screen.c

quake1 dos源代码最新版本

// 2000-01-12 Variable console height by Fett/Maddes  end
	else
		scr_conlines = 0;				// none visible

	if (scr_conlines < scr_con_current)
	{
// 2001-10-20 TIMESCALE extension by Tomaz/Maddes  start
//		scr_con_current -= scr_conspeed->value*host_frametime;
		scr_con_current -= scr_conspeed->value*host_cpu_frametime;
// 2001-10-20 TIMESCALE extension by Tomaz/Maddes  end
		if (scr_conlines > scr_con_current)
			scr_con_current = scr_conlines;

	}
	else if (scr_conlines > scr_con_current)
	{
// 2001-10-20 TIMESCALE extension by Tomaz/Maddes  start
//		scr_con_current += scr_conspeed->value*host_frametime;
		scr_con_current += scr_conspeed->value*host_cpu_frametime;
// 2001-10-20 TIMESCALE extension by Tomaz/Maddes  end
		if (scr_conlines < scr_con_current)
			scr_con_current = scr_conlines;
	}

	if (clearconsole++ < vid.numpages)
	{
		scr_copytop = 1;
// 2000-08-04 "Transparent" console background for software renderer by Norberto Alfredo Bensa/Maddes  start
		if (con_alpha->value == 1.0)
		{
// 2000-08-04 "Transparent" console background for software renderer by Norberto Alfredo Bensa/Maddes  end
		Draw_TileClear (0,(int)scr_con_current,vid.width, vid.height - (int)scr_con_current);
// 2000-08-04 "Transparent" console background for software renderer by Norberto Alfredo Bensa/Maddes  start
		}
		else
		{
			// Draw full valid screen
			Draw_TileClear (0, 0, vid.width, vid.height );
		}
// 2000-08-04 "Transparent" console background for software renderer by Norberto Alfredo Bensa/Maddes  end
		Sbar_Changed ();
	}
	else if (clearnotify++ < vid.numpages)
	{
		scr_copytop = 1;
		Draw_TileClear (0,0,vid.width, con_notifylines);
	}
	else
		con_notifylines = 0;
}

/*
==================
SCR_DrawConsole
==================
*/
void SCR_DrawConsole (void)
{
	if (scr_con_current)
	{
		scr_copyeverything = 1;
		Con_DrawConsole (scr_con_current, true);
		clearconsole = 0;
	}
	else
	{
		if (key_dest == key_game || key_dest == key_message)
			Con_DrawNotify ();	// only draw notify in game
	}
}


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

						SCREEN SHOTS

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


typedef struct
{
    char	manufacturer;
    char	version;
    char	encoding;
    char	bits_per_pixel;
    unsigned short	xmin,ymin,xmax,ymax;
    unsigned short	hres,vres;
    unsigned char	palette[48];
    char	reserved;
    char	color_planes;
    unsigned short	bytes_per_line;
    unsigned short	palette_type;
    char	filler[58];
    unsigned char	data;			// unbounded
} pcx_t;

/*
==============
WritePCXfile
==============
*/
void WritePCXfile (char *filename, byte *data, int width, int height,
	int rowbytes, byte *palette)
{
	int		i, j, length;
	pcx_t	*pcx;
	byte		*pack;

	pcx = Hunk_TempAlloc (width*height*2+1000);
	if (pcx == NULL)
	{
		Con_Printf("SCR_ScreenShot_f: not enough memory\n");
		return;
	}

	pcx->manufacturer = 0x0a;	// PCX id
	pcx->version = 5;			// 256 color
 	pcx->encoding = 1;		// uncompressed
	pcx->bits_per_pixel = 8;		// 256 color
	pcx->xmin = 0;
	pcx->ymin = 0;
	pcx->xmax = LittleShort((short)(width-1));
	pcx->ymax = LittleShort((short)(height-1));
	pcx->hres = LittleShort((short)width);
	pcx->vres = LittleShort((short)height);
	Q_memset (pcx->palette,0,sizeof(pcx->palette));
	pcx->color_planes = 1;		// chunky image
	pcx->bytes_per_line = LittleShort((short)width);
	pcx->palette_type = LittleShort(2);		// not a grey scale
	Q_memset (pcx->filler,0,sizeof(pcx->filler));

