ref: context creating prototype, not working yet

engine/client/cl_game.c

@@ -1236,7 +1236,7 @@ static qboolean CL_LoadHudSprite( const char *szSpriteName, model_t *m_pSprite,
 
 	if( type == SPR_MAPSPRITE )
 		ref.dllFuncs.Mod_LoadMapSprite( m_pSprite, buf, size, &loaded );
-	else ref.dllFuncs.Mod_LoadModel( mod_sprite, m_pSprite, buf, &loaded, texFlags );
+	else Mod_LoadSpriteModel( m_pSprite, buf, &loaded, texFlags );
 
 	Mem_Free( buf );
 

engine/client/ref_common.c

@@ -2,6 +2,7 @@
 #include "client.h"
 #include "library.h"
 #include "cl_tent.h"
+#include "platform/platform.h"
 
 struct ref_state_s ref;
 ref_globals_t refState;
@@ -321,6 +322,7 @@ static ref_api_t gEngfuncs =
 	pfnCL_GetPaletteColor,
 	pfnCL_GetScreenInfo,
 	pfnSetLocalLightLevel,
+	Sys_CheckParm,
 
 	pfnPlayerInfo,
 	R_StudioGetPlayerState,
@@ -344,11 +346,12 @@ static ref_api_t gEngfuncs =
 	FS_FileExists,
 	FS_AllowDirectPaths,
 
-	NULL,
+	R_Init_Video,
-	NULL,
+	R_Free_Video,
-	NULL,
+
-	NULL,
+	GL_SetAttribute,
-	NULL,
+	GL_GetAttribute,
+	GL_GetProcAddress,
 
 	BuildGammaTable,
 	LightToTexGamma,
@@ -531,6 +534,7 @@ qboolean R_Init( void )
 	gl_showtextures = Cvar_Get( "gl_showtextures", "0", FCVAR_CHEAT, "show all uploaded textures" );
 	r_adjust_fov = Cvar_Get( "r_adjust_fov", "1", FCVAR_ARCHIVE, "making FOV adjustment for wide-screens" );
 	r_decals = Cvar_Get( "r_decals", "4096", FCVAR_ARCHIVE, "sets the maximum number of decals" );
+	gl_wgl_msaa_samples = Cvar_Get( "gl_wgl_msaa_samples", "0", FCVAR_GLCONFIG, "samples number for multisample anti-aliasing" );
 
 	if( !R_LoadProgs( refdll ))
 	{

engine/client/vgui/vgui_draw.c

@@ -194,6 +194,23 @@ qboolean VGui_IsActive( void )
 	return vgui.initialized;
 }
 
+void VGui_FillAPIFromRef( vguiapi_t *to, const ref_interface_t *from )
+{
+	to->DrawInit = from->VGUI_DrawInit;
+	to->DrawShutdown = from->VGUI_DrawShutdown;
+	to->SetupDrawingText = from->VGUI_SetupDrawingText;
+	to->SetupDrawingRect = from->VGUI_SetupDrawingRect;
+	to->SetupDrawingImage = from->VGUI_SetupDrawingImage;
+	to->BindTexture = from->VGUI_BindTexture;
+	to->EnableTexture = from->VGUI_EnableTexture;
+	to->CreateTexture = from->VGUI_CreateTexture;
+	to->UploadTexture = from->VGUI_UploadTexture;
+	to->UploadTextureBlock = from->VGUI_UploadTextureBlock;
+	to->DrawQuad = from->VGUI_DrawQuad;
+	to->GetTextureSizes = from->VGUI_GetTextureSizes;
+	to->GenerateTexture = from->VGUI_GenerateTexture;
+}
+
 /*
 ================
 VGui_Startup
@@ -218,6 +235,8 @@ void VGui_Startup( int width, int height )
 	{
 		vgui_utf8 = Cvar_Get( "vgui_utf8", "0", FCVAR_ARCHIVE, "enable utf-8 support for vgui text" );
 
