1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #ifndef COLOR_H
17 #define COLOR_H
18
19 #include <math.h>
20 #include <cutils/compiler.h>
21 #include <system/graphics.h>
22 #include <ui/PixelFormat.h>
23
24 #include <SkColor.h>
25 #include <SkColorSpace.h>
26 #include <SkImageInfo.h>
27
28 namespace android {
29 namespace uirenderer {
30 namespace Color {
31 enum Color {
32 Red_500 = 0xFFF44336,
33 Pink_500 = 0xFFE91E63,
34 Purple_500 = 0xFF9C27B0,
35 DeepPurple_500 = 0xFF673AB7,
36 Indigo_500 = 0xFF3F51B5,
37 Blue_500 = 0xFF2196F3,
38 LightBlue_300 = 0xFF4FC3F7,
39 LightBlue_500 = 0xFF03A9F4,
40 Cyan_500 = 0xFF00BCD4,
41 Teal_500 = 0xFF008577,
42 Teal_700 = 0xFF00796B,
43 Green_500 = 0xFF4CAF50,
44 Green_700 = 0xFF388E3C,
45 LightGreen_500 = 0xFF8BC34A,
46 LightGreen_700 = 0xFF689F38,
47 Lime_500 = 0xFFCDDC39,
48 Yellow_500 = 0xFFFFEB3B,
49 Amber_500 = 0xFFFFC107,
50 Orange_500 = 0xFFFF9800,
51 DeepOrange_500 = 0xFFFF5722,
52 Brown_500 = 0xFF795548,
53 Grey_200 = 0xFFEEEEEE,
54 Grey_500 = 0xFF9E9E9E,
55 Grey_700 = 0xFF616161,
56 BlueGrey_500 = 0xFF607D8B,
57 Transparent = 0x00000000,
58 Black = 0xFF000000,
59 White = 0xFFFFFFFF,
60 };
61 }
62
63 static_assert(Color::White == SK_ColorWHITE, "color format has changed");
64 static_assert(Color::Black == SK_ColorBLACK, "color format has changed");
65
66 // Array of bright (500 intensity) colors for synthetic content
67 static const Color::Color BrightColors[] = {
68 Color::Red_500, Color::Pink_500, Color::Purple_500, Color::DeepPurple_500,
69 Color::Indigo_500, Color::Blue_500, Color::LightBlue_500, Color::Cyan_500,
70 Color::Teal_500, Color::Green_500, Color::LightGreen_500, Color::Lime_500,
71 Color::Yellow_500, Color::Amber_500, Color::Orange_500, Color::DeepOrange_500,
72 Color::Brown_500, Color::Grey_500, Color::BlueGrey_500,
73 };
74 static constexpr int BrightColorsCount = sizeof(BrightColors) / sizeof(Color::Color);
75
76 enum class TransferFunctionType : int8_t { None = 0, Full, Limited, Gamma };
77
78 // Opto-electronic conversion function for the sRGB color space
79 // Takes a linear sRGB value and converts it to a gamma-encoded sRGB value
OECF_sRGB(float linear)80 static constexpr float OECF_sRGB(float linear) {
81 // IEC 61966-2-1:1999
82 return linear <= 0.0031308f ? linear * 12.92f : (powf(linear, 1.0f / 2.4f) * 1.055f) - 0.055f;
83 }
84
85 // Electro-optical conversion function for the sRGB color space
86 // Takes a gamma-encoded sRGB value and converts it to a linear sRGB value
EOCF_sRGB(float srgb)87 static constexpr float EOCF_sRGB(float srgb) {
88 // IEC 61966-2-1:1999
89 return srgb <= 0.04045f ? srgb / 12.92f : powf((srgb + 0.055f) / 1.055f, 2.4f);
90 }
91
92 android::PixelFormat ColorTypeToPixelFormat(SkColorType colorType);
93 ANDROID_API SkColorType PixelFormatToColorType(android::PixelFormat format);
94
95 ANDROID_API sk_sp<SkColorSpace> DataSpaceToColorSpace(android_dataspace dataspace);
96
97 struct Lab {
98 float L;
99 float a;
100 float b;
101 };
102
103 Lab sRGBToLab(SkColor color);
104 SkColor LabToSRGB(const Lab& lab, SkAlpha alpha);
105
106 } /* namespace uirenderer */
107 } /* namespace android */
108
109 #endif /* COLOR_H */
110