src/screen.h

   1 #ifndef _SCREEN_H
   2 #define _SCREEN_H
   3
   4 #include <SDL.h>
   5
   6 #include <functional>
   7
   8 namespace IPDF
   9 {
  10         /*
  11          * The "Screen" class handles managing the OS window (using SDL2).
  12          */
  13         class Screen
  14         {
  15         public:
  16                 Screen();
  17                 ~Screen();
  18
  19                 // 'Pumps' the system event queue.
  20                 // Returns 'false' if the program should quit.
  21                 bool PumpEvents();
  22
  23                 // Finishes rendering a frame, and presents it on the screen.
  24                 void Present();
  25
  26                 // Get the current width/height of the window's viewport.
  27                 int ViewportWidth() const { return m_viewport_width; }
  28                 int ViewportHeight() const { return m_viewport_height; }
  29
  30                 // Handle mouse input.
  31                 typedef std::function<void(int x, int y, int button, int wheel)> MouseHandler;
  32                 void SetMouseHandler(MouseHandler handler)
  33                 {
  34                         m_mouse_handler = handler;
  35                 }
  36
  37                 enum MouseCursors
  38                 {
  39                         CursorArrow,
  40                         CursorWait,
  41                         CursorWaitArrow,
  42                         CursorMove,
  43                         CursorHand
  44                 };
  45                 void SetMouseCursor(MouseCursors cursor);
  46
  47                 void ScreenShot(const char * filename) const;
  48                 void RenderBMP(const char * filename) const;
  49         private:
  50                 void ResizeViewport(int width, int height);
  51
  52                 MouseHandler m_mouse_handler;
  53                 int m_last_mouse_x;
  54                 int m_last_mouse_y;
  55
  56                 int m_viewport_width;
  57                 int m_viewport_height;
  58                 SDL_Window *m_window;
  59                 SDL_GLContext m_gl_context;
  60         };
  61
  62 }
  63
  64 #endif // _SCREEN_H