yquake2remaster/src/client/cl_screen.c

/*
 * Copyright (C) 1997-2001 Id Software, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * =======================================================================
 *
 * This file implements the 2D stuff. For example the HUD and the
 * networkgraph.
 *
 * =======================================================================
 */

#include "header/client.h"

float scr_con_current; /* aproaches scr_conlines at scr_conspeed */
float scr_conlines; /* 0.0 to 1.0 lines of console to display */

qboolean scr_initialized; /* ready to draw */

int scr_draw_loading;

vrect_t scr_vrect; /* position of render window on screen */

cvar_t *scr_viewsize;
cvar_t *scr_conspeed;
cvar_t *scr_centertime;
cvar_t *scr_showturtle;
cvar_t *scr_showpause;

cvar_t *scr_netgraph;
cvar_t *scr_timegraph;
cvar_t *scr_debuggraph;
cvar_t *scr_graphheight;
cvar_t *scr_graphscale;
cvar_t *scr_graphshift;
cvar_t *scr_drawall;

cvar_t *r_hudscale; /* named for consistency with R1Q2 */
cvar_t *r_consolescale;
cvar_t *r_menuscale;

typedef struct
{
	int x1, y1, x2, y2;
} dirty_t;

dirty_t scr_dirty, scr_old_dirty[2];

char crosshair_pic[MAX_QPATH];
int crosshair_width, crosshair_height;

extern cvar_t *cl_showfps;
extern cvar_t *crosshair_scale;

void SCR_TimeRefresh_f(void);
void SCR_Loading_f(void);

/*
 * A new packet was just parsed
 */
void
CL_AddNetgraph(void)
{
	int i;
	int in;
	int ping;

	/* if using the debuggraph for something
	   else, don't add the net lines */
	if (scr_debuggraph->value || scr_timegraph->value)
	{
		return;
	}

	for (i = 0; i < cls.netchan.dropped; i++)
	{
		SCR_DebugGraph(30, 0x40);
	}

	for (i = 0; i < cl.surpressCount; i++)
	{
		SCR_DebugGraph(30, 0xdf);
	}

	/* see what the latency was on this packet */
	in = cls.netchan.incoming_acknowledged & (CMD_BACKUP - 1);
	ping = cls.realtime - cl.cmd_time[in];
	ping /= 30;

	if (ping > 30)
	{
		ping = 30;
	}

	SCR_DebugGraph((float)ping, 0xd0);
}

typedef struct
{
	float value;
	int color;
} graphsamp_t;

static int current;
static graphsamp_t values[2024];

void
SCR_DebugGraph(float value, int color)
{
	values[current & 2023].value = value;
	values[current & 2023].color = color;
	current++;
}

void
SCR_DrawDebugGraph(void)
{
	int a, x, y, w, i, h;
	float v;
	int color;

	/* draw the graph */
	w = scr_vrect.width;

	x = scr_vrect.x;
	y = scr_vrect.y + scr_vrect.height;
	Draw_Fill(x, y - scr_graphheight->value,
			w, scr_graphheight->value, 8);

	for (a = 0; a < w; a++)
	{
		i = (current - 1 - a + 1024) & 1023;
		v = values[i].value;
		color = values[i].color;
		v = v * scr_graphscale->value + scr_graphshift->value;

		if (v < 0)
		{
			v += scr_graphheight->value *
				 (1 + (int)(-v / scr_graphheight->value));
		}

		h = (int)v % (int)scr_graphheight->value;
		Draw_Fill(x + w - 1 - a, y - h, 1, h, color);
	}
}

char scr_centerstring[1024];
float scr_centertime_start; /* for slow victory printing */
float scr_centertime_off;
int scr_center_lines;
int scr_erase_center;

/*
 * Called for important messages that should stay
 * in the center of the screen for a few moments
 */
void
SCR_CenterPrint(char *str)
{
	char *s;
	char line[64];
	int i, j, l;

	Q_strlcpy(scr_centerstring, str, sizeof(scr_centerstring));
	scr_centertime_off = scr_centertime->value;
	scr_centertime_start = cl.time;

