Gerbview: Add support for recent File Format Attribute metadata, both for X2 Gerber file format and X1 (R274X) format.

Pcbnew already uses this attribute when creating Gerber files.
Because Gerber files using this attribute identify the board layers stackup, Gerbview (if this attribute is defined) can sort gerber images stach up like the board.
(in layer manager, just right click to access to the sort menu)

gerbview/CMakeLists.txt

@@ -40,6 +40,7 @@ set( GERBVIEW_SRCS
     class_gerber_draw_item.cpp
     class_gerbview_layer_widget.cpp
     class_gbr_layer_box_selector.cpp
+    class_X2_gerber_attributes.cpp
     controle.cpp
     dcode.cpp
     draw_gerber_screen.cpp

gerbview/class_GERBER.cpp

@@ -36,6 +36,9 @@
 #include <gerbview.h>
 #include <gerbview_frame.h>
 #include <class_GERBER.h>
+#include <class_X2_gerber_attributes.h>
+
+#include <algorithm>
 
 
 /**
@@ -88,9 +91,10 @@ void GERBER_LAYER::ResetDefaultValues()
 GERBER_IMAGE::GERBER_IMAGE( GERBVIEW_FRAME* aParent, int aLayer )
 {
     m_Parent = aParent;
-    m_GraphicLayer = aLayer;  // Graphic layer Number
+    m_GraphicLayer = aLayer;        // Graphic layer Number
 
     m_Selected_Tool = FIRST_DCODE;
+    m_FileFunction = NULL;          // file function parameters
 
     ResetDefaultValues();
 
@@ -104,9 +108,9 @@ GERBER_IMAGE::~GERBER_IMAGE()
     for( unsigned ii = 0; ii < DIM( m_Aperture_List ); ii++ )
     {
         delete m_Aperture_List[ii];
-
-        // m_Aperture_List[ii] = NULL;
     }
+
+    delete m_FileFunction;
 }
 
 /*
@@ -158,6 +162,11 @@ void GERBER_IMAGE::ResetDefaultValues()
     m_FileName.Empty();
     m_ImageName     = wxT( "no name" );             // Image name from the IN command
     m_ImageNegative = false;                        // true = Negative image
+    m_IsX2_file     = false;                        // true only if a %TF, %TA or %TD command
+    delete m_FileFunction;                          // file function parameters
+    m_FileFunction = NULL;
+    m_MD5_value.Empty();                            // MD5 value found in a %TF.MD5 command
+    m_PartString.Empty();                           // string found in a %TF.Part command
     m_hasNegativeItems    = -1;                     // set to uninitialized
     m_ImageJustifyOffset  = wxPoint(0,0);           // Image justify Offset
     m_ImageJustifyXCenter = false;                  // Image Justify Center on X axis (default = false)
@@ -361,3 +370,171 @@ void GERBER_IMAGE::DisplayImageInfo( void )
     m_Parent->AppendMsgPanel( _( "Image Justify Offset" ), msg, DARKRED );
 }
 
+// GERBER_IMAGE_LIST is a helper class to handle a list of GERBER_IMAGE files
+GERBER_IMAGE_LIST::GERBER_IMAGE_LIST()
+{
+    m_GERBER_List.reserve( GERBER_DRAWLAYERS_COUNT );
+
+    for( unsigned layer = 0; layer < GERBER_DRAWLAYERS_COUNT; ++layer )
+        m_GERBER_List.push_back( NULL );
+}
+
+GERBER_IMAGE_LIST::~GERBER_IMAGE_LIST()
+{
+    ClearList();
+
+    for( unsigned layer = 0; layer < m_GERBER_List.size(); ++layer )
+    {
+        delete m_GERBER_List[layer];
+        m_GERBER_List[layer] = NULL;
+    }
+}
+
+GERBER_IMAGE* GERBER_IMAGE_LIST::GetGbrImage( int aIdx )
+{
+    if( (unsigned)aIdx < m_GERBER_List.size() )
+        return m_GERBER_List[aIdx];
+
+    return NULL;
+}
+
+/**
+ * creates a new, empty GERBER_IMAGE* at index aIdx
+ * or at the first free location if aIdx < 0
+ * @param aIdx = the location to use ( 0 ... GERBER_DRAWLAYERS_COUNT-1 )
+ * @return true if the index used, or -1 if no room to add image
+ */
+int GERBER_IMAGE_LIST::AddGbrImage( GERBER_IMAGE* aGbrImage, int aIdx )
+{
+    int idx = aIdx;
+
+    if( idx < 0 )
+    {
+        for( idx = 0; idx < (int)m_GERBER_List.size(); idx++ )
+        {
+            if( !IsUsed( idx ) )
+                break;
+        }
+    }
+
+    if( idx >= (int)m_GERBER_List.size() )
+        return -1;  // No room
+
+    m_GERBER_List[idx] = aGbrImage;
+
+    return idx;
+}
+
+
+// remove all loaded data in list, but do not delete empty images
+// (can be reused)
+void GERBER_IMAGE_LIST::ClearList()
+{
+    for( unsigned layer = 0; layer < m_GERBER_List.size(); ++layer )
+        ClearImage( layer );
+}
+
+// remove the loaded data of image aIdx, but do not delete it
+void GERBER_IMAGE_LIST::ClearImage( int aIdx )
+{
+    if( aIdx >= 0 && aIdx < (int)m_GERBER_List.size() && m_GERBER_List[aIdx] )
+    {
+        m_GERBER_List[aIdx]->InitToolTable();
+        m_GERBER_List[aIdx]->ResetDefaultValues();
+        m_GERBER_List[aIdx]->m_InUse = false;
+    }
+}
+
+// Build a name for image aIdx which can be used in layers manager
+const wxString GERBER_IMAGE_LIST::GetDisplayName( int aIdx )
+{
+    wxString name;
+
+    GERBER_IMAGE* gerber = NULL;
+
+    if( aIdx >= 0 && aIdx < (int)m_GERBER_List.size() )
+        gerber = m_GERBER_List[aIdx];
+
+    if( gerber && gerber->m_InUse)
+    {
+        if( gerber->m_FileFunction )
+            name.Printf( _( "Layer %d (%s, %s)" ), aIdx + 1,
+                         GetChars( gerber->m_FileFunction->GetFileType() ),
+                         GetChars( gerber->m_FileFunction->GetBrdLayerId() ) );
+        else
+            name.Printf( _( "Layer %d *" ), aIdx + 1 );
+    }
+    else
+        name.Printf( _( "Layer %d" ), aIdx + 1 );
+
+    return name;
+}
+
+// return true if image is used (loaded and not cleared)
+bool GERBER_IMAGE_LIST::IsUsed( int aIdx )
+{
+    if( aIdx >= 0 && aIdx < (int)m_GERBER_List.size() )
+        return m_GERBER_List[aIdx] != NULL && m_GERBER_List[aIdx]->m_InUse;
+
+    return false;
+}
+
+// Helper function, for std::sort.
+// Sort loaded images by Z order priority, if they have the X2 FileFormat info
+// returns true if the first argument (ref) is ordered before the second (test).
+static bool sortZorder( const GERBER_IMAGE* const& ref, const GERBER_IMAGE* const& test )
+{
+    if( !ref && !test )
+        return false;        // do not change order: no criteria to sort items
+
+    if( !ref || !ref->m_InUse )
+        return false;       // Not used: ref ordered after
+
+    if( !test || !test->m_InUse )
+        return true;        // Not used: ref ordered before
+
+    if( !ref->m_FileFunction && !test->m_FileFunction )
+        return false;        // do not change order: no criteria to sort items
+
+    if( !ref->m_FileFunction )
+        return false;
+
+    if( !test->m_FileFunction )
+        return true;
+
+    if( ref->m_FileFunction->GetZOrder() != test->m_FileFunction->GetZOrder() )
+        return ref->m_FileFunction->GetZOrder() > test->m_FileFunction->GetZOrder();
+
+    return ref->m_FileFunction->GetZSubOrder() > test->m_FileFunction->GetZSubOrder();
+}
+
+void GERBER_IMAGE_LIST::SortImagesByZOrder( GERBER_DRAW_ITEM* aDrawList )
+{
+    std::sort( m_GERBER_List.begin(), m_GERBER_List.end(), sortZorder );
+
+    // The image order has changed.
+    // Graphic layer numbering must be updated to match the widgets layer order
+
+    // Store the old/new graphic layer info:
+    std::map <int, int> tab_lyr;
+
+    for( unsigned layer = 0; layer < m_GERBER_List.size(); ++layer )
+    {
+        if( m_GERBER_List[layer] )
+        {
+            tab_lyr[m_GERBER_List[layer]->m_GraphicLayer] = layer;
+            m_GERBER_List[layer]->m_GraphicLayer = layer ;
+        }
+    }
+
+    // update the graphic layer in items to draw
+    for( GERBER_DRAW_ITEM* item = aDrawList; item; item = item->Next() )
+    {
+        int layer = item->GetLayer();
+        item->SetLayer( tab_lyr[layer] );
+    }
+}
+
+
+// The global image list:
+GERBER_IMAGE_LIST g_GERBER_List;

