Merge branch 'master' into stable

1 files changed, 83 insertions, 0 deletions

diff --git a/Source/Core/VideoCommon/VideoBackendBase.cpp b/Source/Core/VideoCommon/VideoBackendBase.cpp
new file mode 100644
index 0000000000..c0e466cb5c
--- /dev/null
+++ b/Source/Core/VideoCommon/VideoBackendBase.cpp
@@ -0,0 +1,83 @@
+// 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;
+}