	/* count the number of lines for centering */
	scr_center_lines = 1;
	s = str;

	while (*s)
	{
		if (*s == '\n')
		{
			scr_center_lines++;
		}

		s++;
	}

	/* echo it to the console */
	Com_Printf("\n\n\35\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\37\n\n");

	s = str;

	do
	{
		/* scan the width of the line */
		for (l = 0; l < 40; l++)
		{
			if ((s[l] == '\n') || !s[l])
			{
				break;
			}
		}

		for (i = 0; i < (40 - l) / 2; i++)
		{
			line[i] = ' ';
		}

		for (j = 0; j < l; j++)
		{
			line[i++] = s[j];
		}

		line[i] = '\n';
		line[i + 1] = 0;

		Com_Printf("%s", line);

		while (*s && *s != '\n')
		{
			s++;
		}

		if (!*s)
		{
			break;
		}

		s++; /* skip the \n */
	}
	while (1);

	Com_Printf("\n\n\35\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\37\n\n");
	Con_ClearNotify();
}

void
SCR_DrawCenterString(void)
{
	char *start;
	int l;
	int j;
	int x, y;
	int remaining;
	float scale;
    const int char_unscaled_width  = 8;
    const int char_unscaled_height = 8;

	/* the finale prints the characters one at a time */
	remaining = 9999;

	scr_erase_center = 0;
	start = scr_centerstring;
	scale = SCR_GetConsoleScale();

	if (scr_center_lines <= 4)
	{
		y = (viddef.height * 0.35) / scale;
	}

	else
	{
		y = 48 / scale;
	}

	do
	{
		/* scan the width of the line */
		for (l = 0; l < 40; l++)
		{
			if ((start[l] == '\n') || !start[l])
			{
				break;
			}
		}

		x = ((viddef.width / scale) - (l * char_unscaled_width)) / 2;
		SCR_AddDirtyPoint(x, y);

		for (j = 0; j < l; j++, x += char_unscaled_width)
		{
			Draw_CharScaled(x * scale, y * scale, start[j], scale);

			if (!remaining--)
			{
				return;
			}
		}

		SCR_AddDirtyPoint(x, y + char_unscaled_height);

		y += char_unscaled_height;

		while (*start && *start != '\n')
		{
			start++;
		}

		if (!*start)
		{
			break;
		}

		start++; /* skip the \n */
	}
	while (1);
}

void
SCR_CheckDrawCenterString(void)
{
	scr_centertime_off -= cls.rframetime;

	if (scr_centertime_off <= 0)
	{
		return;
	}

	SCR_DrawCenterString();
}

/*
 * Sets scr_vrect, the coordinates of the rendered window
 */
static void
SCR_CalcVrect(void)
{
	int size;

	/* bound viewsize */
	if (scr_viewsize->value < 40)
	{
		Cvar_Set("viewsize", "40");
	}

	if (scr_viewsize->value > 100)
	{
		Cvar_Set("viewsize", "100");
	}

	size = scr_viewsize->value;

	scr_vrect.width = viddef.width * size / 100;
	scr_vrect.height = viddef.height * size / 100;

	scr_vrect.x = (viddef.width - scr_vrect.width) / 2;
	scr_vrect.y = (viddef.height - scr_vrect.height) / 2;
}

/*
 * Keybinding command
 */
void
SCR_SizeUp_f(void)
{
	Cvar_SetValue("viewsize", (float)scr_viewsize->value + 10);
}

/*
 *Keybinding command
 */
void
SCR_SizeDown_f(void)
{
	Cvar_SetValue("viewsize", (float)scr_viewsize->value - 10);
}

/*
 * Set a specific sky and rotation speed
 */
void
SCR_Sky_f(void)
{
	float rotate;
	vec3_t axis;

	if (Cmd_Argc() < 2)
	{
		Com_Printf("Usage: sky <basename> <rotate> <axis x y z>\n");
		return;
	}

	if (Cmd_Argc() > 2)
	{
		rotate = (float)strtod(Cmd_Argv(2), (char **)NULL);
	}

	else
	{
		rotate = 0;
	}

	if (Cmd_Argc() == 6)
	{
		axis[0] = (float)strtod(Cmd_Argv(3), (char **)NULL);
		axis[1] = (float)strtod(Cmd_Argv(4), (char **)NULL);
		axis[2] = (float)strtod(Cmd_Argv(5), (char **)NULL);
	}
	else
	{
		axis[0] = 0;
		axis[1] = 0;
		axis[2] = 1;
	}

