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use crate::instance::loader::LoadingError;
use crate::Error;
use crate::OomError;
use crate::Version;
use std::error;
use std::fmt::{Display, Error as FmtError, Formatter};
#[derive(Clone, Debug)]
pub enum SupportedExtensionsError {
LoadingError(LoadingError),
OomError(OomError),
}
impl error::Error for SupportedExtensionsError {
#[inline]
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
match *self {
SupportedExtensionsError::LoadingError(ref err) => Some(err),
SupportedExtensionsError::OomError(ref err) => Some(err),
}
}
}
impl Display for SupportedExtensionsError {
#[inline]
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
write!(
fmt,
"{}",
match *self {
SupportedExtensionsError::LoadingError(_) =>
"failed to load the Vulkan shared library",
SupportedExtensionsError::OomError(_) => "not enough memory available",
}
)
}
}
impl From<OomError> for SupportedExtensionsError {
#[inline]
fn from(err: OomError) -> SupportedExtensionsError {
SupportedExtensionsError::OomError(err)
}
}
impl From<LoadingError> for SupportedExtensionsError {
#[inline]
fn from(err: LoadingError) -> SupportedExtensionsError {
SupportedExtensionsError::LoadingError(err)
}
}
impl From<Error> for SupportedExtensionsError {
#[inline]
fn from(err: Error) -> SupportedExtensionsError {
match err {
err @ Error::OutOfHostMemory => SupportedExtensionsError::OomError(OomError::from(err)),
err @ Error::OutOfDeviceMemory => {
SupportedExtensionsError::OomError(OomError::from(err))
}
_ => panic!("unexpected error: {:?}", err),
}
}
}
#[derive(Clone, Copy, Debug)]
pub struct ExtensionRestrictionError {
pub extension: &'static str,
pub restriction: ExtensionRestriction,
}
impl error::Error for ExtensionRestrictionError {}
impl Display for ExtensionRestrictionError {
#[inline]
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
write!(
fmt,
"a restriction for the extension {} was not met: {}",
self.extension, self.restriction,
)
}
}
#[derive(Clone, Copy, Debug)]
pub enum ExtensionRestriction {
NotSupported,
RequiredIfSupported,
Requires(OneOfRequirements),
ConflictsDeviceExtension(&'static str),
}
impl Display for ExtensionRestriction {
#[inline]
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
match *self {
ExtensionRestriction::NotSupported => {
write!(fmt, "not supported by the loader or physical device")
}
ExtensionRestriction::RequiredIfSupported => {
write!(fmt, "required to be enabled by the physical device")
}
ExtensionRestriction::Requires(requires) => {
if requires.has_multiple() {
write!(fmt, "requires one of: {}", requires)
} else {
write!(fmt, "requires: {}", requires)
}
}
ExtensionRestriction::ConflictsDeviceExtension(ext) => {
write!(fmt, "requires device extension {} to be disabled", ext)
}
}
}
}
#[derive(Clone, Copy, Debug, Default)]
pub struct OneOfRequirements {
pub api_version: Option<Version>,
pub device_extensions: &'static [&'static str],
pub instance_extensions: &'static [&'static str],
}
impl OneOfRequirements {
#[inline]
pub fn has_multiple(&self) -> bool {
self.api_version.iter().count()
+ self.device_extensions.len()
+ self.instance_extensions.len()
> 1
}
}
impl Display for OneOfRequirements {
#[inline]
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
let mut items_written = 0;
if let Some(version) = self.api_version {
write!(
fmt,
"Vulkan API version {}.{}",
version.major, version.minor
)?;
items_written += 1;
}
for ext in self.instance_extensions.iter() {
if items_written != 0 {
write!(fmt, ", ")?;
}
write!(fmt, "instance extension {}", ext)?;
items_written += 1;
}
for ext in self.device_extensions.iter() {
if items_written != 0 {
write!(fmt, ", ")?;
}
write!(fmt, "device extension {}", ext)?;
items_written += 1;
}
Ok(())
}
}