colormap 0.0.0

color-gradient
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
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324

use crate::interpolation::Interpolator;
use color_core::{HSVA32, RGBA32, RGBA8};
use ordered_float::OrderedFloat;
use std::{collections::BTreeMap, ops::Range};

#[derive(Clone, Debug)]
pub struct HsvGradient {
    hue: Interpolator,
    saturation: Interpolator,
    brightness: Interpolator,
    alpha: Interpolator,
    range: Range<f32>,
}

impl HsvGradient {
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn new(min: f32, max: f32) -> Self {
        debug_assert!(max > min, "max must be greater than min");
        Self {
            hue: Interpolator::new(0.0, 360.0),
            saturation: Interpolator::new(100.0, 100.0),
            brightness: Interpolator::new(100.0, 100.0),
            alpha: Interpolator::new(100.0, 100.0),
            range: Range { start: min, end: max },
        }
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn rescale(&mut self, min: f32, max: f32) {
        debug_assert!(max > min, "max must be greater than min");
        self.range = Range { start: min, end: max };
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn insert_color<HSV>(&mut self, key: f32, color: HSV)
    where
        HSV: Into<HSVA32>,
    {
        let hsva = color.into();
        let ratio = self.get_ratio(key);
        self.hue.insert(ratio, hsva.h);
        self.saturation.insert(ratio, hsva.s);
        self.brightness.insert(ratio, hsva.v);
        self.alpha.insert(ratio, hsva.a);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn remove_color(&mut self, key: f32) {
        let ratio = self.get_ratio(key);
        self.hue.remove(ratio);
        self.saturation.remove(ratio);
        self.brightness.remove(ratio);
        self.alpha.remove(ratio);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn insert_hue(&mut self, key: f32, value: f32) {
        let ratio = self.get_ratio(key);
        self.hue.insert(ratio, value);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn remove_hue(&mut self, key: f32) {
        let ratio = self.get_ratio(key);
        self.hue.remove(ratio);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn insert_saturation(&mut self, key: f32, value: f32) {
        let ratio = self.get_ratio(key);
        self.saturation.insert(ratio, value);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn remove_saturation(&mut self, key: f32) {
        let ratio = self.get_ratio(key);
        self.saturation.remove(ratio);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn insert_brightness(&mut self, key: f32, value: f32) {
        let ratio = self.get_ratio(key);
        self.brightness.insert(ratio, value);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn remove_brightness(&mut self, key: f32) {
        let ratio = self.get_ratio(key);
        self.brightness.remove(ratio);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn insert_alpha(&mut self, key: f32, value: f32) {
        let ratio = self.get_ratio(key);
        self.alpha.insert(ratio, value);
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn remove_alpha(&mut self, key: f32) {
        let ratio = self.get_ratio(key);
        self.alpha.remove(ratio);
    }
}

impl HsvGradient {
    fn get_ratio(&self, value: f32) -> u16 {
        if value <= self.range.start {
            0
        }
        else if value >= self.range.end {
            65535
        }
        else {
            let ratio = (value - self.range.start) / (self.range.end - self.range.start);
            (ratio * 65535.0) as u16
        }
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn get_step(&self, value: f32) -> HSVA32 {
        let ratio = self.get_ratio(value);
        HSVA32 {
            h: self.hue.get_step(ratio),
            s: self.saturation.get_step(ratio),
            v: self.brightness.get_step(ratio),
            a: self.alpha.get_step(ratio),
        }
    }
    /// Creates a new HSVGradient with the given min and max values.
    ///
    /// # Arguments
    ///
    /// * `min`:
    /// * `max`:
    ///
    /// returns: HSVGradient
    ///
    /// # Examples
    ///
    /// ```
    /// # use color_gradient;
    /// ```
    pub fn get_linear(&self, value: f32) -> HSVA32 {
        let ratio = self.get_ratio(value);
        HSVA32 {
            h: self.hue.get_linear(ratio),
            s: self.saturation.get_linear(ratio),
            v: self.brightness.get_linear(ratio),
            a: self.alpha.get_linear(ratio),
        }
    }
}

impl HsvGradient {
    pub fn standard(min: f32, max: f32) -> HsvGradient {
        let mut grad = HsvGradient::new(0.0, 360.0);
        grad.insert_hue(0.0, 0.0);
        grad.insert_hue(60.0, 60.0);
        grad.insert_hue(120.0, 120.0);
        grad.insert_hue(180.0, 180.0);
        grad.insert_hue(240.0, 240.0);
        grad.insert_hue(300.0, 300.0);
        grad.insert_hue(360.0, 360.0);
        grad.rescale(min, max);
        grad
    }
}