/usr/include/geomview/mg.h is in libgeomview-dev 1.9.5-1.
This file is owned by root:root, with mode 0o644.
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* Copyright (C) 1998-2000 Stuart Levy, Tamara Munzner, Mark Phillips
*
* This file is part of Geomview.
*
* Geomview is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* Geomview 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Geomview; see the file COPYING. If not, write
* to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
* USA, or visit http://www.gnu.org.
*/
/* Authors: Charlie Gunn, Stuart Levy, Tamara Munzner, Mark Phillips */
#ifndef MINNEGRAPHICSDEFS
#define MINNEGRAPHICSDEFS
/*
* Public interface to mg (minnegraphics) package.
*/
#include "color.h"
#include "point.h"
#include "transform.h"
#include "window.h"
#include "camera.h"
#include "appearance.h"
#include "bsptree.h"
#ifndef POLYLISTPDEFS
struct Poly;
struct Vertex;
#endif
#ifndef _GV_BSPTREE_P_H_
struct BSPTree;
#endif
typedef struct mgcontext mgcontext; /* Opaque typedef */
typedef int (*mgshadefunc)( int npoints, HPoint3 *points, Point3 *normals,
ColorA *colors, ColorA *newcolors );
typedef void (*mgwinchfunc)( /*mgcontext *mgc, void *data, int win_why, ...*/ );
typedef struct mgNDctx mgNDctx;
typedef int (*mgNDmapfunc)(mgNDctx *NDctx,
HPointN *NDpoint, HPoint3 *newpoint,
ColorA *newcolor);
struct mgNDctx
{
mgNDmapfunc mapHPtN;
void *(*saveCTX)(mgNDctx *NDctx);
void (*pushTN)(mgNDctx *NDctx, TransformN *leftTN);
void (*pushT)(mgNDctx *NDctx, Transform leftT);
void (*restoreCTX)(mgNDctx *NDctx, void *savedCTX);
BSPTree *bsptree;
};
struct mgfuncs { /* mg member functions; potentially changed per device */
short mg_devno; /* Current device number */
int (*mg_setdevice)(void);
int (*mg_feature)(int feature);
mgcontext * (*mg_ctxcreate)(/* int a1, ... */);
void (*mg_ctxdelete)(mgcontext *ctx);
int (*mg_ctxset)(/* a1, ... */);
int (*mg_ctxget)(int attr, void* valueptr);
int (*mg_ctxselect)(mgcontext *ctx);
void (*mg_sync)(void);
void (*mg_worldbegin)(void);
void (*mg_worldend)(void);
void (*mg_reshapeviewport)(void);
/* geometry transform support */
void (*mg_settransform)(Transform T);
void (*mg_gettransform)(Transform T);
void (*mg_identity)(void);
void (*mg_transform)(Transform T);
int (*mg_pushtransform)(void);
int (*mg_poptransform)(void);
/* texture transform support */
void (*mg_settxtransform)(Transform T);
void (*mg_gettxtransform)(Transform T);
void (*mg_txidentity)(void);
void (*mg_txtransform)(Transform T);
int (*mg_pushtxtransform)(void);
int (*mg_poptxtransform)(void);
/* appearances */
int (*mg_pushappearance)(void);
int (*mg_popappearance)(void);
const Appearance *(*mg_setappearance)(const Appearance *app, int merge);
const Appearance *(*mg_getappearance)(void);
int (*mg_setcamera)(Camera* cam);
void (*mg_polygon)(int nv, HPoint3 *v, int nn,
Point3 *n, int nc,ColorA *c);
void (*mg_polylist)(int np, struct Poly *p,
int nv, struct Vertex *v, int plflags);
void (*mg_mesh)(int wrap,int nu,int nv,HPoint3 *p,
Point3 *n, Point3 *nq, ColorA *c, TxST *ST,
int mflags);
void (*mg_line)(HPoint3 *p1, HPoint3 *p2);
void (*mg_polyline)(int nv, HPoint3 *v, int nc, ColorA *c,
int wrapped);
void (*mg_quads)(int nquads, HPoint3 *v, Point3 *n, ColorA *c,
int qflags);
void (*mg_bezier)(int du, int dv, int dimn, float *ctrlpts,
TxST *txmapst, ColorA *c);
void (*mg_bsptree)(struct BSPTree *bsptree);
const void *(*mg_tagappearance)(void);
void (*mg_untagappearance)(const void *tag);
void (*mg_taggedappearance)(const void *tag);
};
extern struct mgfuncs _mgf;
/* Common mg attributes -- for mgctxcreate(), mgctxset(), mgctxget() */
#define MG_END 0
#define MG_WINDOW 128 /* WnWindow * */
#define MG_PARENT 129 /* mgcontext *context (of parent window)*/
#define MG_SHOW 130 /* int visible (make window visible) */
#define MG_SETOPTIONS 131 /* int mask (of options to enable) see */
#define MG_UNSETOPTIONS 132 /* int mask (options to disable) mg.h */
#define MG_BACKGROUND 133 /* ColorA * */
#define MG_CAMERA 134 /* Camera * */
#define MG_APPEAR 135 /* Appearance *default_appearance */
#define MG_ApSet 136 /* Appearance create list */
#define MG_WnSet 137 /* Window create list */
#define MG_CamSet 138 /* Camera create list */
#define MG_ZNUDGE 139 /* float; fraction of Z-range by which lines &
* edges are nudged nearer than polygons.
