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/*

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"

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

		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;

}

/*

===============

Draw_Init

===============

*/

void Draw_Init (void)

{

	int		i;

	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 ; vheight ; 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 ; vheight ; v++)

		{

			for (u=0 ; uwidth ; 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 ; vheight ; v++)

			{

				for (u=0 ; uwidth ; u++)

					if ( (tbyte=source[u]) != TRANSPARENT_COLOR)

						dest[u] = tbyte;

				dest += vid.rowbytes;

				source += pic->width;

			}

		}

		else

		{	// unwound

			for (v=0 ; vheight ; v++)

			{

				for (u=0 ; uwidth ; 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 ; vheight ; v++)

		{

			for (u=0 ; uwidth ; 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 ; vheight ; v++)

			{

				for (u=0 ; uwidth ; u++)

					if ( (tbyte=source[u]) != TRANSPARENT_COLOR)

						dest[u] = translation[tbyte];

				dest += vid.rowbytes;

				source += pic->width;

			}

		}

		else

		{	// unwound

			for (v=0 ; vheight ; v++)

			{

				for (u=0 ; uwidth ; u+=8)

				{

					if ( (tbyte=source[u]) != TRANSPARENT_COLOR)

						dest[u] = translation[tbyte];

					if ( (tbyte=source[u+1]) != TRANSPARENT_COLOR)

						dest[u+1] = translation[tbyte];

					if ( (tbyte=source[u+2]) != TRANSPARENT_COLOR)

						dest[u+2] = translation[tbyte];

					if ( (tbyte=source[u+3]) != TRANSPARENT_COLOR)

						dest[u+3] = translation[tbyte];

					if ( (tbyte=source[u+4]) != TRANSPARENT_COLOR)

						dest[u+4] = translation[tbyte];

					if ( (tbyte=source[u+5]) != TRANSPARENT_COLOR)

						dest[u+5] = translation[tbyte];

					if ( (tbyte=source[u+6]) != TRANSPARENT_COLOR)

						dest[u+6] = translation[tbyte];

					if ( (tbyte=source[u+7]) != TRANSPARENT_COLOR)

						dest[u+7] = translation[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 ; vheight ; v++)

		{

			for (u=0 ; uwidth ; u++)

			{

				tbyte = source[u];

				if (tbyte != TRANSPARENT_COLOR)

				{

					pusdest[u] = d_8to16table[tbyte];

				}

			}

			pusdest += vid.rowbytes >> 1;

			source += pic->width;

		}

	}

}

void Draw_CharToConback (int num, byte *dest)

{

	int		row, col;

	byte	*source;

	int		drawline;

	int		x;

	row = num>>4;

	col = num&15;

	source = draw_chars + (row<<10) + (col<<3);

	drawline = 8;

	while (drawline--)

	{

		for (x=0 ; x<8 ; x++)

			if (source[x])

				dest[x] = 0x60 + source[x];

		source += 128;

		dest += 320;

	}

}

/*

================

Draw_ConsoleBackground

================

*/

void Draw_ConsoleBackground (int lines)

{

	int				x, y, v;

	byte			*src, *dest;

	unsigned short	*pusdest;

	int				f, fstep;

	qpic_t			*conback;

	char			ver[100];

	conback = Draw_CachePic ("gfx/conback.lmp");

// hack the version number directly into the pic

#ifdef _WIN32

	sprintf (ver, "(WinQuake) %4.2f", (float)VERSION);

	dest = conback->data + 320*186 + 320 - 11 - 8*strlen(ver);

#elif defined(X11)

	sprintf (ver, "(X11 Quake %2.2f) %4.2f", (float)X11_VERSION, (float)VERSION);

	dest = conback->data + 320*186 + 320 - 11 - 8*strlen(ver);

#elif defined(__linux__)

	sprintf (ver, "(Linux Quake %2.2f) %4.2f", (float)LINUX_VERSION, (float)VERSION);

	dest = conback->data + 320*186 + 320 - 11 - 8*strlen(ver);

