kicad/common/common_plotHPGL_functions.cpp

/**
 * @file common_plotHPGL_functions.cpp
 * @brief KiCad: Common plot HPGL Routines
 */

#include "fctsys.h"
#include "gr_basic.h"
#include "trigo.h"
#include "wxstruct.h"
#include "base_struct.h"
#include "plot_common.h"
#include "macros.h"
#include "kicad_string.h"

/* HPGL scale factor. */
const double SCALE_HPGL = 0.102041;


/* Set the plot offset for the current plotting
 */
void HPGL_PLOTTER::set_viewport( wxPoint aOffset, double aScale, bool aMirror )
{
    wxASSERT( !output_file );
    plot_offset  = aOffset;
    plot_scale   = aScale;
    device_scale = SCALE_HPGL;
    set_default_line_width( 100 ); /* default line width in 1 / 1000 inch */
    plotMirror = aMirror;
}


bool HPGL_PLOTTER::start_plot( FILE* fout )
{
    wxASSERT( !output_file );
    output_file = fout;
    fprintf( output_file, "IN;VS%d;PU;PA;SP%d;\n", pen_speed, pen_number );
    return true;
}


bool HPGL_PLOTTER::end_plot()
{
    wxASSERT( output_file );
    fputs( "PU;PA;SP0;\n", output_file );
    fclose( output_file );
    output_file = NULL;
    return true;
}


void HPGL_PLOTTER::rect( wxPoint p1, wxPoint p2, FILL_T fill, int width )
{
    wxASSERT( output_file );
    user_to_device_coordinates( p2 );
    move_to( p1 );
    fprintf( output_file, "EA %d,%d;\n", p2.x, p2.y );
    pen_finish();
}


void HPGL_PLOTTER::circle( wxPoint centre,
                           int     diameter,
                           FILL_T  fill,
                           int     width )
{
    wxASSERT( output_file );
    double rayon = user_to_device_size( diameter / 2 );

    if( rayon > 0 )
    {
        move_to( centre );
        fprintf( output_file, "CI %g;\n", rayon );
        pen_finish();
    }
}


/* Plot a polygon (closed if completed) in HPGL
 * aCornerList = a wxPoint list of corner
 * aFill: if != 0 filled polygon
 */
void HPGL_PLOTTER::PlotPoly( std::vector< wxPoint >& aCornerList, FILL_T aFill, int aWidth)
{
    if( aCornerList.size() <= 1 )
        return;

    move_to( aCornerList[0] );
    for( unsigned ii = 1; ii < aCornerList.size(); ii++ )
        line_to( aCornerList[ii] );

    /* Close polygon if filled. */
    if( aFill )
    {
        int ii = aCornerList.size() - 1;
        if( aCornerList[ii] != aCornerList[0] )
            line_to( aCornerList[0] );
    }
    pen_finish();
}

/*
 * Function PlotImage
 * Only Postscript plotters can plot bitmaps
 * for plotters that cannot plot a bitmap, a rectangle is plotted
 * For HPGL_PLOTTER, draws a rectangle
 * param aImage = the bitmap
 * param aPos = position of the center of the bitmap
 * param aScaleFactor = the scale factor to apply to the bitmap size
 *                      (this is not the plot scale factor)
 */
void HPGL_PLOTTER::PlotImage( wxImage & aImage, wxPoint aPos, double aScaleFactor )
{
    wxSize size;
    size.x = aImage.GetWidth();
    size.y = aImage.GetHeight();

    size.x = wxRound( size.x * aScaleFactor );
    size.y = wxRound( size.y * aScaleFactor );

    wxPoint start = aPos;
    start.x -= size.x / 2;
    start.y -= size.y / 2;

    wxPoint end = start;
    end.x += size.x;
    end.y += size.y;

    rect( start, end, NO_FILL );

}


/* Set pen up ('U') or down ('D').
 */
void HPGL_PLOTTER::pen_control( int plume )
{
    wxASSERT( output_file );
    switch( plume )
    {
    case 'U':
        if( pen_state != 'U' )
        {
            fputs( "PU;", output_file );
            pen_state = 'U';
        }
        break;

    case 'D':
        if( pen_state != 'D' )
        {
            fputs( "PD;", output_file );
            pen_state = 'D';
        }
        break;

    case 'Z':
        fputs( "PU;", output_file );
        pen_state     = 'U';
        pen_lastpos.x = -1;
        pen_lastpos.y = -1;
        break;
    }
}


