Gerber files generation: fix a rounding issue when drawing circles. (explains bug Bug #1339086 ).

Gerbview: allows x.7 format (recently indroduced in Gerber format)
Also minor coding style fixes.

common/common_plotGERBER_functions.cpp

@@ -356,14 +356,17 @@ void GERBER_PLOTTER::Arc( const wxPoint& aCenter, double aStAngle, double aEndAn
     DPOINT devEnd = userToDeviceCoordinates( end );
     DPOINT devCenter = userToDeviceCoordinates( aCenter )
         - userToDeviceCoordinates( start );
+
     fprintf( outputFile, "G75*\n" ); // Multiquadrant mode
 
     if( aStAngle < aEndAngle )
         fprintf( outputFile, "G03" );
     else
         fprintf( outputFile, "G02" );
-    fprintf( outputFile, "X%dY%dI%dJ%dD01*\n", int( devEnd.x ), int( devEnd.y ),
+
-             int( devCenter.x ), int( devCenter.y ) );
+    fprintf( outputFile, "X%dY%dI%dJ%dD01*\n",
+             KiROUND( devEnd.x ), KiROUND( devEnd.y ),
+             KiROUND( devCenter.x ), KiROUND( devCenter.y ) );
     fprintf( outputFile, "G74*\nG01*\n" ); // Back to single quadrant and linear interp.
 }
 

gerbview/rs274_read_XY_and_IJ_coordinates.cpp

@@ -19,25 +19,24 @@
 // depending on the gerber file format
 // this scale list assumes gerber units are imperial.
 // for metric gerber units, the imperial to metric conversion is made in read functions
-static double scale_list[10] =
+#define SCALE_LIST_SIZE 10
+static double scale_list[SCALE_LIST_SIZE] =
 {
-    1000.0 * IU_PER_MILS,
+    1000.0 * IU_PER_MILS,   // x.1 format (certainly useless)
-    100.0 * IU_PER_MILS,
+    100.0 * IU_PER_MILS,    // x.2 format (certainly useless)
-    10.0 * IU_PER_MILS,
+    10.0 * IU_PER_MILS,     // x.3 format
-    1.0 * IU_PER_MILS,
+    1.0 * IU_PER_MILS,      // x.4 format
-    0.1 * IU_PER_MILS,
+    0.1 * IU_PER_MILS,      // x.5 format
-    0.01 * IU_PER_MILS,
+    0.01 * IU_PER_MILS,     // x.6 format
-    0.001 * IU_PER_MILS,
+    0.0001 * IU_PER_MILS,   // x.7 format
-    0.0001 * IU_PER_MILS,
+    0.00001 * IU_PER_MILS,  // provided, but not used
-    0.00001 * IU_PER_MILS,
     0.000001 * IU_PER_MILS
 };
 
-
+/*
-/**
  * Function scale
- * converts a distance given in floating point to our internal units
+ * converts a coordinate given in floating point to Gerbvies internal units
- * (deci-mils or nano units)
+ * (currently = 10 nanometers)
  */
 int scaletoIU( double aCoord, bool isMetric )
 {
@@ -78,6 +77,7 @@ wxPoint GERBER_IMAGE::ReadXYCoord( char*& Text )
             Text++;
             text     = line;
             nbdigits = 0;
+
             while( IsNumber( *Text ) )
             {
                 if( *Text == '.' )  // Force decimat format if reading a floating point number
@@ -90,6 +90,7 @@ wxPoint GERBER_IMAGE::ReadXYCoord( char*& Text )
             }
 
             *text = 0;
+
             if( is_float )
             {
                 // When X or Y values are float numbers, they are given in mm or inches
@@ -101,6 +102,7 @@ wxPoint GERBER_IMAGE::ReadXYCoord( char*& Text )
             else
             {
                 int fmt_scale = (type_coord == 'X') ? m_FmtScale.x : m_FmtScale.y;
+
                 if( m_NoTrailingZeros )
                 {
                     int min_digit =
@@ -113,6 +115,7 @@ wxPoint GERBER_IMAGE::ReadXYCoord( char*& Text )
 
