glfw/lib/x11/x11_init.c

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2010-09-07 15:34:51 +00:00
//========================================================================
// GLFW - An OpenGL framework
// Platform: X11/GLX
2010-09-07 15:41:26 +00:00
// API version: 3.0
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// WWW: http://www.glfw.org/
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
#include "internal.h"
//************************************************************************
//**** GLFW internal functions ****
//************************************************************************
//========================================================================
// Dynamically load libraries
//========================================================================
static void initLibraries( void )
{
#ifdef _GLFW_DLOPEN_LIBGL
int i;
char *libGL_names[ ] =
{
"libGL.so",
"libGL.so.1",
"/usr/lib/libGL.so",
"/usr/lib/libGL.so.1",
NULL
};
_glfwLibrary.Libs.libGL = NULL;
for( i = 0; !libGL_names[ i ] != NULL; i ++ )
{
_glfwLibrary.Libs.libGL = dlopen( libGL_names[ i ],
RTLD_LAZY | RTLD_GLOBAL );
if( _glfwLibrary.Libs.libGL )
break;
}
#endif
}
//========================================================================
// Terminate GLFW when exiting application
//========================================================================
static void glfw_atexit( void )
{
glfwTerminate();
}
//========================================================================
// Initialize X11 display
//========================================================================
static int initDisplay( void )
{
// Open display
_glfwLibrary.display = XOpenDisplay( 0 );
if( !_glfwLibrary.display )
{
fprintf(stderr, "Failed to open X display\n");
return GL_FALSE;
}
// Check for XF86VidMode extension
#ifdef _GLFW_HAS_XF86VIDMODE
_glfwLibrary.XF86VidMode.available =
XF86VidModeQueryExtension( _glfwLibrary.display,
&_glfwLibrary.XF86VidMode.eventBase,
&_glfwLibrary.XF86VidMode.errorBase);
#else
_glfwLibrary.XF86VidMode.available = 0;
#endif
// Check for XRandR extension
#ifdef _GLFW_HAS_XRANDR
_glfwLibrary.XRandR.available =
XRRQueryExtension( _glfwLibrary.display,
&_glfwLibrary.XRandR.eventBase,
&_glfwLibrary.XRandR.errorBase );
#else
_glfwLibrary.XRandR.available = 0;
#endif
// Fullscreen & screen saver settings
// Check if GLX is supported on this display
if( !glXQueryExtension( _glfwLibrary.display, NULL, NULL ) )
{
fprintf(stderr, "GLX not supported\n");
return GL_FALSE;
}
// Retrieve GLX version
if( !glXQueryVersion( _glfwLibrary.display,
&_glfwLibrary.glxMajor,
&_glfwLibrary.glxMinor ) )
{
fprintf(stderr, "Unable to query GLX version\n");
return GL_FALSE;
}
return GL_TRUE;
}
//========================================================================
// Terminate X11 display
//========================================================================
static void terminateDisplay( void )
{
// Open display
if( _glfwLibrary.display )
{
XCloseDisplay( _glfwLibrary.display );
_glfwLibrary.display = NULL;
}
}
//************************************************************************
//**** Platform implementation functions ****
//************************************************************************
//========================================================================
// Initialize various GLFW state
//========================================================================
int _glfwPlatformInit( void )
{
if( !initDisplay() )
return GL_FALSE;
// Try to load libGL.so if necessary
initLibraries();
// Install atexit() routine
atexit( glfw_atexit );
// Initialize joysticks
_glfwInitJoysticks();
// Start the timer
_glfwInitTimer();
return GL_TRUE;
}
//========================================================================
// Close window and shut down library
//========================================================================
int _glfwPlatformTerminate( void )
{
// Close OpenGL window
glfwCloseWindow();
// Terminate display
terminateDisplay();
// Terminate joysticks
_glfwTerminateJoysticks();
// Unload libGL.so if necessary
#ifdef _GLFW_DLOPEN_LIBGL
if( _glfwLibrary.Libs.libGL != NULL )
{
dlclose( _glfwLibrary.Libs.libGL );
_glfwLibrary.Libs.libGL = NULL;
}
#endif
return GL_TRUE;
}