gerbview/class_GERBER.h

@@ -61,6 +61,7 @@ class D_CODE;
  */
 
 class GERBER_IMAGE;
+class X2_ATTRIBUTE_FILEFUNCTION;
 
 class GERBER_LAYER
 {
@@ -104,6 +105,11 @@ public:
                                                                 // (a file is loaded in it)
     wxString           m_FileName;                              // Full File Name for this layer
     wxString           m_ImageName;                             // Image name, from IN <name>* command
+    bool               m_IsX2_file;                             // true if a X2 gerber attribute was found in file
+    X2_ATTRIBUTE_FILEFUNCTION* m_FileFunction;                  // file function parameters, found in a %TF command
+                                                                // or a G04
+    wxString           m_MD5_value;                             // MD5 value found in a %TF.MD5 command
+    wxString           m_PartString;                            // string found in a %TF.Part command
     int                m_GraphicLayer;                          // Graphic layer Number
     bool               m_ImageNegative;                         // true = Negative image
     bool               m_ImageJustifyXCenter;                   // Image Justify Center on X axis (default = false)
@@ -306,5 +312,67 @@ public:
     void DisplayImageInfo( void );
 };
 
+/**
+ * @brief GERBER_IMAGE_LIST is a helper class to handle a list of GERBER_IMAGE files
+ * which are loaded and can be displayed
+ * there are 32 images max which can be loaded
+ */
+class GERBER_IMAGE_LIST
+{
+    // the list of loaded images (1 image = 1 gerber file)
+    std::vector<GERBER_IMAGE*> m_GERBER_List;
+
+public:
+    GERBER_IMAGE_LIST();
+    ~GERBER_IMAGE_LIST();
+
+    //Accessor
+    GERBER_IMAGE* GetGbrImage( int aIdx );
+
+    /**
+     * Add a GERBER_IMAGE* at index aIdx
+     * or at the first free location if aIdx < 0
+     * @param aGbrImage = the image to add
+     * @param aIdx = the location to use ( 0 ... GERBER_DRAWLAYERS_COUNT-1 )
+     * @return true if the index used, or -1 if no room to add image
+     */
+    int AddGbrImage( GERBER_IMAGE* aGbrImage, int aIdx );
+
+
+    /**
+     * remove all loaded data in list
+     */
+    void ClearList();
+
+    /**
+     * remove the loaded data of image aIdx
+     * @param aIdx = the index ( 0 ... GERBER_DRAWLAYERS_COUNT-1 )
+     */
+    void ClearImage( int aIdx );
+
+    /**
+     * @return a name for image aIdx which can be used in layers manager
+     * and layer selector
+     * is is "Layer n" (n = aIdx+1), followed by file attribute info (if X2 format)
+     * @param aIdx = the index ( 0 ... GERBER_DRAWLAYERS_COUNT-1 )
+     */
+    const wxString GetDisplayName( int aIdx );
+
+    /**
+     * @return true if image is used (loaded and with items)
+     * @param aIdx = the index ( 0 ... GERBER_DRAWLAYERS_COUNT-1 )
+     */
+    bool IsUsed( int aIdx );
+
+    /**
+     * Sort loaded images by Z order priority, if they have the X2 FileFormat info
+     * @param aDrawList: the draw list associated to the gerber images
+     * (SortImagesByZOrder updates the graphic layer of these items)
+     */
+    void SortImagesByZOrder( GERBER_DRAW_ITEM* aDrawList );
+};
+
+
+extern GERBER_IMAGE_LIST g_GERBER_List;
 
