From 215ac3f6ab07bc74b0228d7377f0475857e7ed6c Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Fri, 7 Sep 2012 00:39:54 +0200
Subject: utils/rgb_color: add possibility to generate color array for opengl

---
 src/utils/rgb_color.cpp | 64 +++++++++++++++++++++++++++++++++++++++++++++++--
 src/utils/rgb_color.hpp | 13 ++++++++++
 2 files changed, 75 insertions(+), 2 deletions(-)

diff --git a/src/utils/rgb_color.cpp b/src/utils/rgb_color.cpp
index ea8327e1..2e8954c0 100644
--- a/src/utils/rgb_color.cpp
+++ b/src/utils/rgb_color.cpp
@@ -27,15 +27,47 @@
 namespace usdx
 {
 	RgbColor::RgbColor(int red, int green, int blue)
-		: red(red / 255.0f), green(green / 255.0f), blue(blue / 255.0f)
+		: red(red / 255.0f), green(green / 255.0f), blue(blue / 255.0f),
+		  array(NULL), array_length(0)
 	{
 	}
 
 	RgbColor::RgbColor(float red, float green, float blue)
-		: red(red), green(green), blue(blue)
+		: red(red), green(green), blue(blue), array(NULL), array_length(0)
 	{
 	}
 
+	RgbColor::RgbColor(const RgbColor& color)
+		: red(color.red), green(color.green), blue(color.blue), array(NULL),
+		  array_length(0)
+	{
+	}
+
+	RgbColor::~RgbColor()
+	{
+		if (array != NULL) {
+			delete[] array;
+			array = NULL;
+		}
+	}
+
+	RgbColor& RgbColor::operator=(const RgbColor& color)
+	{
+		if (this != &color) {
+			red = color.red;
+			green = color.green;
+			blue = color.blue;
+			array_length = 0;
+
+			if (array != NULL) {
+				delete[] array;
+				array = NULL;
+			}
+		}
+
+		return *this;
+	}
+
 	float RgbColor::get_red(void) const
 	{
 		return red;
@@ -50,4 +82,32 @@ namespace usdx
 	{
 		return blue;
 	}
+
+	const GLubyte* RgbColor::get_array(size_t len) const
+	{
+		if (array_length != len && array != NULL) {
+			delete[] array;
+			array = NULL;
+			array_length = 0;
+		}
+
+		if (array == NULL) {
+			int components = get_array_comonent_count();
+			array = new GLubyte[len * components];
+			array_length = len;
+
+			for (size_t i = 0; i < len; i++) {
+				array[i*components] = red * 255.0f;
+				array[(i*components) + 1] = green * 255.0f;
+				array[(i*components) + 2] = blue * 255.0f;
+			}
+		}
+
+		return array;
+	}
+
+	int RgbColor::get_array_comonent_count(void) const
+	{
+		return 3;
+	}
 };
diff --git a/src/utils/rgb_color.hpp b/src/utils/rgb_color.hpp
index 4c06e765..36a5b42c 100644
--- a/src/utils/rgb_color.hpp
+++ b/src/utils/rgb_color.hpp
@@ -25,6 +25,8 @@
 #ifndef RGB_COLOR_HPP
 #define RGB_COLOR_HPP
 
+#include <GL/gl.h>
+
 namespace usdx
 {
 	class RgbColor
@@ -33,13 +35,24 @@ namespace usdx
 		float red;
 		float green;
 		float blue;
+
+	protected:
+		mutable GLubyte *array;
+		mutable size_t array_length;
+
 	public:
 		RgbColor(int red, int green, int blue);
 		RgbColor(float red, float green, float blue);
+		RgbColor(const RgbColor& color);
+		virtual ~RgbColor();
+		RgbColor& operator=(const RgbColor& color);
 
 		float get_red(void) const;
 		float get_green(void) const;
 		float get_blue(void) const;
+
+		virtual const GLubyte* get_array(size_t len) const;
+		int get_array_comonent_count(void) const;
 	};
 };
 
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