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glfw/src/x11_window.c

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//========================================================================
// GLFW - An OpenGL library
// Platform: X11/GLX
// API version: 3.0
// 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 <limits.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
// Action for EWMH client messages
#define _NET_WM_STATE_REMOVE 0
#define _NET_WM_STATE_ADD 1
#define _NET_WM_STATE_TOGGLE 2
// Additional mouse button names for XButtonEvent
#define Button6 6
#define Button7 7
//========================================================================
// Error handler for BadMatch errors when requesting context with
// unavailable OpenGL versions using the GLX_ARB_create_context extension
//========================================================================
static int errorHandler(Display *display, XErrorEvent* event)
{
return 0;
}
//========================================================================
// Checks whether the event is a MapNotify for the specified window
//========================================================================
static Bool isMapNotify(Display* d, XEvent* e, char* arg)
{
return (e->type == MapNotify) && (e->xmap.window == (Window)arg);
}
//========================================================================
// Retrieve a single window property of the specified type
// Inspired by fghGetWindowProperty from freeglut
//========================================================================
static unsigned long getWindowProperty(Window window,
Atom property,
Atom type,
unsigned char** value)
{
Atom actualType;
int actualFormat;
unsigned long itemCount, bytesAfter;
XGetWindowProperty(_glfwLibrary.X11.display,
window,
property,
0,
LONG_MAX,
False,
type,
&actualType,
&actualFormat,
&itemCount,
&bytesAfter,
value);
if (actualType != type)
return 0;
return itemCount;
}
//========================================================================
// Check whether the specified atom is supported
//========================================================================
static Atom getSupportedAtom(Atom* supportedAtoms,
unsigned long atomCount,
const char* atomName)
{
Atom atom = XInternAtom(_glfwLibrary.X11.display, atomName, True);
if (atom != None)
{
unsigned long i;
for (i = 0; i < atomCount; i++)
{
if (supportedAtoms[i] == atom)
return atom;
}
}
return None;
}
//========================================================================
// Check whether the running window manager is EWMH-compliant
//========================================================================
static GLboolean hasEWMH(_GLFWwindow* window)
{
Window* windowFromRoot = NULL;
Window* windowFromChild = NULL;
// Hey kids; let's see if the window manager supports EWMH!
// First we need a couple of atoms, which should already be there
Atom supportingWmCheck =
XInternAtom(_glfwLibrary.X11.display, "_NET_SUPPORTING_WM_CHECK", True);
Atom wmSupported =
XInternAtom(_glfwLibrary.X11.display, "_NET_SUPPORTED", True);
if (supportingWmCheck == None || wmSupported == None)
return GL_FALSE;
// Then we look for the _NET_SUPPORTING_WM_CHECK property of the root window
if (getWindowProperty(_glfwLibrary.X11.root,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromRoot) != 1)
{
XFree(windowFromRoot);
return GL_FALSE;
}
// It should be the ID of a child window (of the root)
// Then we look for the same property on the child window
if (getWindowProperty(*windowFromRoot,
supportingWmCheck,
XA_WINDOW,
(unsigned char**) &windowFromChild) != 1)
{
XFree(windowFromRoot);
XFree(windowFromChild);
return GL_FALSE;
}
// It should be the ID of that same child window
if (*windowFromRoot != *windowFromChild)
{
XFree(windowFromRoot);
XFree(windowFromChild);
return GL_FALSE;
}
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 = getWindowProperty(_glfwLibrary.X11.root,
wmSupported,
XA_ATOM,
(unsigned char**) &supportedAtoms);
// See which of the atoms we support that are supported by the WM
window->X11.wmState =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE");
window->X11.wmStateFullscreen =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_STATE_FULLSCREEN");
window->X11.wmPing =
getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_PING");
window->X11.wmActiveWindow =
getSupportedAtom(supportedAtoms, atomCount, "_NET_ACTIVE_WINDOW");
XFree(supportedAtoms);
return GL_TRUE;
}
//========================================================================
// Translates an X Window key to internal coding
//========================================================================
static int translateKey(int keycode)
{
// Use the pre-filled LUT (see updateKeyCodeLUT() ).
