Flutter Impeller
color.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef FLUTTER_IMPELLER_GEOMETRY_COLOR_H_
6 #define FLUTTER_IMPELLER_GEOMETRY_COLOR_H_
7 
8 #include <stdint.h>
9 #include <algorithm>
10 #include <array>
11 #include <cstdint>
12 #include <cstdlib>
13 #include <ostream>
14 #include <type_traits>
15 
16 #include "impeller/geometry/scalar.h"
17 #include "impeller/geometry/type_traits.h"
18 
19 #define IMPELLER_FOR_EACH_BLEND_MODE(V) \
20  V(Clear) \
21  V(Source) \
22  V(Destination) \
23  V(SourceOver) \
24  V(DestinationOver) \
25  V(SourceIn) \
26  V(DestinationIn) \
27  V(SourceOut) \
28  V(DestinationOut) \
29  V(SourceATop) \
30  V(DestinationATop) \
31  V(Xor) \
32  V(Plus) \
33  V(Modulate) \
34  V(Screen) \
35  V(Overlay) \
36  V(Darken) \
37  V(Lighten) \
38  V(ColorDodge) \
39  V(ColorBurn) \
40  V(HardLight) \
41  V(SoftLight) \
42  V(Difference) \
43  V(Exclusion) \
44  V(Multiply) \
45  V(Hue) \
46  V(Saturation) \
47  V(Color) \
48  V(Luminosity)
49 
50 namespace impeller {
51 
52 struct ColorHSB;
53 struct Vector4;
54 
55 enum class YUVColorSpace { kBT601LimitedRange, kBT601FullRange };
56 
57 /// All blend modes assume that both the source (fragment output) and
58 /// destination (first color attachment) have colors with premultiplied alpha.
59 enum class BlendMode : uint8_t {
60  // The following blend modes are able to be used as pipeline blend modes or
61  // via `BlendFilterContents`.
62  kClear = 0,
63  kSource,
64  kDestination,
65  kSourceOver,
66  kDestinationOver,
67  kSourceIn,
68  kDestinationIn,
69  kSourceOut,
70  kDestinationOut,
71  kSourceATop,
72  kDestinationATop,
73  kXor,
74  kPlus,
75  kModulate,
76 
77  // The following blend modes use equations that are not available for
78  // pipelines on most graphics devices without extensions, and so they are
79  // only able to be used via `BlendFilterContents`.
80  kScreen,
81  kOverlay,
82  kDarken,
83  kLighten,
84  kColorDodge,
85  kColorBurn,
86  kHardLight,
87  kSoftLight,
88  kDifference,
89  kExclusion,
90  kMultiply,
91  kHue,
92  kSaturation,
93  kColor,
94  kLuminosity,
95 
96  kLast = kLuminosity,
97 };
98 
99 const char* BlendModeToString(BlendMode blend_mode);
100 
101 /// 4x5 matrix for transforming the color and alpha components of a Bitmap.
102 ///
103 /// [ a, b, c, d, e,
104 /// f, g, h, i, j,
105 /// k, l, m, n, o,
106 /// p, q, r, s, t ]
107 ///
108 /// When applied to a color [R, G, B, A], the resulting color is computed as:
109 ///
110 /// R’ = a*R + b*G + c*B + d*A + e;
111 /// G’ = f*R + g*G + h*B + i*A + j;
112 /// B’ = k*R + l*G + m*B + n*A + o;
113 /// A’ = p*R + q*G + r*B + s*A + t;
114 ///
115 /// That resulting color [R’, G’, B’, A’] then has each channel clamped to the 0
116 /// to 1 range.
117 struct ColorMatrix {
118  Scalar array[20];
119 };
120 
121 /**
122  * Represents a RGBA color
123  */
124 struct Color {
125  /**
126  * The red color component (0 to 1)
127  */
128  Scalar red = 0.0;
129 
130  /**
131  * The green color component (0 to 1)
132  */
133  Scalar green = 0.0;
134 
135  /**
136  * The blue color component (0 to 1)
137  */
138  Scalar blue = 0.0;
139 
140  /**
141  * The alpha component of the color (0 to 1)
142  */
143  Scalar alpha = 0.0;
144 
145  constexpr Color() {}
146 
147  explicit Color(const ColorHSB& hsbColor);
148 
149  explicit Color(const Vector4& value);
150 
151  constexpr Color(Scalar r, Scalar g, Scalar b, Scalar a)
152  : red(r), green(g), blue(b), alpha(a) {}
153 
154  static constexpr Color MakeRGBA8(uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
155  return Color(
156  static_cast<Scalar>(r) / 255.0f, static_cast<Scalar>(g) / 255.0f,
157  static_cast<Scalar>(b) / 255.0f, static_cast<Scalar>(a) / 255.0f);
158  }
159 
160  /// @brief Convert this color to a 32-bit representation.
161  static constexpr uint32_t ToIColor(Color color) {
162  return (((std::lround(color.alpha * 255.0f) & 0xff) << 24) |
163  ((std::lround(color.red * 255.0f) & 0xff) << 16) |
164  ((std::lround(color.green * 255.0f) & 0xff) << 8) |
165  ((std::lround(color.blue * 255.0f) & 0xff) << 0)) &
166  0xFFFFFFFF;
167  }
168 
169  constexpr inline bool operator==(const Color& c) const {
170  return ScalarNearlyEqual(red, c.red) && ScalarNearlyEqual(green, c.green) &&
171  ScalarNearlyEqual(blue, c.blue) && ScalarNearlyEqual(alpha, c.alpha);
172  }
173 
174  constexpr inline Color operator+(const Color& c) const {
175  return {red + c.red, green + c.green, blue + c.blue, alpha + c.alpha};
176  }
177 
178  template <class T, class = std::enable_if_t<std::is_arithmetic_v<T>>>
179  constexpr inline Color operator+(T value) const {
180  auto v = static_cast<Scalar>(value);
181  return {red + v, green + v, blue + v, alpha + v};
182  }
183 
184  constexpr inline Color operator-(const Color& c) const {
185  return {red - c.red, green - c.green, blue - c.blue, alpha - c.alpha};
186  }
187 
188  template <class T, class = std::enable_if_t<std::is_arithmetic_v<T>>>
189  constexpr inline Color operator-(T value) const {
190  auto v = static_cast<Scalar>(value);
191  return {red - v, green - v, blue - v, alpha - v};
192  }
193 
194  constexpr inline Color operator*(const Color& c) const {
195  return {red * c.red, green * c.green, blue * c.blue, alpha * c.alpha};
196  }
197 
198  template <class T, class = std::enable_if_t<std::is_arithmetic_v<T>>>
199  constexpr inline Color operator*(T value) const {
200  auto v = static_cast<Scalar>(value);
201  return {red * v, green * v, blue * v, alpha * v};
202  }
203 
204  constexpr inline Color operator/(const Color& c) const {
205  return {red * c.red, green * c.green, blue * c.blue, alpha * c.alpha};
206  }
207 
208  template <class T, class = std::enable_if_t<std::is_arithmetic_v<T>>>
209  constexpr inline Color operator/(T value) const {
210  auto v = static_cast<Scalar>(value);
211  return {red / v, green / v, blue / v, alpha / v};
212  }
213 
214  constexpr Color Premultiply() const {
215  return {red * alpha, green * alpha, blue * alpha, alpha};
216  }
217 
218  constexpr Color Unpremultiply() const {
219  if (ScalarNearlyEqual(alpha, 0.0f)) {
220  return Color::BlackTransparent();
221  }
222  return {red / alpha, green / alpha, blue / alpha, alpha};
223  }
224 
225  /**
226  * @brief Return a color that is linearly interpolated between colors a
227  * and b, according to the value of t.
