2 files changed, 60 insertions, 4 deletions

diff --git a/src/common/settings.cpp b/src/common/settings.cpp
index 8c6be2c84..dd3a3d456 100644
--- a/src/common/settings.cpp
+++ b/src/common/settings.cpp
@@ -106,6 +106,57 @@ float Volume() {
     return values.volume.GetValue() / 100.0f;
 }
 
+void UpdateRescalingInfo() {
+    auto setup = values.resolution_setup.GetValue();
+    auto& info = values.resolution_info;
+    switch (setup) {
+    case ResolutionSetup::Res1_2X: {
+        info.up_scale = 1;
+        info.down_shift = 1;
+        break;
+    }
+    case ResolutionSetup::Res3_4X: {
+        info.up_scale = 3;
+        info.down_shift = 2;
+        break;
+    }
+    case ResolutionSetup::Res1X: {
+        info.up_scale = 1;
+        info.down_shift = 0;
+        break;
+    }
+    case ResolutionSetup::Res3_2X: {
+        info.up_scale = 3;
+        info.down_shift = 1;
+        break;
+    }
+    case ResolutionSetup::Res2X: {
+        info.up_scale = 2;
+        info.down_shift = 0;
+        break;
+    }
+    case ResolutionSetup::Res3X: {
+        info.up_scale = 3;
+        info.down_shift = 0;
+        break;
+    }
+    case ResolutionSetup::Res4X: {
+        info.up_scale = 4;
+        info.down_shift = 0;
+        break;
+    }
+    default: {
+        UNREACHABLE();
+        info.up_scale = 1;
+        info.down_shift = 0;
+    }
+    }
+    info.up_factor = static_cast<f32>(info.up_scale) / (1U << info.down_shift);
+    info.down_factor = static_cast<f32>(1U << info.down_shift) / info.up_scale;
+    info.size_up = info.up_scale * info.up_scale;
+    info.size_shift = info.down_shift * 2;
+}
+
 void RestoreGlobalState(bool is_powered_on) {
     // If a game is running, DO NOT restore the global settings state
     if (is_powered_on) {
diff --git a/src/common/settings.h b/src/common/settings.h
index 08f3da055..f4df2fc95 100644
--- a/src/common/settings.h
+++ b/src/common/settings.h
@@ -56,16 +56,19 @@ enum class ResolutionSetup : u32 {
     Res1_2X = 0,
     Res3_4X = 1,
     Res1X = 2,
-    Res3_2K = 3,
+    Res3_2X = 3,
     Res2X = 4,
     Res3X = 5,
+    Res4X = 6,
 };
 
 struct ResolutionScalingInfo {
-    u32 up_scale{2};
+    u32 up_scale{1};
     u32 down_shift{0};
-    f32 up_factor{2.0f};
-    f32 down_factor{0.5f};
+    f32 up_factor{1.0f};
+    f32 down_factor{1.0f};
+    u32 size_up{1};
+    u32 size_shift{0};
 };
 
 /** The BasicSetting class is a simple resource manager. It defines a label and default value
@@ -613,6 +616,8 @@ std::string GetTimeZoneString();
 
 void LogSettings();
 
+void UpdateRescalingInfo();
+
 // Restore the global state of all applicable settings in the Values struct
 void RestoreGlobalState(bool is_powered_on);