1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <X11/Xlib.h> 6 7 #include "base/logging.h" 8 #include "gpu/config/gpu_info_collector_linux.h" 9 #include "third_party/libXNVCtrl/NVCtrl.h" 10 #include "third_party/libXNVCtrl/NVCtrlLib.h" 11 #include "ui/gfx/x/x11_types.h" 12 13 namespace gpu { 14 15 // Use NVCtrl extention to query NV driver version. 16 // Return empty string on failing. CollectDriverVersionNVidia()17std::string CollectDriverVersionNVidia() { 18 Display* display = gfx::GetXDisplay(); 19 if (!display) { 20 LOG(ERROR) << "XOpenDisplay failed."; 21 return std::string(); 22 } 23 int event_base = 0, error_base = 0; 24 if (!XNVCTRLQueryExtension(display, &event_base, &error_base)) { 25 VLOG(1) << "NVCtrl extension does not exist."; 26 return std::string(); 27 } 28 int screen_count = ScreenCount(display); 29 for (int screen = 0; screen < screen_count; ++screen) { 30 char* buffer = NULL; 31 if (XNVCTRLIsNvScreen(display, screen) && 32 XNVCTRLQueryStringAttribute(display, screen, 0, 33 NV_CTRL_STRING_NVIDIA_DRIVER_VERSION, 34 &buffer)) { 35 std::string driver_version(buffer); 36 XFree(buffer); 37 return driver_version; 38 } 39 } 40 return std::string(); 41 } 42 43 } // namespace gpu 44