if ((keycode >= 0) && (keycode < 256))
{
return _glfwLibrary.X11.keyCodeLUT[keycode];
}
else
{
return -1;
}
}
//========================================================================
// Translates an X Window event to Unicode
//========================================================================
static int translateChar(XKeyEvent* event)
{
KeySym keysym;
// Get X11 keysym
XLookupString(event, NULL, 0, &keysym, NULL);
// Convert to Unicode (see x11_keysym2unicode.c)
return (int) _glfwKeySym2Unicode(keysym);
}
//========================================================================
// Returns the specified attribute of the specified GLXFBConfig
// NOTE: Do not call this unless we have found GLX 1.3+ or GLX_SGIX_fbconfig
//========================================================================
static int getFBConfigAttrib(_GLFWwindow* window, GLXFBConfig fbconfig, int attrib)
{
int value;
if (window->GLX.SGIX_fbconfig)
{
window->GLX.GetFBConfigAttribSGIX(_glfwLibrary.X11.display,
fbconfig, attrib, &value);
}
else
glXGetFBConfigAttrib(_glfwLibrary.X11.display, fbconfig, attrib, &value);
return value;
}
//========================================================================
// Return a list of available and usable framebuffer configs
//========================================================================
static _GLFWfbconfig* getFBConfigs(_GLFWwindow* window, unsigned int* found)
{
GLXFBConfig* fbconfigs;
_GLFWfbconfig* result;
int i, count = 0;
*found = 0;
if (_glfwLibrary.X11.glxMajor == 1 && _glfwLibrary.X11.glxMinor < 3)
{
if (!window->GLX.SGIX_fbconfig)
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
"X11/GLX: GLXFBConfig support not found");
return NULL;
}
}
if (window->GLX.SGIX_fbconfig)
{
fbconfigs = window->GLX.ChooseFBConfigSGIX(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
NULL,
&count);
if (!count)
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
"X11/GLX: No GLXFBConfigs returned");
return NULL;
}
}
else
{
fbconfigs = glXGetFBConfigs(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
&count);
if (!count)
{
_glfwSetError(GLFW_OPENGL_UNAVAILABLE,
"X11/GLX: No GLXFBConfigs returned");
return NULL;
}
}
result = (_GLFWfbconfig*) _glfwMalloc(sizeof(_GLFWfbconfig) * count);
if (!result)
{
_glfwSetError(GLFW_OUT_OF_MEMORY,
"X11/GLX: Failed to allocate _GLFWfbconfig array");
return NULL;
}
for (i = 0; i < count; i++)
{
if (!getFBConfigAttrib(window, fbconfigs[i], GLX_DOUBLEBUFFER) ||
!getFBConfigAttrib(window, fbconfigs[i], GLX_VISUAL_ID))
{
// Only consider double-buffered GLXFBConfigs with associated visuals
continue;
}
if (!(getFBConfigAttrib(window,
fbconfigs[i],
GLX_RENDER_TYPE) & GLX_RGBA_BIT))
{
// Only consider RGBA GLXFBConfigs
continue;
}
if (!(getFBConfigAttrib(window, fbconfigs[i], GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
{
// Only consider window GLXFBConfigs
continue;
}
result[*found].redBits = getFBConfigAttrib(window, fbconfigs[i], GLX_RED_SIZE);
result[*found].greenBits = getFBConfigAttrib(window, fbconfigs[i], GLX_GREEN_SIZE);
result[*found].blueBits = getFBConfigAttrib(window, fbconfigs[i], GLX_BLUE_SIZE);
result[*found].alphaBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ALPHA_SIZE);
result[*found].depthBits = getFBConfigAttrib(window, fbconfigs[i], GLX_DEPTH_SIZE);
result[*found].stencilBits = getFBConfigAttrib(window, fbconfigs[i], GLX_STENCIL_SIZE);
result[*found].accumRedBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_RED_SIZE);
result[*found].accumGreenBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_GREEN_SIZE);
result[*found].accumBlueBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_BLUE_SIZE);
result[*found].accumAlphaBits = getFBConfigAttrib(window, fbconfigs[i], GLX_ACCUM_ALPHA_SIZE);
result[*found].auxBuffers = getFBConfigAttrib(window, fbconfigs[i], GLX_AUX_BUFFERS);
result[*found].stereo = getFBConfigAttrib(window, fbconfigs[i], GLX_STEREO);
if (window->GLX.ARB_multisample)
result[*found].samples = getFBConfigAttrib(window, fbconfigs[i], GLX_SAMPLES);
else
result[*found].samples = 0;
result[*found].platformID = (GLFWintptr) getFBConfigAttrib(window, fbconfigs[i], GLX_FBCONFIG_ID);
(*found)++;
}
XFree(fbconfigs);
return result;
}
//========================================================================
// Create the OpenGL context
//========================================================================
#define setGLXattrib(attribs, index, attribName, attribValue) \
attribs[index++] = attribName; \
attribs[index++] = attribValue;
static int createContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
GLXFBConfigID fbconfigID)
{
int attribs[40];
int dummy, index;
GLXFBConfig* fbconfig;
GLXContext share = NULL;
if (wndconfig->share)
share = wndconfig->share->GLX.context;
// Retrieve the previously selected GLXFBConfig
{
index = 0;
setGLXattrib(attribs, index, GLX_FBCONFIG_ID, (int) fbconfigID);
setGLXattrib(attribs, index, None, None);
if (window->GLX.SGIX_fbconfig)
{
fbconfig = window->GLX.ChooseFBConfigSGIX(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
