55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
/*
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* Copyright (C) 2021-2024 The LineageOS Project
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "Utils.h"
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namespace aidl {
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namespace android {
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namespace hardware {
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namespace light {
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rgb::rgb() : red(0), green(0), blue(0) {}
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rgb::rgb(uint8_t r, uint8_t g, uint8_t b) : red(r), green(g), blue(b){};
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rgb::rgb(uint32_t color) {
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// Extract brightness from AARRGGBB.
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uint8_t alpha = (color >> 24) & 0xFF;
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// Retrieve each of the RGB colors
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red = (color >> 16) & 0xFF;
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green = (color >> 8) & 0xFF;
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blue = color & 0xFF;
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// Scale RGB colors if a brightness has been applied by the user
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if (alpha > 0 && alpha < 0xFF) {
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red = red * alpha / 0xFF;
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green = green * alpha / 0xFF;
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blue = blue * alpha / 0xFF;
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}
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}
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bool rgb::isLit() {
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return !!red || !!green || !!blue;
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}
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static constexpr uint8_t kRedWeight = 77;
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static constexpr uint8_t kGreenWeight = 150;
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static constexpr uint8_t kBlueWeight = 29;
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uint8_t rgb::toBrightness() {
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return (kRedWeight * red + kGreenWeight * green + kBlueWeight * blue) >> 8;
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}
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uint32_t scaleBrightness(uint8_t brightness, uint32_t maxBrightness) {
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return brightness * maxBrightness / 0xFF;
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}
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} // namespace light
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} // namespace hardware
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} // namespace android
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} // namespace aidl
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