	R_SetSky(Cmd_Argv(1), rotate, axis);
}

void
SCR_Init(void)
{
	scr_viewsize = Cvar_Get("viewsize", "100", CVAR_ARCHIVE);
	scr_conspeed = Cvar_Get("scr_conspeed", "3", 0);
	scr_centertime = Cvar_Get("scr_centertime", "2.5", 0);
	scr_showturtle = Cvar_Get("scr_showturtle", "0", 0);
	scr_showpause = Cvar_Get("scr_showpause", "1", 0);
	scr_netgraph = Cvar_Get("netgraph", "0", 0);
	scr_timegraph = Cvar_Get("timegraph", "0", 0);
	scr_debuggraph = Cvar_Get("debuggraph", "0", 0);
	scr_graphheight = Cvar_Get("graphheight", "32", 0);
	scr_graphscale = Cvar_Get("graphscale", "1", 0);
	scr_graphshift = Cvar_Get("graphshift", "0", 0);
	scr_drawall = Cvar_Get("scr_drawall", "0", 0);
	r_hudscale = Cvar_Get("r_hudscale", "-1", CVAR_ARCHIVE);
	r_consolescale = Cvar_Get("r_consolescale", "-1", CVAR_ARCHIVE);
	r_menuscale = Cvar_Get("r_menuscale", "-1", CVAR_ARCHIVE);

	/* register our commands */
	Cmd_AddCommand("timerefresh", SCR_TimeRefresh_f);
	Cmd_AddCommand("loading", SCR_Loading_f);
	Cmd_AddCommand("sizeup", SCR_SizeUp_f);
	Cmd_AddCommand("sizedown", SCR_SizeDown_f);
	Cmd_AddCommand("sky", SCR_Sky_f);

	scr_initialized = true;
}

void
SCR_DrawNet(void)
{
	float scale = SCR_GetMenuScale();

	if (cls.netchan.outgoing_sequence - cls.netchan.incoming_acknowledged < CMD_BACKUP - 1)
	{
		return;
	}

	Draw_PicScaled(scr_vrect.x + 64 * scale, scr_vrect.y, "net", scale);
}

void
SCR_DrawPause(void)
{
	int w, h;
	float scale = SCR_GetMenuScale();

	if (!scr_showpause->value) /* turn off for screenshots */
	{
		return;
	}

	if (!cl_paused->value)
	{
		return;
	}

	Draw_GetPicSize(&w, &h, "pause");
	Draw_PicScaled((viddef.width - w * scale) / 2, viddef.height / 2 + 8 * scale, "pause", scale);
}

void
SCR_DrawLoading(void)
{
	int w, h;
	float scale = SCR_GetMenuScale();

	if (!scr_draw_loading)
	{
		return;
	}

	Draw_GetPicSize(&w, &h, "loading");
	Draw_PicScaled((viddef.width - w * scale) / 2, (viddef.height - h * scale) / 2, "loading", scale);
}

/*
 * Scroll it up or down
 */
void
SCR_RunConsole(void)
{
	/* src_conspeed must be a positiv integer,
	   otherwise things go wrong. Clamp it. */
	if (scr_conspeed->value < 0.1f)
	{
		Cvar_Set("scr_conspeed", "0.1");
	}

	/* decide on the height of the console */
	if (cls.key_dest == key_console)
	{
		scr_conlines = 0.5; /* half screen */
	}
	else
	{
		scr_conlines = 0; /* none visible */
	}

	if (scr_conlines < scr_con_current)
	{
		scr_con_current -= scr_conspeed->value * cls.rframetime;

		if (scr_conlines > scr_con_current)
		{
			scr_con_current = scr_conlines;
		}
	}
	else if (scr_conlines > scr_con_current)
	{
		scr_con_current += scr_conspeed->value * cls.rframetime;

		if (scr_conlines < scr_con_current)
		{
			scr_con_current = scr_conlines;
		}
	}
}

void
SCR_DrawConsole(void)
{
	Con_CheckResize();

