pcbplot.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2018 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <[email protected]>
 * Copyright The KiCad Developers, see AUTHORS.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, see <https://www.gnu.org/licenses/>.
 */
 
#include <plotters/plotter.h>
#include <pcbplot.h>
#include <common.h>
#include <base_units.h>
#include <lset.h>
#include <locale_io.h>
#include <reporter.h>
#include <board.h>
#include <board_design_settings.h>
#include <pcb_plot_params.h>
#include <wx/ffile.h>
#include <dialog_plot.h>
#include <build_version.h>
#include <gbr_metadata.h>
#include <render_settings.h>
#include <pcb_plotter.h>
 
const wxString GetGerberProtelExtension( int aLayer )
{
    if( IsCopperLayer( aLayer ) )
    {
        if( aLayer == F_Cu )
            return wxT( "gtl" );
        else if( aLayer == B_Cu )
            return wxT( "gbl" );
        else
            return wxString( wxT( "g" ) ) << CopperLayerToOrdinal( ToLAYER_ID( aLayer ) );
    }
    else
    {
        switch( aLayer )
        {
        case B_Adhes:       return wxT( "gba" );
        case F_Adhes:       return wxT( "gta" );
 
        case B_Paste:       return wxT( "gbp" );
        case F_Paste:       return wxT( "gtp" );
 
        case B_SilkS:       return wxT( "gbo" );
        case F_SilkS:       return wxT( "gto" );
 
        case B_Mask:        return wxT( "gbs" );
        case F_Mask:        return wxT( "gts" );
 
        case Edge_Cuts:     return wxT( "gm1" );
 
        case Dwgs_User:
        case Cmts_User:
        case Eco1_User:
        case Eco2_User:
        default:            return wxT( "gbr" );
        }
    }
}
 
 
const wxString GetGerberFileFunctionAttribute( const BOARD* aBoard, int aLayer )
{
    wxString attrib;
 
 
    switch( aLayer )
    {
    case F_Adhes:
        attrib = wxT( "Glue,Top" );
        break;
 
    case B_Adhes:
        attrib = wxT( "Glue,Bot" );
        break;
 
    case F_SilkS:
        attrib = wxT( "Legend,Top" );
        break;
 
    case B_SilkS:
        attrib = wxT( "Legend,Bot" );
        break;
 
    case F_Mask:
        attrib = wxT( "Soldermask,Top" );
        break;
 
    case B_Mask:
        attrib = wxT( "Soldermask,Bot" );
        break;
 
    case F_Paste:
        attrib = wxT( "Paste,Top" );
        break;
 
    case B_Paste:
        attrib = wxT( "Paste,Bot" );
        break;
 
    case Edge_Cuts:
        // Board outline.
        // Can be "Profile,NP" (Not Plated: usual) or "Profile,P"
        // This last is the exception (Plated)
        attrib = wxT( "Profile,NP" );
        break;
 
    case Dwgs_User:
        attrib = wxT( "OtherDrawing,Comment" );
        break;
 
    case Cmts_User:
        attrib = wxT( "Other,Comment" );
        break;
 
    case Eco1_User:
        attrib = wxT( "Other,ECO1" );
        break;
 
    case Eco2_User:
        attrib = wxT( "Other,ECO2" );
        break;
 
    case B_Fab:
        // This is actually a assembly layer
        attrib = wxT( "AssemblyDrawing,Bot" );
        break;
 
    case F_Fab:
        // This is actually a assembly layer
        attrib = wxT( "AssemblyDrawing,Top" );
        break;
 
    case B_Cu:
        attrib.Printf( wxT( "Copper,L%d,Bot" ), aBoard->GetCopperLayerCount() );
        break;
 
    case F_Cu:
        attrib = wxT( "Copper,L1,Top" );
        break;
 
    default:
        if( IsCopperLayer( aLayer ) )
        {
            // aLayer use even values, and the first internal layer
            // is B_Cu + 2. And in gerber file, layer id is 2 (1 is F_Cu)
            int ly_id = ( ( aLayer - B_Cu ) / 2 ) + 1;
            attrib.Printf( wxT( "Copper,L%d,Inr" ), ly_id );
        }
        else
            attrib.Printf( wxT( "Other,User" ), aLayer+1 );
        break;
    }
 
