--- /dev/null
+/*
+** 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.
+*/
+
+/*
+ * coveandtiler.c++
+ *
+ */
+
+#include "glimports.h"
+#include "myassert.h"
+#include "mystdio.h"
+#include "coveandtiler.h"
+#include "gridvertex.h"
+#include "gridtrimvertex.h"
+#include "uarray.h"
+#include "backend.h"
+
+
+const int CoveAndTiler::MAXSTRIPSIZE = 1000;
+
+CoveAndTiler::CoveAndTiler( Backend& b )
+ : backend( b )
+{ }
+
+CoveAndTiler::~CoveAndTiler( void )
+{ }
+
+inline void
+CoveAndTiler::output( GridVertex &gv )
+{
+ backend.tmeshvert( &gv );
+}
+
+inline void
+CoveAndTiler::output( TrimVertex *tv )
+{
+ backend.tmeshvert( tv );
+}
+
+inline void
+CoveAndTiler::output( GridTrimVertex& g )
+{
+ backend.tmeshvert( &g );
+}
+
+void
+CoveAndTiler::coveAndTile( void )
+{
+ long ustart = (top.ustart >= bot.ustart) ? top.ustart : bot.ustart;
+ long uend = (top.uend <= bot.uend) ? top.uend : bot.uend;
+ if( ustart <= uend ) {
+ tile( bot.vindex, ustart, uend );
+ if( top.ustart >= bot.ustart )
+ coveUpperLeft();
+ else
+ coveLowerLeft();
+
+ if( top.uend <= bot.uend )
+ coveUpperRight();
+ else
+ coveLowerRight();
+ } else {
+ TrimVertex blv, tlv, *bl, *tl;
+ GridTrimVertex bllv, tllv;
+ TrimVertex *lf = left.first();
+ TrimVertex *ll = left.last();
+ if( lf->param[0] >= ll->param[0] ) {
+ blv.param[0] = lf->param[0];
+ blv.param[1] = ll->param[1];
+ blv.nuid = 0; // XXX
+ assert( blv.param[1] == bot.vval );
+ bl = &blv;
+ tl = lf;
+ tllv.set( lf );
+ if( ll->param[0] > uarray.uarray[top.ustart-1] ) {
+ bllv.set( ll );
+ assert( ll->param[0] <= uarray.uarray[bot.ustart] );
+ } else {
+ bllv.set( top.ustart-1, bot.vindex );
+ }
+ coveUpperLeftNoGrid( bl );
+ } else {
+ tlv.param[0] = ll->param[0];
+ tlv.param[1] = lf->param[1];
+ tlv.nuid = 0; // XXX
+ assert( tlv.param[1] == top.vval );
+ tl = &tlv;
+ bl = ll;
+ bllv.set( ll );
+ if( lf->param[0] > uarray.uarray[bot.ustart-1] ) {
+ assert( lf->param[0] <= uarray.uarray[bot.ustart] );
+ tllv.set( lf );
+ } else {
+ tllv.set( bot.ustart-1, top.vindex );
+ }
+ coveLowerLeftNoGrid( tl );
+ }
+
+ TrimVertex brv, trv, *br, *tr;
+ GridTrimVertex brrv, trrv;
+ TrimVertex *rf = right.first();
+ TrimVertex *rl = right.last();
+
+ if( rf->param[0] <= rl->param[0] ) {
+ brv.param[0] = rf->param[0];
+ brv.param[1] = rl->param[1];
+ brv.nuid = 0; // XXX
+ assert( brv.param[1] == bot.vval );
+ br = &brv;
+ tr = rf;
+ trrv.set( rf );
+ if( rl->param[0] < uarray.uarray[top.uend+1] ) {
+ assert( rl->param[0] >= uarray.uarray[top.uend] );
+ brrv.set( rl );
+ } else {
+ brrv.set( top.uend+1, bot.vindex );
+ }
+ coveUpperRightNoGrid( br );
+ } else {
+ trv.param[0] = rl->param[0];
+ trv.param[1] = rf->param[1];
+ trv.nuid = 0; // XXX
+ assert( trv.param[1] == top.vval );
+ tr = &trv;
+ br = rl;
+ brrv.set( rl );
+ if( rf->param[0] < uarray.uarray[bot.uend+1] ) {
