Revert "Revert "write a log file about OpenGL driver""

This reverts commit 2ebca292.

The build breakage in gengal was caused by the global variable
aCacheFolder, which is initialized by a call to
rtl::Bootstrap::expandMacros(), which initializes the global
FundamentalIni object before tools::extendApplicationEnvironment() gets
a chance to set URE_BOOTSTRAP, so FundamentalIni is empty.

Change-Id: I10d8652dab15ee6924ff4ceff17000963975e30f
Reviewed-on: https://gerrit.libreoffice.org/20232Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

vcl/opengl/win/WinDeviceInfo.cxx

@@ -532,6 +532,28 @@ bool WinOpenGLDeviceInfo::FindBlocklistedDeviceInList()
     return match;
 }
 
+namespace {
+
+OUString getCacheFolder()
+{
+    OUString url("${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("bootstrap") ":UserInstallation}/cache/");
+    rtl::Bootstrap::expandMacros(url);
+
+    osl::Directory::create(url);
+
+    return url;
+}
+
+void writeToLog(SvStream& rStrm, const char* pKey, const OUString rVal)
+{
+    rStrm.WriteCharPtr(pKey);
+    rStrm.WriteCharPtr(": ");
+    rStrm.WriteOString(OUStringToOString(rVal, RTL_TEXTENCODING_UTF8));
+    rStrm.WriteChar('\n');
+}
+
+}
+
 bool WinOpenGLDeviceInfo::isDeviceBlocked()
 {
     SAL_INFO("vcl.opengl", maDriverVersion);
@@ -543,6 +565,20 @@ bool WinOpenGLDeviceInfo::isDeviceBlocked()
     SAL_INFO("vcl.opengl", maDeviceKey);
     SAL_INFO("vcl.opengl", maDeviceString);
 
+    OUString aCacheFolder = getCacheFolder();
+
+    OUString aCacheFile(aCacheFolder + "/opengl_device.log");
+    SvFileStream aOpenGLLogFile(aCacheFile, StreamMode::WRITE);
+
+    writeToLog(aOpenGLLogFile, "DriverVersion", maDriverVersion);
+    writeToLog(aOpenGLLogFile, "DriverDate", maDriverDate);
+    writeToLog(aOpenGLLogFile, "DeviceID", maDeviceID);
+    writeToLog(aOpenGLLogFile, "AdapterVendorID", maAdapterVendorID);
+    writeToLog(aOpenGLLogFile, "AdapterDeviceID", maAdapterDeviceID);
+    writeToLog(aOpenGLLogFile, "AdapterSubsysID", maAdapterSubsysID);
+    writeToLog(aOpenGLLogFile, "DeviceKey", maDeviceKey);
+    writeToLog(aOpenGLLogFile, "DeviceString", maDeviceString);
+
     // Check if the device is blocked from the downloaded blocklist. If not, check
     // the static list after that. This order is used so that we can later escape
     // out of static blocks (i.e. if we were wrong or something was patched, we