1 /* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef GRAPHICS_EFFECT_TONE_MAPPING_HELPER_H 16 #define GRAPHICS_EFFECT_TONE_MAPPING_HELPER_H 17 18 #include "common/rs_vector2.h" 19 #include "common/rs_vector4.h" 20 #include "draw/color.h" 21 #include "ge_log.h" 22 23 namespace OHOS { 24 namespace Rosen { 25 26 constexpr float EFFECT_MAX_LUMINANCE = 2.0f; 27 28 class GEToneMappingHelper { 29 public: 30 static Vector4f GetBrightnessMapping(float headroom, Vector4f& input); 31 32 static float GetBrightnessMapping(float headroom, float input); 33 34 static Drawing::Color4f GetBrightnessMapping(float brightness, Drawing::Color4f& input); 35 NeedToneMapping(float supportHeadroom)36 static inline bool NeedToneMapping(float supportHeadroom) 37 { 38 return ROSEN_GNE(supportHeadroom, 0.0f) && ROSEN_LNE(supportHeadroom, EFFECT_MAX_LUMINANCE); 39 } 40 41 private: 42 static bool CalcBezierResultY( 43 const Vector2f& start, const Vector2f& end, const Vector2f& control, float x, float& y); 44 }; 45 } // Rosen 46 } // OHOS 47 #endif // GRAPHICS_EFFECT_TONE_MAPPING_HELPER_H