C++ & SDL : No error but Images won't draw -

i have been following tutorial on sdl game development c++. , yesterday ran odd error. my image should drawn window. doesn't appear in form. i did bit of debugging , image in fact loaded program. won't draw. decided come today.

after digging, seem sdl rectangles used in game class problem. i figured out printing width of destination rectangle , came out 0. perhaps missed something. have pasted link project game class consists of header , cpp. can see went wrong?

https://app.box.com/s/fa7nvji36bulcmb36p72

not going gold medal programming, trying things work can continue rest of chapter.

any kindly appreciated. have posted code related image below.

---game.h---

#ifndef __game__  #define __game__  #include "sdl.h"  class game {     public:         game();         ~game();         bool init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen);         void render();         void update();         void maingameloop();         void clean();         void loadimages();         bool running();     private:         bool g_running;         sdl_window* window;         sdl_renderer* renderer;         sdl_texture* m_ptexture; // new sdl_texture variable         sdl_rect m_sourcerectangle; // first rectangle         sdl_rect m_destinationrectangle; // rectangle };  #endif /* defined(__game__) */ 

---game.cpp (extracts)---

void game::loadimages() //called in constructor (testing purposes) {     sdl_surface* ptempsurface = sdl_loadbmp("assets/sprites/rider.bmp"); //loads image      if (ptempsurface == null)         cout << "error" << endl;     else         cout << "image loaded" << endl;      m_ptexture = sdl_createtexturefromsurface(renderer, ptempsurface); //creates texture//check     sdl_freesurface(ptempsurface); //frees surface      sdl_querytexture(m_ptexture, null, null,&m_sourcerectangle.w, &m_sourcerectangle.h); //sets width , height of source rectangle     m_sourcerectangle.x = 0;     m_sourcerectangle.y = 0;      m_destinationrectangle.x = 0; //prepares destination , source co-ordinates     m_destinationrectangle.y = 0;     m_destinationrectangle.w = m_sourcerectangle.w;      m_destinationrectangle.h = m_sourcerectangle.h;      cout << m_destinationrectangle.w << endl; //proves problem here. }  void game::render() {     // set black     sdl_setrenderdrawcolor(renderer, 0, 0, 0, 255);     // clear window black     sdl_renderclear(renderer);      sdl_rendercopy(renderer, m_ptexture, &m_sourcerectangle,&m_destinationrectangle); //draws sprite      // show window     sdl_renderpresent(renderer); } 

perhaps else can see failing see.

the error isn't think @ all, due fact thegame::loadimagesfunction executed before sdl , rendering context have been initialized, when try load create texture surface, renderer invalid. if had checked return value thesdl_createtexturefromsurface()call sdl_error()function have told that.

what need either move call game::init() have in main constructor of game class, or maybe move call game::loadimages() to game::init() function.

in case need initialize sdl before start load images.