[idd] helper: detect if system has GPU

idd/LGIddHelper/CNotifyWindow.cpp

@@ -20,6 +20,7 @@
 
 #include "CNotifyWindow.h"
 #include "CConfigWindow.h"
+#include "Devices.h"
 #include <CDebug.h>
 #include <windowsx.h>
 #include <strsafe.h>
@@ -161,6 +162,14 @@ void CNotifyWindow::registerIcon()
 
   if (!Shell_NotifyIcon(NIM_SETVERSION, &m_iconData))
     DEBUG_ERROR_HR(GetLastError(), "Shell_NotifyIcon(NIM_SETVERSION)");
+
+  bool hasGPU;
+  if (!checkGPU(hasGPU))
+    DEBUG_ERROR("Failed to check if the system has a GPU");
+  else if (hasGPU)
+    DEBUG_INFO("GPU identified");
+  else
+    DEBUG_INFO("System has no GPU");
 }
 
 HWND CNotifyWindow::hwndDialog()

idd/LGIddHelper/Devices.cpp

@@ -0,0 +1,106 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "Devices.h"
+#include <windows.h>
+#include <devguid.h>
+#include <setupapi.h>
+#include <CDebug.h>
+
+inline static bool wprefix(const wchar_t *pre, const wchar_t *str)
+{
+  return wcsncmp(pre, str, wcslen(pre)) == 0;
+}
+
+bool checkGPU(bool &found)
+{
+  found = false;
+
+  HDEVINFO hDevInfo = SetupDiGetClassDevsW(&GUID_DEVCLASS_DISPLAY, NULL, NULL, DIGCF_PRESENT);
+  if (hDevInfo == INVALID_HANDLE_VALUE)
+  {
+    DEBUG_WARN_HR(GetLastError(), L"SetupDiGetClassDevsW");
+    return false;
+  }
+
+  SP_DEVINFO_DATA devInfo = { 0 };
+  devInfo.cbSize = sizeof devInfo;
+
+  for (DWORD dwIndex = 0; SetupDiEnumDeviceInfo(hDevInfo, dwIndex, &devInfo); ++dwIndex)
+  {
+    DWORD dwSizeRequired;
+    DWORD dwPropertyType;
+    SetupDiGetDeviceRegistryPropertyW(hDevInfo, &devInfo, SPDRP_HARDWAREID, &dwPropertyType, NULL, 0, &dwSizeRequired);
+
+    DWORD dwLastError = GetLastError();
+    if (dwLastError == ERROR_INVALID_DATA)
+      continue;
+    else if (dwLastError != ERROR_INSUFFICIENT_BUFFER)
+    {
+      DEBUG_WARN_HR(GetLastError(), L"SetupDiGetDeviceRegistryPropertyW(SPDRP_HARDWAREID) size calculation");
+      goto fail;
+    }
+
+    if (dwPropertyType != REG_MULTI_SZ)
+    {
+      DEBUG_WARN(L"SetupDiGetDeviceRegistryPropertyW(SPDRP_HARDWAREID) returned wrong type");
+      goto fail;
+    }
+
+    LPWSTR lpBuffer = (LPWSTR)malloc(dwSizeRequired);
+    if (!lpBuffer)
+    {
+      DEBUG_WARN(L"failed to allocate memory for SetupDiGetDeviceRegistryPropertyW(SPDRP_HARDWAREID)");
+      goto fail;
+    }
+
+    if (!SetupDiGetDeviceRegistryPropertyW(hDevInfo, &devInfo, SPDRP_HARDWAREID, &dwPropertyType, (PBYTE)lpBuffer, dwSizeRequired, NULL))
+    {
+      DEBUG_WARN_HR(GetLastError(), L"SetupDiGetDeviceRegistryPropertyW(SPDRP_HARDWAREID) for real");
+      free(lpBuffer);
+      goto fail;
+    }
+
+    for (LPWSTR lpHwId = lpBuffer; *lpHwId; lpHwId += wcslen(lpBuffer) + 1)
+    {
+      if (
+        wprefix(L"PCI\\VEN_10DE&", lpHwId) || // Nvidia
+        wprefix(L"PCI\\VEN_1002&", lpHwId) || // AMD
+        wprefix(L"PCI\\VEN_8086&", lpHwId)    // Intel
+      )
+      {
+        found = true;
+        break;
+      }
+    }
+
+    free(lpBuffer);
+
+    if (found)
+      break;
+  }
+
+  SetupDiDestroyDeviceInfoList(hDevInfo);
+  return true;
+
+fail:
+  SetupDiDestroyDeviceInfoList(hDevInfo);
+  return false;
+}

idd/LGIddHelper/Devices.h

@@ -0,0 +1,23 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#pragma once
+
+bool checkGPU(bool &found);

idd/LGIddHelper/LGIddHelper.vcxproj

@@ -190,6 +190,7 @@ copy /Y "$(ProjectDir)VERSION" "$(SolutionDir)$(Platform)\$(Configuration)\LGIdd
     <ClCompile Include="CStaticWidget.cpp" />
     <ClCompile Include="CWidget.cpp" />
     <ClCompile Include="CWindow.cpp" />
+    <ClCompile Include="Devices.cpp" />
     <ClCompile Include="main.cpp" />
     <ClCompile Include="UIHelpers.cpp" />
   </ItemGroup>
@@ -205,6 +206,7 @@ copy /Y "$(ProjectDir)VERSION" "$(SolutionDir)$(Platform)\$(Configuration)\LGIdd
     <ClInclude Include="CRegistrySettings.h" />
     <ClInclude Include="CStaticWidget.h" />
     <ClInclude Include="CWidget.h" />
+    <ClInclude Include="Devices.h" />
     <ClInclude Include="UIHelpers.h" />
     <ClInclude Include="CWindow.h" />
   </ItemGroup>

idd/LGIddHelper/LGIddHelper.vcxproj.filters

@@ -53,6 +53,16 @@
     <ClCompile Include="CGroupBox.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)LGCommon\*.cpp" />
+    <ClCompile Include="CButton.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="CEditWidget.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="Devices.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <CLInclude Include="$(SolutionDir)LGCommon\*.h" />
@@ -94,6 +104,18 @@
     <ClInclude Include="CGroupBox.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <CLInclude Include="$(SolutionDir)LGCommon\*.h" />
+    <CLInclude Include="$(SolutionDir)LGCommon\*.h" />
+    <CLInclude Include="$(SolutionDir)LGCommon\*.h" />
+    <ClInclude Include="CButton.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="CEditWidget.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="Devices.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />