/*
Copyright (C) 1997-2001 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.

*/

// r_image.c

#include "r_local.h"
//#include "r_cin.h"

#ifdef __unix__
#include <jpeglib.h>
#include <png.h>
#else
#include "include/jpeglib.h"
#endif

image_t		gltextures[MAX_GLTEXTURES];
int			numgltextures;
int			base_textureid;		// gltextures[i] = base_textureid+i

static byte			 intensitytable[256];
static unsigned char gammatable[256];

cvar_t		*intensity;

unsigned	d_8to24table[256];
float		d_8to24tablef[256][3]; //Knightmare- MrG's Vertex array stuff

qboolean GL_Upload8 (byte *data, int width, int height,  qboolean mipmap, qboolean is_sky );
qboolean GL_Upload32 (unsigned *data, int width, int height,  qboolean mipmap);


int		gl_solid_format = 3;
int		gl_alpha_format = 4;

int		gl_tex_solid_format = 3;
int		gl_tex_alpha_format = 4;

// Knightmare- default to trilinear filtering, thnx to MrG
// removed because this causes problems on some vidcards
int		gl_filter_min = GL_LINEAR_MIPMAP_NEAREST;
int		gl_filter_max = GL_LINEAR;

void GL_SetTexturePalette( unsigned palette[256] )
{
	int i;
	unsigned char temptable[768];

	if ( qglColorTableEXT )//&& gl_ext_palettedtexture->value )
	{
		for ( i = 0; i < 256; i++ )
		{
			temptable[i*3+0] = ( palette[i] >> 0 ) & 0xff;
			temptable[i*3+1] = ( palette[i] >> 8 ) & 0xff;
			temptable[i*3+2] = ( palette[i] >> 16 ) & 0xff;
		}

		qglColorTableEXT( GL_SHARED_TEXTURE_PALETTE_EXT,
						   GL_RGB,
						   256,
						   GL_RGB,
						   GL_UNSIGNED_BYTE,
						   temptable );
	}
}

// Knightmare- added some of Psychospaz's shortcuts
GLenum bFunc1 = -1;
GLenum bFunc2 = -1;
void GL_BlendFunction (GLenum sfactor, GLenum dfactor)
{
	if (sfactor!=bFunc1 || dfactor!=bFunc2)
	{
		bFunc1 = sfactor;
		bFunc2 = dfactor;

		qglBlendFunc(bFunc1, bFunc2);
	}
}

GLenum shadeModelMode = -1;

void GL_ShadeModel (GLenum mode)
{
	if (mode!=shadeModelMode)
	{
		shadeModelMode = mode;
		qglShadeModel(mode);
	}
}
// end Knightmare

void GL_EnableMultitexture( qboolean enable )
{
	if ( !qglSelectTextureSGIS && !qglActiveTextureARB )
		return;

	if ( enable )
	{
		GL_SelectTexture( GL_TEXTURE1 );
		qglEnable( GL_TEXTURE_2D );
		GL_TexEnv( GL_REPLACE );
	}
	else
	{
		GL_SelectTexture( GL_TEXTURE1 );
		qglDisable( GL_TEXTURE_2D );
		GL_TexEnv( GL_REPLACE );
	}
	GL_SelectTexture( GL_TEXTURE0 );
	GL_TexEnv( GL_REPLACE );
}

void GL_SelectTexture( GLenum texture )
{
	int tmu;

	if ( !qglSelectTextureSGIS && !qglActiveTextureARB )
		return;

	if ( texture == GL_TEXTURE0 )
	{
		tmu = 0;
	}
	else
	{
		tmu = 1;
	}

	if ( tmu == gl_state.currenttmu )
	{
		return;
	}

	gl_state.currenttmu = tmu;

	if ( qglSelectTextureSGIS )
	{
		qglSelectTextureSGIS( texture );
	}
	else if ( qglActiveTextureARB )
	{
		qglActiveTextureARB( texture );
		qglClientActiveTextureARB( texture );
	}
}

void GL_TexEnv( GLenum mode )
{
	static int lastmodes[2] = { -1, -1 };

	if ( mode != lastmodes[gl_state.currenttmu] )
	{
		qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, mode );
		lastmodes[gl_state.currenttmu] = mode;
	}
}

void GL_Bind (int texnum)
{
	extern	image_t	*draw_chars;

	if (gl_nobind->value && draw_chars)		// performance evaluation option
		texnum = draw_chars->texnum;
	if ( gl_state.currenttextures[gl_state.currenttmu] == texnum)
		return;
	gl_state.currenttextures[gl_state.currenttmu] = texnum;
	qglBindTexture (GL_TEXTURE_2D, texnum);
}

void GL_MBind( GLenum target, int texnum )
{
	GL_SelectTexture( target );
	if ( target == GL_TEXTURE0 )
	{
		if ( gl_state.currenttextures[0] == texnum )
			return;
	}
	else
	{
		if ( gl_state.currenttextures[1] == texnum )
			return;
	}
	GL_Bind( texnum );
}

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}
};

#define NUM_GL_MODES (sizeof(modes) / sizeof (glmode_t))

typedef struct
{
	char *name;
	int mode;
} gltmode_t;

gltmode_t gl_alpha_modes[] = {
	{"default", 4},
	{"GL_RGBA", GL_RGBA},
	{"GL_RGBA8", GL_RGBA8},
	{"GL_RGB5_A1", GL_RGB5_A1},
	{"GL_RGBA4", GL_RGBA4},
	{"GL_RGBA2", GL_RGBA2},
};

#define NUM_GL_ALPHA_MODES (sizeof(gl_alpha_modes) / sizeof (gltmode_t))

gltmode_t gl_solid_modes[] = {
	{"default", 3},
	{"GL_RGB", GL_RGB},
	{"GL_RGB8", GL_RGB8},
	{"GL_RGB5", GL_RGB5},
	{"GL_RGB4", GL_RGB4},
	{"GL_R3_G3_B2", GL_R3_G3_B2},
#ifdef GL_RGB2_EXT
	{"GL_RGB2", GL_RGB2_EXT},
#endif
};

#define NUM_GL_SOLID_MODES (sizeof(gl_solid_modes) / sizeof (gltmode_t))

/*
===============
GL_TextureMode
===============
*/
void GL_TextureMode( char *string )
{
	int		i;
	image_t	*glt;

	for (i=0 ; i< NUM_GL_MODES ; i++)
	{
		if ( !Q_stricmp( modes[i].name, string ) )
			break;
	}

	if (i == NUM_GL_MODES)
	{
		VID_Printf (PRINT_ALL, "bad filter name\n");
		return;
	}

	gl_filter_min = modes[i].minimize;
	gl_filter_max = modes[i].maximize;

	// clamp selected anisotropy
	if (gl_config.anisotropic)
	{
		if (gl_anisotropic->value > gl_config.max_anisotropy)
			Cvar_SetValue("gl_anisotropic", gl_config.max_anisotropy);
		else if (gl_anisotropic->value < 1.0)
			Cvar_SetValue("gl_anisotropic", 1.0);
	}

	// change all the existing mipmap texture objects
	for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
	{
		if (glt->type != it_pic && glt->type != it_sky )
		{
			GL_Bind (glt->texnum);
			qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
			qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);

			// Set anisotropic filter if supported and enabled
			if (gl_config.anisotropic && gl_anisotropic->value)
			{
				qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, gl_anisotropic->value);
				//GLfloat largest_supported_anisotropy;
				//qglGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &largest_supported_anisotropy);
				//qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, largest_supported_anisotropy);
			}
		}
	}
}

