draw.c

来自「quake1 dos源代码最新版本」· C语言 代码 · 共 958 行 · 第 1/2 页

/*
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.

*/

// draw.c -- this is the only file outside the refresh that touches the
// vid buffer

#include "quakedef.h"

// 2000-08-04 "Transparent" console background for software renderer by Norberto Alfredo Bensa/Maddes  start
extern cvar_t	*con_alpha;

byte fademask[] =
{
	0x00,	// invisible
	0x14,	// 25%
	0x5a,	// 50%
	0xeb,	// 75%
	0xff,	// solid
};

#define CON_ALPHASTATES (sizeof(fademask) / sizeof(fademask[0]))
// 2000-08-04 "Transparent" console background for software renderer by Norberto Alfredo Bensa/Maddes  end

typedef struct {
	vrect_t	rect;
	int		width;
	int		height;
	byte	*ptexbytes;
	int		rowbytes;
} rectdesc_t;

static rectdesc_t	r_rectdesc;

byte		*draw_chars;				// 8*8 graphic characters
qpic_t		*draw_disc;
qpic_t		*draw_backtile;

//=============================================================================
/* Support Routines */

typedef struct cachepic_s
{
	char		name[MAX_QPATH];
	cache_user_t	cache;
} cachepic_t;

#define	MAX_CACHED_PICS		128
cachepic_t	menu_cachepics[MAX_CACHED_PICS];
int			menu_numcachepics;


qpic_t	*Draw_PicFromWad (char *name)
{
	return W_GetLumpName (name);
}

/*
================
Draw_CachePic
================
*/
qpic_t	*Draw_CachePic (char *path)
{
	cachepic_t	*pic;
	int			i;
	qpic_t		*dat;

	for (pic=menu_cachepics, i=0 ; i<menu_numcachepics ; pic++, i++)
		if (!strcmp (path, pic->name))
			break;

	if (i == menu_numcachepics)
	{
		if (menu_numcachepics == MAX_CACHED_PICS)
			Sys_Error ("menu_numcachepics == MAX_CACHED_PICS");
		menu_numcachepics++;
		strcpy (pic->name, path);
	}

	dat = Cache_Check (&pic->cache);

	if (dat)
		return dat;

//
// load the pic from disk
//
	COM_LoadCacheFile (path, &pic->cache);

	dat = (qpic_t *)pic->cache.data;
	if (!dat)
	{
		Sys_Error ("Draw_CachePic: failed to load %s", path);
	}

	SwapPic (dat);

	return dat;
}


// 2001-09-18 New cvar system by Maddes (Init)  start
/*
===============
Draw_Init_Cvars
===============
*/
void Draw_Init_Cvars (void)
{
}
// 2001-09-18 New cvar system by Maddes (Init)  end

/*
===============
Draw_Init
===============
*/
void Draw_Init (void)
{
//	int		i;	// 2000-07-30 DJGPP compiler warning fix by Norberto Alfredo Bensa

	draw_chars = W_GetLumpName ("conchars");
	draw_disc = W_GetLumpName ("disc");
	draw_backtile = W_GetLumpName ("backtile");

	r_rectdesc.width = draw_backtile->width;
	r_rectdesc.height = draw_backtile->height;
	r_rectdesc.ptexbytes = draw_backtile->data;
	r_rectdesc.rowbytes = draw_backtile->width;
}



