readgerb.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2007-2016 Jean-Pierre Charras jp.charras at wanadoo.fr
 * Copyright (C) 1992-2016 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, 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
 */
 
#include "ki_exception.h"
#include <string_utils.h>
#include <locale_io.h>
#include <gerbview.h>
#include <gerbview_frame.h>
#include <gerber_file_image.h>
#include <gerber_file_image_list.h>
#include <richio.h>
#include <view/view.h>
 
#include <dialogs/html_message_box.h>
#include <macros.h>
 
#include <wx/msgdlg.h>
 
/* Read a gerber file, RS274D, RS274X or RS274X2 format.
 */
bool GERBVIEW_FRAME::Read_GERBER_File( const wxString& GERBER_FullFileName )
{
 wxString msg;
 
 int layer = GetActiveLayer();
 GERBER_FILE_IMAGE_LIST* images = GetImagesList();
 GERBER_FILE_IMAGE* gerber = GetGbrImage( layer );
 
 if( gerber != nullptr )
 {
 Erase_Current_DrawLayer( false );
 }
 
 // use an unique ptr while we load to free on exception properly
 std::unique_ptr<GERBER_FILE_IMAGE> gerber_uptr = std::make_unique<GERBER_FILE_IMAGE>( layer );
 
 // Read the gerber file. The image will be added only if it can be read
 // to avoid broken data.
 bool success = gerber_uptr->LoadGerberFile( GERBER_FullFileName );
 
 if( !success )
 {
 gerber_uptr.reset();
 msg.Printf( _( "File '%s' not found" ), GERBER_FullFileName );
 ShowInfoBarError( msg );
 return false;
 }
 
 gerber = gerber_uptr.release();
 wxASSERT( gerber != nullptr );
 images->AddGbrImage( gerber, layer );
 
 // Display errors list
 if( gerber->GetMessages().size() > 0 )
 {
 HTML_MESSAGE_BOX dlg( this, _( "Errors" ) );
 dlg.ListSet( gerber->GetMessages() );
 dlg.ShowModal();
 }
 
 /* if the gerber file has items using D codes but missing D codes definitions,
 * it can be a deprecated RS274D file (i.e. without any aperture information),
 * or has missing definitions,
 * warn the user:
 */
 if( gerber->GetItemsCount() && gerber->m_Has_MissingDCode )
 {
 if( !gerber->m_Has_DCode )
 msg = _("Warning: this file has no D-Code definition\n"
 "Therefore the size of some items is undefined");
 else
 msg = _("Warning: this file has some missing D-Code definitions\n"
 "Therefore the size of some items is undefined");
 
 wxMessageBox( msg );
 }
 
 if( GetCanvas() )
 {
 if( gerber->m_ImageNegative )
 {
 // TODO: find a way to handle negative images
 // (maybe convert geometry into positives?)
 }
 
 for( GERBER_DRAW_ITEM* item : gerber->GetItems() )
 GetCanvas()->GetView()->Add( (KIGFX::VIEW_ITEM*) item );
 }
 
 return true;
}
 
 
/*
 * Original function derived from gerber_is_rs274x_p() of gerbv 2.7.0.
 * Copyright of the source file readgerb.cpp included below:
 */
/* gEDA - GNU Electronic Design Automation
 * This is a part of gerbv
 *
 * Copyright (C) 2000-2003 Stefan Petersen ([email protected])
 *
 * $Id$
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
 */
bool GERBER_FILE_IMAGE::TestFileIsRS274( const wxString& aFullFileName )
{
 char* letter = nullptr;
 bool foundADD = false;
 bool foundD0 = false;
 bool foundD2 = false;
 bool foundM0 = false;
 bool foundM2 = false;
 bool foundStar = false;
 bool foundX = false;
 bool foundY = false;
 
 try
 {
 FILE_LINE_READER gerberReader( aFullFileName );
 
 while( gerberReader.ReadLine() )
 {
 // Remove all whitespace from the beginning and end
 char* line = StrPurge( gerberReader.Line() );
 
 // Skip empty lines
 if( *line == 0 )
 continue;
 
