Add IGraphics::GetScreenName

To get the screen name for each screen index.

src/engine/client/backend_sdl.cpp

@@ -882,6 +882,12 @@ bool CGraphicsBackend_SDL_GL::GetDriverVersion(EGraphicsDriverAgeType DriverAgeT
 	return false;
 }
 
+const char *CGraphicsBackend_SDL_GL::GetScreenName(int Screen) const
+{
+	const char *pName = SDL_GetDisplayName(Screen);
+	return pName == nullptr ? "unknown/error" : pName;
+}
+
 static void DisplayToVideoMode(CVideoMode *pVMode, SDL_DisplayMode *pMode, int HiDPIScale, int RefreshRate)
 {
 	pVMode->m_CanvasWidth = pMode->w * HiDPIScale;

src/engine/client/backend_sdl.h

@@ -253,6 +253,7 @@ public:
 	const TTWGraphicsGPUList &GetGPUs() const override;
 
 	int GetNumScreens() const override { return m_NumScreens; }
+	const char *GetScreenName(int Screen) const override;
 
 	void GetVideoModes(CVideoMode *pModes, int MaxModes, int *pNumModes, int HiDPIScale, int MaxWindowWidth, int MaxWindowHeight, int ScreenID) override;
 	void GetCurrentVideoMode(CVideoMode &CurMode, int HiDPIScale, int MaxWindowWidth, int MaxWindowHeight, int ScreenID) override;

src/engine/client/graphics_threaded.cpp

@@ -2939,6 +2939,11 @@ int CGraphics_Threaded::GetNumScreens() const
 	return m_pBackend->GetNumScreens();
 }
 
+const char *CGraphics_Threaded::GetScreenName(int Screen) const
+{
+	return m_pBackend->GetScreenName(Screen);
+}
+
 void CGraphics_Threaded::Minimize()
 {
 	m_pBackend->Minimize();

src/engine/client/graphics_threaded.h

@@ -731,6 +731,7 @@ public:
 	virtual void GetCurrentVideoMode(CVideoMode &CurMode, int HiDPIScale, int MaxWindowWidth, int MaxWindowHeight, int Screen) = 0;
 
 	virtual int GetNumScreens() const = 0;
+	virtual const char *GetScreenName(int Screen) const = 0;
 
 	virtual void Minimize() = 0;
 	virtual void Maximize() = 0;
@@ -1257,6 +1258,8 @@ public:
 	void IndicesNumRequiredNotify(unsigned int RequiredIndicesCount) override;
 
 	int GetNumScreens() const override;
+	const char *GetScreenName(int Screen) const override;
+
 	void Minimize() override;
 	void Maximize() override;
 	void WarnPngliteIncompatibleImages(bool Warn) override;

src/engine/graphics.h

@@ -506,6 +506,7 @@ public:
 
 	virtual void Swap() = 0;
 	virtual int GetNumScreens() const = 0;
+	virtual const char *GetScreenName(int Screen) const = 0;
 
 	// synchronization
 	virtual void InsertSignal(class CSemaphore *pSemaphore) = 0;