/*
================
Draw_Character

Draws one 8*8 graphics character with 0 being transparent.
It can be clipped to the top of the screen to allow the console to be
smoothly scrolled off.
================
*/
void Draw_Character (int x, int y, int num)
{
	byte			*dest;
	byte			*source;
	unsigned short	*pusdest;
	int				drawline;
	int				row, col;

	num &= 255;

	if (y <= -8)
		return;			// totally off screen

#ifdef PARANOID
	if (y > vid.height - 8 || x < 0 || x > vid.width - 8)
		Sys_Error ("Con_DrawCharacter: (%i, %i)", x, y);
	if (num < 0 || num > 255)
		Sys_Error ("Con_DrawCharacter: char %i", num);
#endif

	row = num>>4;
	col = num&15;
	source = draw_chars + (row<<10) + (col<<3);

	if (y < 0)
	{	// clipped
		drawline = 8 + y;
		source -= 128*y;
		y = 0;
	}
	else
		drawline = 8;


	if (r_pixbytes == 1)
	{
		dest = vid.conbuffer + y*vid.conrowbytes + x;

		while (drawline--)
		{
			if (source[0])
				dest[0] = source[0];
			if (source[1])
				dest[1] = source[1];
			if (source[2])
				dest[2] = source[2];
			if (source[3])
				dest[3] = source[3];
			if (source[4])
				dest[4] = source[4];
			if (source[5])
				dest[5] = source[5];
			if (source[6])
				dest[6] = source[6];
			if (source[7])
				dest[7] = source[7];
			source += 128;
			dest += vid.conrowbytes;
		}
	}
	else
	{
	// FIXME: pre-expand to native format?
		pusdest = (unsigned short *)
				((byte *)vid.conbuffer + y*vid.conrowbytes + (x<<1));

		while (drawline--)
		{
			if (source[0])
				pusdest[0] = d_8to16table[source[0]];
			if (source[1])
				pusdest[1] = d_8to16table[source[1]];
			if (source[2])
				pusdest[2] = d_8to16table[source[2]];
			if (source[3])
				pusdest[3] = d_8to16table[source[3]];
			if (source[4])
				pusdest[4] = d_8to16table[source[4]];
			if (source[5])
				pusdest[5] = d_8to16table[source[5]];
			if (source[6])
				pusdest[6] = d_8to16table[source[6]];
			if (source[7])
				pusdest[7] = d_8to16table[source[7]];

			source += 128;
			pusdest += (vid.conrowbytes >> 1);
		}
	}
}

/*
================
Draw_String
================
*/
void Draw_String (int x, int y, char *str)
{
	while (*str)
	{
		Draw_Character (x, y, *str);
		str++;
		x += 8;
	}
}

/*
================
Draw_DebugChar

Draws a single character directly to the upper right corner of the screen.
This is for debugging lockups by drawing different chars in different parts
of the code.
================
*/
void Draw_DebugChar (char num)
{
	byte			*dest;
	byte			*source;
	int				drawline;
	extern byte		*draw_chars;
	int				row, col;

	if (!vid.direct)
		return;		// don't have direct FB access, so no debugchars...

	drawline = 8;

	row = num>>4;
	col = num&15;
	source = draw_chars + (row<<10) + (col<<3);

	dest = vid.direct + 312;

	while (drawline--)
	{
		dest[0] = source[0];
		dest[1] = source[1];
		dest[2] = source[2];
		dest[3] = source[3];
		dest[4] = source[4];
		dest[5] = source[5];
		dest[6] = source[6];
		dest[7] = source[7];
		source += 128;
		dest += 320;
	}
}

/*
=============
Draw_Pic
=============
*/
void Draw_Pic (int x, int y, qpic_t *pic)
{
	byte			*dest, *source;
	unsigned short	*pusdest;
	int				v, u;

	if ((x < 0) ||
		(x + pic->width > vid.width) ||
		(y < 0) ||
		(y + pic->height > vid.height))
	{
		Sys_Error ("Draw_Pic: bad coordinates");
	}

	source = pic->data;

	if (r_pixbytes == 1)
	{
		dest = vid.buffer + y * vid.rowbytes + x;

		for (v=0 ; v<pic->height ; v++)
		{
			Q_memcpy (dest, source, pic->width);
			dest += vid.rowbytes;
			source += pic->width;
		}
	}
	else
	{
	// FIXME: pretranslate at load time?
		pusdest = (unsigned short *)vid.buffer + y * (vid.rowbytes >> 1) + x;