228  *
229  * @param a The lower color.
230  * @param b The upper color.
231  * @param t A value between 0.0f and 1.0f, inclusive.
232  * @return constexpr Color
233  */
234  constexpr static Color Lerp(Color a, Color b, Scalar t) {
235  return a + (b - a) * t;
236  }
237 
238  constexpr Color Clamp01() const {
239  return Color(std::clamp(red, 0.0f, 1.0f), std::clamp(green, 0.0f, 1.0f),
240  std::clamp(blue, 0.0f, 1.0f), std::clamp(alpha, 0.0f, 1.0f));
241  }
242 
243  /**
244  * @brief Convert to R8G8B8A8 representation.
245  *
246  * @return constexpr std::array<u_int8, 4>
247  */
248  constexpr std::array<uint8_t, 4> ToR8G8B8A8() const {
249  uint8_t r = std::round(red * 255.0f);
250  uint8_t g = std::round(green * 255.0f);
251  uint8_t b = std::round(blue * 255.0f);
252  uint8_t a = std::round(alpha * 255.0f);
253  return {r, g, b, a};
254  }
255 
256  /**
257  * @brief Convert to ARGB 32 bit color.
258  *
259  * @return constexpr uint32_t
260  */
261  constexpr uint32_t ToARGB() const {
262  std::array<uint8_t, 4> result = ToR8G8B8A8();
263  return result[3] << 24 | result[0] << 16 | result[1] << 8 | result[2];
264  }
265 
266  static constexpr Color White() { return {1.0f, 1.0f, 1.0f, 1.0f}; }
267 
268  static constexpr Color Black() { return {0.0f, 0.0f, 0.0f, 1.0f}; }
269 
270  static constexpr Color WhiteTransparent() { return {1.0f, 1.0f, 1.0f, 0.0f}; }
271 
272  static constexpr Color BlackTransparent() { return {0.0f, 0.0f, 0.0f, 0.0f}; }
273 
274  static constexpr Color Red() { return {1.0f, 0.0f, 0.0f, 1.0f}; }
275 
276  static constexpr Color Green() { return {0.0f, 1.0f, 0.0f, 1.0f}; }
277 
278  static constexpr Color Blue() { return {0.0f, 0.0f, 1.0f, 1.0f}; }
279 
280  constexpr Color WithAlpha(Scalar new_alpha) const {
281  return {red, green, blue, new_alpha};
282  }
283 
284  static constexpr Color AliceBlue() {
285  return {240.0f / 255.0f, 248.0f / 255.0f, 255.0f / 255.0f, 1.0f};
286  }
287 
288  static constexpr Color AntiqueWhite() {
289  return {250.0f / 255.0f, 235.0f / 255.0f, 215.0f / 255.0f, 1.0f};
290  }
291 
292  static constexpr Color Aqua() {
293  return {0.0f / 255.0f, 255.0f / 255.0f, 255.0f / 255.0f, 1.0f};
294  }
295 
296  static constexpr Color AquaMarine() {
297  return {127.0f / 255.0f, 255.0f / 255.0f, 212.0f / 255.0f, 1.0f};
298  }
299 
300  static constexpr Color Azure() {
301  return {240.0f / 255.0f, 255.0f / 255.0f, 255.0f / 255.0f, 1.0f};
302  }
303 
304  static constexpr Color Beige() {
305  return {245.0f / 255.0f, 245.0f / 255.0f, 220.0f / 255.0f, 1.0f};
306  }
307 
308  static constexpr Color Bisque() {
309  return {255.0f / 255.0f, 228.0f / 255.0f, 196.0f / 255.0f, 1.0f};
310  }
311 
312  static constexpr Color BlanchedAlmond() {
313  return {255.0f / 255.0f, 235.0f / 255.0f, 205.0f / 255.0f, 1.0f};
314  }
315 
316  static constexpr Color BlueViolet() {
317  return {138.0f / 255.0f, 43.0f / 255.0f, 226.0f / 255.0f, 1.0f};
318  }
319 
320  static constexpr Color Brown() {
321  return {165.0f / 255.0f, 42.0f / 255.0f, 42.0f / 255.0f, 1.0f};
322  }
323 
324  static constexpr Color BurlyWood() {
325  return {222.0f / 255.0f, 184.0f / 255.0f, 135.0f / 255.0f, 1.0f};
326  }
327 
328  static constexpr Color CadetBlue() {
329  return {95.0f / 255.0f, 158.0f / 255.0f, 160.0f / 255.0f, 1.0f};
330  }
331 
332  static constexpr Color Chartreuse() {
333  return {127.0f / 255.0f, 255.0f / 255.0f, 0.0f / 255.0f, 1.0f};
334  }
335 
336  static constexpr Color Chocolate() {
337  return {210.0f / 255.0f, 105.0f / 255.0f, 30.0f / 255.0f, 1.0f};
338  }
339 
340  static constexpr Color Coral() {
341  return {255.0f / 255.0f, 127.0f / 255.0f, 80.0f / 255.0f, 1.0f};
342  }
343 
344  static constexpr Color CornflowerBlue() {
345  return {100.0f / 255.0f, 149.0f / 255.0f, 237.0f / 255.0f, 1.0f};
346  }
347 
348  static constexpr Color Cornsilk() {
349  return {255.0f / 255.0f, 248.0f / 255.0f, 220.0f / 255.0f, 1.0f};
350  }
351 
352  static constexpr Color Crimson() {
353  return {220.0f / 255.0f, 20.0f / 255.0f, 60.0f / 255.0f, 1.0f};
354  }
355 
356  static constexpr Color Cyan() {
357  return {0.0f / 255.0f, 255.0f / 255.0f, 255.0f / 255.0f, 1.0f};
358  }
359 
360  static constexpr Color DarkBlue() {
361  return {0.0f / 255.0f, 0.0f / 255.0f, 139.0f / 255.0f, 1.0f};
362  }
363 
364  static constexpr Color DarkCyan() {
365  return {0.0f / 255.0f, 139.0f / 255.0f, 139.0f / 255.0f, 1.0f};
366  }
367 
368  static constexpr Color DarkGoldenrod() {
369  return {184.0f / 255.0f, 134.0f / 255.0f, 11.0f / 255.0f, 1.0f};
370  }
371 
372  static constexpr Color DarkGray() {
373  return {169.0f / 255.0f, 169.0f / 255.0f, 169.0f / 255.0f, 1.0f};
374  }
375 
376  static constexpr Color DarkGreen() {
377  return {0.0f / 255.0f, 100.0f / 255.0f, 0.0f / 255.0f, 1.0f};
378  }
379 
380  static constexpr Color DarkGrey() {
381  return {169.0f / 255.0f, 169.0f / 255.0f, 169.0f / 255.0f, 1.0f};
382  }
383 
384  static constexpr Color DarkKhaki() {
385  return {189.0f / 255.0f, 183.0f / 255.0f, 107.0f / 255.0f, 1.0f};
386  }
387 
388  static constexpr Color DarkMagenta() {
389  return {139.0f / 255.0f, 0.0f / 255.0f, 139.0f / 255.0f, 1.0f};
390  }
391 
392  static constexpr Color DarkOliveGreen() {
393  return {85.0f / 255.0f, 107.0f / 255.0f, 47.0f / 255.0f, 1.0f};