attribs,
&dummy);
}
else
{
fbconfig = glXChooseFBConfig(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
attribs,
&dummy);
}
if (fbconfig == NULL)
{
_glfwSetError(GLFW_PLATFORM_ERROR,
"X11/GLX: Failed to retrieve the selected GLXFBConfig");
return GL_FALSE;
}
}
// Retrieve the corresponding visual
if (window->GLX.SGIX_fbconfig)
{
window->GLX.visual = window->GLX.GetVisualFromFBConfigSGIX(_glfwLibrary.X11.display,
*fbconfig);
}
else
{
window->GLX.visual = glXGetVisualFromFBConfig(_glfwLibrary.X11.display,
*fbconfig);
}
if (window->GLX.visual == NULL)
{
XFree(fbconfig);
_glfwSetError(GLFW_PLATFORM_ERROR,
"X11/GLX: Failed to retrieve visual for GLXFBConfig");
return GL_FALSE;
}
if (window->GLX.ARB_create_context)
{
index = 0;
if (wndconfig->glMajor != 1 || wndconfig->glMinor != 0)
{
// Request an explicitly versioned context
setGLXattrib(attribs, index, GLX_CONTEXT_MAJOR_VERSION_ARB, wndconfig->glMajor);
setGLXattrib(attribs, index, GLX_CONTEXT_MINOR_VERSION_ARB, wndconfig->glMinor);
}
if (wndconfig->glForward || wndconfig->glDebug || wndconfig->glRobustness)
{
int flags = 0;
if (wndconfig->glForward)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (wndconfig->glDebug)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
if (wndconfig->glRobustness)
flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
setGLXattrib(attribs, index, GLX_CONTEXT_FLAGS_ARB, flags);
}
if (wndconfig->glProfile)
{
int flags = 0;
if (!window->GLX.ARB_create_context_profile)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"X11/GLX: An OpenGL profile requested but "
"GLX_ARB_create_context_profile is unavailable");
return GL_FALSE;
}
if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE &&
!window->GLX.EXT_create_context_es2_profile)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"X11/GLX: OpenGL ES 2.x profile requested but "
"GLX_EXT_create_context_es2_profile is unavailable");
return GL_FALSE;
}
if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
flags = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_COMPAT_PROFILE)
flags = GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
else if (wndconfig->glProfile == GLFW_OPENGL_ES2_PROFILE)
flags = GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
setGLXattrib(attribs, index, GLX_CONTEXT_PROFILE_MASK_ARB, flags);
}
if (wndconfig->glRobustness)
{
int strategy;
if (!window->GLX.ARB_create_context_robustness)
{
_glfwSetError(GLFW_VERSION_UNAVAILABLE,
"X11/GLX: An OpenGL robustness strategy was "
"requested but GLX_ARB_create_context_robustness "
"is unavailable");
return GL_FALSE;
}
if (wndconfig->glRobustness == GLFW_OPENGL_NO_RESET_NOTIFICATION)
strategy = GLX_NO_RESET_NOTIFICATION_ARB;
else if (wndconfig->glRobustness == GLFW_OPENGL_LOSE_CONTEXT_ON_RESET)
strategy = GLX_LOSE_CONTEXT_ON_RESET_ARB;
setGLXattrib(attribs,
index,
GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
strategy);
}
setGLXattrib(attribs, index, None, None);
// This is the only place we set an Xlib error handler, and we only do
// it because glXCreateContextAttribsARB generates a BadMatch error if
// the requested OpenGL version is unavailable (instead of a civilized
// response like returning NULL)
XSetErrorHandler(errorHandler);
window->GLX.context =
window->GLX.CreateContextAttribsARB(_glfwLibrary.X11.display,
*fbconfig,
share,
True,
attribs);
// We are done, so unset the error handler again (see above)
XSetErrorHandler(NULL);
}
else
{
if (window->GLX.SGIX_fbconfig)
{
window->GLX.context =
window->GLX.CreateContextWithConfigSGIX(_glfwLibrary.X11.display,
*fbconfig,
GLX_RGBA_TYPE,
share,
True);
}
else
{
window->GLX.context = glXCreateNewContext(_glfwLibrary.X11.display,
*fbconfig,
GLX_RGBA_TYPE,
share,
True);
}
}
XFree(fbconfig);
if (window->GLX.context == NULL)
{
// TODO: Handle all the various error codes here
_glfwSetError(GLFW_PLATFORM_ERROR,
"X11/GLX: Failed to create OpenGL context");
return GL_FALSE;
}
window->GLX.fbconfigID = fbconfigID;
return GL_TRUE;
}
#undef setGLXattrib
//========================================================================
// Initialize GLX-specific extensions
//========================================================================
static void initGLXExtensions(_GLFWwindow* window)
{
if (_glfwPlatformExtensionSupported("GLX_EXT_swap_control"))
{
window->GLX.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)
_glfwPlatformGetProcAddress("glXSwapIntervalEXT");
if (window->GLX.SwapIntervalEXT)
window->GLX.EXT_swap_control = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("GLX_SGI_swap_control"))
{
window->GLX.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)
_glfwPlatformGetProcAddress("glXSwapIntervalSGI");
if (window->GLX.SwapIntervalSGI)
window->GLX.SGI_swap_control = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("GLX_SGIX_fbconfig"))
{
window->GLX.GetFBConfigAttribSGIX = (PFNGLXGETFBCONFIGATTRIBSGIXPROC)
_glfwPlatformGetProcAddress("glXGetFBConfigAttribSGIX");
window->GLX.ChooseFBConfigSGIX = (PFNGLXCHOOSEFBCONFIGSGIXPROC)
