gl_screen.c

quake1 dos源代码最新版本

/*
Copyright (C) 1996-1997 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.

*/

// screen.c -- master for refresh, status bar, console, chat, notify, etc

#include "quakedef.h"

/*

background clear
rendering
turtle/net/ram icons
sbar
centerprint / slow centerprint
notify lines
intermission / finale overlay
loading plaque
console
menu

required background clears
required update regions


syncronous draw mode or async
One off screen buffer, with updates either copied or xblited
Need to double buffer?


async draw will require the refresh area to be cleared, because it will be
xblited, but sync draw can just ignore it.

sync
draw

CenterPrint ()
SlowPrint ()
Screen_Update ();
Con_Printf ();

net
turn off messages option

the refresh is always rendered, unless the console is full screen


console is:
	notify lines
	half
	full


*/


int			glx, gly, glwidth, glheight;

// only the refresh window will be updated unless these variables are flagged
int			scr_copytop;
int			scr_copyeverything;

float		scr_con_current;
float		scr_conlines;		// lines of console to display

float		oldscreensize, oldfov;
cvar_t		*scr_viewsize;
cvar_t		*scr_fov;			// 10 - 170
cvar_t		*scr_conspeed;
cvar_t		*scr_centertime;
cvar_t		*scr_showram;
cvar_t		*scr_showturtle;
cvar_t		*scr_showpause;
cvar_t		*scr_printspeed;
cvar_t		*gl_triplebuffer;
cvar_t		*scr_conheight;		// 2000-01-12 Variable console height by Fett

extern cvar_t	*crosshair;

qboolean	scr_initialized;		// ready to draw

qpic_t		*scr_ram;
qpic_t		*scr_net;
qpic_t		*scr_turtle;

int			scr_fullupdate;

int			clearconsole;
int			clearnotify;

int			sb_lines;

viddef_t	vid;				// global video state

vrect_t		scr_vrect;

qboolean	scr_disabled_for_loading;
qboolean	scr_drawloading;
float		scr_disabled_time;

qboolean	block_drawing;

void SCR_ScreenShot_f (void);

/*
===============================================================================

CENTER PRINTING

===============================================================================
*/

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

/*
==============
SCR_CenterPrint

Called for important messages that should stay in the center of the screen
for a few moments
==============
*/
void SCR_CenterPrint (char *str)
{
	strncpy (scr_centerstring, str, sizeof(scr_centerstring)-1);
	scr_centertime_off = scr_centertime->value;
	scr_centertime_start = cl.time;

// count the number of lines for centering
	scr_center_lines = 1;
	while (*str)
	{
		if (*str == '\n')
			scr_center_lines++;
		str++;
	}
}


void SCR_DrawCenterString (void)
{
	char	*start;
	int		l;
	int		j;
	int		x, y;
	int		remaining;

// the finale prints the characters one at a time
	if (cl.intermission)
		remaining = scr_printspeed->value * (cl.time - scr_centertime_start);
	else
		remaining = 9999;

	scr_erase_center = 0;
	start = scr_centerstring;

	if (scr_center_lines <= 4)
		y = vid.height*0.35;
	else
		y = 48;

	do
	{
	// scan the width of the line
		for (l=0 ; l<40 ; l++)
			if (start[l] == '\n' || !start[l])
				break;
		x = (vid.width - l*8)/2;
		for (j=0 ; j<l ; j++, x+=8)
		{
			Draw_Character (x, y, start[j]);
			if (!remaining--)
				return;
		}

		y += 8;

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

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

void SCR_CheckDrawCenterString (void)
{
	scr_copytop = 1;
	if (scr_center_lines > scr_erase_lines)
		scr_erase_lines = scr_center_lines;

// 2001-10-20 TIMESCALE extension by Tomaz/Maddes  start
//	scr_centertime_off -= host_frametime;
	scr_centertime_off -= host_cpu_frametime;
// 2001-10-20 TIMESCALE extension by Tomaz/Maddes  end

	if (scr_centertime_off <= 0 && !cl.intermission)
		return;
	if (key_dest != key_game)
		return;