		for (v=0 ; v<pic->height ; v++)
		{
			for (u=0 ; u<pic->width ; u++)
			{
				pusdest[u] = d_8to16table[source[u]];
			}

			pusdest += vid.rowbytes >> 1;
			source += pic->width;
		}
	}
}


/*
=============
Draw_TransPic
=============
*/
void Draw_TransPic (int x, int y, qpic_t *pic)
{
	byte	*dest, *source, tbyte;
	unsigned short	*pusdest;
	int				v, u;

	if (x < 0 || (unsigned)(x + pic->width) > vid.width || y < 0 ||
		 (unsigned)(y + pic->height) > vid.height)
	{
		Sys_Error ("Draw_TransPic: bad coordinates");
	}

	source = pic->data;

	if (r_pixbytes == 1)
	{
		dest = vid.buffer + y * vid.rowbytes + x;

		if (pic->width & 7)
		{	// general
			for (v=0 ; v<pic->height ; v++)
			{
				for (u=0 ; u<pic->width ; u++)
					if ( (tbyte=source[u]) != TRANSPARENT_COLOR)
						dest[u] = tbyte;

				dest += vid.rowbytes;
				source += pic->width;
			}
		}
		else
		{	// unwound
			for (v=0 ; v<pic->height ; v++)
			{
				for (u=0 ; u<pic->width ; u+=8)
				{
					if ( (tbyte=source[u]) != TRANSPARENT_COLOR)
						dest[u] = tbyte;
					if ( (tbyte=source[u+1]) != TRANSPARENT_COLOR)
						dest[u+1] = tbyte;
					if ( (tbyte=source[u+2]) != TRANSPARENT_COLOR)
						dest[u+2] = tbyte;
					if ( (tbyte=source[u+3]) != TRANSPARENT_COLOR)
						dest[u+3] = tbyte;
					if ( (tbyte=source[u+4]) != TRANSPARENT_COLOR)
						dest[u+4] = tbyte;
					if ( (tbyte=source[u+5]) != TRANSPARENT_COLOR)
						dest[u+5] = tbyte;
					if ( (tbyte=source[u+6]) != TRANSPARENT_COLOR)
						dest[u+6] = tbyte;
					if ( (tbyte=source[u+7]) != TRANSPARENT_COLOR)
						dest[u+7] = tbyte;
				}
				dest += vid.rowbytes;
				source += pic->width;
			}
		}
	}
	else
	{
	// FIXME: pretranslate at load time?
		pusdest = (unsigned short *)vid.buffer + y * (vid.rowbytes >> 1) + x;

		for (v=0 ; v<pic->height ; v++)
		{
			for (u=0 ; u<pic->width ; u++)
			{
				tbyte = source[u];

				if (tbyte != TRANSPARENT_COLOR)
				{
					pusdest[u] = d_8to16table[tbyte];
				}
			}

			pusdest += vid.rowbytes >> 1;
			source += pic->width;
		}
	}
}


/*
=============
Draw_TransPicTranslate
=============
*/
void Draw_TransPicTranslate (int x, int y, qpic_t *pic, byte *translation)
{
	byte	*dest, *source, tbyte;
	unsigned short	*pusdest;
	int				v, u;

	if (x < 0 || (unsigned)(x + pic->width) > vid.width || y < 0 ||
		 (unsigned)(y + pic->height) > vid.height)
	{
		Sys_Error ("Draw_TransPic: bad coordinates");
	}

	source = pic->data;

	if (r_pixbytes == 1)
	{
		dest = vid.buffer + y * vid.rowbytes + x;

		if (pic->width & 7)
		{	// general
			for (v=0 ; v<pic->height ; v++)
			{
				for (u=0 ; u<pic->width ; u++)
					if ( (tbyte=source[u]) != TRANSPARENT_COLOR)
						dest[u] = translation[tbyte];

				dest += vid.rowbytes;
				source += pic->width;