 #endif  // ifndef _CLASS_GERBER_H_

gerbview/class_X2_gerber_attributes.cpp

@@ -0,0 +1,253 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2010-2014 Jean-Pierre Charras  jp.charras at wanadoo.fr
+ * Copyright (C) 1992-2014 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 class_X2_gerber_attributes.cpp
+ */
+
+/*
+ * Manage the gerber extensions (attributes) in the new X2 version
+ * only few extensions are handled
+ * See http://www.ucamco.com/files/downloads/file/81/the_gerber_file_format_specification.pdf
+ *
+ * gerber attributes in the new X2 version look like:
+ * %TF.FileFunction,Copper,L1,Top*%
+ *
+ * Currently:
+ *  .FileFunction .FileFunction Identifies the file’s function in the PCB.
+ * Other Standard Attributes, not yet used in Gerbview:
+ *  .Part Identifies the part the file represents, e.g. a single PCB
+ *  .MD5 Sets the MD5 file signature or checksum.
+ */
+
+#include <wx/log.h>
+#include <class_X2_gerber_attributes.h>
+
+/*
+ * class X2_ATTRIBUTE
+ * The attribute value consists of a number of substrings separated by a “,”
+*/
+
+X2_ATTRIBUTE::X2_ATTRIBUTE()
+{
+}
+
+X2_ATTRIBUTE::~X2_ATTRIBUTE()
+{
+}
+
+/* return the attribute name (for instance .FileFunction)
+ * which is given by TF command.
+ */
+const wxString& X2_ATTRIBUTE::GetAttribute()
+{
+    return m_Prms.Item( 0 );
+}
+
+/* return a parameter
+ * aIdx = the index of the parameter
+ * aIdx = 0 is the parameter read after the TF function
+ * (the same as GetAttribute())
+ */
+const wxString& X2_ATTRIBUTE::GetPrm( int aIdx)
+{
+    static const wxString dummy;
+
+    if( GetPrmCount() < aIdx && aIdx >= 0 )
+        return m_Prms.Item( aIdx );
+
+    return dummy;
+}
+
+// Debug function: pring using wxLogMessage le list of parameters
+void X2_ATTRIBUTE::DbgListPrms()
+{
+    wxLogMessage( wxT("prms count %d"), GetPrmCount() );
+
+    for( int ii = 0; ii < GetPrmCount(); ii++ )
+        wxLogMessage( m_Prms.Item( ii ) );
+}
+
+/*
+ * parse a TF command and fill m_Prms by the parameters found.
+ * aFile = a FILE* ptr to the current Gerber file.
+ * buff = the buffer containing current Gerber data (GERBER_BUFZ size)
+ * text = a pointer to the first char to read in Gerber data
+ */
+bool X2_ATTRIBUTE::ParseAttribCmd( FILE* aFile, char *aBuffer, int aBuffSize, char*& aText )
+{
+    bool ok = true;
+    wxString data;
+
+    for( ; ; )
+    {
+        while( *aText )
+        {
+            switch( *aText )
+            {
+            case '%':       // end of command
+                return ok;  // success completion
+
+            case ' ':
+            case '\r':
+            case '\n':
+                aText++;
+                break;
+
+            case '*':       // End of block
+                m_Prms.Add( data );
+                data.Empty();
+                aText++;
+                break;
+
+            case ',':       // End of parameter
+                aText++;
+                m_Prms.Add( data );
+                data.Empty();
+                break;
+
+            default:
+                data.Append( *aText );
+                aText++;
+                break;
+            }
+        }
+
+        // end of current line, read another one.
+        if( aBuffer )
+        {
+            if( fgets( aBuffer, aBuffSize, aFile ) == NULL )
+            {
+                // end of file
+                ok = false;
+                break;
+            }
+
+            aText = aBuffer;
+        }
+        else
+            return ok;
+    }
+
+    return ok;
+}
+
+/*
+ * class X2_ATTRIBUTE_FILEFUNCTION ( from %TF.FileFunction in Gerber file)
+ *  Example file function:
+ *  %TF.FileFunction,Copper,L1,Top*%
+ * - Type. Such as copper, solder mask etc.
+ * - Position. Specifies where the file appears in the PCB layer structure.
+ *      Corresponding position substring:
+ *      Copper layer:   L1, L2, L3...to indicate the layer position followed by Top, Inr or
+ *                      Bot. L1 is always the top copper layer. E.g. L2,Inr.
+ *      Extra layer, e.g. solder mask: Top or Bot – defines the attachment of the layer.
+ *      Drill/rout layer: E.g. 1,4 – where 1 is the start and 4 is the end copper layer. The
+ *                        pair 1,4 defines the span of the drill/rout file
+ * Optional index. This can be used in instances where for example there are two solder
+ *                 masks on the same side. The index counts from the PCB surface outwards.
+ */
+X2_ATTRIBUTE_FILEFUNCTION::X2_ATTRIBUTE_FILEFUNCTION( X2_ATTRIBUTE& aAttributeBase )
+    : X2_ATTRIBUTE()
+{
+    m_Prms = aAttributeBase.GetPrms();
+    m_z_order = 0;
+
+    //ensure at least 5 parameters
+    while( GetPrmCount() < 5 )
+        m_Prms.Add( wxEmptyString );
+
+    set_Z_Order();
+}
+
+const wxString& X2_ATTRIBUTE_FILEFUNCTION::GetFileType()
+{
+    // the type of layer (Copper ,  Soldermask ... )
+    return m_Prms.Item( 1 );
+}
+
+const wxString& X2_ATTRIBUTE_FILEFUNCTION::GetBrdLayerId()
+{
+    // the brd layer identifier: Top, Bot, Ln
+    return m_Prms.Item( 2 );
+}
+
+
+const wxString& X2_ATTRIBUTE_FILEFUNCTION::GetLabel()
+{
+    // the filefunction label, if any
+    return m_Prms.Item( 3 );
+}
+
+
+// Initialize the z order priority of the current file, from its attributes
+// this priority is the order of layers from top to bottom to draw/display gerber images
+// Stack up is(  from external copper layer to external)
+// copper, then solder paste, then solder mask, then silk screen.
+// and global stackup is Front (top) layers then internal copper layers then Back (bottom) layers
+void X2_ATTRIBUTE_FILEFUNCTION::set_Z_Order()
+{
+    m_z_order = -100;     // low level
+    m_z_sub_order = 0;
+
+    if( GetFileType().IsSameAs( wxT( "Copper" ), false ) )
+    {
+        // Copper layer: the priority is the layer Id
+        m_z_order = 0;
+        wxString num = GetBrdLayerId().Mid( 1 );
+        long lnum;
+        if( num.ToLong( &lnum ) )
+            m_z_sub_order = -lnum;
+    }
+
+    if( GetFileType().IsSameAs( wxT( "Paste" ), false ) )
+    {
+        // solder paste layer: the priority is top then bottom
+        m_z_order = 1;       // for top
+
+        if( GetBrdLayerId().IsSameAs( wxT( "Bot" ), false ) )
+            m_z_order = -m_z_order;
+    }
+
+    if( GetFileType().IsSameAs( wxT( "Soldermask" ), false ) )
+    {
+        // solder mask layer: the priority is top then bottom
+        m_z_order = 2;       // for top
+
+        if( GetBrdLayerId().IsSameAs( wxT( "Bot" ), false ) )
+            m_z_order = -m_z_order;
+    }
+
+    if( GetFileType().IsSameAs( wxT( "Legend" ), false ) )
+    {
+        // Silk screen layer: the priority is top then bottom
+        m_z_order = 3;       // for top
+
+        if( GetFileType().IsSameAs( wxT( "Legend" ), false ) )
+
+        if( GetBrdLayerId().IsSameAs( wxT( "Bot" ), false ) )
+            m_z_order = -m_z_order;
+    }
+}
+