+		VGui_FillAPIFromRef( &vgui, &ref.dllFuncs );
+
 #ifdef XASH_INTERNAL_GAMELIBS
 		s_pVGuiSupport = COM_LoadLibrary( "client", false, false );
 

engine/client/vid_common.c

@@ -29,7 +29,6 @@ convar_t	*vid_highdpi;
 
 vidstate_t vidState;
 glwstate_t	glw_state;
-glcontext_t glContext;
 
 convar_t	*window_xpos;
 convar_t	*window_ypos;

engine/client/vid_common.h

@@ -13,19 +13,6 @@ typedef struct vidmode_s
 } vidmode_t;
 
 
-typedef enum
-{
-	SAFE_NO = 0,
-	SAFE_NOMSAA,      // skip msaa
-	SAFE_NOACC,       // don't set acceleration flag
-	SAFE_NOSTENCIL,   // don't set stencil bits
-	SAFE_NOALPHA,     // don't set alpha bits
-	SAFE_NODEPTH,     // don't set depth bits
-	SAFE_NOCOLOR,     // don't set color bits
-	SAFE_DONTCARE     // ignore everything, let SDL/EGL decide
-} safe_context_t;
-
-
 typedef struct
 {
 	void*	context; // handle to GL rendering context
@@ -37,9 +24,10 @@ typedef struct
 
 	qboolean		initialized;	// OpenGL subsystem started
 	qboolean		extended;		// extended context allows to GL_Debug
-} glwstate_t;
 
 
+} glwstate_t;
+
 typedef struct vidstate_s
 {
 	int		width, height;
@@ -48,25 +36,8 @@ typedef struct vidstate_s
 	qboolean		wideScreen;
 } vidstate_t;
 
-// engine will manage opengl contexts with window system (egl/sdl or wgl/glx if needed)
-typedef struct glcontext_s
-{
-	/// make renderapi defs acessible here?
-//	gl_context_type_t	context;
-//	gles_wrapper_t	wrapper;
-	int		color_bits;
-	int		alpha_bits;
-	int		depth_bits;
-	int		stencil_bits;
-	int		msaasamples;
-
-	int		max_multisamples;
-} glcontext_t;
-
 extern vidstate_t vidState;
-extern glwstate_t		glw_state;
+extern glwstate_t glw_state;
-extern glcontext_t glContext;
-
 
 #define VID_MIN_HEIGHT 200
 #define VID_MIN_WIDTH 320

engine/platform/platform.h

@@ -90,6 +90,8 @@ int       R_MaxVideoModes();
 vidmode_t*R_GetVideoMode( int num );
 void*     GL_GetProcAddress( const char *name ); // RenderAPI requirement
 void      GL_UpdateSwapInterval( void );
+int GL_SetAttribute( int attr, int val );
+int GL_GetAttribute( int attr, int *val );
 
 /*
 ==============================================================================

engine/platform/sdl/vid_sdl.c

@@ -23,7 +23,6 @@ GNU General Public License for more details.
 
 static vidmode_t *vidmodes = NULL;
 static int num_vidmodes = 0;
-static int context_flags = 0;
 static void GL_SetupAttributes( void );
 
 int R_MaxVideoModes( void )
@@ -231,34 +230,13 @@ GL_CreateContext
 */
 qboolean GL_CreateContext( void )
 {
-	int colorBits[3];
-#ifdef XASH_NANOGL
-	nanoGL_Init();
-#endif
-
 	if( ( glw_state.context = SDL_GL_CreateContext( host.hWnd ) ) == NULL)
 	{
 		Con_Reportf( S_ERROR "GL_CreateContext: %s\n", SDL_GetError());
 		return GL_DeleteContext();
 	}
 
