kicad/pcbnew/autorouter/routing_matrix.cpp

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2012 Jean-Pierre Charras, jean-pierre.charras@ujf-grenoble.fr
 * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
 * Copyright (C) 2011 Wayne Stambaugh <stambaughw@verizon.net>
 *
 * Copyright (C) 1992-2012 KiCad Developers, see change_log.txt for contributors.
 *
 * 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, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

/**
 * @file routing_matrix.cpp
 * @brief Functions to create autorouting maps
 */

#include <fctsys.h>
#include <common.h>
#include <pcbcommon.h>

#include <pcbnew.h>
#include <cell.h>
#include <autorout.h>

#include <class_board.h>
#include <class_module.h>
#include <class_track.h>
#include <class_drawsegment.h>
#include <class_edge_mod.h>
#include <class_pcb_text.h>


MATRIX_ROUTING_HEAD::MATRIX_ROUTING_HEAD()
{
    m_BoardSide[0]   = m_BoardSide[1] = NULL;
    m_DistSide[0]    = m_DistSide[1] = NULL;
    m_DirSide[0]     = m_DirSide[1] = NULL;
    m_InitMatrixDone = false;
    m_Nrows   = m_Ncols = 0;
    m_MemSize = 0;
    m_RoutingLayersCount = 1;
}


MATRIX_ROUTING_HEAD::~MATRIX_ROUTING_HEAD()
{
}


bool MATRIX_ROUTING_HEAD::ComputeMatrixSize( BOARD* aPcb, bool aUseBoardEdgesOnly )
{
    aPcb->ComputeBoundingBox( aUseBoardEdgesOnly );

    // The boundary box must have its start point on routing grid:
    m_BrdBox = aPcb->GetBoundingBox();

    m_BrdBox.SetX( m_BrdBox.GetX() - ( m_BrdBox.GetX() % m_GridRouting ) );
    m_BrdBox.SetY( m_BrdBox.GetY() - ( m_BrdBox.GetY() % m_GridRouting ) );

    // The boundary box must have its end point on routing grid:
    wxPoint end = m_BrdBox.GetEnd();

    end.x -= end.x % m_GridRouting;
    end.x += m_GridRouting;

    end.y -= end.y % m_GridRouting;
    end.y += m_GridRouting;

    m_BrdBox.SetEnd( end );

    aPcb->SetBoundingBox( m_BrdBox );

    m_Nrows = m_BrdBox.GetHeight() / m_GridRouting;
    m_Ncols = m_BrdBox.GetWidth() / m_GridRouting;

    // gives a small margin
    m_Ncols += 1;
    m_Nrows += 1;

    return true;
}



int MATRIX_ROUTING_HEAD::InitRoutingMatrix()
{
    if( m_Nrows <= 0 || m_Ncols <= 0 )
        return 0;

    m_InitMatrixDone = true;     // we have been called

    // give a small margin for memory allocation:
    int ii = (RoutingMatrix.m_Nrows + 1) * (RoutingMatrix.m_Ncols + 1);

    int side = BOTTOM;
    for( int jj = 0; jj < m_RoutingLayersCount; jj++ )  // m_RoutingLayersCount = 1 or 2
    {
        m_BoardSide[side] = NULL;
        m_DistSide[side]  = NULL;
        m_DirSide[side]   = NULL;

        /* allocate matrix & initialize everything to empty */
        m_BoardSide[side] = (MATRIX_CELL*) operator new( ii * sizeof(MATRIX_CELL) );
        memset( m_BoardSide[side], 0, ii * sizeof(MATRIX_CELL) );

        if( m_BoardSide[side] == NULL )
            return -1;

        // allocate Distances
        m_DistSide[side] = (DIST_CELL*) operator new( ii * sizeof(DIST_CELL) );
        memset( m_DistSide[side], 0, ii * sizeof(DIST_CELL) );

        if( m_DistSide[side] == NULL )
            return -1;

        // allocate Dir (chars)
        m_DirSide[side] = (char*) operator new( ii );
        memset( m_DirSide[side], 0, ii );

        if( m_DirSide[side] == NULL )
            return -1;

        side = TOP;
    }

    m_MemSize = m_RouteCount * ii * ( sizeof(MATRIX_CELL)
                + sizeof(DIST_CELL) + sizeof(char) );

    return m_MemSize;
}


void MATRIX_ROUTING_HEAD::UnInitRoutingMatrix()
{
    int ii;

    m_InitMatrixDone = false;

    for( ii = 0; ii < MAX_ROUTING_LAYERS_COUNT; ii++ )
    {
        // de-allocate Dir matrix
        if( m_DirSide[ii] )
        {
            delete m_DirSide[ii];
            m_DirSide[ii] = NULL;
        }

