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      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 enum 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 
     31 enum class ColorBlindnessMode {
     32     Simulation,
     33     Correction
     34 };
     35 
     36 class Daltonizer {
     37 public:
     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 
     44 private:
     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