/*
===============
GL_TextureAlphaMode
===============
*/
void GL_TextureAlphaMode( char *string )
{
	int		i;

	for (i=0 ; i< NUM_GL_ALPHA_MODES ; i++)
	{
		if ( !Q_stricmp( gl_alpha_modes[i].name, string ) )
			break;
	}

	if (i == NUM_GL_ALPHA_MODES)
	{
		VID_Printf (PRINT_ALL, "bad alpha texture mode name\n");
		return;
	}

	gl_tex_alpha_format = gl_alpha_modes[i].mode;
}

/*
===============
GL_TextureSolidMode
===============
*/
void GL_TextureSolidMode( char *string )
{
	int		i;

	for (i=0 ; i< NUM_GL_SOLID_MODES ; i++)
	{
		if ( !Q_stricmp( gl_solid_modes[i].name, string ) )
			break;
	}

	if (i == NUM_GL_SOLID_MODES)
	{
		VID_Printf (PRINT_ALL, "bad solid texture mode name\n");
		return;
	}

	gl_tex_solid_format = gl_solid_modes[i].mode;
}

/*
===============
GL_ImageList_f
===============
*/
void	GL_ImageList_f (void)
{
	int		i;
	image_t	*image;
	int		texels;
	const char *palstrings[2] =
	{
		"RGB",
		"PAL"
	};

	VID_Printf (PRINT_ALL, "------------------\n");
	texels = 0;

	for (i=0, image=gltextures; i<numgltextures; i++, image++)
	{
		if (image->texnum <= 0)
			continue;
		texels += image->upload_width*image->upload_height;
		switch (image->type)
		{
		case it_skin:
			VID_Printf (PRINT_ALL, "M");
			break;
		case it_sprite:
			VID_Printf (PRINT_ALL, "S");
			break;
		case it_wall:
			VID_Printf (PRINT_ALL, "W");
			break;
		case it_pic:
			VID_Printf (PRINT_ALL, "P");
			break;
		default:
			VID_Printf (PRINT_ALL, " ");
			break;
		}

		VID_Printf (PRINT_ALL,  " %3i %3i %s: %s\n",
			image->upload_width, image->upload_height, palstrings[image->paletted], image->name);
	}
	VID_Printf (PRINT_ALL, "Total texel count (not counting mipmaps): %i\n", texels);
}


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

  scrap allocation

  Allocate all the little status bar obejcts into a single texture
  to crutch up inefficient hardware / drivers

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

#define	MAX_SCRAPS		1
#define	BLOCK_WIDTH		256
#define	BLOCK_HEIGHT	256

int			scrap_allocated[MAX_SCRAPS][BLOCK_WIDTH];
byte		scrap_texels[MAX_SCRAPS][BLOCK_WIDTH*BLOCK_HEIGHT];
qboolean	scrap_dirty;

// 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		texnum;

	for (texnum=0 ; texnum<MAX_SCRAPS ; texnum++)
	{
		best = BLOCK_HEIGHT;

		for (i=0 ; i<BLOCK_WIDTH-w ; i++)
		{
			best2 = 0;

			for (j=0 ; j<w ; 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<w ; i++)
			scrap_allocated[texnum][*x + i] = best + h;

		return texnum;
	}

	return -1;
//	Sys_Error ("Scrap_AllocBlock: full");
}

int	scrap_uploads;

void Scrap_Upload (void)
{
	scrap_uploads++;
	GL_Bind(TEXNUM_SCRAPS);
	GL_Upload8 (scrap_texels[0], BLOCK_WIDTH, BLOCK_HEIGHT, false, false );
	scrap_dirty = false;
}

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

PCX LOADING

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


/*
==============
LoadPCX
==============
*/
void LoadPCX (char *filename, byte **pic, byte **palette, int *width, int *height)
{
	byte	*raw;
	pcx_t	*pcx;
	int		x, y;
	int		len;
	int		dataByte, runLength;
	byte	*out, *pix;

	*pic = NULL;
	*palette = NULL;

	//
	// load the file
	//
	len = FS_LoadFile (filename, (void **)&raw);
	if (!raw)
	{
		VID_Printf (PRINT_DEVELOPER, "Bad pcx file %s\n", filename);
		return;
	}

	//
	// parse the PCX file
	//
	pcx = (pcx_t *)raw;

    pcx->xmin = LittleShort(pcx->xmin);
    pcx->ymin = LittleShort(pcx->ymin);
    pcx->xmax = LittleShort(pcx->xmax);
    pcx->ymax = LittleShort(pcx->ymax);
    pcx->hres = LittleShort(pcx->hres);
    pcx->vres = LittleShort(pcx->vres);
    pcx->bytes_per_line = LittleShort(pcx->bytes_per_line);
    pcx->palette_type = LittleShort(pcx->palette_type);

	raw = &pcx->data;

	if (pcx->manufacturer != 0x0a
		|| pcx->version != 5
		|| pcx->encoding != 1
		|| pcx->bits_per_pixel != 8
		|| pcx->xmax >= 640
		|| pcx->ymax >= 480)
	{
		VID_Printf (PRINT_ALL, "Bad pcx file %s\n", filename);
		return;
	}

	out = malloc ( (pcx->ymax+1) * (pcx->xmax+1) );

	*pic = out;

	pix = out;

	if (palette)
	{
		*palette = malloc(768);
		memcpy (*palette, (byte *)pcx + len - 768, 768);
	}

	if (width)
		*width = pcx->xmax+1;
	if (height)
		*height = pcx->ymax+1;

	for (y=0 ; y<=pcx->ymax ; y++, pix += pcx->xmax+1)
	{
		for (x=0 ; x<=pcx->xmax ; )
		{
			dataByte = *raw++;

			if((dataByte & 0xC0) == 0xC0)
			{
				runLength = dataByte & 0x3F;
				dataByte = *raw++;
			}
			else
				runLength = 1;

			while(runLength-- > 0)
				pix[x++] = dataByte;
		}

	}

	if ( raw - (byte *)pcx > len)
	{
		VID_Printf (PRINT_DEVELOPER, "PCX file %s was malformed", filename);
		free (*pic);
		*pic = NULL;
	}

	FS_FreeFile (pcx);
}

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

TARGA LOADING

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

typedef struct _TargaHeader {
	unsigned char 	id_length, colormap_type, image_type;
	unsigned short	colormap_index, colormap_length;
	unsigned char	colormap_size;
	unsigned short	x_origin, y_origin, width, height;
	unsigned char	pixel_size, attributes;
} TargaHeader;


/*
=============
LoadTGA
=============
*/
void LoadTGA (char *name, byte **pic, int *width, int *height)
{
	int		columns, rows, numPixels;
	byte	*pixbuf;
	int		row, column;
	byte	*buf_p;
	byte	*buffer;
	int		length;
	TargaHeader		targa_header;
	byte			*targa_rgba;
	byte tmp[2];

	*pic = NULL;

	//
	// load the file
	//
	length = FS_LoadFile (name, (void **)&buffer);
	if (!buffer)
	{	// Knightmare- removed this because it spams the console
		//VID_Printf (PRINT_DEVELOPER, "Bad tga file %s\n", name);
		return;
	}

	buf_p = buffer;

	targa_header.id_length = *buf_p++;
	targa_header.colormap_type = *buf_p++;
	targa_header.image_type = *buf_p++;
	
	tmp[0] = buf_p[0];
	tmp[1] = buf_p[1];
	targa_header.colormap_index = LittleShort ( *((short *)tmp) );
	buf_p+=2;
	tmp[0] = buf_p[0];
	tmp[1] = buf_p[1];
	targa_header.colormap_length = LittleShort ( *((short *)tmp) );
	buf_p+=2;
	targa_header.colormap_size = *buf_p++;
	targa_header.x_origin = LittleShort ( *((short *)buf_p) );
	buf_p+=2;
	targa_header.y_origin = LittleShort ( *((short *)buf_p) );
	buf_p+=2;
	targa_header.width = LittleShort ( *((short *)buf_p) );
	buf_p+=2;
	targa_header.height = LittleShort ( *((short *)buf_p) );
	buf_p+=2;
	targa_header.pixel_size = *buf_p++;
	targa_header.attributes = *buf_p++;

