From 3b7978b84d647c444ecfc85c147e52038a4104e6 Mon Sep 17 00:00:00 2001
From: fallenoak <git@fallenoak.me>
Date: Mon, 13 Mar 2023 01:16:07 -0500
Subject: [PATCH] feat(gx): add conditional shrink of proj matrix in d3d
 backend

---
 src/gx/d3d/CGxDeviceD3d.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/gx/d3d/CGxDeviceD3d.cpp b/src/gx/d3d/CGxDeviceD3d.cpp
index 4137cd9..f92ff21 100644
--- a/src/gx/d3d/CGxDeviceD3d.cpp
+++ b/src/gx/d3d/CGxDeviceD3d.cpp
@@ -1713,7 +1713,16 @@ void CGxDeviceD3d::IXformSetProjection(const C44Matrix& matrix) {
         projNative._43 = v9 / (v9 - v10);
     }
 
-    // TODO shrink
+    if (!this->MasterEnable(GxMasterEnable_NormalProjection) && projNative._44 != 1.0f) {
+        DirectX::XMMATRIX shrink = {
+            0.2f, 0.0f, 0.0f, 0.0f,
+            0.0f, 0.2f, 0.0f, 0.0f,
+            0.0f, 0.0f, 0.2f, 0.0f,
+            0.0f, 0.0f, 0.0f, 1.0f
+        };
+
+        projNative *= shrink;
+    }
 
     this->m_xforms[GxXform_Projection].m_dirty = 1;
     memcpy(&this->m_projNative, &projNative, sizeof(this->m_projNative));