/*
 * Move the pen to position with pen up or down.
 * At position x, y
 * Unit to unit DRAWING
 * If pen = 'Z' without changing pen during move.
 */
void HPGL_PLOTTER::pen_to( wxPoint pos, char plume )
{
    wxASSERT( output_file );
    if( plume == 'Z' )
    {
        pen_control( 'Z' );
        return;
    }
    pen_control( plume );
    user_to_device_coordinates( pos );

    if( pen_lastpos != pos )
        fprintf( output_file, "PA %d,%d;\n", pos.x, pos.y );
    pen_lastpos = pos;
}


void HPGL_PLOTTER::set_dash( bool dashed )
{
    wxASSERT( output_file );
    if( dashed )
        fputs( "LI 2;\n", stderr );
    else
        fputs( "LI;\n", stderr );
}


/**
 * Function Plot a filled segment (track)
 * @param start = starting point
 * @param end = ending point
 * @param width = segment width (thickness)
 * @param tracemode = FILLED, SKETCH ..
 */
void HPGL_PLOTTER::thick_segment( wxPoint start, wxPoint end, int width, EDA_DRAW_MODE_T tracemode )
{
    wxASSERT( output_file );
    wxPoint center;
    wxSize  size;

    if( (pen_diameter >= width) || (tracemode == LINE) )  /* just a line is
                                                              * Ok */
    {
        move_to( start );
        finish_to( end );
    }
    else
        segment_as_oval( start, end, width, tracemode );
}


/* Plot an arc:
 * Center = center coord
 * Stangl, endAngle = angle of beginning and end
 * Radius = radius of the arc
 * Command
 * PU PY x, y; PD start_arc_X AA, start_arc_Y, angle, NbSegm; PU;
 * Or PU PY x, y; PD start_arc_X AA, start_arc_Y, angle, PU;
 */
void HPGL_PLOTTER::arc( wxPoint centre, int StAngle, int EndAngle, int rayon,
                        FILL_T fill, int width )
{
    wxASSERT( output_file );
    wxPoint cmap;
    wxPoint cpos;
    float   angle;

    if( rayon <= 0 )
        return;

    cpos = centre;
    user_to_device_coordinates( cpos );

    if( plotMirror )
        angle = (StAngle - EndAngle) / 10.0;
    else
        angle = (EndAngle - StAngle) / 10.0;
    /* Calculate start point, */
    cmap.x = (int) ( centre.x + ( rayon * cos( StAngle * M_PI / 1800 ) ) );
    cmap.y = (int) ( centre.y - ( rayon * sin( StAngle * M_PI / 1800 ) ) );
    user_to_device_coordinates( cmap );

    fprintf( output_file,
             "PU;PA %d,%d;PD;AA %d,%d, ",
             cmap.x,
             cmap.y,
             cpos.x,
             cpos.y );
    fprintf( output_file, "%f", angle );
    fprintf( output_file, ";PU;\n" );
    pen_finish();
}


/* Plot oval pad.
 */
void HPGL_PLOTTER::flash_pad_oval( wxPoint pos, wxSize size, int orient,
                                   EDA_DRAW_MODE_T trace_mode )
{
    wxASSERT( output_file );
    int deltaxy, cx, cy;

    /* The pad is reduced to an oval with size.y > size.x
     * (Oval vertical orientation 0)
     */
    if( size.x > size.y )
    {
        EXCHG( size.x, size.y ); orient += 900;
        if( orient >= 3600 )
            orient -= 3600;
    }
    deltaxy = size.y - size.x;     /* distance between centers of the oval */

    if( trace_mode == FILLED )
    {
        flash_pad_rect( pos, wxSize( size.x, deltaxy + wxRound( pen_diameter ) ),
                        orient, trace_mode );
        cx = 0; cy = deltaxy / 2;
        RotatePoint( &cx, &cy, orient );
        flash_pad_circle( wxPoint( cx + pos.x,
                                   cy + pos.y ), size.x, trace_mode );
        cx = 0; cy = -deltaxy / 2;
        RotatePoint( &cx, &cy, orient );
        flash_pad_circle( wxPoint( cx + pos.x,
                                   cy + pos.y ), size.x, trace_mode );
    }
    else    /* Plot in SKETCH mode. */
    {
        sketch_oval( pos, size, orient, wxRound( pen_diameter ) );
    }
}