	SCR_DrawCenterString ();
}

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

/*
====================
CalcFov
====================
*/
float CalcFov (float fov_x, float width, float height)
{
	float	a;
	float	x;

	if (fov_x < 1 || fov_x > 179)
		Sys_Error ("Bad fov: %f", fov_x);

	x = width/tan(fov_x/360*M_PI);

	a = atan (height/x);

	a = a*360/M_PI;

	return a;
}

/*
=================
SCR_CalcRefdef

Must be called whenever vid changes
Internal use only
=================
*/
static void SCR_CalcRefdef (void)
{
	vrect_t		vrect;
	float		size;
	int		h;
	qboolean		full = false;


	scr_fullupdate = 0;		// force a background redraw
	vid.recalc_refdef = 0;

// force the status bar to redraw
	Sbar_Changed ();

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

// bound viewsize
	if (scr_viewsize->value < 30)
		Cvar_Set (scr_viewsize, "30");
	if (scr_viewsize->value > 120)
		Cvar_Set (scr_viewsize, "120");

// bound field of view
	if (scr_fov->value < 10)
		Cvar_Set (scr_fov,"10");
	if (scr_fov->value > 170)
		Cvar_Set (scr_fov,"170");

// intermission is always full screen
	if (cl.intermission)
		size = 120;
	else
		size = scr_viewsize->value;

	if (size >= 120)
		sb_lines = 0;		// no status bar at all
	else if (size >= 110)
		sb_lines = 24;		// no inventory
	else
		sb_lines = 24+16+8;

	if (scr_viewsize->value >= 100.0) {
		full = true;
		size = 100.0;
	} else
		size = scr_viewsize->value;
	if (cl.intermission)
	{
		full = true;
		size = 100;
		sb_lines = 0;
	}
	size /= 100.0;

	h = vid.height - sb_lines;

	r_refdef.vrect.width = vid.width * size;
	if (r_refdef.vrect.width < 96)
	{
		size = 96.0 / r_refdef.vrect.width;
		r_refdef.vrect.width = 96;	// min for icons
	}

	r_refdef.vrect.height = vid.height * size;
	if (r_refdef.vrect.height > vid.height - sb_lines)
		r_refdef.vrect.height = vid.height - sb_lines;
	if (r_refdef.vrect.height > vid.height)
			r_refdef.vrect.height = vid.height;
	r_refdef.vrect.x = (vid.width - r_refdef.vrect.width)/2;
	if (full)
		r_refdef.vrect.y = 0;
	else
		r_refdef.vrect.y = (h - r_refdef.vrect.height)/2;

	r_refdef.fov_x = scr_fov->value;
	r_refdef.fov_y = CalcFov (r_refdef.fov_x, r_refdef.vrect.width, r_refdef.vrect.height);

	scr_vrect = r_refdef.vrect;
}


/*
=================
SCR_SizeUp_f

Keybinding command
=================
*/
void SCR_SizeUp_f (void)
{
	Cvar_SetValue (scr_viewsize, scr_viewsize->value+10);
	vid.recalc_refdef = 1;
}


/*
=================
SCR_SizeDown_f

Keybinding command
=================
*/
void SCR_SizeDown_f (void)
{
	Cvar_SetValue (scr_viewsize, scr_viewsize->value-10);
	vid.recalc_refdef = 1;
}

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

// 2001-09-18 New cvar system by Maddes (Init)  start
/*
==================
SCR_Init_Cvars
==================
*/
void
SCR_Init_Cvars (void)
{
	scr_fov = Cvar_Get ("fov", "90", CVAR_ORIGINAL);

	scr_viewsize = Cvar_Get ("viewsize", "100", CVAR_ARCHIVE|CVAR_ORIGINAL);
	scr_conspeed = Cvar_Get ("scr_conspeed", "300", CVAR_ORIGINAL);
	scr_showram = Cvar_Get ("showram", "1", CVAR_ORIGINAL);
	scr_showturtle = Cvar_Get ("showturtle", "0", CVAR_ORIGINAL);
	scr_showpause = Cvar_Get ("showpause", "1", CVAR_ORIGINAL);
	scr_centertime = Cvar_Get ("scr_centertime", "2", CVAR_ORIGINAL);
	scr_printspeed = Cvar_Get ("scr_printspeed", "8", CVAR_ORIGINAL);
	gl_triplebuffer = Cvar_Get ("gl_triplebuffer", "1", CVAR_ARCHIVE|CVAR_ORIGINAL);

