#ifndef R_SHADOW_H
#define R_SHADOW_H

extern cvar_t r_shadow_bumpscale_basetexture;
extern cvar_t r_shadow_bumpscale_bumpmap;
extern cvar_t r_shadow_debuglight;
extern cvar_t r_shadow_gloss;
extern cvar_t r_shadow_gloss2intensity;
extern cvar_t r_shadow_glossintensity;
extern cvar_t r_shadow_lightattenuationpower;
extern cvar_t r_shadow_lightattenuationscale;
extern cvar_t r_shadow_lightintensityscale;
extern cvar_t r_shadow_portallight;
extern cvar_t r_shadow_projectdistance;
extern cvar_t r_shadow_realtime_dlight;
extern cvar_t r_shadow_realtime_dlight_shadows;
extern cvar_t r_shadow_realtime_dlight_portalculling;
extern cvar_t r_shadow_realtime_world;
extern cvar_t r_shadow_realtime_world_dlightshadows;
extern cvar_t r_shadow_realtime_world_lightmaps;
extern cvar_t r_shadow_realtime_world_shadows;
extern cvar_t r_shadow_realtime_world_compile;
extern cvar_t r_shadow_realtime_world_compileshadow;
extern cvar_t r_shadow_scissor;
extern cvar_t r_shadow_shadow_polygonfactor;
extern cvar_t r_shadow_shadow_polygonoffset;
extern cvar_t r_shadow_singlepassvolumegeneration;
extern cvar_t r_shadow_texture3d;
extern cvar_t gl_ext_stenciltwoside;

void R_Shadow_Init(void);
void R_Shadow_VolumeFromList(int numverts, int numtris, const float *invertex3f, const int *elements, const int *neighbors, const vec3_t projectorigin, float projectdistance, int nummarktris, const int *marktris);
void R_Shadow_MarkVolumeFromBox(int firsttriangle, int numtris, const float *invertex3f, const int *elements, const vec3_t projectorigin, const vec3_t lightmins, const vec3_t lightmaxs, const vec3_t surfacemins, const vec3_t surfacemaxs);
void R_Shadow_RenderSurfacesLighting(const entity_render_t *ent, const texture_t *texture, int numsurfaces, msurface_t **surfacelist);
void R_Shadow_RenderMode_Begin(void);
void R_Shadow_RenderMode_ActiveLight(rtlight_t *rtlight);
void R_Shadow_RenderMode_Reset(void);
void R_Shadow_RenderMode_StencilShadowVolumes(void);
void R_Shadow_RenderMode_Lighting(qboolean stenciltest, qboolean transparent);
void R_Shadow_RenderMode_VisibleShadowVolumes(void);
void R_Shadow_RenderMode_VisibleLighting(qboolean stenciltest, qboolean transparent);
void R_Shadow_RenderMode_End(void);
void R_Shadow_SetupEntityLight(const entity_render_t *ent);

// light currently being rendered
extern rtlight_t *r_shadow_rtlight;

// this is the location of the eye in entity space
extern vec3_t r_shadow_entityeyeorigin;
// this is the location of the light in entity space
extern vec3_t r_shadow_entitylightorigin;
// this transforms entity coordinates to light filter cubemap coordinates
// (also often used for other purposes)
extern matrix4x4_t r_shadow_entitytolight;
// based on entitytolight this transforms -1 to +1 to 0 to 1 for purposes
// of attenuation texturing in full 3D (Z result often ignored)
extern matrix4x4_t r_shadow_entitytoattenuationxyz;
// this transforms only the Z to S, and T is always 0.5
extern matrix4x4_t r_shadow_entitytoattenuationz;

void R_Shadow_RenderVolume(int numvertices, int numtriangles, const float *vertex3f, const int *element3i);
qboolean R_Shadow_ScissorForBBox(const float *mins, const float *maxs);

// these never change, they are used to create attenuation matrices
extern matrix4x4_t matrix_attenuationxyz;
extern matrix4x4_t matrix_attenuationz;

rtexture_t *R_Shadow_Cubemap(const char *basename);

extern dlight_t *r_shadow_worldlightchain;

void R_Shadow_UpdateWorldLightSelection(void);

extern rtlight_t *r_shadow_compilingrtlight;

void R_RTLight_Update(dlight_t *light, int isstatic);
void R_RTLight_Compile(rtlight_t *rtlight);
void R_RTLight_Uncompile(rtlight_t *rtlight);

void R_ShadowVolumeLighting(qboolean visible);

int *R_Shadow_ResizeShadowElements(int numtris);

extern int maxshadowmark;
extern int numshadowmark;
extern int *shadowmark;
extern int *shadowmarklist;
extern int shadowmarkcount;
void R_Shadow_PrepareShadowMark(int numtris);

#endif