treewide: convert GPLv2+ license info to SPDX tags

SPDX standardizes how source code conveys its copyright and licensing
information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX
tags are adopted in many large projects, including things like the Linux
kernel.

Source/Core/VideoBackends/D3D/D3DBase.cpp

@@ -1,6 +1,5 @@
 // Copyright 2010 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "VideoBackends/D3D/D3DBase.h"
 

Source/Core/VideoBackends/D3D/D3DBase.h

@@ -1,6 +1,5 @@
 // Copyright 2010 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/Core/VideoBackends/D3D/D3DBoundingBox.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <algorithm>
 #include <array>

Source/Core/VideoBackends/D3D/D3DBoundingBox.h

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 #include "VideoBackends/D3D/D3DBase.h"

Source/Core/VideoBackends/D3D/D3DMain.cpp

@@ -1,6 +1,5 @@
 // Copyright 2008 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <memory>
 #include <string>

Source/Core/VideoBackends/D3D/D3DNativeVertexFormat.cpp

@@ -1,6 +1,5 @@
 // Copyright 2010 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <array>
 

Source/Core/VideoBackends/D3D/D3DPerfQuery.cpp

@@ -1,6 +1,5 @@
 // Copyright 2012 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "VideoBackends/D3D/D3DPerfQuery.h"
 

Source/Core/VideoBackends/D3D/D3DPerfQuery.h

@@ -1,6 +1,5 @@
 // Copyright 2012 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/Core/VideoBackends/D3D/D3DRender.cpp

@@ -1,6 +1,5 @@
 // Copyright 2010 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "VideoBackends/D3D/D3DRender.h"
 

Source/Core/VideoBackends/D3D/D3DRender.h

@@ -1,6 +1,5 @@
 // Copyright 2010 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/Core/VideoBackends/D3D/D3DState.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <algorithm>
 #include <array>

Source/Core/VideoBackends/D3D/D3DState.h

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/Core/VideoBackends/D3D/D3DSwapChain.cpp

@@ -1,6 +1,5 @@
 // Copyright 2019 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "VideoBackends/D3D/D3DSwapChain.h"
 #include "VideoBackends/D3D/DXTexture.h"

Source/Core/VideoBackends/D3D/D3DSwapChain.h

@@ -1,6 +1,5 @@
 // Copyright 2019 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/Core/VideoBackends/D3D/D3DVertexManager.cpp

@@ -1,6 +1,5 @@
 // Copyright 2010 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "VideoBackends/D3D/D3DVertexManager.h"
 

Source/Core/VideoBackends/D3D/D3DVertexManager.h

@@ -1,6 +1,5 @@
 // Copyright 2008 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/Core/VideoBackends/D3D/DXPipeline.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "Common/Assert.h"
 #include "Common/Logging/Log.h"

Source/Core/VideoBackends/D3D/DXPipeline.h

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/Core/VideoBackends/D3D/DXShader.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "VideoBackends/D3D/DXShader.h"
 #include "Common/Assert.h"

Source/Core/VideoBackends/D3D/DXShader.h

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 #include <memory>

Source/Core/VideoBackends/D3D/DXTexture.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <algorithm>
 #include <cstddef>

Source/Core/VideoBackends/D3D/DXTexture.h

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/Core/VideoBackends/D3D/VideoBackend.h

@@ -1,6 +1,5 @@
 // Copyright 2011 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once