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
22namespace android {
23
24enum class ColorBlindnessType {
25    None,               // Disables the Daltonizer
26    Protanomaly,        // L (red) cone deficient
27    Deuteranomaly,      // M (green) cone deficient (most common)
28    Tritanomaly         // S (blue) cone deficient
29};
30
31enum class ColorBlindnessMode {
32    Simulation,
33    Correction
34};
35
36class Daltonizer {
37public:
38    void setType(ColorBlindnessType type);
39    void setMode(ColorBlindnessMode mode);
40
41    // returns the color transform to apply in the shader
42    const mat4& operator()();
43
44private:
45    void update();
46
47    ColorBlindnessType mType = ColorBlindnessType::None;
48    ColorBlindnessMode mMode = ColorBlindnessMode::Simulation;
49    bool mDirty = true;
50    mat4 mColorTransform;
51};
52
53} /* namespace android */
54#endif /* SF_EFFECTS_DALTONIZER_H_ */
55