add m_bHalveTextureHeight for 8:3 displays

stepmania/src/PrefsManager.cpp

@@ -218,6 +218,7 @@ PrefsManager::PrefsManager()
 	m_bHideDefaultNoteSkin = false;
 	m_iMaxHighScoresPerList = 10;
 	m_fPadStickSeconds = 0;
+	m_bHalveTextureHeight = false;
 	g_bAutoRestart = false;
 	m_bSignProfileData = false;
 
@@ -506,6 +507,7 @@ void PrefsManager::ReadGlobalPrefsFromDisk()
 	ini.GetValue( "Options", "HideDefaultNoteSkin",				m_bHideDefaultNoteSkin );
 	ini.GetValue( "Options", "MaxHighScoresPerList",			m_iMaxHighScoresPerList );
 	ini.GetValue( "Options", "PadStickSeconds",					m_fPadStickSeconds );
+	ini.GetValue( "Options", "HalveTextureHeight",				m_bHalveTextureHeight );
 	ini.GetValue( "Options", "AutoRestart",						g_bAutoRestart );
 	ini.GetValue( "Options", "SignProfileData",					m_bSignProfileData );
 
@@ -725,6 +727,7 @@ void PrefsManager::SaveGlobalPrefsToDisk() const
 	ini.SetValue( "Options", "HideDefaultNoteSkin",				m_bHideDefaultNoteSkin );
 	ini.SetValue( "Options", "MaxHighScoresPerList",			m_iMaxHighScoresPerList );
 	ini.SetValue( "Options", "PadStickSeconds",					m_fPadStickSeconds );
+	ini.SetValue( "Options", "HalveTextureHeight",				m_bHalveTextureHeight );
 	ini.SetValue( "Options", "AutoRestart",						g_bAutoRestart );
 	ini.SetValue( "Options", "SignProfileData",					m_bSignProfileData );
 

stepmania/src/PrefsManager.h

@@ -198,6 +198,11 @@ public:
 	// after pressed.
 	float			m_fPadStickSeconds;
 
+	// For 8:3 displays (640x240 arcade monitors), every odd line of texels
+	// doesn't get drawn.  This makes text look really ugly.  So, squash all
+	// textures to half height to match the aspect ratio of the display.
+	float			m_bHalveTextureHeight;
+
 	// If true, then signatures created when writing profile data 
 	// and verified when reading profile data.  Leave this false if 
 	// you want to use a profile on different machines that don't 

stepmania/src/RageBitmapTexture.cpp

@@ -19,6 +19,7 @@
 #include "RageDisplay.h"
 #include "RageTypes.h"
 #include "arch/ArchHooks/ArchHooks.h"
+#include "PrefsManager.h"
 
 #include "SDL.h"
 #include "SDL_endian.h"
@@ -178,6 +179,9 @@ apply_color_key:
 	m_iImageWidth = min( m_iSourceWidth, actualID.iMaxSize );
 	m_iImageHeight = min( m_iSourceHeight, actualID.iMaxSize );
 
+	if( PREFSMAN->m_bHalveTextureHeight )
+		m_iImageHeight /= 2;
+
 	/* Texture dimensions need to be a power of two; jump to the next. */
 	m_iTextureWidth = power_of_two(m_iImageWidth);
 	m_iTextureHeight = power_of_two(m_iImageHeight);