/*
 ** License Applicability. Except to the extent portions of this file are
 ** made subject to an alternative license as permitted in the SGI Free
 ** Software License B, Version 1.1 (the "License"), the contents of this
 ** file are subject only to the provisions of the License. You may not use
 ** this file except in compliance with the License. You may obtain a copy
 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
 **
 ** http://oss.sgi.com/projects/FreeB
 **
 ** Note that, as provided in the License, the Software is distributed on an
 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
 **
 ** Original Code. The Original Code is: OpenGL Sample Implementation,
 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
 ** Copyright in any portions created by third parties is as indicated
 ** elsewhere herein. All Rights Reserved.
 **
 ** Additional Notice Provisions: The application programming interfaces
 ** established by SGI in conjunction with the Original Code are The
 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
 ** Window System(R) (Version 1.3), released October 19, 1998. This software
 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
 ** published by SGI, but has not been independently verified as being
 ** compliant with the OpenGL(R) version 1.2.1 Specification.
 */

/*
 * nurbstess.c++
 *
 * $Date: 2006/03/14 15:08:52 $ $Revision: 1.2 $
 * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/nurbstess.cc,v 1.2 2006/03/14 15:08:52 brianp Exp $
 */

#include "glimports.h"
#include "myassert.h"
#include "mysetjmp.h"
#include "mystdio.h"
#include "nurbsconsts.h"
#include "nurbstess.h"
#include "bufpool.h"
#include "quilt.h"
#include "knotvector.h"
#include "mapdesc.h"
#include "maplist.h"

void 
NurbsTessellator::set_domain_distance_u_rate(REAL u_rate)
{
	subdivider.set_domain_distance_u_rate(u_rate);
}

void 
NurbsTessellator::set_domain_distance_v_rate(REAL v_rate)
{
	subdivider.set_domain_distance_v_rate(v_rate);
}

void
NurbsTessellator::set_is_domain_distance_sampling(int flag)
{
	subdivider.set_is_domain_distance_sampling(flag);
}

void
NurbsTessellator::resetObjects( void )
{
	subdivider.clear();
}

void
NurbsTessellator::makeobj( int )
{
#ifndef NDEBUG
	_glu_dprintf( "makeobj\n" );
#endif
}

void
NurbsTessellator::closeobj( void )
{
#ifndef NDEBUG
	_glu_dprintf( "closeobj\n" );
#endif
}

void
NurbsTessellator::bgnrender( void )
{
#ifndef NDEBUG
	_glu_dprintf( "bgnrender\n" );
#endif
}

void
NurbsTessellator::endrender( void )
{
#ifndef NDEBUG
	_glu_dprintf( "endrender\n" );
#endif
}

/*-----------------------------------------------------------------------------
 * do_freebgnsurface - free o_surface structure 
 *
 * Client: do_freeall(), bgnsurface()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_freebgnsurface( O_surface *o_surface )
{
	o_surface->deleteMe( o_surfacePool );
}


/*-----------------------------------------------------------------------------
 * do_bgnsurface - begin the display of a surface
 *
 * Client: bgnsurface()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_bgnsurface( O_surface *o_surface )
{
	if( inSurface ) {
		do_nurbserror( 27 );
		endsurface();
	}
	inSurface = 1;

	if( ! playBack ) bgnrender();

	isTrimModified = 0;
	isSurfaceModified = 0;
	isDataValid = 1;
	numTrims = 0;
	currentSurface = o_surface;
	nextTrim = &( currentSurface->o_trim );
	nextNurbssurface = &( currentSurface->o_nurbssurface );
}

/*-----------------------------------------------------------------------------
 * do_bgncurve - begin the display of a curve 
 * 
 * Client: bgncurve()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_bgncurve( O_curve *o_curve )
{
	if ( inCurve ) {
		do_nurbserror( 6 );
		endcurve();
	}

	inCurve = 1;
	currentCurve = o_curve;
	currentCurve->curvetype = ct_none;

	if( inTrim ) {
		if( *nextCurve != o_curve ) {
			isCurveModified = 1;
			*nextCurve = o_curve;
		}
	} else {
		if( ! playBack ) bgnrender();
		isDataValid = 1;
	}
	nextCurve = &(o_curve->next);
	nextPwlcurve = &(o_curve->curve.o_pwlcurve);
	nextNurbscurve = &(o_curve->curve.o_nurbscurve);
}

