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cmhw: using common display calibration

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This commit Fix Live Display and Color Calibration under display settings
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Simone Esposito 2018-05-25 22:01:52 +02:00 committed by GitHub
parent f105ad83f2
commit 86861b696b
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cmhw/org/lineageos/hardware/DisplayColorCalibration.java
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/*
* Copyright (C) 2014 The CyanogenMod Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.lineageos.hardware;
import org.lineageos.internal.util.FileUtils;
/*
* Display RGB intensity calibration (kcal)
*
* Exports methods to get the valid value boundaries, the
* current color values, and a method to set new ones.
*
* Values exported by min/max can be the direct values required
* by the hardware, or a local (to DisplayColorCalibration) abstraction
* that's internally converted to something else prior to actual use. The
* Settings user interface will normalize these into a 0-100 (percentage)
* scale before showing them to the user, but all values passed to/from
* the client (Settings) are in this class' scale.
*/
public class DisplayColorCalibration {
private static final String COLOR_FILE = "/sys/class/graphics/fb0/kcal";
/*
* All HAF classes should export this boolean.
* Real implementations must, of course, return true
*/
public static boolean isSupported() {
return FileUtils.isFileWritable(COLOR_FILE);
}
/*
* What's the maximum integer value we take for a color
*/
public static int getMaxValue() {
return 255;
}
/*
* What's the minimum integer value we take for a color
*/
public static int getMinValue() {
return 0;
}
/*
* What's the default integer value we take for a color
*/
public static int getDefValue() {
return getMaxValue();
}
/*
* What's the current RGB triplet?
* This should return a space-separated set of integers in
* a string, same format as the input to setColors()
*/
public static String getCurColors() {
return FileUtils.readOneLine(COLOR_FILE);
}
/*
* Set the RGB values to the given input triplet. Input is
* expected to consist of 3 values, space-separated, each to
* be a value between the boundaries set by get(Max|Min)Value
* (see below), and it's meant to be locally interpreted/used.
*/
public static boolean setColors(String colors) {
if (!FileUtils.writeLine(COLOR_FILE, colors)) {
return false;
}
return true;
}
}