	// Knightmare- check for bad data
	if (!targa_header.width || !targa_header.height) {
		VID_Printf (PRINT_ALL, "Bad tga file %s\n", name);
		FS_FreeFile (buffer);
		return;
	}

	if (targa_header.image_type != 2 
		&& targa_header.image_type != 10) {
	//	VID_Error (ERR_DROP, "LoadTGA: Only type 2 and 10 targa RGB images supported\n");
		VID_Printf (PRINT_ALL, "LoadTGA: %s has wrong image format; only type 2 and 10 targa RGB images supported.\n", name);
		FS_FreeFile (buffer);
		return;
	}

	if (targa_header.colormap_type !=0 
		|| (targa_header.pixel_size!=32 && targa_header.pixel_size!=24)) {
	//	VID_Error (ERR_DROP, "LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
		VID_Printf (PRINT_ALL, "LoadTGA: %s has wrong image format; only 32 or 24 bit images supported (no colormaps).\n", name);
		FS_FreeFile (buffer);
		return;
	}

	columns = targa_header.width;
	rows = targa_header.height;
	numPixels = columns * rows;

	if (width)
		*width = columns;
	if (height)
		*height = rows;

	targa_rgba = malloc (numPixels*4);
	*pic = targa_rgba;

	if (targa_header.id_length != 0)
		buf_p += targa_header.id_length;  // skip TARGA image comment
	
	if (targa_header.image_type==2) {  // Uncompressed, RGB images
		for(row=rows-1; row>=0; row--) {
			pixbuf = targa_rgba + row*columns*4;
			for(column=0; column<columns; column++) {
				unsigned char red,green,blue,alphabyte;
				switch (targa_header.pixel_size) {
					case 24:
							
							blue = *buf_p++;
							green = *buf_p++;
							red = *buf_p++;
							*pixbuf++ = red;
							*pixbuf++ = green;
							*pixbuf++ = blue;
							*pixbuf++ = 255;
							break;
					case 32:
							blue = *buf_p++;
							green = *buf_p++;
							red = *buf_p++;
							alphabyte = *buf_p++;
							*pixbuf++ = red;
							*pixbuf++ = green;
							*pixbuf++ = blue;
							*pixbuf++ = alphabyte;
							break;
				}
			}
		}
	}
	else if (targa_header.image_type==10) {   // Runlength encoded RGB images
		unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j;
		for(row=rows-1; row>=0; row--) {
			pixbuf = targa_rgba + row*columns*4;
			for(column=0; column<columns; ) {
				packetHeader= *buf_p++;
				packetSize = 1 + (packetHeader & 0x7f);
				if (packetHeader & 0x80) {        // run-length packet
					switch (targa_header.pixel_size) {
						case 24:
								blue = *buf_p++;
								green = *buf_p++;
								red = *buf_p++;
								alphabyte = 255;
								break;
						case 32:
								blue = *buf_p++;
								green = *buf_p++;
								red = *buf_p++;
								alphabyte = *buf_p++;
								break;
					}
	
					for(j=0;j<packetSize;j++) {
						*pixbuf++=red;
						*pixbuf++=green;
						*pixbuf++=blue;
						*pixbuf++=alphabyte;
						column++;
						if (column==columns) { // run spans across rows
							column=0;
							if (row>0)
								row--;
							else
								goto breakOut;
							pixbuf = targa_rgba + row*columns*4;
						}
					}
				}
				else {                            // non run-length packet
					for(j=0;j<packetSize;j++) {
						switch (targa_header.pixel_size) {
							case 24:
									blue = *buf_p++;
									green = *buf_p++;
									red = *buf_p++;
									*pixbuf++ = red;
									*pixbuf++ = green;
									*pixbuf++ = blue;
									*pixbuf++ = 255;
									break;
							case 32:
									blue = *buf_p++;
									green = *buf_p++;
									red = *buf_p++;
									alphabyte = *buf_p++;
									*pixbuf++ = red;
									*pixbuf++ = green;
									*pixbuf++ = blue;
									*pixbuf++ = alphabyte;
									break;
						}
						column++;
						if (column==columns) { // pixel packet run spans across rows
							column=0;
							if (row>0)
								row--;
							else
								goto breakOut;
							pixbuf = targa_rgba + row*columns*4;
						}						
					}
				}
			}
			breakOut:;
		}
	}

	FS_FreeFile (buffer);
}

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

JPEG LOADING

By Robert 'Heffo' Heffernan

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

void jpg_null(j_decompress_ptr cinfo)
{
}
#ifdef __unix__
boolean jpg_fill_input_buffer(j_decompress_ptr cinfo)
{
    VID_Printf(PRINT_ALL, "Premature end of JPEG data\n");
    return 1;
}
#else
unsigned char jpg_fill_input_buffer(j_decompress_ptr cinfo)
{
    VID_Printf(PRINT_ALL, "Premature end of JPEG data\n");
    return 1;
}
#endif
void jpg_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
{
        
    cinfo->src->next_input_byte += (size_t) num_bytes;
    cinfo->src->bytes_in_buffer -= (size_t) num_bytes;

    if (cinfo->src->bytes_in_buffer < 0) 
		VID_Printf(PRINT_ALL, "Premature end of JPEG data\n");
}

void jpeg_mem_src(j_decompress_ptr cinfo, byte *mem, int len)
{
    cinfo->src = (struct jpeg_source_mgr *)(*cinfo->mem->alloc_small)((j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof(struct jpeg_source_mgr));
    cinfo->src->init_source = jpg_null;
    cinfo->src->fill_input_buffer = jpg_fill_input_buffer;
    cinfo->src->skip_input_data = jpg_skip_input_data;
    cinfo->src->resync_to_restart = jpeg_resync_to_restart;
    cinfo->src->term_source = jpg_null;
    cinfo->src->bytes_in_buffer = len;
    cinfo->src->next_input_byte = mem;
}

#define DSTATE_START	200	/* after create_decompress */
#define DSTATE_INHEADER	201	/* reading header markers, no SOS yet */

/*
==============
LoadJPG
==============
*/
void LoadJPG (char *filename, byte **pic, int *width, int *height)
{
	struct jpeg_decompress_struct	cinfo;
	struct jpeg_error_mgr			jerr;
	byte							*rawdata, *rgbadata, *scanline, *p, *q;
	int								rawsize, i;

	// Load JPEG file into memory
	rawsize = FS_LoadFile(filename, (void **)&rawdata);
	if (!rawdata)
	{
	//VID_Printf (PRINT_DEVELOPER, "Bad jpg file %s\n", filename);
		return;	
	}

	// Knightmare- check for bad data
	if (	rawdata[6] != 'J'
		||	rawdata[7] != 'F'
		||	rawdata[8] != 'I'
		||	rawdata[9] != 'F') {
	//	VID_Printf (PRINT_ALL, "Bad jpg file %s\n", filename);
		FS_FreeFile(rawdata);
		return;
	}

	// Initialise libJpeg Object
	cinfo.err = jpeg_std_error(&jerr);
	jpeg_create_decompress(&cinfo);

	// Feed JPEG memory into the libJpeg Object
	jpeg_mem_src(&cinfo, rawdata, rawsize);

	// Process JPEG header
	jpeg_read_header(&cinfo, true); // bombs out here

	// Start Decompression
	jpeg_start_decompress(&cinfo);

	// Check Color Components
	if(cinfo.output_components != 3)
	{
		VID_Printf(PRINT_ALL, "Invalid JPEG color components\n");
		jpeg_destroy_decompress(&cinfo);
		FS_FreeFile(rawdata);
		return;
	}

	// Allocate Memory for decompressed image
	rgbadata = malloc(cinfo.output_width * cinfo.output_height * 4);
	if(!rgbadata)
	{
		VID_Printf(PRINT_ALL, "Insufficient RAM for JPEG buffer\n");
		jpeg_destroy_decompress(&cinfo);
		FS_FreeFile(rawdata);
		return;
	}

	// Pass sizes to output
	*width = cinfo.output_width; *height = cinfo.output_height;

	// Allocate Scanline buffer
	scanline = malloc(cinfo.output_width * 3);
	if(!scanline)
	{
		VID_Printf(PRINT_ALL, "Insufficient RAM for JPEG scanline buffer\n");
		free(rgbadata);
		jpeg_destroy_decompress(&cinfo);
		FS_FreeFile(rawdata);
		return;
	}

