From b8a7f816b52775fdcfb3503f0000accb8cd65765 Mon Sep 17 00:00:00 2001
From: dtentiion <dtentiongit@gmail.com>
Date: Mon, 2 Mar 2026 23:50:45 +0000
Subject: Win64: configurable username (username.txt) and persistent game
 settings (settings.dat) (#195)

---
 Minecraft.Client/Windows64/Windows64_App.cpp       | 57 +++++++++++++++++++++-
 Minecraft.Client/Windows64/Windows64_App.h         |  2 +
 Minecraft.Client/Windows64/Windows64_Minecraft.cpp | 27 +++++++++-
 3 files changed, 82 insertions(+), 4 deletions(-)

(limited to 'Minecraft.Client/Windows64')

diff --git a/Minecraft.Client/Windows64/Windows64_App.cpp b/Minecraft.Client/Windows64/Windows64_App.cpp
index dbc1bfc5..461e8c34 100644
--- a/Minecraft.Client/Windows64/Windows64_App.cpp
+++ b/Minecraft.Client/Windows64/Windows64_App.cpp
@@ -10,11 +10,46 @@
 #include "..\..\Minecraft.World\BiomeSource.h"
 #include "..\..\Minecraft.World\LevelType.h"
 
+wstring g_playerName;
+
 CConsoleMinecraftApp app;
 
+static void LoadPlayerName()
+{
+	if (!g_playerName.empty()) return;
+	g_playerName = L"Windows";
+
+	char exePath[MAX_PATH] = {};
+	GetModuleFileNameA(NULL, exePath, MAX_PATH);
+	char *lastSlash = strrchr(exePath, '\\');
+	if (lastSlash) *(lastSlash + 1) = '\0';
+	char filePath[MAX_PATH] = {};
+	_snprintf_s(filePath, sizeof(filePath), _TRUNCATE, "%susername.txt", exePath);
+
+	FILE *f = NULL;
+	if (fopen_s(&f, filePath, "r") == 0 && f)
+	{
+		char buf[128] = {};
+		if (fgets(buf, sizeof(buf), f))
+		{
+			int len = (int)strlen(buf);
+			while (len > 0 && (buf[len-1] == '\n' || buf[len-1] == '\r' || buf[len-1] == ' '))
+				buf[--len] = '\0';
+			if (len > 0)
+			{
+				wchar_t wbuf[128] = {};
+				mbstowcs(wbuf, buf, 127);
+				g_playerName = wbuf;
+			}
+		}
+		fclose(f);
+	}
+}
+
 CConsoleMinecraftApp::CConsoleMinecraftApp() : CMinecraftApp()
 {
 	m_bShutdown = false;
+	LoadPlayerName();
 }
 
 void CConsoleMinecraftApp::SetRichPresenceContext(int iPad, int contextId)
@@ -35,9 +70,27 @@ void CConsoleMinecraftApp::FatalLoadError()
 
 void CConsoleMinecraftApp::CaptureSaveThumbnail()
 {
+	RenderManager.CaptureThumbnail(&m_ThumbnailBuffer);
 }
 void CConsoleMinecraftApp::GetSaveThumbnail(PBYTE *pbData,DWORD *pdwSize)
 {
+	// On a save caused by a create world, the thumbnail capture won't have happened
+	if (m_ThumbnailBuffer.Allocated())
+	{
+		if (pbData)
+		{
+			*pbData  = new BYTE[m_ThumbnailBuffer.GetBufferSize()];
+			*pdwSize = m_ThumbnailBuffer.GetBufferSize();
+			memcpy(*pbData, m_ThumbnailBuffer.GetBufferPointer(), *pdwSize);
+		}
+		m_ThumbnailBuffer.Release();
+	}
+	else
+	{
+		// No capture happened (e.g. first save on world creation) leave thumbnail as NULL
+		if (pbData)  *pbData  = NULL;
+		if (pdwSize) *pdwSize = 0;
+	}
 }
 void CConsoleMinecraftApp::ReleaseSaveThumbnail()
 {
@@ -57,8 +110,8 @@ void CConsoleMinecraftApp::TemporaryCreateGameStart()
 	Minecraft *pMinecraft=Minecraft::GetInstance();
 	app.ReleaseSaveThumbnail();
 	ProfileManager.SetLockedProfile(0);
-	extern wchar_t g_Win64UsernameW[17];
-	pMinecraft->user->name = g_Win64UsernameW;
+	LoadPlayerName();
+	pMinecraft->user->name = g_playerName;
 	app.ApplyGameSettingsChanged(0);
 
 	////////////////////////////////////////////////////////////////////////////////////////////// From CScene_MultiGameJoinLoad::OnInit
diff --git a/Minecraft.Client/Windows64/Windows64_App.h b/Minecraft.Client/Windows64/Windows64_App.h
index de8f6d85..bff916ec 100644
--- a/Minecraft.Client/Windows64/Windows64_App.h
+++ b/Minecraft.Client/Windows64/Windows64_App.h
@@ -1,7 +1,9 @@
 #pragma once
+#include "4JLibs\inc\4J_Render.h"
 
 class CConsoleMinecraftApp : public CMinecraftApp
 {
+	ImageFileBuffer m_ThumbnailBuffer;
 public:
 	CConsoleMinecraftApp();
 
diff --git a/Minecraft.Client/Windows64/Windows64_Minecraft.cpp b/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
index 5bd1a546..a1bdcd0f 100644
--- a/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
+++ b/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
@@ -827,7 +827,16 @@ int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
 	UNREFERENCED_PARAMETER(hPrevInstance);
 	UNREFERENCED_PARAMETER(lpCmdLine);
 
-	dyn_SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE);
+	// 4J-Win64: set CWD to exe dir so asset paths resolve correctly
+	{
+		char szExeDir[MAX_PATH] = {};
+		GetModuleFileNameA(NULL, szExeDir, MAX_PATH);
+		char *pSlash = strrchr(szExeDir, '\\');
+		if (pSlash) { *(pSlash + 1) = '\0'; SetCurrentDirectoryA(szExeDir); }
+	}
+
+	// Declare DPI awareness so GetSystemMetrics returns physical pixels
+	SetProcessDPIAware();
 	g_iScreenWidth = GetSystemMetrics(SM_CXSCREEN);
 	g_iScreenHeight = GetSystemMetrics(SM_CYSCREEN);
 
@@ -1361,7 +1370,21 @@ int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
 			}
 		}
 
-		// F11 toggles fullscreen
+		// F3 toggles the debug console overlay, F11 toggles fullscreen
+		if (KMInput.IsKeyPressed(VK_F3))
+		{
+			static bool s_debugConsole = false;
+			s_debugConsole = !s_debugConsole;
+			ui.ShowUIDebugConsole(s_debugConsole);
+		}
+
+#ifdef _DEBUG_MENUS_ENABLED
+		if (KMInput.IsKeyPressed(VK_F4))
+		{
+			ui.NavigateToScene(ProfileManager.GetPrimaryPad(), eUIScene_DebugOverlay, NULL, eUILayer_Debug);
+		}
+#endif
+
 		if (KMInput.IsKeyPressed(VK_F11))
 		{
 			ToggleFullscreen();
-- 
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