MAC alpha support

common/gr_basic.cpp

@@ -257,33 +257,39 @@ void SetPenMinWidth( int minwidth )
 }
 
 
-/* Routine de changement de couleurs et epaisseur de la plume courante */
+/**
+ * Function GRSetColorPen
+ * sets a pen style, width, color, and alpha into the given device context.
+*/
 void GRSetColorPen( wxDC* DC, int Color, int width, int style )
 {
-    Color &= MASKCOLOR;    // Pour 32 couleurs Max
-
     if( width < PenMinWidth )
         width = PenMinWidth;
 
     if( ForceBlackPen && Color != WHITE )
+    {
         Color = BLACK;
+    }
 
-    if( (lastcolor != Color) || (lastwidth != width) || (s_Last_Pen_Style != style)
-       || (lastDC != DC ) )
+    if(   lastcolor != Color
+       || lastwidth != width
+       || s_Last_Pen_Style != style
+       || lastDC != DC  )
     {
-        wxPen DrawPen;
-        DrawPen.SetColour(
-            ColorRefs[Color].m_Red,
-            ColorRefs[Color].m_Green,
-            ColorRefs[Color].m_Blue
-            );
+        wxPen       pen;
 
-        DrawPen.SetWidth( width );
-        DrawPen.SetStyle( style );
+        wxColour    wx_color = MakeColour( Color );
+
+        pen.SetColour( wx_color );
+        pen.SetWidth( width );
+        pen.SetStyle( style );
+
+        DC->SetPen( pen );
+
+        lastcolor = Color;
+        lastwidth = width;
+        lastDC = DC;
 
-//		if ( &DC->GetPen() != DrawPen )
-        DC->SetPen( DrawPen );
-        lastcolor = Color; lastwidth = width; lastDC = DC;
         s_Last_Pen_Style = style;
     }
 }
@@ -337,7 +343,11 @@ void GRMouseWarp( WinEDA_DrawPanel* panel, const wxPoint& pos )
 void GRSetDrawMode( wxDC* DC, int draw_mode )
 {
     if( draw_mode & GR_OR )
+#if defined(__WXMAC__) && wxMAC_USE_CORE_GRAPHICS
+        DC->SetLogicalFunction( wxCOPY );
+#else
         DC->SetLogicalFunction( wxOR );
+#endif
     else if( draw_mode & GR_XOR )
         DC->SetLogicalFunction( wxXOR );
     else if( draw_mode & GR_NXOR )
@@ -861,7 +871,9 @@ void GRSPoly( EDA_Rect* ClipBox, wxDC* DC, int n, int* Points, int Fill,
     }
     else
     {
-        startx = Points[n * 2 - 2]; starty = Points[n * 2 - 1];
+        startx = Points[n * 2 - 2];
+        starty = Points[n * 2 - 1];
+
         GRSetBrush( DC, Color );
         DC->DrawLines( n, (wxPoint*) Points );
     }

include/colors.h

@@ -11,12 +11,38 @@
 
 /* Definitions des Numeros des Couleurs ( palette de 32) */
 #define NBCOLOR             32
-#define MASKCOLOR 31	// masque pour bits significatifs
 
-/* bit indicateur d'affichage (vu / non vu) des items : (defini dans les valeurs des couleurs*/
-#define ITEM_NOT_SHOW 0x40000
-/* Definition du bit de surbrillance */
-#define HIGHT_LIGHT_FLAG 0x80000
+#define MASKCOLOR           31           ///< mask for color index into ColorRefs[]
+
+/// bit indicateur d'affichage (vu / non vu) des items : (defini dans les valeurs des couleurs
+#define ITEM_NOT_SHOW       (1<<18)         // 0x40000
+
+/// Definition du bit de surbrillance
+#define HIGHT_LIGHT_FLAG    (1<<19)         // 0x80000
+
+
+/**
+ * Function SetAlpha
+ * ORs in the alpha blend parameter in to a color index.
+ */
+static inline void SetAlpha( int* aColor, int aBlend )
+{
+    const int MASKALPHA = 0xFF;
+
+    *aColor = (*aColor & ~(MASKALPHA << 24)) | ((aBlend & MASKALPHA) << 24);
+}
+
+
+/**
+ * Function GetAlpha
+ * returns the alpha blend parameter from a color index.
+ */
+static inline int GetAlpha( int aColor )
+{
+    const int MASKALPHA = 0xFF;
+    return (aColor >> 24) & MASKALPHA;
+}
+
 
 enum EDA_Colors
 {
@@ -44,17 +70,22 @@ enum EDA_Colors
     DARKMAGENTA,
     DARKBROWN,
     LIGHTYELLOW,
-LASTCOLOR
+    LASTCOLOR
 };
 
-class StructColors
+
+struct StructColors
 {
-public:
-	unsigned char m_Blue, m_Green, m_Red, m_Numcolor;
+    unsigned char   m_Blue;
+    unsigned char   m_Green;
+    unsigned char   m_Red;
+    unsigned char   m_Numcolor;
+
     const wxChar*   m_Name;
     int             m_LightColor;
 };
 
+
 extern StructColors ColorRefs[NBCOLOR];
 #ifdef MAIN
 StructColors ColorRefs[NBCOLOR] =
@@ -87,4 +118,29 @@ StructColors ColorRefs[NBCOLOR]	=
 #endif /* ifdef MAIN */
 
 
+/**
+ * Function MakeColour
+ * returns a wxWidgets wxColor from a KICAD color index with alpha value.
+ * Note that alpha support is not available on every wxWidgets platform.  On
+ * such platform the behavior is the same as for wxALPHA_OPAQUE and that
+ * means the alpha value has no effect and will be ignored.  wxGtk 2.8.4 is
+ * not supporting alpha.
+ * @return wxColour - given a KICAD color index with alpha value
+ */
+static inline wxColour MakeColour( int aColor )
+{
+    int alpha = GetAlpha( aColor );
+
+    alpha = alpha ? alpha : wxALPHA_OPAQUE;
+
+    int ndx = aColor & MASKCOLOR;
+
+    return wxColour(
+                ColorRefs[ndx].m_Red,
+                ColorRefs[ndx].m_Green,
+                ColorRefs[ndx].m_Blue,
+                (unsigned char) alpha
+                );
+}
+
 #endif /* ifndef _COLORS_H */

pcbnew/class_track.cpp

@@ -670,9 +670,12 @@ void TRACK::Draw( WinEDA_DrawPanel* panel, wxDC* DC, int draw_mode, const wxPoin
         else
             color |= HIGHT_LIGHT_FLAG;
     }
+
     if( color & HIGHT_LIGHT_FLAG )
         color = ColorRefs[color & MASKCOLOR].m_LightColor;
 
+    SetAlpha( &color, 150 );
+
     zoom = panel->GetZoom();
 
     l_piste = m_Width >> 1;
@@ -682,6 +685,7 @@ void TRACK::Draw( WinEDA_DrawPanel* panel, wxDC* DC, int draw_mode, const wxPoin
         rayon = l_piste;
         if( rayon < zoom )
             rayon = zoom;
+
         GRCircle( &panel->m_ClipBox, DC, m_Start.x, m_Start.y, rayon, color );
         if( rayon > (4 * zoom) )
         {