Revert "Remove half pixel offset"

This reverts commit 68d1a30.

Author: IsaacMarovitz

MarathonRecomp/gpu/video.cpp

@@ -170,6 +170,8 @@ struct SharedConstants
     uint32_t swappedBinormals{};
     uint32_t swappedTangents{};
     uint32_t swappedBlendWeights{};
+    float halfPixelOffsetX{};
+    float halfPixelOffsetY{};
     float alphaThreshold{};
 };
 
@@ -3626,6 +3628,12 @@ static void SetFramebuffer(GuestSurface* renderTarget, GuestSurface* depthStenci
             g_framebuffer = nullptr;
         }
 
+        if (g_framebuffer != nullptr)
+        {
+            SetDirtyValue(g_dirtyStates.sharedConstants, g_sharedConstants.halfPixelOffsetX, 1.0f / float(g_framebuffer->getWidth()));
+            SetDirtyValue(g_dirtyStates.sharedConstants, g_sharedConstants.halfPixelOffsetY, -1.0f / float(g_framebuffer->getHeight()));
+        }
+
         g_dirtyStates.renderTargetAndDepthStencil = settingForClear;
     }
 }