-fixed: When performing a restart the SW scene drawer's resources should be reset because they are outside the control of higher level containers.

src/d_main.cpp

@@ -2738,6 +2738,7 @@ void D_DoomMain (void)
 		M_SaveDefaults(NULL);			// save config before the restart
 
 		// delete all data that cannot be left until reinitialization
+		screen->CleanForRestart();
 		V_ClearFonts();					// must clear global font pointers
 		ColorSets.Clear();
 		PainFlashes.Clear();

src/gl/renderer/gl_renderer.cpp

@@ -361,6 +361,13 @@ int FGLRenderer::ScreenToWindowY(int y)
 //
 //===========================================================================
 
+void FGLRenderer::ResetSWScene()
+{
+	// force recreation of the SW scene drawer to ensure it gets a new set of resources.
+	if (swdrawer != nullptr) delete swdrawer;
+	swdrawer = nullptr;
+}
+
 void FGLRenderer::SetupLevel()
 {
 	mVBO->CreateVBO();

src/gl/renderer/gl_renderer.h

@@ -172,6 +172,7 @@ public:
 
 	void FlushTextures();
 	void SetupLevel();
+	void ResetSWScene();
 
 	void RenderScreenQuad();
 	void PostProcessScene(int fixedcm, const std::function<void()> &afterBloomDrawEndScene2D);

src/gl/system/gl_framebuffer.cpp

@@ -385,6 +385,12 @@ bool OpenGLFrameBuffer::SetContrast(float contrast)
 //
 //===========================================================================
 
+void OpenGLFrameBuffer::CleanForRestart()
+{
+	if (GLRenderer)
+		GLRenderer->ResetSWScene();
+}
+
 void OpenGLFrameBuffer::UpdatePalette()
 {
 	if (GLRenderer)

src/gl/system/gl_framebuffer.h

@@ -39,6 +39,7 @@ public:
 	bool SetContrast(float contrast);
 	void DoSetGamma();
 
+	void CleanForRestart() override;
 	void UpdatePalette() override;
 	void GetFlashedPalette (PalEntry pal[256]) override;
 	PalEntry *GetPalette () override;

src/v_video.h

@@ -355,7 +355,8 @@ public:
 	// Set the rect defining the area affected by blending.
 	virtual void SetBlendingRect (int x1, int y1, int x2, int y2);
 
-	virtual bool LegacyHardware() const { return false; }	// only for reporting SM1.4 support to the stat collector
+	// Delete any resources that need to be deleted after restarting with a different IWAD
+	virtual void CleanForRestart() {}
 
 	// Begin 2D drawing operations.
 	// Returns true if hardware-accelerated 2D has been entered, false if not.