File indexing completed on 2024-05-12 05:38:44 

0001 /*  This file is part of the KDE project
0002  *    SPDX-FileCopyrightText: 2023 Quang Ngô <ngoquang2708@gmail.com>
0003  *
0004  *    SPDX-License-Identifier: LGPL-2.0-only
0005  *
0006  */
0007 
0008 #include "ddcutildisplay.h"
0009 
0010 #define BRIGHTNESS_VCP_FEATURE_CODE 0x10
0011 
0012 #ifdef WITH_DDCUTIL
0013 DDCutilDisplay::DDCutilDisplay(DDCA_Display_Info displayInfo, DDCA_Display_Handle displayHandle)
0014     : m_displayInfo(displayInfo)
0015     , m_displayHandle(displayHandle)
0016     , m_brightness(-1)
0017     , m_maxBrightness(-1)
0018     , m_supportsBrightness(false)
0019 {
0020     Q_ASSERT(displayHandle);
0021 
0022     DDCA_Non_Table_Vcp_Value value;
0023 
0024     if (ddca_get_non_table_vcp_value(m_displayHandle, BRIGHTNESS_VCP_FEATURE_CODE, &value) == DDCRC_OK) {
0025         m_brightness = value.sh << 8 | value.sl;
0026         m_maxBrightness = value.mh << 8 | value.ml;
0027         m_supportsBrightness = true;
0028     }
0029 }
0030 #endif
0031 
0032 DDCutilDisplay::~DDCutilDisplay()
0033 {
0034 #ifdef WITH_DDCUTIL
0035     ddca_close_display(m_displayHandle);
0036 #endif
0037 }
0038 
0039 QString DDCutilDisplay::label() const
0040 {
0041 #ifdef WITH_DDCUTIL
0042     return m_displayInfo.model_name;
0043 #else
0044     return QString();
0045 #endif
0046 }
0047 
0048 int DDCutilDisplay::brightness()
0049 {
0050     QReadLocker lock(&m_lock);
0051 
0052     return m_brightness;
0053 }
0054 
0055 int DDCutilDisplay::maxBrightness()
0056 {
0057     QReadLocker lock(&m_lock);
0058 
0059     return m_maxBrightness;
0060 }
0061 
0062 void DDCutilDisplay::setBrightness(int value)
0063 {
0064     QWriteLocker lock(&m_lock);
0065 
0066 #ifdef WITH_DDCUTIL
0067     uint8_t sh = value >> 8 & 0xff;
0068     uint8_t sl = value & 0xff;
0069 
0070     if (ddca_set_non_table_vcp_value(m_displayHandle, BRIGHTNESS_VCP_FEATURE_CODE, sh, sl) == DDCRC_OK) {
0071         m_brightness = value;
0072     }
0073 #endif
0074 }
0075 
0076 bool DDCutilDisplay::supportsBrightness() const
0077 {
0078     return m_supportsBrightness;
0079 }
0080 
0081 #include "moc_ddcutildisplay.cpp"