-	SDL_GL_GetAttribute( SDL_GL_RED_SIZE, &colorBits[0] );
+	ref.dllFuncs.GL_OnContextCreated();
-	SDL_GL_GetAttribute( SDL_GL_GREEN_SIZE, &colorBits[1] );
-	SDL_GL_GetAttribute( SDL_GL_BLUE_SIZE, &colorBits[2] );
-	glContext.color_bits = colorBits[0] + colorBits[1] + colorBits[2];
-
-	SDL_GL_GetAttribute( SDL_GL_ALPHA_SIZE, &glContext.alpha_bits );
-	SDL_GL_GetAttribute( SDL_GL_DEPTH_SIZE, &glContext.depth_bits );
-	SDL_GL_GetAttribute( SDL_GL_STENCIL_SIZE, &glContext.stencil_bits );
-	/// move to ref
-	//vidState.stencilEnabled = glContext.stencil_bits ? true : false;
-
-	SDL_GL_GetAttribute( SDL_GL_MULTISAMPLESAMPLES, &glContext.msaasamples );
-
-#ifdef XASH_WES
-	void wes_init();
-	wes_init();
-#endif
 
 	return true;
 }
@@ -388,7 +366,7 @@ qboolean VID_CreateWindow( int width, int height, qboolean fullscreen )
 			if( !gl_wgl_msaa_samples->value && glw_state.safe + 1 == SAFE_NOMSAA )
 				glw_state.safe += 2; // no need to skip msaa, if we already disabled it
 			else glw_state.safe++;
-			GL_SetupAttributes(); // re-choose attributes
+			GL_SetupAttributes( ); // re-choose attributes
 
 			// try again
 			return VID_CreateWindow( width, height, fullscreen );
@@ -505,132 +483,19 @@ GL_SetupAttributes
 */
 static void GL_SetupAttributes( void )
 {
-	int samples;
-
-#if !defined(_WIN32)
-	SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "1" );
-	SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "1" );
-#endif
-
 	SDL_GL_ResetAttributes();
 
-#ifdef XASH_GLES
+	ref.dllFuncs.GL_SetupAttributes( glw_state.safe );
-	SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES );
+}
-	SDL_GL_SetAttribute( SDL_GL_CONTEXT_EGL, 1 );
-#ifdef XASH_NANOGL
-	SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 1 );
-	SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 1 );
-#elif defined( XASH_WES ) || defined( XASH_REGAL )
-	SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 2 );
-	SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 0 );
-#endif
-#else // GL1.x
-#ifndef XASH_GL_STATIC
-	if( Sys_CheckParm( "-gldebug" ) )
-	{
-		Con_Reportf( "Creating an extended GL context for debug...\n" );
-		SetBits( context_flags, FCONTEXT_DEBUG_ARB );
-		SDL_GL_SetAttribute( SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_DEBUG_FLAG );
-		glw_state.extended = true;
-	}
-#endif // XASH_GL_STATIC
-	if( Sys_CheckParm( "-glcore" ))
-	{
-		SetBits( context_flags, FCONTEXT_CORE_PROFILE );
 
-		SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE );
+int GL_SetAttribute( int attr, int val )
-	}
+{
-	else
+	return SDL_GL_SetAttribute( (SDL_GLattr)attr, val );
-	{
+}
-		SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_COMPATIBILITY );
-	}
-#endif // XASH_GLES
 