_glfwPlatformGetProcAddress("glXChooseFBConfigSGIX");
window->GLX.CreateContextWithConfigSGIX = (PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC)
_glfwPlatformGetProcAddress("glXCreateContextWithConfigSGIX");
window->GLX.GetVisualFromFBConfigSGIX = (PFNGLXGETVISUALFROMFBCONFIGSGIXPROC)
_glfwPlatformGetProcAddress("glXGetVisualFromFBConfigSGIX");
if (window->GLX.GetFBConfigAttribSGIX &&
window->GLX.ChooseFBConfigSGIX &&
window->GLX.CreateContextWithConfigSGIX &&
window->GLX.GetVisualFromFBConfigSGIX)
{
window->GLX.SGIX_fbconfig = GL_TRUE;
}
}
if (_glfwPlatformExtensionSupported("GLX_ARB_multisample"))
window->GLX.ARB_multisample = GL_TRUE;
if (_glfwPlatformExtensionSupported("GLX_ARB_create_context"))
{
window->GLX.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
_glfwPlatformGetProcAddress("glXCreateContextAttribsARB");
if (window->GLX.CreateContextAttribsARB)
window->GLX.ARB_create_context = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_robustness"))
window->GLX.ARB_create_context_robustness = GL_TRUE;
if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_profile"))
window->GLX.ARB_create_context_profile = GL_TRUE;
if (_glfwPlatformExtensionSupported("GLX_EXT_create_context_es2_profile"))
window->GLX.EXT_create_context_es2_profile = GL_TRUE;
}
//========================================================================
// Create the X11 window (and its colormap)
//========================================================================
static GLboolean createWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig)
{
XEvent event;
unsigned long wamask;
XSetWindowAttributes wa;
// Every window needs a colormap
// Create one based on the visual used by the current context
window->X11.colormap = XCreateColormap(_glfwLibrary.X11.display,
_glfwLibrary.X11.root,
window->GLX.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;
if (wndconfig->mode == GLFW_WINDOWED)
{
// The /only/ reason we are setting the background pixel here is
// that otherwise our window wont get any decorations on systems
// using Compiz on Intel hardware
wa.background_pixel = BlackPixel(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen);
wamask |= CWBackPixel;
}
window->X11.handle = XCreateWindow(
_glfwLibrary.X11.display,
_glfwLibrary.X11.root,
0, 0, // Upper left corner of this window on root
window->width, window->height,
0, // Border width
window->GLX.visual->depth, // Color depth
InputOutput,
window->GLX.visual->visual,
wamask,
&wa
);
if (!window->X11.handle)
{
// TODO: Handle all the various error codes here
_glfwSetError(GLFW_PLATFORM_ERROR,
"X11/GLX: Failed to create window");
return GL_FALSE;
}
}
// Check whether an EWMH-compliant window manager is running
window->X11.hasEWMH = hasEWMH(window);
if (window->mode == GLFW_FULLSCREEN && !window->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 they're
// usually performed by the window manager
XSetWindowAttributes attributes;
attributes.override_redirect = True;
XChangeWindowAttributes(_glfwLibrary.X11.display,
window->X11.handle,
CWOverrideRedirect,
&attributes);
window->X11.overrideRedirect = GL_TRUE;
}
// Find or create the protocol atom for window close notifications
window->X11.wmDeleteWindow = XInternAtom(_glfwLibrary.X11.display,
"WM_DELETE_WINDOW",
False);
// Declare the WM protocols we support
{
int count = 0;
Atom protocols[2];
// The WM_DELETE_WINDOW ICCCM protocol
// Basic window close notification protocol
if (window->X11.wmDeleteWindow != None)
protocols[count++] = window->X11.wmDeleteWindow;
// The _NET_WM_PING EWMH protocol
// Tells the WM to ping our window and flag us as unresponsive if we
// don't reply within a few seconds
if (window->X11.wmPing != None)
protocols[count++] = window->X11.wmPing;
if (count > 0)
{
XSetWMProtocols(_glfwLibrary.X11.display, window->X11.handle,
protocols, count);
}
}
// Set ICCCM WM_HINTS property
{
XWMHints* hints = XAllocWMHints();
if (!hints)
{
_glfwSetError(GLFW_OUT_OF_MEMORY,
"X11/GLX: Failed to allocate WM hints");
return GL_FALSE;
}
hints->flags = StateHint;
hints->initial_state = NormalState;
XSetWMHints(_glfwLibrary.X11.display, window->X11.handle, hints);
XFree(hints);
}
// Set ICCCM WM_NORMAL_HINTS property (even if no parts are set)
{
XSizeHints* hints = XAllocSizeHints();
if (!hints)
{
_glfwSetError(GLFW_OUT_OF_MEMORY,
"X11/GLX: Failed to allocate size hints");
return GL_FALSE;
}
hints->flags = 0;
if (!wndconfig->resizable)
{
hints->flags |= (PMinSize | PMaxSize);
hints->min_width = hints->max_width = window->width;
hints->min_height = hints->max_height = window->height;
}
XSetWMNormalHints(_glfwLibrary.X11.display, window->X11.handle, hints);
XFree(hints);
}
_glfwPlatformSetWindowTitle(window, wndconfig->title);
// Make sure the window is mapped before proceeding
XMapWindow(_glfwLibrary.X11.display, window->X11.handle);
XPeekIfEvent(_glfwLibrary.X11.display, &event, isMapNotify,
(char*) window->X11.handle);
return GL_TRUE;
}
//========================================================================