/* Plot round pad or via.
 */
void HPGL_PLOTTER::flash_pad_circle( wxPoint pos, int diametre,
                                     EDA_DRAW_MODE_T trace_mode )
{
    wxASSERT( output_file );
    int rayon, delta;

    user_to_device_coordinates( pos );

    delta = wxRound( pen_diameter - pen_overlap );
    rayon = diametre / 2;

    if( trace_mode != LINE )
    {
        rayon = ( diametre - wxRound( pen_diameter ) ) / 2;
    }

    if( rayon < 0 )
    {
        rayon = 0;
    }
    wxSize rsize( rayon, rayon );

    user_to_device_size( rsize );

    fprintf( output_file, "PA %d,%d;CI %d;\n", pos.x, pos.y, rsize.x );

    if( trace_mode == FILLED )        /* Plot in filled mode. */
    {
        if( delta > 0 )
        {
            while( (rayon -= delta ) >= 0 )
            {
                rsize.x = rsize.y = rayon;
                user_to_device_size( rsize );
                fprintf( output_file,
                         "PA %d,%d; CI %d;\n",
                         pos.x,
                         pos.y,
                         rsize.x );
            }
        }
    }
    pen_finish();
    return;
}


/*
 * Plot rectangular pad vertical or horizontal.
 * Gives its center and its dimensions X and Y
 * Units are user units
 */
void HPGL_PLOTTER::flash_pad_rect( wxPoint pos, wxSize padsize,
                                   int orient, EDA_DRAW_MODE_T trace_mode )
{
    wxASSERT( output_file );
    wxSize size;
    int    delta;
    int    ox, oy, fx, fy;

    size.x = padsize.x / 2;
    size.y = padsize.y / 2;

    if( trace_mode != LINE )
    {
        size.x = (padsize.x - (int) pen_diameter) / 2;
        size.y = (padsize.y - (int) pen_diameter) / 2;
    }

    if( size.x < 0 )
        size.x = 0;
    if( size.y < 0 )
        size.y = 0;

    /* If a dimension is zero, the trace is reduced to 1 line. */
    if( size.x == 0 )
    {
        ox = pos.x;
        oy = pos.y - size.y;
        RotatePoint( &ox, &oy, pos.x, pos.y, orient );
        fx = pos.x;
        fy = pos.y + size.y;
        RotatePoint( &fx, &fy, pos.x, pos.y, orient );
        move_to( wxPoint( ox, oy ) );
        finish_to( wxPoint( fx, fy ) );
        return;
    }
    if( size.y == 0 )
    {
        ox = pos.x - size.x;
        oy = pos.y;
        RotatePoint( &ox, &oy, pos.x, pos.y, orient );
        fx = pos.x + size.x;
        fy = pos.y;
        RotatePoint( &fx, &fy, pos.x, pos.y, orient );
        move_to( wxPoint( ox, oy ) );
        finish_to( wxPoint( fx, fy ) );
        return;
    }

    ox = pos.x - size.x;
    oy = pos.y - size.y;
    RotatePoint( &ox, &oy, pos.x, pos.y, orient );
    move_to( wxPoint( ox, oy ) );

    fx = pos.x - size.x;
    fy = pos.y + size.y;
    RotatePoint( &fx, &fy, pos.x, pos.y, orient );
    line_to( wxPoint( fx, fy ) );

    fx = pos.x + size.x;
    fy = pos.y + size.y;
    RotatePoint( &fx, &fy, pos.x, pos.y, orient );
    line_to( wxPoint( fx, fy ) );

    fx = pos.x + size.x;
    fy = pos.y - size.y;
    RotatePoint( &fx, &fy, pos.x, pos.y, orient );
    line_to( wxPoint( fx, fy ) );

    finish_to( wxPoint( ox, oy ) );

    if( trace_mode == FILLED )
    {
        /* Plot in filled mode. */
        delta = (int) (pen_diameter - pen_overlap);

        if( delta > 0 )
            while( (size.x > 0) && (size.y > 0) )
            {
                size.x -= delta;
                size.y -= delta;

                if( size.x < 0 )
                    size.x = 0;
                if( size.y < 0 )
                    size.y = 0;

