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// Copyright 2011 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <algorithm>
#include <memory>
#include <string>
#include <vector>
// TODO: ugly
#ifdef _WIN32
#include "VideoBackends/D3D/VideoBackend.h"
#include "VideoBackends/D3D12/VideoBackend.h"
#endif
#include "VideoBackends/OGL/VideoBackend.h"
#include "VideoBackends/Software/VideoBackend.h"
#include "VideoCommon/VideoBackendBase.h"
std::vector<std::unique_ptr<VideoBackendBase>> g_available_video_backends;
VideoBackendBase* g_video_backend = nullptr;
static VideoBackendBase* s_default_backend = nullptr;
#ifdef _WIN32
#include <windows.h>
// 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 VideoBackendBase::PopulateList()
{
// OGL > D3D11 > D3D12 > SW
g_available_video_backends.push_back(std::make_unique<OGL::VideoBackend>());
#ifdef _WIN32
g_available_video_backends.push_back(std::make_unique<DX11::VideoBackend>());
// More robust way to check for D3D12 support than (unreliable) OS version checks.
HMODULE d3d12_module = LoadLibraryA("d3d12.dll");
if (d3d12_module != nullptr)
{
FreeLibrary(d3d12_module);
g_available_video_backends.push_back(std::make_unique<DX12::VideoBackend>());
}
#endif
g_available_video_backends.push_back(std::make_unique<SW::VideoSoftware>());
const auto iter = std::find_if(g_available_video_backends.begin(), g_available_video_backends.end(), [](const auto& backend) {
return backend != nullptr;
});
if (iter == g_available_video_backends.end())
return;
s_default_backend = iter->get();
g_video_backend = iter->get();
}
void VideoBackendBase::ClearList()
{
g_available_video_backends.clear();
}
void VideoBackendBase::ActivateBackend(const std::string& name)
{
// If empty, set it to the default backend (expected behavior)
if (name.empty())
g_video_backend = s_default_backend;
const auto iter = std::find_if(g_available_video_backends.begin(), g_available_video_backends.end(), [&name](const auto& backend) {
return name == backend->GetName();
});
if (iter == g_available_video_backends.end())
return;
g_video_backend = iter->get();
}
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