*/
#define MG_NDCTX 140 /* mgNDctx * */
/* Note 140, 141, 142 used to be MG_EUCLIDEAN, MG_HYPERBOLIC, and
MG_SPHERICAL, which are now obsolete. These numbers may be reused now. */
#define MG_SHADER 143 /* mgshadefunc *shader_function */
#define MG_SHADERDATA 144 /* void *shaderdata (interpreted by shader) */
#define MG_ABLOCK 145 /* void *ablock */
#define MG_SPACE 146 /* TM_EUCLIDEAN, TM_HYPERBOLIC,
or TM_SPHERICAL */
/* More control options: needed initially for X11, but might exist
* some day for others.
*/
#define MG_DITHER 150 /* Dithering control: 1(on)/0(off) */
#define MG_DEPTHSORT 151 /* Depth sorting: one of: */
enum sortmethod {MG_NONE, MG_DEPTH, MG_ZBUFFER};
#define MG_BITDEPTH 152 /* frame buffer depth (1,8,24,...?) */
#define MG_WINCHANGE 153 /* void *winchange(ctx, void *data)
* function, called when someone asks this
* mg window to change (size, border, etc.)
*/
#define MG_WINCHANGEDATA 154 /* void *data param for winchange() callback */
/* win_why values for (*winchange) callback */
#define MGW_WINCHANGE 1 /* Window data (pos'n, size, title, ...) change */
#define MGW_WINDELETE 2 /* Window being deleted */
#define MGW_DOUBLEBUF 3 /* Double-buffering state changed; called as */
/* winchange(mgc, info, MGW_DOUBLEBUF, is_double) */
/* Other values, 16 and up, may be per-device */
/* NOTE: the MG_SPACE attribute specifies the space in which the
objects being drawn live. It serves the same purpose as the
NeXT-specific attribute MG_GEOMTYPE, which should eventually
be phased out. mbp Fri Dec 11 14:51:30 1992 */
/* Possible MG Features */
#define MGF_BEZIER 100 /* Driver supports mgbezier */
/* Bitwise ORable options for mg_ctxset MG_[UN]SETOPTIONS */
#define MGO_DOUBLEBUFFER 0x1 /* Default single buffered */
#define MGO_HIDDEN 0x2 /* Default not Z-buffered */
#define MGO_BACKFACECULL 0x4 /* Default back-faces shown */
#define MGO_INHIBITBACKGROUND 0x8 /* Default background drawn */
#define MGO_INHIBITCLEAR 0x10 /* Default clear at worldbegin*/
#define MGO_INHIBITSWAP 0x20 /* Default swapbufs at worldend */
#define MGO_NORED 0x40 /* Inhibit drawing into red */
#define MGO_NOGREEN 0x80 /* ... green ... */
#define MGO_NOBLUE 0x100 /* ... or blue planes */
#define MGO_INHIBITCAM 0x200 /* Don't load matrix in worldbegin() */
/* mgmesh 'style' values */
#define MM_NOWRAP 0
#define MM_UWRAP 1
#define MM_VWRAP 2
/* mergeflag values for mgsetappearance() */
#define MG_SET 0
#define MG_MERGE 1
#define mgctxselect( mgc ) (*_mgf.mg_ctxselect)( mgc )
#define mgctxcreate (*_mgf.mg_ctxcreate)
#define mgctxdelete( mgc ) (*_mgf.mg_ctxdelete)( mgc )
#define mgctxset (*_mgf.mg_ctxset)
#define mgctxget( attr, valuep ) (*_mgf.mg_ctxget)( attr, valuep )
/* appearnce stack */
#define mgpushappearance() (*_mgf.mg_pushappearance)()
#define mgpopappearance() (*_mgf.mg_popappearance)()
#define mgsetappearance( ap, merge ) (*_mgf.mg_setappearance)( ap, merge )
#define mggetappearance() (*_mgf.mg_getappearance)()
#define mgtagappearance() (*_mgf.mg_tagappearance)()
#define mguntagappearance(tag) (*_mgf.mg_untagappearance)(tag)
#define mgtaggedappearance(tag) (*_mgf.mg_taggedappearance)(tag)
#define mgsetcamera( cam ) (*_mgf.mg_setcamera)( cam )
/* transform stack */
#define mgsettransform( T ) (*_mgf.mg_settransform)( T )
#define mggettransform( T ) (*_mgf.mg_gettransform)( T )
#define mgidentity() (*_mgf.mg_identity)()
#define mgtransform( T ) (*_mgf.mg_transform)( T )
#define mgpushtransform() (*_mgf.mg_pushtransform)()