	// Read Scanlines, and expand from RGB to RGBA
	q = rgbadata;
	while(cinfo.output_scanline < cinfo.output_height)
	{
		p = scanline;
		jpeg_read_scanlines(&cinfo, &scanline, 1);

		for(i=0; i<cinfo.output_width; i++)
		{
			q[0] = p[0];
			q[1] = p[1];
			q[2] = p[2];
			q[3] = 255;

			p+=3; q+=4;
		}
	}

	// Free the scanline buffer
	free(scanline);

	// Finish Decompression
	jpeg_finish_decompress(&cinfo);

	// Destroy JPEG object
	jpeg_destroy_decompress(&cinfo);

	// Return the 'rgbadata'
	*pic = rgbadata;
}


#if defined (__unix__)
/*
 * =============================================================
 *
 * PNG STUFF
 *
 * =============================================================
 */

typedef struct png_s {			/* TPng = class(TGraphic) */
	char           *tmpBuf;
	int		tmpi;
	long		FBgColor;	/* DL Background color Added 30/05/2000 */
	int		FTransparent;	/* DL Is this Image Transparent Added 30/05/2000 */
	long		FRowBytes;	/* DL Added 30/05/2000 */
	double		FGamma;		/* DL Added 07/06/2000 */
	double		FScreenGamma;	/* DL Added 07/06/2000 */
	char           *FRowPtrs;	/* DL Changed for consistancy 30/05/2000   */
	char           *Data;		/* property Data: pByte read fData; */
	char           *Title;
	char           *Author;
	char           *Description;
	int		BitDepth;
	int		BytesPerPixel;
	int		ColorType;
	unsigned long	Height;
	unsigned long	Width;
	int		Interlace;
	int		Compression;
	int		Filter;
	double		LastModified;
	int		Transparent;
} png_t;

png_t          *my_png = 0;
unsigned char  *pngbytes;

void
InitializeDemData()
{
	long           *cvaluep;/* ub */
	long		y;

	/* Initialize Data and RowPtrs */
	if (my_png->Data) {
		free(my_png->Data);
		my_png->Data = 0;
	}
	if (my_png->FRowPtrs) {
		free(my_png->FRowPtrs);
		my_png->FRowPtrs = 0;
	}
	my_png->Data = malloc(my_png->Height * my_png->FRowBytes);	/* DL Added 30/5/2000 */
	my_png->FRowPtrs = malloc(sizeof(void *) * my_png->Height);

	if ((my_png->Data) && (my_png->FRowPtrs)) {
		cvaluep = (long *)my_png->FRowPtrs;
		for (y = 0; y < my_png->Height; y++) {
			cvaluep[y] = (long)my_png->Data + (y * (long)my_png->FRowBytes);	/* DL Added 08/07/2000       */
		}
	}
}

void
mypng_struct_create()
{
	if (my_png)
		return;
	my_png = malloc(sizeof(png_t));
	my_png->Data = 0;
	my_png->FRowPtrs = 0;
	my_png->Height = 0;
	my_png->Width = 0;
	my_png->ColorType = PNG_COLOR_TYPE_RGB;
	my_png->Interlace = PNG_INTERLACE_NONE;
	my_png->Compression = PNG_COMPRESSION_TYPE_DEFAULT;
	my_png->Filter = PNG_FILTER_TYPE_DEFAULT;
}

void
mypng_struct_destroy(qboolean keepData)
{
	if (!my_png)
		return;
	if (my_png->Data && !keepData)
		free(my_png->Data);
	if (my_png->FRowPtrs)
		free(my_png->FRowPtrs);
	free(my_png);
	my_png = 0;
}

/*
 * =============================================================
 *
 * fReadData
 *
 * =============================================================
 */

void PNGAPI
fReadData(png_structp png, png_bytep data, png_size_t length)
{				/* called by pnglib */
	int		i;

	for (i = 0; i < length; i++)
		data[i] = my_png->tmpBuf[my_png->tmpi++];	/* give pnglib a some more bytes   */
}


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

  LoadPNG

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

void
LoadPNG(char *filename, byte ** pic, int *width, int *height)
{
	png_structp	png;
	png_infop	pnginfo;
	byte		ioBuffer  [8192];
	int		len;
	byte           *raw;

	*pic = 0;

	len = FS_LoadFile(filename, (void **)&raw);

	if (!raw) {
		//VID_Printf(PRINT_DEVELOPER, "Bad png file %s\n", filename);
		return;
	}
	if (png_sig_cmp(raw, 0, 4))
		return;

	png = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
	if (!png)
		return;

	pnginfo = png_create_info_struct(png);

	if (!pnginfo) {
		png_destroy_read_struct(&png, &pnginfo, 0);
		return;
	}
	png_set_sig_bytes(png, 0 /* sizeof( sig ) */ );

	mypng_struct_create();	/* creates the my_png struct */

	my_png->tmpBuf = (char *)raw;	/* buf = whole file content */
	my_png->tmpi = 0;

	png_set_read_fn(png, ioBuffer, fReadData);

	png_read_info(png, pnginfo);

	png_get_IHDR(png, pnginfo, &my_png->Width, &my_png->Height, &my_png->BitDepth, &my_png->ColorType, &my_png->Interlace, &my_png->Compression, &my_png->Filter);
	/* ...removed bgColor code here... */

	if (my_png->ColorType == PNG_COLOR_TYPE_PALETTE)
		png_set_palette_to_rgb(png);
	if (my_png->ColorType == PNG_COLOR_TYPE_GRAY && my_png->BitDepth < 8)
		png_set_gray_1_2_4_to_8(png);

	/* Add alpha channel if present */
	if (png_get_valid(png, pnginfo, PNG_INFO_tRNS))
		png_set_tRNS_to_alpha(png);

	/* hax: expand 24bit to 32bit */
	if (my_png->BitDepth == 8 && my_png->ColorType == PNG_COLOR_TYPE_RGB)
		png_set_filler(png, 255, PNG_FILLER_AFTER);

	if ((my_png->ColorType == PNG_COLOR_TYPE_GRAY) || (my_png->ColorType == PNG_COLOR_TYPE_GRAY_ALPHA))
		png_set_gray_to_rgb(png);


	if (my_png->BitDepth < 8)
		png_set_expand(png);

	/* update the info structure */
	png_read_update_info(png, pnginfo);

	my_png->FRowBytes = png_get_rowbytes(png, pnginfo);
	my_png->BytesPerPixel = png_get_channels(png, pnginfo);	/* DL Added 30/08/2000 */

	InitializeDemData();
	if ((my_png->Data) && (my_png->FRowPtrs))
		png_read_image(png, (png_bytepp) my_png->FRowPtrs);

	png_read_end(png, pnginfo);	/* read last information chunks */

	png_destroy_read_struct(&png, &pnginfo, 0);


	/* only load 32 bit by now... */
	if (my_png->BitDepth == 8) {
		*pic = (byte *)my_png->Data;
		*width = my_png->Width;
		*height = my_png->Height;
	} else {
		//VID_Printf(PRINT_DEVELOPER, "Bad png color depth: %s\n", filename);
		*pic = NULL;
		free(my_png->Data);
	}

	mypng_struct_destroy(true);
	FS_FreeFile((void *)raw);
}
#endif

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

IMAGE FLOOD FILLING

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


/*
=================
Mod_FloodFillSkin

Fill background pixels so mipmapping doesn't have haloes
=================
*/

typedef struct
{
	short		x, y;
} floodfill_t;

// must be a power of 2
#define FLOODFILL_FIFO_SIZE 0x1000
#define FLOODFILL_FIFO_MASK (FLOODFILL_FIFO_SIZE - 1)