	if ((cls.state == ca_disconnected) || (cls.state == ca_connecting))
	{
		/* forced full screen console */
		Con_DrawConsole(1.0);
		return;
	}

	if ((cls.state != ca_active) || !cl.refresh_prepped)
	{
		/* connected, but can't render */
		Con_DrawConsole(0.5);
		Draw_Fill(0, viddef.height / 2, viddef.width, viddef.height / 2, 0);
		return;
	}

	if (scr_con_current)
	{
		Con_DrawConsole(scr_con_current);
	}
	else
	{
		if ((cls.key_dest == key_game) || (cls.key_dest == key_message))
		{
			Con_DrawNotify(); /* only draw notify in game */
		}
	}
}

void
SCR_BeginLoadingPlaque(void)
{
	S_StopAllSounds();
	cl.sound_prepped = false; /* don't play ambients */

	OGG_Stop();

	if (cls.disable_screen)
	{
		return;
	}

	if (developer->value)
	{
		/* Hack: When we are returning here (not drawing
		   the loading plaque) we don't reset the palette
		   later on. We might end up with the cinematic
		   palette applied to the world. Enforce the world
		   palette. */
		if (cl.cinematictime > 0)
		{
			R_SetPalette(NULL);
		}

		return;
	}

	if (cls.state == ca_disconnected)
	{
		/* if at console, don't bring up the plaque */
		return;
	}

	if (cls.key_dest == key_console)
	{
		return;
	}

	if (cl.cinematictime > 0)
	{
		scr_draw_loading = 2; /* clear to balack first */
	}
	else
	{
		scr_draw_loading = 1;
	}

	SCR_UpdateScreen();

	scr_draw_loading = false;

	SCR_StopCinematic();
	cls.disable_screen = Sys_Milliseconds();
	cls.disable_servercount = cl.servercount;
}

void
SCR_EndLoadingPlaque(void)
{
	cls.disable_screen = 0;
	Con_ClearNotify();
}

void
SCR_Loading_f(void)
{
	SCR_BeginLoadingPlaque();
}

void
SCR_TimeRefresh_f(void)
{
	int i;
	int start, stop;
	float time;

	if (cls.state != ca_active)
	{
		return;
	}

	start = Sys_Milliseconds();

	if (Cmd_Argc() == 2)
	{
		/* run without page flipping */
		int j;

		for (j = 0; j < 1000; j++)
		{
			R_BeginFrame(0);

			for (i = 0; i < 128; i++)
			{
				cl.refdef.viewangles[1] = i / 128.0f * 360.0f;
				R_RenderFrame(&cl.refdef);
			}

			R_EndFrame();
		}
	}
	else
	{
		for (i = 0; i < 128; i++)
		{
			cl.refdef.viewangles[1] = i / 128.0f * 360.0f;

			R_BeginFrame(0);
			R_RenderFrame(&cl.refdef);
			R_EndFrame();
		}
	}

	stop = Sys_Milliseconds();
	time = (stop - start) / 1000.0f;
	Com_Printf("%f seconds (%f fps)\n", time, 128 / time);
}

void
SCR_AddDirtyPoint(int x, int y)
{
	if (x < scr_dirty.x1)
	{
		scr_dirty.x1 = x;
	}

	if (x > scr_dirty.x2)
	{
		scr_dirty.x2 = x;
	}

	if (y < scr_dirty.y1)
	{
		scr_dirty.y1 = y;
	}

	if (y > scr_dirty.y2)
	{
		scr_dirty.y2 = y;
	}
}

void
SCR_DirtyScreen(void)
{
	SCR_AddDirtyPoint(0, 0);
	SCR_AddDirtyPoint(viddef.width - 1, viddef.height - 1);
}

/*
 * Clear any parts of the tiled background that were drawn on last frame
 */
void
SCR_TileClear(void)
{
	int i;
	int top, bottom, left, right;
	dirty_t clear;

	if (scr_con_current == 1.0)
	{
		return; /* full screen console */
	}

	if (scr_viewsize->value == 100)
	{
		return; /* full screen rendering */
	}

	if (cl.cinematictime > 0)
	{
		return; /* full screen cinematic */
	}


	/* This highly complicated pseudo damage tracking is very effective
	   with the soft render, it gives about 10% speedup. On the GL
	   renderers the speedup is negligible, but in introduce a bug:
	   OpenGL requires to redraw the borders after every glClear(),
	   which the damage tracking doesn't take into account. Fix this
	   by not using the damage tracking when running somethinge else
	   than the soft renderer. Just redraw the borders every frame. */
	if (strcmp(vid_renderer->string, "soft") != 0) {
		// Top
		Draw_TileClear(scr_vrect.x, 0, scr_vrect.width, scr_vrect.y, "backtile");

