glfw/src/x11/x11_init.c

330 lines
10 KiB
C
Raw Normal View History

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
2010-09-07 15:34:51 +00:00
// 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"
#include <stdio.h>
#include <stdlib.h>
2010-09-07 15:34:51 +00:00
//========================================================================
// Dynamically load libraries
//========================================================================
2010-09-08 13:51:25 +00:00
static void initLibraries(void)
2010-09-07 15:34:51 +00:00
{
#ifdef _GLFW_DLOPEN_LIBGL
int i;
2010-09-08 13:58:43 +00:00
char* libGL_names[ ] =
2010-09-07 15:34:51 +00:00
{
"libGL.so",
"libGL.so.1",
"/usr/lib/libGL.so",
"/usr/lib/libGL.so.1",
NULL
};
2010-09-09 18:25:33 +00:00
_glfwLibrary.X11.libGL = NULL;
2010-09-08 13:51:25 +00:00
for (i = 0; libGL_names[i] != NULL; i++)
2010-09-07 15:34:51 +00:00
{
2010-09-09 18:25:33 +00:00
_glfwLibrary.X11.libGL = dlopen(libGL_names[i], RTLD_LAZY | RTLD_GLOBAL);
if (_glfwLibrary.X11.libGL)
2010-09-07 15:34:51 +00:00
break;
}
#endif
}
//========================================================================
// Initialize X11 display and look for supported X11 extensions
2010-09-07 15:34:51 +00:00
//========================================================================
static GLboolean initDisplay(void)
2010-09-07 15:34:51 +00:00
{
2010-09-09 16:15:32 +00:00
_glfwLibrary.X11.display = XOpenDisplay(0);
if (!_glfwLibrary.X11.display)
2010-09-07 15:34:51 +00:00
{
fprintf(stderr, "Failed to open X display\n");
_glfwSetError(GLFW_OPENGL_UNAVAILABLE);
2010-09-07 15:34:51 +00:00
return GL_FALSE;
}
// As the API currently doesn't understand multiple display devices, we hardcode
// this choice and hope for the best
_glfwLibrary.X11.screen = DefaultScreen(_glfwLibrary.X11.display);
_glfwLibrary.X11.root = RootWindow(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen);
2010-09-07 15:34:51 +00:00
// Check for XF86VidMode extension
#ifdef _GLFW_HAS_XF86VIDMODE
2010-09-09 16:15:32 +00:00
_glfwLibrary.X11.XF86VidMode.available =
XF86VidModeQueryExtension(_glfwLibrary.X11.display,
&_glfwLibrary.X11.XF86VidMode.eventBase,
&_glfwLibrary.X11.XF86VidMode.errorBase);
2010-09-07 15:34:51 +00:00
#else
_glfwLibrary.X11.XF86VidMode.available = GL_FALSE;
2010-09-07 15:34:51 +00:00
#endif
// Check for XRandR extension
#ifdef _GLFW_HAS_XRANDR
2010-09-09 16:15:32 +00:00
_glfwLibrary.X11.XRandR.available =
XRRQueryExtension(_glfwLibrary.X11.display,
&_glfwLibrary.X11.XRandR.eventBase,
&_glfwLibrary.X11.XRandR.errorBase);
if (!XRRQueryVersion(_glfwLibrary.X11.display,
&_glfwLibrary.X11.XRandR.majorVersion,
&_glfwLibrary.X11.XRandR.minorVersion))
{
fprintf(stderr, "Unable to query RandR version number\n");
}
2010-09-07 15:34:51 +00:00
#else
_glfwLibrary.X11.XRandR.available = GL_FALSE;
2010-09-07 15:34:51 +00:00
#endif
// Check if GLX is supported on this display
2010-09-09 16:15:32 +00:00
if (!glXQueryExtension(_glfwLibrary.X11.display, NULL, NULL))
2010-09-07 15:34:51 +00:00
{
fprintf(stderr, "GLX not supported\n");
_glfwSetError(GLFW_OPENGL_UNAVAILABLE);
2010-09-07 15:34:51 +00:00
return GL_FALSE;
}
2010-09-09 16:15:32 +00:00
if (!glXQueryVersion(_glfwLibrary.X11.display,
&_glfwLibrary.X11.glxMajor,
&_glfwLibrary.X11.glxMinor))
2010-09-07 15:34:51 +00:00
{
fprintf(stderr, "Unable to query GLX version\n");
_glfwSetError(GLFW_OPENGL_UNAVAILABLE);
2010-09-07 15:34:51 +00:00
return GL_FALSE;
}
return GL_TRUE;
}
//========================================================================
// Detect gamma ramp support and save original gamma ramp, if available
//========================================================================
static void initGammaRamp(void)
{
#ifdef _GLFW_HAS_XRANDR
// RandR gamma support is only available with version 1.2 and above
if (_glfwLibrary.X11.XRandR.available &&
(_glfwLibrary.X11.XRandR.majorVersion > 1 ||
_glfwLibrary.X11.XRandR.majorVersion == 1 &&
_glfwLibrary.X11.XRandR.minorVersion >= 2))
{
// FIXME: Assumes that all monitors have the same size gamma tables
// This is reasonable as I suspect the that if they did differ, it
// would imply that setting the gamma size to an arbitary size is
// possible as well.