-	if( glw_state.safe > SAFE_DONTCARE )
+int GL_GetAttribute( int attr, int *val )
-	{
+{
-		glw_state.safe = -1; // can't retry anymore, can only shutdown engine
+	return SDL_GL_GetAttribute( (SDL_GLattr)attr, val );
-		return;
-	}
-
-	Msg( "Trying safe opengl mode %d\n", glw_state.safe );
-
-	if( glw_state.safe == SAFE_DONTCARE )
-		return;
-
-	SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
-
-	if( glw_state.safe < SAFE_NOACC )
-		SDL_GL_SetAttribute( SDL_GL_ACCELERATED_VISUAL, 1 );
-
-	Msg( "bpp %d\n", glw_state.desktopBitsPixel );
-
-	/// ref context attribs api
-//	if( glw_state.safe < SAFE_NOSTENCIL )
-//		SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, gl_stencilbits->value );
-
-	if( glw_state.safe < SAFE_NOALPHA )
-		SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
-
-	if( glw_state.safe < SAFE_NODEPTH )
-		SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 24 );
-	else
-		SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 8 );
-
-	if( glw_state.safe < SAFE_NOCOLOR )
-	{
-		if( glw_state.desktopBitsPixel >= 24 )
-		{
-			SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
-			SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
-			SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
-		}
-		else if( glw_state.desktopBitsPixel >= 16 )
-		{
-			SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
-			SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 6 );
-			SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
-		}
-		else
-		{
-			SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 3 );
-			SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 3 );
-			SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 2 );
-		}
-	}
-
-	if( glw_state.safe < SAFE_NOMSAA )
-	{
-		switch( (int)gl_wgl_msaa_samples->value )
-		{
-		case 2:
-		case 4:
-		case 8:
-		case 16:
-			samples = gl_wgl_msaa_samples->value;
-			break;
-		default:
-			samples = 0; // don't use, because invalid parameter is passed
-		}
-
-		if( samples )
-		{
-			SDL_GL_SetAttribute( SDL_GL_MULTISAMPLEBUFFERS, 1 );
-			SDL_GL_SetAttribute( SDL_GL_MULTISAMPLESAMPLES, samples );
-
-			glContext.max_multisamples = samples;
-		}
-		else
-		{
-			SDL_GL_SetAttribute( SDL_GL_MULTISAMPLEBUFFERS, 0 );
-			SDL_GL_SetAttribute( SDL_GL_MULTISAMPLESAMPLES, 0 );
-
-			glContext.max_multisamples = 0;
-		}
-	}
-	else
-	{
-		Cvar_Set( "gl_wgl_msaa_samples", "0" );
-	}
 }
 
 #ifndef EGL_LIB
@@ -656,7 +521,13 @@ qboolean R_Init_Video( void )
 	if( !glw_state.safe && Sys_GetParmFromCmdLine( "-safegl", safe ) )
 		glw_state.safe = bound( SAFE_NO, Q_atoi( safe ), SAFE_DONTCARE );
 
-	GL_SetupAttributes();
+#if !defined(_WIN32)
+	SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "1" );
+	SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "1" );
+#endif
+
+	// refdll can request some attributes
+	GL_SetupAttributes( );
 
 	if( SDL_GL_LoadLibrary( EGL_LIB ) )
 	{
@@ -676,8 +547,11 @@ qboolean R_Init_Video( void )
 		return retval;
 	}
 
+	// refdll also can check extensions
 	ref.dllFuncs.GL_InitExtensions();
 
+	host.renderinfo_changed = false;
+
 	return true;
 }
 

engine/ref_api.h

@@ -144,6 +144,72 @@ enum ref_defaultsprite_e
 	REF_CHROME_SPRITE // cl_sprite_shell
 };
 