/*-----------------------------------------------------------------------------
 * do_endcurve -
 * 
 * Client: endcurve()
 *-----------------------------------------------------------------------------
 */

void
NurbsTessellator::do_endcurve( void )
{
	if( ! inCurve ) {
		do_nurbserror( 7 );
		return;
	}
	inCurve = 0;

	*nextCurve = 0;
	if (currentCurve->curvetype == ct_nurbscurve)
		*nextNurbscurve = 0;
	else
		*nextPwlcurve = 0;

	if ( ! inTrim ) {
		if( ! isDataValid ) {
			do_freecurveall( currentCurve ); 
			return;
		}

		int errval;
		errval = ::mysetjmp( jumpbuffer );
		if( errval == 0 ) {
			if( currentCurve->curvetype == ct_nurbscurve ) {
				subdivider.beginQuilts();
				for( O_nurbscurve *n = currentCurve->curve.o_nurbscurve; n != 0; n = n->next ) 
					subdivider.addQuilt( n->bezier_curves );
				subdivider.endQuilts();
				subdivider.drawCurves(); 
				if( ! playBack ) endrender();
			} else {
				/* XXX */
				if( ! playBack ) endrender();
				/*do_draw_pwlcurve( currentCurve->curve.o_pwlcurve ) */;
				do_nurbserror( 9 );
			}
		} else {
			if( ! playBack ) endrender();
			do_nurbserror( errval );
		}
		do_freecurveall( currentCurve );
		resetObjects();
	}
}

/*-----------------------------------------------------------------------------
 * do_endsurface - mark end of surface, display surface, free immediate data 
 *
 * Client:
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_endsurface( void )
{
	if( inTrim ) {
		do_nurbserror( 12 );
		endtrim();
	}

	if( ! inSurface ) {
		do_nurbserror( 13 );
		return;
	}
	inSurface = 0;

	*nextNurbssurface = 0;

	if( ! isDataValid ) {
		do_freeall( ); 
		return;
	}

	if( *nextTrim != 0 ) {
		isTrimModified = 1;
		*nextTrim = 0;
	}

	int errval;

	errval = ::mysetjmp( jumpbuffer );
	if( errval == 0 ) {
		if( numTrims > 0 ) {

			subdivider.beginTrims();
			for( O_trim	*trim = currentSurface->o_trim; trim; trim = trim->next ) {
				subdivider.beginLoop();
				for( O_curve *curve = trim->o_curve; curve; curve = curve->next ) {  
					curve->used = 0;
					assert( curve->curvetype != ct_none );
					if (curve->curvetype == ct_pwlcurve) {
						O_pwlcurve *c = curve->curve.o_pwlcurve; 
						subdivider.addArc( c->npts, c->pts, curve->nuid );
					} else {
						Quilt	   *quilt = curve->curve.o_nurbscurve->bezier_curves;
						Quiltspec  *qspec = quilt->qspec;
						REAL       *cpts  = quilt->cpts + qspec->offset;
						REAL       *cptsend = cpts + (qspec->width * qspec->order * qspec->stride);
						for( ; cpts != cptsend; cpts += qspec->order*qspec->stride ) 
							subdivider.addArc( cpts, quilt, curve->nuid );
					}
				}
				subdivider.endLoop();
			}
			subdivider.endTrims();
		}

		subdivider.beginQuilts();
		for( O_nurbssurface *n = currentSurface->o_nurbssurface; n; n = n->next ) 
			subdivider.addQuilt( n->bezier_patches );
		subdivider.endQuilts();
		subdivider.drawSurfaces( currentSurface->nuid ); 
		if( ! playBack ) endrender();
	} else {
		if( ! playBack ) endrender();
		do_nurbserror( errval );
	}

	do_freeall( );
	resetObjects();
}

/*-----------------------------------------------------------------------------
 * do_freeall - free all data allocated in immediate mode
 *
 * Client:
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_freeall( void )
{
	for( O_trim *o_trim = currentSurface->o_trim; o_trim; ) {
		O_trim *next_o_trim = o_trim->next;
		for( O_curve *curve = o_trim->o_curve; curve; ) {
			O_curve *next_o_curve = curve->next;
			do_freecurveall( curve );
			curve = next_o_curve;
		}
		if( o_trim->save == 0 ) do_freebgntrim( o_trim );
		o_trim = next_o_trim;
	}