		// Bottom
		Draw_TileClear(scr_vrect.x, scr_vrect.y + scr_vrect.height, scr_vrect.width, viddef.height, "backtile");

		// Left
		Draw_TileClear(0, 0, scr_vrect.x, viddef.height, "backtile");

		// Right
		Draw_TileClear(scr_vrect.x + scr_vrect.width, 0, viddef.width, viddef.height, "backtile");
	} else {
		/* 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 = (int)(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;
			Draw_TileClear(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;
			Draw_TileClear(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;
			Draw_TileClear(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;
			Draw_TileClear(i, clear.y1,
					clear.x2 - i + 1, clear.y2 - clear.y1 + 1, "backtile");
			clear.x2 = right;
		}
	}
}

#define STAT_MINUS 10
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

/*
 * 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
DrawHUDStringScaled(char *string, int x, int y, int centerwidth, int xor, float factor)
{
	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)*factor / 2;
		}

		else
		{
			x = margin;
		}

		for (i = 0; i < width; i++)
		{
			Draw_CharScaled(x, y, line[i] ^ xor, factor);
			x += 8*factor;
		}

		if (*string)
		{
			string++; /* skip the \n */
			y += 8*factor;
		}
	}
}

void
DrawHUDString(char *string, int x, int y, int centerwidth, int xor)
{
	DrawHUDStringScaled(string, x, y, centerwidth, xor, 1.0f);
}

void
SCR_DrawFieldScaled(int x, int y, int color, int width, int value, float factor)
{
	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)*factor, y + factor*24);

	Com_sprintf(num, sizeof(num), "%i", value);
	l = (int)strlen(num);

	if (l > width)
	{
		l = width;
	}

	x += (2 + CHAR_WIDTH * (width - l)) * factor;

	ptr = num;

	while (*ptr && l)
	{
		if (*ptr == '-')
		{
			frame = STAT_MINUS;
		}

		else
		{
			frame = *ptr - '0';
		}

		Draw_PicScaled(x, y, sb_nums[color][frame], factor);
		x += CHAR_WIDTH*factor;
		ptr++;
		l--;
	}
}

void
SCR_DrawField(int x, int y, int color, int width, int value)
{
	SCR_DrawFieldScaled(x, y, color, width, value, 1.0f);
}

/*
 * 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++)
		{
			Draw_FindPic(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));
		Draw_GetPicSize(&crosshair_width, &crosshair_height, crosshair_pic);

		if (!crosshair_width)
		{
			crosshair_pic[0] = 0;
		}
	}
}

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

	float scale = SCR_GetHUDScale();

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

	if (!s[0])
	{
		return;
	}

	x = 0;
	y = 0;

	while (s)
	{
		token = COM_Parse(&s);

		if (!strcmp(token, "xl"))
		{
			token = COM_Parse(&s);
			x = scale*(int)strtol(token, (char **)NULL, 10);
			continue;
		}

		if (!strcmp(token, "xr"))
		{
			token = COM_Parse(&s);
			x = viddef.width + scale*(int)strtol(token, (char **)NULL, 10);
			continue;
		}

		if (!strcmp(token, "xv"))
		{
			token = COM_Parse(&s);
			x = viddef.width / 2 - scale*160 + scale*(int)strtol(token, (char **)NULL, 10);
			continue;
		}

		if (!strcmp(token, "yt"))
		{
			token = COM_Parse(&s);
			y = scale*(int)strtol(token, (char **)NULL, 10);
			continue;
		}

		if (!strcmp(token, "yb"))
		{
			token = COM_Parse(&s);
			y = viddef.height + scale*(int)strtol(token, (char **)NULL, 10);
			continue;
		}

