/*
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.

*/
// gl_local.h -- private refresh defs

// disable data conversion warnings

#ifndef  __GLLOCAL_H_
#define	 __GLLOCAL_H_

#pragma warning(disable : 4244)     // MIPS
#pragma warning(disable : 4136)     // X86
#pragma warning(disable : 4051)     // ALPHA
  
#ifdef _WIN32
#include <windows.h>
#endif
// we're using the fake gl wrapper
//#define USEFAKEGL

// FAKEGL - switch include files
#ifndef USEFAKEGL
#include <gl/gl.h>
#include <GL/glu.h>
// switch your OpenGL libs to this so that you can more easily switch between configurations
#pragma comment (lib, "opengl32.lib")
#pragma comment (lib, "glu32.lib")
#else
#include "fakegl.h"
#endif

#include "gl_texture.h"

#ifndef APIENTRY
#define APIENTRY
#endif

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

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;

#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 SKYSHIFT		7
#define	SKYSIZE			(1 << SKYSHIFT)
#define SKYMASK			(SKYSIZE - 1)

#define BACKFACE_EPSILON	0.01

void R_TimeRefresh_f (void);
texture_t *R_TextureAnimation (texture_t *base);

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


void QMB_InitParticles(void);
void QMB_ClearParticles(void);
void QMB_DrawParticles(void);

void QMB_RunParticleEffect (vec3_t org, vec3_t dir, int color, int count);
void QMB_ParticleTrail (vec3_t start, vec3_t end, vec3_t *, trail_type_t type);
void QMB_BlobExplosion (vec3_t org);
void QMB_ParticleExplosion (vec3_t org);
void QMB_LavaSplash (vec3_t org);
void QMB_TeleportSplash (vec3_t org);

void QMB_DetpackExplosion (vec3_t org);

void QMB_InfernoFlame (vec3_t org);
void QMB_StaticBubble (entity_t *ent);

extern qboolean qmb_initialized;


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

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;
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	mleaf_t		*r_viewleaf2, *r_oldviewleaf2;	// for watervis hack
extern	texture_t	*r_notexture_mip;
extern	int			d_lightstylevalue[256];	// 8.8 fraction of base light value

extern	int	particletexture;
extern	int	netgraphtexture;
extern	int	playertextures;
extern	int	playerfbtextures[MAX_CLIENTS];
extern	int	skyboxtextures;
extern	int	skytexturenum;		// index in cl.loadmodel, not gl texture object
extern	int underwatertexture, detailtexture;

extern	cvar_t	r_drawentities;
extern	cvar_t	r_drawworld;
extern	cvar_t	r_drawflame;
extern	cvar_t	r_speeds;
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	r_netgraph;
extern	cvar_t	r_fullbrightSkins;
extern	cvar_t	r_fastsky;
extern	cvar_t	r_skycolor;
extern	cvar_t	r_farclip;

extern	cvar_t	r_skyname;
extern  cvar_t  gl_caustics;		
extern  cvar_t  gl_detail;			

extern	cvar_t	gl_subdivide_size;
extern	cvar_t	gl_clear;
extern	cvar_t	gl_cull;
extern	cvar_t	gl_smoothmodels;
extern	cvar_t	gl_affinemodels;
extern	cvar_t	gl_polyblend;
extern	cvar_t	gl_flashblend;
extern	cvar_t	gl_nocolors;
extern	cvar_t	gl_finish;
extern	cvar_t	gl_fb_bmodels;
extern	cvar_t	gl_fb_models;
extern	cvar_t	gl_lightmode;
extern  cvar_t  gl_solidparticles;
extern	cvar_t	gl_playermip;


extern  cvar_t gl_part_explosions;
extern  cvar_t gl_part_trails;
extern  cvar_t gl_part_spikes;
extern  cvar_t gl_part_gunshots;
extern  cvar_t gl_part_blood;
extern  cvar_t gl_part_telesplash;
extern  cvar_t gl_part_blobs;
extern  cvar_t gl_part_lavasplash;
extern	cvar_t gl_part_inferno;

extern cvar_t gl_max_size, gl_scaleModelTextures, gl_scaleTurbTextures, gl_miptexLevel;
extern cvar_t gl_externalTextures_world, gl_externalTextures_bmodels;


extern	int		lightmode;		// set to gl_lightmode on mapchange

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;

