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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"

#define GL_COLOR_INDEX8_EXT     0x80E5

extern unsigned char d_15to8table[65536];

cvar_t		gl_nobind = {"gl_nobind", "0"};

cvar_t		gl_max_size = {"gl_max_size", "1024"};

cvar_t		gl_picmip = {"gl_picmip", "0"};

byte		*draw_chars;				// 8*8 graphic characters

qpic_t		*draw_disc;

qpic_t		*draw_backtile;

int			translate_texture;

int			char_texture;

typedef struct

{

	int		texnum;

	float	sl, tl, sh, th;

} glpic_t;

byte		conback_buffer[sizeof(qpic_t) + sizeof(glpic_t)];

qpic_t		*conback = (qpic_t *)&conback_buffer;

int		gl_lightmap_format = 4;

int		gl_solid_format = 3;

int		gl_alpha_format = 4;

int		gl_filter_min = GL_LINEAR_MIPMAP_NEAREST;

int		gl_filter_max = GL_LINEAR;

int		texels;

typedef struct

{

	int		texnum;

	char	identifier[64];

	int		width, height;

	qboolean	mipmap;

} gltexture_t;

#define	MAX_GLTEXTURES	1024

gltexture_t	gltextures[MAX_GLTEXTURES];

int			numgltextures;

void GL_Bind (int texnum)

{

	if (gl_nobind.value)

		texnum = char_texture;

	if (currenttexture == texnum)

		return;

	currenttexture = texnum;

#ifdef _WIN32

	bindTexFunc (GL_TEXTURE_2D, texnum);

#else

	glBindTexture(GL_TEXTURE_2D, texnum);

#endif

}

/*

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

  scrap allocation

  Allocate all the little status bar obejcts into a single texture

  to crutch up stupid hardware / drivers

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

*/

#define	MAX_SCRAPS		2

#define	BLOCK_WIDTH		256

#define	BLOCK_HEIGHT	256

int			scrap_allocated[MAX_SCRAPS][BLOCK_WIDTH];

byte		scrap_texels[MAX_SCRAPS][BLOCK_WIDTH*BLOCK_HEIGHT*4];

qboolean	scrap_dirty;

int			scrap_texnum;

// returns a texture number and the position inside it

int Scrap_AllocBlock (int w, int h, int *x, int *y)

{

	int		i, j;

	int		best, best2;

	int		bestx;

	int		texnum;

	for (texnum=0 ; texnum

	{

		best = BLOCK_HEIGHT;

		for (i=0 ; i

		{

			best2 = 0;

			for (j=0 ; j

			{

				if (scrap_allocated[texnum][i+j] >= best)

					break;

				if (scrap_allocated[texnum][i+j] > best2)

					best2 = scrap_allocated[texnum][i+j];

			}

			if (j == w)

			{	// this is a valid spot

				*x = i;

				*y = best = best2;

			}

		}

		if (best + h > BLOCK_HEIGHT)

			continue;

		for (i=0 ; i

			scrap_allocated[texnum][*x + i] = best + h;

		return texnum;

	}

	Sys_Error ("Scrap_AllocBlock: full");

}

int	scrap_uploads;

void Scrap_Upload (void)

{

	int		texnum;

	scrap_uploads++;

	for (texnum=0 ; texnum

		GL_Bind(scrap_texnum + texnum);

		GL_Upload8 (scrap_texels[texnum], BLOCK_WIDTH, BLOCK_HEIGHT, false, true);

	}

	scrap_dirty = false;

}

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

/* Support Routines */

typedef struct cachepic_s

{

	char		name[MAX_QPATH];

	qpic_t		pic;

	byte		padding[32];	// for appended glpic

} cachepic_t;

#define	MAX_CACHED_PICS		128

cachepic_t	menu_cachepics[MAX_CACHED_PICS];

int			menu_numcachepics;

byte		menuplyr_pixels[4096];

int		pic_texels;

int		pic_count;

qpic_t *Draw_PicFromWad (char *name)

{

	qpic_t	*p;

	glpic_t	*gl;

	p = W_GetLumpName (name);

	gl = (glpic_t *)p->data;

	// load little ones into the scrap

	if (p->width < 64 && p->height < 64)

	{

		int		x, y;

		int		i, j, k;

		int		texnum;

		texnum = Scrap_AllocBlock (p->width, p->height, &x, &y);

		scrap_dirty = true;

		k = 0;

