Different approach to coloring netname labels.

include/gal/color4d.h

@@ -82,9 +82,9 @@ public:
      */
     COLOR4D& Highlight( double aFactor )
     {
-        r = (double) r * (1.0 - aFactor) + aFactor;
-        g = (double) g * (1.0 - aFactor) + aFactor;
-        b = (double) b * (1.0 - aFactor) + aFactor;
+        r = r * ( 1.0 - aFactor ) + aFactor;
+        g = g * ( 1.0 - aFactor ) + aFactor;
+        b = b * ( 1.0 - aFactor ) + aFactor;
 
         return *this;
     }
@@ -97,9 +97,23 @@ public:
      */
     COLOR4D& Darken( double aFactor )
     {
-        r = (double) r * (1.0 - aFactor);
-        g = (double) g * (1.0 - aFactor);
-        b = (double) b * (1.0 - aFactor);
+        r = r * ( 1.0 - aFactor );
+        g = g * ( 1.0 - aFactor );
+        b = b * ( 1.0 - aFactor );
+
+        return *this;
+    }
+
+    /**
+     * Function Invert
+     * Makes the color inverted, alpha remains the same.
+     * @return COLOR4D& Inverted color.
+     */
+    COLOR4D& Invert()
+    {
+        r = ( 1.0 - r );
+        g = ( 1.0 - g );
+        b = ( 1.0 - b );
 
         return *this;
     }
@@ -112,9 +126,9 @@ public:
      */
     COLOR4D Highlighted( double aFactor ) const
     {
-        return COLOR4D( r * (1.0 - aFactor) + aFactor,
-                        g * (1.0 - aFactor) + aFactor,
-                        b * (1.0 - aFactor) + aFactor,
+        return COLOR4D( r * ( 1.0 - aFactor ) + aFactor,
+                        g * ( 1.0 - aFactor ) + aFactor,
+                        b * ( 1.0 - aFactor ) + aFactor,
                         a );
     }
 
@@ -126,12 +140,22 @@ public:
      */
     COLOR4D Darkened( double aFactor ) const
     {
-        return COLOR4D( r * (1.0 - aFactor),
-                        g * (1.0 - aFactor),
-                        b * (1.0 - aFactor),
+        return COLOR4D( r * ( 1.0 - aFactor ),
+                        g * ( 1.0 - aFactor ),
+                        b * ( 1.0 - aFactor ),
                         a );
     }
 
+    /**
+     * Function Inverted
+     * Returns an inverted color, alpha remains the same.
+     * @return COLOR4D& Inverted color.
+     */
+    COLOR4D Inverted() const
+    {
+        return COLOR4D( 1.0 - r, 1.0 - g, 1.0 - b, a );
+    }
+
     /**
      * Function GetBrightness
      * Returns the brightness value of the color ranged from 0.0 to 1.0.

pcbnew/pcb_painter.cpp

@@ -309,10 +309,12 @@ void PCB_PAINTER::draw( const TRACK* aTrack, int aLayer )
             // Set a proper color for the label
             color = getLayerColor( aTrack->GetLayer(), aTrack->GetNet(),
                                    aTrack->ViewIsHighlighted() );
+            COLOR4D labelColor = getLayerColor( aLayer, 0, aTrack->ViewIsHighlighted() );
+
             if( color.GetBrightness() > 0.5 )
-                m_gal->SetStrokeColor( color.Darkened( 0.8 ) );
+                m_gal->SetStrokeColor( labelColor.Inverted() );
             else
-                m_gal->SetStrokeColor( color.Highlighted( 0.8 ) );
+                m_gal->SetStrokeColor( labelColor );
 
             m_gal->SetLineWidth( width / 10.0 );
             m_gal->SetBold( false );
@@ -447,11 +449,12 @@ void PCB_PAINTER::draw( const D_PAD* aPad, int aLayer )
             // Set a proper color for the label
             color = getLayerColor( aPad->GetParent()->GetLayer(), aPad->GetNet(),
                                    aPad->ViewIsHighlighted() );
+            COLOR4D labelColor = getLayerColor( aLayer, 0, aPad->ViewIsHighlighted() );
 
             if( color.GetBrightness() > 0.5 )
-                m_gal->SetStrokeColor( color.Darkened( 0.8 ) );
+                m_gal->SetStrokeColor( labelColor.Inverted() );
             else
-                m_gal->SetStrokeColor( color.Highlighted( 0.8 ) );
+                m_gal->SetStrokeColor( labelColor );
 
             if( displayNetname && m_pcbSettings->m_padNumbers )
             {