// disable data conversion warnings

#pragma warning(disable : 4244)     // MIPS
#pragma warning(disable : 4136)     // X86
#pragma warning(disable : 4051)     // ALPHA
  
#include <windows.h>

#include <gl\gl.h>
#include <gl\glu.h>

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


// 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;

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, qboolean modulate);
void GL_Upload8 (byte *data, int width, int height,  qboolean mipmap, qboolean alpha, qboolean modulate);
int GL_LoadTexture (char *identifier, int width, int height, byte *data, int mipmap, int alpha, int modulate);
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;

extern  PROC glArrayElementEXT;
extern  PROC glColorPointerEXT;
extern  PROC glTexturePointerEXT;
extern  PROC glVertexPointerEXT;


// r_local.h -- private refresh defs

#define MAXALIASVERTS   2000  // TODO: tune this

#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 particletexture;
extern  int playertextures;

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

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_dynamic;

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_fogblend;
extern  cvar_t  gl_polyblend;
extern  cvar_t  gl_keeptjunctions;
extern  cvar_t  gl_reporttjunctions;

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

void R_TranslatePlayerSkin (int playernum);
void GL_Bind (int texnum);