// pack the image
	pack = &pcx->data;

	for (i=0 ; i<height ; i++)
	{
		for (j=0 ; j<width ; j++)
		{
			if ( (*data & 0xc0) != 0xc0)
				*pack++ = *data++;
			else
			{
				*pack++ = 0xc1;
				*pack++ = *data++;
			}
		}

		data += rowbytes - width;
	}

// write the palette
	*pack++ = 0x0c;	// palette ID byte
	for (i=0 ; i<768 ; i++)
		*pack++ = *palette++;

// write output file
	length = pack - (byte *)pcx;
	COM_WriteFile (filename, pcx, length);
}



/*
==================
SCR_ScreenShot_f
==================
*/
void SCR_ScreenShot_f (void)
{
	int		i;
	char	pcxname[80];
	char	checkname[MAX_OSPATH];

//
// find a file name to save it to
//
	strcpy(pcxname,"quake00.pcx");

	for (i=0 ; i<=99 ; i++)
	{
		pcxname[5] = i/10 + '0';
		pcxname[6] = i%10 + '0';
		sprintf (checkname, "%s/%s", com_gamedir, pcxname);
		if (Sys_FileTime(checkname) == -1)
			break;	// file doesn't exist
	}
	if (i==100)
	{
		Con_Printf ("SCR_ScreenShot_f: Couldn't create a PCX file\n");
		return;
 	}

//
// save the pcx file
//
	D_EnableBackBufferAccess ();	// enable direct drawing of console to back
									//  buffer

	WritePCXfile (pcxname, vid.buffer, vid.width, vid.height, vid.rowbytes,
				  host_basepal);

	D_DisableBackBufferAccess ();	// for adapters that can't stay mapped in
									//  for linear writes all the time

	Con_Printf ("Wrote %s\n", pcxname);
}


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


/*
===============
SCR_BeginLoadingPlaque

================
*/
void SCR_BeginLoadingPlaque (void)
{
	S_StopAllSounds (true);

	if (cls.state != ca_connected)
		return;
	if (cls.signon != SIGNONS)
		return;

// redraw with no console and the loading plaque
	Con_ClearNotify ();
	scr_centertime_off = 0;
	scr_con_current = 0;

	scr_drawloading = true;
	scr_fullupdate = 0;
	Sbar_Changed ();
	SCR_UpdateScreen ();
	scr_drawloading = false;

	scr_disabled_for_loading = true;
	scr_disabled_time = realtime;
	scr_fullupdate = 0;
}

/*
===============
SCR_EndLoadingPlaque

================
*/
void SCR_EndLoadingPlaque (void)
{
	scr_disabled_for_loading = false;
	scr_fullupdate = 0;
	Con_ClearNotify ();
}

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

char	*scr_notifystring;
qboolean	scr_drawdialog;

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

	start = scr_notifystring;

	y = vid.height*0.35;

	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]);

		y += 8;

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

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

/*
==================
SCR_ModalMessage

Displays a text string in the center of the screen and waits for a Y or N
keypress.
==================
*/
int SCR_ModalMessage (char *text)
{
	if (cls.state == ca_dedicated)
		return true;

	scr_notifystring = text;

// draw a fresh screen
	scr_fullupdate = 0;
	scr_drawdialog = true;
	SCR_UpdateScreen ();
	scr_drawdialog = false;

	S_ClearBuffer ();		// so dma doesn't loop current sound

	do
	{
		key_count = -1;		// wait for a key down and up
		Sys_SendKeyEvents ();
	} while (key_lastpress != 'y' && key_lastpress != 'n' && key_lastpress != K_ESCAPE);

	scr_fullupdate = 0;
	SCR_UpdateScreen ();

	return key_lastpress == 'y';
}


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

/*
===============
SCR_BringDownConsole

Brings the console down and fades the palettes back to normal
================
*/
void SCR_BringDownConsole (void)
{
	int		i;

	scr_centertime_off = 0;

	for (i=0 ; i<20 && scr_conlines != scr_con_current ; i++)
		SCR_UpdateScreen ();

	cl.cshifts[0].percent = 0;		// no area contents palette on next frame
	VID_SetPalette (host_basepal);
}


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

This is called every frame, and can also be called explicitly to flush
text to the screen.

