From 5b84b15ed2bdcb702c96fbd47e5cf5b5ce1ae6b7 Mon Sep 17 00:00:00 2001
From: Robert <Robert-Altner@t-online.de>
Date: Sun, 17 May 2020 15:11:53 +0200
Subject: [PATCH] Added color arithmetics

---
 SDLU/structures/Color.cpp | 82 ++++++++++++++++++++++++++++++++++
 SDLU/structures/Color.hpp | 93 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 175 insertions(+)

diff --git a/SDLU/structures/Color.cpp b/SDLU/structures/Color.cpp
index 7c8a829..bd57926 100644
--- a/SDLU/structures/Color.cpp
+++ b/SDLU/structures/Color.cpp
@@ -93,4 +93,86 @@ namespace sdlu
 
         return output;
     }
+
+    Color operator+(const Color& left, const Color& right)
+    {
+        return Color(left.r + right.r,
+            left.g + right.g,
+            left.b + right.b,
+            left.a + right.a);
+    }
+
+    Color operator-(const Color& left, const Color& right)
+    {
+        return Color(left.r - right.r,
+            left.g - right.g,
+            left.b - right.b,
+            left.a - right.a);
+    }
+
+    Color operator*(const Color& left, const Color& right)
+    {
+        return Color(left.r * right.r,
+            left.g * right.g,
+            left.b * right.b,
+            left.a * right.a);
+    }
+
+    Color operator/(const Color& left, const Color& right)
+    {
+        return Color(left.r / right.r,
+            left.g / right.g,
+            left.b / right.b,
+            left.a / right.a);
+    }
+
+    Color& operator+=(Color& left, const Color& right)
+    {
+        left.r += right.r;
+        left.g += right.g;
+        left.b += right.b;
+        left.a += right.a;
+
+        return left;
+    }
+
+    Color& operator-=(Color& left, const Color& right)
+    {
+        left.r -= right.r;
+        left.g -= right.g;
+        left.b -= right.b;
+        left.a -= right.a;
+
+        return left;
+    }
+
+    Color& operator*=(Color& left, const Color& right)
+    {
+        left.r *= right.r;
+        left.g *= right.g;
+        left.b *= right.b;
+        left.a *= right.a;
+
+        return left;
+    }
+
+    Color& operator/=(Color& left, const Color& right)
+    {
+        left.r /= right.r;
+        left.g /= right.g;
+        left.b /= right.b;
+        left.a /= right.a;
+
+        return left;
+    }
+
+    bool operator==(const Color& left, const Color& right)
+    {
+        return ((left.r == right.r) && (left.g == right.g) && (left.b == right.b) && (left.a == right.a));
+    }
+
+    bool operator!=(const Color& left, const Color& right)
+    {
+        return !(left == right);
+    }
 }
\ No newline at end of file
diff --git a/SDLU/structures/Color.hpp b/SDLU/structures/Color.hpp
index a1d1d51..e710d32 100644
--- a/SDLU/structures/Color.hpp
+++ b/SDLU/structures/Color.hpp
@@ -73,5 +73,98 @@ namespace sdlu
         static const Color White;         ///< Default Color White   (#FFFFFFFF)
         
         static const Color Transparent;   ///< Default Color Transparent (#00000000)
+
+
+        /////////////////// OPERATOR OVERLOADS ///////////////////
+
+        /**
+         * @brief Componentwise color addition
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return left + right
+         */
+        friend Color operator+(const Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color subtraction
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return left - right
+         */
+        friend Color operator-(const Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color multiplication
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return left * right
+         */
+        friend Color operator*(const Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color division
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return left / right
+         */
+        friend Color operator/(const Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color addition
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return left += right
+         */
+        friend Color& operator+=(Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color subtraction
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return left -= right
+         */
+        friend Color& operator-=(Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color multiplication
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return left *= right
+         */
+        friend Color& operator*=(Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color division
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return left /= right
+         */
+        friend Color& operator/=(Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color comparison
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return True if the respective color components are equal, False if not
+         */
+        friend bool operator==(const Color& left, const Color& right);
+
+        /**
+         * @brief Componentwise color comparison
+         *
+         * @param[in] left  Left operand
+         * @param[in] right Right operand
+         * @return False if the respective color components are equal, True if not
+         */
+        friend bool operator!=(const Color& left, const Color& right);
     };
 }
\ No newline at end of file