394  }
395 
396  static constexpr Color DarkOrange() {
397  return {255.0f / 255.0f, 140.0f / 255.0f, 0.0f / 255.0f, 1.0f};
398  }
399 
400  static constexpr Color DarkOrchid() {
401  return {153.0f / 255.0f, 50.0f / 255.0f, 204.0f / 255.0f, 1.0f};
402  }
403 
404  static constexpr Color DarkRed() {
405  return {139.0f / 255.0f, 0.0f / 255.0f, 0.0f / 255.0f, 1.0f};
406  }
407 
408  static constexpr Color DarkSalmon() {
409  return {233.0f / 255.0f, 150.0f / 255.0f, 122.0f / 255.0f, 1.0f};
410  }
411 
412  static constexpr Color DarkSeagreen() {
413  return {143.0f / 255.0f, 188.0f / 255.0f, 143.0f / 255.0f, 1.0f};
414  }
415 
416  static constexpr Color DarkSlateBlue() {
417  return {72.0f / 255.0f, 61.0f / 255.0f, 139.0f / 255.0f, 1.0f};
418  }
419 
420  static constexpr Color DarkSlateGray() {
421  return {47.0f / 255.0f, 79.0f / 255.0f, 79.0f / 255.0f, 1.0f};
422  }
423 
424  static constexpr Color DarkSlateGrey() {
425  return {47.0f / 255.0f, 79.0f / 255.0f, 79.0f / 255.0f, 1.0f};
426  }
427 
428  static constexpr Color DarkTurquoise() {
429  return {0.0f / 255.0f, 206.0f / 255.0f, 209.0f / 255.0f, 1.0f};
430  }
431 
432  static constexpr Color DarkViolet() {
433  return {148.0f / 255.0f, 0.0f / 255.0f, 211.0f / 255.0f, 1.0f};
434  }
435 
436  static constexpr Color DeepPink() {
437  return {255.0f / 255.0f, 20.0f / 255.0f, 147.0f / 255.0f, 1.0f};
438  }
439 
440  static constexpr Color DeepSkyBlue() {
441  return {0.0f / 255.0f, 191.0f / 255.0f, 255.0f / 255.0f, 1.0f};
442  }
443 
444  static constexpr Color DimGray() {
445  return {105.0f / 255.0f, 105.0f / 255.0f, 105.0f / 255.0f, 1.0f};
446  }
447 
448  static constexpr Color DimGrey() {
449  return {105.0f / 255.0f, 105.0f / 255.0f, 105.0f / 255.0f, 1.0f};
450  }
451 
452  static constexpr Color DodgerBlue() {
453  return {30.0f / 255.0f, 144.0f / 255.0f, 255.0f / 255.0f, 1.0f};
454  }
455 
456  static constexpr Color Firebrick() {
457  return {178.0f / 255.0f, 34.0f / 255.0f, 34.0f / 255.0f, 1.0f};
458  }
459 
460  static constexpr Color FloralWhite() {
461  return {255.0f / 255.0f, 250.0f / 255.0f, 240.0f / 255.0f, 1.0f};
462  }
463 
464  static constexpr Color ForestGreen() {
465  return {34.0f / 255.0f, 139.0f / 255.0f, 34.0f / 255.0f, 1.0f};
466  }
467 
468  static constexpr Color Fuchsia() {
469  return {255.0f / 255.0f, 0.0f / 255.0f, 255.0f / 255.0f, 1.0f};
470  }
471 
472  static constexpr Color Gainsboro() {
473  return {220.0f / 255.0f, 220.0f / 255.0f, 220.0f / 255.0f, 1.0f};
474  }
475 
476  static constexpr Color Ghostwhite() {
477  return {248.0f / 255.0f, 248.0f / 255.0f, 255.0f / 255.0f, 1.0f};
478  }
479 
480  static constexpr Color Gold() {
481  return {255.0f / 255.0f, 215.0f / 255.0f, 0.0f / 255.0f, 1.0f};
482  }
483 
484  static constexpr Color Goldenrod() {
485  return {218.0f / 255.0f, 165.0f / 255.0f, 32.0f / 255.0f, 1.0f};
486  }
487 
488  static constexpr Color Gray() {
489  return {128.0f / 255.0f, 128.0f / 255.0f, 128.0f / 255.0f, 1.0f};
490  }
491 
492  static constexpr Color GreenYellow() {
493  return {173.0f / 255.0f, 255.0f / 255.0f, 47.0f / 255.0f, 1.0f};
494  }
495 
496  static constexpr Color Grey() {
497  return {128.0f / 255.0f, 128.0f / 255.0f, 128.0f / 255.0f, 1.0f};
498  }
499 
500  static constexpr Color Honeydew() {
501  return {240.0f / 255.0f, 255.0f / 255.0f, 240.0f / 255.0f, 1.0f};
502  }
503 
504  static constexpr Color HotPink() {
505  return {255.0f / 255.0f, 105.0f / 255.0f, 180.0f / 255.0f, 1.0f};
506  }
507 
508  static constexpr Color IndianRed() {
509  return {205.0f / 255.0f, 92.0f / 255.0f, 92.0f / 255.0f, 1.0f};
510  }
511 
512  static constexpr Color Indigo() {
513  return {75.0f / 255.0f, 0.0f / 255.0f, 130.0f / 255.0f, 1.0f};
514  }
515 
516  static constexpr Color Ivory() {
517  return {255.0f / 255.0f, 255.0f / 255.0f, 240.0f / 255.0f, 1.0f};
518  }
519 
520  static constexpr Color Khaki() {
521  return {240.0f / 255.0f, 230.0f / 255.0f, 140.0f / 255.0f, 1.0f};
522  }
523 
524  static constexpr Color Lavender() {
525  return {230.0f / 255.0f, 230.0f / 255.0f, 250.0f / 255.0f, 1.0f};
526  }
527 
528  static constexpr Color LavenderBlush() {
529  return {255.0f / 255.0f, 240.0f / 255.0f, 245.0f / 255.0f, 1.0f};
530  }
531 
532  static constexpr Color LawnGreen() {
533  return {124.0f / 255.0f, 252.0f / 255.0f, 0.0f / 255.0f, 1.0f};
534  }
535 
536  static constexpr Color LemonChiffon() {
537  return {255.0f / 255.0f, 250.0f / 255.0f, 205.0f / 255.0f, 1.0f};
538  }
539 
540  static constexpr Color LightBlue() {
541  return {173.0f / 255.0f, 216.0f / 255.0f, 230.0f / 255.0f, 1.0f};
542  }
543 
544  static constexpr Color LightCoral() {
545  return {240.0f / 255.0f, 128.0f / 255.0f, 128.0f / 255.0f, 1.0f};
546  }
547 
548  static constexpr Color LightCyan() {
549  return {224.0f / 255.0f, 255.0f / 255.0f, 255.0f / 255.0f, 1.0f};
550  }
551 
552  static constexpr Color LightGoldenrodYellow() {
553  return {50.0f / 255.0f, 250.0f / 255.0f, 210.0f / 255.0f, 1.0f};
554  }
555 
556  static constexpr Color LightGray() {
557  return {211.0f / 255.0f, 211.0f / 255.0f, 211.0f / 255.0f, 1.0f};
558  }
559 
560  static constexpr Color LightGreen() {
561  return {144.0f / 255.0f, 238.0f / 255.0f, 144.0f / 255.0f, 1.0f};
562  }
563 
564  static constexpr Color LightGrey() {
