1.5X resolution scaler option

src/common/settings.cpp

@@ -129,6 +129,10 @@ void UpdateRescalingInfo() {
         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;

src/common/settings.h

@@ -56,11 +56,12 @@ enum class ResolutionSetup : u32 {
     Res1_2X = 0,
     Res3_4X = 1,
     Res1X = 2,
-    Res2X = 3,
-    Res3X = 4,
-    Res4X = 5,
-    Res5X = 6,
-    Res6X = 7,
+    Res3_2X = 3,
+    Res2X = 4,
+    Res3X = 5,
+    Res4X = 6,
+    Res5X = 7,
+    Res6X = 8,
 };
 
 enum class ScalingFilter : u32 {

src/yuzu/configuration/configure_graphics.ui

@@ -364,6 +364,11 @@
                <string>1X (720p/1080p)</string>
               </property>
              </item>
+             <item>
+              <property name="text">
+                  <string>1.5X (1080p/1620p) [EXPERIMENTAL]</string>
+              </property>
+             </item>
              <item>
               <property name="text">
                <string>2X (1440p/2160p)</string>