ocio 0.2.2

A pure Rust port of OpenColorIO, the color management framework for visual effects and animation.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302

//! Port of `Config_tests.cpp` (part 3: serialization of the transforms).

mod config_common;

use config_common::profiles::*;
use config_common::*;
use ocio::*;

#[test]
fn config_serialize_colorspace_displayview_transforms() {
    let end = r#"    from_scene_reference: !<GroupTransform>
      children:
        - !<ColorSpaceTransform> {src: raw, dst: log}
        - !<ColorSpaceTransform> {src: raw, dst: log, direction: inverse}
        - !<ColorSpaceTransform> {src: default, dst: log, data_bypass: false}
        - !<DisplayViewTransform> {src: raw, display: sRGB, view: RawView}
        - !<DisplayViewTransform> {src: default, display: sRGB, view: RawView, direction: inverse}
        - !<DisplayViewTransform> {src: log, display: sRGB, view: RawView, looks_bypass: true, data_bypass: false}
"#;
    check_roundtrip(&format!("{}{end}", profile_v2_start()));
}

fn v2(end: &str) -> String {
    format!("{}{end}", profile_v2_start())
}

fn v1(end: &str) -> String {
    format!("{}{end}", simple_profile_v1())
}

/// The part of a v2 profile before the file rules (i.e. without them).
fn v2_no_rules(end: &str) -> String {
    format!(
        "{PROFILE_V2}{SIMPLE_PROFILE_A}{}{end}",
        simple_profile_b_v2()
    )
}

#[test]
fn config_range_serialization() {
    for end in [
        "    from_scene_reference: !<RangeTransform> {min_in_value: 0, min_out_value: 0}\n",
        "    from_scene_reference: !<RangeTransform> {min_in_value: 0, min_out_value: 0, direction: inverse}\n",
        "    from_scene_reference: !<RangeTransform> {min_in_value: 0, max_in_value: 1, min_out_value: 0, max_out_value: 1, style: noClamp, direction: inverse}\n",
        "    from_scene_reference: !<RangeTransform> {min_in_value: -0.0109, max_in_value: 1.0505, min_out_value: 0.0009, max_out_value: 2.5001, direction: inverse}\n",
        "    from_scene_reference: !<RangeTransform> {min_in_value: -0.01, max_in_value: 1.05, min_out_value: 0.0009, max_out_value: 2.5}\n",
    ] {
        check_roundtrip(&v2(end));
    }

    // Clamp style is not saved.
    check_roundtrip_to(
        &v2("    from_scene_reference: !<RangeTransform> {min_in_value: -0.0109, max_in_value: 1.0505, min_out_value: 0.0009, max_out_value: 2.5001, style: Clamp, direction: inverse}\n"),
        &v2("    from_scene_reference: !<RangeTransform> {min_in_value: -0.0109, max_in_value: 1.0505, min_out_value: 0.0009, max_out_value: 2.5001, direction: inverse}\n"),
    );

    // Invalid ranges can still be read and written.
    for end in [
        "    from_scene_reference: !<RangeTransform> {min_in_value: 0, max_out_value: 1}\n",
        "    from_scene_reference: !<RangeTransform> {min_in_value: 0.12345678901234, max_out_value: 1.23456789012345}\n",
        "    from_scene_reference: !<RangeTransform> {min_out_value: 0.0009, max_out_value: 2.5}\n",
        "    from_scene_reference: !<GroupTransform>\n      children:\n        - !<RangeTransform> {min_in_value: -0.01, max_in_value: 1.05, min_out_value: 0.0009, max_out_value: 2.5}\n        - !<RangeTransform> {min_out_value: 0.0009, max_out_value: 2.1}\n        - !<RangeTransform> {min_out_value: 0.1, max_out_value: 0.9}\n",
    ] {
        check_roundtrip_no_validation(&v2(end));
    }

    // max_in_value has an illegal second number.
    assert_err!(
        Config::create_from_str(&v2_no_rules(
            "    from_scene_reference: !<RangeTransform> {min_in_value: -0.01, max_in_value: 1.05  10, min_out_value: 0.0009, max_out_value: 2.5}\n"
        )),
        "parsing double failed"
    );

    // max_in_value & max_out_value have no value, they will not be defined.
    check_roundtrip_to(
        &v2_no_rules("    from_scene_reference: !<RangeTransform> {min_in_value: -0.01, max_in_value: , min_out_value: -0.01, max_out_value: }\n"),
        &v2("    from_scene_reference: !<RangeTransform> {min_in_value: -0.01, min_out_value: -0.01}\n"),
    );

