// Create a blank cursor (for locked mouse mode)
//
static Cursor createNULLCursor(void)
{
Pixmap cursormask;
XGCValues xgc;
GC gc;
XColor col;
Cursor cursor;
_glfwGrabXErrorHandler();
cursormask = XCreatePixmap(_glfw.x11.display, _glfw.x11.root, 1, 1, 1);
xgc.function = GXclear;
gc = XCreateGC(_glfw.x11.display, cursormask, GCFunction, &xgc);
XFillRectangle(_glfw.x11.display, cursormask, gc, 0, 0, 1, 1);
col.pixel = 0;
col.red = 0;
col.flags = 4;
cursor = XCreatePixmapCursor(_glfw.x11.display,
cursormask, cursormask,
&col, &col, 0, 0);
XFreePixmap(_glfw.x11.display, cursormask);
XFreeGC(_glfw.x11.display, gc);
_glfwReleaseXErrorHandler();
if (cursor == None)
{
_glfwInputXError(GLFW_PLATFORM_ERROR,
"X11: Failed to create null cursor");
}
return cursor;
}
// Check whether the running window manager is EWMH-compliant
//
static void detectEWMH(void)
{
Window* windowFromRoot = NULL;
Window* windowFromChild = NULL;
// First we need a couple of atoms, which should already be there
Atom supportingWmCheck =
XInternAtom(_glfw.x11.display, "_NET_SUPPORTING_WM_CHECK", True);
Atom wmSupported =
XInternAtom(_glfw.x11.display, "_NET_SUPPORTED", True);
if (supportingWmCheck == None || wmSupported == None)
return;
// Then we look for the _NET_SUPPORTING_WM_CHECK property of the root window
if (_glfwGetWindowProperty(_glfw.x11.root,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromRoot) != 1)
{
if (windowFromRoot)
XFree(windowFromRoot);
return;
}
_glfwGrabXErrorHandler();
// It should be the ID of a child window (of the root)
// Then we look for the same property on the child window
if (_glfwGetWindowProperty(*windowFromRoot,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromChild) != 1)
{
XFree(windowFromRoot);
if (windowFromChild)
XFree(windowFromChild);
return;
}
_glfwReleaseXErrorHandler();
// It should be the ID of that same child window
if (*windowFromRoot != *windowFromChild)
{
XFree(windowFromRoot);
XFree(windowFromChild);
return;
}
XFree(windowFromRoot);
XFree(windowFromChild);
// We are now fairly sure that an EWMH-compliant window manager is running
Atom* supportedAtoms;
unsigned long atomCount;
// Now we need to check the _NET_SUPPORTED property of the root window
// It should be a list of supported WM protocol and state atoms
atomCount = _glfwGetWindowProperty(_glfw.x11.root,
wmSupported,
XA_ATOM,
(unsigned char**) &supportedAtoms);
// See which of the atoms we support that are supported by the WM
_glfw.x11.NET_WM_STATE =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE");
_glfw.x11.NET_WM_STATE_ABOVE =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_ABOVE");
_glfw.x11.NET_WM_STATE_FULLSCREEN =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
_glfw.x11.NET_WM_FULLSCREEN_MONITORS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_FULLSCREEN_MONITORS");
_glfw.x11.NET_WM_NAME =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_NAME");
_glfw.x11.NET_WM_ICON_NAME =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_ICON_NAME");
_glfw.x11.NET_WM_PID =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_PID");
_glfw.x11.NET_WM_PING =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_PING");
_glfw.x11.NET_ACTIVE_WINDOW =
getSupportedAtom(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
_glfw.x11.NET_FRAME_EXTENTS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_FRAME_EXTENTS");
_glfw.x11.NET_REQUEST_FRAME_EXTENTS =
getSupportedAtom(supportedAtoms, atomCount, "_NET_REQUEST_FRAME_EXTENTS");
_glfw.x11.NET_WM_BYPASS_COMPOSITOR =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_BYPASS_COMPOSITOR");
XFree(supportedAtoms);
}
// Create the X11 window (and its colormap)
//
static GLboolean createWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig)
{
unsigned long wamask;
XSetWindowAttributes wa;
XVisualInfo* visual = _GLFW_X11_CONTEXT_VISUAL;
// Every window needs a colormap
// Create one based on the visual used by the current context
// TODO: Decouple this from context creation
window->x11.colormap = XCreateColormap(_glfw.x11.display,
_glfw.x11.root,
visual->visual,
AllocNone);
// Create the actual window
{
wamask = CWBorderPixel | CWColormap | CWEventMask;
wa.colormap = window->x11.colormap;
