/*
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.

*/

#ifndef RENDER_H
#define RENDER_H

#include "mathlib.h"
#include "vid.h"

// render.h -- public interface to refresh functions

#define	TOP_RANGE	16	// soldier uniform colors
#define	BOTTOM_RANGE	96

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

typedef struct efrag_s {
    struct mleaf_s *leaf;
    struct efrag_s *leafnext;
    struct entity_s *entity;
    struct efrag_s *entnext;
} efrag_t;


typedef struct entity_s {
    int keynum;			// for matching entities in different frames
    vec3_t origin;
    vec3_t angles;
    struct model_s *model;	// NULL = no model
    int frame;
    byte *colormap;
    int skinnum;		// for Alias models

    struct player_info_s *scoreboard;	// identify player

    float syncbase;		// for client-side animations

    struct efrag_s *efrag;	// linked list of efrags (FIXME)
    int visframe;		// last frame this entity was
    // found in an active leaf

    int dlightframe;		// dynamic lighting
    int dlightbits;

// FIXME: could turn these into a union
    int trivial_accept;
    struct mnode_s *topnode;	// for bmodels, first world node
    //  that splits bmodel, or NULL if
    //  not split
} entity_t;

// !!! if this is changed, it must be changed in asm_draw.h too !!!
typedef struct {
    vrect_t vrect;		// subwindow in video for refresh
    // FIXME: not need vrect next field here?
    vrect_t aliasvrect;		// scaled Alias version
    int vrectright, vrectbottom;	// right & bottom screen coords
    int aliasvrectright, aliasvrectbottom;	// scaled Alias versions
    float vrectrightedge;	// rightmost right edge we care about,
    //  for use in edge list
    float fvrectx, fvrecty;	// for floating-point compares
    float fvrectx_adj, fvrecty_adj;	// left and top edges, for clamping
    int vrect_x_adj_shift20;	// (vrect.x + 0.5 - epsilon) << 20
    int vrectright_adj_shift20;	// (vrectright + 0.5 - epsilon) << 20
    float fvrectright_adj, fvrectbottom_adj;
    // right and bottom edges, for clamping
    float fvrectright;		// rightmost edge, for Alias clamping
    float fvrectbottom;		// bottommost edge, for Alias clamping
    float horizontalFieldOfView;	// at Z = 1.0, this many X is visible
    // 2.0 = 90 degrees
    float xOrigin;		// should probably allways be 0.5
    float yOrigin;		// between be around 0.3 to 0.5

    vec3_t vieworg;
    vec3_t viewangles;

    float fov_x, fov_y;

    int ambientlight;
} refdef_t;


//
// refresh
//

extern refdef_t r_refdef;
extern vec3_t r_origin, vpn, vright, vup;

extern struct texture_s *r_notexture_mip;

extern entity_t r_worldentity;

void R_Init(void);
void R_InitTextures(void);
void R_InitEfrags(void);
void R_RenderView(void);	// must set r_refdef first
void R_ViewChanged(vrect_t *pvrect, int lineadj, float aspect);
				// called whenever r_refdef or vid change

void R_InitSky(struct texture_s *mt);	// called at level load

void R_AddEfrags(entity_t *ent);
void R_RemoveEfrags(entity_t *ent);

void R_NewMap(void);

void R_NetGraph(void);
void R_ZGraph(void);

void R_ParseParticleEffect(void);
void R_RunParticleEffect(vec3_t org, vec3_t dir, int color, int count);
void R_RocketTrail(vec3_t start, vec3_t end, int type);

void R_EntityParticles(entity_t *ent);
void R_BlobExplosion(vec3_t org);
void R_ParticleExplosion(vec3_t org);
void R_LavaSplash(vec3_t org);
void R_TeleportSplash(vec3_t org);

void R_PushDlights(void);

void R_InitParticles(void);
void R_ClearParticles(void);
void R_DrawParticles(void);

//
// surface cache related
//
extern qboolean r_cache_thrash;	// set if thrashing the surface cache

int D_SurfaceCacheForRes(int width, int height);
void D_FlushCaches(void);
void D_DeleteSurfaceCache(void);
void D_InitCaches(void *buffer, int size);
void R_SetVrect(vrect_t *pvrect, vrect_t *pvrectin, int lineadj);

//
// used in surf8.S and surf16.S
//
extern void *colormap;

#endif /* RENDER_H */