gerbview/class_X2_gerber_attributes.h

@@ -0,0 +1,171 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2010-2014 Jean-Pierre Charras  jp.charras at wanadoo.fr
+ * Copyright (C) 1992-2014 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 class_X2_gerber_attributes.h
+ */
+
+#ifndef _CLASS_X2_GERBER_ATTRIBUTE_H_
+#define _CLASS_X2_GERBER_ATTRIBUTE_H_
+
+/*
+ * Manage the gerber extensions (attributes) in the new X2 version
+ * only few extensions are handled
+ * See http://www.ucamco.com/files/downloads/file/81/the_gerber_file_format_specification.pdf
+ *
+ * gerber attributes in the new X2 version look like:
+ * %TF.FileFunction,Copper,L1,Top*%
+ *
+ * Currently:
+ *  .FileFunction .FileFunction Identifies the file’s function in the PCB.
+ * Other Standard Attributes, not yet used in Gerbview:
+ *  .Part Identifies the part the file represents, e.g. a single PCB
+ *  .MD5 Sets the MD5 file signature or checksum.
+ */
+
+#include <wx/arrstr.h>
+
+/**
+ * class X2_ATTRIBUTE
+ * The attribute value consists of a number of substrings separated by a “,”
+*/
+
+class X2_ATTRIBUTE
+{
+protected:
+    wxArrayString m_Prms;   ///< the list of parameters (after TF) in gbr file
+                            ///< the first one is the attribute name,
+                            ///< if starting by '.'
+
+public:
+    X2_ATTRIBUTE();
+    ~X2_ATTRIBUTE();
+
+    /**
+     * @return the parameters list read in TF command.
+     */
+    wxArrayString& GetPrms() { return m_Prms; }
+
+    /**
+     * @return a parameter read in TF command.
+     * @param aIdx = the index of the parameter
+     * aIdx = 0 is the parameter read after the TF function
+     * (the same as GetAttribute())
+     */
+    const wxString& GetPrm( int aIdx );
+
+    /**
+     * @return the attribute name (for instance .FileFunction)
+     * which is given by TF command (i.e. the first parameter read).
+     */
+    const wxString& GetAttribute();
+
+    /**
+     * @return the number of parameters read in TF command.
+     */
+    int GetPrmCount() { return int( m_Prms.GetCount() ); }
+
+    /**
+     * parse a TF command terminated with a % and fill m_Prms
+     * by the parameters found.
+     * @param aFile = a FILE* ptr to the current Gerber file.
+     * @param aBuffer = the buffer containing current Gerber data (can be null)
+     * @param aBuffSize = the size of the buffer
+     * @param aText = a pointer to the first char to read from Gerber data stored in aBuffer
+     *  After parsing, text points the last char of the command line ('%') (X2 mode)
+     *  or the end of line if the line does not contain '%' or aBuffer == NULL (X1 mode)
+     * @return true if no error.
+     */
+    bool ParseAttribCmd( FILE* aFile, char *aBuffer, int aBuffSize, char*& aText );
+
+    /**
+     * Debug function: pring using wxLogMessage le list of parameters
+     */
+    void DbgListPrms();
+
+    /**
+     * return true if the attribute is .FileFunction
+     */
+    bool IsFileFunction()
+    {
+        return GetAttribute().IsSameAs( wxT(".FileFunction"), false );
+    }
+
+    /**
+     * return true if the attribute is .MD5
+     */
+    bool IsFileMD5()
+    {
+        return GetAttribute().IsSameAs( wxT(".MD5"), false );
+    }
+
+    /**
+     * return true if the attribute is .Part
+     */
+    bool IsFilePart()
+    {
+        return GetAttribute().IsSameAs( wxT(".Part"), false );
+    }
+};
+
+/**
+ * class X2_ATTRIBUTE_FILEFUNCTION ( from %TF.FileFunction in Gerber file)
+ *  Example file function:
+ *  %TF.FileFunction,Copper,L1,Top*%
+ * - Type. Such as copper, solder mask etc.
+ * - Position. Specifies where the file appears in the PCB layer structure.
+ *      Corresponding position substring:
+ *      Copper layer:   L1, L2, L3...to indicate the layer position followed by Top, Inr or
+ *                      Bot. L1 is always the top copper layer. E.g. L2,Inr.
+ *      Extra layer, e.g. solder mask: Top or Bot – defines the attachment of the layer.
+ *      Drill/rout layer: E.g. 1,4 – where 1 is the start and 4 is the end copper layer. The
+ *                        pair 1,4 defines the span of the drill/rout file
+ * Optional index. This can be used in instances where for example there are two solder
+ *                 masks on the same side. The index counts from the PCB surface outwards.
+ */
+
+class X2_ATTRIBUTE_FILEFUNCTION : public X2_ATTRIBUTE
+{
+    int m_z_order;              // the z order of the layer for a board
+    int m_z_sub_order;          // the z sub_order of the copper layer for a board
+
+public:
+    X2_ATTRIBUTE_FILEFUNCTION( X2_ATTRIBUTE& aAttributeBase );
+
+    const wxString& GetFileType();    ///< the type of layer (Copper ,  Soldermask ... )
+    const wxString& GetBrdLayerId();  ///< the brd layer identifier: Top, Bot, Ln
+    const wxString& GetLabel();       ///< the filefunction label, if any
+
+    int GetZOrder() { return m_z_order; }   ///< the Order of the bdr layer, from front (Top side) to back side
+    int GetZSubOrder() { return m_z_sub_order; }   ///< the Order of the bdr copper layer, from front (Top side) to back side
+
+private:
+
+    /**
+     * Initialize the z order priority of the current file, from its attributes
+     */
+    void set_Z_Order();
+};
+
+#endif      // _CLASS_X2_GERBER_ATTRIBUTE_H_

gerbview/class_gbr_layer_box_selector.cpp

@@ -33,11 +33,14 @@
 #include <colors_selection.h>
 #include <layers_id_colors_and_visibility.h>
 #include <gerbview_frame.h>
+#include <class_GERBER.h>
+#include <class_X2_gerber_attributes.h>
 
 #include <class_gbr_layer_box_selector.h>
 
 void GBR_LAYER_BOX_SELECTOR::Resync()
 {
+    Freeze();
     Clear();
 
     for( int layerid = 0; layerid < GERBER_DRAWLAYERS_COUNT; ++layerid )
@@ -55,6 +58,8 @@ void GBR_LAYER_BOX_SELECTOR::Resync()
 
         Append( layername, layerbmp, (void*)(intptr_t) layerid );
     }
+
+    Thaw();
 }
 
 
@@ -70,7 +75,7 @@ EDA_COLOR_T GBR_LAYER_BOX_SELECTOR::GetLayerColor( int aLayer ) const
 // Returns the name of the layer id
 wxString GBR_LAYER_BOX_SELECTOR::GetLayerName( int aLayer ) const
 {
-    wxString name;
-    name.Printf( _( "Layer %d" ), aLayer + 1 );
+    wxString name = g_GERBER_List.GetDisplayName( aLayer );
+
     return name;
 }

gerbview/class_gbr_layout.cpp

@@ -39,7 +39,6 @@ GBR_LAYOUT::GBR_LAYOUT()
     PAGE_INFO pageInfo( wxT( "GERBER" ) );
     SetPageSettings( pageInfo );
 