    // This code adds a optional parameter: the type of copper layers.
    // Because it is not used by Pcbnew (it can be used only by external autorouters)
    // user do not really set this parameter.
    // Therefore do not add it.
    // However, this code is left here, for perhaps a future usage.
#if 0
    // Add the signal type of the layer, if relevant
    if( IsCopperLayer( aLayer ) )
    {
        LAYER_T type = aBoard->GetLayerType( ToLAYER_ID( aLayer ) );
 
        switch( type )
        {
        case LT_SIGNAL:
            attrib += wxT( ",Signal" );
            break;
        case LT_POWER:
            attrib += wxT( ",Plane" );
            break;
        case LT_MIXED:
            attrib += wxT( ",Mixed" );
            break;
        default:
            break;   // do nothing (but avoid a warning for unhandled LAYER_T values from GCC)
        }
    }
#endif
 
    wxString fileFct;
    fileFct.Printf( wxT( "%%TF.FileFunction,%s*%%" ), attrib );
 
    return fileFct;
}
 
 
static const wxString GetGerberFilePolarityAttribute( int aLayer )
{
    /* build the string %TF.FilePolarity,Positive*%
     * or  %TF.FilePolarity,Negative*%
     * an emply string for layers which do not use a polarity
     *
     * The value of the .FilePolarity specifies whether the image represents the
     * presence or absence of material.
     * This attribute can only be used when the file represents a pattern in a material layer,
     * e.g. copper, solder mask, legend.
     * Together with.FileFunction it defines the role of that image in
     * the layer structure of the PCB.
     * Note that the .FilePolarity attribute does not change the image -
     * no attribute does.
     * It changes the interpretation of the image.
     * For example, in a copper layer in positive polarity a round flash generates a copper pad.
     * In a copper layer in negative polarity it generates a clearance.
     * Solder mask images usually represent solder mask openings and are then negative.
     * This may be counter-intuitive.
     */
    int polarity = 0;
 
    switch( aLayer )
    {
    case F_Adhes:
    case B_Adhes:
    case F_SilkS:
    case B_SilkS:
    case F_Paste:
    case B_Paste:
        polarity = 1;
        break;
 
    case F_Mask:
    case B_Mask:
        polarity = -1;
        break;
 
    default:
        if( IsCopperLayer( aLayer ) )
            polarity = 1;
        break;
    }
 
    wxString filePolarity;
 
    if( polarity == 1 )
        filePolarity = wxT( "%TF.FilePolarity,Positive*%" );
    if( polarity == -1 )
        filePolarity = wxT( "%TF.FilePolarity,Negative*%" );
 
    return filePolarity;
}
 
 
/* Add some X2 attributes to the file header, as defined in the
 * Gerber file format specification J4 and "Revision 2015.06"
 */
 
 
// A helper function to convert a X2 attribute string to a X1 structured comment:
static wxString& makeStringCompatX1( wxString& aText, bool aUseX1CompatibilityMode )
{
    if( aUseX1CompatibilityMode )
    {
        aText.Replace( wxT( "%" ), wxEmptyString );
        aText.Prepend( wxT( "G04 #@! " ) );
    }
 
    return aText;
}
 
 
// A helper function to replace reserved chars (separators in gerber fields)
// in a gerber string field.
// reserved chars are replaced by _ (for ,) or an escaped sequence (for * and %)
static void replaceReservedCharsField( wxString& aMsg )
{
    aMsg.Replace( wxT( "," ), wxT( "_" ) );         // can be replaced by \\u002C
    aMsg.Replace( wxT( "*" ), wxT( "\\u002A" ) );
    aMsg.Replace( wxT( "%" ), wxT( "\\u0025" ) );
}
 
 
void AddGerberX2Header( PLOTTER* aPlotter, const BOARD* aBoard, bool aUseX1CompatibilityMode )
{
    wxString text;
 
    // Creates the TF,.GenerationSoftware. Format is:
    // %TF,.GenerationSoftware,<vendor>,<application name>[,<application version>]*%
    text.Printf( wxT( "%%TF.GenerationSoftware,KiCad,Pcbnew,%s*%%" ), GetBuildVersion() );
    aPlotter->AddLineToHeader( makeStringCompatX1( text, aUseX1CompatibilityMode ) );
 
