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/*
* Copyright (C) 2016 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.
*/
/*
* According to the OMAP color phase correction documentation,
* this happens:
*
* +- -+ +- -+ +- -+
* | Rout | | Rr Rg Rb | | Rin |
* | | 1 | | | |
* | Gout | = --- * | Gr Gg Gb | * | Gin |
* | | 256 | | | |
* | Bout | | Br Bg Bb | | Bin |
* +- -+ +- -+ +- -+
*
* So to get the unmodified color, the values for Rr, Gg and Bb should
* be set to 256, all others to 0. The values are 10 bit signed.
*
* This interface is exposed via sysfs and takes one line in the format:
* Rr Rg Rb Gr Gg Gb Br Bg Bb
*/
package org.cyanogenmod.hardware;
import org.cyanogenmod.internal.util.FileUtils;
public class DisplayColorCalibration {
private static final String COLOR_FILE = "/sys/devices/platform/omapdss/manager0/cpr_coef";
private static final String COLOR_FILE_CTRL = "/sys/devices/platform/omapdss/manager0/cpr_enable";
private static int last_rgb[] = { 256, 256, 256 };
public static boolean isSupported() {
return true;
}
public static int getMaxValue() {
return 256;
}
public static int getMinValue() {
return 0;
}
public static int getDefValue() {
return getMaxValue();
}
public static String getCurColors() {
return last_rgb[0] + " " + last_rgb[1] + " " + last_rgb[2];
}
public static boolean setColors(String colors) {
String rgb[] = colors.split(" ");
String cpr_coefs = rgb[0] + " 0 0 0 " + rgb[1] + " 0 0 0 " + rgb[2];
if (last_rgb[0] == Integer.parseInt(rgb[0]) &&
last_rgb[1] == Integer.parseInt(rgb[1]) &&
last_rgb[2] == Integer.parseInt(rgb[2])) {
return true;
}
if (!FileUtils.writeLine(COLOR_FILE, cpr_coefs)) {
return false;
}
last_rgb[0] = Integer.parseInt(rgb[0]);
last_rgb[1] = Integer.parseInt(rgb[1]);
last_rgb[2] = Integer.parseInt(rgb[2]);
return FileUtils.writeLine(COLOR_FILE_CTRL, "1");
}
}
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