-// no    m_printLayersMask = -1;
     m_printLayersMask.set();
 }
 

gerbview/class_gbr_layout.h

@@ -24,7 +24,8 @@
 
 /**
  * @file class_gbr_layout.h
- * @brief Class CLASS_GBR_LAYOUT to handle a board.
+ * @brief Class CLASS_GBR_LAYOUT to handle info to draw/print loaded Gerber images
+ * and page frame reference
  */
 
 #ifndef CLASS_GBR_LAYOUT_H
@@ -55,7 +56,7 @@ private:
     std::bitset <GERBER_DRAWLAYERS_COUNT> m_printLayersMask; // When printing: the list of layers to print
 public:
 
-    DLIST<GERBER_DRAW_ITEM> m_Drawings;     // linked list of Gerber Items
+    DLIST<GERBER_DRAW_ITEM> m_Drawings;     // linked list of Gerber Items to draw
 
     GBR_LAYOUT();
     ~GBR_LAYOUT();

gerbview/class_gerber_draw_item.cpp

@@ -225,7 +225,9 @@ D_CODE* GERBER_DRAW_ITEM::GetDcodeDescr()
 {
     if( (m_DCode < FIRST_DCODE) || (m_DCode > LAST_DCODE) )
         return NULL;
-    GERBER_IMAGE* gerber = g_GERBER_List[m_Layer];
+
+    GERBER_IMAGE* gerber = g_GERBER_List.GetGbrImage( m_Layer );
+
     if( gerber == NULL )
         return NULL;
 

gerbview/class_gerbview_layer_widget.cpp

@@ -41,6 +41,7 @@
 #include <class_GERBER.h>
 #include <layer_widget.h>
 #include <class_gerbview_layer_widget.h>
+#include <class_X2_gerber_attributes.h>
 
 
 /*
@@ -70,7 +71,7 @@ GERBER_LAYER_WIDGET::GERBER_LAYER_WIDGET( GERBVIEW_FRAME* aParent, wxWindow* aFo
 
     // since Popupmenu() calls this->ProcessEvent() we must call this->Connect()
     // and not m_LayerScrolledWindow->Connect()
-    Connect( ID_SHOW_ALL_LAYERS, ID_ALWAYS_SHOW_NO_LAYERS_BUT_ACTIVE,
+    Connect( ID_LAYER_MANAGER_START, ID_LAYER_MANAGER_END,
         wxEVT_COMMAND_MENU_SELECTED,
         wxCommandEventHandler( GERBER_LAYER_WIDGET::onPopupSelection ), NULL, this );
 
@@ -146,8 +147,7 @@ void GERBER_LAYER_WIDGET::onRightDownLayers( wxMouseEvent& event )
 {
     wxMenu          menu;
 
-    // menu text is capitalized:
-    // http://library.gnome.org/devel/hig-book/2.20/design-text-labels.html.en#layout-capitalization
+    // Remember: menu text is capitalized (see our rules_for_capitalization_in_Kicad_UI.txt)
     menu.Append( new wxMenuItem( &menu, ID_SHOW_ALL_LAYERS,
                                  _("Show All Layers") ) );
 
@@ -160,6 +160,9 @@ void GERBER_LAYER_WIDGET::onRightDownLayers( wxMouseEvent& event )
     menu.Append( new wxMenuItem( &menu, ID_SHOW_NO_LAYERS,
                                  _( "Hide All Layers" ) ) );
 
+    menu.AppendSeparator();
+    menu.Append( new wxMenuItem( &menu, ID_SORT_GBR_LAYERS,
+                                 _( "Sort Layers if X2 Mode" ) ) );
     PopupMenu( &menu );
 
     passOnFocus();
@@ -204,6 +207,13 @@ void GERBER_LAYER_WIDGET::onPopupSelection( wxCommandEvent& event )
         myframe->SetVisibleLayers( visibleLayers );
         myframe->GetCanvas()->Refresh();
         break;
+
+    case ID_SORT_GBR_LAYERS:
+        g_GERBER_List.SortImagesByZOrder( myframe->GetItemsList() );
+        myframe->ReFillLayerWidget();
+        myframe->syncLayerBox();
+        myframe->GetCanvas()->Refresh();
+        break;
     }
 }
 
@@ -212,7 +222,7 @@ bool  GERBER_LAYER_WIDGET::OnLayerSelected()
     if( !m_alwaysShowActiveLayer )
         return false;
 
-    // postprocess after an active layer selection
+    // postprocess after active layer selection
     // ensure active layer visible
     wxCommandEvent event;
     event.SetId( ID_ALWAYS_SHOW_NO_LAYERS_BUT_ACTIVE );
@@ -223,16 +233,20 @@ bool  GERBER_LAYER_WIDGET::OnLayerSelected()
 
 void GERBER_LAYER_WIDGET::ReFill()
 {
+    Freeze();
+
     ClearLayerRows();
 
     for( int layer = 0; layer < GERBER_DRAWLAYERS_COUNT; ++layer )
     {
-        wxString msg;
-        msg.Printf( _("Layer %d"), layer+1 );
+        wxString msg = g_GERBER_List.GetDisplayName( layer );
+
         AppendLayerRow( LAYER_WIDGET::ROW( msg, layer,
                         myframe->GetLayerColor( layer ), wxEmptyString, true ) );
     }
 
+    Thaw();
+
     installRightLayerClickHandler();
 }
 
@@ -298,17 +312,10 @@ void GERBER_LAYER_WIDGET::OnRenderEnable( int aId, bool isEnabled )
  */
 bool GERBER_LAYER_WIDGET::useAlternateBitmap(int aRow)
 {
-    bool inUse = false;
-    GERBER_IMAGE* gerber = g_GERBER_List[aRow];
-
-    if( gerber != NULL && gerber->m_InUse )
-        inUse = true;
-
-    return inUse;
+    return g_GERBER_List.IsUsed( aRow );
 }
 
-/**
- * Function UpdateLayerIcons
+/*
  * Update the layer manager icons (layers only)
  * Useful when loading a file or clearing a layer because they change
  */
@@ -322,7 +329,8 @@ void GERBER_LAYER_WIDGET::UpdateLayerIcons()
             continue;
 
         if( row == m_CurrentRow )
-            bm->SetBitmap( useAlternateBitmap(row) ? *m_RightArrowAlternateBitmap : *m_RightArrowBitmap );
+            bm->SetBitmap( useAlternateBitmap(row) ? *m_RightArrowAlternateBitmap :
+                           *m_RightArrowBitmap );
         else
             bm->SetBitmap( useAlternateBitmap(row) ? *m_BlankAlternateBitmap : *m_BlankBitmap );
     }

gerbview/class_gerbview_layer_widget.h

@@ -33,6 +33,18 @@
 
 #include <layer_widget.h>
 
+// popup menu ids. in layer manager
+enum LAYER_MANAGER
+{
+    ID_LAYER_MANAGER_START = wxID_HIGHEST+1,
+    ID_SHOW_ALL_LAYERS = ID_LAYER_MANAGER_START,
+    ID_SHOW_NO_LAYERS,
+    ID_SHOW_NO_LAYERS_BUT_ACTIVE,
+    ID_ALWAYS_SHOW_NO_LAYERS_BUT_ACTIVE,
+    ID_SORT_GBR_LAYERS,
+    ID_LAYER_MANAGER_END = ID_SORT_GBR_LAYERS,
+};
+
 /**
  * Class GERBER_LAYER_WIDGET
  * is here to implement the abtract functions of LAYER_WIDGET so they
@@ -45,11 +57,6 @@ class GERBER_LAYER_WIDGET : public LAYER_WIDGET
     bool m_alwaysShowActiveLayer;   // If true: Only shows the current active layer
                                     // even if it is changed
 