// 2000-01-12 Variable console height by Fett  start
	scr_conheight = Cvar_Get ("scr_conheight", "0.5", CVAR_ARCHIVE);
	Cvar_SetRangecheck (scr_conheight, Cvar_RangecheckFloat, 0, 1);
	Cvar_Set(scr_conheight, scr_conheight->string);	// do rangecheck
// 2000-01-12 Variable console height by Fett  end
}
// 2001-09-18 New cvar system by Maddes (Init)  end

/*
==================
SCR_Init
==================
*/
void SCR_Init (void)
{

// 2001-09-18 New cvar system by Maddes (Init)  start
/*
	scr_fov = Cvar_Get ("fov", "90", CVAR_ORIGINAL);

	scr_viewsize = Cvar_Get ("viewsize", "100", CVAR_ARCHIVE|CVAR_ORIGINAL);
	scr_conspeed = Cvar_Get ("scr_conspeed", "300", CVAR_ORIGINAL);
	scr_showram = Cvar_Get ("showram", "1", CVAR_ORIGINAL);
	scr_showturtle = Cvar_Get ("showturtle", "0", CVAR_ORIGINAL);
	scr_showpause = Cvar_Get ("showpause", "1", CVAR_ORIGINAL);
	scr_centertime = Cvar_Get ("scr_centertime", "2", CVAR_ORIGINAL);
	scr_printspeed = Cvar_Get ("scr_printspeed", "8", CVAR_ORIGINAL);
	gl_triplebuffer = Cvar_Get ("gl_triplebuffer", "1", CVAR_ARCHIVE|CVAR_ORIGINAL);

// 2000-01-12 Variable console height by Fett  start
	scr_conheight = Cvar_Get ("scr_conheight", "0.5", CVAR_ARCHIVE);
	Cvar_SetRangecheck (scr_conheight, Cvar_RangecheckFloat, 0, 1);
	Cvar_Set(scr_conheight, scr_conheight->string);	// do rangecheck
// 2000-01-12 Variable console height by Fett  end
*/
// 2001-09-18 New cvar system by Maddes (Init)  end

//
// register our commands
//
	Cmd_AddCommand ("screenshot",SCR_ScreenShot_f);
	Cmd_AddCommand ("sizeup",SCR_SizeUp_f);
	Cmd_AddCommand ("sizedown",SCR_SizeDown_f);

	scr_ram = Draw_PicFromWad ("ram");
	scr_net = Draw_PicFromWad ("net");
	scr_turtle = Draw_PicFromWad ("turtle");

	scr_initialized = true;
}



/*
==============
SCR_DrawRam
==============
*/
void SCR_DrawRam (void)
{
	if (!scr_showram->value)
		return;

	if (!r_cache_thrash)
		return;

	Draw_Pic (scr_vrect.x+32, scr_vrect.y, scr_ram);
}

/*
==============
SCR_DrawTurtle
==============
*/
void SCR_DrawTurtle (void)
{
	static int	count;

	if (!scr_showturtle->value)
		return;

// 2001-10-20 TIMESCALE extension by Tomaz/Maddes  start
//	if (host_frametime < 0.1)
	if (host_cpu_frametime < 0.1)
// 2001-10-20 TIMESCALE extension by Tomaz/Maddes  end
	{
		count = 0;
		return;
	}

	count++;
	if (count < 3)
		return;

	Draw_Pic (scr_vrect.x, scr_vrect.y, scr_turtle);
}

/*
==============
SCR_DrawNet
==============
*/
void SCR_DrawNet (void)
{
	if (realtime - cl.last_received_message < 0.3)
		return;
	if (cls.demoplayback)
		return;

	Draw_Pic (scr_vrect.x+64, scr_vrect.y, scr_net);
}

// 2001-11-31 FPS display by QuakeForge/Muff  start
/*
==============
SCR_DrawFPS
==============
*/
//muff - hacked out of SourceForge implementation + modified
void SCR_DrawFPS (void)
{
	static double lastframetime;
	double t;
	static int lastfps;