3568Android11线性调整屏幕亮度

2024-3-30 11:40| 发布者: forqs| 查看: 128| 评论: 0

类目： RK3568系列产品 > Android 文档编号: 1349

在Android11源码OK3568-android11-source/frameworks/base/packages/SettingsLib/src/com/android/settingslib/display/BrightnessUtils.java文件中做如下修改后编译烧写即可：

@@ -76,7 +76,7 @@ public class BrightnessUtils {

public static final float convertGammaToLinearFloat(int val, float min, float max) {

final float normalizedVal = MathUtils.norm(GAMMA_SPACE_MIN, GAMMA_SPACE_MAX, val);

- final float ret;

+ /* final float ret;

if (normalizedVal <= R) {

ret = MathUtils.sq(normalizedVal / R);

} else {

@@ -86,10 +86,10 @@ public class BrightnessUtils {

// HLG is normalized to the range [0, 12], ensure that value is within that range,

// it shouldn't be out of bounds.

final float normalizedRet = MathUtils.constrain(ret, 0, 12);

+*/

// Re-normalize to the range [0, 1]

// in order to derive the correct setting value.

- return MathUtils.lerp(min, max, normalizedRet / 12);

+ return MathUtils.lerp(min, max, normalizedVal);

}

/**

@@ -128,14 +128,13 @@ public class BrightnessUtils {

public static final int convertLinearToGammaFloat(float val, float min, float max) {

// For some reason, HLG normalizes to the range [0, 12] rather than [0, 1]

- final float normalizedVal = MathUtils.norm(min, max, val) * 12;

- final float ret;

+ final float normalizedVal = MathUtils.norm(min, max, val) ;

+ /* final float ret;

if (normalizedVal <= 1f) {

ret = MathUtils.sqrt(normalizedVal) * R;

} else {

ret = A * MathUtils.log(normalizedVal - B) + C;

- }

- return Math.round(MathUtils.lerp(GAMMA_SPACE_MIN, GAMMA_SPACE_MAX, ret));

+ }*/

+ return Math.round(MathUtils.lerp(GAMMA_SPACE_MIN, GAMMA_SPACE_MAX, normalizedVal));

}

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