-    // popup menu ids.
-#define ID_SHOW_ALL_LAYERS                      wxID_HIGHEST
-#define ID_SHOW_NO_LAYERS                       (wxID_HIGHEST+1)
-#define ID_SHOW_NO_LAYERS_BUT_ACTIVE            (wxID_HIGHEST+2)
-#define ID_ALWAYS_SHOW_NO_LAYERS_BUT_ACTIVE     (wxID_HIGHEST+3)
 
     /**
      * Function OnRightDownLayers

gerbview/dialogs/dialog_print_using_printer.cpp

@@ -37,6 +37,7 @@
 
 #include <gerbview.h>
 #include <gerbview_frame.h>
+#include <class_GERBER.h>
 #include <pcbplot.h>
 
 static double s_ScaleList[] =
@@ -163,7 +164,7 @@ void DIALOG_PRINT_USING_PRINTER::InitValues( )
         msg << wxT( " " ) << ii + 1;
         m_BoxSelectLayer[ii] = new wxCheckBox( this, -1, msg );
 
-        if( g_GERBER_List[ii] == NULL )     // Nothing loaded on this draw layer
+        if( g_GERBER_List.GetGbrImage( ii ) == NULL )     // Nothing loaded on this draw layer
             m_BoxSelectLayer[ii]->Enable( false );
 
         if( ii < 16 )

gerbview/draw_gerber_screen.cpp

@@ -214,14 +214,16 @@ void GBR_LAYOUT::Draw( EDA_DRAW_PANEL* aPanel, wxDC* aDC, GR_DRAWMODE aDrawMode,
 
     bool end = false;
 
-    for( int layer = 0; !end; ++layer )
+    // Draw layers from bottom to top, and active layer last
+    // in non transparent modes, the last layer drawn mask mask previously drawn layer
+    for( int layer = GERBER_DRAWLAYERS_COUNT-1; !end; --layer )
     {
         int active_layer = gerbFrame->getActiveLayer();
 
         if( layer == active_layer ) // active layer will be drawn after other layers
             continue;
 
-        if( layer == GERBER_DRAWLAYERS_COUNT )   // last loop: draw active layer
+        if( layer < 0 )   // last loop: draw active layer
         {
             end   = true;
             layer = active_layer;
@@ -230,7 +232,7 @@ void GBR_LAYOUT::Draw( EDA_DRAW_PANEL* aPanel, wxDC* aDC, GR_DRAWMODE aDrawMode,
         if( !gerbFrame->IsLayerVisible( layer ) )
             continue;
 
-        GERBER_IMAGE* gerber = g_GERBER_List[layer];
+        GERBER_IMAGE* gerber = g_GERBER_List.GetGbrImage( layer );
 
         if( gerber == NULL )    // Graphic layer not yet used
             continue;

gerbview/events_called_functions.cpp

@@ -234,7 +234,7 @@ void GERBVIEW_FRAME::Process_Special_Functions( wxCommandEvent& event )
 
 void GERBVIEW_FRAME::OnSelectActiveDCode( wxCommandEvent& event )
 {
-    GERBER_IMAGE* gerber_image = g_GERBER_List[getActiveLayer()];
+    GERBER_IMAGE* gerber_image = g_GERBER_List.GetGbrImage( getActiveLayer() );
 
     if( gerber_image )
     {
@@ -266,7 +266,7 @@ void GERBVIEW_FRAME::OnSelectActiveLayer( wxCommandEvent& event )
 void GERBVIEW_FRAME::OnShowGerberSourceFile( wxCommandEvent& event )
 {
     int     layer = getActiveLayer();
-    GERBER_IMAGE* gerber_layer = g_GERBER_List[layer];
+    GERBER_IMAGE* gerber_layer = g_GERBER_List.GetGbrImage( layer );
 
     if( gerber_layer )
     {

gerbview/excellon_read_drill_file.cpp

@@ -169,13 +169,20 @@ bool GERBVIEW_FRAME::Read_EXCELLON_File( const wxString& aFullFileName )
 {
     wxString msg;
     int layer = getActiveLayer();      // current layer used in GerbView
+    EXCELLON_IMAGE* drill_Layer = (EXCELLON_IMAGE*) g_GERBER_List.GetGbrImage( layer );
 
-    if( g_GERBER_List[layer] == NULL )
+    if( drill_Layer == NULL )
     {
-        g_GERBER_List[layer] = new EXCELLON_IMAGE( this, layer );
+        drill_Layer = new EXCELLON_IMAGE( this, layer );
+        layer = g_GERBER_List.AddGbrImage( drill_Layer, layer );
+    }
+
+    if( layer < 0 )
+    {
+        DisplayError( this, _( "No room to load file" ) );
+        return false;
     }
 
-    EXCELLON_IMAGE* drill_Layer = (EXCELLON_IMAGE*) g_GERBER_List[layer];
     ClearMessageList();
 
     /* Read the gerber file */
@@ -183,7 +190,7 @@ bool GERBVIEW_FRAME::Read_EXCELLON_File( const wxString& aFullFileName )
     if( file == NULL )
     {
         msg.Printf( _( "File %s not found" ), GetChars( aFullFileName ) );
-        DisplayError( this, msg, 10 );
+        DisplayError( this, msg );
         return false;
     }
 

gerbview/export_to_pcbnew.cpp

@@ -39,6 +39,7 @@
 #include <gerbview.h>
 #include <gerbview_frame.h>
 #include <class_gerber_draw_item.h>
+#include <class_GERBER.h>
 #include <select_layers_to_pcb.h>
 #include <build_version.h>
 #include <wildcards_and_files_ext.h>
@@ -159,7 +160,7 @@ void GERBVIEW_FRAME::ExportDataInPcbnewFormat( wxCommandEvent& event )
     // Count the Gerber layers which are actually currently used
     for( LAYER_NUM ii = 0; ii < GERBER_DRAWLAYERS_COUNT; ++ii )
     {
-        if( g_GERBER_List[ii] != NULL )
+        if( g_GERBER_List.GetGbrImage( ii ) )
             layercount++;
     }
 

gerbview/files.cpp

@@ -84,6 +84,7 @@ void GERBVIEW_FRAME::Files_io( wxCommandEvent& event )
         Zoom_Automatique( false );
         m_canvas->Refresh();
         ClearMsgPanel();
+        ReFillLayerWidget();
         break;
 
     case ID_GERBVIEW_LOAD_DRILL_FILE:
@@ -200,6 +201,7 @@ bool GERBVIEW_FRAME::LoadGerberFiles( const wxString& aFullFileName )
     Zoom_Automatique( false );
 