 // Check that file is not binary (non-printing chars)
 for( size_t i = 0; i < strlen( line ); i++ )
 {
 if( !isascii( line[i] ) )
 return false;
 }
 
 if( strstr( line, "%ADD" ) )
 foundADD = true;
 
 if( strstr( line, "D00" ) || strstr( line, "D0" ) )
 foundD0 = true;
 
 if( strstr( line, "D02" ) || strstr( line, "D2" ) )
 foundD2 = true;
 
 if( strstr( line, "M00" ) || strstr( line, "M0" ) )
 foundM0 = true;
 
 if( strstr( line, "M02" ) || strstr( line, "M2" ) )
 foundM2 = true;
 
 if( strstr( line, "*" ) )
 foundStar = true;
 
 /* look for X<number> or Y<number> */
 if( ( letter = strstr( line, "X" ) ) != nullptr )
 {
 if( isdigit( letter[1] ) )
 foundX = true;
 }
 
 if( ( letter = strstr( line, "Y" ) ) != nullptr )
 {
 if( isdigit( letter[1] ) )
 foundY = true;
 }
 }
 }
 catch( IO_ERROR& )
 {
 return false;
 }
 
 // RS-274X
 if( ( foundD0 || foundD2 || foundM0 || foundM2 ) && foundADD && foundStar
 && ( foundX || foundY ) )
 {
 return true;
 }
 // RS-274D. Could be folded into the expression above, but someday
 // we might want to test for them separately.
 else if( ( foundD0 || foundD2 || foundM0 || foundM2 ) && !foundADD && foundStar
 && ( foundX || foundY ) )
 {
 return true;
 }
 
 
 return false;
}
 
// size of a single line of text from a gerber file.
// warning: some files can have *very long* lines, so the buffer must be large.
#define GERBER_BUFZ 1000000
// A large buffer to store one line
static char lineBuffer[GERBER_BUFZ+1];
 
bool GERBER_FILE_IMAGE::LoadGerberFile( const wxString& aFullFileName )
{
 int G_command = 0; // command number for G commands like G04
 int D_commande = 0; // command number for D commands like D02
 char* text;
 
 ClearMessageList( );
 ResetDefaultValues();
 
 // Read the gerber file */
 m_Current_File = wxFopen( aFullFileName, wxT( "rt" ) );
 
 if( m_Current_File == nullptr )
 return false;
 
 m_FileName = aFullFileName;
 
 LOCALE_IO toggleIo;
 
 wxString msg;
 
 while( true )
 {
 if( fgets( lineBuffer, GERBER_BUFZ, m_Current_File ) == nullptr )
 break;
 
 m_LineNum++;
 text = StrPurge( lineBuffer );
 
 while( text && *text )
 {
 switch( *text )
 {
 case ' ':
 case '\r':
 case '\n':
 text++;
 break;
 
 case '*': // End command
 m_CommandState = END_BLOCK;
 text++;
 break;
 
 case 'M': // End file
 m_CommandState = CMD_IDLE;
 while( *text )
 text++;
 break;
 
 case 'G': /* Line type Gxx : command */
 G_command = CodeNumber( text );
 Execute_G_Command( text, G_command );
 break;
 
 case 'D': /* Line type Dxx : Tool selection (xx > 0) or
 * command if xx = 0..9 */
 D_commande = CodeNumber( text );
 Execute_DCODE_Command( text, D_commande );
 break;
 
 case 'X':
 case 'Y': /* Move or draw command */
 m_CurrentPos = ReadXYCoord( text );
 if( *text == '*' ) // command like X12550Y19250*
 {
 Execute_DCODE_Command( text, m_Last_Pen_Command );
 }
 break;
 
 case 'I':
 case 'J': /* Auxiliary Move command */
 m_IJPos = ReadIJCoord( text );
 
 if( *text == '*' ) // command like X35142Y15945J504*
 {
 Execute_DCODE_Command( text, m_Last_Pen_Command );
 }
 break;
 
 case '%':
 if( m_CommandState != ENTER_RS274X_CMD )
 {
 m_CommandState = ENTER_RS274X_CMD;
 ReadRS274XCommand( lineBuffer, GERBER_BUFZ, text );
 }
 else //Error
 {
 AddMessageToList( wxT( "Expected RS274X Command" ) );
 m_CommandState = CMD_IDLE;
 text++;
 }
 break;
 
 default:
 msg.Printf( wxT( "Unexpected char 0x%2.2X" ), *text );
 AddMessageToList( msg );
 text++;
 break;
 }
 }
 }
 
 fclose( m_Current_File );
 
 m_InUse = true;
 
 return true;
}