+enum ref_graphic_apis_e
+{
+	REF_SOFTWARE,	// hypothetical: just make a surface to draw on, in software
+	REF_GL,			// create GL context
+};
+
+typedef enum
+{
+	SAFE_NO = 0,
+	SAFE_NOMSAA,      // skip msaa
+	SAFE_NOACC,       // don't set acceleration flag
+	SAFE_NOSTENCIL,   // don't set stencil bits
+	SAFE_NOALPHA,     // don't set alpha bits
+	SAFE_NODEPTH,     // don't set depth bits
+	SAFE_NOCOLOR,     // don't set color bits
+	SAFE_DONTCARE     // ignore everything, let SDL/EGL decide
+} ref_safegl_context_t;
+
+// binary compatible with SDL2
+enum // OpenGL configuration attributes
+{
+	REF_GL_RED_SIZE,
+	REF_GL_GREEN_SIZE,
+	REF_GL_BLUE_SIZE,
+	REF_GL_ALPHA_SIZE,
+	REF_GL_BUFFER_SIZE,
+	REF_GL_DOUBLEBUFFER,
+	REF_GL_DEPTH_SIZE,
+	REF_GL_STENCIL_SIZE,
+	REF_GL_ACCUM_RED_SIZE,
+	REF_GL_ACCUM_GREEN_SIZE,
+	REF_GL_ACCUM_BLUE_SIZE,
+	REF_GL_ACCUM_ALPHA_SIZE,
+	REF_GL_STEREO,
+	REF_GL_MULTISAMPLEBUFFERS,
+	REF_GL_MULTISAMPLESAMPLES,
+	REF_GL_ACCELERATED_VISUAL,
+	REF_GL_RETAINED_BACKING,
+	REF_GL_CONTEXT_MAJOR_VERSION,
+	REF_GL_CONTEXT_MINOR_VERSION,
+	REF_GL_CONTEXT_EGL,
+	REF_GL_CONTEXT_FLAGS,
+	REF_GL_CONTEXT_PROFILE_MASK,
+	REF_GL_SHARE_WITH_CURRENT_CONTEXT,
+	REF_GL_FRAMEBUFFER_SRGB_CAPABLE,
+	REF_GL_CONTEXT_RELEASE_BEHAVIOR,
+	REF_GL_CONTEXT_RESET_NOTIFICATION,
+	REF_GL_CONTEXT_NO_ERROR
+};
+
+enum
+{
+	REF_GL_CONTEXT_PROFILE_CORE           = 0x0001,
+	REF_GL_CONTEXT_PROFILE_COMPATIBILITY  = 0x0002,
+	REF_GL_CONTEXT_PROFILE_ES             = 0x0004 /**< GLX_CONTEXT_ES2_PROFILE_BIT_EXT */
+};
+
+enum
+{
+	REF_GL_CONTEXT_DEBUG_FLAG              = 0x0001,
+	REF_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG = 0x0002,
+	REF_GL_CONTEXT_ROBUST_ACCESS_FLAG      = 0x0004,
+	REF_GL_CONTEXT_RESET_ISOLATION_FLAG    = 0x0008
+};
+
+
 struct con_nprint_s;
 struct remap_info_s;
 
@@ -260,6 +326,7 @@ typedef struct ref_api_s
 	byte *(*CL_GetPaletteColor)(int color); // clgame.palette[color]
 	void (*CL_GetScreenInfo)( int *width, int *height ); // clgame.scrInfo, ptrs may be NULL
 	void (*SetLocalLightLevel)( int level ); // cl.local.light_level
+	int (*Sys_CheckParm)( const char *flag );
 
 	// studio interface
 	player_info_t *(*pfnPlayerInfo)( int index );
@@ -289,11 +356,15 @@ typedef struct ref_api_s
 	int (*FS_FileExists)( const char *filename, int gamedironly );
 	void (*FS_AllowDirectPaths)( qboolean enable );
 
+	// video init
+	// try to create window
+	// will call GL_SetupAttributes in case of REF_GL
+	int	(*R_Init_Video)( int type );
+	void (*R_Free_Video)( void );
+
 	// GL
 	int   (*GL_SetAttribute)( int attr, int value );
-	int   (*GL_GetAttribute)( int attr );
+	int   (*GL_GetAttribute)( int attr, int *value );
-	int   (*GL_CreateContext)( void ); // TODO
-	void  (*GL_DestroyContext)( );
 	void *(*GL_GetProcAddress)( const char *name );
 
 	// gamma
@@ -347,6 +418,8 @@ typedef struct ref_interface_s
 	void (*R_Shutdown)( void );
 
 	//
+	void (*GL_SetupAttributes)( int safegl );
+	void (*GL_OnContextCreated)( void );
 	void (*GL_InitExtensions)( void );
 	void (*GL_ClearExtensions)( void );
 
@@ -528,6 +601,9 @@ typedef struct ref_interface_s
 	void	(*VGUI_UploadTexture)( int id, const char *buffer, int width, int height );
 	void	(*VGUI_UploadTextureBlock)( int id, int drawX, int drawY, const byte *rgba, int blockWidth, int blockHeight );
 	void	(*VGUI_DrawQuad)( const vpoint_t *ul, const vpoint_t *lr );
+	void	(*VGUI_GetTextureSizes)( int *width, int *height );
+	int		(*VGUI_GenerateTexture)( void );
+
 } ref_interface_t;
 
 typedef int (*REFAPI)( int version, ref_interface_t *pFunctionTable, ref_api_t* engfuncs, ref_globals_t *pGlobals );

ref_gl/gl_context.c

@@ -325,6 +325,8 @@ ref_interface_t gReffuncs =
 	R_Init,
 	R_Shutdown,
 
+	GL_SetupAttributes,
+	GL_OnContextCreated,
 	GL_InitExtensions,
 	GL_ClearExtensions,
 