// gl_warp.c
void GL_SubdivideSurface (msurface_t *fa);
void EmitBothSkyLayers (msurface_t *fa);
void EmitWaterPolys (msurface_t *fa);
void EmitSkyPolys (msurface_t *fa, qboolean mtex);
void CalcCausticTexCoords(float *v, float *s, float *t);
void EmitCausticsPolys (void);
void R_DrawSkyChain (void);
void R_LoadSky_f(void);
void R_AddSkyBoxSurface (msurface_t *fa);
void R_ClearSkyBox (void);
void R_DrawSkyBox (void);
extern qboolean	r_skyboxloaded;

// gl_draw.c
void GL_Set2D (void);

// gl_rmain.c
qboolean R_CullBox (vec3_t mins, vec3_t maxs);
qboolean R_CullSphere (vec3_t centre, float radius);
void R_RotateForEntity (entity_t *e);
void R_PolyBlend (void);
void R_BrightenScreen (void);
void R_DrawEntitiesOnList (visentlist_t *vislist);

// gl_rlight.c
void R_MarkLights (dlight_t *light, int bit, mnode_t *node);
void R_AnimateLight (void);
void R_RenderDlights (void);
int R_LightPoint (vec3_t p);

// gl_refrag.c
void R_StoreEfrags (efrag_t **ppefrag);

// gl_mesh.c
void GL_MakeAliasModelDisplayLists (model_t *m, aliashdr_t *hdr);

// gl_rsurf.c
void EmitDetailPolys (void);
void R_DrawBrushModel (entity_t *e);
void R_DrawWorld (void);
void R_DrawWaterSurfaces (void);
void R_DrawAlphaChain (void);
void GL_BuildLightmaps (void);

// gl_ngraph.c
void R_NetGraph (void);

// gl_rmisc.c
void R_InitOtherTextures(void);		

//vid_common_gl.c

//multitexturing
#define	GL_TEXTURE0_ARB 			0x84C0
#define	GL_TEXTURE1_ARB 			0x84C1
#define	GL_TEXTURE2_ARB 			0x84C2
#define	GL_TEXTURE3_ARB 			0x84C3
#define GL_MAX_TEXTURE_UNITS_ARB	0x84E2

//texture compression
#define GL_COMPRESSED_ALPHA_ARB					0x84E9
#define GL_COMPRESSED_LUMINANCE_ARB				0x84EA
#define GL_COMPRESSED_LUMINANCE_ALPHA_ARB		0x84EB
#define GL_COMPRESSED_INTENSITY_ARB				0x84EC
#define GL_COMPRESSED_RGB_ARB					0x84ED
#define GL_COMPRESSED_RGBA_ARB					0x84EE
#define GL_TEXTURE_COMPRESSION_HINT_ARB			0x84EF
#define GL_TEXTURE_IMAGE_SIZE_ARB				0x86A0
#define GL_TEXTURE_COMPRESSED_ARB				0x86A1
#define GL_NUM_COMPRESSED_TEXTURE_FORMATS_ARB	0x86A2
#define GL_COMPRESSED_TEXTURE_FORMATS_ARB		0x86A3

//combine extension
#define GL_COMBINE_EXT				0x8570
#define GL_COMBINE_RGB_EXT			0x8571
#define GL_RGB_SCALE_EXT			0x8573

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

extern lpMTexFUNC qglMultiTexCoord2f;
extern lpSelTexFUNC qglActiveTexture;

extern float gldepthmin, gldepthmax;
extern byte color_white[4], color_black[4];
extern qboolean gl_mtexable;
extern int gl_textureunits;
extern qboolean gl_combine, gl_add_ext;
extern qboolean gl_allow_ztrick;

qboolean CheckExtension (const char *extension);
void Check_Gamma (unsigned char *pal);
void VID_SetPalette (unsigned char *palette);
void GL_Init (void);

#endif