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mod belt;
mod device;
mod encoder;
use std::{
borrow::Cow,
mem::{align_of, size_of},
ptr::copy_nonoverlapping,
};
pub use belt::StagingBelt;
pub use device::{BufferInitDescriptor, DeviceExt};
pub use encoder::RenderEncoder;
pub fn make_spirv<'a>(data: &'a [u8]) -> super::ShaderSource<'a> {
const MAGIC_NUMBER: u32 = 0x0723_0203;
assert_eq!(
data.len() % size_of::<u32>(),
0,
"data size is not a multiple of 4"
);
let words = if data.as_ptr().align_offset(align_of::<u32>()) == 0 {
let (pre, words, post) = unsafe { data.align_to::<u32>() };
debug_assert!(pre.is_empty());
debug_assert!(post.is_empty());
Cow::from(words)
} else {
let mut words = vec![0u32; data.len() / size_of::<u32>()];
unsafe {
copy_nonoverlapping(data.as_ptr(), words.as_mut_ptr() as *mut u8, data.len());
}
Cow::from(words)
};
assert_eq!(
words[0], MAGIC_NUMBER,
"wrong magic word {:x}. Make sure you are using a binary SPIRV file.",
words[0]
);
super::ShaderSource::SpirV(words)
}