     // Synchronize layers tools with actual active layer:
+    ReFillLayerWidget();
     setActiveLayer( getActiveLayer() );
     m_LayersManager->UpdateLayerIcons();
     syncLayerBox();
@@ -282,6 +284,7 @@ bool GERBVIEW_FRAME::LoadExcellonFiles( const wxString& aFullFileName )
     Zoom_Automatique( false );
 
     // Synchronize layers tools with actual active layer:
+    ReFillLayerWidget();
     setActiveLayer( getActiveLayer() );
     m_LayersManager->UpdateLayerIcons();
     syncLayerBox();

gerbview/gerbview.cpp

@@ -45,7 +45,6 @@
 
 // Colors for layers and items
 COLORS_DESIGN_SETTINGS g_ColorsSettings;
-int g_Default_GERBER_Format;
 
 
 const wxChar* g_GerberPageSizeList[] = {
@@ -60,9 +59,6 @@ const wxChar* g_GerberPageSizeList[] = {
 };
 
 
-GERBER_IMAGE*  g_GERBER_List[32];
-
-
 namespace GERBV {
 
 static struct IFACE : public KIFACE_I

gerbview/gerbview.h

@@ -109,6 +109,4 @@ enum Gerb_Analyse_Cmd
     ENTER_RS274X_CMD
 };
 
-extern GERBER_IMAGE* g_GERBER_List[GERBER_DRAWLAYERS_COUNT];
-
 #endif  // ifndef GERBVIEW_H

gerbview/gerbview_frame.cpp

@@ -348,7 +348,7 @@ int GERBVIEW_FRAME::getNextAvailableLayer( int aLayer ) const
 
     for( int i = 0; i < GERBER_DRAWLAYERS_COUNT; ++i )
     {
-        GERBER_IMAGE* gerber = g_GERBER_List[ layer ];
+        GERBER_IMAGE* gerber = g_GERBER_List.GetGbrImage( layer );
 
         if( gerber == NULL || gerber->m_FileName.IsEmpty() )
             return layer;
@@ -378,9 +378,11 @@ void GERBVIEW_FRAME::syncLayerWidget()
  */
 void GERBVIEW_FRAME::syncLayerBox()
 {
+    m_SelLayerBox->Resync();
     m_SelLayerBox->SetSelection( getActiveLayer() );
+
     int             dcodeSelected = -1;
-    GERBER_IMAGE*   gerber = g_GERBER_List[getActiveLayer()];
+    GERBER_IMAGE*   gerber = g_GERBER_List.GetGbrImage( getActiveLayer() );
 
     if( gerber )
         dcodeSelected = gerber->m_Selected_Tool;
@@ -406,7 +408,7 @@ void GERBVIEW_FRAME::Liste_D_Codes()
 
     for( int layer = 0; layer < GERBER_DRAWLAYERS_COUNT; ++layer )
     {
-        GERBER_IMAGE* gerber = g_GERBER_List[layer];
+        GERBER_IMAGE* gerber = g_GERBER_List.GetGbrImage( layer );
 
         if( gerber == NULL )
             continue;
@@ -474,7 +476,7 @@ void GERBVIEW_FRAME::Liste_D_Codes()
  */
 void GERBVIEW_FRAME::UpdateTitleAndInfo()
 {
-    GERBER_IMAGE*   gerber = g_GERBER_List[ getActiveLayer() ];
+    GERBER_IMAGE*   gerber = g_GERBER_List.GetGbrImage(  getActiveLayer() );
     wxString        text;
 
     // Display the gerber filename
@@ -491,6 +493,8 @@ void GERBVIEW_FRAME::UpdateTitleAndInfo()
 
     text = _( "File:" );
     text << wxT( " " ) << gerber->m_FileName;
+    if( gerber->m_IsX2_file )
+        text << wxT( " " ) << _( "(with X2 Attributes)" );
     SetTitle( text );
 
     gerber->DisplayImageInfo();
@@ -508,7 +512,13 @@ void GERBVIEW_FRAME::UpdateTitleAndInfo()
                  gerber->m_FmtLen.y - gerber->m_FmtScale.y, gerber->m_FmtScale.y,
                  gerber->m_NoTrailingZeros ? 'T' : 'L' );
 
+    if( gerber->m_IsX2_file )
+        text << wxT(" ") << _( "X2 attr" );
+
     m_TextInfo->SetValue( text );
+
+    if( EnsureTextCtrlWidth( m_TextInfo, &text ) )  // Resized
+       m_auimgr.Update();
 }
 
 /*

gerbview/init_gbr_drawlayers.cpp

@@ -40,8 +40,6 @@
 
 bool GERBVIEW_FRAME::Clear_DrawLayers( bool query )
 {
-    int layer;
-
     if( GetGerberLayout() == NULL )
         return false;
 
@@ -53,14 +51,7 @@ bool GERBVIEW_FRAME::Clear_DrawLayers( bool query )
 
     GetGerberLayout()->m_Drawings.DeleteAll();
 
-    for( layer = 0; layer < GERBER_DRAWLAYERS_COUNT; ++layer )
-    {
-        if( g_GERBER_List[layer] )
-        {
-            g_GERBER_List[layer]->InitToolTable();
-            g_GERBER_List[layer]->ResetDefaultValues();
-        }
-    }
+    g_GERBER_List.ClearList();
 
     GetGerberLayout()->SetBoundingBox( EDA_RECT() );
 
@@ -98,11 +89,7 @@ void GERBVIEW_FRAME::Erase_Current_DrawLayer( bool query )
         item->DeleteStructure();
     }
 
-    if( g_GERBER_List[layer] )
-    {
-        g_GERBER_List[layer]->InitToolTable();
-        g_GERBER_List[layer]->ResetDefaultValues();
-    }
+    g_GERBER_List.ClearImage( layer );
 
     GetScreen()->SetModify();
     m_canvas->Refresh();

gerbview/onleftclick.cpp

@@ -56,7 +56,7 @@ void GERBVIEW_FRAME::OnLeftClick( wxDC* DC, const wxPoint& aPosition )
             GetScreen()->SetCurItem( DrawStruct );
             if( DrawStruct == NULL )
             {
-                GERBER_IMAGE* gerber = g_GERBER_List[getActiveLayer() ];
+                GERBER_IMAGE* gerber = g_GERBER_List.GetGbrImage( getActiveLayer() );
                 if( gerber )
                     gerber->DisplayImageInfo( );
             }

gerbview/readgerb.cpp

@@ -34,7 +34,7 @@
 #include <html_messagebox.h>
 #include <macros.h>
 
-/* Read a gerber file, RS274D or RS274X format.
+/* Read a gerber file, RS274D, RS274X or RS274X2 format.
  */
 bool GERBVIEW_FRAME::Read_GERBER_File( const wxString& GERBER_FullFileName,
                                            const wxString& D_Code_FullFileName )
@@ -49,13 +49,14 @@ bool GERBVIEW_FRAME::Read_GERBER_File( const wxString& GERBER_FullFileName,
     int layer;         // current layer used in GerbView
 
     layer = getActiveLayer();
+    GERBER_IMAGE* gerber = g_GERBER_List.GetGbrImage( layer );
 