#define FLOODFILL_STEP( off, dx, dy ) \
{ \
	if (pos[off] == fillcolor) \
	{ \
		pos[off] = 255; \
		fifo[inpt].x = x + (dx), fifo[inpt].y = y + (dy); \
		inpt = (inpt + 1) & FLOODFILL_FIFO_MASK; \
	} \
	else if (pos[off] != 255) fdc = pos[off]; \
}

void R_FloodFillSkin( byte *skin, int skinwidth, int skinheight )
{
	byte				fillcolor = *skin; // assume this is the pixel to fill
	floodfill_t			fifo[FLOODFILL_FIFO_SIZE];
	int					inpt = 0, outpt = 0;
	int					filledcolor = -1;
	int					i;

	if (filledcolor == -1)
	{
		filledcolor = 0;
		// attempt to find opaque black
		for (i = 0; i < 256; ++i)
			if (d_8to24table[i] == (255 << 0)) // alpha 1.0
			{
				filledcolor = i;
				break;
			}
	}

	// can't fill to filled color or to transparent color (used as visited marker)
	if ((fillcolor == filledcolor) || (fillcolor == 255))
	{
		//printf( "not filling skin from %d to %d\n", fillcolor, filledcolor );
		return;
	}

	fifo[inpt].x = 0, fifo[inpt].y = 0;
	inpt = (inpt + 1) & FLOODFILL_FIFO_MASK;

	while (outpt != inpt)
	{
		int			x = fifo[outpt].x, y = fifo[outpt].y;
		int			fdc = filledcolor;
		byte		*pos = &skin[x + skinwidth * y];

		outpt = (outpt + 1) & FLOODFILL_FIFO_MASK;

		if (x > 0)				FLOODFILL_STEP( -1, -1, 0 );
		if (x < skinwidth - 1)	FLOODFILL_STEP( 1, 1, 0 );
		if (y > 0)				FLOODFILL_STEP( -skinwidth, 0, -1 );
		if (y < skinheight - 1)	FLOODFILL_STEP( skinwidth, 0, 1 );
		skin[x + skinwidth * y] = fdc;
	}
}

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



/*
================
GL_ResampleTextureLerpLine
from DarkPlaces
================
*/

void GL_ResampleTextureLerpLine (byte *in, byte *out, int inwidth, int outwidth) 
{ 
	int j, xi, oldx = 0, f, fstep, l1, l2, endx;

	fstep = (int) (inwidth*65536.0f/outwidth); 
	endx = (inwidth-1); 
	for (j = 0,f = 0;j < outwidth;j++, f += fstep) 
	{ 
		xi = (int) f >> 16; 
		if (xi != oldx) 
		{ 
			in += (xi - oldx) * 4; 
			oldx = xi; 
		} 
		if (xi < endx) 
		{ 
			l2 = f & 0xFFFF; 
			l1 = 0x10000 - l2; 
			*out++ = (byte) ((in[0] * l1 + in[4] * l2) >> 16);
			*out++ = (byte) ((in[1] * l1 + in[5] * l2) >> 16); 
			*out++ = (byte) ((in[2] * l1 + in[6] * l2) >> 16); 
			*out++ = (byte) ((in[3] * l1 + in[7] * l2) >> 16); 
		} 
		else // last pixel of the line has no pixel to lerp to 
		{ 
			*out++ = in[0]; 
			*out++ = in[1]; 
			*out++ = in[2]; 
			*out++ = in[3]; 
		} 
	} 
}

/*
================
GL_ResampleTexture
================
*/

void GL_ResampleTexture (void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight) 
{ 
	int i, j, yi, oldy, f, fstep, l1, l2, endy = (inheight-1);
	
	byte *inrow, *out, *row1, *row2; 
	out = outdata; 
	fstep = (int) (inheight*65536.0f/outheight); 

	row1 = malloc(outwidth*4); 
	row2 = malloc(outwidth*4); 
	inrow = indata; 
	oldy = 0; 
	GL_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth); 
	GL_ResampleTextureLerpLine (inrow + inwidth*4, row2, inwidth, outwidth); 
	for (i = 0, f = 0;i < outheight;i++,f += fstep) 
	{ 
		yi = f >> 16; 
		if (yi != oldy) 
		{ 
			inrow = (byte *)indata + inwidth*4*yi; 
			if (yi == oldy+1) 
				memcpy(row1, row2, outwidth*4); 
			else 
				GL_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth);

			if (yi < endy) 
				GL_ResampleTextureLerpLine (inrow + inwidth*4, row2, inwidth, outwidth); 
			else 
				memcpy(row2, row1, outwidth*4); 
			oldy = yi; 
		} 
		if (yi < endy) 
		{ 
			l2 = f & 0xFFFF; 
			l1 = 0x10000 - l2; 
			for (j = 0;j < outwidth;j++) 
			{ 
				*out++ = (byte) ((*row1++ * l1 + *row2++ * l2) >> 16); 
				*out++ = (byte) ((*row1++ * l1 + *row2++ * l2) >> 16); 
				*out++ = (byte) ((*row1++ * l1 + *row2++ * l2) >> 16); 
				*out++ = (byte) ((*row1++ * l1 + *row2++ * l2) >> 16); 
			} 
			row1 -= outwidth*4; 
			row2 -= outwidth*4; 
		} 
		else // last line has no pixels to lerp to 
		{ 
			for (j = 0;j < outwidth;j++) 
			{ 
				*out++ = *row1++; 
				*out++ = *row1++; 
				*out++ = *row1++; 
				*out++ = *row1++; 
			} 
			row1 -= outwidth*4; 
		} 
	} 
	free(row1); 
	free(row2); 
} 
/*
void GL_ResampleTexture (unsigned *in, int inwidth, int inheight, unsigned *out,  int outwidth, int outheight)
{
	int		i, j;
	unsigned	*inrow, *inrow2;
	unsigned	frac, fracstep;
	unsigned	p1[1024], p2[1024];
	byte		*pix1, *pix2, *pix3, *pix4;

	fracstep = inwidth*0x10000/outwidth;

	frac = fracstep>>2;
	for (i=0 ; i<outwidth ; i++)
	{
		p1[i] = 4*(frac>>16);
		frac += fracstep;
	}
	frac = 3*(fracstep>>2);
	for (i=0 ; i<outwidth ; i++)
	{
		p2[i] = 4*(frac>>16);
		frac += fracstep;
	}

	for (i=0 ; i<outheight ; i++, out += outwidth)
	{
		inrow = in + inwidth*(int)((i+0.25)*inheight/outheight);
		inrow2 = in + inwidth*(int)((i+0.75)*inheight/outheight);
		frac = fracstep >> 1;
		for (j=0 ; j<outwidth ; j++)
		{
			pix1 = (byte *)inrow + p1[j];
			pix2 = (byte *)inrow + p2[j];
			pix3 = (byte *)inrow2 + p1[j];
			pix4 = (byte *)inrow2 + p2[j];
			((byte *)(out+j))[0] = (pix1[0] + pix2[0] + pix3[0] + pix4[0])>>2;
			((byte *)(out+j))[1] = (pix1[1] + pix2[1] + pix3[1] + pix4[1])>>2;
			((byte *)(out+j))[2] = (pix1[2] + pix2[2] + pix3[2] + pix4[2])>>2;
			((byte *)(out+j))[3] = (pix1[3] + pix2[3] + pix3[3] + pix4[3])>>2;
		}
	}
}*/

/*
================
GL_LightScaleTexture

Scale up the pixel values in a texture to increase the
lighting range
================
*/
void GL_LightScaleTexture (unsigned *in, int inwidth, int inheight, qboolean only_gamma )
{
	if ( only_gamma )
	{
		int		i, c;
		byte	*p;

		p = (byte *)in;

		c = inwidth*inheight;
		for (i=0 ; i<c ; i++, p+=4)
		{
			p[0] = gammatable[p[0]];
			p[1] = gammatable[p[1]];
			p[2] = gammatable[p[2]];
		}
	}
	else
	{
		int		i, c;
		byte	*p;

		p = (byte *)in;

		c = inwidth*inheight;
		for (i=0 ; i<c ; i++, p+=4)
		{
			p[0] = gammatable[intensitytable[p[0]]];
			p[1] = gammatable[intensitytable[p[1]]];
			p[2] = gammatable[intensitytable[p[2]]];
		}
	}
}

/*
================
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<height ; i++, in+=width)
	{
		for (j=0 ; j<width ; j+=8, out+=4, in+=8)
		{
			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_Upload32

