zbuf.h

Go to the documentation of this file.

/*
 * $Id: zbuf.h 35233 2011-02-27 19:31:27Z jesterking $
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * Full recode: 2004-2006 Blender Foundation
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */

#ifndef ZBUF_H
#define ZBUF_H

struct RenderPart;
struct RenderLayer;
struct LampRen;
struct VlakRen;
struct ListBase;
struct ZSpan;
struct APixstrand;
struct APixstr;
struct StrandShadeCache;

void fillrect(int *rect, int x, int y, int val);

void projectvert(float *v1, float winmat[][4], float *adr);
void projectverto(float *v1, float winmat[][4], float *adr);
int testclip(float *v); 

void zbuffer_shadow(struct Render *re, float winmat[][4], struct LampRen *lar, int *rectz, int size, float jitx, float jity);
void zbuffer_abuf_shadow(struct Render *re, struct LampRen *lar, float winmat[][4], struct APixstr *APixbuf, struct APixstrand *apixbuf, struct ListBase *apsmbase, int size, int samples, float (*jit)[2]);
void zbuffer_solid(struct RenderPart *pa, struct RenderLayer *rl, void (*fillfunc)(struct RenderPart*, struct ZSpan*, int, void*), void *data);

unsigned short *zbuffer_transp_shade(struct RenderPart *pa, struct RenderLayer *rl, float *pass, struct ListBase *psmlist);
void zbuffer_sss(RenderPart *pa, unsigned int lay, void *handle, void (*func)(void*, int, int, int, int, int));
int zbuffer_strands_abuf(struct Render *re, struct RenderPart *pa, struct APixstrand *apixbuf, struct ListBase *apsmbase, unsigned int lay, int negzmask, float winmat[][4], int winx, int winy, int sample, float (*jit)[2], float clipcrop, int shadow, struct StrandShadeCache *cache);

typedef struct APixstr {
        unsigned short mask[4];         /* jitter mask */
        int z[4];                                       /* distance    */
        int p[4];                                       /* index       */
        int obi[4];                                     /* object instance */
        short shadfac[4];                       /* optimize storage for irregular shadow */
        struct APixstr *next;
} APixstr;

typedef struct APixstrand {
        unsigned short mask[4];         /* jitter mask */
        int z[4];                                       /* distance    */
        int p[4];                                       /* index       */
        int obi[4];                                     /* object instance */
        int seg[4];                                     /* for strands, segment number */
        float u[4], v[4];                       /* for strands, u,v coordinate in segment */
        struct APixstrand *next;
} APixstrand;

typedef struct APixstrMain
{
        struct APixstrMain *next, *prev;
        void *ps;
} APixstrMain;

/* span fill in method, is also used to localize data for zbuffering */
typedef struct ZSpan {
        int rectx, recty;                                               /* range for clipping */
        
        int miny1, maxy1, miny2, maxy2;                 /* actual filled in range */
        float *minp1, *maxp1, *minp2, *maxp2;   /* vertex pointers detect min/max range in */
        float *span1, *span2;
        
        float zmulx, zmuly, zofsx, zofsy;               /* transform from hoco to zbuf co */
        
        int *rectz, *arectz;                                    /* zbuffers, arectz is for transparant */
        int *rectz1;                                                    /* seconday z buffer for shadowbuffer (2nd closest z) */
        int *rectp;                                                             /* polygon index buffer */
        int *recto;                                                             /* object buffer */
        int *rectmask;                                                  /* negative zmask buffer */
        APixstr *apixbuf, *curpstr;                             /* apixbuf for transparent */
        APixstrand *curpstrand;                                 /* same for strands */
        struct ListBase *apsmbase;
        
        int polygon_offset;                                             /* offset in Z */
        float shad_alpha;                                               /* copy from material, used by irregular shadbuf */
        int mask, apsmcounter;                                  /* in use by apixbuf */
        int apstrandmcounter;

        float clipcrop;                                                 /* for shadow, was in R global before */

        void *sss_handle;                                               /* used by sss */
        void (*sss_func)(void *, int, int, int, int, int);
        
        void (*zbuffunc)(struct ZSpan *, int, int, float *, float *, float *, float *);
        void (*zbuflinefunc)(struct ZSpan *, int, int, float *, float *);
        
} ZSpan;

/* exported to shadbuf.c */
void zbufclip4(struct ZSpan *zspan, int obi, int zvlnr, float *f1, float *f2, float *f3, float *f4, int c1, int c2, int c3, int c4);
void zbuf_free_span(struct ZSpan *zspan);
void freepsA(struct ListBase *lb);

/* to rendercore.c */
void zspan_scanconvert(struct ZSpan *zpan, void *handle, float *v1, float *v2, float *v3, void (*func)(void *, int, int, float, float) );

/* exported to edge render... */
void zbufclip(struct ZSpan *zspan, int obi, int zvlnr, float *f1, float *f2, float *f3, int c1, int c2, int c3);
void zbuf_alloc_span(struct ZSpan *zspan, int rectx, int recty, float clipcrop);
void zbufclipwire(struct ZSpan *zspan, int obi, int zvlnr, int ec, float *ho1, float *ho2, float *ho3, float *ho4, int c1, int c2, int c3, int c4);

/* exported to shadeinput.c */
void zbuf_make_winmat(Render *re, float winmat[][4]);
void zbuf_render_project(float winmat[][4], float *co, float *ho);

#endif