wa.border_pixel = 0;
wa.event_mask = StructureNotifyMask | KeyPressMask | KeyReleaseMask |
PointerMotionMask | ButtonPressMask | ButtonReleaseMask |
ExposureMask | FocusChangeMask | VisibilityChangeMask |
EnterWindowMask | LeaveWindowMask | PropertyChangeMask;
if (wndconfig->monitor == NULL)
{
// HACK: This is a workaround for windows without a background pixel
// not getting any decorations on certain older versions of
// Compiz running on Intel hardware
wa.background_pixel = BlackPixel(_glfw.x11.display,
_glfw.x11.screen);
wamask |= CWBackPixel;
}
_glfwGrabXErrorHandler();
window->x11.handle = XCreateWindow(_glfw.x11.display,
_glfw.x11.root,
0, 0,
wndconfig->width, wndconfig->height,
0, // Border width
visual->depth, // Color depth
InputOutput,
visual->visual,
wamask,
&wa);
_glfwReleaseXErrorHandler();
if (!window->x11.handle)
{
_glfwInputXError(GLFW_PLATFORM_ERROR,
"X11: Failed to create window");
return GL_FALSE;
}
if (!wndconfig->decorated)
{
MotifWmHints hints;
hints.flags = MWM_HINTS_DECORATIONS;
hints.decorations = 0;
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.MOTIF_WM_HINTS,
_glfw.x11.MOTIF_WM_HINTS, 32,
PropModeReplace,
(unsigned char*) &hints,
sizeof(MotifWmHints) / sizeof(long));
}
XSaveContext(_glfw.x11.display,
window->x11.handle,
_glfw.x11.context,
(XPointer) window);
}
if (window->monitor && !_glfw.x11.hasEWMH)
{
// This is the butcher's way of removing window decorations
// Setting the override-redirect attribute on a window makes the window
// manager ignore the window completely (ICCCM, section 4)
// The good thing is that this makes undecorated fullscreen windows
// easy to do; the bad thing is that we have to do everything manually
// and some things (like iconify/restore) won't work at all, as those
// are tasks usually performed by the window manager
XSetWindowAttributes attributes;
attributes.override_redirect = True;
XChangeWindowAttributes(_glfw.x11.display,
window->x11.handle,
CWOverrideRedirect,
&attributes);
window->x11.overrideRedirect = GL_TRUE;
}
// Declare the WM protocols supported by GLFW
{
int count = 0;
Atom protocols[2];
// The WM_DELETE_WINDOW ICCCM protocol
// Basic window close notification protocol
if (_glfw.x11.WM_DELETE_WINDOW)
protocols[count++] = _glfw.x11.WM_DELETE_WINDOW;
// The _NET_WM_PING EWMH protocol
// Tells the WM to ping the GLFW window and flag the application as
// unresponsive if the WM doesn't get a reply within a few seconds
if (_glfw.x11.NET_WM_PING)
protocols[count++] = _glfw.x11.NET_WM_PING;
if (count > 0)
{
XSetWMProtocols(_glfw.x11.display, window->x11.handle,
protocols, count);
}
}
if (_glfw.x11.NET_WM_PID)
{
const pid_t pid = getpid();
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.NET_WM_PID, XA_CARDINAL, 32,
PropModeReplace,
(unsigned char*) &pid, 1);
}
// Set ICCCM WM_HINTS property
{
XWMHints* hints = XAllocWMHints();
if (!hints)
{
_glfwInputError(GLFW_OUT_OF_MEMORY,
"X11: Failed to allocate WM hints");
return GL_FALSE;
}
hints->flags = StateHint;
hints->initial_state = NormalState;
XSetWMHints(_glfw.x11.display, window->x11.handle, hints);
XFree(hints);
}
// Set ICCCM WM_NORMAL_HINTS property (even if no parts are set)
{
XSizeHints* hints = XAllocSizeHints();
hints->flags = 0;
if (wndconfig->monitor)
{
hints->flags |= PPosition;
_glfwPlatformGetMonitorPos(wndconfig->monitor, &hints->x, &hints->y);
}
else
{
// HACK: Explicitly setting PPosition to any value causes some WMs,
// notably Compiz and Metacity, to honor the position of
// unmapped windows set by XMoveWindow
hints->flags |= PPosition;
hints->x = hints->y = 0;
}
if (!wndconfig->resizable)
{
hints->flags |= (PMinSize | PMaxSize);
hints->min_width = hints->max_width = wndconfig->width;
hints->min_height = hints->max_height = wndconfig->height;
}
XSetWMNormalHints(_glfw.x11.display, window->x11.handle, hints);
XFree(hints);
}
// Set ICCCM WM_CLASS property
// HACK: Until a mechanism for specifying the application name is added, the
// initial window title is used as the window class name
if (strlen(wndconfig->title))
{
XClassHint* hint = XAllocClassHint();
hint->res_name = (char*) wndconfig->title;
hint->res_class = (char*) wndconfig->title;
XSetClassHint(_glfw.x11.display, window->x11.handle, hint);