#else

	dest = conback->data + 320 - 43 + 320*186;

	sprintf (ver, "%4.2f", VERSION);

#endif

	for (x=0 ; x

		Draw_CharToConback (ver[x], dest+(x<<3));

// draw the pic

	if (r_pixbytes == 1)

	{

		dest = vid.conbuffer;

		for (y=0 ; y

		{

			v = (vid.conheight - lines + y)*200/vid.conheight;

			src = conback->data + v*320;

			if (vid.conwidth == 320)

				memcpy (dest, src, vid.conwidth);

			else

			{

				f = 0;

				fstep = 320*0x10000/vid.conwidth;

				for (x=0 ; x

				{

					dest[x] = src[f>>16];

					f += fstep;

					dest[x+1] = src[f>>16];

					f += fstep;

					dest[x+2] = src[f>>16];

					f += fstep;

					dest[x+3] = src[f>>16];

					f += fstep;

				}

			}

		}

	}

	else

	{

		pusdest = (unsigned short *)vid.conbuffer;

		for (y=0 ; y> 1))

		{

		// FIXME: pre-expand to native format?

		// FIXME: does the endian switching go away in production?

			v = (vid.conheight - lines + y)*200/vid.conheight;

			src = conback->data + v*320;

			f = 0;

			fstep = 320*0x10000/vid.conwidth;

			for (x=0 ; x

			{

				pusdest[x] = d_8to16table[src[f>>16]];

				f += fstep;

				pusdest[x+1] = d_8to16table[src[f>>16]];

				f += fstep;

				pusdest[x+2] = d_8to16table[src[f>>16]];

				f += fstep;

				pusdest[x+3] = d_8to16table[src[f>>16]];

				f += fstep;

			}

		}

	}

}

/*

==============

R_DrawRect8

==============

*/

void R_DrawRect8 (vrect_t *prect, int rowbytes, byte *psrc,

	int transparent)

{

	byte	t;

	int		i, j, srcdelta, destdelta;

	byte	*pdest;

	pdest = vid.buffer + (prect->y * vid.rowbytes) + prect->x;

	srcdelta = rowbytes - prect->width;

	destdelta = vid.rowbytes - prect->width;

	if (transparent)

	{

		for (i=0 ; iheight ; i++)

		{

			for (j=0 ; jwidth ; j++)

			{

				t = *psrc;

				if (t != TRANSPARENT_COLOR)

				{

					*pdest = t;

				}

				psrc++;

				pdest++;

			}

			psrc += srcdelta;

			pdest += destdelta;

		}

	}

	else

	{

		for (i=0 ; iheight ; i++)

		{

			memcpy (pdest, psrc, prect->width);

			psrc += rowbytes;

			pdest += vid.rowbytes;

		}

	}

}

/*

==============

R_DrawRect16

==============

*/

void R_DrawRect16 (vrect_t *prect, int rowbytes, byte *psrc,

	int transparent)

{

	byte			t;

	int				i, j, srcdelta, destdelta;

	unsigned short	*pdest;

// FIXME: would it be better to pre-expand native-format versions?

	pdest = (unsigned short *)vid.buffer +

			(prect->y * (vid.rowbytes >> 1)) + prect->x;

	srcdelta = rowbytes - prect->width;

	destdelta = (vid.rowbytes >> 1) - prect->width;

	if (transparent)

	{

		for (i=0 ; iheight ; i++)

		{

			for (j=0 ; jwidth ; j++)

			{

				t = *psrc;

				if (t != TRANSPARENT_COLOR)

				{

					*pdest = d_8to16table[t];

				}

				psrc++;

				pdest++;

			}

			psrc += srcdelta;

			pdest += destdelta;

		}

	}

	else

	{

		for (i=0 ; iheight ; i++)

		{

			for (j=0 ; jwidth ; j++)

			{

				*pdest = d_8to16table[*psrc];

				psrc++;

				pdest++;

			}

			psrc += srcdelta;

			pdest += destdelta;

		}

	}

}

/*

=============

Draw_TileClear

This repeats a 64*64 tile graphic to fill the screen around a sized down

refresh window.

