From 626be93750560b424b3fbca2373c94d897c251fa Mon Sep 17 00:00:00 2001
From: 54ac <me@54ac.ovh>
Date: Sat, 2 May 2026 00:05:33 +0200
Subject: [PATCH] Use mainui's truetype font rendering for on screen text

---
 BaseMenu.h                     |  1 +
 HudFont.cpp                    | 49 ++++++++++++++++++++++++++++++++++
 Utils.h                        |  3 +++
 font/FontManager.cpp           |  9 +++++++
 sdk_includes/engine/menu_int.h |  3 +++
 udll_int.cpp                   |  5 +++-
 6 files changed, 69 insertions(+), 1 deletion(-)
 create mode 100644 HudFont.cpp

diff --git a/BaseMenu.h b/BaseMenu.h
index 4677495..b462330 100755
--- a/BaseMenu.h
+++ b/BaseMenu.h
@@ -95,6 +95,7 @@ typedef struct
 	HFont hBoldFont;
 	HFont hLightBlur;
 	HFont hHeavyBlur;
+	HFont hHudFont;
 
 	bool	m_fDemosPlayed;
 	bool	m_fNoOldBackground;
diff --git a/HudFont.cpp b/HudFont.cpp
new file mode 100644
index 0000000..12be025
--- /dev/null
+++ b/HudFont.cpp
@@ -0,0 +1,49 @@
+/*
+HudFont.cpp - engine callbacks for drawing HUD text
+Uses mainui's font rendering stack instead of the engine bitmap font
+*/
+#include "extdll_menu.h"
+#include "BaseMenu.h"
+#include "font/FontManager.h"
+#include "font/BaseFontBackend.h"
+
+// all coordinates and return values are in real screen pixels
+
+int UI_DrawHudCharacter( int x, int y, int ch, int r, int g, int b )
+{
+	if( !g_FontMgr || !uiStatic.hHudFont )
+		return 0;
+
+	CBaseFont *font = g_FontMgr->GetIFontFromHandle( uiStatic.hHudFont );
+	if( !font )
+		return 0;
+
+	unsigned int color = PackRGBA( r, g, b, 255 );
+	return font->DrawCharacter( ch, Point( x, y ), font->GetTall( ), color, true );
+}
+
+int UI_GetHudFontHeight( void )
+{
+	if( !g_FontMgr || !uiStatic.hHudFont )
+		return 0;
+
+	CBaseFont *font = g_FontMgr->GetIFontFromHandle( uiStatic.hHudFont );
+	if( !font )
+		return 0;
+
+	return font->GetHeight( );
+}
+
+int UI_GetHudCharWidth( int ch )
+{
+	if( !g_FontMgr || !uiStatic.hHudFont )
+		return 0;
+
+	CBaseFont *font = g_FontMgr->GetIFontFromHandle( uiStatic.hHudFont );
+	if( !font )
+		return 0;
+
+	int a, b, c;
+	font->GetCharABCWidths( ch, a, b, c );
+	return a + b + c;
+}
diff --git a/Utils.h b/Utils.h
index 3387649..13d8a84 100644
--- a/Utils.h
+++ b/Utils.h
@@ -166,6 +166,9 @@ int KEY_GetKey( const char *binding );			// ripped out from engine
 char *StringCopy( const char *input );			// copy string into new memory
 void Com_EscapeCommand( char *newCommand, const char *oldCommand, int len );
 void UI_EnableTextInput( bool enable );
+int UI_DrawHudCharacter( int x, int y, int ch, int r, int g, int b );
+int UI_GetHudFontHeight( void );
+int UI_GetHudCharWidth( int ch );
 
 void UI_LoadCustomStrings( void );
 const char *L( const char *szStr ); // L means Localize!
diff --git a/font/FontManager.cpp b/font/FontManager.cpp
index e319369..e4c33c3 100644
--- a/font/FontManager.cpp
+++ b/font/FontManager.cpp
@@ -104,6 +104,15 @@ void CFontManager::VidInit( void )
 			.Create();
 		prevScale = scale;
 	}
+
+	// rebuild hud font every VidInit since hud_truetype_size may change
+	if( uiStatic.hHudFont )
+		g_FontMgr->DeleteFont( uiStatic.hHudFont );
+	float hudSize = EngFuncs::GetCvarFloat( "hud_truetype_size" );
+	if( hudSize <= 0.0f )
+		hudSize = 16.0f;
+	uiStatic.hHudFont = CFontBuilder( DEFAULT_MENUFONT, hudSize * scale, DEFAULT_WEIGHT )
+		.Create();
 }
 
 void CFontManager::DeleteAllFonts()
diff --git a/sdk_includes/engine/menu_int.h b/sdk_includes/engine/menu_int.h
index f86c8b1..e84de66 100644
--- a/sdk_includes/engine/menu_int.h
+++ b/sdk_includes/engine/menu_int.h
@@ -246,6 +246,9 @@ typedef struct
 	void (*pfnConnectionProgress_Connect)( const char *server ); // NULL for local server
 	void (*pfnConnectionProgress_ChangeLevel)( void );
 	void (*pfnConnectionProgress_ParseServerInfo)( const char *server );
+	int (*pfnDrawHudCharacter)( int x, int y, int ch, int r, int g, int b );
+	int (*pfnGetHudFontHeight)( void );
+	int (*pfnGetHudCharWidth)( int ch );
 } UI_EXTENDED_FUNCTIONS;
 
 typedef int (*MENUAPI)( UI_FUNCTIONS *pFunctionTable, ui_enginefuncs_t* engfuncs, ui_globalvars_t *pGlobals );
diff --git a/udll_int.cpp b/udll_int.cpp
index 1d63e55..36708ca 100644
--- a/udll_int.cpp
+++ b/udll_int.cpp
@@ -76,7 +76,10 @@ static UI_EXTENDED_FUNCTIONS gExtendedTable =
 	UI_ConnectionProgress_Precache,
 	UI_ConnectionProgress_Connect,
 	UI_ConnectionProgress_ChangeLevel,
-	UI_ConnectionProgress_ParseServerInfo
+	UI_ConnectionProgress_ParseServerInfo,
+	UI_DrawHudCharacter,
+	UI_GetHudFontHeight,
+	UI_GetHudCharWidth,
 };
 
 extern "C" EXPORT int GetExtAPI( int version, UI_EXTENDED_FUNCTIONS *pFunctionTable, ui_extendedfuncs_t *pEngfuncsFromEngine )