FramebufferManagerBase: Return a std::pair from GetTargetSize

Keeps associated data together. It also eliminates the possibility of out
parameters not being initialized properly. For example, consider the
following example:

-- some FramebufferManager implementation --

void FBMgrImpl::GetTargetSize(u32* width, u32* height) override
{
  // Do nothing
}

-- somewhere else where the function is used --

u32 width, height;
framebuffer_manager_instance->GetTargetSize(&width, &height);

if (texture_width != width) <-- Uninitialized variable usage
{
  ...
}

It makes it much more obvious to spot any initialization issues, because
it requires something to be returned, as opposed to allowing an
implementation to just not do anything.

Source/Core/VideoBackends/D3D/FramebufferManager.cpp

@@ -2,13 +2,15 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include "VideoBackends/D3D/FramebufferManager.h"
+
 #include <memory>
 
+#include "Common/CommonTypes.h"
 #include "Core/HW/Memmap.h"
 #include "VideoBackends/D3D/D3DBase.h"
 #include "VideoBackends/D3D/D3DState.h"
 #include "VideoBackends/D3D/D3DUtil.h"
-#include "VideoBackends/D3D/FramebufferManager.h"
 #include "VideoBackends/D3D/GeometryShaderCache.h"
 #include "VideoBackends/D3D/PixelShaderCache.h"
 #include "VideoBackends/D3D/Render.h"
@@ -292,10 +294,9 @@ std::unique_ptr<XFBSourceBase> FramebufferManager::CreateXFBSource(unsigned int
       layers);
 }
 
-void FramebufferManager::GetTargetSize(unsigned int* width, unsigned int* height)
+std::pair<u32, u32> FramebufferManager::GetTargetSize() const
 {
-  *width = m_target_width;
-  *height = m_target_height;
+  return std::make_pair(m_target_width, m_target_height);
 }
 
 void XFBSource::DecodeToTexture(u32 xfbAddr, u32 fbWidth, u32 fbHeight)

Source/Core/VideoBackends/D3D/FramebufferManager.h

@@ -6,7 +6,9 @@
 
 #include <d3d11.h>
 #include <memory>
+#include <utility>
 
+#include "Common/CommonTypes.h"
 #include "VideoBackends/D3D/D3DTexture.h"
 #include "VideoCommon/FramebufferManagerBase.h"
 
@@ -84,7 +86,7 @@ private:
   std::unique_ptr<XFBSourceBase> CreateXFBSource(unsigned int target_width,
                                                  unsigned int target_height,
                                                  unsigned int layers) override;
-  void GetTargetSize(unsigned int* width, unsigned int* height) override;
+  std::pair<u32, u32> GetTargetSize() const override;
 
   void CopyToRealXFB(u32 xfbAddr, u32 fbStride, u32 fbHeight, const EFBRectangle& sourceRc,
                      float Gamma) override;

Source/Core/VideoBackends/D3D12/FramebufferManager.cpp

@@ -3,7 +3,9 @@
 // Refer to the license.txt file included.
 
 #include "VideoBackends/D3D12/FramebufferManager.h"
+
 #include "Common/Align.h"
+#include "Common/CommonTypes.h"
 #include "Core/HW/Memmap.h"
 #include "VideoBackends/D3D12/D3DBase.h"
 #include "VideoBackends/D3D12/D3DCommandListManager.h"
@@ -218,10 +220,9 @@ std::unique_ptr<XFBSourceBase> FramebufferManager::CreateXFBSource(unsigned int
       layers);
 }
 
-void FramebufferManager::GetTargetSize(unsigned int* width, unsigned int* height)
+std::pair<u32, u32> FramebufferManager::GetTargetSize() const
 {
-  *width = m_target_width;
-  *height = m_target_height;
+  return std::make_pair(m_target_width, m_target_height);
 }
 
 void FramebufferManager::ResolveDepthTexture()

Source/Core/VideoBackends/D3D12/FramebufferManager.h

@@ -4,6 +4,8 @@
 
 #pragma once
 
+#include <utility>
+
 #include "Common/CommonTypes.h"
 #include "VideoBackends/D3D12/D3DTexture.h"
 #include "VideoCommon/FramebufferManagerBase.h"
@@ -86,7 +88,7 @@ private:
   std::unique_ptr<XFBSourceBase> CreateXFBSource(unsigned int target_width,
                                                  unsigned int target_height,
                                                  unsigned int layers) override;
-  void GetTargetSize(unsigned int* width, unsigned int* height) override;
+  std::pair<u32, u32> GetTargetSize() const override;
 
   void CopyToRealXFB(u32 xfbAddr, u32 fbStride, u32 fbHeight, const EFBRectangle& sourceRc,
                      float gamma) override;

