/*
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 <windows.h>
#endif

#include <GL/gl.h>
#include <GL/glu.h>

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 (void *data, int width, int height,  qboolean mipmap, qboolean alpha); //qbism//00-10-15
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);
//qbism//00-10-15 32T and MD2
int GL_LoadTexture (char *identifier, int width, int height, byte *data, qboolean mipmap, qboolean alpha, int bytesperpixel);
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 !!!
//qbism//2000-03-15 modified particle_s by Topaz. //jf incompat. w/ standard server
/*
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;
   byte        style;
   float       roll;
} particle_t;
*/

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   smoketexture; //qbism//2000-03-16 for Topaz particle

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_smoketrailwidth; //qbism//jf 00-07-02
extern	cvar_t	r_skybox;
extern	cvar_t	r_dynamic;
extern	cvar_t	r_novis;

//qbism// 2000-01-16 r_waterripple from QuakeForge
extern  cvar_t  r_waterripple;

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_flashblend;
//extern	cvar_t	gl_nocolors;
//extern	cvar_t	gl_doubleeyes;

//qbism//jf 01-10-30 mrg
extern	cvar_t	gl_showcuts;
extern	cvar_t	freelook;

extern	cvar_t  gl_torchflares; //qbism//00-04-10 by KH

extern	int		gl_lightmap_format;
extern	int		gl_solid_format;
extern	int		gl_alpha_format;

//qbism//00-07-02 NATAS - BramBo - fog code
    extern cvar_t fog_enable;
    extern cvar_t fog_start;
    extern cvar_t fog_end;
    extern cvar_t fog_density;
    extern cvar_t fog_alpha;
    extern cvar_t fog_red;
    extern cvar_t fog_blue;
    extern cvar_t fog_green;
    // END

    extern cvar_t gl_fisheye; //qbism//jf GLMV 00-07-12
    extern cvar_t gl_fep1; //qbism//jf GLMV 00-07-12
    extern cvar_t gl_fep2; //qbism//jf GLMV 00-07-12
    extern cvar_t gl_fep3; //qbism//jf GLMV 00-07-12

extern	cvar_t	gl_max_size;
// extern	cvar_t	gl_playermip;

//qbism// 2000-02-03 fenix@io.com: model interpolation
extern  cvar_t  r_lerpanimate;
extern  cvar_t  r_lerptransform;

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;

//jft void R_TranslatePlayerSkin (int playernum);
//void GL_Bind (int texnum); //qbism//jf 00-09-21 bag it

// 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);

extern	cvar_t	gl_glowmap;	//qbism// 1999-12-28 OpenGL fullbright fix by Neal White III

//qbism//jf 2000-01-14 Added prototypes that were missing.
void GL_Set2D (void);
void EmitSkyPolys (msurface_t *fa);
void EmitWaterPolys (msurface_t *fa);
void R_DrawSkyBox (void);
void R_DrawSkyChain (msurface_t *s);
void EmitBothSkyLayers (msurface_t *fa);
void R_LoadSkys (char *skyname);
void R_ClearSkyBox (void);
void R_InitSky (texture_t *mt);
qboolean R_CullBox (vec3_t mins, vec3_t maxs);
void R_RotateForEntity (entity_t *e);
int GL_LoadPicTexture (qpic_t *pic);
void V_CalcBlend (void);
void LoadTGA (FILE *fin);

//qbism//jf 00-07-06, 00-09-18 more prototypes
void ClipSkyPolygon (int nump, vec3_t vecs, int stage);
void R_ParticleExplosion3 (vec3_t org);
void CRC_ProcessBytes(unsigned short *crcvalue, byte *data, int size);
void Draw_Number (int x, int y, int num, int col_flag);
int fgetLittleShort (FILE *f);
int fgetLittleLong (FILE *f);
dfunction_t *ED_FindFunction (char *name);
void R_BlendedRotateForEntity (entity_t *e);

//qbism//jf 00-05-23 this may come in handy in sbar.c
void Draw_AlphaPic (int x, int y, qpic_t *pic, float alpha);
void Draw_AlphaPic2 (int x, int y, qpic_t *pic, float alpha);
void Draw_Pic2 (int x, int y, qpic_t *pic);

//qbism// Several prototypes moved from r_local.h to here.
void R_StoreEfrags (efrag_t **ppefrag);
void R_MarkLights (dlight_t *light, int bit, mnode_t *node);
void R_DrawParticles (void);
void R_InitParticles (void);
void R_ClearParticles (void);
void R_ReadPointFile_f (void);
void R_SurfacePatch (void);
void GL_BuildLightmaps (void);
//void GL_Upload8_EXT (byte *data, int width, int height,  qboolean mipmap); //qbism//00-10-15
void GL_Upload8_EXT (byte *data, int width, int height,  qboolean mipmap, qboolean alpha);
void GL_SubdivideSurface (msurface_t *fa);
void R_RenderBrushPoly (msurface_t *fa);
int *R_LightPoint (vec3_t p);
void R_DrawBrushModel (entity_t *e);
void R_AnimateLight (void);
void R_DrawWaterSurfaces (void);
void R_DrawWorld (void);
void GL_MakeAliasModelDisplayLists (model_t *m, aliashdr_t *hdr);
void R_RenderDlights (void);
qboolean VID_Is8bit();