    // Some faulty cases.
    for end in [
        "    from_scene_reference: !<GroupTransform>\n      children:\n        - !<RangeTransform> mInValue: -0.01, max_in_value: 1.05, min_out_value: 0.0009, max_out_value: 2.5}\n",
        "    from_scene_reference: !<RangeTransform> {min_in_value: -0.01 max_in_value: 1.05, min_out_value: 0.0009, max_out_value: 2.5}\n",
        "    from_scene_reference: !<RangeTransform> {min_in_value: -0.01, max_in_value: 1.05, min_out_value: 0.0009maxOutValue: 2.5}\n",
    ] {
        assert_err!(Config::create_from_str(&v2(end)), "Loading the OCIO profile failed");
    }
}

#[test]
fn config_range_serialization_validation() {
    let config = Config::create_from_str(&v2(
        "    from_scene_reference: !<RangeTransform> {min_in_value: 0, min_out_value: 0, style: noClamp}\n",
    ))
    .unwrap();
    assert_err!(
        config.validate(),
        "non clamping range must have min and max values defined"
    );

    for end in [
        "    from_scene_reference: !<RangeTransform> {min_in_value: 0, max_out_value: 1}\n",
        "    from_scene_reference: !<RangeTransform> {min_in_value: 0.12345678901234, max_out_value: 1.23456789012345}\n",
        "    from_scene_reference: !<RangeTransform> {min_out_value: 0.0009, max_out_value: 2.5}\n",
        "    from_scene_reference: !<GroupTransform>\n      children:\n        - !<RangeTransform> {min_in_value: -0.01, max_in_value: 1.05, min_out_value: 0.0009, max_out_value: 2.5}\n        - !<RangeTransform> {min_out_value: 0.0009, max_out_value: 2.1}\n        - !<RangeTransform> {min_out_value: 0.1, max_out_value: 0.9}\n",
    ] {
        let config = Config::create_from_str(&v2(end)).unwrap();
        assert_err!(config.validate(), "must be both set or both missing");
    }
}

#[test]
fn config_exponent_serialization() {
    check_roundtrip(&v1(
        "    from_reference: !<ExponentTransform> {value: [1.101, 1.202, 1.303, 1.404]}\n",
    ));
    // If R==G==B and A==1, and the version is > 1, the compact syntax is used.
    check_roundtrip(&v2(
        "    from_scene_reference: !<ExponentTransform> {value: 1.101}\n",
    ));
    // If version==1, then write all values for compatibility with the v1 library.
    check_roundtrip(&v1(
        "    from_reference: !<ExponentTransform> {value: [1.101, 1.101, 1.101, 1]}\n",
    ));
    check_roundtrip(&v1(
        "    from_reference: !<ExponentTransform> {value: [1.101, 1.202, 1.303, 1.404], direction: inverse}\n",
    ));
    check_roundtrip(&v2(
        "    from_scene_reference: !<ExponentTransform> {value: [1.101, 1.202, 1.303, 1.404], style: mirror, direction: inverse}\n",
    ));
    check_roundtrip(&v2(
        "    from_scene_reference: !<ExponentTransform> {value: [1.101, 1.202, 1.303, 1.404], style: pass_thru, direction: inverse}\n",
    ));

    // Errors.
    assert_err!(
        Config::create_from_str(&v1(
            "    from_reference: !<ExponentTransform> {value: [1.1, 1.2, 1.3]}\n"
        )),
        "'value' values must be 4 floats. Found '3'"
    );
    assert_err!(
        Config::create_from_str(&v1(
            "    from_reference: !<ExponentTransform> {value: [1.101, 1.202, 1.303, 1.404], style: wrong,}\n"
        )),
        "Unknown exponent style"
    );
}

#[test]
fn config_exponent_with_linear_serialization() {
    for end in [
        "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: [1.1, 1.2, 1.3, 1.4], offset: [0.101, 0.102, 0.103, 0.1]}\n",
        "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: [1.1, 1.2, 1.3, 1.4], offset: [0.101, 0.102, 0.103, 0.1], style: mirror}\n",
        "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: [1.1, 1.2, 1.3, 1.4], offset: [0.101, 0.102, 0.103, 0.1], direction: inverse}\n",
        "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: [1.1, 1.2, 1.3, 1.4], offset: [0.101, 0.102, 0.103, 0.1], style: mirror, direction: inverse}\n",
        "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: 1.1, offset: 0.101, direction: inverse}\n",
    ] {
        check_roundtrip(&v2(end));
    }