@@ -471,7 +473,9 @@ ref_interface_t gReffuncs =
 	VGUI_CreateTexture,
 	VGUI_UploadTexture,
 	VGUI_UploadTextureBlock,
-	VGUI_DrawQuad
+	VGUI_DrawQuad,
+	VGUI_GetTextureSizes,
+	VGUI_GenerateTexture,
 };
 
 int GAME_EXPORT GetRefAPI( int version, ref_interface_t *funcs, ref_api_t *engfuncs, ref_globals_t *globals )

ref_gl/gl_local.h

@@ -516,6 +516,8 @@ int VGUI_GenerateTexture( void );
 //
 qboolean R_Init( void );
 void R_Shutdown( void );
+void GL_SetupAttributes( int safegl );
+void GL_OnContextCreated( void );
 void GL_InitExtensions( void );
 void GL_ClearExtensions( void );
 void VID_CheckChanges( void );
@@ -719,7 +721,6 @@ extern convar_t	*gl_extensions;
 extern convar_t	*gl_check_errors;
 extern convar_t	*gl_texture_lodbias;
 extern convar_t	*gl_texture_nearest;
-extern convar_t	*gl_wgl_msaa_samples;
 extern convar_t	*gl_lightmap_nearest;
 extern convar_t	*gl_keeptjunctions;
 extern convar_t	*gl_emboss_scale;

ref_gl/gl_opengl.c

@@ -42,7 +42,6 @@ convar_t	*gl_round_down;
 convar_t	*r_vbo;
 convar_t	*r_vbo_dlightmode;
 convar_t	*gl_showtextures;
-convar_t	*gl_wgl_msaa_samples;
 convar_t	*cl_lightstyle_lerping;
 
 convar_t	*vid_brightness;
@@ -788,7 +787,6 @@ void GL_InitCommands( void )
 	gl_clear = gEngfuncs.Cvar_Get( "gl_clear", "0", FCVAR_ARCHIVE, "clearing screen after each frame" );
 	gl_test = gEngfuncs.Cvar_Get( "gl_test", "0", 0, "engine developer cvar for quick testing new features" );
 	gl_wireframe = gEngfuncs.Cvar_Get( "gl_wireframe", "0", FCVAR_ARCHIVE|FCVAR_SPONLY, "show wireframe overlay" );
-	gl_wgl_msaa_samples = gEngfuncs.Cvar_Get( "gl_wgl_msaa_samples", "0", FCVAR_GLCONFIG, "samples number for multisample anti-aliasing" );
 	gl_msaa = gEngfuncs.Cvar_Get( "gl_msaa", "1", FCVAR_ARCHIVE, "enable or disable multisample anti-aliasing" );
 	gl_stencilbits = gEngfuncs.Cvar_Get( "gl_stencilbits", "8", FCVAR_GLCONFIG, "pixelformat stencil bits (0 - auto)" );
 	gl_round_down = gEngfuncs.Cvar_Get( "gl_round_down", "2", FCVAR_RENDERINFO, "round texture sizes to nearest POT value" );
@@ -866,6 +864,16 @@ static void R_CheckVBO( void )
 		r_vbo->flags |= FCVAR_ARCHIVE;
 }
 
+/*
+=================
+GL_RemoveCommands
+=================
+*/
+void GL_RemoveCommands( void )
+{
+	gEngfuncs.Cmd_RemoveCommand( "r_info" );
+}
+
 /*
 ===============
 R_Init
@@ -882,18 +890,15 @@ qboolean R_Init( void )
 	GL_SetDefaultState();
 
 	// create the window and set up the context
-#if 0 // REFTODO: just make it compile
+	if( !gEngfuncs.R_Init_Video( REF_GL )) // request GL context
-	if( !R_Init_Video( ))
 	{
 		GL_RemoveCommands();
-		R_Free_Video();
+		gEngfuncs.R_Free_Video();
 
 		gEngfuncs.Host_Error( "Can't initialize video subsystem\nProbably driver was not installed" );
 		return false;
 	}
 