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

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

				scrap_texels[texnum][(y+i)*BLOCK_WIDTH + x + j] = p->data[k];

		texnum += scrap_texnum;

		gl->texnum = texnum;

		gl->sl = (x+0.01)/(float)BLOCK_WIDTH;

		gl->sh = (x+p->width-0.01)/(float)BLOCK_WIDTH;

		gl->tl = (y+0.01)/(float)BLOCK_WIDTH;

		gl->th = (y+p->height-0.01)/(float)BLOCK_WIDTH;

		pic_count++;

		pic_texels += p->width*p->height;

	}

	else

	{

		gl->texnum = GL_LoadPicTexture (p);

		gl->sl = 0;

		gl->sh = 1;

		gl->tl = 0;

		gl->th = 1;

	}

	return p;

}

/*

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

Draw_CachePic

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

*/

qpic_t	*Draw_CachePic (char *path)

{

	cachepic_t	*pic;

	int			i;

	qpic_t		*dat;

	glpic_t		*gl;

	for (pic=menu_cachepics, i=0 ; i

		if (!strcmp (path, pic->name))

			return &pic->pic;

	if (menu_numcachepics == MAX_CACHED_PICS)

		Sys_Error ("menu_numcachepics == MAX_CACHED_PICS");

	menu_numcachepics++;

	strcpy (pic->name, path);

//

// load the pic from disk

//

	dat = (qpic_t *)COM_LoadTempFile (path);

	if (!dat)

		Sys_Error ("Draw_CachePic: failed to load %s", path);

	SwapPic (dat);

	// HACK HACK HACK --- we need to keep the bytes for

	// the translatable player picture just for the menu

	// configuration dialog

	if (!strcmp (path, "gfx/menuplyr.lmp"))

		memcpy (menuplyr_pixels, dat->data, dat->width*dat->height);

	pic->pic.width = dat->width;

	pic->pic.height = dat->height;

	gl = (glpic_t *)pic->pic.data;

	gl->texnum = GL_LoadPicTexture (dat);

	gl->sl = 0;

	gl->sh = 1;

	gl->tl = 0;

	gl->th = 1;

	return &pic->pic;

}

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] != 255)

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

		source += 128;

		dest += 320;

	}

}

typedef struct

{

	char *name;

	int	minimize, maximize;

} glmode_t;

glmode_t modes[] = {

	{"GL_NEAREST", GL_NEAREST, GL_NEAREST},

	{"GL_LINEAR", GL_LINEAR, GL_LINEAR},

	{"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},

	{"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},

	{"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},

	{"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}

};

/*

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

Draw_TextureMode_f

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

*/

void Draw_TextureMode_f (void)

{

	int		i;

	gltexture_t	*glt;

	if (Cmd_Argc() == 1)

	{

		for (i=0 ; i< 6 ; i++)

			if (gl_filter_min == modes[i].minimize)

			{

				Con_Printf ("%s\n", modes[i].name);

				return;

			}

		Con_Printf ("current filter is unknown???\n");

		return;

	}

	for (i=0 ; i< 6 ; i++)

	{

		if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )

			break;

	}

	if (i == 6)

	{

		Con_Printf ("bad filter name\n");

		return;

	}

	gl_filter_min = modes[i].minimize;

	gl_filter_max = modes[i].maximize;

	// change all the existing mipmap texture objects

	for (i=0, glt=gltextures ; i

	{

		if (glt->mipmap)

		{

			GL_Bind (glt->texnum);

			glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);

			glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);

		}

	}

}

/*

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

Draw_Init

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

*/

void Draw_Init (void)

{

	int		i;

	qpic_t	*cb;

	byte	*dest, *src;

	int		x, y;

	char	ver[40];

	glpic_t	*gl;

	int		start;

	byte	*ncdata;

	int		f, fstep;

	Cvar_RegisterVariable (&gl_nobind);

	Cvar_RegisterVariable (&gl_max_size);

	Cvar_RegisterVariable (&gl_picmip);

	// 3dfx can only handle 256 wide textures

	if (!Q_strncasecmp ((char *)gl_renderer, "3dfx",4) ||

		strstr((char *)gl_renderer, "Glide"))

		Cvar_Set ("gl_max_size", "256");