+ assert( rf->param[0] >= uarray.uarray[bot.uend] );
+ trrv.set( rf );
+ } else {
+ trrv.set( bot.uend+1, top.vindex );
+ }
+ coveLowerRightNoGrid( tr );
+ }
+
+ backend.bgntmesh( "doit" );
+ output(trrv);
+ output(tllv);
+ output( tr );
+ output( tl );
+ output( br );
+ output( bl );
+ output(brrv);
+ output(bllv);
+ backend.endtmesh();
+ }
+}
+
+void
+CoveAndTiler::tile( long vindex, long ustart, long uend )
+{
+ long numsteps = uend - ustart;
+
+ if( numsteps == 0 ) return;
+
+ if( numsteps > MAXSTRIPSIZE ) {
+ long umid = ustart + (uend - ustart) / 2;
+ tile( vindex, ustart, umid );
+ tile( vindex, umid, uend );
+ } else {
+ backend.surfmesh( ustart, vindex-1, numsteps, 1 );
+ }
+}
+
+void
+CoveAndTiler::coveUpperRight( void )
+{
+ GridVertex tgv( top.uend, top.vindex );
+ GridVertex gv( top.uend, bot.vindex );
+
+ right.first();
+ backend.bgntmesh( "coveUpperRight" );
+ output( right.next() );
+ output( tgv );
+ backend.swaptmesh();
+ output( gv );
+ coveUR();
+ backend.endtmesh();
+}
+
+void
+CoveAndTiler::coveUpperRightNoGrid( TrimVertex* br )
+{
+ backend.bgntmesh( "coveUpperRight" );
+ output( right.first() );
+ output( right.next() );
+ backend.swaptmesh();
+ output( br );
+ coveUR();
+ backend.endtmesh();
+}
+
+void
+CoveAndTiler::coveUR( )
+{
+ GridVertex gv( top.uend, bot.vindex );
+ TrimVertex *vert = right.next();
+ if( vert == NULL ) return;
+
+ assert( vert->param[0] >= uarray.uarray[gv.gparam[0]] );
+
+ if( gv.nextu() >= bot.uend ) {
+ for( ; vert; vert = right.next() ) {
+ output( vert );
+ backend.swaptmesh();
+ }
+ } else while( 1 ) {
+ if( vert->param[0] < uarray.uarray[gv.gparam[0]] ) {
+ output( vert );
+ backend.swaptmesh();
+ vert = right.next();
+ if( vert == NULL ) break;
+ } else {
+ backend.swaptmesh();
+ output( gv );
+ if( gv.nextu() == bot.uend ) {
+ for( ; vert; vert = right.next() ) {
+ output( vert );
+ backend.swaptmesh();
+ }
+ break;
+ }
+ }
+ }
+}
+
+void
+CoveAndTiler::coveUpperLeft( void )
+{
+ GridVertex tgv( top.ustart, top.vindex );
+ GridVertex gv( top.ustart, bot.vindex );
+
+ left.first();
+ backend.bgntmesh( "coveUpperLeft" );
+ output( tgv );
+ output( left.next() );
+ output( gv );
+ backend.swaptmesh();
+ coveUL();
+ backend.endtmesh();
+}
+
+void
+CoveAndTiler::coveUpperLeftNoGrid( TrimVertex* bl )
+{
+ backend.bgntmesh( "coveUpperLeftNoGrid" );
+ output( left.first() );
+ output( left.next() );
+ output( bl );
+ backend.swaptmesh();
+ coveUL();
+ backend.endtmesh();
+}
+
+void
+CoveAndTiler::coveUL()
+{
+ GridVertex gv( top.ustart, bot.vindex );
+ TrimVertex *vert = left.next();
+ if( vert == NULL ) return;
+ assert( vert->param[0] <= uarray.uarray[gv.gparam[0]] );
+
+ if( gv.prevu() <= bot.ustart ) {
+ for( ; vert; vert = left.next() ) {
+ backend.swaptmesh();
+ output( vert );
+ }
+ } else while( 1 ) {