        // de-allocate Distances matrix
        if( m_DistSide[ii] )
        {
            delete m_DistSide[ii];
            m_DistSide[ii] = NULL;
        }

        // de-allocate cells matrix
        if( m_BoardSide[ii] )
        {
            delete m_BoardSide[ii];
            m_BoardSide[ii] = NULL;
        }
    }

    m_Nrows = m_Ncols = 0;
}


/**
 * Function PlaceCells
 * Initialize the matrix routing by setting obstacles for each occupied cell
 * a cell set to HOLE is an obstacle for tracks and vias
 * a cell set to VIA_IMPOSSIBLE is an obstacle for vias only.
 * a cell set to CELL_is_EDGE is a frontier.
 * Tracks and vias having the same net code as net_code are skipped
 * (htey do not are obstacles)
 *
 * For single-sided Routing 1:
 * BOTTOM side is used, and Route_Layer_BOTTOM = Route_Layer_TOP
 *
 * If flag == FORCE_PADS: all pads will be put in matrix as obstacles.
 */
void PlaceCells( BOARD* aPcb, int net_code, int flag )
{
    int       ux0 = 0, uy0 = 0, ux1, uy1, dx, dy;
    int       marge, via_marge;
    LAYER_MSK layerMask;

    // use the default NETCLASS?
    NETCLASS* nc = aPcb->m_NetClasses.GetDefault();

    int       trackWidth = nc->GetTrackWidth();
    int       clearance  = nc->GetClearance();
    int       viaSize    = nc->GetViaDiameter();

    marge     = clearance + (trackWidth / 2);
    via_marge = clearance + (viaSize / 2);

    // Place PADS on matrix routing:
    for( unsigned i = 0; i < aPcb->GetPadCount(); ++i )
    {
        D_PAD* pad = aPcb->GetPad( i );

        if( net_code != pad->GetNetCode() || (flag & FORCE_PADS) )
        {
            ::PlacePad( pad, HOLE, marge, WRITE_CELL );
        }

        ::PlacePad( pad, VIA_IMPOSSIBLE, via_marge, WRITE_OR_CELL );
    }

    // Place outlines of modules on matrix routing, if they are on a copper layer
    // or on the edge layer

    for( MODULE* module = aPcb->m_Modules; module; module = module->Next() )
    {
        for( BOARD_ITEM* item = module->GraphicalItems(); item; item = item->Next() )
        {
            switch( item->Type() )
            {
            case PCB_MODULE_EDGE_T:
            {
                EDGE_MODULE* edge = (EDGE_MODULE*) item;
                EDGE_MODULE tmpEdge( *edge );

                if( tmpEdge.GetLayer() == EDGE_N )
                    tmpEdge.SetLayer( UNDEFINED_LAYER );

                TraceSegmentPcb( &tmpEdge, HOLE, marge, WRITE_CELL );
                TraceSegmentPcb( &tmpEdge, VIA_IMPOSSIBLE, via_marge, WRITE_OR_CELL );
            }
            break;

            default:
                break;
            }
        }
    }

    // Place board outlines and texts on copper layers:
    for( BOARD_ITEM* item = aPcb->m_Drawings; item; item = item->Next() )
    {
        switch( item->Type() )
        {
        case PCB_LINE_T:
        {
            DRAWSEGMENT* DrawSegm;

            int          type_cell = HOLE;
            DrawSegm = (DRAWSEGMENT*) item;
            DRAWSEGMENT tmpSegm( DrawSegm );

            if( DrawSegm->GetLayer() == EDGE_N )
            {
                tmpSegm.SetLayer( UNDEFINED_LAYER );
                type_cell |= CELL_is_EDGE;
            }

            TraceSegmentPcb( &tmpSegm, type_cell, marge, WRITE_CELL );
        }
        break;

        case PCB_TEXT_T:
        {
            TEXTE_PCB* PtText;
            PtText = (TEXTE_PCB*) item;

            if( PtText->GetText().Length() == 0 )
                break;

            EDA_RECT textbox = PtText->GetTextBox( -1 );
            ux0 = textbox.GetX();
            uy0 = textbox.GetY();
            dx  = textbox.GetWidth();
            dy  = textbox.GetHeight();