		if (!strcmp(token, "yv"))
		{
			token = COM_Parse(&s);
			y = viddef.height / 2 - scale*120 + scale*(int)strtol(token, (char **)NULL, 10);
			continue;
		}

		if (!strcmp(token, "pic"))
		{
			/* draw a pic from a stat number */
			token = COM_Parse(&s);
			index = (int)strtol(token, (char **)NULL, 10);

			if ((index < 0) || (index >= sizeof(cl.frame.playerstate.stats)))
			{
				Com_Error(ERR_DROP, "bad stats index %d (0x%x)", index, index);
			}

			value = cl.frame.playerstate.stats[index];

			if (value >= MAX_IMAGES)
			{
				Com_Error(ERR_DROP, "Pic >= MAX_IMAGES");
			}

			if (cl.configstrings[CS_IMAGES + value][0] != '\0')
			{
				SCR_AddDirtyPoint(x, y);
				SCR_AddDirtyPoint(x + 23*scale, y + 23*scale);
				Draw_PicScaled(x, y, cl.configstrings[CS_IMAGES + value], scale);
			}

			continue;
		}

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

			token = COM_Parse(&s);
			x = viddef.width / 2 - scale*160 + scale*(int)strtol(token, (char **)NULL, 10);
			token = COM_Parse(&s);
			y = viddef.height / 2 - scale*120 + scale*(int)strtol(token, (char **)NULL, 10);
			SCR_AddDirtyPoint(x, y);
			SCR_AddDirtyPoint(x + scale*159, y + scale*31);

			token = COM_Parse(&s);
			value = (int)strtol(token, (char **)NULL, 10);

			if ((value >= MAX_CLIENTS) || (value < 0))
			{
				Com_Error(ERR_DROP, "client >= MAX_CLIENTS");
			}

			ci = &cl.clientinfo[value];

			token = COM_Parse(&s);
			score = (int)strtol(token, (char **)NULL, 10);

			token = COM_Parse(&s);
			ping = (int)strtol(token, (char **)NULL, 10);

			token = COM_Parse(&s);
			time = (int)strtol(token, (char **)NULL, 10);

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

			if (!ci->icon)
			{
				ci = &cl.baseclientinfo;
			}

			Draw_PicScaled(x, y, ci->iconname, scale);
			continue;
		}

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

			token = COM_Parse(&s);
			x = viddef.width / 2 - scale*160 + scale*(int)strtol(token, (char **)NULL, 10);
			token = COM_Parse(&s);
			y = viddef.height / 2 - scale*120 + scale*(int)strtol(token, (char **)NULL, 10);
			SCR_AddDirtyPoint(x, y);
			SCR_AddDirtyPoint(x + scale*159, y + scale*31);

			token = COM_Parse(&s);
			value = (int)strtol(token, (char **)NULL, 10);

			if ((value >= MAX_CLIENTS) || (value < 0))
			{
				Com_Error(ERR_DROP, "client >= MAX_CLIENTS");
			}

			ci = &cl.clientinfo[value];

			token = COM_Parse(&s);
			score = (int)strtol(token, (char **)NULL, 10);

			token = COM_Parse(&s);
			ping = (int)strtol(token, (char **)NULL, 10);

			if (ping > 999)
			{
				ping = 999;
			}

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

			if (value == cl.playernum)
			{
				DrawAltStringScaled(x, y, block, scale);
			}

			else
			{
				DrawStringScaled(x, y, block, scale);
			}

			continue;
		}

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

		if (!strcmp(token, "num"))
		{
			/* draw a number */
			token = COM_Parse(&s);
			width = (int)strtol(token, (char **)NULL, 10);
			token = COM_Parse(&s);
			value = cl.frame.playerstate.stats[(int)strtol(token, (char **)NULL, 10)];
			SCR_DrawFieldScaled(x, y, 0, width, value, scale);
			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)
			{
				Draw_PicScaled(x, y, "field_3", scale);
			}

			SCR_DrawFieldScaled(x, y, color, width, value, scale);
			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)
			{
				Draw_PicScaled(x, y, "field_3", scale);
			}

			SCR_DrawFieldScaled(x, y, color, width, value, scale);
			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)
			{
				Draw_PicScaled(x, y, "field_3", scale);
			}