                     *text = 0;
                 }
+
                 current_coord = atoi( line );
                 double real_scale = scale_list[fmt_scale];
 
@@ -177,6 +180,7 @@ wxPoint GERBER_IMAGE::ReadIJCoord( char*& Text )
                 // count digits only (sign and decimal point are not counted)
                 if( (*Text >= '0') && (*Text <='9') )
                     nbdigits++;
+
                 *(text++) = *(Text++);
             }
 
@@ -193,6 +197,7 @@ wxPoint GERBER_IMAGE::ReadIJCoord( char*& Text )
             {
                 int fmt_scale =
                     (type_coord == 'I') ? m_FmtScale.x : m_FmtScale.y;
+
                 if( m_NoTrailingZeros )
                 {
                     int min_digit =
@@ -205,20 +210,21 @@ wxPoint GERBER_IMAGE::ReadIJCoord( char*& Text )
 
                     *text = 0;
                 }
+
                 current_coord = atoi( line );
 
-                if( fmt_scale < 0 || fmt_scale > 9 )
-                    fmt_scale = 4;      // select scale 1.0
-
                 double real_scale = scale_list[fmt_scale];
+
                 if( m_GerbMetric )
                     real_scale = real_scale / 25.4;
+
                 current_coord = KiROUND( current_coord * real_scale );
             }
             if( type_coord == 'I' )
                 pos.x = current_coord;
             else if( type_coord == 'J' )
                 pos.y = current_coord;
+
             continue;
         }
         else
@@ -246,8 +252,10 @@ int ReadInt( char*& text, bool aSkipSeparator = true )
     int ret = (int) strtol( text, &text, 10 );
 
     if( *text == ',' || isspace( *text ) )
+    {
         if( aSkipSeparator )
             ++text;
+    }
 
     return ret;
 }
@@ -267,8 +275,10 @@ double ReadDouble( char*& text, bool aSkipSeparator = true )
     double ret = strtod( text, &text );
 
     if( *text == ',' || isspace( *text ) )
+    {
         if( aSkipSeparator )
             ++text;
+    }
 
     return ret;
 }

gerbview/rs274d.cpp

@@ -222,7 +222,6 @@ static void fillArcGBRITEM(  GERBER_DRAW_ITEM* aGbrItem, int Dcode_index, int aL
     aGbrItem->m_Size  = aPenSize;
     aGbrItem->m_Flashed = false;
 
-
     if( aMultiquadrant )
         center = aStart + aRelCenter;
     else

gerbview/rs274x.cpp

@@ -235,15 +235,16 @@ bool GERBER_IMAGE::ExecuteRS274XCommand( int       command,
                 if( code == 'X' )
                 {
                     x_fmt_known = true;
-                    // number of digits after the decimal point (0 to 6 allowed)
+                    // number of digits after the decimal point (0 to 7 allowed)
                     m_FmtScale.x = *text - '0';
                     m_FmtLen.x   = ctmp + m_FmtScale.x;
 
-                    // m_FmtScale is 0 to 6
+                    // m_FmtScale is 0 to 7
+                    // (Old Gerber specification was 0 to 6)
                     if( m_FmtScale.x < 0 )
                         m_FmtScale.x = 0;
-                    if( m_FmtScale.x > 6 )
+                    if( m_FmtScale.x > 7 )
-                        m_FmtScale.x = 6;
+                        m_FmtScale.x = 7;
                 }
                 else
                 {
@@ -252,8 +253,8 @@ bool GERBER_IMAGE::ExecuteRS274XCommand( int       command,
                     m_FmtLen.y   = ctmp + m_FmtScale.y;
                     if( m_FmtScale.y < 0 )
                         m_FmtScale.y = 0;
-                    if( m_FmtScale.y > 6 )
+                    if( m_FmtScale.y > 7 )
-                        m_FmtScale.y = 6;
+                        m_FmtScale.y = 7;
                 }
                 text++;
             }