Tvrtko Malkoc - day2 - exercise 01 & 02

exercise/01/color.cpp

@@ -0,0 +1,75 @@
+#include "stdafx.h"
+#include "color.h"
+
+namespace {
+  double to_allowed_color_range(double d)
+  {
+    return 
+      d < color::min_value ? color::min_value :
+      color::max_value < d ? color::max_value :
+      d;
+  }
+
+  int to_char_range(double d)
+  {
+    return static_cast<int>((color::rgb_color_depth - 1) * to_allowed_color_range(d));
+  }
+}
+
+color::color(double red, double green, double blue) : 
+  red_(to_allowed_color_range(red)), 
+  green_(to_allowed_color_range(green)), 
+  blue_(to_allowed_color_range(blue))
+{  }
+
+double color::get_red() const
+{
+  return red_;
+}
+
+double color::get_green() const
+{
+  return green_;
+}
+
+double color::get_blue() const
+{
+  return blue_;
+}
+
+void color::set_red(double red)
+{
+  red_ = to_allowed_color_range(red);
+}
+
+void color::set_green(double green)
+{
+  green_ = to_allowed_color_range(green);
+}
+
+void color::set_blue(double blue)
+{
+  blue_ = to_allowed_color_range(blue);
+}
+
+COLORREF color::get_color_ref() const
+{
+  return RGB(to_char_range(red_), to_char_range(green_), to_char_range(blue_));
+}
+
+double color::get_luminance() const
+{
+  return 
+    luminance_red * red_ +
+    luminance_green * green_ + 
+    luminance_blue * blue_;
+}
+
+bool operator==(const color& c1, const color& c2)
+{
+  const auto precision = 1. / color::rgb_color_depth;
+  return
+    std::fabs(c1.get_red() - c2.get_red()) < precision &&
+    std::fabs(c1.get_green() - c2.get_green()) < precision &&
+    std::fabs(c1.get_blue() - c2.get_blue()) < precision;
+}

exercise/01/color.h

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+#pragma once
+
+class color
+{
+public:
+  inline static const double min_value = 0.0;
+  inline static const double max_value = 1.0;
+
+  inline static const double rgb_color_depth = 256.;
+
+  inline static const double luminance_red = 0.2126;
+  inline static const double luminance_green = 0.7152;
+  inline static const double luminance_blue = 0.0722;
+
+  color(double red = 0.0, double green = 0.0, double blue = 0.0);
+  color(const color&) = default;
+  ~color() = default;
+
+  double get_red() const;
+  double get_green() const;
+  double get_blue() const;
+
+  void set_red(double red);
+  void set_green(double green);
+  void set_blue(double blue);
+
+  COLORREF get_color_ref() const;
+  double get_luminance() const;
+
+private:
+  double red_;
+  double green_;
+  double blue_;
+};
+
+bool operator==(const color& c1, const color& c2);
+

exercise/01/color_test.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28010.2036
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "color_test", "color_test.vcxproj", "{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}.Debug|x64.ActiveCfg = Debug|x64
+		{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}.Debug|x64.Build.0 = Debug|x64
+		{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}.Debug|x86.ActiveCfg = Debug|Win32
+		{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}.Debug|x86.Build.0 = Debug|Win32
+		{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}.Release|x64.ActiveCfg = Release|x64
+		{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}.Release|x64.Build.0 = Release|x64
+		{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}.Release|x86.ActiveCfg = Release|Win32
+		{F6408CAA-4C86-4D98-8D13-9AF4DF77D23B}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {CCD529C8-1AD1-4C1F-A86F-966D32A353D9}
+	EndGlobalSection
+EndGlobal