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use crate::buffer::BufferAccess;
use crate::device::Device;
use crate::device::DeviceOwned;
use crate::VulkanObject;
use std::error;
use std::fmt;
pub fn check_indirect_buffer(
device: &Device,
buffer: &dyn BufferAccess,
) -> Result<(), CheckIndirectBufferError> {
assert_eq!(
buffer.inner().buffer.device().internal_object(),
device.internal_object()
);
if !buffer.inner().buffer.usage().indirect_buffer {
return Err(CheckIndirectBufferError::BufferMissingUsage);
}
Ok(())
}
#[derive(Debug, Copy, Clone)]
pub enum CheckIndirectBufferError {
BufferMissingUsage,
MaxDrawIndirectCountLimitExceeded {
limit: u32,
requested: u32,
},
}
impl error::Error for CheckIndirectBufferError {}
impl fmt::Display for CheckIndirectBufferError {
#[inline]
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(
fmt,
"{}",
match *self {
CheckIndirectBufferError::BufferMissingUsage => {
"the indirect buffer usage must be enabled on the indirect buffer"
}
CheckIndirectBufferError::MaxDrawIndirectCountLimitExceeded {
limit,
requested,
} => {
"the maximum number of indirect draws has been exceeded"
}
}
)
}
}