Added trgb struct

src/iomanip.cpp

@@ -1,5 +1,6 @@
 #include "iomanip.hpp"
 #include <unistd.h>
+#include <cmath>
 
 using namespace sc::io;
 
@@ -225,3 +226,14 @@ sc::io::rgbb::rgbb(int r, int g, int b) :
 std::ostream& sc::io::operator<<(std::ostream &out, const rgbb& obj) {
     return rgb(out, obj._r, obj._g, obj._b, 48);
 }
+
+sc::io::trgb::trgb(double r, double g, double b) : _r {r}, _g {g}, _b {b} {}
+
+sc::io::trgb::operator rgbf() {
+    rgbf result {
+        static_cast<int>(floor(_r * 5)),
+        static_cast<int>(floor(_g * 5)),
+        static_cast<int>(floor(_b * 5))
+    };
+    return result;
+}

src/iomanip.hpp

@@ -54,17 +54,17 @@ namespace sc {
         };
 
         struct rgbf {
-            int _r;
-            int _g;
-            int _b;
+            int _r; // 0 .. 5
+            int _g; // 0 .. 5
+            int _b; // 0 .. 5
 
             rgbf(int r, int g, int b);
         };
 
         struct rgbb {
-            int _r;
-            int _g;
-            int _b;
+            int _r; // 0 .. 5
+            int _g; // 0 .. 5
+            int _b; // 0 .. 5
 
             rgbb(int r, int g, int b);
         };
@@ -73,6 +73,24 @@ namespace sc {
         std::ostream& operator<<(std::ostream& out, const grayb& obj);
         std::ostream& operator<<(std::ostream& out, const rgbf& obj);
         std::ostream& operator<<(std::ostream& out, const rgbb& obj);
+
+        struct trgb {
+            double _r; // 0.0 .. 1.0
+            double _g; // 0.0 .. 1.0
+            double _b; // 0.0 .. 1.0
+
+            trgb(double r, double g, double b);
+            operator rgbf();
+        };
+
+        const trgb black   {0.0, 0.0, 0.0};
+        const trgb red     {1.0, 0.0, 0.0};
+        const trgb green   {0.0, 1.0, 0.0};
+        const trgb yellow  {1.0, 1.0, 0.0};
+        const trgb blue    {0.0, 0.0, 1.0};
+        const trgb magenta {1.0, 0.0, 1.0};
+        const trgb cyan    {0.0, 1.0, 1.0};
+        const trgb white   {1.0, 1.0, 1.0};
     }
 }