	O_nurbssurface *nurbss, *next_nurbss;
	for( nurbss= currentSurface->o_nurbssurface; nurbss; nurbss = next_nurbss) {
		next_nurbss = nurbss->next;
		if( nurbss->save == 0 )
			do_freenurbssurface( nurbss );
		else
			nurbss->used = 0;
	}

	if( currentSurface->save == 0 ) do_freebgnsurface( currentSurface );
}

void
NurbsTessellator::do_freecurveall( O_curve *curve )
{
	assert( curve->curvetype != ct_none );

	if( curve->curvetype == ct_nurbscurve ) {
		O_nurbscurve *ncurve, *next_ncurve;
		for( ncurve=curve->curve.o_nurbscurve; ncurve; ncurve=next_ncurve ) {
			next_ncurve = ncurve->next;
			if( ncurve->save == 0 )
				do_freenurbscurve( ncurve );
			else
				ncurve->used = 0;
		}
	} else {
		O_pwlcurve *pcurve, *next_pcurve;
		for( pcurve=curve->curve.o_pwlcurve; pcurve; pcurve=next_pcurve ) {
			next_pcurve = pcurve->next;
			if( pcurve->save == 0 )
				do_freepwlcurve( pcurve );
			else
				pcurve->used = 0;
		}
	}
	if( curve->save == 0 )
		do_freebgncurve( curve );
}


/*-----------------------------------------------------------------------------
 * do_freebgntrim - free the space allocated for a trim loop
 *
 * Client:
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_freebgntrim( O_trim *o_trim )
{ 
	o_trim->deleteMe( o_trimPool );
}


/*-----------------------------------------------------------------------------
 * do_bgntrim - link in a trim loop to the current trimmed surface description
 *
 * Client: bgntrim()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_bgntrim( O_trim *o_trim )
{

	if( ! inSurface ) {
		do_nurbserror( 15 );
		bgnsurface( 0 );
		inSurface = 2;
	}

	if( inTrim ) {
		do_nurbserror( 16 );
		endtrim();
	}
	inTrim = 1;

	if( *nextTrim != o_trim ) {
		isTrimModified = 1;	
		*nextTrim = o_trim;
	}

	currentTrim = o_trim;
	nextTrim = &(o_trim->next);
	nextCurve = &(o_trim->o_curve);
}


/*-----------------------------------------------------------------------------
 * do_endtrim - mark the end of the current trim loop 
 *
 * Client: endtrim()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_endtrim( void )
{
	if( ! inTrim ) {
		do_nurbserror( 17 );
		return;
	}
	inTrim = 0;

	if( currentTrim->o_curve == 0 ) {
		do_nurbserror( 18 );
		isDataValid = 0;
	}

	numTrims++;

	if( *nextCurve != 0 ) {
		isTrimModified = 1;
		*nextCurve = 0;	
	}
}

/*-----------------------------------------------------------------------------
 * do_freepwlcurve -
 * 
 * Client:
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_freepwlcurve( O_pwlcurve *o_pwlcurve )
{
	o_pwlcurve->deleteMe( o_pwlcurvePool );
}

void
NurbsTessellator::do_freebgncurve( O_curve *o_curve )
{
	o_curve->deleteMe( o_curvePool );
}

/*-----------------------------------------------------------------------------
 * do_pwlcurve - link in pwl trim loop to the current surface description
 * 
 * Client: pwlcurve()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_pwlcurve( O_pwlcurve *o_pwlcurve )
{
	if( ! inTrim ) {
		do_nurbserror( 19 );
		if( o_pwlcurve->save == 0 )
			do_freepwlcurve(o_pwlcurve );
		return;
	}

	if( ! inCurve ) {
		bgncurve( 0 );
		inCurve = 2;
	}

	if( o_pwlcurve->used ) {
		do_nurbserror( 20 );
		isDataValid = 0;
		return;
	} else
		o_pwlcurve->used = 1;

	if( currentCurve->curvetype == ct_none ) {
		currentCurve->curvetype = ct_pwlcurve;
	} else if( currentCurve->curvetype != ct_pwlcurve ) {
		do_nurbserror( 21 );
		isDataValid = 0;
		return;
	}

	if( *nextPwlcurve != o_pwlcurve ) {
		isCurveModified = 1;
		*nextPwlcurve = o_pwlcurve;
	}
	nextPwlcurve = &(o_pwlcurve->next);

	if( o_pwlcurve->owner != currentCurve ) {
		isCurveModified = 1;
		o_pwlcurve->owner = currentCurve;
	}

	if( (inCurve == 2) ) 
		endcurve();
}


/*-----------------------------------------------------------------------------
 * do_freenurbscurve -
 * 
 * Client:
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_freenurbscurve( O_nurbscurve *o_nurbscurve )
{
	o_nurbscurve->bezier_curves->deleteMe( quiltPool );
	o_nurbscurve->deleteMe( o_nurbscurvePool );
}


