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