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Diffstat (limited to 'vendor/tiff/src/encoder/compression/deflate.rs')
-rw-r--r-- | vendor/tiff/src/encoder/compression/deflate.rs | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/vendor/tiff/src/encoder/compression/deflate.rs b/vendor/tiff/src/encoder/compression/deflate.rs deleted file mode 100644 index 5e7a261..0000000 --- a/vendor/tiff/src/encoder/compression/deflate.rs +++ /dev/null @@ -1,83 +0,0 @@ -use crate::{encoder::compression::*, tags::CompressionMethod}; -use flate2::{write::ZlibEncoder, Compression as FlateCompression}; -use std::io::Write; - -/// The Deflate algorithm used to compress image data in TIFF files. -#[derive(Debug, Clone, Copy)] -pub struct Deflate { - level: FlateCompression, -} - -/// The level of compression used by the Deflate algorithm. -/// It allows trading compression ratio for compression speed. -#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)] -#[non_exhaustive] -pub enum DeflateLevel { - /// The fastest possible compression mode. - Fast = 1, - /// The conserative choice between speed and ratio. - Balanced = 6, - /// The best compression available with Deflate. - Best = 9, -} - -impl Default for DeflateLevel { - fn default() -> Self { - DeflateLevel::Balanced - } -} - -impl Deflate { - /// Create a new deflate compressor with a specific level of compression. - pub fn with_level(level: DeflateLevel) -> Self { - Self { - level: FlateCompression::new(level as u32), - } - } -} - -impl Default for Deflate { - fn default() -> Self { - Self::with_level(DeflateLevel::default()) - } -} - -impl Compression for Deflate { - const COMPRESSION_METHOD: CompressionMethod = CompressionMethod::Deflate; - - fn get_algorithm(&self) -> Compressor { - Compressor::Deflate(self.clone()) - } -} - -impl CompressionAlgorithm for Deflate { - fn write_to<W: Write>(&mut self, writer: &mut W, bytes: &[u8]) -> Result<u64, io::Error> { - let mut encoder = ZlibEncoder::new(writer, self.level); - encoder.write_all(bytes)?; - encoder.try_finish()?; - Ok(encoder.total_out()) - } -} - -#[cfg(test)] -mod tests { - use super::*; - use crate::encoder::compression::tests::TEST_DATA; - use std::io::Cursor; - - #[test] - fn test_deflate() { - const EXPECTED_COMPRESSED_DATA: [u8; 64] = [ - 0x78, 0x9C, 0x15, 0xC7, 0xD1, 0x0D, 0x80, 0x20, 0x0C, 0x04, 0xD0, 0x55, 0x6E, 0x02, - 0xA7, 0x71, 0x81, 0xA6, 0x41, 0xDA, 0x28, 0xD4, 0xF4, 0xD0, 0xF9, 0x81, 0xE4, 0xFD, - 0xBC, 0xD3, 0x9C, 0x58, 0x04, 0x1C, 0xE9, 0xBD, 0xE2, 0x8A, 0x84, 0x5A, 0xD1, 0x7B, - 0xE7, 0x97, 0xF4, 0xF8, 0x08, 0x8D, 0xF6, 0x66, 0x21, 0x3D, 0x3A, 0xE4, 0xA9, 0x91, - 0x3E, 0xAC, 0xF1, 0x98, 0xB9, 0x70, 0x17, 0x13, - ]; - - let mut compressed_data = Vec::<u8>::new(); - let mut writer = Cursor::new(&mut compressed_data); - Deflate::default().write_to(&mut writer, TEST_DATA).unwrap(); - assert_eq!(EXPECTED_COMPRESSED_DATA, compressed_data.as_slice()); - } -} |