    let cases = [
        (
            "    from_scene_reference: !<ExponentWithLinearTransform> {}\n",
            "ExponentWithLinear parse error, gamma and offset fields are missing",
        ),
        (
            "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: [1.1, 1.2, 1.3, 1.4]}\n",
            "ExponentWithLinear parse error, offset field is missing",
        ),
        (
            "    from_scene_reference: !<ExponentWithLinearTransform> {offset: [1.1, 1.2, 1.3, 1.4]}\n",
            "ExponentWithLinear parse error, gamma field is missing",
        ),
        (
            "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: [1.1, 1.2, 1.3]}\n",
            "ExponentWithLinear parse error, gamma field must be 4 floats",
        ),
        (
            "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: [1.1, 1.2, 1.3, 1.4], offset: [0.101, 0.102]}\n",
            "ExponentWithLinear parse error, offset field must be 4 floats",
        ),
        (
            "    from_scene_reference: !<ExponentWithLinearTransform> {gamma: [1.1, 1.2, 1.3, 1.4], offset: [0.101, 0.102, 0.103, 0.1], direction: inverse, style: pass_thru}\n",
            "Pass thru negative extrapolation is not valid for MonCurve",
        ),
    ];
    for (end, what) in cases {
        assert_err!(Config::create_from_str(&v2(end)), what);
    }
}

#[test]
fn config_exponent_vs_config_version() {
    let apply = |s: &str| {
        let config = Config::create_from_str(s).unwrap();
        config.validate().unwrap();
        let cpu = config
            .get_processor("raw", "lnh")
            .unwrap()
            .default_cpu_processor();
        let mut img = [-0.5f32, 0.0, 1.0, 1.0];
        cpu.apply_rgba(&mut img);
        img
    };
    let end1 = "    from_reference: !<ExponentTransform> {value: [1, 1, 1, 1]}\n";
    let end2 = "    from_reference: !<ExponentTransform> {value: [2, 2, 2, 1]}\n";

    assert_eq!(apply(&v1(end1)), [-0.5, 0.0, 1.0, 1.0]);
    assert_eq!(apply(&v1(end2)), [0.0, 0.0, 1.0, 1.0]);

    let img = apply(&v2(end1));
    assert_eq!(img[0], 0.0);
    assert_eq!(img[1], 0.0);
    assert!((img[2] - 1.0).abs() < 2e-5);
    assert!((img[3] - 1.0).abs() < 2e-5);

    let img = apply(&v2(end2));
    assert_eq!(img[0], 0.0);
    assert_eq!(img[1], 0.0);
    assert!((img[2] - 1.0).abs() < 3e-5);
    assert!((img[3] - 1.0).abs() < 2e-5);
}

#[test]
fn config_categories() {
    const CONFIG: &str = r#"ocio_profile_version: 2

environment:
  {}
search_path: luts
strictparsing: true
luma: [0.2126, 0.7152, 0.0722]

roles:
  default: raw1
  scene_linear: raw1

file_rules:
  - !<Rule> {name: Default, colorspace: default}

displays:
  sRGB:
    - !<View> {name: Raw, colorspace: raw1}

active_displays: []
active_views: []

colorspaces:
  - !<ColorSpace>
    name: raw1
    family: ""
    equalitygroup: ""
    bitdepth: unknown
    isdata: false
    categories: [rendering, linear]
    encoding: scene-linear
    allocation: uniform
    allocationvars: [-0.125, 1.125]

  - !<ColorSpace>
    name: raw2
    family: ""
    equalitygroup: ""
    bitdepth: unknown
    isdata: false
    categories: [rendering]
    encoding: data
    allocation: uniform
    allocationvars: [-0.125, 1.125]
"#;
    let config = check_roundtrip(CONFIG);

    let css = config.color_spaces("");
    assert_eq!(css.num_color_spaces(), 2);
    let cs = css.color_space_by_index(0).unwrap();
    assert_eq!(cs.num_categories(), 2);
    assert_eq!(cs.category(0), Some("rendering"));
    assert_eq!(cs.category(1), Some("linear"));

    let css = config.color_spaces("linear");
    assert_eq!(css.num_color_spaces(), 1);
    let cs = css.color_space_by_index(0).unwrap();
    assert_eq!(cs.num_categories(), 2);
    assert_eq!(cs.category(0), Some("rendering"));
    assert_eq!(cs.category(1), Some("linear"));

    assert_eq!(config.color_spaces("rendering").num_color_spaces(), 2);

    assert_eq!(config.num_color_spaces(), 2);
    assert_eq!(config.color_space_name_by_index(0), "raw1");
    assert_eq!(config.color_space_name_by_index(1), "raw2");
    assert_eq!(config.index_for_color_space("raw1"), Some(0));
    assert_eq!(config.index_for_color_space("raw2"), Some(1));
    let cs = config.get_color_space("raw1").unwrap();
    assert_eq!(cs.name(), "raw1");
    assert_eq!(cs.encoding(), "scene-linear");
    let cs = config.get_color_space("raw2").unwrap();
    assert_eq!(cs.name(), "raw2");
    assert_eq!(cs.encoding(), "data");
}