#define mgpoptransform() (*_mgf.mg_poptransform)()
/* texture transform stack */
#define mgsettxtransform( T ) (*_mgf.mg_settxtransform)( T )
#define mggettxtransform( T ) (*_mgf.mg_gettxtransform)( T )
#define mgtxidentity() (*_mgf.mg_txidentity)()
#define mgtxtransform( T ) (*_mgf.mg_txtransform)( T )
#define mgpushtxtransform() (*_mgf.mg_pushtxtransform)()
#define mgpoptxtransform() (*_mgf.mg_poptxtransform)()
#define mgreshapeviewport() (*_mgf.mg_reshapeviewport)()
#define mgworldbegin() (*_mgf.mg_worldbegin)()
#define mgsync( ) (*_mgf.mg_sync)()
#define mgworldend() (*_mgf.mg_worldend)()
#define mgpolygon(nv,v, nn, n, nc, c) \
(*_mgf.mg_polygon)( nv,v, nn,n, nc,c )
#define mgpolylist(np, p, nv, v, flags) \
(*_mgf.mg_polylist)(np, p, nv, v, flags)
#define mgmesh(style, nu, nv, v, n, nq, c, mflags) \
(*_mgf.mg_mesh)(style, nu, nv, v, n, nq, c, NULL, mflags)
#define mgmeshst(style, nu, nv, v, n, nq, c ,st, mflags) \
(*_mgf.mg_mesh)(style, nu, nv, v, n, nq, c, st, mflags)
#define mgline(p1, p2) \
(*_mgf.mg_line)( p1, p2 )
#define mgpolyline(nv, v, nc,c, wrap) \
(*_mgf.mg_polyline)(nv, v, nc, c, wrap )
#define mgquads(nquad, v, n, c, qflags) \
(*_mgf.mg_quads)(nquad, v, n, c, qflags)
#define mgbezier(du, dv, dimn, ctrlpts, tx, c ) \
(*_mgf.mg_bezier)(du, dv, dimn, ctrlpts, tx, c)
#define mgbsptree(bsptree) \
(*_mgf.mg_bsptree)(bsptree)
#define mgfeature( feature ) (*_mgf.mg_feature)( feature )
extern mgcontext *mgcurrentcontext(); /* Get ptr to current context */
extern int mgbegin( void ); /* Init, select default dev */
extern int mgend( void ); /* Shut down */
extern int mgclonefrom( mgcontext *other ); /* Init cur mgctx from other */
/*
* Sample software-shading function, usable as MG_SHADER.
*/
extern int mg_eucshade( int npoints, HPoint3 *points, Point3 *normals,
ColorA *colors, ColorA *newcolors );
/*
* Polling routine, intended to be called roughly once per
* render cycle, which detects and purges textures which don't
* seem to be in use.
*/
extern int mg_textureclock(void);
#define CURRENTMGTYPE() (_mgf.mg_devno)
/*
* Device select routines -- set default for future mgctxcreate()'s
*/
extern int mgdevice_GL( void );
extern int mgdevice_X11( void );
extern int mgdevice_XGL( void );
extern int mgdevice_RIB( void );
extern int mgdevice_RI( void );
extern int mgdevice_PS( void );
extern int mgdevice_VT100( void );
extern int mgdevice_XT( void );
extern int mgdevice_MAC( void );
extern int mgdevice_TEK( void );
extern int mgdevice_TELETYPE( void );
extern int mgdevice_PUNCHCARD( void );
extern int mgdevice_SIMSTIM( void );
extern int mgdevice_NULL( void );
extern int mgdevice_BUF( void );
extern int mgdevice_OPENGL( void );
extern int mgdevice_PICK( void );
extern int mgdevice_PRIM( void );
extern int mgdevice( int deviceno ); /* Alternative to the above */
#define MGD_NODEV -1 /* error return: can't select that device */
#define MGD_NULL 0 /* no device, just return current one */
#define MGD_GL 1 /* SGI GL */
#define MGD_XGL 2 /* Sun XGL */
#define MGD_X11 3 /* Generic X11 */
#define MGD_RIB 4 /* Renderman RIB*/
#define MGD_PS 5 /* Postscript */
#define MGD_RI 6 /* Quick Renderman */
#define MGD_BUF 7 /* Raster buffer */
#define MGD_OPENGL 8 /* Open GL */
#define MGD_PICK 9 /* software pick */
#define MGD_PRIM 10 /* geometric data */
#endif
/*
* Local Variables: ***
* c-basic-offset: 2 ***
* End: ***
*/
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