1 /*
2  * Copyright 2013 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 
17 #ifndef SF_EFFECTS_DALTONIZER_H_
18 #define SF_EFFECTS_DALTONIZER_H_
19 
20 #include <math/mat4.h>
21 
22 namespace android {
23 
24 // Forward declare test class
25 class DaltonizerTest;
26 
27 enum class ColorBlindnessType {
28     None,               // Disables the Daltonizer
29     Protanomaly,        // L (red) cone deficient
30     Deuteranomaly,      // M (green) cone deficient (most common)
31     Tritanomaly         // S (blue) cone deficient
32 };
33 
34 enum class ColorBlindnessMode {
35     Simulation,
36     Correction
37 };
38 
39 class Daltonizer {
40 public:
41     void setType(ColorBlindnessType type);
42     void setMode(ColorBlindnessMode mode);
43     // sets level for correction saturation, [0-10].
44     void setLevel(int32_t level);
45 
46     // returns the color transform to apply in the shader
47     const mat4& operator()();
48 
49     // For testing.
50     friend class DaltonizerTest;
51 
52 private:
53     void update();
54 
55     ColorBlindnessType mType = ColorBlindnessType::None;
56     ColorBlindnessMode mMode = ColorBlindnessMode::Simulation;
57     bool mDirty = true;
58     mat4 mColorTransform;
59     // level of error spreading, [0.0-1.0].
60     float mLevel = 0.7f;
61 };
62 
63 } /* namespace android */
64 #endif /* SF_EFFECTS_DALTONIZER_H_ */
65