    // creates the TF.CreationDate attribute:
    text = GbrMakeCreationDateAttributeString( aUseX1CompatibilityMode ? GBR_NC_STRING_FORMAT_X1
                                                                       : GBR_NC_STRING_FORMAT_X2 );
    aPlotter->AddLineToHeader( text );
 
    // Creates the TF,.ProjectId. Format is (from Gerber file format doc):
    // %TF.ProjectId,<project id>,<project GUID>,<revision id>*%
    // <project id> is the name of the project, restricted to basic ASCII symbols only,
    // Rem: <project id> accepts only ASCII 7 code (only basic ASCII codes are allowed in
    // gerber files) and comma not accepted.
    // All illegal chars will be replaced by underscore.
    //
    // <project GUID> is a string which is an unique id of a project.
    // However Kicad does not handle such a project GUID, so it is built from the board name
    wxFileName fn = aBoard->GetFileName();
    wxString msg = fn.GetFullName();
 
    // Build a <project GUID>, from the board name
    wxString guid = GbrMakeProjectGUIDfromString( msg );
 
    // build the <project id> string: this is the board short filename (without ext)
    // and all non ASCII chars and reserved chars (, * % ) are replaced by '_'
    msg = fn.GetName();
    replaceReservedCharsField( msg );
 
    // build the <revision id> string. All non ASCII chars and reserved chars are replaced by '_'
    wxString rev = ExpandTextVars( aBoard->GetTitleBlock().GetRevision(), aBoard->GetProject() );
    replaceReservedCharsField( rev );
 
    if( rev.IsEmpty() )
        rev = wxT( "rev?" );
 
    text.Printf( wxT( "%%TF.ProjectId,%s,%s,%s*%%" ), msg.ToAscii(), guid, rev.ToAscii() );
    aPlotter->AddLineToHeader( makeStringCompatX1( text, aUseX1CompatibilityMode ) );
 
    // Add the TF.SameCoordinates to specify that all gerber files uses the same origin and
    // orientation, and the registration between files is OK.
    // The parameter of TF.SameCoordinates is a string that is common to all files using the
    // same registration.  The string value has no meaning; it is just a key.
    // Because there is no mirroring/rotation in Kicad, only the plot offset origin can create
    // incorrect registration, so we create a key from plot offset options.
    //
    // Currently the key is "Original" when using absolute Pcbnew coordinates, and the PY and PY
    // position of the auxiliary axis when using it.
    // If we ever add user-settable absolute Pcbnew coordinates, we'll need to change the way
    // the key is built to ensure file only using the *same* axis have the same key.
    wxString registration_id = wxT( "Original" );
    VECTOR2I auxOrigin = aBoard->GetDesignSettings().GetAuxOrigin();
 
    if( aBoard->GetPlotOptions().GetUseAuxOrigin() && auxOrigin.x && auxOrigin.y )
        registration_id.Printf( wxT( "PX%xPY%x" ), auxOrigin.x, auxOrigin.y );
 
    text.Printf( wxT( "%%TF.SameCoordinates,%s*%%" ), registration_id.GetData() );
    aPlotter->AddLineToHeader( makeStringCompatX1( text, aUseX1CompatibilityMode ) );
}
 
 
void AddGerberX2Attribute( PLOTTER* aPlotter, const BOARD* aBoard, int aLayer,
                           bool aUseX1CompatibilityMode )
{
    AddGerberX2Header( aPlotter, aBoard, aUseX1CompatibilityMode );
 
    wxString text;
 
    // Add the TF.FileFunction
    text = GetGerberFileFunctionAttribute( aBoard, aLayer );
    aPlotter->AddLineToHeader( makeStringCompatX1( text, aUseX1CompatibilityMode ) );
 
    // Add the TF.FilePolarity (for layers which support that)
    text = GetGerberFilePolarityAttribute( aLayer );
 
    if( !text.IsEmpty() )
        aPlotter->AddLineToHeader( makeStringCompatX1( text, aUseX1CompatibilityMode ) );
}