/*-----------------------------------------------------------------------------
 * do_nurbscurve -
 * 
 * Client: nurbscurve() 
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_nurbscurve( O_nurbscurve *o_nurbscurve )
{
	if ( ! inCurve ) {
		bgncurve( 0 );
		inCurve = 2;
	}

	if( o_nurbscurve->used ) {
		/* error - curve was already called in current surface */
		do_nurbserror( 23 );
		isDataValid = 0;
		return;
	} else
		o_nurbscurve->used = 1;

	if( currentCurve->curvetype == ct_none ) {
		currentCurve->curvetype = ct_nurbscurve;
	} else if( currentCurve->curvetype != ct_nurbscurve ) {
		do_nurbserror( 24 );
		isDataValid = 0;
		return;
	}

	if( *nextNurbscurve != o_nurbscurve ) {
		isCurveModified = 1;
		*nextNurbscurve = o_nurbscurve;
	}

	nextNurbscurve = &(o_nurbscurve->next);

	if( o_nurbscurve->owner != currentCurve ) {
		isCurveModified = 1;
		o_nurbscurve->owner = currentCurve;
	}

	if( o_nurbscurve->owner == 0 )
		isCurveModified = 1;

	if( inCurve == 2 )
		endcurve();
}


/*-----------------------------------------------------------------------------
 * do_freenurbssurface -
 *
 * Client:
 *-----------------------------------------------------------------------------
 */

void
NurbsTessellator::do_freenurbssurface( O_nurbssurface *o_nurbssurface )
{
	o_nurbssurface->bezier_patches->deleteMe( quiltPool );
	o_nurbssurface->deleteMe( o_nurbssurfacePool );
}

/*-----------------------------------------------------------------------------
 * do_nurbssurface -
 * 
 * Client: nurbssurface()
 *-----------------------------------------------------------------------------
 */
void
NurbsTessellator::do_nurbssurface( O_nurbssurface *o_nurbssurface )
{
	if( ! inSurface ) {
		bgnsurface( 0 );
		inSurface = 2;
	}

	if( o_nurbssurface->used ) {
		/* error - surface was already called in current block */
		do_nurbserror( 25 );
		isDataValid = 0;
		return;
	} else
		o_nurbssurface->used = 1;

	if( *nextNurbssurface != o_nurbssurface ) {
		isSurfaceModified = 1;
		*nextNurbssurface  = o_nurbssurface;
	}

	if( o_nurbssurface->owner != currentSurface ) {
		isSurfaceModified = 1;
		o_nurbssurface->owner = currentSurface;
	}
	nextNurbssurface = &(o_nurbssurface->next);

	if( inSurface == 2  )
		endsurface();
}


/*-----------------------------------------------------------------------------
 * do_freenurbsproperty
 * 
 *-----------------------------------------------------------------------------
 */

void
NurbsTessellator::do_freenurbsproperty( Property *prop )
{
	prop->deleteMe( propertyPool );
}


/*-----------------------------------------------------------------------------
 * do_setnurbsproperty -
 * 
 *-----------------------------------------------------------------------------
 */

void
NurbsTessellator::do_setnurbsproperty( Property *prop )
{
	renderhints.setProperty( prop->tag, prop->value );
	if( prop->save == 0 )
		do_freenurbsproperty( prop );
}

void
NurbsTessellator::do_setnurbsproperty2( Property *prop )
{
	Mapdesc *mapdesc = maplist.find( prop->type );

	mapdesc->setProperty( prop->tag, prop->value );
	if( prop->save == 0 )
		do_freenurbsproperty( prop );
}

void
NurbsTessellator::errorHandler( int )
{
}

void
NurbsTessellator::do_nurbserror( int msg )
{
	errorHandler( msg );
}

int 
NurbsTessellator::do_check_knots( Knotvector *knots, char *msg )
{
	int status = knots->validate();
	if( status ) {
		do_nurbserror( status );
		if( renderhints.errorchecking != N_NOMSG ) knots->show( msg );
	}
	return status;
}