XFree(hint);
}
if (_glfw.x11.xi.available)
{
// Select for XInput2 events
XIEventMask eventmask;
unsigned char mask[] = { 0 };
eventmask.deviceid = 2;
eventmask.mask_len = sizeof(mask);
eventmask.mask = mask;
XISetMask(mask, XI_Motion);
XISelectEvents(_glfw.x11.display, window->x11.handle, &eventmask, 1);
}
if (_glfw.x11.XdndAware)
{
// Announce support for Xdnd (drag and drop)
const Atom version = 5;
XChangeProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.XdndAware, XA_ATOM, 32,
PropModeReplace, (unsigned char*) &version, 1);
}
_glfwPlatformSetWindowTitle(window, wndconfig->title);
XRRSelectInput(_glfw.x11.display, window->x11.handle,
RRScreenChangeNotifyMask);
_glfwPlatformGetWindowPos(window, &window->x11.xpos, &window->x11.ypos);
_glfwPlatformGetWindowSize(window, &window->x11.width, &window->x11.height);
return GL_TRUE;
}
// Prepare for creation of the OpenGL context
//
int _glfwCreateContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig)
{
int attribs[40];
GLXFBConfig native;
GLXContext share = NULL;
if (wndconfig->share)
share = wndconfig->share->glx.context;
if (!chooseFBConfig(fbconfig, &native))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to find a suitable GLXFBConfig");
return GL_FALSE;
}
// Retrieve the corresponding visual
if (_glfw.glx.SGIX_fbconfig)
{
window->glx.visual =
_glfw.glx.GetVisualFromFBConfigSGIX(_glfw.x11.display, native);
}
else
window->glx.visual = glXGetVisualFromFBConfig(_glfw.x11.display, native);
if (window->glx.visual == NULL)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to retrieve visual for GLXFBConfig");
return GL_FALSE;
}
if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile ||
!_glfw.glx.EXT_create_context_es2_profile)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: OpenGL ES requested but "
"GLX_EXT_create_context_es2_profile is unavailable");
return GL_FALSE;
}
}
if (wndconfig->glForward)
{
if (!_glfw.glx.ARB_create_context)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: Forward compatibility requested but "
"GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
}
if (wndconfig->glProfile)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: An OpenGL profile requested but "
"GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
}
_glfwGrabXErrorHandler();
if (_glfw.glx.ARB_create_context)
{
int index = 0, mask = 0, flags = 0, strategy = 0;
if (wndconfig->clientAPI == GLFW_OPENGL_API)
{
if (wndconfig->glForward)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (wndconfig->glDebug)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
if (wndconfig->glProfile)
{
if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
}
}
else
mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
if (wndconfig->glRobustness != GLFW_NO_ROBUSTNESS)
{
if (_glfw.glx.ARB_create_context_robustness)
{
if (wndconfig->glRobustness == GLFW_NO_RESET_NOTIFICATION)
strategy = GLX_NO_RESET_NOTIFICATION_ARB;
else if (wndconfig->glRobustness == GLFW_LOSE_CONTEXT_ON_RESET)
strategy = GLX_LOSE_CONTEXT_ON_RESET_ARB;
flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
}
}
if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
{
// NOTE: Only request an explicitly versioned context when
// necessary, as explicitly requesting version 1.0 does not
// always return the highest available version
setGLXattrib(GLX_CONTEXT_MAJOR_VERSION_ARB, wndconfig->glMajor);
setGLXattrib(GLX_CONTEXT_MINOR_VERSION_ARB, wndconfig->glMinor);
}
if (mask)
setGLXattrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
if (flags)
setGLXattrib(GLX_CONTEXT_FLAGS_ARB, flags);
if (strategy)
setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB, strategy);
setGLXattrib(None, None);
window->glx.context =
_glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
native,
share,
True,
attribs);
if (window->glx.context == NULL)
{
// HACK: This is a fallback for the broken Mesa implementation of
// GLX_ARB_create_context_profile, which fails default 1.0
// context creation with a GLXBadProfileARB error in violation
// of the extension spec
if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
wndconfig->clientAPI == GLFW_OPENGL_API &&
wndconfig->glProfile == GLFW_OPENGL_ANY_PROFILE &&
wndconfig->glForward == GL_FALSE)