			SCR_DrawFieldScaled(x, y, color, width, value, scale);
			continue;
		}

		if (!strcmp(token, "stat_string"))
		{
			token = COM_Parse(&s);
			index = (int)strtol(token, (char **)NULL, 10);

			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");
			}

			DrawStringScaled(x, y, cl.configstrings[index], scale);
			continue;
		}

		if (!strcmp(token, "cstring"))
		{
			token = COM_Parse(&s);
			DrawHUDStringScaled(token, x, y, 320, 0, scale); // FIXME: or scale 320 here?
			continue;
		}

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

		if (!strcmp(token, "cstring2"))
		{
			token = COM_Parse(&s);
			DrawHUDStringScaled(token, x, y, 320, 0x80, scale); // FIXME: or scale 320 here?
			continue;
		}

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

		if (!strcmp(token, "if"))
		{
			/* draw a number */
			token = COM_Parse(&s);
			value = cl.frame.playerstate.stats[(int)strtol(token, (char **)NULL, 10)];

			if (!value)
			{
				/* skip to endif */
				while (s && strcmp(token, "endif"))
				{
					token = COM_Parse(&s);
				}
			}

			continue;
		}
	}
}

/*
 * 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]);
}

#define STAT_LAYOUTS 13

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

	SCR_ExecuteLayoutString(cl.layout);
}

// ----

void
SCR_Framecounter(void) {
	long long newtime;
	static int frame;
	static int frametimes[60] = {0};
	static long long oldtime;

	/* skip statistics without show fps */
	if (cl_showfps->value < 1)
		return;

	newtime = Sys_Microseconds();
	frametimes[frame] = (int)(newtime - oldtime);

	oldtime = newtime;
	frame++;
	if (frame > 59) {
		frame = 0;
	}

	float scale = SCR_GetConsoleScale();

	if (cl_showfps->value == 1) {
		// Calculate average of frames.
		int avg = 0;
		int num = 0;

		for (int i = 0; i < 60; i++) {
			if (frametimes[i] != 0) {
				avg += frametimes[i];
				num++;
			}
		}


		char str[10];
		snprintf(str, sizeof(str), "%3.2ffps", (1000.0 * 1000.0) / (avg / num));
		DrawStringScaled(viddef.width - scale*(strlen(str)*8 + 2), 0, str, scale);
		SCR_AddDirtyPoint(viddef.width - scale*(strlen(str)*8 + 2), 0);
		SCR_AddDirtyPoint(viddef.width, 0);
	} else if (cl_showfps->value >= 2) {
		// Calculate average of frames.
		int avg = 0;
		int num = 0;

		for (int i = 0; i < 60; i++) {
			if (frametimes[i] != 0) {
				avg += frametimes[i];
				num++;
			}
		}


		// Find lowest and highest
		int min = frametimes[0];
		int max = frametimes[1];

		for (int i = 1; i < 60; i++) {
			if ((frametimes[i] > 0) &&  (min < frametimes[i])) {
				min = frametimes[i];
			}

			if ((frametimes[i] > 0) && (max > frametimes[i])) {
				max = frametimes[i];
			}
		}

		char str[64];
		snprintf(str, sizeof(str), "Min: %7.2ffps, Max: %7.2ffps, Avg: %7.2ffps",
		         (1000.0 * 1000.0) / min, (1000.0 * 1000.0) / max, (1000.0 * 1000.0) / (avg / num));
		DrawStringScaled(viddef.width - scale*(strlen(str)*8 + 2), 0, str, scale);
		SCR_AddDirtyPoint(viddef.width - scale*(strlen(str)*8 + 2), 0);
		SCR_AddDirtyPoint(viddef.width, 0);

		if (cl_showfps->value > 2)
		{
			snprintf(str, sizeof(str), "Max: %5.2fms, Min: %5.2fms, Avg: %5.2fms",
			         0.001f*min, 0.001f*max, 0.001f*(avg / num));
			DrawStringScaled(viddef.width - scale*(strlen(str)*8 + 2), scale*10, str, scale);
			SCR_AddDirtyPoint(viddef.width - scale*(strlen(str)*8 + 2), scale*10);
			SCR_AddDirtyPoint(viddef.width, scale+10);
		}
	}
}

