icc_probe/
icc_probe.rs

1use stet_graphics::icc::{BpcMode, IccCache, IccCacheOptions};
2
3fn dump_profile_shape(bytes: &[u8]) {
4    use moxcms::{ColorProfile, LutWarehouse};
5    let profile = match ColorProfile::new_from_slice(bytes) {
6        Ok(p) => p,
7        Err(e) => {
8            eprintln!("parse error: {e:?}");
9            return;
10        }
11    };
12    eprintln!(
13        "profile: cs={:?} pcs={:?} version={:?}",
14        profile.color_space,
15        profile.pcs,
16        profile.version()
17    );
18    let names = [
19        (
20            "a_to_b_perceptual (A2B0)",
21            profile.lut_a_to_b_perceptual.as_ref(),
22        ),
23        (
24            "a_to_b_colorimetric (A2B1)",
25            profile.lut_a_to_b_colorimetric.as_ref(),
26        ),
27        (
28            "a_to_b_saturation (A2B2)",
29            profile.lut_a_to_b_saturation.as_ref(),
30        ),
31        (
32            "b_to_a_perceptual (B2A0)",
33            profile.lut_b_to_a_perceptual.as_ref(),
34        ),
35    ];
36    for (name, slot) in names {
37        match slot {
38            None => eprintln!("  {name}: missing"),
39            Some(LutWarehouse::Lut(lut)) => {
40                eprintln!(
41                    "  {name}: Lut(in={} out={} grid={} type={:?})",
42                    lut.num_input_channels,
43                    lut.num_output_channels,
44                    lut.num_clut_grid_points,
45                    lut.lut_type
46                );
47            }
48            Some(LutWarehouse::Multidimensional(m)) => {
49                eprintln!(
50                    "  {name}: mAB(in={} out={} grids={:?})",
51                    m.num_input_channels, m.num_output_channels, m.grid_points
52                );
53            }
54        }
55    }
56}
57
58fn main() {
59    let path = std::env::args()
60        .nth(1)
61        .expect("usage: icc_probe <profile.icc>");
62    let bytes = std::fs::read(&path).expect("read profile");
63    dump_profile_shape(&bytes);
64    let cases: &[(f64, f64, f64, f64)] = &[
65        (0.15, 1.0, 1.0, 0.0),
66        (0.0, 0.6, 1.0, 0.0),
67        (0.0, 0.5, 0.9, 0.0),
68        (0.0, 0.7, 1.0, 0.0),
69        (0.15, 0.7, 1.0, 0.0),
70        (0.0, 1.0, 1.0, 0.0),
71        (0.0, 0.0, 0.0, 1.0),
72        (0.0, 0.0, 0.0, 0.0),
73        // Medium-light green range — covers the 0001056.pdf glove regression.
74        (0.15, 0.05, 0.30, 0.0),
75        (0.25, 0.10, 0.40, 0.0),
76        (0.40, 0.15, 0.50, 0.0),
77        (0.40, 0.0, 1.0, 0.0),
78        (0.60, 0.0, 0.80, 0.0),
79        (0.20, 0.20, 0.20, 0.0),
80        // Process primaries — likely out of sRGB gamut.
81        (1.0, 0.0, 0.0, 0.0),
82        (0.0, 1.0, 0.0, 0.0),
83        (0.0, 0.0, 1.0, 0.0),
84        (1.0, 1.0, 0.0, 0.0),
85    ];
86    for mode in [BpcMode::Off, BpcMode::On] {
87        println!("\n== BPC {:?} ==", mode);
88        let opts = IccCacheOptions {
89            bpc_mode: mode,
90            source_cmyk_profile: Some(bytes.clone()),
91        };
92        let cache = IccCache::new_with_options(opts);
93        for &(c, m, y, k) in cases {
94            let rgb = cache.convert_cmyk_readonly(c, m, y, k).expect("convert");
95            println!(
96                "  CMYK({:.2},{:.2},{:.2},{:.2}) -> ({}, {}, {})",
97                c,
98                m,
99                y,
100                k,
101                (rgb.0 * 255.0).round() as u8,
102                (rgb.1 * 255.0).round() as u8,
103                (rgb.2 * 255.0).round() as u8,
104            );
105        }
106    }
107}
icc_probe/icc_probe.rs

icc_probe/
icc_probe.rs