{
window->glx.context = createLegacyContext(window, native, share);
}
}
}
else
window->glx.context = createLegacyContext(window, native, share);
_glfwReleaseXErrorHandler();
if (window->glx.context == NULL)
{
_glfwInputXError(GLFW_PLATFORM_ERROR, "GLX: Failed to create context");
return GL_FALSE;
}
return GL_TRUE;
}
// Create the OpenGL or OpenGL ES context
//
int _glfwCreateContext(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
int attribs[40];
GLXFBConfig native = NULL;
GLXContext share = NULL;
if (ctxconfig->share)
share = ctxconfig->share->glx.context;
if (!chooseFBConfig(fbconfig, &native))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"GLX: Failed to find a suitable GLXFBConfig");
return GL_FALSE;
}
window->glx.visual = _glfw_glXGetVisualFromFBConfig(_glfw.x11.display,
native);
if (!window->glx.visual)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"GLX: Failed to retrieve visual for GLXFBConfig");
return GL_FALSE;
}
if (ctxconfig->api == GLFW_OPENGL_ES_API)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile ||
!_glfw.glx.EXT_create_context_es2_profile)
{
_glfwInputError(GLFW_API_UNAVAILABLE,
"GLX: OpenGL ES requested but GLX_EXT_create_context_es2_profile is unavailable");
return GL_FALSE;
}
}
if (ctxconfig->forward)
{
if (!_glfw.glx.ARB_create_context)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: Forward compatibility requested but GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
}
if (ctxconfig->profile)
{
if (!_glfw.glx.ARB_create_context ||
!_glfw.glx.ARB_create_context_profile)
{
_glfwInputError(GLFW_VERSION_UNAVAILABLE,
"GLX: An OpenGL profile requested but GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
}
_glfwGrabXErrorHandler();
if (_glfw.glx.ARB_create_context)
{
int index = 0, mask = 0, flags = 0;
if (ctxconfig->api == GLFW_OPENGL_API)
{
if (ctxconfig->forward)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
}
else
mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
if (ctxconfig->debug)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
if (ctxconfig->robustness)
{
if (_glfw.glx.ARB_create_context_robustness)
{
if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
{
setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
GLX_NO_RESET_NOTIFICATION_ARB);
}
else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
{
setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
GLX_LOSE_CONTEXT_ON_RESET_ARB);
}
flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
}
}
if (ctxconfig->release)
{
if (_glfw.glx.ARB_context_flush_control)
{
if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
{
setGLXattrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB);
}
else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH)
{
setGLXattrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB);
}
}
}
// NOTE: Only request an explicitly versioned context when necessary, as
// explicitly requesting version 1.0 does not always return the
// highest version supported by the driver
if (ctxconfig->major != 1 || ctxconfig->minor != 0)
{
setGLXattrib(GLX_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major);
setGLXattrib(GLX_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor);
}
if (mask)
setGLXattrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
if (flags)
setGLXattrib(GLX_CONTEXT_FLAGS_ARB, flags);
setGLXattrib(None, None);
window->glx.context =
_glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
native,
share,
True,
attribs);
// HACK: This is a fallback for broken versions of the Mesa
// implementation of GLX_ARB_create_context_profile that fail
// default 1.0 context creation with a GLXBadProfileARB error in
// violation of the extension spec
if (!window->glx.context)
{
if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
ctxconfig->api == GLFW_OPENGL_API &&
ctxconfig->profile == GLFW_OPENGL_ANY_PROFILE &&
ctxconfig->forward == GL_FALSE)
{
window->glx.context = createLegacyContext(window, native, share);
}
}
}
else
window->glx.context = createLegacyContext(window, native, share);
_glfwReleaseXErrorHandler();
if (!window->glx.context)
{
_glfwInputXError(GLFW_VERSION_UNAVAILABLE, "GLX: Failed to create context");
return GL_FALSE;
}
return GL_TRUE;
}