// Hide mouse cursor
//========================================================================
static void hideMouseCursor(_GLFWwindow* window)
{
if (!window->X11.cursorHidden)
{
XDefineCursor(_glfwLibrary.X11.display,
window->X11.handle,
_glfwLibrary.X11.cursor);
window->X11.cursorHidden = GL_TRUE;
}
}
//========================================================================
// Capture mouse cursor
//========================================================================
static void captureMouseCursor(_GLFWwindow* window)
{
hideMouseCursor(window);
if (!window->X11.cursorGrabbed)
{
if (XGrabPointer(_glfwLibrary.X11.display, window->X11.handle, True,
ButtonPressMask | ButtonReleaseMask |
PointerMotionMask, GrabModeAsync, GrabModeAsync,
window->X11.handle, None, CurrentTime) ==
GrabSuccess)
{
window->X11.cursorGrabbed = GL_TRUE;
window->X11.cursorCentered = GL_FALSE;
}
}
}
//========================================================================
// Show mouse cursor
//========================================================================
static void showMouseCursor(_GLFWwindow* window)
{
// Un-grab cursor (only in windowed mode: in fullscreen mode we still
// want the mouse grabbed in order to confine the cursor to the window
// area)
if (window->X11.cursorGrabbed)
{
XUngrabPointer(_glfwLibrary.X11.display, CurrentTime);
window->X11.cursorGrabbed = GL_FALSE;
}
// Show cursor
if (window->X11.cursorHidden)
{
XUndefineCursor(_glfwLibrary.X11.display, window->X11.handle);
window->X11.cursorHidden = GL_FALSE;
}
}
//========================================================================
// Enter fullscreen mode
//========================================================================
static void enterFullscreenMode(_GLFWwindow* window)
{
if (!_glfwLibrary.X11.saver.changed)
{
// Remember old screen saver settings
XGetScreenSaver(_glfwLibrary.X11.display,
&_glfwLibrary.X11.saver.timeout,
&_glfwLibrary.X11.saver.interval,
&_glfwLibrary.X11.saver.blanking,
&_glfwLibrary.X11.saver.exposure);
// Disable screen saver
XSetScreenSaver(_glfwLibrary.X11.display, 0, 0, DontPreferBlanking,
DefaultExposures);
_glfwLibrary.X11.saver.changed = GL_TRUE;
}
_glfwSetVideoMode(_glfwLibrary.X11.screen,
&window->width, &window->height,
&window->refreshRate);
if (window->X11.hasEWMH &&
window->X11.wmState != None &&
window->X11.wmStateFullscreen != None)
{
if (window->X11.wmActiveWindow != None)
{
// Ask the window manager to raise and focus the GLFW window
// Only focused windows with the _NET_WM_STATE_FULLSCREEN state end
// up on top of all other windows ("Stacking order" in EWMH spec)
XEvent event;
memset(&event, 0, sizeof(event));
event.type = ClientMessage;
event.xclient.window = window->X11.handle;
event.xclient.format = 32; // Data is 32-bit longs
event.xclient.message_type = window->X11.wmActiveWindow;
event.xclient.data.l[0] = 1; // Sender is a normal application
event.xclient.data.l[1] = 0; // We don't really know the timestamp
XSendEvent(_glfwLibrary.X11.display,
_glfwLibrary.X11.root,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&event);
}
// Ask the window manager to make the GLFW window a fullscreen window
// Fullscreen windows are undecorated and, when focused, are kept
// on top of all other windows
XEvent event;
memset(&event, 0, sizeof(event));
event.type = ClientMessage;
event.xclient.window = window->X11.handle;
event.xclient.format = 32; // Data is 32-bit longs
event.xclient.message_type = window->X11.wmState;
event.xclient.data.l[0] = _NET_WM_STATE_ADD;
event.xclient.data.l[1] = window->X11.wmStateFullscreen;
event.xclient.data.l[2] = 0; // No secondary property
event.xclient.data.l[3] = 1; // Sender is a normal application
XSendEvent(_glfwLibrary.X11.display,
_glfwLibrary.X11.root,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&event);
}
else if (window->X11.overrideRedirect)
{
// In override-redirect mode, we have divorced ourselves from the
// window manager, so we need to do everything manually
XRaiseWindow(_glfwLibrary.X11.display, window->X11.handle);
XSetInputFocus(_glfwLibrary.X11.display, window->X11.handle,
RevertToParent, CurrentTime);
XMoveWindow(_glfwLibrary.X11.display, window->X11.handle, 0, 0);
XResizeWindow(_glfwLibrary.X11.display, window->X11.handle,
window->width, window->height);
}
// HACK: Try to get window inside viewport (for virtual displays) by moving
// the mouse cursor to the upper left corner (and then to the center)
// This hack should be harmless on saner systems as well
XWarpPointer(_glfwLibrary.X11.display, None, window->X11.handle, 0,0,0,0, 0,0);
XWarpPointer(_glfwLibrary.X11.display, None, window->X11.handle, 0,0,0,0,
window->width / 2, window->height / 2);
}
//========================================================================
// Leave fullscreen mode
//========================================================================
static void leaveFullscreenMode(_GLFWwindow* window)
{
_glfwRestoreVideoMode(_glfwLibrary.X11.screen);
// Did we change the screen saver setting?