+ if( vert->param[0] > uarray.uarray[gv.gparam[0]] ) {
+ backend.swaptmesh();
+ output( vert );
+ vert = left.next();
+ if( vert == NULL ) break;
+ } else {
+ output( gv );
+ backend.swaptmesh();
+ if( gv.prevu() == bot.ustart ) {
+ for( ; vert; vert = left.next() ) {
+ backend.swaptmesh();
+ output( vert );
+ }
+ break;
+ }
+ }
+ }
+}
+
+void
+CoveAndTiler::coveLowerLeft( void )
+{
+ GridVertex bgv( bot.ustart, bot.vindex );
+ GridVertex gv( bot.ustart, top.vindex );
+
+ left.last();
+ backend.bgntmesh( "coveLowerLeft" );
+ output( left.prev() );
+ output( bgv );
+ backend.swaptmesh();
+ output( gv );
+ coveLL();
+ backend.endtmesh();
+}
+
+void
+CoveAndTiler::coveLowerLeftNoGrid( TrimVertex* tl )
+{
+ backend.bgntmesh( "coveLowerLeft" );
+ output( left.last() );
+ output( left.prev() );
+ backend.swaptmesh();
+ output( tl );
+ coveLL( );
+ backend.endtmesh();
+}
+
+void
+CoveAndTiler::coveLL()
+{
+ GridVertex gv( bot.ustart, top.vindex );
+ TrimVertex *vert = left.prev();
+ if( vert == NULL ) return;
+ assert( vert->param[0] <= uarray.uarray[gv.gparam[0]] );
+
+ if( gv.prevu() <= top.ustart ) {
+ for( ; vert; vert = left.prev() ) {
+ output( vert );
+ backend.swaptmesh();
+ }
+ } else while( 1 ) {
+ if( vert->param[0] > uarray.uarray[gv.gparam[0]] ){
+ output( vert );
+ backend.swaptmesh();
+ vert = left.prev();
+ if( vert == NULL ) break;
+ } else {
+ backend.swaptmesh();
+ output( gv );
+ if( gv.prevu() == top.ustart ) {
+ for( ; vert; vert = left.prev() ) {
+ output( vert );
+ backend.swaptmesh();
+ }
+ break;
+ }
+ }
+ }
+}
+
+void
+CoveAndTiler::coveLowerRight( void )
+{
+ GridVertex bgv( bot.uend, bot.vindex );
+ GridVertex gv( bot.uend, top.vindex );
+
+ right.last();
+ backend.bgntmesh( "coveLowerRight" );
+ output( bgv );
+ output( right.prev() );
+ output( gv );
+ backend.swaptmesh();
+ coveLR();
+ backend.endtmesh( );
+}
+
+void
+CoveAndTiler::coveLowerRightNoGrid( TrimVertex* tr )
+{
+ backend.bgntmesh( "coveLowerRIght" );
+ output( right.last() );
+ output( right.prev() );
+ output( tr );
+ backend.swaptmesh();
+ coveLR();
+ backend.endtmesh();
+}
+
+void
+CoveAndTiler::coveLR( )
+{
+ GridVertex gv( bot.uend, top.vindex );
+ TrimVertex *vert = right.prev();
+ if( vert == NULL ) return;
+ assert( vert->param[0] >= uarray.uarray[gv.gparam[0]] );
+
+ if( gv.nextu() >= top.uend ) {
+ for( ; vert; vert = right.prev() ) {
+ backend.swaptmesh();
+ output( vert );
+ }
+ } else while( 1 ) {
+ if( vert->param[0] < uarray.uarray[gv.gparam[0]] ) {
+ backend.swaptmesh();
+ output( vert );
+ vert = right.prev();
+ if( vert == NULL ) break;
+ } else {
+ output( gv );
+ backend.swaptmesh();
+ if( gv.nextu() == top.uend ) {
+ for( ; vert; vert = right.prev() ) {
+ backend.swaptmesh();
+ output( vert );
+ }
+ break;
+ }
+ }
+ }
+}
+
projects / reactos.git / blobdiff