Returns has_alpha
===============
*/
void GL_BuildPalettedTexture( unsigned char *paletted_texture, unsigned char *scaled, int scaled_width, int scaled_height )
{
	int i;

	for ( i = 0; i < scaled_width * scaled_height; i++ )
	{
		unsigned int r, g, b, c;

		r = ( scaled[0] >> 3 ) & 31;
		g = ( scaled[1] >> 2 ) & 63;
		b = ( scaled[2] >> 3 ) & 31;

		c = r | ( g << 5 ) | ( b << 11 );

		paletted_texture[i] = gl_state.d_16to8table[c];

		scaled += 4;
	}
}


/*
===============
here starts modified code
by Heffo/changes by Nexus
===============
*/

static	int		upload_width, upload_height; //** DMP made local to module
static	qboolean uploaded_paletted;			//** DMP ditto

int nearest_power_of_2 (int size)
{
	int i = 2;

	// NeVo - infinite loop bug-fix
	if (size == 1)
		return size; 

	while (1) 
	{
		i <<= 1;
		if (size == i)
			return i;
		if (size > i && size < (i <<1)) 
		{
			if (size >= ((i+(i<<1))/2))
				return i<<1;
			else
				return i;
		}
	};
}

qboolean GL_Upload32 (unsigned *data, int width, int height, qboolean mipmap)
{
	int			samples;
	unsigned 	*scaled;
	int			scaled_width, scaled_height;
	int			i, c;
	byte		*scan;
	int comp;

	uploaded_paletted = false;

	// scan the texture for any non-255 alpha
	c = width*height;
	scan = ((byte *)data) + 3;
	samples = gl_solid_format;
	for (i=0 ; i<c ; i++, scan += 4)
	{
		if ( *scan != 255 )
		{
			samples = gl_alpha_format;
			break;
		}
	}

	//Heffo - ARB Texture Compression
	qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_NICEST);
	if (samples == gl_solid_format)
		comp = (gl_state.texture_compression) ? GL_COMPRESSED_RGB_ARB : gl_tex_solid_format;
	else if (samples == gl_alpha_format)
		comp = (gl_state.texture_compression) ? GL_COMPRESSED_RGBA_ARB : gl_tex_alpha_format;

	// find sizes to scale to
	{
		scaled_width = nearest_power_of_2(width);
		scaled_height = nearest_power_of_2(height);

		if (scaled_width > gl_config.max_texsize)
			scaled_width = gl_config.max_texsize;
		if (scaled_height > gl_config.max_texsize)
			scaled_height = gl_config.max_texsize;
	}

	// let people sample down the world textures for speed
	if (mipmap && (int)gl_picmip->value > 0)
	{
		int maxsize;

		if ((int)gl_picmip->value == 1) // clamp to 512x512
			maxsize = 512;
		else if ((int)gl_picmip->value == 2) // clamp to 256x256
			maxsize = 256;
		else // clamp to 128x128
			maxsize = 128;

		while (1) {
			if (scaled_width <= maxsize && scaled_height <= maxsize)
				break;
			scaled_width >>= 1;
			scaled_height >>= 1;
		}
		//scaled_width >>= (int)gl_picmip->value;
		//scaled_height >>= (int)gl_picmip->value;
	}

	//if (scaled_width * scaled_height > sizeof(scaled)/4)
	//	Sys_Error ("GL_LoadTexture: too big");

	//upload_width = scaled_width;
	//upload_height = scaled_height;

	// scan the texture for any non-255 alpha
	/*c = width*height;
	scan = ((byte *)data) + 3;
	samples = gl_solid_format;
	for (i=0 ; i<c ; i++, scan += 4)
	{
		if ( *scan != 255 )
		{
			samples = gl_alpha_format;
			break;
		}
	}

	if (samples == gl_solid_format)
	    comp = gl_tex_solid_format;
	else if (samples == gl_alpha_format)
	    comp = gl_tex_alpha_format;
	else
	{
	    VID_Printf (PRINT_ALL,
			   "Unknown number of texture components %i\n",
			   samples);
	    comp = samples;
	}

	//Heffo - ARB Texture Compression
	if (samples == gl_solid_format)
		comp = (gl_state.texture_compression) ? GL_COMPRESSED_RGB_ARB : gl_tex_solid_format;
	else if (samples == gl_alpha_format)
		comp = (gl_state.texture_compression) ? GL_COMPRESSED_RGBA_ARB : gl_tex_alpha_format;
	else
	{
	    VID_Printf (PRINT_ALL, "Unknown number of texture components %i\n", samples);
	    comp = samples;
	}

	if (scaled_width == width && scaled_height == height)
	{
		if (!mipmap)
		{
			qglTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
			qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
			qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
			goto done;
		}
		memcpy (scaled, data, width*height*4);
	}
	else
		GL_ResampleTexture (data, width, height, scaled, scaled_width, scaled_height);
	GL_LightScaleTexture (scaled, scaled_width, scaled_height, !mipmap );
	qglTexImage2D( GL_TEXTURE_2D, 0, comp, 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++;
			qglTexImage2D (GL_TEXTURE_2D, miplevel, comp, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
		}
	}
done:
*/
	if (scaled_width != width || scaled_height != height) 
	{
		scaled=malloc((scaled_width * scaled_height) * 4);
		GL_ResampleTexture(data,width,height,scaled,scaled_width,scaled_height);
	}
	else
	{
		scaled_width=width;
		scaled_height=height;
		scaled=data;
	}
	
	if (!gl_state.gammaramp)
		GL_LightScaleTexture (scaled, scaled_width, scaled_height, !mipmap );

	if (mipmap)
	{
		if (gl_state.sgis_mipmap)
		{
			qglTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, true);
			qglTexImage2D (GL_TEXTURE_2D, 0, comp, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
		} 
		else
			gluBuild2DMipmaps (GL_TEXTURE_2D, comp, scaled_width, scaled_height, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
	} 
	else
		qglTexImage2D (GL_TEXTURE_2D, 0, comp, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);

	if (scaled_width != width || scaled_height != height)
		free(scaled);

	upload_width=scaled_width; upload_height = scaled_height;

	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, (mipmap) ? gl_filter_min : gl_filter_max);
	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);

	if (mipmap)
	{	// Set anisotropic filter if supported and enabled
		if (gl_config.anisotropic && gl_anisotropic->value)
			qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, gl_anisotropic->value);
	}

	return (samples == gl_alpha_format || samples == GL_COMPRESSED_RGBA_ARB);
}

/*
===============
GL_Upload8

Returns has_alpha
===============
*/
/*
static qboolean IsPowerOf2( int value )
{
	int i = 1;


	while ( 1 )
	{
		if ( value == i )
			return true;
		if ( i > value )
			return false;
		i <<= 1;
	}
}
*/

qboolean GL_Upload8 (byte *data, int width, int height,  qboolean mipmap, qboolean is_sky )
{
	unsigned	trans[512*256];
	int			i, s;
	int			p;

	s = width*height;

	if (s > sizeof(trans)/4)
		VID_Error (ERR_DROP, "GL_Upload8: too large");

	/*if ( qglColorTableEXT && 
		 gl_ext_palettedtexture->value && 
		 is_sky )
	{
		qglTexImage2D( GL_TEXTURE_2D,
					  0,
					  GL_COLOR_INDEX8_EXT,
					  width,
					  height,
					  0,
					  GL_COLOR_INDEX,
					  GL_UNSIGNED_BYTE,
					  data );