Source/Core/VideoBackends/Null/FramebufferManager.h

@@ -4,6 +4,9 @@
 
 #pragma once
 
+#include <utility>
+
+#include "Common/CommonTypes.h"
 #include "VideoCommon/FramebufferManagerBase.h"
 
 class XFBSource : public XFBSourceBase
@@ -23,7 +26,7 @@ public:
     return std::make_unique<XFBSource>();
   }
 
-  void GetTargetSize(unsigned int* width, unsigned int* height) override {}
+  std::pair<u32, u32> GetTargetSize() const override { return std::make_pair(0, 0); }
   void CopyToRealXFB(u32 xfb_addr, u32 fb_stride, u32 fb_height, const EFBRectangle& source_rc,
                      float gamma = 1.0f) override
   {

Source/Core/VideoBackends/OGL/FramebufferManager.cpp

@@ -668,10 +668,9 @@ std::unique_ptr<XFBSourceBase> FramebufferManager::CreateXFBSource(unsigned int
   return std::make_unique<XFBSource>(texture, layers);
 }
 
-void FramebufferManager::GetTargetSize(unsigned int* width, unsigned int* height)
+std::pair<u32, u32> FramebufferManager::GetTargetSize() const
 {
-  *width = m_targetWidth;
-  *height = m_targetHeight;
+  return std::make_pair(m_targetWidth, m_targetHeight);
 }
 
 void FramebufferManager::PokeEFB(EFBAccessType type, const EfbPokeData* points, size_t num_points)

Source/Core/VideoBackends/OGL/FramebufferManager.h

@@ -5,8 +5,10 @@
 #pragma once
 
 #include <memory>
+#include <utility>
 #include <vector>
 
+#include "Common/CommonTypes.h"
 #include "Common/GL/GLUtil.h"
 #include "VideoBackends/OGL/ProgramShaderCache.h"
 #include "VideoBackends/OGL/Render.h"
@@ -103,7 +105,7 @@ private:
   std::unique_ptr<XFBSourceBase> CreateXFBSource(unsigned int target_width,
                                                  unsigned int target_height,
                                                  unsigned int layers) override;
-  void GetTargetSize(unsigned int* width, unsigned int* height) override;
+  std::pair<u32, u32> GetTargetSize() const override;
 
   void CopyToRealXFB(u32 xfbAddr, u32 fbStride, u32 fbHeight, const EFBRectangle& sourceRc,
                      float Gamma) override;

Source/Core/VideoBackends/Software/SWmain.cpp

@@ -4,6 +4,7 @@
 
 #include <memory>
 #include <string>
+#include <utility>
 
 #include "Common/CommonTypes.h"
 
@@ -101,7 +102,8 @@ class FramebufferManager : public FramebufferManagerBase
   {
     return std::make_unique<XFBSource>();
   }
-  void GetTargetSize(unsigned int* width, unsigned int* height) override{};
+
+  std::pair<u32, u32> GetTargetSize() const override { return std::make_pair(0, 0); }
   void CopyToRealXFB(u32 xfbAddr, u32 fbStride, u32 fbHeight, const EFBRectangle& sourceRc,
                      float Gamma = 1.0f) override
   {

Source/Core/VideoBackends/Vulkan/FramebufferManager.cpp

@@ -115,10 +115,9 @@ bool FramebufferManager::Initialize()
   return true;
 }
 
-void FramebufferManager::GetTargetSize(unsigned int* width, unsigned int* height)
+std::pair<u32, u32> FramebufferManager::GetTargetSize() const
 {
-  *width = m_efb_width;
-  *height = m_efb_height;
+  return std::make_pair(m_efb_width, m_efb_height);
 }
 
 bool FramebufferManager::CreateEFBRenderPass()

Source/Core/VideoBackends/Vulkan/FramebufferManager.h

@@ -5,6 +5,7 @@
 #pragma once
 
 #include <memory>
+#include <utility>
 
 #include "Common/CommonTypes.h"
 #include "VideoBackends/Vulkan/Constants.h"
@@ -39,7 +40,7 @@ public:
   Texture2D* GetEFBColorTexture() const { return m_efb_color_texture.get(); }
   Texture2D* GetEFBDepthTexture() const { return m_efb_depth_texture.get(); }
   VkFramebuffer GetEFBFramebuffer() const { return m_efb_framebuffer; }
-  void GetTargetSize(unsigned int* width, unsigned int* height) override;
+  std::pair<u32, u32> GetTargetSize() const override;
 
   std::unique_ptr<XFBSourceBase> CreateXFBSource(unsigned int target_width,
                                                  unsigned int target_height,