            /* Put bounding box (rectangle) on matrix */
            dx /= 2;
            dy /= 2;

            ux1 = ux0 + dx;
            uy1 = uy0 + dy;

            ux0 -= dx;
            uy0 -= dy;

            layerMask = GetLayerMask( PtText->GetLayer() );

            TraceFilledRectangle( ux0 - marge, uy0 - marge, ux1 + marge,
                                  uy1 + marge, PtText->GetOrientation(),
                                  layerMask, HOLE, WRITE_CELL );

            TraceFilledRectangle( ux0 - via_marge, uy0 - via_marge,
                                  ux1 + via_marge, uy1 + via_marge,
                                  PtText->GetOrientation(),
                                  layerMask, VIA_IMPOSSIBLE, WRITE_OR_CELL );
        }
        break;

        default:
            break;
        }
    }

    /* Put tracks and vias on matrix */
    for( TRACK* track = aPcb->m_Track; track; track = track->Next() )
    {
        if( net_code == track->GetNetCode() )
            continue;

        TraceSegmentPcb( track, HOLE, marge, WRITE_CELL );
        TraceSegmentPcb( track, VIA_IMPOSSIBLE, via_marge, WRITE_OR_CELL );
    }
}


int Build_Work( BOARD* Pcb )
{
    RATSNEST_ITEM*  pt_rats;
    D_PAD*          pt_pad;
    int             r1, r2, c1, c2, current_net_code;
    RATSNEST_ITEM*  pt_ch;
    int             demi_pas = RoutingMatrix.m_GridRouting / 2;
    wxString        msg;

    InitWork(); /* clear work list */
    int cellCount = 0;

    for( unsigned ii = 0; ii < Pcb->GetRatsnestsCount(); ii++ )
    {
        pt_rats = &Pcb->m_FullRatsnest[ii];

        /* We consider here only ratsnest that are active ( obviously not yet routed)
         * and routables (that are not yet attempt to be routed and fail
         */
        if( (pt_rats->m_Status & CH_ACTIF) == 0 )
            continue;

        if( pt_rats->m_Status & CH_UNROUTABLE )
            continue;

        if( (pt_rats->m_Status & CH_ROUTE_REQ) == 0 )
            continue;

        pt_pad = pt_rats->m_PadStart;

        current_net_code = pt_pad->GetNetCode();
        pt_ch = pt_rats;

        r1 = ( pt_pad->GetPosition().y - RoutingMatrix.m_BrdBox.GetY() + demi_pas )
            / RoutingMatrix.m_GridRouting;

        if( r1 < 0 || r1 >= RoutingMatrix.m_Nrows )
        {
            msg.Printf( wxT( "error : row = %d ( padY %d pcbY %d) " ), r1,
                        pt_pad->GetPosition().y, RoutingMatrix.m_BrdBox.GetY() );
            wxMessageBox( msg );
            return 0;
        }

        c1 = ( pt_pad->GetPosition().x - RoutingMatrix.m_BrdBox.GetX() + demi_pas ) / RoutingMatrix.m_GridRouting;

        if( c1 < 0 || c1 >= RoutingMatrix.m_Ncols )
        {
            msg.Printf( wxT( "error : col = %d ( padX %d pcbX %d) " ), c1,
                        pt_pad->GetPosition().x, RoutingMatrix.m_BrdBox.GetX() );
            wxMessageBox( msg );
            return 0;
        }

        pt_pad = pt_rats->m_PadEnd;

        r2 = ( pt_pad->GetPosition().y - RoutingMatrix.m_BrdBox.GetY()
               + demi_pas ) / RoutingMatrix.m_GridRouting;

        if( r2 < 0 || r2 >= RoutingMatrix.m_Nrows )
        {
            msg.Printf( wxT( "error : row = %d ( padY %d pcbY %d) " ), r2,
                        pt_pad->GetPosition().y, RoutingMatrix.m_BrdBox.GetY() );
            wxMessageBox( msg );
            return 0;
        }

        c2 = ( pt_pad->GetPosition().x - RoutingMatrix.m_BrdBox.GetX() + demi_pas )
             / RoutingMatrix.m_GridRouting;

        if( c2 < 0 || c2 >= RoutingMatrix.m_Ncols )
        {
            msg.Printf( wxT( "error : col = %d ( padX %d pcbX %d) " ), c2,
                        pt_pad->GetPosition().x, RoutingMatrix.m_BrdBox.GetX() );
            wxMessageBox( msg );
            return 0;
        }