	Cmd_AddCommand ("gl_texturemode", &Draw_TextureMode_f);

	// load the console background and the charset

	// by hand, because we need to write the version

	// string into the background before turning

	// it into a texture

	draw_chars = W_GetLumpName ("conchars");

	for (i=0 ; i<256*64 ; i++)

		if (draw_chars[i] == 0)

			draw_chars[i] = 255;	// proper transparent color

	// now turn them into textures

	char_texture = GL_LoadTexture ("charset", 128, 128, draw_chars, false, true);

	start = Hunk_LowMark();

	cb = (qpic_t *)COM_LoadTempFile ("gfx/conback.lmp");

	if (!cb)

		Sys_Error ("Couldn't load gfx/conback.lmp");

	SwapPic (cb);

	// hack the version number directly into the pic

#if defined(__linux__)

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

#else

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

#endif

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

	y = strlen(ver);

	for (x=0 ; x

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

#if 0

	conback->width = vid.conwidth;

	conback->height = vid.conheight;

 	// scale console to vid size

 	dest = ncdata = Hunk_AllocName(vid.conwidth * vid.conheight, "conback");

 	for (y=0 ; y

 	{

 		src = cb->data + cb->width * (y*cb->height/vid.conheight);

 		if (vid.conwidth == cb->width)

 			memcpy (dest, src, vid.conwidth);

 		else

 		{

 			f = 0;

 			fstep = cb->width*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

	conback->width = cb->width;

	conback->height = cb->height;

	ncdata = cb->data;

#endif

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

	gl = (glpic_t *)conback->data;

	gl->texnum = GL_LoadTexture ("conback", conback->width, conback->height, ncdata, false, false);

	gl->sl = 0;

	gl->sh = 1;

	gl->tl = 0;

	gl->th = 1;

	conback->width = vid.width;

	conback->height = vid.height;

	// free loaded console

	Hunk_FreeToLowMark(start);

	// save a texture slot for translated picture

	translate_texture = texture_extension_number++;

	// save slots for scraps

	scrap_texnum = texture_extension_number;

	texture_extension_number += MAX_SCRAPS;

	//

	// get the other pics we need

	//

	draw_disc = Draw_PicFromWad ("disc");

	draw_backtile = Draw_PicFromWad ("backtile");

}

/*

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

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;

	float			frow, fcol, size;

	if (num == 32)

		return;		// space

	num &= 255;

	if (y <= -8)

		return;			// totally off screen

	row = num>>4;

	col = num&15;

	frow = row*0.0625;

	fcol = col*0.0625;

	size = 0.0625;

	GL_Bind (char_texture);

	glBegin (GL_QUADS);

	glTexCoord2f (fcol, frow);

	glVertex2f (x, y);

	glTexCoord2f (fcol + size, frow);

	glVertex2f (x+8, y);

	glTexCoord2f (fcol + size, frow + size);

	glVertex2f (x+8, y+8);

	glTexCoord2f (fcol, frow + size);

	glVertex2f (x, y+8);

	glEnd ();

}

/*

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

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)

{

}

/*

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

Draw_AlphaPic

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

*/

void Draw_AlphaPic (int x, int y, qpic_t *pic, float alpha)

{

	byte			*dest, *source;

	unsigned short	*pusdest;

	int				v, u;

	glpic_t			*gl;

	if (scrap_dirty)

		Scrap_Upload ();

	gl = (glpic_t *)pic->data;

	glDisable(GL_ALPHA_TEST);

	glEnable (GL_BLEND);

//	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

//	glCullFace(GL_FRONT);

	glColor4f (1,1,1,alpha);

	GL_Bind (gl->texnum);

	glBegin (GL_QUADS);

	glTexCoord2f (gl->sl, gl->tl);

	glVertex2f (x, y);

	glTexCoord2f (gl->sh, gl->tl);

	glVertex2f (x+pic->width, y);

	glTexCoord2f (gl->sh, gl->th);

	glVertex2f (x+pic->width, y+pic->height);

	glTexCoord2f (gl->sl, gl->th);

	glVertex2f (x, y+pic->height);

	glEnd ();

	glColor4f (1,1,1,1);

	glEnable(GL_ALPHA_TEST);

	glDisable (GL_BLEND);

