danvics/oxipng
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This commit is contained in:
Joshua Holmer 2016-05-02 15:48:21 -04:00
parent 32c35596ea
commit 3652a69255
2 changed files with 6 additions and 9 deletions
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3
Cargo.toml
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@ -21,9 +21,6 @@ name = "oxipng"
path = "src/main.rs" path = "src/main.rs"
doc = false doc = false
[profile.release]
debug = true
[dependencies] [dependencies]
bit-vec = "^0.4.2" bit-vec = "^0.4.2"
byteorder = "^0.5.0" byteorder = "^0.5.0"

12
src/png.rs
View file

@ -1073,12 +1073,12 @@ fn filter_line(filter: u8, bpp: usize, data: &[u8], last_line: &[u8]) -> Vec<u8>
filtered.extend_from_slice(data); filtered.extend_from_slice(data);
} }
1 => { 1 => {
for (i, byte) in data.iter().enumerate() { filtered.extend_from_slice(&data[0..bpp]);
filtered.push(match i.checked_sub(bpp) { filtered.extend_from_slice(&data.iter()
Some(x) => byte.wrapping_sub(data[x]), .skip(bpp)
None => *byte, .zip(data.iter())
}); .map(|(cur, last)| cur.wrapping_sub(*last))
} .collect::<Vec<u8>>());
} }
2 => { 2 => {
if last_line.is_empty() { if last_line.is_empty() {