=============

*/

void Draw_TileClear (int x, int y, int w, int h)

{

	int				width, height, tileoffsetx, tileoffsety;

	byte			*psrc;

	vrect_t			vr;

	r_rectdesc.rect.x = x;

	r_rectdesc.rect.y = y;

	r_rectdesc.rect.width = w;

	r_rectdesc.rect.height = h;

	vr.y = r_rectdesc.rect.y;

	height = r_rectdesc.rect.height;

	tileoffsety = vr.y % r_rectdesc.height;

	while (height > 0)

	{

		vr.x = r_rectdesc.rect.x;

		width = r_rectdesc.rect.width;

		if (tileoffsety != 0)

			vr.height = r_rectdesc.height - tileoffsety;

		else

			vr.height = r_rectdesc.height;

		if (vr.height > height)

			vr.height = height;

		tileoffsetx = vr.x % r_rectdesc.width;

		while (width > 0)

		{

			if (tileoffsetx != 0)

				vr.width = r_rectdesc.width - tileoffsetx;

			else

				vr.width = r_rectdesc.width;

			if (vr.width > width)

				vr.width = width;

			psrc = r_rectdesc.ptexbytes +

					(tileoffsety * r_rectdesc.rowbytes) + tileoffsetx;

			if (r_pixbytes == 1)

			{

				R_DrawRect8 (&vr, r_rectdesc.rowbytes, psrc, 0);

			}

			else

			{

				R_DrawRect16 (&vr, r_rectdesc.rowbytes, psrc, 0);

			}

			vr.x += vr.width;

			width -= vr.width;

			tileoffsetx = 0;	// only the left tile can be left-clipped

		}

		vr.y += vr.height;

		height -= vr.height;

		tileoffsety = 0;		// only the top tile can be top-clipped

	}

}

/*

=============

Draw_Fill

Fills a box of pixels with a single color

=============

*/

void Draw_Fill (int x, int y, int w, int h, int c)

{

	byte			*dest;

	unsigned short	*pusdest;

	unsigned		uc;

	int				u, v;

	if (r_pixbytes == 1)

	{

		dest = vid.buffer + y*vid.rowbytes + x;

		for (v=0 ; v

			for (u=0 ; u

				dest[u] = c;

	}

	else

	{

		uc = d_8to16table[c];

		pusdest = (unsigned short *)vid.buffer + y * (vid.rowbytes >> 1) + x;

		for (v=0 ; v> 1))

			for (u=0 ; u

				pusdest[u] = uc;

	}

}

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

/*

================

Draw_FadeScreen

================

*/

void Draw_FadeScreen (void)

{

	int			x,y;

	byte		*pbuf;

	VID_UnlockBuffer ();

	S_ExtraUpdate ();

	VID_LockBuffer ();

	for (y=0 ; y

	{

		int	t;

		pbuf = (byte *)(vid.buffer + vid.rowbytes*y);

		t = (y & 1) << 1;

		for (x=0 ; x

		{

			if ((x & 3) != t)

				pbuf[x] = 0;

		}

	}

	VID_UnlockBuffer ();

	S_ExtraUpdate ();

	VID_LockBuffer ();

}

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

/*

================

Draw_BeginDisc

Draws the little blue disc in the corner of the screen.

Call before beginning any disc IO.

================

*/

void Draw_BeginDisc (void)

{

	D_BeginDirectRect (vid.width - 24, 0, draw_disc->data, 24, 24);

}

/*

================

Draw_EndDisc

Erases the disc icon.

Call after completing any disc IO

================

*/

void Draw_EndDisc (void)

{

	D_EndDirectRect (vid.width - 24, 0, 24, 24);

}