cl_scrn.c

著名游戏quake2原代码最新版本(vc6.0可以编译的)

	if (scr_viewsize->value == 100)
		return;		// full screen rendering
	if (cl.cinematictime > 0)
		return;		// full screen cinematic

	// erase rect will be the union of the past three frames
	// so tripple buffering works properly
	clear = scr_dirty;
	for (i=0 ; i<2 ; i++)
	{
		if (scr_old_dirty[i].x1 < clear.x1)
			clear.x1 = scr_old_dirty[i].x1;
		if (scr_old_dirty[i].x2 > clear.x2)
			clear.x2 = scr_old_dirty[i].x2;
		if (scr_old_dirty[i].y1 < clear.y1)
			clear.y1 = scr_old_dirty[i].y1;
		if (scr_old_dirty[i].y2 > clear.y2)
			clear.y2 = scr_old_dirty[i].y2;
	}

	scr_old_dirty[1] = scr_old_dirty[0];
	scr_old_dirty[0] = scr_dirty;

	scr_dirty.x1 = 9999;
	scr_dirty.x2 = -9999;
	scr_dirty.y1 = 9999;
	scr_dirty.y2 = -9999;

	// don't bother with anything convered by the console)
	top = scr_con_current*viddef.height;
	if (top >= clear.y1)
		clear.y1 = top;

	if (clear.y2 <= clear.y1)
		return;		// nothing disturbed

	top = scr_vrect.y;
	bottom = top + scr_vrect.height-1;
	left = scr_vrect.x;
	right = left + scr_vrect.width-1;

	if (clear.y1 < top)
	{	// clear above view screen
		i = clear.y2 < top-1 ? clear.y2 : top-1;
		re.DrawTileClear (clear.x1 , clear.y1,
			clear.x2 - clear.x1 + 1, i - clear.y1+1, "backtile");
		clear.y1 = top;
	}
	if (clear.y2 > bottom)
	{	// clear below view screen
		i = clear.y1 > bottom+1 ? clear.y1 : bottom+1;
		re.DrawTileClear (clear.x1, i,
			clear.x2-clear.x1+1, clear.y2-i+1, "backtile");
		clear.y2 = bottom;
	}
	if (clear.x1 < left)
	{	// clear left of view screen
		i = clear.x2 < left-1 ? clear.x2 : left-1;
		re.DrawTileClear (clear.x1, clear.y1,
			i-clear.x1+1, clear.y2 - clear.y1 + 1, "backtile");
		clear.x1 = left;
	}
	if (clear.x2 > right)
	{	// clear left of view screen
		i = clear.x1 > right+1 ? clear.x1 : right+1;
		re.DrawTileClear (i, clear.y1,
			clear.x2-i+1, clear.y2 - clear.y1 + 1, "backtile");
		clear.x2 = right;
	}

}


//===============================================================


#define STAT_MINUS		10	// num frame for '-' stats digit
char		*sb_nums[2][11] = 
{
	{"num_0", "num_1", "num_2", "num_3", "num_4", "num_5",
	"num_6", "num_7", "num_8", "num_9", "num_minus"},
	{"anum_0", "anum_1", "anum_2", "anum_3", "anum_4", "anum_5",
	"anum_6", "anum_7", "anum_8", "anum_9", "anum_minus"}
};

#define	ICON_WIDTH	24
#define	ICON_HEIGHT	24
#define	CHAR_WIDTH	16
#define	ICON_SPACE	8



/*
================
SizeHUDString

Allow embedded \n in the string
================
*/
void SizeHUDString (char *string, int *w, int *h)
{
	int		lines, width, current;

	lines = 1;
	width = 0;

	current = 0;
	while (*string)
	{
		if (*string == '\n')
		{
			lines++;
			current = 0;
		}
		else
		{
			current++;
			if (current > width)
				width = current;
		}
		string++;
	}

	*w = width * 8;
	*h = lines * 8;
}

void DrawHUDString (char *string, int x, int y, int centerwidth, int xor)
{
	int		margin;
	char	line[1024];
	int		width;
	int		i;

	margin = x;

	while (*string)
	{
		// scan out one line of text from the string
		width = 0;
		while (*string && *string != '\n')
			line[width++] = *string++;
		line[width] = 0;

		if (centerwidth)
			x = margin + (centerwidth - width*8)/2;
		else
			x = margin;
		for (i=0 ; i<width ; i++)
		{
			re.DrawChar (x, y, line[i]^xor);
			x += 8;
		}
		if (*string)
		{
			string++;	// skip the \n
			x = margin;
			y += 8;
		}
	}
}


