GPU: add support for Windows

src/detection/gpu/gpu_windows.cpp

@@ -0,0 +1,44 @@
+extern "C" {
+#include "gpu.h"
+}
+#include "util/windows/wmi.hpp"
+
+extern "C"
+const char* ffDetectGPUImpl(FFlist* gpus, const FFinstance* instance)
+{
+    FF_UNUSED(instance);
+
+    IEnumWbemClassObject* pEnumerator = ffQueryWmi(L"SELECT Name, AdapterCompatibility, DriverVersion FROM Win32_VideoController", nullptr);
+
+    if(!pEnumerator)
+        return "Query WMI service failed";
+
+    IWbemClassObject *pclsObj = NULL;
+    ULONG uReturn = 0;
+
+    while(SUCCEEDED(pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn)) && uReturn != 0)
+    {
+        FFGPUResult* gpu = (FFGPUResult*)ffListAdd(gpus);
+
+        ffStrbufInit(&gpu->vendor);
+        ffGetWmiObjValue(pclsObj, L"AdapterCompatibility", &gpu->vendor);
+        if(ffStrbufStartsWithS(&gpu->vendor, "Intel "))
+        {
+            //Intel returns "Intel Corporation", not sure about AMD
+            ffStrbufSetS(&gpu->vendor, "Intel");
+        }
+
+        ffStrbufInit(&gpu->name);
+        ffGetWmiObjValue(pclsObj, L"Name", &gpu->name);
+
+        ffStrbufInit(&gpu->driver);
+        ffGetWmiObjValue(pclsObj, L"DriverVersion", &gpu->driver);
+
+        gpu->temperature = FF_GPU_TEMP_UNSET;
+        gpu->coreCount = FF_GPU_CORE_COUNT_UNSET;
+    }
+
+    pclsObj->Release();
+    pEnumerator->Release();
+    return nullptr;
+}