if (_glfwLibrary.X11.saver.changed)
{
// Restore old screen saver settings
XSetScreenSaver(_glfwLibrary.X11.display,
_glfwLibrary.X11.saver.timeout,
_glfwLibrary.X11.saver.interval,
_glfwLibrary.X11.saver.blanking,
_glfwLibrary.X11.saver.exposure);
_glfwLibrary.X11.saver.changed = GL_FALSE;
}
if (window->X11.hasEWMH &&
window->X11.wmState != None &&
window->X11.wmStateFullscreen != None)
{
// Ask the window manager to make the GLFW window a normal window
// Normal windows usually have frames and other decorations
XEvent event;
memset(&event, 0, sizeof(event));
event.type = ClientMessage;
event.xclient.window = window->X11.handle;
event.xclient.format = 32; // Data is 32-bit longs
event.xclient.message_type = window->X11.wmState;
event.xclient.data.l[0] = _NET_WM_STATE_REMOVE;
event.xclient.data.l[1] = window->X11.wmStateFullscreen;
event.xclient.data.l[2] = 0; // No secondary property
event.xclient.data.l[3] = 1; // Sender is a normal application
XSendEvent(_glfwLibrary.X11.display,
_glfwLibrary.X11.root,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&event);
}
}
//========================================================================
// Return the GLFW window corresponding to the specified X11 window
//========================================================================
static _GLFWwindow* findWindow(Window handle)
{
_GLFWwindow* window;
for (window = _glfwLibrary.windowListHead; window; window = window->next)
{
if (window->X11.handle == handle)
return window;
}
return NULL;
}
//========================================================================
// Get and process next X event (called by _glfwPlatformPollEvents)
//========================================================================
static void processSingleEvent(void)
{
_GLFWwindow* window;
XEvent event;
XNextEvent(_glfwLibrary.X11.display, &event);
switch (event.type)
{
case KeyPress:
{
// A keyboard key was pressed
window = findWindow(event.xkey.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for KeyPress event\n");
return;
}
// Translate and report key press
_glfwInputKey(window, translateKey(event.xkey.keycode), GLFW_PRESS);
// Translate and report character input
_glfwInputChar(window, translateChar(&event.xkey));
break;
}
case KeyRelease:
{
// A keyboard key was released
window = findWindow(event.xkey.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for KeyRelease event\n");
return;
}
// Do not report key releases for key repeats. For key repeats we
// will get KeyRelease/KeyPress pairs with similar or identical
// time stamps. User selected key repeat filtering is handled in
// _glfwInputKey/_glfwInputChar.
if (XEventsQueued(_glfwLibrary.X11.display, QueuedAfterReading))
{
XEvent nextEvent;
XPeekEvent(_glfwLibrary.X11.display, &nextEvent);
if (nextEvent.type == KeyPress &&
nextEvent.xkey.window == event.xkey.window &&
nextEvent.xkey.keycode == event.xkey.keycode)
{
// This last check is a hack to work around key repeats
// leaking through due to some sort of time drift
// Toshiyuki Takahashi can press a button 16 times per
// second so it's fairly safe to assume that no human is
// pressing the key 50 times per second (value is ms)
if ((nextEvent.xkey.time - event.xkey.time) < 20)
{
// Do not report anything for this event
break;
}
}
}
// Translate and report key release
_glfwInputKey(window, translateKey(event.xkey.keycode), GLFW_RELEASE);
break;
}
case ButtonPress:
{
// A mouse button was pressed or a scrolling event occurred
window = findWindow(event.xbutton.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for ButtonPress event\n");
return;
}
if (event.xbutton.button == Button1)
_glfwInputMouseClick(window, GLFW_MOUSE_BUTTON_LEFT, GLFW_PRESS);
else if (event.xbutton.button == Button2)
_glfwInputMouseClick(window, GLFW_MOUSE_BUTTON_MIDDLE, GLFW_PRESS);
else if (event.xbutton.button == Button3)
_glfwInputMouseClick(window, GLFW_MOUSE_BUTTON_RIGHT, GLFW_PRESS);
// XFree86 3.3.2 and later translates mouse wheel up/down into
// mouse button 4 & 5 presses
else if (event.xbutton.button == Button4)
_glfwInputScroll(window, 0, 1);
else if (event.xbutton.button == Button5)
_glfwInputScroll(window, 0, -1);
else if (event.xbutton.button == Button6)
_glfwInputScroll(window, -1, 0);
else if (event.xbutton.button == Button7)
_glfwInputScroll(window, 1, 0);
break;
}
case ButtonRelease:
{
// A mouse button was released
window = findWindow(event.xbutton.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for ButtonRelease event\n");
return;
}
if (event.xbutton.button == Button1)
{
_glfwInputMouseClick(window,
GLFW_MOUSE_BUTTON_LEFT,
GLFW_RELEASE);
}
else if (event.xbutton.button == Button2)
{
_glfwInputMouseClick(window,
GLFW_MOUSE_BUTTON_MIDDLE,
GLFW_RELEASE);
}
else if (event.xbutton.button == Button3)
{
_glfwInputMouseClick(window,
GLFW_MOUSE_BUTTON_RIGHT,
GLFW_RELEASE);
}
break;
}
case MotionNotify:
{
// The mouse cursor was moved
window = findWindow(event.xmotion.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for MotionNotify event\n");