        SetWork( r1, c1, current_net_code, r2, c2, pt_ch, 0 );
        cellCount++;
    }

    SortWork();
    return cellCount;
}

// Initialize m_opWriteCell member to make the aLogicOp
void MATRIX_ROUTING_HEAD::SetCellOperation( int aLogicOp )
{
    switch( aLogicOp )
    {
    default:
    case WRITE_CELL:
        m_opWriteCell = &MATRIX_ROUTING_HEAD::SetCell;
        break;

    case WRITE_OR_CELL:
        m_opWriteCell = &MATRIX_ROUTING_HEAD::OrCell;
        break;

    case WRITE_XOR_CELL:
        m_opWriteCell = &MATRIX_ROUTING_HEAD::XorCell;
        break;

    case WRITE_AND_CELL:
        m_opWriteCell = &MATRIX_ROUTING_HEAD::AndCell;
        break;

    case WRITE_ADD_CELL:
        m_opWriteCell = &MATRIX_ROUTING_HEAD::AddCell;
        break;
    }
}


/* return the value stored in a cell
 */
MATRIX_CELL MATRIX_ROUTING_HEAD::GetCell( int aRow, int aCol, int aSide )
{
    MATRIX_CELL* p;

    p = RoutingMatrix.m_BoardSide[aSide];
    return p[aRow * m_Ncols + aCol];
}


/* basic cell operation : WRITE operation
 */
void MATRIX_ROUTING_HEAD::SetCell( int aRow, int aCol, int aSide, MATRIX_CELL x )
{
    MATRIX_CELL* p;

    p = RoutingMatrix.m_BoardSide[aSide];
    p[aRow * m_Ncols + aCol] = x;
}


/* basic cell operation : OR operation
 */
void MATRIX_ROUTING_HEAD::OrCell( int aRow, int aCol, int aSide, MATRIX_CELL x )
{
    MATRIX_CELL* p;

    p = RoutingMatrix.m_BoardSide[aSide];
    p[aRow * m_Ncols + aCol] |= x;
}


/* basic cell operation : XOR operation
 */
void MATRIX_ROUTING_HEAD::XorCell( int aRow, int aCol, int aSide, MATRIX_CELL x )
{
    MATRIX_CELL* p;

    p = RoutingMatrix.m_BoardSide[aSide];
    p[aRow * m_Ncols + aCol] ^= x;
}


/* basic cell operation : AND operation
 */
void MATRIX_ROUTING_HEAD::AndCell( int aRow, int aCol, int aSide, MATRIX_CELL x )
{
    MATRIX_CELL* p;

    p = RoutingMatrix.m_BoardSide[aSide];
    p[aRow * m_Ncols + aCol] &= x;
}


/* basic cell operation : ADD operation
 */
void MATRIX_ROUTING_HEAD::AddCell( int aRow, int aCol, int aSide, MATRIX_CELL x )
{
    MATRIX_CELL* p;

    p = RoutingMatrix.m_BoardSide[aSide];
    p[aRow * m_Ncols + aCol] += x;
}


/* fetch distance cell */
DIST_CELL MATRIX_ROUTING_HEAD::GetDist( int aRow, int aCol, int aSide ) /* fetch distance cell */
{
    DIST_CELL* p;

    p = RoutingMatrix.m_DistSide[aSide];
    return p[aRow * m_Ncols + aCol];
}


/* store distance cell */
void MATRIX_ROUTING_HEAD::SetDist( int aRow, int aCol, int aSide, DIST_CELL x )
{
    DIST_CELL* p;

    p = RoutingMatrix.m_DistSide[aSide];
    p[aRow * m_Ncols + aCol] = x;
}


/* fetch direction cell */
int MATRIX_ROUTING_HEAD::GetDir( int aRow, int aCol, int aSide )
{
    DIR_CELL* p;

    p = RoutingMatrix.m_DirSide[aSide];
    return (int) (p[aRow * m_Ncols + aCol]);
}


/* store direction cell */
void MATRIX_ROUTING_HEAD::SetDir( int aRow, int aCol, int aSide, int x )
{
    DIR_CELL* p;

    p = RoutingMatrix.m_DirSide[aSide];
    p[aRow * m_Ncols + aCol] = (char) x;
}