source/glwindow.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgbase
   4 Copyright © 2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <vector>
   9 #include <msp/core/error.h>
  10 #include "glwindow.h"
  11
  12 using namespace std;
  13
  14 #include <iostream>
  15
  16 namespace Msp {
  17
  18 GLDisplayOptions::GLDisplayOptions():
  19         alpha(false),
  20         doublebuffer(true),
  21         multisample(0)
  22 { }
  23
  24
  25 GLWindow::GLWindow(unsigned w, unsigned h)
  26 {
  27         options.width=w;
  28         options.height=h;
  29         init();
  30 }
  31
  32 GLWindow::GLWindow(const DisplayOptions &dopt, const GLDisplayOptions &gl_dopt)
  33 {
  34         options=dopt;
  35         gl_options=gl_dopt;
  36         init();
  37 }
  38
  39 GLWindow::~GLWindow()
  40 {
  41         glXMakeCurrent(display, window, 0);
  42         glXDestroyContext(display, context);
  43 }
  44
  45 void GLWindow::swap_buffers()
  46 {
  47         glXSwapBuffers(display, window);
  48 }
  49
  50 void GLWindow::init()
  51 {
  52         prepare();
  53
  54         vector<int> attribs;
  55         attribs.push_back(GLX_RGBA);
  56         attribs.push_back(GLX_BUFFER_SIZE);
  57         attribs.push_back(24);
  58         if(gl_options.alpha)
  59         {
  60                 attribs.push_back(GLX_ALPHA_SIZE);
  61                 attribs.push_back(1);
  62         }
  63         if(gl_options.doublebuffer)
  64                 attribs.push_back(GLX_DOUBLEBUFFER);
  65         if(gl_options.multisample>0)
  66         {
  67                 attribs.push_back(GLX_SAMPLE_BUFFERS_ARB);
  68                 attribs.push_back(gl_options.multisample);
  69         }
  70         attribs.push_back(0);
  71
  72         XVisualInfo *visual=glXChooseVisual(display, DefaultScreen(display), &attribs.front());
  73         if(!visual)
  74                 throw Exception("Couldn't get a matching GLX visual");
  75
  76         context=glXCreateContext(display, visual, 0, true);
  77         if(!context)
  78                 throw Exception("Couldn't create a GLX context");
  79
  80         window=XCreateWindow(display, DefaultRootWindow(display), 0, 0, options.width, options.height, 0, CopyFromParent, InputOutput, CopyFromParent, 0, 0);
  81         if(!window)
  82                 throw Exception("Couldn't create a window");
  83
  84         XSelectInput(display, window, ButtonPressMask|ButtonReleaseMask|PointerMotionMask|KeyPressMask|KeyReleaseMask);
  85
  86         glXMakeCurrent(display, window, context);
  87 }
  88
  89 } // namespace Msp