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Sample "Big Five" implementation for SDL_Surface

ulfben Oct 14th, 2017 (edited) 66 Never
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  1. #pragma once
  2. #include "SDL.h"
  3. class Text;
  4. class Surface{
  5. public:
  6.     Surface(Text& text);       
  7.     SDL_Surface* Surface::getSurface() const {
  8.         return _ptr;
  9.     }
  10.     //Destructor
  11.     Surface::~Surface() noexcept {
  12.         destroy();
  13.     }
  14.     // Copy constructor
  15.     Surface(const Surface& other){
  16.         _ptr = other.getSurface();
  17.         if (_ptr) {
  18.             _ptr->refcount++;
  19.         }      
  20.     }
  21.     // Move constructor
  22.     Surface(Surface&& other) noexcept {
  23.         _ptr = other._ptr;
  24.         other._ptr = nullptr;                          
  25.     }
  26.     // Copy assignment operator
  27.     Surface& operator= (const Surface& other){
  28.         destroy();//delete previous value      
  29.         _ptr = other.getSurface();
  30.         if (_ptr) {
  31.             _ptr->refcount++;
  32.         }      
  33.         return *this;      
  34.     }
  35.     // Move assignment operator
  36.     Surface& operator= (Surface&& other) noexcept {    
  37.         destroy();
  38.         _ptr = other.getSurface();
  39.         other._ptr = nullptr;      
  40.         return *this;
  41.     }
  42. protected:
  43.     void destroy() noexcept {
  44.         if (_ptr) {
  45.             SDL_FreeSurface(_ptr);
  46.             _ptr = nullptr;
  47.         }
  48.     }
  49. private:
  50.     SDL_Surface* _ptr = nullptr;
  51. };
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