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Fix banding from linear RGB color space conversion

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Surma
2020-12-13 16:27:59 +00:00
parent c3d05e0e2d
commit 405dd1cdfa
7 changed files with 176 additions and 188 deletions
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6
codecs/resize/build.rs
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@@ -4,20 +4,14 @@ use std::io::Write;
fn main() -> std::io::Result<()> {
let mut srgb_to_linear_lut = String::from("static SRGB_TO_LINEAR_LUT: [f32; 256] = [");
let mut linear_to_srgb_lut = String::from("static LINEAR_TO_SRGB_LUT: [f32; 256] = [");
for i in 0..256 {
srgb_to_linear_lut.push_str(&format!("{0:.7}", srgb_to_linear((i as f32) / 255.0)));
srgb_to_linear_lut.push_str(",");
linear_to_srgb_lut.push_str(&format!("{0:.7}", linear_to_srgb((i as f32) / 255.0)));
linear_to_srgb_lut.push_str(",");
}
srgb_to_linear_lut.pop().unwrap();
linear_to_srgb_lut.pop().unwrap();
srgb_to_linear_lut.push_str("];");
linear_to_srgb_lut.push_str("];");
let mut file = std::fs::File::create("src/lut.inc")?;
file.write_all(srgb_to_linear_lut.as_bytes())?;
file.write_all(linear_to_srgb_lut.as_bytes())?;
Ok(())
}