565  return {211.0f / 255.0f, 211.0f / 255.0f, 211.0f / 255.0f, 1.0f};
566  }
567 
568  static constexpr Color LightPink() {
569  return {255.0f / 255.0f, 182.0f / 255.0f, 193.0f / 255.0f, 1.0f};
570  }
571 
572  static constexpr Color LightSalmon() {
573  return {255.0f / 255.0f, 160.0f / 255.0f, 122.0f / 255.0f, 1.0f};
574  }
575 
576  static constexpr Color LightSeaGreen() {
577  return {32.0f / 255.0f, 178.0f / 255.0f, 170.0f / 255.0f, 1.0f};
578  }
579 
580  static constexpr Color LightSkyBlue() {
581  return {135.0f / 255.0f, 206.0f / 255.0f, 250.0f / 255.0f, 1.0f};
582  }
583 
584  static constexpr Color LightSlateGray() {
585  return {119.0f / 255.0f, 136.0f / 255.0f, 153.0f / 255.0f, 1.0f};
586  }
587 
588  static constexpr Color LightSlateGrey() {
589  return {119.0f / 255.0f, 136.0f / 255.0f, 153.0f / 255.0f, 1.0f};
590  }
591 
592  static constexpr Color LightSteelBlue() {
593  return {176.0f / 255.0f, 196.0f / 255.0f, 222.0f / 255.0f, 1.0f};
594  }
595 
596  static constexpr Color LightYellow() {
597  return {255.0f / 255.0f, 255.0f / 255.0f, 224.0f / 255.0f, 1.0f};
598  }
599 
600  static constexpr Color Lime() {
601  return {0.0f / 255.0f, 255.0f / 255.0f, 0.0f / 255.0f, 1.0f};
602  }
603 
604  static constexpr Color LimeGreen() {
605  return {50.0f / 255.0f, 205.0f / 255.0f, 50.0f / 255.0f, 1.0f};
606  }
607 
608  static constexpr Color Linen() {
609  return {250.0f / 255.0f, 240.0f / 255.0f, 230.0f / 255.0f, 1.0f};
610  }
611 
612  static constexpr Color Magenta() {
613  return {255.0f / 255.0f, 0.0f / 255.0f, 255.0f / 255.0f, 1.0f};
614  }
615 
616  static constexpr Color Maroon() {
617  return {128.0f / 255.0f, 0.0f / 255.0f, 0.0f / 255.0f, 1.0f};
618  }
619 
620  static constexpr Color MediumAquamarine() {
621  return {102.0f / 255.0f, 205.0f / 255.0f, 170.0f / 255.0f, 1.0f};
622  }
623 
624  static constexpr Color MediumBlue() {
625  return {0.0f / 255.0f, 0.0f / 255.0f, 205.0f / 255.0f, 1.0f};
626  }
627 
628  static constexpr Color MediumOrchid() {
629  return {186.0f / 255.0f, 85.0f / 255.0f, 211.0f / 255.0f, 1.0f};
630  }
631 
632  static constexpr Color MediumPurple() {
633  return {147.0f / 255.0f, 112.0f / 255.0f, 219.0f / 255.0f, 1.0f};
634  }
635 
636  static constexpr Color MediumSeagreen() {
637  return {60.0f / 255.0f, 179.0f / 255.0f, 113.0f / 255.0f, 1.0f};
638  }
639 
640  static constexpr Color MediumSlateBlue() {
641  return {123.0f / 255.0f, 104.0f / 255.0f, 238.0f / 255.0f, 1.0f};
642  }
643 
644  static constexpr Color MediumSpringGreen() {
645  return {0.0f / 255.0f, 250.0f / 255.0f, 154.0f / 255.0f, 1.0f};
646  }
647 
648  static constexpr Color MediumTurquoise() {
649  return {72.0f / 255.0f, 209.0f / 255.0f, 204.0f / 255.0f, 1.0f};
650  }
651 
652  static constexpr Color MediumVioletRed() {
653  return {199.0f / 255.0f, 21.0f / 255.0f, 133.0f / 255.0f, 1.0f};
654  }
655 
656  static constexpr Color MidnightBlue() {
657  return {25.0f / 255.0f, 25.0f / 255.0f, 112.0f / 255.0f, 1.0f};
658  }
659 
660  static constexpr Color MintCream() {
661  return {245.0f / 255.0f, 255.0f / 255.0f, 250.0f / 255.0f, 1.0f};
662  }
663 
664  static constexpr Color MistyRose() {
665  return {255.0f / 255.0f, 228.0f / 255.0f, 225.0f / 255.0f, 1.0f};
666  }
667 
668  static constexpr Color Moccasin() {
669  return {255.0f / 255.0f, 228.0f / 255.0f, 181.0f / 255.0f, 1.0f};
670  }
671 
672  static constexpr Color NavajoWhite() {
673  return {255.0f / 255.0f, 222.0f / 255.0f, 173.0f / 255.0f, 1.0f};
674  }
675 
676  static constexpr Color Navy() {
677  return {0.0f / 255.0f, 0.0f / 255.0f, 128.0f / 255.0f, 1.0f};
678  }
679 
680  static constexpr Color OldLace() {
681  return {253.0f / 255.0f, 245.0f / 255.0f, 230.0f / 255.0f, 1.0f};
682  }
683 
684  static constexpr Color Olive() {
685  return {128.0f / 255.0f, 128.0f / 255.0f, 0.0f / 255.0f, 1.0f};
686  }
687 
688  static constexpr Color OliveDrab() {
689  return {107.0f / 255.0f, 142.0f / 255.0f, 35.0f / 255.0f, 1.0f};
690  }
691 
692  static constexpr Color Orange() {
693  return {255.0f / 255.0f, 165.0f / 255.0f, 0.0f / 255.0f, 1.0f};
694  }
695 
696  static constexpr Color OrangeRed() {
697  return {255.0f / 255.0f, 69.0f / 255.0f, 0.0f / 255.0f, 1.0f};
698  }
699 
700  static constexpr Color Orchid() {
701  return {218.0f / 255.0f, 112.0f / 255.0f, 214.0f / 255.0f, 1.0f};
702  }
703 
704  static constexpr Color PaleGoldenrod() {
705  return {238.0f / 255.0f, 232.0f / 255.0f, 170.0f / 255.0f, 1.0f};
706  }
707 
708  static constexpr Color PaleGreen() {
709  return {152.0f / 255.0f, 251.0f / 255.0f, 152.0f / 255.0f, 1.0f};
710  }
711 
712  static constexpr Color PaleTurquoise() {
713  return {175.0f / 255.0f, 238.0f / 255.0f, 238.0f / 255.0f, 1.0f};
714  }
715 
716  static constexpr Color PaleVioletRed() {
717  return {219.0f / 255.0f, 112.0f / 255.0f, 147.0f / 255.0f, 1.0f};
718  }
719 
720  static constexpr Color PapayaWhip() {
721  return {255.0f / 255.0f, 239.0f / 255.0f, 213.0f / 255.0f, 1.0f};
722  }
723 
724  static constexpr Color Peachpuff() {
725  return {255.0f / 255.0f, 218.0f / 255.0f, 185.0f / 255.0f, 1.0f};
726  }
727 
728  static constexpr Color Peru() {
729  return {205.0f / 255.0f, 133.0f / 255.0f, 63.0f / 255.0f, 1.0f};
730  }
731 
732  static constexpr Color Pink() {
