forked from dolphin-emu/dolphin
84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
// Copyright 2011 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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// TODO: ugly
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#ifdef _WIN32
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#include "VideoBackends/D3D/VideoBackend.h"
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#endif
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#include "VideoBackends/OGL/VideoBackend.h"
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#include "VideoBackends/Software/VideoBackend.h"
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#include "VideoCommon/VideoBackendBase.h"
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std::vector<VideoBackend*> g_available_video_backends;
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VideoBackend* g_video_backend = nullptr;
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static VideoBackend* s_default_backend = nullptr;
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#ifdef _WIN32
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#include <windows.h>
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// http://msdn.microsoft.com/en-us/library/ms725491.aspx
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static bool IsGteVista()
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{
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OSVERSIONINFOEX osvi;
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DWORDLONG dwlConditionMask = 0;
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ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
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osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
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osvi.dwMajorVersion = 6;
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VER_SET_CONDITION(dwlConditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);
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return VerifyVersionInfo(&osvi, VER_MAJORVERSION, dwlConditionMask) != FALSE;
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}
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// Nvidia drivers >= v302 will check if the application exports a global
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// variable named NvOptimusEnablement to know if it should run the app in high
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// performance graphics mode or using the IGP.
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extern "C" {
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__declspec(dllexport) DWORD NvOptimusEnablement = 1;
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}
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#endif
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void VideoBackend::PopulateList()
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{
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VideoBackend* backends[4] = { nullptr };
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// OGL > D3D11 > SW
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g_available_video_backends.push_back(backends[0] = new OGL::VideoBackend);
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#ifdef _WIN32
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if (IsGteVista())
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g_available_video_backends.push_back(backends[1] = new DX11::VideoBackend);
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#endif
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g_available_video_backends.push_back(backends[3] = new SW::VideoSoftware);
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for (VideoBackend* backend : backends)
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{
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if (backend)
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{
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s_default_backend = g_video_backend = backend;
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break;
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}
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}
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}
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void VideoBackend::ClearList()
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{
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while (!g_available_video_backends.empty())
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{
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delete g_available_video_backends.back();
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g_available_video_backends.pop_back();
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}
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}
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void VideoBackend::ActivateBackend(const std::string& name)
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{
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if (name.length() == 0) // If nullptr, set it to the default backend (expected behavior)
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g_video_backend = s_default_backend;
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for (VideoBackend* backend : g_available_video_backends)
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if (name == backend->GetName())
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g_video_backend = backend;
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}
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