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  1. #include <iostream>
  2. #include <chrono>
  3. using namespace std;
  4.  
  5. typedef std::chrono::high_resolution_clock Clock;
  6.  
  7. class Dimension
  8. {
  9. public:
  10. 	Dimension(int _X, int _Y)
  11. 	{
  12. 		mX = _X;
  13. 		mY = _Y;
  14. 	}
  15.  
  16. private:
  17. 	int mX;
  18. 	int mY;
  19. };
  20.  
  21. class Image
  22. {
  23. public:
  24. 	virtual void Draw() = 0;
  25. 	virtual Dimension GetDimensionInPixels() = 0;
  26.  
  27. protected:
  28. 	int dimensionX;
  29. 	int dimensionY;
  30. };
  31.  
  32. class PngImage : public Image
  33. {
  34. public:
  35. 	void Draw()
  36. 	{
  37. 	}
  38.  
  39. 	Dimension GetDimensionInPixels()
  40. 	{
  41. 		return Dimension(dimensionX, dimensionY);
  42. 	}
  43. };
  44.  
  45. class BitmapImage : public Image
  46. {
  47. public:
  48. 	void Draw()
  49. 	{
  50. 	}
  51.  
  52. 	Dimension GetDimensionInPixels()
  53. 	{
  54. 		return Dimension(dimensionX, dimensionY);
  55. 	}
  56. };
  57.  
  58. class TiffImage : public Image
  59. {
  60. public:
  61. 	void Draw()
  62. 	{
  63. 	}
  64.  
  65. 	Dimension GetDimensionInPixels()
  66. 	{
  67. 		return Dimension(dimensionX, dimensionY);
  68. 	}
  69. };
  70.  
  71. int main() {
  72.  
  73. 	Image* pImage = new TiffImage;
  74.  
  75. 	auto then = Clock::now();
  76.  
  77. 	// Call Draw 1000 times to make sure perf is visible
  78. 	for (int i = 0; i < 1000; ++i)
  79. 		pImage->Draw();
  80.  
  81. 	auto now = Clock::now();
  82.  
  83. 	cout << "Time taken: " 
  84.               << std::chrono::duration_cast<std::chrono::nanoseconds>(now - then).count()
  85.               << " nanoseconds" << endl;
  86.  
  87. 	return 0;
  88. }
Success #stdin #stdout 0s 3460KB
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Standard input is empty
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Time taken: 2613 nanoseconds
https://ideone.com/K9uGcj
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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