-	host.renderinfo_changed = false;
-#endif
 	r_temppool = Mem_AllocPool( "Render Zone" );
 
 	GL_SetDefaults();
@@ -908,16 +913,6 @@ qboolean R_Init( void )
 	return true;
 }
 
-/*
-=================
-GL_RemoveCommands
-=================
-*/
-void GL_RemoveCommands( void )
-{
-	gEngfuncs.Cmd_RemoveCommand( "r_info" );
-}
-
 /*
 ===============
 R_Shutdown
@@ -933,10 +928,8 @@ void R_Shutdown( void )
 
 	Mem_FreePool( &r_temppool );
 
-#if 0 // REFTODO: just make it compile
 	// shut down OS specific OpenGL stuff like contexts, etc.
-	R_Free_Video();
+	gEngfuncs.R_Free_Video();
-#endif // 0
 }
 
 /*
@@ -985,3 +978,151 @@ void GL_CheckForErrors_( const char *filename, const int fileline )
 	gEngfuncs.Con_Printf( S_OPENGL_ERROR "%s (called at %s:%i)\n", GL_ErrorString( err ), filename, fileline );
 }
 
+void GL_SetupAttributes( int safegl )
+{
+	int context_flags = 0; // REFTODO!!!!!
+	int samples = 0;
+
+#ifdef XASH_GLES
+	gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_PROFILE_MASK, REF_GL_CONTEXT_PROFILE_ES );
+	gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_EGL, 1 );
+#ifdef XASH_NANOGL
+	gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_MAJOR_VERSION, 1 );
+	gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_MINOR_VERSION, 1 );
+#elif defined( XASH_WES ) || defined( XASH_REGAL )
+	gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_MAJOR_VERSION, 2 );
+	gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_MINOR_VERSION, 0 );
+#endif
+#else // GL1.x
+#ifndef XASH_GL_STATIC
+	if( gEngfuncs.Sys_CheckParm( "-gldebug" ) )
+	{
+		gEngfuncs.Con_Reportf( "Creating an extended GL context for debug...\n" );
+		SetBits( context_flags, FCONTEXT_DEBUG_ARB );
+		gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_FLAGS, REF_GL_CONTEXT_DEBUG_FLAG );
+		glw_state.extended = true;
+	}
+#endif // XASH_GL_STATIC
+	if( gEngfuncs.Sys_CheckParm( "-glcore" ))
+	{
+		SetBits( context_flags, FCONTEXT_CORE_PROFILE );
+
+		gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_PROFILE_MASK, REF_GL_CONTEXT_PROFILE_CORE );
+	}
+	else
+	{
+		gEngfuncs.GL_SetAttribute( REF_GL_CONTEXT_PROFILE_MASK, REF_GL_CONTEXT_PROFILE_COMPATIBILITY );
+	}
+#endif // XASH_GLES
+
+	if( safegl > SAFE_DONTCARE )
+	{
+		safegl = -1; // can't retry anymore, can only shutdown engine
+		return;
+	}
+
+	gEngfuncs.Con_Printf( "Trying safe opengl mode %d\n", safegl );
+
+	if( safegl == SAFE_DONTCARE )
+		return;
+
+	gEngfuncs.GL_SetAttribute( REF_GL_DOUBLEBUFFER, 1 );
+
+	if( safegl < SAFE_NOACC )
+		gEngfuncs.GL_SetAttribute( REF_GL_ACCELERATED_VISUAL, 1 );
+