WARNING: be very careful calling this from elsewhere, because the refresh
needs almost the entire 256k of stack space!
==================
*/
void SCR_UpdateScreen (void)
{
	static float	oldscr_viewsize;
	static float	oldlcd_x;
	vrect_t		vrect;

	if (scr_skipupdate || block_drawing)
		return;

	scr_copytop = 0;
	scr_copyeverything = 0;

	if (scr_disabled_for_loading)
	{
		if (realtime - scr_disabled_time > 60)
		{
			scr_disabled_for_loading = false;
			Con_Printf ("load failed.\n");
		}
		else
			return;
	}

	if (cls.state == ca_dedicated)
		return;				// stdout only

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

	if (scr_viewsize->value != oldscr_viewsize)
	{
		oldscr_viewsize = scr_viewsize->value;
		vid.recalc_refdef = 1;
	}

//
// check for vid changes
//
	if (oldfov != scr_fov->value)
	{
		oldfov = scr_fov->value;
		vid.recalc_refdef = true;
	}

	if (oldlcd_x != lcd_x->value)
	{
		oldlcd_x = lcd_x->value;
		vid.recalc_refdef = true;
	}

	if (oldscreensize != scr_viewsize->value)
	{
		oldscreensize = scr_viewsize->value;
		vid.recalc_refdef = true;
	}

	if (vid.recalc_refdef)
	{
	// something changed, so reorder the screen
		SCR_CalcRefdef ();
	}

//
// do 3D refresh drawing, and then update the screen
//
	D_EnableBackBufferAccess ();	// of all overlay stuff if drawing directly

	if (scr_fullupdate++ < vid.numpages)
	{	// clear the entire screen
		scr_copyeverything = 1;
		Draw_TileClear (0,0,vid.width,vid.height);
		Sbar_Changed ();
	}

	pconupdate = NULL;


	SCR_SetUpToDrawConsole ();
	SCR_EraseCenterString ();

	D_DisableBackBufferAccess ();	// for adapters that can't stay mapped in
									//  for linear writes all the time

	VID_LockBuffer ();

	V_RenderView ();

	VID_UnlockBuffer ();

	D_EnableBackBufferAccess ();	// of all overlay stuff if drawing directly

	if (scr_drawdialog)
	{
		Sbar_Draw ();
		Draw_FadeScreen ();
		SCR_DrawNotifyString ();
		scr_copyeverything = true;
	}
	else if (scr_drawloading)
	{
		SCR_DrawLoading ();
		Sbar_Draw ();
	}
	else if (cl.intermission == 1 && key_dest == key_game)
	{
		Sbar_IntermissionOverlay ();
	}
	else if (cl.intermission == 2 && key_dest == key_game)
	{
		Sbar_FinaleOverlay ();
		SCR_CheckDrawCenterString ();
	}
	else if (cl.intermission == 3 && key_dest == key_game)
	{
		SCR_CheckDrawCenterString ();
	}
	else
	{
		SCR_DrawRam ();
		SCR_DrawNet ();
		SCR_DrawTurtle ();
		SCR_DrawFPS ();	// 2001-11-31 FPS display by QuakeForge/Muff
		SCR_DrawPause ();
		SCR_CheckDrawCenterString ();
		Sbar_Draw ();
		SCR_DrawConsole ();
		M_Draw ();
	}

	D_DisableBackBufferAccess ();	// for adapters that can't stay mapped in
									//  for linear writes all the time
	if (pconupdate)
	{
		D_UpdateRects (pconupdate);
	}

	V_UpdatePalette ();

//
// update one of three areas
//

	if (scr_copyeverything)
	{
		vrect.x = 0;
		vrect.y = 0;
		vrect.width = vid.width;
		vrect.height = vid.height;
		vrect.pnext = 0;

		VID_Update (&vrect);
	}
	else if (scr_copytop)
	{
		vrect.x = 0;
		vrect.y = 0;
		vrect.width = vid.width;
		vrect.height = vid.height - sb_lines;
		vrect.pnext = 0;

		VID_Update (&vrect);
	}
	else
	{
		vrect.x = scr_vrect.x;
		vrect.y = scr_vrect.y;
		vrect.width = scr_vrect.width;
		vrect.height = scr_vrect.height;
		vrect.pnext = 0;

		VID_Update (&vrect);
	}
}


/*
==================
SCR_UpdateWholeScreen
==================
*/
void SCR_UpdateWholeScreen (void)
{
	scr_fullupdate = 0;
	SCR_UpdateScreen ();
}