}

/*

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

Draw_Pic

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

*/

void Draw_Pic (int x, int y, qpic_t *pic)

{

	byte			*dest, *source;

	unsigned short	*pusdest;

	int				v, u;

	glpic_t			*gl;

	if (scrap_dirty)

		Scrap_Upload ();

	gl = (glpic_t *)pic->data;

	glColor4f (1,1,1,1);

	GL_Bind (gl->texnum);

	glBegin (GL_QUADS);

	glTexCoord2f (gl->sl, gl->tl);

	glVertex2f (x, y);

	glTexCoord2f (gl->sh, gl->tl);

	glVertex2f (x+pic->width, y);

	glTexCoord2f (gl->sh, gl->th);

	glVertex2f (x+pic->width, y+pic->height);

	glTexCoord2f (gl->sl, gl->th);

	glVertex2f (x, y+pic->height);

	glEnd ();

}

/*

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

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");

	}

	Draw_Pic (x, y, pic);

}

/*

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

Draw_TransPicTranslate

Only used for the player color selection menu

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

*/

void Draw_TransPicTranslate (int x, int y, qpic_t *pic, byte *translation)

{

	int				v, u, c;

	unsigned		trans[64*64], *dest;

	byte			*src;

	int				p;

	GL_Bind (translate_texture);

	c = pic->width * pic->height;

	dest = trans;

	for (v=0 ; v<64 ; v++, dest += 64)

	{

		src = &menuplyr_pixels[ ((v*pic->height)>>6) *pic->width];

		for (u=0 ; u<64 ; u++)

		{

			p = src[(u*pic->width)>>6];

			if (p == 255)

				dest[u] = p;

			else

				dest[u] =  d_8to24table[translation[p]];

		}

	}

	glTexImage2D (GL_TEXTURE_2D, 0, gl_alpha_format, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, trans);

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	glColor3f (1,1,1);

	glBegin (GL_QUADS);

	glTexCoord2f (0, 0);

	glVertex2f (x, y);

	glTexCoord2f (1, 0);

	glVertex2f (x+pic->width, y);

	glTexCoord2f (1, 1);

	glVertex2f (x+pic->width, y+pic->height);

	glTexCoord2f (0, 1);

	glVertex2f (x, y+pic->height);

	glEnd ();

}

/*

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

Draw_ConsoleBackground

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

*/

void Draw_ConsoleBackground (int lines)

{

	int y = (vid.height * 3) >> 2;

	if (lines > y)

		Draw_Pic(0, lines - vid.height, conback);

	else

		Draw_AlphaPic (0, lines - vid.height, conback, (float)(1.2 * lines)/y);

}

/*

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

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)

{

	glColor3f (1,1,1);

	GL_Bind (*(int *)draw_backtile->data);

	glBegin (GL_QUADS);

	glTexCoord2f (x/64.0, y/64.0);

	glVertex2f (x, y);

	glTexCoord2f ( (x+w)/64.0, y/64.0);

	glVertex2f (x+w, y);

	glTexCoord2f ( (x+w)/64.0, (y+h)/64.0);

	glVertex2f (x+w, y+h);

	glTexCoord2f ( x/64.0, (y+h)/64.0 );

	glVertex2f (x, y+h);

	glEnd ();

}

/*

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

Draw_Fill

Fills a box of pixels with a single color

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

*/

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

{

	glDisable (GL_TEXTURE_2D);

	glColor3f (host_basepal[c*3]/255.0,

		host_basepal[c*3+1]/255.0,

		host_basepal[c*3+2]/255.0);

	glBegin (GL_QUADS);

	glVertex2f (x,y);

	glVertex2f (x+w, y);

	glVertex2f (x+w, y+h);

	glVertex2f (x, y+h);

	glEnd ();

	glColor3f (1,1,1);

	glEnable (GL_TEXTURE_2D);

}

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

/*

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

Draw_FadeScreen

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

*/

void Draw_FadeScreen (void)

{

	glEnable (GL_BLEND);

	glDisable (GL_TEXTURE_2D);

	glColor4f (0, 0, 0, 0.8);

	glBegin (GL_QUADS);

	glVertex2f (0,0);

	glVertex2f (vid.width, 0);

	glVertex2f (vid.width, vid.height);

	glVertex2f (0, vid.height);

	glEnd ();

	glColor4f (1,1,1,1);

	glEnable (GL_TEXTURE_2D);

	glDisable (GL_BLEND);

	Sbar_Changed();

}

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

/*

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

Draw_BeginDisc

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

Call before beginning any disc IO.