// ----
/*
 * 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};
	float scale = SCR_GetMenuScale();

	/* 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 */
	}

	if ( gl1_stereo->value )
	{
		numframes = 2;
		separation[0] = -gl1_stereo_separation->value / 2;
		separation[1] = +gl1_stereo_separation->value / 2;
	}
	else
	{
		separation[0] = 0;
		separation[1] = 0;
		numframes = 1;
	}

	for (i = 0; i < numframes; i++)
	{
		R_BeginFrame(separation[i]);

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

			R_EndWorldRenderpass();
			if(i == 0){
				R_SetPalette(NULL);
			}

			if(i == numframes - 1){
				scr_draw_loading = false;
			}

			Draw_GetPicSize(&w, &h, "loading");
			Draw_PicScaled((viddef.width - w * scale) / 2, (viddef.height - h * scale) / 2, "loading", scale);
		}

		/* 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)
				{
					R_SetPalette(NULL);
					cl.cinematicpalette_active = false;
				}

				R_EndWorldRenderpass();
				M_Draw();
			}
			else if (cls.key_dest == key_console)
			{
				if (cl.cinematicpalette_active)
				{
					R_SetPalette(NULL);
					cl.cinematicpalette_active = false;
				}

				R_EndWorldRenderpass();
				SCR_DrawConsole();
			}
			else
			{
				R_EndWorldRenderpass();
				SCR_DrawCinematic();
			}
		}
		else
		{
			/* make sure the game palette is active */
			if (cl.cinematicpalette_active)
			{
				R_SetPalette(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.rframetime * 300, 0);
			}

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

			SCR_DrawPause();

			SCR_DrawConsole();

			M_Draw();

			SCR_DrawLoading();
		}
	}

	SCR_Framecounter();
	R_EndFrame();
}

static float
SCR_ClampScale(float scale)
{
	float f;

	f = viddef.width / 320.0f;
	if (scale > f)
	{
		scale = f;
	}

	f = viddef.height / 240.0f;
	if (scale > f)
	{
		scale = f;
	}

	if (scale < 1)
	{
		scale = 1;
	}

	return scale;
}

static float
SCR_GetDefaultScale(void)
{
	int i = viddef.width / 640;
	int j = viddef.height / 240;

	if (i > j)
	{
		i = j;
	}
	if (i < 1)
	{
		i = 1;
	}

	return i;
}

void
SCR_DrawCrosshair(void)
{
	float scale;

	if (!crosshair->value)
	{
		return;
	}

	if (crosshair->modified)
	{
		crosshair->modified = false;
		SCR_TouchPics();
	}

	if (!crosshair_pic[0])
	{
		return;
	}

	if (crosshair_scale->value < 0)
	{
		scale = SCR_GetDefaultScale();
	}
	else
	{
		scale = SCR_ClampScale(crosshair_scale->value);
	}

	Draw_PicScaled(scr_vrect.x + (scr_vrect.width - crosshair_width * scale) / 2,
			scr_vrect.y + (scr_vrect.height - crosshair_height * scale) / 2,
			crosshair_pic, scale);
}

float
SCR_GetHUDScale(void)
{
	float scale;

	if (!scr_initialized)
	{
		scale = 1;
	}
	else if (r_hudscale->value < 0)
	{
		scale = SCR_GetDefaultScale();
	}
	else if (r_hudscale->value == 0) /* HACK: allow scale 0 to hide the HUD */
	{
		scale = 0;
	}
	else
	{
		scale = SCR_ClampScale(r_hudscale->value);
	}

	return scale;
}

float
SCR_GetConsoleScale(void)
{
	float scale;

	if (!scr_initialized)
	{
		scale = 1;
	}
	else if (r_consolescale->value < 0)
	{
		scale = SCR_GetDefaultScale();
	}
	else
	{
		scale = SCR_ClampScale(r_consolescale->value);
	}

	return scale;
}

float
SCR_GetMenuScale(void)
{
	float scale;

	if (!scr_initialized)
	{
		scale = 1;
	}
	else if (r_menuscale->value < 0)
	{
		scale = SCR_GetDefaultScale();
	}
	else
	{
		scale = SCR_ClampScale(r_menuscale->value);
	}

	return scale;
}