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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.

*/

// disable data conversion warnings

#pragma warning(disable : 4244)     // MIPS

#pragma warning(disable : 4136)     // X86

#pragma warning(disable : 4051)     // ALPHA

#ifdef _WIN32

#include 

#endif

#include 

#include 

void GL_BeginRendering (int *x, int *y, int *width, int *height);

void GL_EndRendering (void);

#ifdef _WIN32

// Function prototypes for the Texture Object Extension routines

typedef GLboolean (APIENTRY *ARETEXRESFUNCPTR)(GLsizei, const GLuint *,

                    const GLboolean *);

typedef void (APIENTRY *BINDTEXFUNCPTR)(GLenum, GLuint);

typedef void (APIENTRY *DELTEXFUNCPTR)(GLsizei, const GLuint *);

typedef void (APIENTRY *GENTEXFUNCPTR)(GLsizei, GLuint *);

typedef GLboolean (APIENTRY *ISTEXFUNCPTR)(GLuint);

typedef void (APIENTRY *PRIORTEXFUNCPTR)(GLsizei, const GLuint *,

                    const GLclampf *);

typedef void (APIENTRY *TEXSUBIMAGEPTR)(int, int, int, int, int, int, int, int, void *);

extern	BINDTEXFUNCPTR bindTexFunc;

extern	DELTEXFUNCPTR delTexFunc;

extern	TEXSUBIMAGEPTR TexSubImage2DFunc;

#endif

extern	int texture_extension_number;

extern	int		texture_mode;

extern	float	gldepthmin, gldepthmax;

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

void GL_Upload8 (byte *data, int width, int height,  qboolean mipmap, qboolean alpha);

int GL_LoadTexture (char *identifier, int width, int height, byte *data, qboolean mipmap, qboolean alpha);

int GL_FindTexture (char *identifier);

typedef struct

{

	float	x, y, z;

	float	s, t;

	float	r, g, b;

} glvert_t;

extern glvert_t glv;

extern	int glx, gly, glwidth, glheight;

#ifdef _WIN32

extern	PROC glArrayElementEXT;

extern	PROC glColorPointerEXT;

extern	PROC glTexturePointerEXT;

extern	PROC glVertexPointerEXT;

#endif

// r_local.h -- private refresh defs

#define ALIAS_BASE_SIZE_RATIO		(1.0 / 11.0)

					// normalizing factor so player model works out to about

					//  1 pixel per triangle

#define	MAX_LBM_HEIGHT		480

#define TILE_SIZE		128		// size of textures generated by R_GenTiledSurf

#define SKYSHIFT		7

#define	SKYSIZE			(1 << SKYSHIFT)

#define SKYMASK			(SKYSIZE - 1)

#define BACKFACE_EPSILON	0.01

void R_TimeRefresh_f (void);

void R_ReadPointFile_f (void);

texture_t *R_TextureAnimation (texture_t *base);

typedef struct surfcache_s

{

	struct surfcache_s	*next;

	struct surfcache_s 	**owner;		// NULL is an empty chunk of memory

	int					lightadj[MAXLIGHTMAPS]; // checked for strobe flush

	int					dlight;

	int					size;		// including header

	unsigned			width;

	unsigned			height;		// DEBUG only needed for debug

	float				mipscale;

	struct texture_s	*texture;	// checked for animating textures

	byte				data[4];	// width*height elements

} surfcache_t;

typedef struct

{

	pixel_t		*surfdat;	// destination for generated surface

	int			rowbytes;	// destination logical width in bytes

	msurface_t	*surf;		// description for surface to generate

	fixed8_t	lightadj[MAXLIGHTMAPS];

							// adjust for lightmap levels for dynamic lighting

	texture_t	*texture;	// corrected for animating textures

	int			surfmip;	// mipmapped ratio of surface texels / world pixels

	int			surfwidth;	// in mipmapped texels

	int			surfheight;	// in mipmapped texels

} drawsurf_t;

typedef enum {

	pt_static, pt_grav, pt_slowgrav, pt_fire, pt_explode, pt_explode2, pt_blob, pt_blob2