-    if( g_GERBER_List[layer] == NULL )
+    if( gerber == NULL )
     {
-        g_GERBER_List[layer] = new GERBER_IMAGE( this, layer );
+        gerber = new GERBER_IMAGE( this, layer );
+        g_GERBER_List.AddGbrImage( gerber, layer );
     }
 
-    GERBER_IMAGE* gerber = g_GERBER_List[layer];
     ClearMessageList( );
 
     /* Set the gerber scale: */

gerbview/rs274d.cpp

@@ -35,6 +35,7 @@
 #include <macros.h>
 #include <class_gerber_draw_item.h>
 #include <class_GERBER.h>
+#include <class_X2_gerber_attributes.h>
 
 #include <cmath>
 
@@ -43,7 +44,8 @@
  * G01 linear interpolation (right trace)
  * G02, G20, G21 Circular interpolation, meaning trig <0 (clockwise)
  * G03, G30, G31 Circular interpolation, meaning trigo> 0 (counterclockwise)
- * G04 = comment
+ * G04 = comment. Since Sept 2014, file attributes can be found here
+ *       if the line starts by G04 #@!
  * G06 parabolic interpolation
  * G07 Cubic Interpolation
  * G10 linear interpolation (scale x10)
@@ -473,9 +475,22 @@ bool GERBER_IMAGE::Execute_G_Command( char*& text, int G_command )
         break;
 
     case GC_COMMENT:
-        // Skip comment
+        // Skip comment, but only if the line does not start by "G04 #@! TF"
+        // which is a metadata
+        if( strncmp( text, " #@! TF", 7 ) == 0 )
+        {
+            text += 7;
+            X2_ATTRIBUTE dummy;
+            dummy.ParseAttribCmd( m_Current_File, NULL, 0, text );
+            if( dummy.IsFileFunction() )
+            {
+                delete m_FileFunction;
+                m_FileFunction = new X2_ATTRIBUTE_FILEFUNCTION( dummy );
+            }
+        }
+
         while ( *text && (*text != '*') )
-            text++;
+                    text++;
         break;
 
     case GC_LINEAR_INTERPOL_10X:

gerbview/rs274x.cpp

@@ -33,6 +33,7 @@
 
 #include <gerbview.h>
 #include <class_GERBER.h>
+#include <class_X2_gerber_attributes.h>
 
 extern int ReadInt( char*& text, bool aSkipSeparator = true );
 extern double ReadDouble( char*& text, bool aSkipSeparator = true );
@@ -78,6 +79,13 @@ enum RS274X_PARAMETERS {
     AP_DEFINITION   = CODE( 'A', 'D' ),
     AP_MACRO = CODE( 'A', 'M' ),
 
+    // X2 extention attribute commands
+    // Mainly are found standard attributes and user attributes
+    // standard attributes commands are:
+    // TF (file attribute)
+    // TA (aperture attribute) and TD (delete aperture attribute)
+    FILE_ATTRIBUTE   = CODE( 'T', 'F' ),
+
     // Layer specific parameters
     // May be used singly or may be layer specfic
     // theses parameters are at the beginning of the file or layer
@@ -307,7 +315,7 @@ bool GERBER_IMAGE::ExecuteRS274XCommand( int       command,
             m_SwapAxis = true;
         break;
 
-    case MIRROR_IMAGE:      // commanf %MIA0B0*%, %MIA0B1*%, %MIA1B0*%, %MIA1B1*%
+    case MIRROR_IMAGE:      // command %MIA0B0*%, %MIA0B1*%, %MIA1B0*%, %MIA1B1*%
         m_MirrorA = m_MirrorB = 0;
         while( *text && *text != '*' )
         {
@@ -341,6 +349,27 @@ bool GERBER_IMAGE::ExecuteRS274XCommand( int       command,
         conv_scale = m_GerbMetric ? IU_PER_MILS / 25.4 : IU_PER_MILS;
         break;
 
+    case FILE_ATTRIBUTE:    // Command %TF ...
+        m_IsX2_file = true;
+    {
+        X2_ATTRIBUTE dummy;
+        dummy.ParseAttribCmd( m_Current_File, buff, GERBER_BUFZ, text );
+        if( dummy.IsFileFunction() )
+        {
+            delete m_FileFunction;
+            m_FileFunction = new X2_ATTRIBUTE_FILEFUNCTION( dummy );
+        }
+        else if( dummy.IsFileMD5() )
+        {
+            m_MD5_value = dummy.GetPrm( 1 );
+        }
+        else if( dummy.IsFilePart() )
+        {
+            m_PartString = dummy.GetPrm( 1 );
+        }
+     }
+        break;
+
     case OFFSET:        // command: OFAnnBnn (nn = float number) = layer Offset
         m_Offset.x = m_Offset.y = 0;
         while( *text != '*' )

gerbview/select_layers_to_pcb.cpp

@@ -121,7 +121,7 @@ void LAYERS_MAP_DIALOG::initDialog()
     m_gerberActiveLayersCount = 0;
     for( int ii = 0; ii < GERBER_DRAWLAYERS_COUNT; ++ii )
     {
-        if( g_GERBER_List[ii] == NULL )
+        if( g_GERBER_List.GetGbrImage( ii ) == NULL )
             break;
 
         if( (pcb_layer_num == m_exportBoardCopperLayersCount - 1)
@@ -189,7 +189,7 @@ void LAYERS_MAP_DIALOG::initDialog()
                                  wxRIGHT | wxLEFT, 5 );
 
         /* Add file name and extension without path. */
-        wxFileName fn( g_GERBER_List[ii]->m_FileName );
+        wxFileName fn( g_GERBER_List.GetGbrImage( ii )->m_FileName );
         label = new wxStaticText( this, wxID_STATIC, fn.GetFullName(),
                                   wxDefaultPosition, wxDefaultSize );
         flexColumnBoxSizer->Add( label, 0,

gerbview/toolbars_gerber.cpp

@@ -294,7 +294,7 @@ void GERBVIEW_FRAME::OnUpdateShowLayerManager( wxUpdateUIEvent& aEvent )
 void GERBVIEW_FRAME::OnUpdateSelectDCode( wxUpdateUIEvent& aEvent )
 {
     int layer = getActiveLayer();
-    GERBER_IMAGE* gerber = g_GERBER_List[layer];
+    GERBER_IMAGE* gerber = g_GERBER_List.GetGbrImage( layer );
     int selected = ( gerber ) ? gerber->m_Selected_Tool : 0;
 
     if( m_DCodeSelector && m_DCodeSelector->GetSelectedDCodeId() != selected )