                ox = pos.x - size.x;
                oy = pos.y - size.y;
                RotatePoint( &ox, &oy, pos.x, pos.y, orient );
                move_to( wxPoint( ox, oy ) );

                fx = pos.x - size.x;
                fy = pos.y + size.y;
                RotatePoint( &fx, &fy, pos.x, pos.y, orient );
                line_to( wxPoint( fx, fy ) );

                fx = pos.x + size.x;
                fy = pos.y + size.y;
                RotatePoint( &fx, &fy, pos.x, pos.y, orient );
                line_to( wxPoint( fx, fy ) );

                fx = pos.x + size.x;
                fy = pos.y - size.y;
                RotatePoint( &fx, &fy, pos.x, pos.y, orient );
                line_to( wxPoint( fx, fy ) );

                finish_to( wxPoint( ox, oy ) );
            }

    }
}


/* Plot trapezoidal pad.
 * aPadPos is pad position, aCorners the corners position of the basic shape
 * Orientation aPadOrient in 0.1 degrees
 * Plot mode FILLED or SKETCH
 */
void HPGL_PLOTTER::flash_pad_trapez( wxPoint aPadPos, wxPoint aCorners[4],
                                     int aPadOrient, EDA_DRAW_MODE_T aTrace_Mode )
{
    wxASSERT( output_file );
    wxPoint polygone[4];        // coordinates of corners relatives to the pad
    wxPoint coord[4];           // absolute coordinates of corners (coordinates in plotter space)
    int     move;

    move = wxRound( pen_diameter );

    for( int ii = 0; ii < 4; ii++ )
        polygone[ii] = aCorners[ii];

    // polygone[0] is assumed the lower left
    // polygone[1] is assumed the upper left
    // polygone[2] is assumed the upper right
    // polygone[3] is assumed the lower right

    // Plot the outline:
    for( int ii = 0; ii < 4; ii++ )
    {
        coord[ii] = polygone[ii];
        RotatePoint( &coord[ii], aPadOrient );
        coord[ii] += aPadPos;
    }
    move_to( coord[0] );
    line_to( coord[1] );
    line_to( coord[2] );
    line_to( coord[3] );
    finish_to( coord[0] );

    // Fill shape:
    if( aTrace_Mode == FILLED )
    {
        // TODO: replace this par the HPGL plot polygon.
        int jj;
        /* Fill the shape */
        move = wxRound( pen_diameter - pen_overlap );
        /* Calculate fill height. */

        if( polygone[0].y == polygone[3].y ) /* Horizontal */
        {
            jj = polygone[3].y - (int) ( pen_diameter + ( 2 * pen_overlap ) );
        }
        else    // vertical
        {
            jj = polygone[3].x - (int) ( pen_diameter + ( 2 * pen_overlap ) );
        }

        /* Calculation of dd = number of segments was traced to fill. */
        jj = jj / (int) ( pen_diameter - pen_overlap );

        /* Trace the outline. */
        for( ; jj > 0; jj-- )
        {
            polygone[0].x += move;
            polygone[0].y -= move;
            polygone[1].x += move;
            polygone[1].y += move;
            polygone[2].x -= move;
            polygone[2].y += move;
            polygone[3].x -= move;
            polygone[3].y -= move;

            /* Test for crossed vertexes. */
            if( polygone[0].x > polygone[3].x ) /* X axis intersection on
                                                 *vertexes 0 and 3 */
            {
                polygone[0].x = polygone[3].x = 0;
            }
            if( polygone[1].x > polygone[2].x ) /*  X axis intersection on
                                                 *vertexes 1 and 2 */
            {
                polygone[1].x = polygone[2].x = 0;
            }
            if( polygone[1].y > polygone[0].y ) /* Y axis intersection on
                                                 *vertexes 0 and 1 */
            {
                polygone[0].y = polygone[1].y = 0;
            }
            if( polygone[2].y > polygone[3].y ) /* Y axis intersection on
                                                 *vertexes 2 and 3 */
            {
                polygone[2].y = polygone[3].y = 0;
            }

            for( int ii = 0; ii < 4; ii++ )
            {
                coord[ii] = polygone[ii];
                RotatePoint( &coord[ii], aPadOrient );
                coord[ii] += aPadPos;
            }

            move_to( coord[0] );
            line_to( coord[1] );
            line_to( coord[2] );
            line_to( coord[3] );
            finish_to( coord[0] );
        }
    }
}