return;
}
if (event.xmotion.x != window->X11.cursorPosX ||
event.xmotion.y != window->X11.cursorPosY)
{
// The mouse cursor was moved and we didn't do it
int x, y;
if (window->cursorMode == GLFW_CURSOR_CAPTURED)
{
if (_glfwLibrary.activeWindow != window)
break;
x = event.xmotion.x - window->X11.cursorPosX;
y = event.xmotion.y - window->X11.cursorPosY;
}
else
{
x = event.xmotion.x;
y = event.xmotion.y;
}
window->X11.cursorPosX = event.xmotion.x;
window->X11.cursorPosY = event.xmotion.y;
window->X11.cursorCentered = GL_FALSE;
_glfwInputCursorMotion(window, x, y);
}
break;
}
case ConfigureNotify:
{
// The window configuration changed somehow
window = findWindow(event.xconfigure.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for ConfigureNotify event\n");
return;
}
_glfwInputWindowSize(window,
event.xconfigure.width,
event.xconfigure.height);
_glfwInputWindowPos(window,
event.xconfigure.x,
event.xconfigure.y);
break;
}
case ClientMessage:
{
// Custom client message, probably from the window manager
window = findWindow(event.xclient.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for ClientMessage event\n");
return;
}
if ((Atom) event.xclient.data.l[0] == window->X11.wmDeleteWindow)
{
// The window manager was asked to close the window, for example by
// the user pressing a 'close' window decoration button
window->closeRequested = GL_TRUE;
}
else if (window->X11.wmPing != None &&
(Atom) event.xclient.data.l[0] == window->X11.wmPing)
{
// The window manager is pinging us to make sure we are still
// responding to events
event.xclient.window = _glfwLibrary.X11.root;
XSendEvent(_glfwLibrary.X11.display,
event.xclient.window,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&event);
}
break;
}
case MapNotify:
{
// The window was mapped
window = findWindow(event.xmap.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for MapNotify event\n");
return;
}
_glfwInputWindowIconify(window, GL_FALSE);
break;
}
case UnmapNotify:
{
// The window was unmapped
window = findWindow(event.xmap.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for UnmapNotify event\n");
return;
}
_glfwInputWindowIconify(window, GL_TRUE);
break;
}
case FocusIn:
{
// The window gained focus
window = findWindow(event.xfocus.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for FocusIn event\n");
return;
}
_glfwInputWindowFocus(window, GL_TRUE);
if (window->cursorMode == GLFW_CURSOR_CAPTURED)
captureMouseCursor(window);
break;
}
case FocusOut:
{
// The window lost focus
window = findWindow(event.xfocus.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for FocusOut event\n");
return;
}
_glfwInputWindowFocus(window, GL_FALSE);
if (window->cursorMode == GLFW_CURSOR_CAPTURED)
showMouseCursor(window);
break;
}
case Expose:
{
// The window's contents was damaged
window = findWindow(event.xexpose.window);
if (window == NULL)
{
fprintf(stderr, "Cannot find GLFW window structure for Expose event\n");
return;
}
_glfwInputWindowDamage(window);
break;
}
// Was the window destroyed?
case DestroyNotify:
return;
default:
{
#if defined(_GLFW_HAS_XRANDR)
switch (event.type - _glfwLibrary.X11.RandR.eventBase)
{
case RRScreenChangeNotify:
{
// Show XRandR that we really care
XRRUpdateConfiguration(&event);
break;
}
}
#endif /*_GLFW_HAS_XRANDR*/
break;
}
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
//========================================================================
// Here is where the window is created, and
// the OpenGL rendering context is created
//========================================================================
int _glfwPlatformOpenWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig)
{
_GLFWfbconfig closest;
window->refreshRate = wndconfig->refreshRate;
window->resizable = wndconfig->resizable;
initGLXExtensions(window);
// Choose the best available fbconfig
{
unsigned int fbcount;
_GLFWfbconfig* fbconfigs;
const _GLFWfbconfig* result;
fbconfigs = getFBConfigs(window, &fbcount);
if (!fbconfigs)
return GL_FALSE;
result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount);
if (!result)
{
_glfwFree(fbconfigs);
return GL_FALSE;
}
closest = *result;
_glfwFree(fbconfigs);
}
if (!createContext(window, wndconfig, (GLXFBConfigID) closest.platformID))
return GL_FALSE;
if (!createWindow(window, wndconfig))
return GL_FALSE;
if (wndconfig->mode == GLFW_FULLSCREEN)
{
#if defined(_GLFW_HAS_XRANDR)
// Request screen change notifications
if (_glfwLibrary.X11.RandR.available)
{
XRRSelectInput(_glfwLibrary.X11.display,
window->X11.handle,
RRScreenChangeNotifyMask);
}
#endif /*_GLFW_HAS_XRANDR*/
enterFullscreenMode(window);
}
// Process the window map event and any other that may have arrived
_glfwPlatformPollEvents();
// Retrieve and set initial cursor position
{
Window cursorWindow, cursorRoot;
int windowX, windowY, rootX, rootY;
unsigned int mask;
XQueryPointer(_glfwLibrary.X11.display,
window->X11.handle,
&cursorRoot,
&cursorWindow,
&rootX, &rootY,
&windowX, &windowY,
&mask);
// TODO: Probably check for some corner cases here.