XRRScreenResources* rr = XRRGetScreenResources(_glfwLibrary.X11.display,
_glfwLibrary.X11.root);
_glfwLibrary.originalRampSize = XRRGetCrtcGammaSize(_glfwLibrary.X11.display,
rr->crtcs[0]);
if (!_glfwLibrary.originalRampSize)
{
// This is probably Nvidia RandR with broken gamma support
// Flag it as useless and try Xf86VidMode below, if available
_glfwLibrary.X11.XRandR.gammaBroken = GL_TRUE;
}
XRRFreeScreenResources(rr);
}
#endif
#if defined(_GLFW_HAS_XF86VIDMODE)
if (_glfwLibrary.X11.XF86VidMode.available &&
!_glfwLibrary.originalRampSize)
{
// Get the gamma size using XF86VidMode
XF86VidModeGetGammaRampSize(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
&_glfwLibrary.originalRampSize);
}
#endif
if (!_glfwLibrary.originalRampSize)
fprintf(stderr, "Gamma ramp setting unsupported\n");
// Save the original gamma ramp
2010-10-13 20:42:31 +00:00
_glfwPlatformGetGammaRamp(&_glfwLibrary.originalRamp);
}
//========================================================================
// Create a blank cursor (for locked mouse mode)
//========================================================================
static Cursor createNULLCursor(void)
{
Pixmap cursormask;
XGCValues xgc;
GC gc;
XColor col;
Cursor cursor;
// TODO: Add error checks
cursormask = XCreatePixmap(_glfwLibrary.X11.display, _glfwLibrary.X11.root, 1, 1, 1);
xgc.function = GXclear;
gc = XCreateGC(_glfwLibrary.X11.display, cursormask, GCFunction, &xgc);
XFillRectangle(_glfwLibrary.X11.display, cursormask, gc, 0, 0, 1, 1);
col.pixel = 0;
col.red = 0;
col.flags = 4;
cursor = XCreatePixmapCursor(_glfwLibrary.X11.display, cursormask, cursormask,
&col, &col, 0, 0);
XFreePixmap(_glfwLibrary.X11.display, cursormask);
XFreeGC(_glfwLibrary.X11.display, gc);
return cursor;
}
2010-09-07 15:34:51 +00:00
//========================================================================
// Terminate X11 display
//========================================================================
2010-09-08 13:51:25 +00:00
static void terminateDisplay(void)
2010-09-07 15:34:51 +00:00
{
if (_glfwLibrary.originalRampSize)
{
_glfwPlatformSetGammaRamp(&_glfwLibrary.originalRamp);
}
2010-09-09 16:15:32 +00:00
if (_glfwLibrary.X11.display)
2010-09-07 15:34:51 +00:00
{
_glfwPlatformSetGammaRamp(&_glfwLibrary.originalRamp);
2010-09-09 16:15:32 +00:00
XCloseDisplay(_glfwLibrary.X11.display);
_glfwLibrary.X11.display = NULL;
2010-09-07 15:34:51 +00:00
}
}
2010-09-15 14:44:43 +00:00
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
2010-09-07 15:34:51 +00:00
//========================================================================
// Initialize various GLFW state
//========================================================================
2010-09-08 13:51:25 +00:00
int _glfwPlatformInit(void)
2010-09-07 15:34:51 +00:00
{
2010-09-08 13:51:25 +00:00
if (!initDisplay())
2010-09-07 15:34:51 +00:00
return GL_FALSE;
initGammaRamp();
_glfwLibrary.X11.cursor = createNULLCursor();
2010-09-07 15:34:51 +00:00
// Try to load libGL.so if necessary
initLibraries();
_glfwInitJoysticks();
// Start the timer
_glfwInitTimer();
return GL_TRUE;
}
//========================================================================
// Close window and shut down library
//========================================================================
2010-09-08 13:51:25 +00:00
int _glfwPlatformTerminate(void)
2010-09-07 15:34:51 +00:00
{
if (_glfwLibrary.X11.cursor)
{
XFreeCursor(_glfwLibrary.X11.display, _glfwLibrary.X11.cursor);
_glfwLibrary.X11.cursor = (Cursor) 0;
}
2010-09-07 15:34:51 +00:00
terminateDisplay();
_glfwTerminateJoysticks();
// Unload libGL.so if necessary
#ifdef _GLFW_DLOPEN_LIBGL
2010-09-09 18:25:33 +00:00
if (_glfwLibrary.X11.libGL != NULL)
2010-09-07 15:34:51 +00:00
{
2010-09-09 18:25:33 +00:00
dlclose(_glfwLibrary.X11.libGL);
_glfwLibrary.X11.libGL = NULL;
2010-09-07 15:34:51 +00:00
}
#endif
return GL_TRUE;
}
2010-09-15 14:44:43 +00:00
2010-09-13 16:05:59 +00:00
//========================================================================
// Get the GLFW version string
//========================================================================
const char* _glfwPlatformGetVersionString(void)
{
const char* version = "GLFW " _GLFW_VERSION_FULL
#if defined(_GLFW_HAS_XRANDR)
" XRandR"
#endif
#if defined(_GLFW_HAS_XF86VIDMODE)
2010-09-13 16:05:59 +00:00
" Xf86VidMode"
2010-09-13 16:08:59 +00:00
#else
" (no mode switching support)"
2010-09-13 16:05:59 +00:00
#endif
#if defined(_GLFW_HAS_GLXGETPROCADDRESS)
" glXGetProcAddress"
#elif defined(_GLFW_HAS_GLXGETPROCADDRESSARB)
" glXGetProcAddressARB"
#elif defined(_GLFW_HAS_GLXGETPROCADDRESSEXT)
" glXGetProcAddressEXT"
#elif defined(_GLFW_DLOPEN_LIBGL)
" dlopen(libGL)"
2010-09-13 16:08:59 +00:00
#else
" (no OpenGL extension support)"
2010-09-13 16:05:59 +00:00
#endif
#if defined(_GLFW_USE_LINUX_JOYSTICKS)
" Linux joystick API"
2010-09-13 16:08:59 +00:00
#else
" (no joystick support)"
2010-09-13 16:05:59 +00:00
#endif
;
return version;
}