} ptype_t;

// !!! if this is changed, it must be changed in d_ifacea.h too !!!

typedef struct particle_s

{

// driver-usable fields

	vec3_t		org;

	float		color;

// drivers never touch the following fields

	struct particle_s	*next;

	vec3_t		vel;

	float		ramp;

	float		die;

	ptype_t		type;

} particle_t;

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

extern	entity_t	r_worldentity;

extern	qboolean	r_cache_thrash;		// compatability

extern	vec3_t		modelorg, r_entorigin;

extern	entity_t	*currententity;

extern	int			r_visframecount;	// ??? what difs?

extern	int			r_framecount;

extern	mplane_t	frustum[4];

extern	int		c_brush_polys, c_alias_polys;

//

// view origin

//

extern	vec3_t	vup;

extern	vec3_t	vpn;

extern	vec3_t	vright;

extern	vec3_t	r_origin;

//

// screen size info

//

extern	refdef_t	r_refdef;

extern	mleaf_t		*r_viewleaf, *r_oldviewleaf;

extern	texture_t	*r_notexture_mip;

extern	int		d_lightstylevalue[256];	// 8.8 fraction of base light value

extern	qboolean	envmap;

extern	int	currenttexture;

extern	int	cnttextures[2];

extern	int	particletexture;

extern	int	playertextures;

extern	int	skytexturenum;		// index in cl.loadmodel, not gl texture object

extern	cvar_t	r_norefresh;

extern	cvar_t	r_drawentities;

extern	cvar_t	r_drawworld;

extern	cvar_t	r_drawviewmodel;

extern	cvar_t	r_speeds;

extern	cvar_t	r_waterwarp;

extern	cvar_t	r_fullbright;

extern	cvar_t	r_lightmap;

extern	cvar_t	r_shadows;

extern	cvar_t	r_mirroralpha;

extern	cvar_t	r_wateralpha;

extern	cvar_t	r_dynamic;

extern	cvar_t	r_novis;

extern	cvar_t	gl_clear;

extern	cvar_t	gl_cull;

extern	cvar_t	gl_poly;

extern	cvar_t	gl_texsort;

extern	cvar_t	gl_smoothmodels;

extern	cvar_t	gl_affinemodels;

extern	cvar_t	gl_polyblend;

extern	cvar_t	gl_keeptjunctions;

extern	cvar_t	gl_reporttjunctions;

extern	cvar_t	gl_flashblend;

extern	cvar_t	gl_nocolors;

extern	cvar_t	gl_doubleeyes;

extern	int		gl_lightmap_format;

extern	int		gl_solid_format;

extern	int		gl_alpha_format;

extern	cvar_t	gl_max_size;

extern	cvar_t	gl_playermip;

extern	int			mirrortexturenum;	// quake texturenum, not gltexturenum

extern	qboolean	mirror;

extern	mplane_t	*mirror_plane;

extern	float	r_world_matrix[16];

extern	const char *gl_vendor;

extern	const char *gl_renderer;

extern	const char *gl_version;

extern	const char *gl_extensions;

void R_TranslatePlayerSkin (int playernum);

void GL_Bind (int texnum);

// Multitexture

#define    TEXTURE0_SGIS				0x835E

#define    TEXTURE1_SGIS				0x835F

#ifndef _WIN32

#define APIENTRY /* */

#endif

typedef void (APIENTRY *lpMTexFUNC) (GLenum, GLfloat, GLfloat);

typedef void (APIENTRY *lpSelTexFUNC) (GLenum);

extern lpMTexFUNC qglMTexCoord2fSGIS;

extern lpSelTexFUNC qglSelectTextureSGIS;

extern qboolean gl_mtexable;

void GL_DisableMultitexture(void);

void GL_EnableMultitexture(void);