+	gEngfuncs.Con_Printf( "bpp %d\n", glw_state.desktopBitsPixel );
+
+	if( safegl < SAFE_NOSTENCIL )
+		gEngfuncs.GL_SetAttribute( REF_GL_STENCIL_SIZE, gl_stencilbits->value );
+
+	if( safegl < SAFE_NOALPHA )
+		gEngfuncs.GL_SetAttribute( REF_GL_ALPHA_SIZE, 8 );
+
+	if( safegl < SAFE_NODEPTH )
+		gEngfuncs.GL_SetAttribute( REF_GL_DEPTH_SIZE, 24 );
+	else
+		gEngfuncs.GL_SetAttribute( REF_GL_DEPTH_SIZE, 8 );
+
+	if( safegl < SAFE_NOCOLOR )
+	{
+		if( glw_state.desktopBitsPixel >= 24 )
+		{
+			gEngfuncs.GL_SetAttribute( REF_GL_RED_SIZE, 8 );
+			gEngfuncs.GL_SetAttribute( REF_GL_GREEN_SIZE, 8 );
+			gEngfuncs.GL_SetAttribute( REF_GL_BLUE_SIZE, 8 );
+		}
+		else if( glw_state.desktopBitsPixel >= 16 )
+		{
+			gEngfuncs.GL_SetAttribute( REF_GL_RED_SIZE, 5 );
+			gEngfuncs.GL_SetAttribute( REF_GL_GREEN_SIZE, 6 );
+			gEngfuncs.GL_SetAttribute( REF_GL_BLUE_SIZE, 5 );
+		}
+		else
+		{
+			gEngfuncs.GL_SetAttribute( REF_GL_RED_SIZE, 3 );
+			gEngfuncs.GL_SetAttribute( REF_GL_GREEN_SIZE, 3 );
+			gEngfuncs.GL_SetAttribute( REF_GL_BLUE_SIZE, 2 );
+		}
+	}
+
+	if( safegl < SAFE_NOMSAA )
+	{
+		switch( (int)gEngfuncs.pfnGetCvarFloat( "gl_wgl_msaa_samples" ))
+		{
+		case 2:
+		case 4:
+		case 8:
+		case 16:
+			samples = gEngfuncs.pfnGetCvarFloat( "gl_wgl_msaa_samples" );
+			break;
+		default:
+			samples = 0; // don't use, because invalid parameter is passed
+		}
+
+		if( samples )
+		{
+			gEngfuncs.GL_SetAttribute( REF_GL_MULTISAMPLEBUFFERS, 1 );
+			gEngfuncs.GL_SetAttribute( REF_GL_MULTISAMPLESAMPLES, samples );
+
+			glConfig.max_multisamples = samples;
+		}
+		else
+		{
+			gEngfuncs.GL_SetAttribute( REF_GL_MULTISAMPLEBUFFERS, 0 );
+			gEngfuncs.GL_SetAttribute( REF_GL_MULTISAMPLESAMPLES, 0 );
+
+			glConfig.max_multisamples = 0;
+		}
+	}
+	else
+	{
+		gEngfuncs.Cvar_Set( "gl_wgl_msaa_samples", "0" );
+	}
+}
+
+void GL_OnContextCreated( void )
+{
+	int colorBits[3];
+#ifdef XASH_NANOGL
+	nanoGL_Init();
+#endif
+
+	gEngfuncs.GL_GetAttribute( REF_GL_RED_SIZE, &colorBits[0] );
+	gEngfuncs.GL_GetAttribute( REF_GL_GREEN_SIZE, &colorBits[1] );
+	gEngfuncs.GL_GetAttribute( REF_GL_BLUE_SIZE, &colorBits[2] );
+	glConfig.color_bits = colorBits[0] + colorBits[1] + colorBits[2];
+
+	gEngfuncs.GL_GetAttribute( REF_GL_ALPHA_SIZE, &glConfig.alpha_bits );
+	gEngfuncs.GL_GetAttribute( REF_GL_DEPTH_SIZE, &glConfig.depth_bits );
+	gEngfuncs.GL_GetAttribute( REF_GL_STENCIL_SIZE, &glConfig.stencil_bits );
+	glState.stencilEnabled = glConfig.stencil_bits ? true : false;
+
+	gEngfuncs.GL_GetAttribute( REF_GL_MULTISAMPLESAMPLES, &glConfig.msaasamples );
+
+#ifdef XASH_WES
+	void wes_init();
+	wes_init();
+#endif
+}
+