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

*/

void Draw_BeginDisc (void)

{

	if (!draw_disc)

		return;

	glDrawBuffer  (GL_FRONT);

	Draw_Pic (vid.width - 24, 0, draw_disc);

	glDrawBuffer  (GL_BACK);

}

/*

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

Draw_EndDisc

Erases the disc icon.

Call after completing any disc IO

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

*/

void Draw_EndDisc (void)

{

}

/*

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

GL_Set2D

Setup as if the screen was 320*200

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

*/

void GL_Set2D (void)

{

	glViewport (glx, gly, glwidth, glheight);

	glMatrixMode(GL_PROJECTION);

    glLoadIdentity ();

	glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);

	glMatrixMode(GL_MODELVIEW);

    glLoadIdentity ();

	glDisable (GL_DEPTH_TEST);

	glDisable (GL_CULL_FACE);

	glDisable (GL_BLEND);

	glEnable (GL_ALPHA_TEST);

//	glDisable (GL_ALPHA_TEST);

	glColor4f (1,1,1,1);

}

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

/*

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

GL_FindTexture

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

*/

int GL_FindTexture (char *identifier)

{

	int		i;

	gltexture_t	*glt;

	for (i=0, glt=gltextures ; i

	{

		if (!strcmp (identifier, glt->identifier))

			return gltextures[i].texnum;

	}

	return -1;

}

/*

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

GL_ResampleTexture

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

*/

void GL_ResampleTexture (unsigned *in, int inwidth, int inheight, unsigned *out,  int outwidth, int outheight)

{

	int		i, j;

	unsigned	*inrow;

	unsigned	frac, fracstep;

	fracstep = inwidth*0x10000/outwidth;

	for (i=0 ; i

	{

		inrow = in + inwidth*(i*inheight/outheight);

		frac = fracstep >> 1;

		for (j=0 ; j

		{

			out[j] = inrow[frac>>16];

			frac += fracstep;

			out[j+1] = inrow[frac>>16];

			frac += fracstep;

			out[j+2] = inrow[frac>>16];

			frac += fracstep;

			out[j+3] = inrow[frac>>16];

			frac += fracstep;

		}

	}

}

/*

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

GL_Resample8BitTexture -- JACK

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

*/

void GL_Resample8BitTexture (unsigned char *in, int inwidth, int inheight, unsigned char *out,  int outwidth, int outheight)

{

	int		i, j;

	unsigned	char *inrow;

	unsigned	frac, fracstep;

	fracstep = inwidth*0x10000/outwidth;

	for (i=0 ; i

	{

		inrow = in + inwidth*(i*inheight/outheight);

		frac = fracstep >> 1;

		for (j=0 ; j

		{

			out[j] = inrow[frac>>16];

			frac += fracstep;

			out[j+1] = inrow[frac>>16];

			frac += fracstep;

			out[j+2] = inrow[frac>>16];

			frac += fracstep;

			out[j+3] = inrow[frac>>16];

			frac += fracstep;

		}

	}

}

/*

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

GL_MipMap

Operates in place, quartering the size of the texture

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

*/

void GL_MipMap (byte *in, int width, int height)

{

	int		i, j;

	byte	*out;

	width <<=2;

	height >>= 1;

	out = in;

	for (i=0 ; i

	{

		for (j=0 ; j

		{

			out[0] = (in[0] + in[4] + in[width+0] + in[width+4])>>2;

			out[1] = (in[1] + in[5] + in[width+1] + in[width+5])>>2;

			out[2] = (in[2] + in[6] + in[width+2] + in[width+6])>>2;

			out[3] = (in[3] + in[7] + in[width+3] + in[width+7])>>2;

		}

	}

}

/*

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

GL_MipMap8Bit

Mipping for 8 bit textures

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

*/

void GL_MipMap8Bit (byte *in, int width, int height)

{

	int		i, j;

	unsigned short     r,g,b;

	byte	*out, *at1, *at2, *at3, *at4;

