mirror of
https://github.com/gnif/LookingGlass.git
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121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2025 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "common/display.h"
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#include "common/debug.h"
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bool display_getPathInfo(HMONITOR monitor, DISPLAYCONFIG_PATH_INFO * info)
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{
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bool result = false;
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UINT32 numPath, numMode;
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MONITORINFOEXW viewInfo = { .cbSize = sizeof(viewInfo) };
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if (!GetMonitorInfoW(monitor, (MONITORINFO*)&viewInfo))
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{
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DEBUG_ERROR("Failed to get the monitor info");
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goto err;
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}
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err_retry:
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if (FAILED(GetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, &numPath, &numMode)))
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goto err;
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DISPLAYCONFIG_PATH_INFO * pathInfo = calloc(sizeof(*pathInfo), numPath);
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if (!pathInfo)
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goto err_mem_pathInfo;
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DISPLAYCONFIG_MODE_INFO * modeInfo = calloc(sizeof(*modeInfo), numMode);
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if (!modeInfo)
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goto err_mem_modeInfo;
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LONG status = QueryDisplayConfig(QDC_ONLY_ACTIVE_PATHS,
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&numPath, pathInfo,
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&numMode, modeInfo,
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NULL);
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if (status != ERROR_SUCCESS)
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{
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if (status == ERROR_INSUFFICIENT_BUFFER)
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{
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free(modeInfo);
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free(pathInfo);
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goto err_retry;
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}
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DEBUG_ERROR("QueryDisplayConfig failed with 0x%lx", status);
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goto err_queryDisplay;
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}
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for(unsigned i = 0; i < numPath; ++i)
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{
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DISPLAYCONFIG_SOURCE_DEVICE_NAME sourceName =
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{
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.header =
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{
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.type = DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME,
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.size = sizeof(sourceName),
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.adapterId = pathInfo[i].sourceInfo.adapterId,
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.id = pathInfo[i].sourceInfo.id,
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}
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};
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if (FAILED(DisplayConfigGetDeviceInfo(&sourceName.header)))
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continue;
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if (wcscmp(viewInfo.szDevice, sourceName.viewGdiDeviceName) != 0)
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continue;
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*info = pathInfo[i];
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result = true;
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break;
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}
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err_queryDisplay:
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free(modeInfo);
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err_mem_modeInfo:
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free(pathInfo);
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err_mem_pathInfo:
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err:
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return result;
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}
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float display_getSDRWhiteLevel(const DISPLAYCONFIG_PATH_INFO * displayPathInfo)
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{
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float nits = 80.0f;
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DISPLAYCONFIG_SDR_WHITE_LEVEL level =
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{
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.header =
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{
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.type = DISPLAYCONFIG_DEVICE_INFO_GET_SDR_WHITE_LEVEL,
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.size = sizeof(level),
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.adapterId = displayPathInfo->targetInfo.adapterId,
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.id = displayPathInfo->targetInfo.id,
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}
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};
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if (SUCCEEDED(DisplayConfigGetDeviceInfo(&level.header)))
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nits = level.SDRWhiteLevel / 1000.0f * 80.0f;
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return nits;
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}
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