/*
==============
SCR_DrawField
==============
*/
void SCR_DrawField (int x, int y, int color, int width, int value)
{
	char	num[16], *ptr;
	int		l;
	int		frame;

	if (width < 1)
		return;

	// draw number string
	if (width > 5)
		width = 5;

	SCR_AddDirtyPoint (x, y);
	SCR_AddDirtyPoint (x+width*CHAR_WIDTH+2, y+23);

	Com_sprintf (num, sizeof(num), "%i", value);
	l = strlen(num);
	if (l > width)
		l = width;
	x += 2 + CHAR_WIDTH*(width - l);

	ptr = num;
	while (*ptr && l)
	{
		if (*ptr == '-')
			frame = STAT_MINUS;
		else
			frame = *ptr -'0';

		re.DrawPic (x,y,sb_nums[color][frame]);
		x += CHAR_WIDTH;
		ptr++;
		l--;
	}
}


/*
===============
SCR_TouchPics

Allows rendering code to cache all needed sbar graphics
===============
*/
void SCR_TouchPics (void)
{
	int		i, j;

	for (i=0 ; i<2 ; i++)
		for (j=0 ; j<11 ; j++)
			re.RegisterPic (sb_nums[i][j]);

	if (crosshair->value)
	{
		if (crosshair->value > 3 || crosshair->value < 0)
			crosshair->value = 3;

		Com_sprintf (crosshair_pic, sizeof(crosshair_pic), "ch%i", (int)(crosshair->value));
		re.DrawGetPicSize (&crosshair_width, &crosshair_height, crosshair_pic);
		if (!crosshair_width)
			crosshair_pic[0] = 0;
	}
}

/*
================
SCR_ExecuteLayoutString 

================
*/
void SCR_ExecuteLayoutString (char *s)
{
	int		x, y;
	int		value;
	char	*token;
	int		width;
	int		index;
	clientinfo_t	*ci;

	if (cls.state != ca_active || !cl.refresh_prepped)
		return;

	if (!s[0])
		return;

	x = 0;
	y = 0;
	width = 3;

	while (s)
	{
		token = COM_Parse (&s);
		if (!strcmp(token, "xl"))
		{
			token = COM_Parse (&s);
			x = atoi(token);
			continue;
		}
		if (!strcmp(token, "xr"))
		{
			token = COM_Parse (&s);
			x = viddef.width + atoi(token);
			continue;
		}
		if (!strcmp(token, "xv"))
		{
			token = COM_Parse (&s);
			x = viddef.width/2 - 160 + atoi(token);
			continue;
		}

		if (!strcmp(token, "yt"))
		{
			token = COM_Parse (&s);
			y = atoi(token);
			continue;
		}
		if (!strcmp(token, "yb"))
		{
			token = COM_Parse (&s);
			y = viddef.height + atoi(token);
			continue;
		}
		if (!strcmp(token, "yv"))
		{
			token = COM_Parse (&s);
			y = viddef.height/2 - 120 + atoi(token);
			continue;
		}

		if (!strcmp(token, "pic"))
		{	// draw a pic from a stat number
			token = COM_Parse (&s);
			value = cl.frame.playerstate.stats[atoi(token)];
			if (value >= MAX_IMAGES)
				Com_Error (ERR_DROP, "Pic >= MAX_IMAGES");
			if (cl.configstrings[CS_IMAGES+value])
			{
				SCR_AddDirtyPoint (x, y);
				SCR_AddDirtyPoint (x+23, y+23);
				re.DrawPic (x, y, cl.configstrings[CS_IMAGES+value]);
			}
			continue;
		}

		if (!strcmp(token, "client"))
		{	// draw a deathmatch client block
			int		score, ping, time;

			token = COM_Parse (&s);
			x = viddef.width/2 - 160 + atoi(token);
			token = COM_Parse (&s);
			y = viddef.height/2 - 120 + atoi(token);
			SCR_AddDirtyPoint (x, y);
			SCR_AddDirtyPoint (x+159, y+31);

			token = COM_Parse (&s);
			value = atoi(token);
			if (value >= MAX_CLIENTS || value < 0)
				Com_Error (ERR_DROP, "client >= MAX_CLIENTS");
			ci = &cl.clientinfo[value];

			token = COM_Parse (&s);
			score = atoi(token);

			token = COM_Parse (&s);
			ping = atoi(token);

			token = COM_Parse (&s);
			time = atoi(token);