733  return {255.0f / 255.0f, 192.0f / 255.0f, 203.0f / 255.0f, 1.0f};
734  }
735 
736  static constexpr Color Plum() {
737  return {221.0f / 255.0f, 160.0f / 255.0f, 221.0f / 255.0f, 1.0f};
738  }
739 
740  static constexpr Color PowderBlue() {
741  return {176.0f / 255.0f, 224.0f / 255.0f, 230.0f / 255.0f, 1.0f};
742  }
743 
744  static constexpr Color Purple() {
745  return {128.0f / 255.0f, 0.0f / 255.0f, 128.0f / 255.0f, 1.0f};
746  }
747 
748  static constexpr Color RosyBrown() {
749  return {188.0f / 255.0f, 143.0f / 255.0f, 143.0f / 255.0f, 1.0f};
750  }
751 
752  static constexpr Color RoyalBlue() {
753  return {65.0f / 255.0f, 105.0f / 255.0f, 225.0f / 255.0f, 1.0f};
754  }
755 
756  static constexpr Color SaddleBrown() {
757  return {139.0f / 255.0f, 69.0f / 255.0f, 19.0f / 255.0f, 1.0f};
758  }
759 
760  static constexpr Color Salmon() {
761  return {250.0f / 255.0f, 128.0f / 255.0f, 114.0f / 255.0f, 1.0f};
762  }
763 
764  static constexpr Color SandyBrown() {
765  return {244.0f / 255.0f, 164.0f / 255.0f, 96.0f / 255.0f, 1.0f};
766  }
767 
768  static constexpr Color Seagreen() {
769  return {46.0f / 255.0f, 139.0f / 255.0f, 87.0f / 255.0f, 1.0f};
770  }
771 
772  static constexpr Color Seashell() {
773  return {255.0f / 255.0f, 245.0f / 255.0f, 238.0f / 255.0f, 1.0f};
774  }
775 
776  static constexpr Color Sienna() {
777  return {160.0f / 255.0f, 82.0f / 255.0f, 45.0f / 255.0f, 1.0f};
778  }
779 
780  static constexpr Color Silver() {
781  return {192.0f / 255.0f, 192.0f / 255.0f, 192.0f / 255.0f, 1.0f};
782  }
783 
784  static constexpr Color SkyBlue() {
785  return {135.0f / 255.0f, 206.0f / 255.0f, 235.0f / 255.0f, 1.0f};
786  }
787 
788  static constexpr Color SlateBlue() {
789  return {106.0f / 255.0f, 90.0f / 255.0f, 205.0f / 255.0f, 1.0f};
790  }
791 
792  static constexpr Color SlateGray() {
793  return {112.0f / 255.0f, 128.0f / 255.0f, 144.0f / 255.0f, 1.0f};
794  }
795 
796  static constexpr Color SlateGrey() {
797  return {112.0f / 255.0f, 128.0f / 255.0f, 144.0f / 255.0f, 1.0f};
798  }
799 
800  static constexpr Color Snow() {
801  return {255.0f / 255.0f, 250.0f / 255.0f, 250.0f / 255.0f, 1.0f};
802  }
803 
804  static constexpr Color SpringGreen() {
805  return {0.0f / 255.0f, 255.0f / 255.0f, 127.0f / 255.0f, 1.0f};
806  }
807 
808  static constexpr Color SteelBlue() {
809  return {70.0f / 255.0f, 130.0f / 255.0f, 180.0f / 255.0f, 1.0f};
810  }
811 
812  static constexpr Color Tan() {
813  return {210.0f / 255.0f, 180.0f / 255.0f, 140.0f / 255.0f, 1.0f};
814  }
815 
816  static constexpr Color Teal() {
817  return {0.0f / 255.0f, 128.0f / 255.0f, 128.0f / 255.0f, 1.0f};
818  }
819 
820  static constexpr Color Thistle() {
821  return {216.0f / 255.0f, 191.0f / 255.0f, 216.0f / 255.0f, 1.0f};
822  }
823 
824  static constexpr Color Tomato() {
825  return {255.0f / 255.0f, 99.0f / 255.0f, 71.0f / 255.0f, 1.0f};
826  }
827 
828  static constexpr Color Turquoise() {
829  return {64.0f / 255.0f, 224.0f / 255.0f, 208.0f / 255.0f, 1.0f};
830  }
831 
832  static constexpr Color Violet() {
833  return {238.0f / 255.0f, 130.0f / 255.0f, 238.0f / 255.0f, 1.0f};
834  }
835 
836  static constexpr Color Wheat() {
837  return {245.0f / 255.0f, 222.0f / 255.0f, 179.0f / 255.0f, 1.0f};
838  }
839 
840  static constexpr Color Whitesmoke() {
841  return {245.0f / 255.0f, 245.0f / 255.0f, 245.0f / 255.0f, 1.0f};
842  }
843 
844  static constexpr Color Yellow() {
845  return {255.0f / 255.0f, 255.0f / 255.0f, 0.0f / 255.0f, 1.0f};
846  }
847 
848  static constexpr Color YellowGreen() {
849  return {154.0f / 255.0f, 205.0f / 255.0f, 50.0f / 255.0f, 1.0f};
850  }
851 
852  static Color Random() {
853  return {
854  // This method is not used for cryptographic purposes.
855  // NOLINTBEGIN(clang-analyzer-security.insecureAPI.rand)
856  static_cast<Scalar>((std::rand() % 255) / 255.0f), //
857  static_cast<Scalar>((std::rand() % 255) / 255.0f), //
858  static_cast<Scalar>((std::rand() % 255) / 255.0f), //
859  // NOLINTEND(clang-analyzer-security.insecureAPI.rand)
860  1.0f //
861 
862  };
863  }
864 
865  /// @brief Blends an unpremultiplied destination color into a given
866  /// unpremultiplied source color to form a new unpremultiplied color.
867  ///
868  /// If either the source or destination are premultiplied, the result
869  /// will be incorrect.
870  Color Blend(Color source, BlendMode blend_mode) const;
871 
872  /// @brief A color filter that transforms colors through a 4x5 color matrix.
873  ///
874  /// This filter can be used to change the saturation of pixels, convert
875  /// from YUV to RGB, etc.
876  ///
877  /// Each channel of the output color is clamped to the 0 to 1 range.
878  ///
879  /// @see `ColorMatrix`
880  Color ApplyColorMatrix(const ColorMatrix& color_matrix) const;
881 
882  /// @brief Convert the color from linear space to sRGB space.
883  ///
884  /// The color is assumed to be unpremultiplied. If the color is
885  /// premultipled, the conversion output will be incorrect.
886  Color LinearToSRGB() const;
887 
888  /// @brief Convert the color from sRGB space to linear space.
889  ///
890  /// The color is assumed to be unpremultiplied. If the color is
891  /// premultipled, the conversion output will be incorrect.
