source/window.cpp

   1 #include <vector>
   2 #include <GL/glx.h>
   3 #include <msp/core/error.h>
   4 #include "window.h"
   5
   6 using namespace std;
   7
   8 namespace Msp {
   9 namespace GLtk {
  10
  11 DisplayOptions::DisplayOptions():
  12         width(640),
  13         height(480),
  14         depth(24),
  15         alpha(false),
  16         doublebuffer(false),
  17         multisample(0),
  18         fullscreen(false)
  19 { }
  20
  21
  22 Window::Window(unsigned w, unsigned h)
  23 {
  24         DisplayOptions dopt;
  25         dopt.width=w;
  26         dopt.height=h;
  27
  28         init(dopt);
  29 }
  30
  31 Window::Window(const DisplayOptions &dopt)
  32 {
  33         init(dopt);
  34 }
  35
  36 Window::~Window()
  37 {
  38         XCloseDisplay(display);
  39 }
  40
  41 void Window::show()
  42 {
  43         XMapWindow(display, window);
  44 }
  45
  46 void Window::tick()
  47 {
  48         while(1)
  49         {
  50                 int pending=XPending(display);
  51                 if(pending==0)
  52                         break;
  53
  54                 for(int i=0; i<pending; ++i)
  55                 {
  56                         XEvent event;
  57                         XNextEvent(display, &event);
  58                         process_event(event);
  59                 }
  60         }
  61 }
  62
  63 void Window::init(const DisplayOptions &dopt)
  64 {
  65         options=dopt;
  66
  67         display=XOpenDisplay(0);
  68         if(!display)
  69                 throw Exception("Couldn't open X display");
  70
  71         vector<int> attribs;
  72         attribs.push_back(GLX_BUFFER_SIZE);
  73         attribs.push_back(dopt.depth);
  74         attribs.push_back(GLX_DOUBLEBUFFER);
  75         attribs.push_back(1);
  76         if(dopt.multisample>0)
  77         {
  78                 attribs.push_back(GLX_SAMPLE_BUFFERS_ARB);
  79                 attribs.push_back(dopt.multisample);
  80         }
  81
  82         XVisualInfo *visual=glXChooseVisual(display, DefaultScreen(display), &attribs.front());
  83         if(!visual)
  84                 throw Exception("Couldn't get a matching visual");
  85
  86         window=XCreateWindow(display, DefaultRootWindow(display), 0, 0, dopt.width, dopt.height, 0, CopyFromParent, InputOutput, visual->visual, 0, 0);
  87
  88         XSelectInput(display, window, ButtonPressMask|ButtonReleaseMask|MotionMask|KeyPressMask|KeyReleaseMask);
  89 }
  90
  91 void Window::process_event(const XEvent &event)
  92 {
  93         switch(event.type)
  94         {
  95         case ButtonPress:
  96                 signal_button_press.emit(event.button.x, event.button.y, event.button.button, event.button.state);
  97                 break;
  98         case ButtonRelease:
  99                 signal_button_release.emit(event.button.x, event.button.y, event.button.button, event.button.state);
 100                 break;
 101         case PointerMotion:
 102                 signal_pointer_motion.emit(event.motion.x, event.motion.y);
 103                 break;
 104         case KeyPress:
 105                 {
 106                         char buf[16];
 107                         XLookupString(event.key, buf, sizeof(buf), 0, 0);
 108                         // XXX Handle the result according to locale
 109                         signal_key_press.emit(event.key.keycode, event.key.state, buf[0]);
 110                 }
 111                 break;
 112         case KeyRelease:
 113                 signal_key_release.emit(event.key.keycode, event.key.state);
 114                 break;
 115         default:;
 116         }
 117 }
 118
 119 } // namespace GLtk
 120 } // namespace Msp