1#pragma once
2
3#include <mbgl/util/optional.hpp>
4
5#include <cassert>
6#include <string>
7#include <array>
8
9namespace mbgl {
10
11// Stores a premultiplied color, with all four channels ranging from 0..1
12class Color {
13public:
14 Color() = default;
15 Color(float r_, float g_, float b_, float a_)
16 : r(r_), g(g_), b(b_), a(a_) {
17 assert(r_ >= 0.0f);
18 assert(r_ <= 1.0f);
19 assert(g_ >= 0.0f);
20 assert(g_ <= 1.0f);
21 assert(b_ >= 0.0f);
22 assert(b_ <= 1.0f);
23 assert(a_ >= 0.0f);
24 assert(a_ <= 1.0f);
25 }
26
27 float r = 0.0f;
28 float g = 0.0f;
29 float b = 0.0f;
30 float a = 0.0f;
31
32 static Color black() { return { 0.0f, 0.0f, 0.0f, 1.0f }; };
33 static Color white() { return { 1.0f, 1.0f, 1.0f, 1.0f }; };
34
35 static Color red() { return { 1.0f, 0.0f, 0.0f, 1.0f }; };
36 static Color green() { return { 0.0f, 1.0f, 0.0f, 1.0f }; };
37 static Color blue() { return { 0.0f, 0.0f, 1.0f, 1.0f }; };
38
39 static optional<Color> parse(const std::string&);
40 std::string stringify() const;
41 std::array<double, 4> toArray() const;
42};
43
44inline bool operator==(const Color& colorA, const Color& colorB) {
45 return colorA.r == colorB.r && colorA.g == colorB.g && colorA.b == colorB.b && colorA.a == colorB.a;
46}
47
48inline bool operator!=(const Color& colorA, const Color& colorB) {
49 return !(colorA == colorB);
50}
51
52inline Color operator*(const Color& color, float alpha) {
53 assert(alpha >= 0.0f);
54 assert(alpha <= 1.0f);
55 return {
56 color.r * alpha,
57 color.g * alpha,
58 color.b * alpha,
59 color.a * alpha
60 };
61}
62
63} // namespace mbgl
64

source code of qtlocation/src/3rdparty/mapbox-gl-native/include/mbgl/util/color.hpp