From 3c52436c08607ca4a52b38a6dbdd195c398b879c Mon Sep 17 00:00:00 2001
From: MrTheShy <49885496+MrTheShy@users.noreply.github.com>
Date: Mon, 9 Mar 2026 00:36:56 +0100
Subject: Fix crash when launching at 720p or lower resolutions (#981)

The HD skin libraries (skinHD.swf, skinHDHud.swf, etc.) are loaded
unconditionally on Win64/Durango/Orbis, and they import the Iggy
library "platformskinHD.swf" by name. However, the platform skin
path and registration name were gated behind a runtime resolution
check (m_fScreenHeight > 720.0f), so at exactly 720p the skin was
registered as "platformskin.swf" instead, and below 720p the non-HD
.swf file was loaded entirely. This caused Iggy to fail resolving
the import, which cascaded into a failed scene load and hit a
__debugbreak().

Always use the HD platform skin on these platforms since the HD
libraries that depend on it are always loaded regardless of
resolution. PS3/PSVita are unaffected as they have their own
non-HD skin loading path.
---
 Minecraft.Client/Common/UI/UIController.cpp | 47 +++++++++--------------------
 1 file changed, 14 insertions(+), 33 deletions(-)

(limited to 'Minecraft.Client/Common/UI/UIController.cpp')

diff --git a/Minecraft.Client/Common/UI/UIController.cpp b/Minecraft.Client/Common/UI/UIController.cpp
index e64808fc..205a4f0b 100644
--- a/Minecraft.Client/Common/UI/UIController.cpp
+++ b/Minecraft.Client/Common/UI/UIController.cpp
@@ -529,43 +529,24 @@ void UIController::loadSkins()
 #elif defined __PSVITA__
 	platformSkinPath = L"skinVita.swf";
 #elif defined _WINDOWS64
-	if(m_fScreenHeight>720.0f)
-	{
-		platformSkinPath = L"skinHDWin.swf";
-	}
-	else
-	{
-		platformSkinPath = L"skinWin.swf";
-	}
+	// Windows64/Durango/Orbis always load HD skin libraries unconditionally,
+	// which import "platformskinHD.swf" by name.  The platform skin must
+	// therefore always be the HD variant regardless of screen resolution.
+	platformSkinPath = L"skinHDWin.swf";
 #elif defined _DURANGO
-	if(m_fScreenHeight>720.0f)
-	{
-		platformSkinPath = L"skinHDDurango.swf";
-	}
-	else
-	{
-		platformSkinPath = L"skinDurango.swf";
-	}
+	platformSkinPath = L"skinHDDurango.swf";
 #elif defined __ORBIS__
-	if(m_fScreenHeight>720.0f)
-	{
-		platformSkinPath = L"skinHDOrbis.swf";
-	}
-	else
-	{
-		platformSkinPath = L"skinOrbis.swf";
-	}
+	platformSkinPath = L"skinHDOrbis.swf";
 
 #endif
-	// Every platform has one of these, so nothing shared
-	if(m_fScreenHeight>720.0f)
-	{
-		m_iggyLibraries[eLibrary_Platform] = loadSkin(platformSkinPath, L"platformskinHD.swf");
-	}
-	else
-	{
-		m_iggyLibraries[eLibrary_Platform] = loadSkin(platformSkinPath, L"platformskin.swf");
-	}
+	// Every platform has one of these, so nothing shared.
+	// On HD platforms (Win64/Durango/Orbis) the skin libraries always import
+	// "platformskinHD.swf", so we must register under that name at any resolution.
+#if defined(_WINDOWS64) || defined(_DURANGO) || defined(__ORBIS__)
+	m_iggyLibraries[eLibrary_Platform] = loadSkin(platformSkinPath, L"platformskinHD.swf");
+#else
+	m_iggyLibraries[eLibrary_Platform] = loadSkin(platformSkinPath, L"platformskin.swf");
+#endif
 
 #if defined(__PS3__) || defined(__PSVITA__)
 	m_iggyLibraries[eLibrary_GraphicsDefault] = loadSkin(L"skinGraphics.swf", L"skinGraphics.swf");
-- 
cgit v1.2.3