		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);
		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
	}
	else*/
	{
		for (i=0 ; i<s ; i++)
		{
			p = data[i];
			trans[i] = d_8to24table[p];

			if (p == 255)
			{	// transparent, so scan around for another color
				// to avoid alpha fringes
				// FIXME: do a full flood fill so mips work...
				if (i > width && data[i-width] != 255)
					p = data[i-width];
				else if (i < s-width && data[i+width] != 255)
					p = data[i+width];
				else if (i > 0 && data[i-1] != 255)
					p = data[i-1];
				else if (i < s-1 && data[i+1] != 255)
					p = data[i+1];
				else
					p = 0;
				// copy rgb components
				((byte *)&trans[i])[0] = ((byte *)&d_8to24table[p])[0];
				((byte *)&trans[i])[1] = ((byte *)&d_8to24table[p])[1];
				((byte *)&trans[i])[2] = ((byte *)&d_8to24table[p])[2];
			}
		}

		return GL_Upload32 (trans, width, height, mipmap);
	}
}


/*
================
GL_LoadPic

This is also used as an entry point for the generated r_notexture
Nexus  - changes for hires-textures
================
*/
image_t *GL_LoadPic (char *name, byte *pic, int width, int height, imagetype_t type, int bits)
{
	image_t		*image;
	int			i;
	//Nexus'added vars
	int len; 
	char s[128]; 

	// find a free image_t
	for (i=0, image=gltextures ; i<numgltextures ; i++,image++)
	{
		if (!image->texnum)
			break;
	}
	if (i == numgltextures)
	{
		if (numgltextures == MAX_GLTEXTURES)
			VID_Error (ERR_DROP, "MAX_GLTEXTURES");
		numgltextures++;
	}
	image = &gltextures[i];

	if (strlen(name) >= sizeof(image->name))
		VID_Error (ERR_DROP, "Draw_LoadPic: \"%s\" is too long", name);
	strcpy (image->name, name);
	image->registration_sequence = registration_sequence;

	image->width = width;
	image->height = height;
	image->type = type;
	image->replace_scale_w = image->replace_scale_h = 1.0f; // Knightmare added

	if (type == it_skin && bits == 8)
		R_FloodFillSkin(pic, width, height);

// Knightmare- replacement scaling hack for TGA/JPEG HUD images and skins
// NOTE: replace this with shaders as soon as they are supported
	len = strlen(name); 
	strcpy(s,name);
	// check if we have a .tga/jpg pic
#if defined (__unix__)
	if ((type == it_pic /*| type == it_skin*/) && 
	(!strcmp(s+len-4, ".png") || !strcmp(s+len-4, ".tga") || !strcmp(s+len-4, ".jpg")) )
#else
	if ((type == it_pic /*| type == it_skin*/)&& (!strcmp(s+len-4, ".tga") || !strcmp(s+len-4, ".jpg")) )
#endif
	{ 
		byte	*pic, *palette;
		int		pcxwidth, pcxheight;
		s[len-3]='p'; s[len-2]='c'; s[len-1]='x'; // replace extension 
		LoadPCX (s, &pic, &palette, &pcxwidth, &pcxheight); // load .pcx file 
		
		if (pcxwidth > 0 && pcxheight > 0) {
			//if (type == it_pic) {
				image->replace_scale_w = (float)pcxwidth/image->width;
				image->replace_scale_h = (float)pcxheight/image->height;
				//image->replace_scale = ((float)pcxwidth/image->width + (float)pcxheight/image->height)*0.5;
				//if (image->replace_scale == 0.0f) image->replace_scale = 1.0f;
				//image->replace_scale = max(image->replace_scale, 0.0f);
				//image->replace_scale = min(image->replace_scale, 1.0f);
			/*}
			else if (type == it_skin) {
				image->replace_scale_w = (float)image->width/(float)pcxwidth;
				image->replace_scale_h = (float)image->height/(float)pcxheight;
				VID_Printf(PRINT_ALL, "Skin: %s replace scale: %f x %f y\n", image->name, image->replace_scale_w ,image->replace_scale_h);
			}*/
		}
		if (pic) free(pic);
		if (palette) free(palette);
	}	
// end Knightmare

	// load little pics into the scrap
	if (image->type == it_pic && bits == 8
		&& image->width < 64 && image->height < 64)
	{
		int		x, y;
		int		i, j, k;
		int		texnum;

		texnum = Scrap_AllocBlock (image->width, image->height, &x, &y);
		if (texnum == -1)
			goto nonscrap;
		scrap_dirty = true;

		// copy the texels into the scrap block
		k = 0;
		for (i=0 ; i<image->height ; i++)
			for (j=0 ; j<image->width ; j++, k++)
				scrap_texels[texnum][(y+i)*BLOCK_WIDTH + x + j] = pic[k];
		image->texnum = TEXNUM_SCRAPS + texnum;
		image->scrap = true;
		image->has_alpha = true;
		image->sl = (x+0.01)/(float)BLOCK_WIDTH;
		image->sh = (x+image->width-0.01)/(float)BLOCK_WIDTH;
		image->tl = (y+0.01)/(float)BLOCK_WIDTH;
		image->th = (y+image->height-0.01)/(float)BLOCK_WIDTH;
	}
	else
	{
nonscrap:
		image->scrap = false;
		image->texnum = TEXNUM_IMAGES + (image - gltextures);
		GL_Bind(image->texnum);
		if (bits == 8)
			image->has_alpha = GL_Upload8 (pic, width, height, (image->type != it_pic && image->type != it_sky), image->type == it_sky );
		else
			image->has_alpha = GL_Upload32 ((unsigned *)pic, width, height, (image->type != it_pic && image->type != it_sky) );
		image->upload_width = upload_width;		// after power of 2 and scales
		image->upload_height = upload_height;
		image->paletted = uploaded_paletted;
		image->sl = 0;
		image->sh = 1;
		image->tl = 0;
		image->th = 1;
	}

	return image;
}


/*
================
GL_LoadWal
================
*/
image_t *GL_LoadWal (char *name)
{
	miptex_t	*mt;
	int			width, height, ofs;
	image_t		*image;

	FS_LoadFile (name, (void **)&mt);
	if (!mt)
	{
		VID_Printf (PRINT_ALL, "GL_FindImage: can't load %s\n", name);
		return r_notexture;
	}

	width = LittleLong (mt->width);
	height = LittleLong (mt->height);
	ofs = LittleLong (mt->offsets[0]);

	image = GL_LoadPic (name, (byte *)mt + ofs, width, height, it_wall, 8);

	FS_FreeFile ((void *)mt);

	return image;
}

/*
===============
GL_FindImage

Finds or loads the given image
===============
*/
image_t	*GL_FindImage (char *name, imagetype_t type)
{
	image_t	*image;
	int		i, len;
	byte	*pic, *palette;
	int		width, height;

	if (!name)
		return NULL;
	len = strlen(name);
	if (len<5)
		return NULL;

	// look for it
	for (i=0, image=gltextures ; i<numgltextures ; i++,image++)
	{
		if (!strcmp(name, image->name))
		{
			image->registration_sequence = registration_sequence;
			return image;
		}
	}

	//
	// load the pic from disk
	//
	pic = NULL;
	palette = NULL;

	//Knightmare- MrG's automatic JPG & TGA loading
	// search for TGAs or JPGs to replace .pcx and .wal images
	if (!strcmp(name+len-4, ".pcx") || !strcmp(name+len-4, ".wal"))
	{
		char s[128];
		strcpy(s,name);
		
#if defined (__unix__)		
		s[len-3]='p'; s[len-2]='n'; s[len-1]='g';
		image = GL_FindImage(s,type);
		if (image)
			return image;
#endif
		
		s[len-3]='t'; s[len-2]='g'; s[len-1]='a';
		image = GL_FindImage(s,type);
		if (image)
			return image;