892  Color SRGBToLinear() const;
893 
894  constexpr bool IsTransparent() const { return alpha == 0.0f; }
895 
896  constexpr bool IsOpaque() const { return alpha == 1.0f; }
897 };
898 
899 template <class T, class = std::enable_if_t<std::is_arithmetic_v<T>>>
900 constexpr inline Color operator+(T value, const Color& c) {
901  return c + static_cast<Scalar>(value);
902 }
903 
904 template <class T, class = std::enable_if_t<std::is_arithmetic_v<T>>>
905 constexpr inline Color operator-(T value, const Color& c) {
906  auto v = static_cast<Scalar>(value);
907  return {v - c.red, v - c.green, v - c.blue, v - c.alpha};
908 }
909 
910 template <class T, class = std::enable_if_t<std::is_arithmetic_v<T>>>
911 constexpr inline Color operator*(T value, const Color& c) {
912  return c * static_cast<Scalar>(value);
913 }
914 
915 template <class T, class = std::enable_if_t<std::is_arithmetic_v<T>>>
916 constexpr inline Color operator/(T value, const Color& c) {
917  auto v = static_cast<Scalar>(value);
918  return {v / c.red, v / c.green, v / c.blue, v / c.alpha};
919 }
920 
921 std::string ColorToString(const Color& color);
922 
923 /**
924  * Represents a color by its constituent hue, saturation, brightness and alpha
925  */
926 struct ColorHSB {
927  /**
928  * The hue of the color (0 to 1)
929  */
930  Scalar hue;
931 
932  /**
933  * The saturation of the color (0 to 1)
934  */
935  Scalar saturation;
936 
937  /**
938  * The brightness of the color (0 to 1)
939  */
940  Scalar brightness;
941 
942  /**
943  * The alpha of the color (0 to 1)
944  */
945  Scalar alpha;
946 
947  constexpr ColorHSB(Scalar h, Scalar s, Scalar b, Scalar a)
948  : hue(h), saturation(s), brightness(b), alpha(a) {}
949 
950  static ColorHSB FromRGB(Color rgb);
951 
952  Color ToRGBA() const;
953 };
954 
955 static_assert(sizeof(Color) == 4 * sizeof(Scalar));
956 
957 } // namespace impeller
958 
959 namespace std {
960 
961 inline std::ostream& operator<<(std::ostream& out, const impeller::Color& c) {
962  out << "(" << c.red << ", " << c.green << ", " << c.blue << ", " << c.alpha
963  << ")";
964  return out;
965 }
966 
967 } // namespace std
968 
969 #endif // FLUTTER_IMPELLER_GEOMETRY_COLOR_H_
impeller::Color::DarkMagenta
static constexpr Color DarkMagenta()
Definition: color.h:388
impeller::Color::operator/
constexpr Color operator/(T value) const
Definition: color.h:209
impeller::Color::Blue
static constexpr Color Blue()
Definition: color.h:278
impeller::Color::Navy
static constexpr Color Navy()
Definition: color.h:676
impeller::Color::SaddleBrown
static constexpr Color SaddleBrown()
Definition: color.h:756
impeller::Color::DeepPink
static constexpr Color DeepPink()
Definition: color.h:436
impeller::Color::operator*
constexpr Color operator*(T value) const
Definition: color.h:199
impeller::Color::DimGray
static constexpr Color DimGray()
Definition: color.h:444
impeller::BlendModeToString
const char * BlendModeToString(BlendMode blend_mode)
Definition: color.cc:47
impeller::Color::Beige
static constexpr Color Beige()
Definition: color.h:304
impeller::Color::Cyan
static constexpr Color Cyan()
Definition: color.h:356
impeller::Color::MediumOrchid
static constexpr Color MediumOrchid()
Definition: color.h:628
impeller::BlendMode::kDestinationATop
@ kDestinationATop
impeller::ColorToString
std::string ColorToString(const Color &color)
Definition: color.cc:410
impeller::Color::DarkSalmon
static constexpr Color DarkSalmon()
Definition: color.h:408
impeller::Color::PaleTurquoise
static constexpr Color PaleTurquoise()
Definition: color.h:712
impeller::Color::SandyBrown
static constexpr Color SandyBrown()
Definition: color.h:764
impeller::Color::YellowGreen
static constexpr Color YellowGreen()
Definition: color.h:848
impeller::Scalar
float Scalar
Definition: scalar.h:18
impeller::Color::DarkGray
static constexpr Color DarkGray()
Definition: color.h:372
impeller::Color::Seashell
static constexpr Color Seashell()
Definition: color.h:772
impeller::Color::DeepSkyBlue
static constexpr Color DeepSkyBlue()
Definition: color.h:440
impeller::Color::Red
static constexpr Color Red()
Definition: color.h:274
impeller::Color::ForestGreen
static constexpr Color ForestGreen()
Definition: color.h:464
impeller::Color::Color
constexpr Color()
Definition: color.h:145
impeller::Color::BlanchedAlmond
static constexpr Color BlanchedAlmond()
Definition: color.h:312
impeller::Color::Khaki
static constexpr Color Khaki()
Definition: color.h:520
impeller::Color::Lavender
static constexpr Color Lavender()
Definition: color.h:524
impeller::ColorHSB::brightness
Scalar brightness
Definition: color.h:940
impeller::Color::Silver
static constexpr Color Silver()
Definition: color.h:780
impeller::Color::operator+
constexpr Color operator+(T value) const
Definition: color.h:179
impeller::BlendMode
BlendMode
Definition: color.h:59
impeller::Color::MakeRGBA8
static constexpr Color MakeRGBA8(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
Definition: color.h:154
impeller::Color
Definition: color.h:124
impeller::Color::MediumAquamarine
static constexpr Color MediumAquamarine()
Definition: color.h:620
impeller::Color::Indigo
static constexpr Color Indigo()
Definition: color.h:512
impeller::Color::Unpremultiply
constexpr Color Unpremultiply() const
Definition: color.h:218
impeller::Color::Tan
static constexpr Color Tan()
Definition: color.h:812
impeller::Color::IsTransparent
constexpr bool IsTransparent() const
Definition: color.h:894
impeller::Color::SlateBlue
static constexpr Color SlateBlue()
Definition: color.h:788
impeller::Color::LightSkyBlue
static constexpr Color LightSkyBlue()
Definition: color.h:580
impeller::Color::Teal
static constexpr Color Teal()
Definition: color.h:816
impeller::Color::LightSlateGrey
static constexpr Color LightSlateGrey()
Definition: color.h:588
impeller::Color::Gainsboro
static constexpr Color Gainsboro()
Definition: color.h:472
impeller::Vector4
Definition: vector.h:232
impeller::Color::MediumPurple
static constexpr Color MediumPurple()
Definition: color.h:632
impeller::BlendMode::kLuminosity
@ kLuminosity
impeller::BlendMode::kSource
@ kSource
impeller::Color::Chocolate
static constexpr Color Chocolate()
Definition: color.h:336
impeller::BlendMode::kColorDodge
@ kColorDodge
impeller::BlendMode::kDestination
@ kDestination
impeller::Color::Purple
static constexpr Color Purple()
Definition: color.h:744
impeller::BlendMode::kDarken
@ kDarken
impeller::Color::PaleGreen
static constexpr Color PaleGreen()
Definition: color.h:708
impeller::Color::Turquoise
static constexpr Color Turquoise()
Definition: color.h:828
impeller::BlendMode::kColor
@ kColor
impeller::Color::alpha
Scalar alpha
Definition: color.h:143
impeller::BlendMode::kDestinationOver
@ kDestinationOver
impeller::Color::DarkSlateGrey
static constexpr Color DarkSlateGrey()
Definition: color.h:424
impeller::BlendMode::kPlus
@ kPlus
impeller::Color::MintCream
static constexpr Color MintCream()
Definition: color.h:660
std::operator<<
std::ostream & operator<<(std::ostream &out, const impeller::Color &c)
Definition: color.h:961
impeller::Color::SlateGrey
static constexpr Color SlateGrey()
Definition: color.h:796
impeller::Color::CadetBlue
static constexpr Color CadetBlue()
Definition: color.h:328
impeller::Color::operator-
constexpr Color operator-(T value) const
Definition: color.h:189
impeller::Color::CornflowerBlue
static constexpr Color CornflowerBlue()
Definition: color.h:344
impeller::BlendMode::kOverlay
@ kOverlay
impeller::Color::LightGrey
static constexpr Color LightGrey()
Definition: color.h:564
impeller::Color::DodgerBlue
static constexpr Color DodgerBlue()
Definition: color.h:452
impeller::Color::ToARGB
constexpr uint32_t ToARGB() const
Convert to ARGB 32 bit color.
