Gerber plotter: prepare optimization of aperture macros type free polygons.

They are used for chamfered round rect pads, and can be used for custom shaped pads.
No actual change currently, but the shape rotation of custom pads and chamfered rr pads
can be now used in gerber plots.

common/plotters/GERBER_plotter.cpp

@@ -52,6 +52,13 @@
 #define GBR_USE_MACROS_FOR_TRAPEZOID
 #define GBR_USE_MACROS_FOR_ROTATED_OVAL
 #define GBR_USE_MACROS_FOR_ROTATED_RECT
+//#define GBR_USE_MACROS_FOR_CUSTOM_PAD     // work in progress
+
+// max count of corners to create a aperture macro for a custom shape.
+// provided just in case a aperture macro type free polygon creates issues
+// when the number of corners is too high.
+// (1 corner = up to 24 chars)
+#define GBR_MACRO_FOR_CUSTOM_PAD_MAX_CORNER_COUNT 100000
 
 GERBER_PLOTTER::GERBER_PLOTTER()
 {
@@ -690,6 +697,10 @@ void GERBER_PLOTTER::writeApertureList()
                 fprintf( m_outputFile, "%%%s%d*\n", "AMFp", tool.m_DCode );
                 fprintf( m_outputFile, "4,1,%d,", (int)tool.m_Corners.size() );
 
+                // Insert a newline after curr_line_count_max coordiantes.
+                int curr_line_corner_count = 0;
+                const int curr_line_count_max = 50;     // <= 0 to disable newlines
+
                 for( size_t ii = 0; ii <= tool.m_Corners.size(); ii++ )
                 {
                     int jj = ii;
@@ -697,8 +708,14 @@ void GERBER_PLOTTER::writeApertureList()
                     if( ii >= tool.m_Corners.size() )
                         jj = 0;
 
-                fprintf( m_outputFile, "%#f,%#f,",
-                         tool.m_Corners[jj].x * fscale, -tool.m_Corners[jj].y * fscale );
+                    fprintf( m_outputFile, "%#f,%#f,",
+                             tool.m_Corners[jj].x * fscale, -tool.m_Corners[jj].y * fscale );
+                    if( curr_line_count_max >= 0
+                            && ++curr_line_corner_count >= curr_line_count_max )
+                    {
+                        fprintf( m_outputFile, "\n" );
+                        curr_line_corner_count = 0;
+                    }
                 }
                 // output rotation parameter
                 fputs( "$1*%\n", m_outputFile );
@@ -1428,7 +1445,7 @@ void GERBER_PLOTTER::plotRoundRectAsRegion( const wxPoint& aRectCenter, const wx
 
 
 void GERBER_PLOTTER::FlashPadCustom( const wxPoint& aPadPos, const wxSize& aSize,
-                                     SHAPE_POLY_SET* aPolygons,
+                                     double aOrient, SHAPE_POLY_SET* aPolygons,
                                      OUTLINE_MODE aTraceMode, void* aData )
 
 {
@@ -1463,7 +1480,32 @@ void GERBER_PLOTTER::FlashPadCustom( const wxPoint& aPadPos, const wxSize& aSize
         if( aTraceMode == SKETCH )
             PlotPoly( cornerList, FILL_TYPE::NO_FILL, GetCurrentLineWidth(), &gbr_metadata );
         else
+        {
+#ifdef GBR_USE_MACROS_FOR_CUSTOM_PAD
+            if( m_gerberDisableApertMacros
+                    || cornerList.size() > GBR_MACRO_FOR_CUSTOM_PAD_MAX_CORNER_COUNT )
+                PlotGerberRegion( cornerList, &gbr_metadata );
+            else
+            {
+               // An AM will be created. the shape must be in position 0,0 and orientation 0
+                // to be able to reuse the same AM for pads having the same shape
+                for( size_t ii = 0; ii < cornerList.size(); ii++ )
+                {
+                    cornerList[ii] -= aPadPos;
+                    RotatePoint( &cornerList[ii], -aOrient );
+                }
+
+                DPOINT pos_dev = userToDeviceCoordinates( aPadPos );
+                selectAperture( cornerList, aOrient/10.0,
+                                APERTURE::AM_FREE_POLYGON, gbr_metadata.GetApertureAttrib() );
+                formatNetAttribute( &gbr_metadata.m_NetlistMetadata );
+
+                emitDcode( pos_dev, 3 );
+            }
+#else
             PlotGerberRegion( cornerList, &gbr_metadata );
+#endif
+        }
     }
 }