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