Definition: color.h:261
impeller::Color::LightCyan
static constexpr Color LightCyan()
Definition: color.h:548
impeller::Color::Yellow
static constexpr Color Yellow()
Definition: color.h:844
impeller::Color::Fuchsia
static constexpr Color Fuchsia()
Definition: color.h:468
impeller::operator*
constexpr Color operator*(T value, const Color &c)
Definition: color.h:911
impeller::Color::LightGray
static constexpr Color LightGray()
Definition: color.h:556
impeller::Color::Wheat
static constexpr Color Wheat()
Definition: color.h:836
impeller::Color::Clamp01
constexpr Color Clamp01() const
Definition: color.h:238
impeller::Color::green
Scalar green
Definition: color.h:133
impeller::Color::DarkViolet
static constexpr Color DarkViolet()
Definition: color.h:432
impeller::Color::Snow
static constexpr Color Snow()
Definition: color.h:800
impeller::Color::PapayaWhip
static constexpr Color PapayaWhip()
Definition: color.h:720
impeller::BlendMode::kModulate
@ kModulate
impeller::Color::Maroon
static constexpr Color Maroon()
Definition: color.h:616
impeller::Color::NavajoWhite
static constexpr Color NavajoWhite()
Definition: color.h:672
impeller::Color::DarkGrey
static constexpr Color DarkGrey()
Definition: color.h:380
impeller::BlendMode::kSourceOut
@ kSourceOut
impeller::BlendMode::kSaturation
@ kSaturation
impeller::Color::DarkKhaki
static constexpr Color DarkKhaki()
Definition: color.h:384
impeller::Color::LightPink
static constexpr Color LightPink()
Definition: color.h:568
impeller::Color::Ivory
static constexpr Color Ivory()
Definition: color.h:516
impeller::BlendMode::kDifference
@ kDifference
impeller::ColorHSB
Definition: color.h:926
impeller::Color::PaleGoldenrod
static constexpr Color PaleGoldenrod()
Definition: color.h:704
impeller::Color::Brown
static constexpr Color Brown()
Definition: color.h:320
impeller::Color::Magenta
static constexpr Color Magenta()
Definition: color.h:612
impeller::BlendMode::kLighten
@ kLighten
impeller::Color::MidnightBlue
static constexpr Color MidnightBlue()
Definition: color.h:656
impeller::Color::DarkSlateGray
static constexpr Color DarkSlateGray()
Definition: color.h:420
impeller::Color::Goldenrod
static constexpr Color Goldenrod()
Definition: color.h:484
impeller::Color::operator*
constexpr Color operator*(const Color &c) const
Definition: color.h:194
impeller::BlendMode::kSoftLight
@ kSoftLight
impeller::Color::PowderBlue
static constexpr Color PowderBlue()
Definition: color.h:740
impeller::Color::Gray
static constexpr Color Gray()
Definition: color.h:488
impeller::BlendMode::kColorBurn
@ kColorBurn
impeller::Color::LemonChiffon
static constexpr Color LemonChiffon()
Definition: color.h:536
impeller::Color::OrangeRed
static constexpr Color OrangeRed()
Definition: color.h:696
impeller::Color::Azure
static constexpr Color Azure()
Definition: color.h:300
impeller::BlendMode::kHardLight
@ kHardLight
impeller::Color::Firebrick
static constexpr Color Firebrick()
Definition: color.h:456
impeller::Color::operator-
constexpr Color operator-(const Color &c) const
Definition: color.h:184
impeller::Color::Gold
static constexpr Color Gold()
Definition: color.h:480
impeller::Color::ToIColor
static constexpr uint32_t ToIColor(Color color)
Convert this color to a 32-bit representation.
Definition: color.h:161
impeller::Color::PaleVioletRed
static constexpr Color PaleVioletRed()
Definition: color.h:716
impeller::Color::SRGBToLinear
Color SRGBToLinear() const
Convert the color from sRGB space to linear space.
Definition: color.cc:399
impeller::ColorHSB::alpha
Scalar alpha
Definition: color.h:945
impeller::Color::Honeydew
static constexpr Color Honeydew()
Definition: color.h:500
impeller::BlendMode::kClear
@ kClear
impeller::Color::Salmon
static constexpr Color Salmon()
Definition: color.h:760
impeller::Color::LightBlue
static constexpr Color LightBlue()
Definition: color.h:540
impeller::YUVColorSpace::kBT601FullRange
@ kBT601FullRange
impeller::Color::OldLace
static constexpr Color OldLace()
Definition: color.h:680
impeller::Color::DarkBlue
static constexpr Color DarkBlue()
Definition: color.h:360
impeller::Color::IndianRed
static constexpr Color IndianRed()
Definition: color.h:508
impeller::Color::WithAlpha
constexpr Color WithAlpha(Scalar new_alpha) const
Definition: color.h:280
impeller::Color::MediumVioletRed
static constexpr Color MediumVioletRed()
Definition: color.h:652
impeller::Color::SkyBlue
static constexpr Color SkyBlue()
Definition: color.h:784
impeller::Color::DarkSlateBlue
static constexpr Color DarkSlateBlue()
Definition: color.h:416
impeller::ColorMatrix::array
Scalar array[20]
Definition: color.h:118
impeller::Color::RoyalBlue
static constexpr Color RoyalBlue()
Definition: color.h:752
impeller::Color::LightSlateGray
static constexpr Color LightSlateGray()
Definition: color.h:584
impeller::Color::operator+
constexpr Color operator+(const Color &c) const
Definition: color.h:174
impeller::Color::ToR8G8B8A8
constexpr std::array< uint8_t, 4 > ToR8G8B8A8() const
Convert to R8G8B8A8 representation.
Definition: color.h:248
impeller::Color::red
Scalar red
Definition: color.h:128
impeller::Color::MistyRose
static constexpr Color MistyRose()
Definition: color.h:664
impeller::Color::AquaMarine
static constexpr Color AquaMarine()
Definition: color.h:296
impeller::Color::LightCoral
static constexpr Color LightCoral()
Definition: color.h:544
impeller::Color::Random
static Color Random()
Definition: color.h:852
impeller::Color::LightSteelBlue
static constexpr Color LightSteelBlue()
Definition: color.h:592
impeller::Color::Grey
static constexpr Color Grey()
Definition: color.h:496
impeller::Color::Cornsilk
static constexpr Color Cornsilk()
Definition: color.h:348
impeller::Color::White
static constexpr Color White()
Definition: color.h:266
impeller::Color::Violet
static constexpr Color Violet()
Definition: color.h:832
impeller::Color::Peachpuff
static constexpr Color Peachpuff()
Definition: color.h:724
impeller::Color::Moccasin
static constexpr Color Moccasin()
Definition: color.h:668
impeller::Color::Chartreuse
static constexpr Color Chartreuse()
Definition: color.h:332
impeller::Color::Pink
static constexpr Color Pink()
Definition: color.h:732
impeller::Color::LightYellow
static constexpr Color LightYellow()
Definition: color.h:596
impeller::Color::Peru
static constexpr Color Peru()
Definition: color.h:728
impeller::Color::OliveDrab
static constexpr Color OliveDrab()
Definition: color.h:688
impeller::Color::Green
static constexpr Color Green()
Definition: color.h:276
impeller::Color::LightGreen
static constexpr Color LightGreen()
Definition: color.h:560
impeller::Color::HotPink
static constexpr Color HotPink()
Definition: color.h:504
impeller::Color::DarkOrchid
static constexpr Color DarkOrchid()
Definition: color.h:400
impeller::Color::MediumBlue
static constexpr Color MediumBlue()
Definition: color.h:624
impeller::Color::DarkOliveGreen
static constexpr Color DarkOliveGreen()
Definition: color.h:392
impeller::Color::Linen
static constexpr Color Linen()