//	width <<=2;

	height >>= 1;

	out = in;

	for (i=0 ; i

	{

		for (j=0 ; j

		{

			at1 = (byte *) (d_8to24table + in[0]);

			at2 = (byte *) (d_8to24table + in[1]);

			at3 = (byte *) (d_8to24table + in[width+0]);

			at4 = (byte *) (d_8to24table + in[width+1]);

 			r = (at1[0]+at2[0]+at3[0]+at4[0]); r>>=5;

 			g = (at1[1]+at2[1]+at3[1]+at4[1]); g>>=5;

 			b = (at1[2]+at2[2]+at3[2]+at4[2]); b>>=5;

			out[0] = d_15to8table[(r<<0) + (g<<5) + (b<<10)];

		}

	}

}

/*

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

GL_Upload32

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

*/

void GL_Upload32 (unsigned *data, int width, int height,  qboolean mipmap, qboolean alpha)

{

	int			samples;

static	unsigned	scaled[1024*512];	// [512*256];

	int			scaled_width, scaled_height;

	for (scaled_width = 1 ; scaled_width < width ; scaled_width<<=1)

		;

	for (scaled_height = 1 ; scaled_height < height ; scaled_height<<=1)

		;

	scaled_width >>= (int)gl_picmip.value;

	scaled_height >>= (int)gl_picmip.value;

	if (scaled_width > gl_max_size.value)

		scaled_width = gl_max_size.value;

	if (scaled_height > gl_max_size.value)

		scaled_height = gl_max_size.value;

	if (scaled_width * scaled_height > sizeof(scaled)/4)

		Sys_Error ("GL_LoadTexture: too big");

	samples = alpha ? gl_alpha_format : gl_solid_format;

#if 0

	if (mipmap)

		gluBuild2DMipmaps (GL_TEXTURE_2D, samples, width, height, GL_RGBA, GL_UNSIGNED_BYTE, trans);

	else if (scaled_width == width && scaled_height == height)

		glTexImage2D (GL_TEXTURE_2D, 0, samples, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, trans);

	else

	{

		gluScaleImage (GL_RGBA, width, height, GL_UNSIGNED_BYTE, trans,

			scaled_width, scaled_height, GL_UNSIGNED_BYTE, scaled);

		glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);

	}

#else

texels += scaled_width * scaled_height;

	if (scaled_width == width && scaled_height == height)

	{

		if (!mipmap)

		{

			glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);

			goto done;

		}

		memcpy (scaled, data, width*height*4);

	}

	else

		GL_ResampleTexture (data, width, height, scaled, scaled_width, scaled_height);

	glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);

	if (mipmap)

	{

		int		miplevel;

		miplevel = 0;

		while (scaled_width > 1 || scaled_height > 1)

		{

			GL_MipMap ((byte *)scaled, scaled_width, scaled_height);

			scaled_width >>= 1;

			scaled_height >>= 1;

			if (scaled_width < 1)

				scaled_width = 1;

			if (scaled_height < 1)

				scaled_height = 1;

			miplevel++;

			glTexImage2D (GL_TEXTURE_2D, miplevel, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);

		}

	}

done: ;

#endif

	if (mipmap)

	{

		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);

		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);

	}

	else

	{

		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);

		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);

	}

}

void GL_Upload8_EXT (byte *data, int width, int height,  qboolean mipmap, qboolean alpha)

{

	int			i, s;

	qboolean	noalpha;

	int			p;

	static unsigned j;

	int			samples;

    static	unsigned char scaled[1024*512];	// [512*256];

	int			scaled_width, scaled_height;

	s = width*height;

	// if there are no transparent pixels, make it a 3 component

	// texture even if it was specified as otherwise

	if (alpha)

	{

		noalpha = true;

		for (i=0 ; i

		{

			if (data[i] == 255)

				noalpha = false;

		}

		if (alpha && noalpha)

			alpha = false;

	}

	for (scaled_width = 1 ; scaled_width < width ; scaled_width<<=1)

		;

	for (scaled_height = 1 ; scaled_height < height ; scaled_height<<=1)

		;

	scaled_width >>= (int)gl_picmip.value;

	scaled_height >>= (int)gl_picmip.value;

	if (scaled_width > gl_max_size.value)

		scaled_width = gl_max_size.value;

	if (scaled_height > gl_max_size.value)

		scaled_height = gl_max_size.value;

	if (scaled_width * scaled_height > sizeof(scaled))