		//Knightmare- if no TGA, check for JPG
		s[len-3]='j'; s[len-2]='p'; s[len-1]='g';
		image = GL_FindImage(s,type);
		if (image)
			return image;
	}
	//end Knightmare
	if (!strcmp(name+len-4, ".pcx"))
	{
		LoadPCX (name, &pic, &palette, &width, &height);
		if (!pic)
			return NULL;
		image = GL_LoadPic (name, pic, width, height, type, 8);
	}
	else if (!strcmp(name+len-4, ".wal"))
	{
		image = GL_LoadWal (name);
	}
#if defined (__unix__)
	else if (!strcmp(name+len-4, ".png")) 
	{
		LoadPNG(name, &pic, &width, &height);
		if(!pic)
			return NULL;
		image = GL_LoadPic(name, pic, width, height, type, 32);
	}
#endif
	else if (!strcmp(name+len-4, ".tga"))
	{
		LoadTGA (name, &pic, &width, &height);
		if (!pic) { //hack for md3s- they usually have tga skin references, check for jpg
			char s[128];
			strcpy(s,name);
			s[len-3]='j'; s[len-2]='p'; s[len-1]='g';
			image = GL_FindImage(s,type);
			if (image)
				return image;
			else
				return NULL;
		}
		image = GL_LoadPic (name, pic, width, height, type, 32);
	}
	else if (!strcmp(name+len-4, ".jpg")) // Heffo - JPEG support
	{
		LoadJPG(name, &pic, &width, &height);
		if(!pic)
			return NULL;
		image = GL_LoadPic(name, pic, width, height, type, 32);
	}
	/*else if (!strcmp(name+len-4, ".cin")) // Heffo
	{										// WHY .cin files? because we can!
		cinematics_t *newcin;

		newcin = CIN_OpenCin(name);
		if(!newcin)
			return NULL;

		pic = malloc(256*256*4);
		memset(pic, 192, (256*256*4));

		image = GL_LoadPic (name, pic, 256, 256, type, 32);

		newcin->texnum = image->texnum;
		image->is_cin = true;
	}*/
	else
		return NULL;


	if (pic)
		free(pic);
	if (palette)
		free(palette);

	return image;
}



/*
===============
R_RegisterSkin
===============
*/
struct image_s *R_RegisterSkin (char *name)
{
	return GL_FindImage (name, it_skin);
}


/*
================
GL_FreeUnusedImages

Any image that was not touched on this registration sequence
will be freed.
================
*/
void GL_FreeUnusedImages (void)
{
	int		i;
	image_t	*image;

	// never free r_notexture or particle texture
	r_notexture->registration_sequence = registration_sequence;
#ifdef	ROQ_SUPPORT
	r_rawtexture->registration_sequence = registration_sequence;
#endif // ROQ_SUPPORT

	r_envmappic->registration_sequence = registration_sequence;
	r_spheremappic->registration_sequence = registration_sequence;
	r_shelltexture->registration_sequence = registration_sequence;
	r_particlebeam->registration_sequence = registration_sequence;

	for (i=0; i<PARTICLE_TYPES; i++)
		if (r_particletextures[i]) //dont mess with null ones silly :p
			r_particletextures[i]->registration_sequence = registration_sequence;

	for (i=0, image=gltextures ; i<numgltextures ; i++, image++)
	{
		if (image->registration_sequence == registration_sequence)
			continue;		// used this sequence
		if (!image->registration_sequence)
			continue;		// free image_t slot
		if (image->type == it_pic)
			continue;		// don't free pics

		//Heffo - Free Cinematic
		//if(image->is_cin)
		//	CIN_FreeCin(image->texnum);

		// free it
		qglDeleteTextures (1, (GLuint *)&image->texnum);
		memset (image, 0, sizeof(*image));
	}
}


/*
===============
Draw_GetPalette
===============
*/
int Draw_GetPalette (void)
{
	int		i;
	int		r, g, b;
	unsigned	v;
	byte	*pic, *pal;
	int		width, height;
	//int		avg, dr, dg, db, d1, d2, d3;	//** DMP
	//float	sat;							//** DMP

	// get the palette

	LoadPCX ("pics/colormap.pcx", &pic, &pal, &width, &height);
	if (!pal)
		VID_Error (ERR_FATAL, "Couldn't load pics/colormap.pcx");

	for (i=0 ; i<256 ; i++)
	{
		r = pal[i*3+0];
		g = pal[i*3+1];
		b = pal[i*3+2];
		
		//** DMP adjust saturation
		/*avg = (r + g + b + 2) / 3;			// first calc grey value we'll desaturate to
		dr = avg - r;						// calc distance from grey value to each gun
		dg = avg - g;
		db = avg - b;
		d1 = abs(r - g);					// find greatest distance between all the guns
		d2 = abs(g - b);
		d3 = abs(b - r);
		if (d1 > d2)						// we will use this for our existing saturation
			if (d1 > d3)
				sat = d1;
			else
				if (d2 > d3)
					sat = d2;
				else
					sat = d3;
		else
			if (d2 > d3)
				sat = d2;
			else
				sat = d3;
		sat /= 255.0;						// convert existing saturationn to ratio
		sat = 1.0 - sat;					// invert so the most saturation causes the desaturation to lessen
		sat *= (1.0 - gl_saturation->value); // scale the desaturation value so our desaturation is non-linear (keeps lava looking good)
		dr *= sat;							// scale the differences by the amount we want to desaturate
		dg *= sat;
		db *= sat;
		r += dr;							// now move the gun values towards total grey by the amount we desaturated
		g += dg;
		b += db;*/
		//** DMP end saturation mod

		v = (255<<24) + (r<<0) + (g<<8) + (b<<16);
		d_8to24table[i] = LittleLong(v);
	}

	d_8to24table[255] &= LittleLong(0xffffff);	// 255 is transparent

	free (pic);
	free (pal);

	return 0;
}


/*
===============
GL_InitImages
===============
*/
void	GL_InitImages (void)
{
	int		i, j;
	float	g = vid_gamma->value;

	registration_sequence = 1;

	// init intensity conversions
	//intensity = Cvar_Get ("intensity", "2", CVAR_ARCHIVE);

	// Knightmare- added Vic's overbright rendering
	if (gl_config.mtexcombine)
		intensity = Cvar_Get ("intensity", "1", 0);
	else
		intensity = Cvar_Get ("intensity", "2", 0);
	// end Knightmare

	if ( intensity->value <= 1 )
		Cvar_Set( "intensity", "1" );

	gl_state.inverse_intensity = 1 / intensity->value;

	Draw_GetPalette ();

	if ( qglColorTableEXT )
	{
		FS_LoadFile( "pics/16to8.dat", (void *)&gl_state.d_16to8table );
		if ( !gl_state.d_16to8table )
			VID_Error( ERR_FATAL, "Couldn't load pics/16to8.pcx");
	}

	if ( gl_config.renderer & ( GL_RENDERER_VOODOO | GL_RENDERER_VOODOO2 ) )
	{
		g = 1.0F;
	}

	for ( i = 0; i < 256; i++ )
	{
		if ( g == 1 )
		{
			gammatable[i] = i;
		}
		else
		{
			float inf;

			inf = 255 * pow ( (i+0.5)/255.5 , g ) + 0.5;
			if (inf < 0)
				inf = 0;
			if (inf > 255)
				inf = 255;
			gammatable[i] = inf;
		}
	}

	for (i=0 ; i<256 ; i++)
	{
		j = i*intensity->value;
		if (j > 255)
			j = 255;
		intensitytable[i] = j;
	}

#ifdef LIGHT_BLOOMS
	R_InitBloomTextures(); // BLOOMS
#endif
}

/*
===============
R_FreePic
by Knightmare
Frees a single pic
===============
*/
void R_FreePic (char *name)
{
	int		i;
	image_t	*image;

	for (i=0, image=gltextures; i<numgltextures; i++, image++)
	{
		if (!image->registration_sequence)
			continue;		// free image_t slot
		if (image->type != it_pic)
			continue;		// only free pics
		if (!strcmp(name, image->name))
		{
			//Heffo - Free Cinematic
			//if (image->is_cin)
			//	CIN_FreeCin(image->texnum);

			// free it
			qglDeleteTextures (1, (GLuint *)&image->texnum);
			memset (image, 0, sizeof(*image));
			return; //we're done here
		}
	}
}

/*
===============
GL_ShutdownImages
===============
*/
void GL_ShutdownImages (void)
{
	int		i;
	image_t	*image;

	for (i=0, image=gltextures; i<numgltextures; i++, image++)
	{
		if (!image->registration_sequence)
			continue;		// free image_t slot

		//Heffo - Free Cinematic
		//if (image->is_cin)
		//	CIN_FreeCin(image->texnum);

		// free it
		qglDeleteTextures (1, (GLuint *)&image->texnum);
		memset (image, 0, sizeof(*image));
	}
}

