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use crate::atomicmin::AtomicMin;
use crate::error::PngError;
use crate::Deadline;
use crate::PngResult;
use indexmap::IndexSet;
#[doc(hidden)]
pub mod miniz_stream;
#[cfg(feature = "libdeflater")]
mod deflater;
#[cfg(feature = "libdeflater")]
pub use deflater::deflate as libdeflater_deflate;
#[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
pub mod cfzlib;
#[cfg(not(any(target_arch = "x86_64", target_arch = "aarch64")))]
pub mod cfzlib {
pub fn is_supported() -> bool {
return false;
}
}
pub fn inflate(data: &[u8]) -> PngResult<Vec<u8>> {
miniz_oxide::inflate::decompress_to_vec_zlib(data)
.map_err(|e| PngError::new(&format!("Error on decompress: {:?}", e)))
}
#[doc(hidden)]
pub fn deflate(
data: &[u8],
zc: u8,
zs: u8,
zw: u8,
max_size: &AtomicMin,
deadline: &Deadline,
) -> PngResult<Vec<u8>> {
#[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
{
if cfzlib::is_supported() {
return cfzlib::cfzlib_deflate(data, zc, zs, zw, max_size, deadline);
}
}
miniz_stream::compress_to_vec_oxipng(data, zc, zw.into(), zs.into(), max_size, deadline)
}
#[cfg(feature = "zopfli")]
pub fn zopfli_deflate(data: &[u8]) -> PngResult<Vec<u8>> {
use std::cmp::max;
let mut output = Vec::with_capacity(max(1024, data.len() / 20));
let options = zopfli::Options::default();
match zopfli::compress(&options, &zopfli::Format::Zlib, data, &mut output) {
Ok(_) => (),
Err(_) => return Err(PngError::new("Failed to compress in zopfli")),
};
output.shrink_to_fit();
Ok(output)
}
#[derive(Clone, Debug, PartialEq)]
pub enum Deflaters {
Zlib {
compression: IndexSet<u8>,
strategies: IndexSet<u8>,
window: u8,
},
#[cfg(feature = "zopfli")]
Zopfli,
#[cfg(feature = "libdeflater")]
Libdeflater,
}