			DrawAltString (x+32, y, ci->name);
			DrawString (x+32, y+8,  "Score: ");
			DrawAltString (x+32+7*8, y+8,  va("%i", score));
			DrawString (x+32, y+16, va("Ping:  %i", ping));
			DrawString (x+32, y+24, va("Time:  %i", time));

			if (!ci->icon)
				ci = &cl.baseclientinfo;
			re.DrawPic (x, y, ci->iconname);
			continue;
		}

		if (!strcmp(token, "ctf"))
		{	// draw a ctf client block
			int		score, ping;
			char	block[80];

			token = COM_Parse (&s);
			x = viddef.width/2 - 160 + atoi(token);
			token = COM_Parse (&s);
			y = viddef.height/2 - 120 + atoi(token);
			SCR_AddDirtyPoint (x, y);
			SCR_AddDirtyPoint (x+159, y+31);

			token = COM_Parse (&s);
			value = atoi(token);
			if (value >= MAX_CLIENTS || value < 0)
				Com_Error (ERR_DROP, "client >= MAX_CLIENTS");
			ci = &cl.clientinfo[value];

			token = COM_Parse (&s);
			score = atoi(token);

			token = COM_Parse (&s);
			ping = atoi(token);
			if (ping > 999)
				ping = 999;

			sprintf(block, "%3d %3d %-12.12s", score, ping, ci->name);

			if (value == cl.playernum)
				DrawAltString (x, y, block);
			else
				DrawString (x, y, block);
			continue;
		}

		if (!strcmp(token, "picn"))
		{	// draw a pic from a name
			token = COM_Parse (&s);
			SCR_AddDirtyPoint (x, y);
			SCR_AddDirtyPoint (x+23, y+23);
			re.DrawPic (x, y, token);
			continue;
		}

		if (!strcmp(token, "num"))
		{	// draw a number
			token = COM_Parse (&s);
			width = atoi(token);
			token = COM_Parse (&s);
			value = cl.frame.playerstate.stats[atoi(token)];
			SCR_DrawField (x, y, 0, width, value);
			continue;
		}

		if (!strcmp(token, "hnum"))
		{	// health number
			int		color;

			width = 3;
			value = cl.frame.playerstate.stats[STAT_HEALTH];
			if (value > 25)
				color = 0;	// green
			else if (value > 0)
				color = (cl.frame.serverframe>>2) & 1;		// flash
			else
				color = 1;

			if (cl.frame.playerstate.stats[STAT_FLASHES] & 1)
				re.DrawPic (x, y, "field_3");

			SCR_DrawField (x, y, color, width, value);
			continue;
		}

		if (!strcmp(token, "anum"))
		{	// ammo number
			int		color;

			width = 3;
			value = cl.frame.playerstate.stats[STAT_AMMO];
			if (value > 5)
				color = 0;	// green
			else if (value >= 0)
				color = (cl.frame.serverframe>>2) & 1;		// flash
			else
				continue;	// negative number = don't show

			if (cl.frame.playerstate.stats[STAT_FLASHES] & 4)
				re.DrawPic (x, y, "field_3");

			SCR_DrawField (x, y, color, width, value);
			continue;
		}

		if (!strcmp(token, "rnum"))
		{	// armor number
			int		color;

			width = 3;
			value = cl.frame.playerstate.stats[STAT_ARMOR];
			if (value < 1)
				continue;

			color = 0;	// green

			if (cl.frame.playerstate.stats[STAT_FLASHES] & 2)
				re.DrawPic (x, y, "field_3");

			SCR_DrawField (x, y, color, width, value);
			continue;
		}


		if (!strcmp(token, "stat_string"))
		{
			token = COM_Parse (&s);
			index = atoi(token);
			if (index < 0 || index >= MAX_CONFIGSTRINGS)
				Com_Error (ERR_DROP, "Bad stat_string index");
			index = cl.frame.playerstate.stats[index];
			if (index < 0 || index >= MAX_CONFIGSTRINGS)
				Com_Error (ERR_DROP, "Bad stat_string index");
			DrawString (x, y, cl.configstrings[index]);
			continue;
		}

		if (!strcmp(token, "cstring"))
		{
			token = COM_Parse (&s);
			DrawHUDString (token, x, y, 320, 0);
			continue;
		}

		if (!strcmp(token, "string"))
		{
			token = COM_Parse (&s);
			DrawString (x, y, token);
			continue;
		}

		if (!strcmp(token, "cstring2"))
		{
			token = COM_Parse (&s);
			DrawHUDString (token, x, y, 320,0x80);
			continue;
		}

		if (!strcmp(token, "string2"))
		{
			token = COM_Parse (&s);
			DrawAltString (x, y, token);
			continue;
		}

		if (!strcmp(token, "if"))
		{	// draw a number
			token = COM_Parse (&s);
			value = cl.frame.playerstate.stats[atoi(token)];
			if (!value)
			{	// skip to endif
				while (s && strcmp(token, "endif") )
				{
					token = COM_Parse (&s);
				}
			}

			continue;
		}


	}
}


/*
================
SCR_DrawStats

The status bar is a small layout program that
is based on the stats array
================
*/
void SCR_DrawStats (void)
{
	SCR_ExecuteLayoutString (cl.configstrings[CS_STATUSBAR]);
}


