The Tor Browser: widget/windows/winrt/MetroD3DCheckHelper.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #pragma once

     8 /* this file is included by exe stubs, don't pull xpcom into it. */

    10 #include <d3d10_1.h>

    11 #include <dxgi.h>

    12 #include <d3d10misc.h>

    14 /*

    15  * Checks to see if the d3d implementation supports feature level 9.3 or

    16  * above. Metrofx can't run on systems that fail this check.

    17  *

    18  * Note, this can hit perf, don't call this unless you absolutely have to.

    19  * Both the ceh and winrt widget code save a cached result in the registry.

    20  */

    21 static bool D3DFeatureLevelCheck()

    22 {

    23   HMODULE dxgiModule = LoadLibraryA("dxgi.dll");

    24   if (!dxgiModule) {

    25     return false;

    26   }

    27   decltype(CreateDXGIFactory1)* createDXGIFactory1 =

    28     (decltype(CreateDXGIFactory1)*) GetProcAddress(dxgiModule, "CreateDXGIFactory1");

    29   if (!createDXGIFactory1) {

    30     FreeLibrary(dxgiModule);

    31     return false;

    32   }

    34   HMODULE d3d10module = LoadLibraryA("d3d10_1.dll");

    35   if (!d3d10module) {

    36     FreeLibrary(dxgiModule);

    37     return false;

    38   }

    39   decltype(D3D10CreateDevice1)* createD3DDevice =

    40     (decltype(D3D10CreateDevice1)*) GetProcAddress(d3d10module,

    41                                                    "D3D10CreateDevice1");

    42   if (!createD3DDevice) {

    43     FreeLibrary(d3d10module);

    44     FreeLibrary(dxgiModule);

    45     return false;

    46   }

    48   IDXGIFactory1* factory1;

    49   if (FAILED(createDXGIFactory1(__uuidof(IDXGIFactory1), (void**)&factory1))) {

    50     FreeLibrary(d3d10module);

    51     FreeLibrary(dxgiModule);

    52     return false;

    53   }

    55   IDXGIAdapter1* adapter1;

    56   if (FAILED(factory1->EnumAdapters1(0, &adapter1))) {

    57     factory1->Release();

    58     FreeLibrary(d3d10module);

    59     FreeLibrary(dxgiModule);

    60     return false;

    61   }

    63   // Try for DX10.1

    64   ID3D10Device1* device;

    65   if (FAILED(createD3DDevice(adapter1, D3D10_DRIVER_TYPE_HARDWARE, nullptr,

    66                              D3D10_CREATE_DEVICE_BGRA_SUPPORT |

    67                              D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,

    68                              D3D10_FEATURE_LEVEL_10_1,

    69                              D3D10_1_SDK_VERSION, &device))) {

    70     // Try for DX10

    71     if (FAILED(createD3DDevice(adapter1, D3D10_DRIVER_TYPE_HARDWARE, nullptr,

    72                                D3D10_CREATE_DEVICE_BGRA_SUPPORT |

    73                                D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,

    74                                D3D10_FEATURE_LEVEL_10_0,

    75                                D3D10_1_SDK_VERSION, &device))) {

    76       // Try for DX9.3 (we fall back to cairo and cairo has support for D3D 9.3)

    77       if (FAILED(createD3DDevice(adapter1, D3D10_DRIVER_TYPE_HARDWARE, nullptr,

    78                                  D3D10_CREATE_DEVICE_BGRA_SUPPORT |

    79                                  D3D10_CREATE_DEVICE_PREVENT_INTERNAL_THREADING_OPTIMIZATIONS,

    80                                  D3D10_FEATURE_LEVEL_9_3,

    81                                  D3D10_1_SDK_VERSION, &device))) {

    82         adapter1->Release();

    83         factory1->Release();

    84         FreeLibrary(d3d10module);

    85         FreeLibrary(dxgiModule);

    86         return false;

    87       }

    88     }

    89   }

    90   device->Release();

    91   adapter1->Release();

    92   factory1->Release();

    93   FreeLibrary(d3d10module);

    94   FreeLibrary(dxgiModule);

    95   return true;

    96 }

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