From fcdab1645c19c4b80c8bbe84e3d207d8859169f7 Mon Sep 17 00:00:00 2001
From: BSzili <col.lawrence@gmail.com>
Date: Sun, 28 Sep 2025 09:36:18 +0200
Subject: [PATCH 1/2] SDL2 gamma correction support

---
 Sources/Engine/Graphics/GfxLibrary.cpp | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/Sources/Engine/Graphics/GfxLibrary.cpp b/Sources/Engine/Graphics/GfxLibrary.cpp
index 56c5baa9b..59139e4f4 100755
--- a/Sources/Engine/Graphics/GfxLibrary.cpp
+++ b/Sources/Engine/Graphics/GfxLibrary.cpp
@@ -86,7 +86,7 @@ extern BOOL CVA_bModels;
 static FLOAT _fLastBrightness, _fLastContrast, _fLastGamma;
 static FLOAT _fLastBiasR, _fLastBiasG, _fLastBiasB;
 static INDEX _iLastLevels;
-#ifdef PLATFORM_WIN32 // DG: not used on other platforms
+#ifndef PLATFORM_PANDORA // DG: not used on other platforms
 static UWORD _auwGammaTable[256*3];
 #endif
 
@@ -1799,7 +1799,7 @@ INDEX _ctProbeShdU = 0;
 INDEX _ctProbeShdB = 0;
 INDEX _ctFullShdU  = 0;
 SLONG _slFullShdUBytes = 0;
-#ifdef PLATFORM_WIN32 // only used there
+#ifndef PLATFORM_PANDORA // only used there
 static BOOL GenerateGammaTable(void);
 #endif
 
@@ -2003,6 +2003,18 @@ void CGfxLibrary::SwapBuffers(CViewPort *pvp)
     }
   } 
   else
+#else
+  if( gl_ulFlags & GLF_ADJUSTABLEGAMMA) {
+    // ... and required
+    const BOOL bTableSet = GenerateGammaTable();
+    if( bTableSet) {
+        Uint16 *rampR = &_auwGammaTable[0];
+        Uint16 *rampG = &_auwGammaTable[256];
+        Uint16 *rampB = &_auwGammaTable[512];
+        SDL_SetWindowGammaRamp((SDL_Window *) pvp->vp_hWnd, rampR, rampG, rampB);
+    }
+  }
+  else
 #endif
   // if not supported
   {
@@ -2063,7 +2075,7 @@ void CGfxLibrary::UnlockRaster( CRaster *praToUnlock)
 }
 
 
-#ifdef PLATFORM_WIN32 // DG: only used on windows
+#ifndef PLATFORM_PANDORA // DG: only used on windows
 // generates gamma table and returns true if gamma table has been changed
 static BOOL GenerateGammaTable(void)
 {

From 66983f6d4f977cf133ab2565615ad9af66a3c85a Mon Sep 17 00:00:00 2001
From: BSzili <col.lawrence@gmail.com>
Date: Sun, 28 Sep 2025 11:14:29 +0200
Subject: [PATCH 2/2] Destroy the window and context after SE_EndEngine for
 non-Win32

---
 Sources/SeriousSam/SeriousSam.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Sources/SeriousSam/SeriousSam.cpp b/Sources/SeriousSam/SeriousSam.cpp
index 6dd64c147..8645dda33 100755
--- a/Sources/SeriousSam/SeriousSam.cpp
+++ b/Sources/SeriousSam/SeriousSam.cpp
@@ -696,7 +696,9 @@ void End(void)
     pdpNormal   = NULL;
   }
 
+#ifdef PLATFORM_WIN32
   CloseMainWindow();
+#endif
   MainWindow_End();
   DestroyMenus();
   _pGame->End();
@@ -704,6 +706,9 @@ void End(void)
   // unlock the directory
   DirectoryLockOff();
   SE_EndEngine();
+#ifndef PLATFORM_WIN32
+  CloseMainWindow();
+#endif
 
 #if PLATFORM_UNIX
   SDL_Quit();