From 72e9a5081e40600b857d357c8111e344e68aa22f Mon Sep 17 00:00:00 2001
From: Derek Lesho <dlesho@codeweavers.com>
Date: Fri, 10 Jan 2020 15:34:45 -0600
Subject: [PATCH] user32: Implement QueryDisplayConfig

---
 dlls/user32/sysparams.c | 89 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 74 insertions(+), 15 deletions(-)

diff --git a/dlls/user32/sysparams.c b/dlls/user32/sysparams.c
index a29d17d72ce..84aed3dedb4 100644
--- a/dlls/user32/sysparams.c
+++ b/dlls/user32/sysparams.c
@@ -4757,26 +4757,85 @@ LONG WINAPI QueryDisplayConfig(UINT32 flags, UINT32 *numpathelements, DISPLAYCON
     LUID gpu_luid;
     WCHAR device_name[CCHDEVICENAME];
     DEVMODEW devmode;
+    POINT origin;
+    HMONITOR monitor;
+    MONITORINFOEXW monitor_info;
+    DISPLAYCONFIG_SOURCE_MODE *source_mode = &modeinfo[0].DUMMYUNIONNAME.sourceMode;
+    DISPLAYCONFIG_TARGET_MODE *target_mode = &modeinfo[1].DUMMYUNIONNAME.targetMode;
+    DISPLAYCONFIG_PATH_SOURCE_INFO *source_info = &pathinfo[0].sourceInfo;
+    DISPLAYCONFIG_PATH_TARGET_INFO *target_info = &pathinfo[0].targetInfo;
 
-    FIXME("(%08x %p %p %p %p %p): semi-stub\n", flags, numpathelements, pathinfo, numinfoelements, modeinfo, topologyid);
+    TRACE("(%08x %p %p %p %p %p)\n", flags, numpathelements, pathinfo, numinfoelements, modeinfo, topologyid);
 
-    if (!numpathelements || !numinfoelements)
-        return ERROR_INVALID_PARAMETER;
+    if (*numpathelements < 1 || *numinfoelements < 2)
+        return ERROR_INSUFFICIENT_BUFFER;
 
-    if (!*numpathelements || !*numinfoelements)
-        return ERROR_INVALID_PARAMETER;
-
-    if (flags != QDC_ALL_PATHS &&
-        flags != QDC_ONLY_ACTIVE_PATHS &&
-        flags != QDC_DATABASE_CURRENT)
-        return ERROR_INVALID_PARAMETER;
+    origin.x = 0;
+    origin.y = 0;
+    monitor = MonitorFromPoint(origin, MONITOR_DEFAULTTOPRIMARY);
+    monitor_info.cbSize = sizeof(monitor_info);
+    if (!(GetMonitorInfoW(monitor, (MONITORINFO*) &monitor_info)))
+    {
+        return ERROR_GEN_FAILURE;
+    }
+    if (!(EnumDisplaySettingsW(monitor_info.szDevice, 0, &devmode)))
+    {
+        return ERROR_GEN_FAILURE;
+    }
 
-    if (((flags == QDC_DATABASE_CURRENT) && !topologyid) ||
-        ((flags != QDC_DATABASE_CURRENT) && topologyid))
-        return ERROR_INVALID_PARAMETER;
+    AllocateLocallyUniqueId(&gpu_luid);
+
+    source_mode->width = devmode.dmPelsWidth;
+    source_mode->height = devmode.dmPelsHeight;
+    source_mode->pixelFormat = DISPLAYCONFIG_PIXELFORMAT_32BPP;
+    source_mode->position.x = 0;
+    source_mode->position.y = 0;
+
+    /* no idea what pixel rate is */
+    target_mode->targetVideoSignalInfo.pixelRate = 0xdeadbeef;
+    target_mode->targetVideoSignalInfo.hSyncFreq.Numerator = devmode.dmDisplayFrequency * devmode.dmPelsHeight;
+    target_mode->targetVideoSignalInfo.hSyncFreq.Denominator = 1;
+    target_mode->targetVideoSignalInfo.vSyncFreq.Numerator = devmode.dmDisplayFrequency;
+    target_mode->targetVideoSignalInfo.vSyncFreq.Denominator = 1;
+    target_mode->targetVideoSignalInfo.activeSize.cx = devmode.dmPelsWidth;
+    target_mode->targetVideoSignalInfo.activeSize.cy = devmode.dmPelsHeight;
+    target_mode->targetVideoSignalInfo.totalSize.cx = devmode.dmPelsWidth;
+    target_mode->targetVideoSignalInfo.totalSize.cy = devmode.dmPelsHeight;
+    target_mode->targetVideoSignalInfo.DUMMYUNIONNAME.videoStandard = D3DKMDT_VSS_NTSC_M;
+    target_mode->targetVideoSignalInfo.scanLineOrdering = DISPLAYCONFIG_SCANLINE_ORDERING_UNSPECIFIED;
+
+    modeinfo[0].infoType = DISPLAYCONFIG_MODE_INFO_TYPE_SOURCE;
+    modeinfo[0].id = 0;
+    modeinfo[0].adapterId = gpu_luid;
+    modeinfo[1].infoType = DISPLAYCONFIG_MODE_INFO_TYPE_TARGET;
+    modeinfo[1].id = 0;
+    modeinfo[1].adapterId = gpu_luid;
+
+    source_info->adapterId = gpu_luid;
+    source_info->id = 0;
+    source_info->DUMMYUNIONNAME.modeInfoIdx = 0;
+    source_info->statusFlags = DISPLAYCONFIG_SOURCE_IN_USE;
+
+    target_info->adapterId = gpu_luid;
+    target_info->id = 0;
+
+    target_info->DUMMYUNIONNAME.modeInfoIdx = 1;
+    target_info->outputTechnology = DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HDMI;
+    target_info->rotation = DISPLAYCONFIG_ROTATION_IDENTITY;
+    target_info->scaling = DISPLAYCONFIG_SCALING_IDENTITY;
+    target_info->refreshRate.Numerator = devmode.dmDisplayFrequency;
+    target_info->refreshRate.Denominator = 1;
+    target_info->scanLineOrdering = DISPLAYCONFIG_SCANLINE_ORDERING_UNSPECIFIED;
+    target_info->targetAvailable = TRUE;
+    target_info->statusFlags = DISPLAYCONFIG_TARGET_IN_USE;
+
+    pathinfo[0].flags = DISPLAYCONFIG_PATH_ACTIVE;
+
+    if (flags == QDC_DATABASE_CURRENT && topologyid)
+    {
+        *topologyid = DISPLAYCONFIG_TOPOLOGY_INTERNAL;
+    }
 
-    if (flags != QDC_ONLY_ACTIVE_PATHS)
-        FIXME("only returning active paths\n");
 
     if (topologyid)
     {
-- 
2.27.0