/*
================
SCR_DrawLayout

================
*/
#define	STAT_LAYOUTS		13

void SCR_DrawLayout (void)
{
	if (!cl.frame.playerstate.stats[STAT_LAYOUTS])
		return;
	SCR_ExecuteLayoutString (cl.layout);
}

//=======================================================

/*
==================
SCR_UpdateScreen

This is called every frame, and can also be called explicitly to flush
text to the screen.
==================
*/
void SCR_UpdateScreen (void)
{
	int numframes;
	int i;
	float separation[2] = { 0, 0 };

	// if the screen is disabled (loading plaque is up, or vid mode changing)
	// do nothing at all
	if (cls.disable_screen)
	{
		if (Sys_Milliseconds() - cls.disable_screen > 120000)
		{
			cls.disable_screen = 0;
			Com_Printf ("Loading plaque timed out.\n");
		}
		return;
	}

	if (!scr_initialized || !con.initialized)
		return;				// not initialized yet

	/*
	** range check cl_camera_separation so we don't inadvertently fry someone's
	** brain
	*/
	if ( cl_stereo_separation->value > 1.0 )
		Cvar_SetValue( "cl_stereo_separation", 1.0 );
	else if ( cl_stereo_separation->value < 0 )
		Cvar_SetValue( "cl_stereo_separation", 0.0 );

	if ( cl_stereo->value )
	{
		numframes = 2;
		separation[0] = -cl_stereo_separation->value / 2;
		separation[1] =  cl_stereo_separation->value / 2;
	}		
	else
	{
		separation[0] = 0;
		separation[1] = 0;
		numframes = 1;
	}

	for ( i = 0; i < numframes; i++ )
	{
		re.BeginFrame( separation[i] );

		if (scr_draw_loading == 2)
		{	//  loading plaque over black screen
			int		w, h;

			re.CinematicSetPalette(NULL);
			scr_draw_loading = false;
			re.DrawGetPicSize (&w, &h, "loading");
			re.DrawPic ((viddef.width-w)/2, (viddef.height-h)/2, "loading");
//			re.EndFrame();
//			return;
		} 
		// if a cinematic is supposed to be running, handle menus
		// and console specially
		else if (cl.cinematictime > 0)
		{
			if (cls.key_dest == key_menu)
			{
				if (cl.cinematicpalette_active)
				{
					re.CinematicSetPalette(NULL);
					cl.cinematicpalette_active = false;
				}
				M_Draw ();
//				re.EndFrame();
//				return;
			}
			else if (cls.key_dest == key_console)
			{
				if (cl.cinematicpalette_active)
				{
					re.CinematicSetPalette(NULL);
					cl.cinematicpalette_active = false;
				}
				SCR_DrawConsole ();
//				re.EndFrame();
//				return;
			}
			else
			{
				SCR_DrawCinematic();
//				re.EndFrame();
//				return;
			}
		}
		else 
		{

			// make sure the game palette is active
			if (cl.cinematicpalette_active)
			{
				re.CinematicSetPalette(NULL);
				cl.cinematicpalette_active = false;
			}

			// do 3D refresh drawing, and then update the screen
			SCR_CalcVrect ();

			// clear any dirty part of the background
			SCR_TileClear ();

			V_RenderView ( separation[i] );

			SCR_DrawStats ();
			if (cl.frame.playerstate.stats[STAT_LAYOUTS] & 1)
				SCR_DrawLayout ();
			if (cl.frame.playerstate.stats[STAT_LAYOUTS] & 2)
				CL_DrawInventory ();

			SCR_DrawNet ();
			SCR_CheckDrawCenterString ();

			if (scr_timegraph->value)
				SCR_DebugGraph (cls.frametime*300, 0);

			if (scr_debuggraph->value || scr_timegraph->value || scr_netgraph->value)
				SCR_DrawDebugGraph ();

			SCR_DrawPause ();

			SCR_DrawConsole ();

			M_Draw ();

			SCR_DrawLoading ();
		}
	}
	re.EndFrame();
}