f6d3c144b6
Table 5 in ICC.1:2010 does not seem relevant, table 65 defines parametricCurveType so that seems correct. The formula in the comment was incorrect, it is correct in the code (I checked that the code is correct). Differential Revision: https://phabricator.services.mozilla.com/D240301
qcms
Firefox's library for transforming image data between ICC profiles.
Example
// Decode the jpeg
let mut d = jpeg_decoder::Decoder::new(std::fs::File::open("/Users/jrmuizel/Desktop/DSCF2460.jpg").unwrap());
let mut data = d.decode().unwrap();
let info = d.info().unwrap();
// Extract the profile after decode
let profile = d.icc_profile().unwrap();
// Create a new qcms Profile
let input = qcms::Profile::new_from_slice(&profile).unwrap();
let mut output = qcms::Profile::new_sRGB();
output.precache_output_transform();
// Create a transform between input and output profiles and apply it.
let xfm = qcms::Transform::new(&input, &output, qcms::DataType::RGB8, qcms::Intent::default()).unwrap();
xfm.apply(&mut data);
// write the result to a PNG
let mut encoder = png::Encoder::new(std::fs::File::create("out.png").unwrap(), info.width as u32, info.height as u32);
encoder.set_color(png::ColorType::Rgb);
encoder.set_srgb(png::SrgbRenderingIntent::Perceptual);
let mut writer = encoder.write_header().unwrap();
writer.write_image_data(&data).unwrap(); // Save
This library was originally written in C, was converted to Rust using c2rust, and then refactored to be mostly safe and more idiomatic Rust.