From fb4ff3e51b2c41f9fc44116916fc2deb1cfa366a Mon Sep 17 00:00:00 2001
From: Elyas Hue <elyas.hue@telecom-paris.fr>
Date: Tue, 14 Apr 2026 10:07:16 +0200
Subject: VideoCommon: Added an option to showcase internal resolution, EFB
 width x height as screen overlay. Option to turn it on is a checkbox in
 screen on the OSD settings, in debug. This supports enhancements.

---
 Source/Core/VideoCommon/PerformanceMetrics.cpp | 37 ++++++++++++++++++++++++++
 Source/Core/VideoCommon/PerformanceMetrics.h   |  3 ++-
 Source/Core/VideoCommon/VideoConfig.cpp        |  1 +
 Source/Core/VideoCommon/VideoConfig.h          |  1 +
 4 files changed, 41 insertions(+), 1 deletion(-)

(limited to 'Source/Core/VideoCommon')

diff --git a/Source/Core/VideoCommon/PerformanceMetrics.cpp b/Source/Core/VideoCommon/PerformanceMetrics.cpp
index 9676eb3b33..fccc8ae38e 100644
--- a/Source/Core/VideoCommon/PerformanceMetrics.cpp
+++ b/Source/Core/VideoCommon/PerformanceMetrics.cpp
@@ -11,6 +11,7 @@
 #include "Common/HookableEvent.h"
 #include "Core/Config/GraphicsSettings.h"
 #include "Core/Core.h"
+#include "VideoCommon/FramebufferManager.h"
 #include "VideoCommon/VideoConfig.h"
 
 PerformanceMetrics::PerformanceMetrics()
@@ -88,6 +89,20 @@ double PerformanceMetrics::GetFPS() const
   return m_fps_counter.GetHzAvg();
 }
 
+u32 PerformanceMetrics::GetEFBWidth() const
+{
+  if (g_framebuffer_manager)
+    return g_framebuffer_manager->GetEFBWidth();
+  return 0;
+}
+
+u32 PerformanceMetrics::GetEFBHeight() const
+{
+  if (g_framebuffer_manager)
+    return g_framebuffer_manager->GetEFBHeight();
+  return 0;
+}
+
 double PerformanceMetrics::GetVPS() const
 {
   return m_vps_counter.GetHzAvg();
@@ -124,6 +139,8 @@ void PerformanceMetrics::DrawImGuiStats(const float backbuffer_scale)
   const double fps = GetFPS();
   const double vps = GetVPS();
   const double speed = GetSpeed();
+  const u32 width = GetEFBWidth();
+  const u32 height = GetEFBHeight();
 
   static ImVec2 last_display_size(-1.0f, -1.0f);
 
@@ -318,6 +335,26 @@ void PerformanceMetrics::DrawImGuiStats(const float backbuffer_scale)
     ImGui::End();
   }
 
+  if (g_ActiveConfig.bShowInternalResolution)
+  {
+    ImGui::SetNextWindowPos(ImVec2(window_x, window_y), set_next_position_condition,
+                            ImVec2(1.0f, 0.0f));
+    ImGui::SetNextWindowBgAlpha(bg_alpha);
+
+    if (ImGui::Begin("ResolutionStats", nullptr, imgui_flags))
+    {
+      if (stack_vertically)
+        window_y += ImGui::GetWindowHeight() + window_padding;
+      else
+        window_x -= ImGui::GetWindowWidth() + window_padding;
+
+      clamp_window_position();
+
+      ImGui::TextColored(ImVec4(r, g, b, 1.0f), "Res: %ux%u", width, height);
+    }
+    ImGui::End();
+  }
+
   if (g_ActiveConfig.bShowVPS || g_ActiveConfig.bShowVTimes)
   {
     // Position in the top-right corner of the screen.
diff --git a/Source/Core/VideoCommon/PerformanceMetrics.h b/Source/Core/VideoCommon/PerformanceMetrics.h
index 6a6260a611..538360a05b 100644
--- a/Source/Core/VideoCommon/PerformanceMetrics.h
+++ b/Source/Core/VideoCommon/PerformanceMetrics.h
@@ -41,7 +41,8 @@ public:
   double GetVPS() const;
   double GetSpeed() const;
   double GetMaxSpeed() const;
-
+  u32 GetEFBWidth() const;
+  u32 GetEFBHeight() const;
   // Call from any thread.
   void SetLatestFramePresentationOffset(DT offset);
 
diff --git a/Source/Core/VideoCommon/VideoConfig.cpp b/Source/Core/VideoCommon/VideoConfig.cpp
index d2cacd7276..1c8d9336da 100644
--- a/Source/Core/VideoCommon/VideoConfig.cpp
+++ b/Source/Core/VideoCommon/VideoConfig.cpp
@@ -101,6 +101,7 @@ void VideoConfig::Refresh()
   bCrop = Config::Get(Config::GFX_CROP);
   iSafeTextureCache_ColorSamples = Config::Get(Config::GFX_SAFE_TEXTURE_CACHE_COLOR_SAMPLES);
   bShowFPS = Config::Get(Config::GFX_SHOW_FPS);
+  bShowInternalResolution = Config::Get(Config::GFX_SHOW_INTERNAL_RESOLUTION);
   bShowFTimes = Config::Get(Config::GFX_SHOW_FTIMES);
   bShowVPS = Config::Get(Config::GFX_SHOW_VPS);
   bShowVTimes = Config::Get(Config::GFX_SHOW_VTIMES);
diff --git a/Source/Core/VideoCommon/VideoConfig.h b/Source/Core/VideoCommon/VideoConfig.h
index 2d0ab116a1..69b24ad060 100644
--- a/Source/Core/VideoCommon/VideoConfig.h
+++ b/Source/Core/VideoCommon/VideoConfig.h
@@ -245,6 +245,7 @@ struct VideoConfig final
 
   // Information
   bool bShowFPS = false;
+  bool bShowInternalResolution = false;
   bool bShowFTimes = false;
   bool bShowVPS = false;
   bool bShowVTimes = false;
-- 
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