48 conversion constructors (#688)

src/internal/colors/Rgb48Color.cpp

@@ -33,6 +33,16 @@ License along with NeoPixel.  If not, see
 #include "HsbColor.h"
 #include "HtmlColor.h"
 
+#include "RgbwColor.h"
+#include "Rgbw64Color.h"
+
+Rgb48Color::Rgb48Color(const Rgbw64Color& color) :
+    R(color.R),
+    G(color.G),
+    B(color.B)
+{
+}
+
 Rgb48Color::Rgb48Color(const HslColor& color)
 {
     float r;

src/internal/colors/Rgb48Color.h

@@ -25,6 +25,8 @@ License along with NeoPixel.  If not, see
 -------------------------------------------------------------------------*/
 #pragma once
 
+struct Rgbw64Color; // forward declared
+
 // ------------------------------------------------------------------------
 // Rgb48Color represents a color object that is represented by Red, Green, Blue
 // component values.  It contains helpful color routines to manipulate the 
@@ -63,6 +65,19 @@ struct Rgb48Color : RgbColorBase
         B = (uint16_t)color.B * 257;
     };
 
+    // ------------------------------------------------------------------------
+    // explicitly Construct a Rgb48Color using RgbwColor
+    // ------------------------------------------------------------------------
+    explicit Rgb48Color(const RgbwColor& color)
+    {
+        *this = RgbColor(color);
+    }
+
+    // ------------------------------------------------------------------------
+    // explicitly Construct a Rgb48Color using Rgbw64Color
+    // ------------------------------------------------------------------------
+    explicit Rgb48Color(const Rgbw64Color& color);
+
     // ------------------------------------------------------------------------
     // Construct a Rgb48Color using HtmlColor
     // ------------------------------------------------------------------------

src/internal/colors/RgbColor.cpp

@@ -33,6 +33,7 @@ License along with NeoPixel.  If not, see
 #include "HslColor.h"
 #include "HsbColor.h"
 #include "HtmlColor.h"
+
 #include "RgbwColor.h"
 
 RgbColor::RgbColor(const RgbwColor& color) :