From 727c748ecdb09e2990e55d8bd5015b487f935ad3 Mon Sep 17 00:00:00 2001
From: Christian Semmler <mail@csemmler.com>
Date: Mon, 16 Oct 2023 19:20:52 -0400
Subject: [PATCH] Implement/match MxVideoManager::InvalidateRect and
 UpdateRegion (#214)

* Implement/match MxVideoManager::InvalidateRect and UpdateRegion

* Update comment
---
 LEGO1/mxregion.cpp       |  5 +++--
 LEGO1/mxregion.h         | 14 ++++++++------
 LEGO1/mxvideomanager.cpp | 37 +++++++++++++++++++++++++++++++++----
 3 files changed, 44 insertions(+), 12 deletions(-)

diff --git a/LEGO1/mxregion.cpp b/LEGO1/mxregion.cpp
index 8b275e24..d16a1504 100644
--- a/LEGO1/mxregion.cpp
+++ b/LEGO1/mxregion.cpp
@@ -21,7 +21,7 @@ void MxRegion::Reset()
 }
 
 // OFFSET: LEGO1 0x100c3750 STUB
-void MxRegion::vtable18()
+void MxRegion::vtable18(MxRect32 &p_rect)
 {
   // TODO
 }
@@ -33,7 +33,8 @@ void MxRegion::vtable1c()
 }
 
 // OFFSET: LEGO1 0x100c3660 STUB
-void MxRegion::vtable20()
+MxBool MxRegion::vtable20()
 {
   // TODO
+  return FALSE;
 }
\ No newline at end of file
diff --git a/LEGO1/mxregion.h b/LEGO1/mxregion.h
index 92493c32..f68139a0 100644
--- a/LEGO1/mxregion.h
+++ b/LEGO1/mxregion.h
@@ -2,6 +2,7 @@
 #define MXREGION_H
 
 #include "mxcore.h"
+#include "mxrect32.h"
 #include "decomp.h"
 
 // VTABLE 0x100dcae8
@@ -13,16 +14,17 @@ public:
   virtual ~MxRegion() override;
 
   virtual void Reset();
-  virtual void vtable18();
+  virtual void vtable18(MxRect32 &p_rect);
   virtual void vtable1c();
-  virtual void vtable20();
+  virtual MxBool vtable20();
+
+  inline MxRect32 &GetRect() { return this->m_rect; }
 
 private:
   // A container (probably MxList) holding MxRect32
-  // MxList<MxRect32> *m_rects;
-  // 4 coordinates (could be MxRect32)
-  // MxS32 left, top, right, bottom;
-  undefined pad[0x14];
+  // MxList<MxRect32*> *m_rects;
+  undefined4 m_unk08;
+  MxRect32 m_rect;
 };
 
 #endif // MXREGION_H
diff --git a/LEGO1/mxvideomanager.cpp b/LEGO1/mxvideomanager.cpp
index 3581add8..d0945178 100644
--- a/LEGO1/mxvideomanager.cpp
+++ b/LEGO1/mxvideomanager.cpp
@@ -120,10 +120,34 @@ void MxVideoManager::SortPresenterList()
   }
 }
 
-// OFFSET: LEGO1 0x100be3e0 STUB
+// OFFSET: LEGO1 0x100be3e0
 void MxVideoManager::UpdateRegion()
 {
-  // TODO
+  if (m_region->vtable20() == FALSE) {
+    MxS32 left, top, right, bottom;
+    MxRect32 &regionRect = m_region->GetRect();
+
+    left = m_videoParam.GetRect().m_left;
+    if (left <= regionRect.m_left)
+      left = regionRect.m_left;
+
+    top = regionRect.m_top;
+    if (top <= m_videoParam.GetRect().m_top)
+      top = m_videoParam.GetRect().m_top;
+
+    right = regionRect.m_right;
+    if (right >= m_videoParam.GetRect().m_right)
+      right = m_videoParam.GetRect().m_right;
+    
+    bottom = m_videoParam.GetRect().m_bottom;
+    if (bottom >= regionRect.m_bottom)
+      bottom = regionRect.m_bottom;
+
+    m_displaySurface->Display(
+      left, top, left, top,
+      right - left + 1, bottom - top + 1
+    );
+  }
 }
 
 // OFFSET: LEGO1 0x100bea50
@@ -132,10 +156,15 @@ void MxVideoManager::Destroy()
   Destroy(FALSE);
 }
 
-// OFFSET: LEGO1 0x100bea60 STUB
+// OFFSET: LEGO1 0x100bea60
 void MxVideoManager::InvalidateRect(MxRect32 &p_rect)
 {
-  // TODO
+  m_criticalSection.Enter();
+
+  if (m_region)
+    m_region->vtable18(p_rect);
+
+  m_criticalSection.Leave();
 }
 
 // OFFSET: LEGO1 0x100bebe0