from(properties.iter().map(|property| unsafe {
CStr::from_ptr(property.extension_name.as_ptr())
})))
}
}
#[cfg(test)]
mod tests {
use crate::instance::InstanceExtensions;
use std::ffi::CString;
#[test]
fn empty_extensions() {
let i: Vec<CString> = (&InstanceExtensions::none()).into();
assert!(i.iter().next().is_none());
}
}