Definition: color.h:608
impeller::ColorHSB::FromRGB
static ColorHSB FromRGB(Color rgb)
Definition: color.cc:52
impeller::YUVColorSpace::kBT601LimitedRange
@ kBT601LimitedRange
impeller::Color::Color
constexpr Color(Scalar r, Scalar g, Scalar b, Scalar a)
Definition: color.h:151
impeller::Color::SpringGreen
static constexpr Color SpringGreen()
Definition: color.h:804
impeller::operator-
constexpr Color operator-(T value, const Color &c)
Definition: color.h:905
scalar.h
impeller::Color::AntiqueWhite
static constexpr Color AntiqueWhite()
Definition: color.h:288
impeller::ColorHSB::ToRGBA
Color ToRGBA() const
Definition: color.cc:79
impeller::Color::LightSeaGreen
static constexpr Color LightSeaGreen()
Definition: color.h:576
impeller::BlendMode::kDestinationIn
@ kDestinationIn
impeller::Color::MediumTurquoise
static constexpr Color MediumTurquoise()
Definition: color.h:648
impeller::Color::Ghostwhite
static constexpr Color Ghostwhite()
Definition: color.h:476
impeller::BlendMode::kExclusion
@ kExclusion
impeller::BlendMode::kDestinationOut
@ kDestinationOut
impeller::Color::SlateGray
static constexpr Color SlateGray()
Definition: color.h:792
impeller::Color::GreenYellow
static constexpr Color GreenYellow()
Definition: color.h:492
impeller::Color::DarkCyan
static constexpr Color DarkCyan()
Definition: color.h:364
impeller::Color::Orange
static constexpr Color Orange()
Definition: color.h:692
std
Definition: comparable.h:95
impeller::Color::SteelBlue
static constexpr Color SteelBlue()
Definition: color.h:808
impeller::Color::FloralWhite
static constexpr Color FloralWhite()
Definition: color.h:460
impeller::ColorHSB::saturation
Scalar saturation
Definition: color.h:935
type_traits.h
impeller::Color::RosyBrown
static constexpr Color RosyBrown()
Definition: color.h:748
impeller::Color::DarkTurquoise
static constexpr Color DarkTurquoise()
Definition: color.h:428
impeller::ColorHSB::ColorHSB
constexpr ColorHSB(Scalar h, Scalar s, Scalar b, Scalar a)
Definition: color.h:947
impeller::saturated::b
SI b
Definition: saturated_math.h:87
impeller::Color::LightGoldenrodYellow
static constexpr Color LightGoldenrodYellow()
Definition: color.h:552
impeller::Color::BlackTransparent
static constexpr Color BlackTransparent()
Definition: color.h:272
impeller::Color::Black
static constexpr Color Black()
Definition: color.h:268
impeller::Color::MediumSpringGreen
static constexpr Color MediumSpringGreen()
Definition: color.h:644
impeller::Color::Bisque
static constexpr Color Bisque()
Definition: color.h:308
impeller::Color::Sienna
static constexpr Color Sienna()
Definition: color.h:776
impeller::BlendMode::kSourceIn
@ kSourceIn
impeller::BlendMode::kScreen
@ kScreen
impeller::Color::Thistle
static constexpr Color Thistle()
Definition: color.h:820
impeller::Color::Olive
static constexpr Color Olive()
Definition: color.h:684
impeller::ScalarNearlyEqual
constexpr bool ScalarNearlyEqual(Scalar x, Scalar y, Scalar tolerance=kEhCloseEnough)
Definition: scalar.h:30
impeller::YUVColorSpace
YUVColorSpace
Definition: color.h:55
impeller::Color::Tomato
static constexpr Color Tomato()
Definition: color.h:824
impeller::operator/
constexpr Color operator/(T value, const Color &c)
Definition: color.h:916
impeller::Color::BlueViolet
static constexpr Color BlueViolet()
Definition: color.h:316
impeller::Color::LimeGreen
static constexpr Color LimeGreen()
Definition: color.h:604
impeller::Color::Whitesmoke
static constexpr Color Whitesmoke()
Definition: color.h:840
impeller::Color::WhiteTransparent
static constexpr Color WhiteTransparent()
Definition: color.h:270
impeller::BlendMode::kLast
@ kLast
color
DlColor color
Definition: dl_golden_blur_unittests.cc:23
impeller::Color::LawnGreen
static constexpr Color LawnGreen()
Definition: color.h:532
impeller::Color::operator==
constexpr bool operator==(const Color &c) const
Definition: color.h:169
impeller::Color::AliceBlue
static constexpr Color AliceBlue()
Definition: color.h:284
impeller::BlendMode::kHue
@ kHue
impeller::Color::DarkGreen
static constexpr Color DarkGreen()
Definition: color.h:376
impeller::Color::DarkOrange
static constexpr Color DarkOrange()
Definition: color.h:396
impeller::Color::DarkGoldenrod
static constexpr Color DarkGoldenrod()
Definition: color.h:368
impeller::Color::DarkRed
static constexpr Color DarkRed()
Definition: color.h:404
impeller::BlendMode::kXor
@ kXor
impeller::Color::Seagreen
static constexpr Color Seagreen()
Definition: color.h:768
impeller::Color::Lerp
constexpr static Color Lerp(Color a, Color b, Scalar t)
Return a color that is linearly interpolated between colors a and b, according to the value of t.
Definition: color.h:234
impeller::Color::IsOpaque
constexpr bool IsOpaque() const
Definition: color.h:896
impeller::Color::blue
Scalar blue
Definition: color.h:138
impeller::Color::LightSalmon
static constexpr Color LightSalmon()
Definition: color.h:572
impeller::Color::Coral
static constexpr Color Coral()
Definition: color.h:340
impeller::ColorMatrix
Definition: color.h:117
impeller::Color::ApplyColorMatrix
Color ApplyColorMatrix(const ColorMatrix &color_matrix) const
A color filter that transforms colors through a 4x5 color matrix.
Definition: color.cc:378
impeller::Color::LinearToSRGB
Color LinearToSRGB() const
Convert the color from linear space to sRGB space.
Definition: color.cc:388
impeller::Color::LavenderBlush
static constexpr Color LavenderBlush()
Definition: color.h:528
impeller::Color::operator/
constexpr Color operator/(const Color &c) const
Definition: color.h:204
impeller::Color::DarkSeagreen
static constexpr Color DarkSeagreen()
Definition: color.h:412
impeller::Color::Plum
static constexpr Color Plum()
Definition: color.h:736
impeller
Definition: aiks_blend_unittests.cc:18
impeller::Color::MediumSlateBlue
static constexpr Color MediumSlateBlue()
Definition: color.h:640
impeller::Color::DimGrey
static constexpr Color DimGrey()
Definition: color.h:448
impeller::BlendMode::kSourceATop
@ kSourceATop
impeller::BlendMode::kMultiply
@ kMultiply
impeller::Color::BurlyWood
static constexpr Color BurlyWood()
Definition: color.h:324
impeller::Color::Orchid
static constexpr Color Orchid()
Definition: color.h:700
impeller::Color::Premultiply
constexpr Color Premultiply() const
Definition: color.h:214
impeller::Color::Aqua
static constexpr Color Aqua()
Definition: color.h:292
impeller::BlendMode::kSourceOver
@ kSourceOver
impeller::Color::Lime
static constexpr Color Lime()
Definition: color.h:600
impeller::Color::MediumSeagreen
static constexpr Color MediumSeagreen()
Definition: color.h:636
impeller::Color::Crimson
static constexpr Color Crimson()
Definition: color.h:352
impeller::ColorHSB::hue
Scalar hue
Definition: color.h:930
impeller::operator+
constexpr Color operator+(T value, const Color &c)
Definition: color.h:900
impeller::Color::Blend
Color Blend(Color source, BlendMode blend_mode) const
Blends an unpremultiplied destination color into a given unpremultiplied source color to form a new u...
Definition: color.cc:234