window->cursorPosX = windowX;
window->cursorPosY = windowY;
}
return GL_TRUE;
}
//========================================================================
// Properly kill the window/video display
//========================================================================
void _glfwPlatformCloseWindow(_GLFWwindow* window)
{
if (window->mode == GLFW_FULLSCREEN)
leaveFullscreenMode(window);
if (window->GLX.context)
{
// Release and destroy the context
glXMakeCurrent(_glfwLibrary.X11.display, None, NULL);
glXDestroyContext(_glfwLibrary.X11.display, window->GLX.context);
window->GLX.context = NULL;
}
if (window->GLX.visual)
{
XFree(window->GLX.visual);
window->GLX.visual = NULL;
}
if (window->X11.handle)
{
XUnmapWindow(_glfwLibrary.X11.display, window->X11.handle);
XDestroyWindow(_glfwLibrary.X11.display, window->X11.handle);
window->X11.handle = (Window) 0;
}
if (window->X11.colormap)
{
XFreeColormap(_glfwLibrary.X11.display, window->X11.colormap);
window->X11.colormap = (Colormap) 0;
}
}
//========================================================================
// Set the window title
//========================================================================
void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
{
// Set window & icon title
XStoreName(_glfwLibrary.X11.display, window->X11.handle, title);
XSetIconName(_glfwLibrary.X11.display, window->X11.handle, title);
XChangeProperty(_glfwLibrary.X11.display, window->X11.handle,
XInternAtom(_glfwLibrary.X11.display, "_NET_WM_NAME", False),
XInternAtom(_glfwLibrary.X11.display, "UTF8_STRING", False),
8, PropModeReplace, (unsigned char *) title,
strlen(title));
}
//========================================================================
// Set the window size
//========================================================================
void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height)
{
int mode = 0, rate, sizeChanged = GL_FALSE;
XSizeHints* sizehints;
rate = window->refreshRate;
if (window->mode == GLFW_FULLSCREEN)
{
// Get the closest matching video mode for the specified window size
mode = _glfwGetClosestVideoMode(_glfwLibrary.X11.screen,
&width, &height, &rate);
}
if (!window->resizable)
{
// Update window size restrictions to match new window size
sizehints = XAllocSizeHints();
sizehints->flags = 0;
sizehints->min_width = sizehints->max_width = width;
sizehints->min_height = sizehints->max_height = height;
XSetWMNormalHints(_glfwLibrary.X11.display, window->X11.handle, sizehints);
XFree(sizehints);
}
// Change window size before changing fullscreen mode?
if (window->mode == GLFW_FULLSCREEN && (width > window->width))
{
XResizeWindow(_glfwLibrary.X11.display, window->X11.handle, width, height);
sizeChanged = GL_TRUE;
}
if (window->mode == GLFW_FULLSCREEN)
{
// Change video mode, keeping current refresh rate
_glfwSetVideoModeMODE(_glfwLibrary.X11.screen, mode, window->refreshRate);
}
// Set window size (if not already changed)
if (!sizeChanged)
XResizeWindow(_glfwLibrary.X11.display, window->X11.handle, width, height);
}
//========================================================================
// Set the window position.
//========================================================================
void _glfwPlatformSetWindowPos(_GLFWwindow* window, int x, int y)
{
XMoveWindow(_glfwLibrary.X11.display, window->X11.handle, x, y);
}
//========================================================================
// Window iconification
//========================================================================
void _glfwPlatformIconifyWindow(_GLFWwindow* window)
{
if (window->X11.overrideRedirect)
{
// We can't iconify/restore override-redirect windows, as that's
// performed by the window manager
return;
}
XIconifyWindow(_glfwLibrary.X11.display,
window->X11.handle,
_glfwLibrary.X11.screen);
}
//========================================================================
// Window un-iconification
//========================================================================
void _glfwPlatformRestoreWindow(_GLFWwindow* window)
{
if (window->X11.overrideRedirect)
{
// We can't iconify/restore override-redirect windows, as that's
// performed by the window manager
return;
}
XMapWindow(_glfwLibrary.X11.display, window->X11.handle);
}
//========================================================================
// Read back framebuffer parameters from the context
//========================================================================
void _glfwPlatformRefreshWindowParams(void)
{
int dummy;
GLXFBConfig* fbconfig;
#if defined(_GLFW_HAS_XRANDR)
XRRScreenConfiguration* sc;
#endif /*_GLFW_HAS_XRANDR*/
#if defined(_GLFW_HAS_XF86VIDMODE)
XF86VidModeModeLine modeline;
int dotclock;
float pixels_per_second, pixels_per_frame;
#endif /*_GLFW_HAS_XF86VIDMODE*/
_GLFWwindow* window = _glfwLibrary.currentWindow;
int attribs[] = { GLX_FBCONFIG_ID, window->GLX.fbconfigID, None };
if (window->GLX.SGIX_fbconfig)
{
fbconfig = window->GLX.ChooseFBConfigSGIX(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
attribs,
&dummy);
}
else
{
fbconfig = glXChooseFBConfig(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
attribs,
&dummy);
}
if (fbconfig == NULL)
{
// This should never ever happen
// TODO: Flag this as an error and propagate up
fprintf(stderr, "Cannot find known GLXFBConfig by ID. "
"This cannot happen. Have a nice day.\n");
abort();
}
// There is no clear definition of an "accelerated" context on X11/GLX, and
// true sounds better than false, so we hardcode true here
window->accelerated = GL_TRUE;
window->redBits = getFBConfigAttrib(window, *fbconfig, GLX_RED_SIZE);
window->greenBits = getFBConfigAttrib(window, *fbconfig, GLX_GREEN_SIZE);
window->blueBits = getFBConfigAttrib(window, *fbconfig, GLX_BLUE_SIZE);
window->alphaBits = getFBConfigAttrib(window, *fbconfig, GLX_ALPHA_SIZE);
window->depthBits = getFBConfigAttrib(window, *fbconfig, GLX_DEPTH_SIZE);
window->stencilBits = getFBConfigAttrib(window, *fbconfig, GLX_STENCIL_SIZE);
window->accumRedBits = getFBConfigAttrib(window, *fbconfig, GLX_ACCUM_RED_SIZE);
window->accumGreenBits = getFBConfigAttrib(window, *fbconfig, GLX_ACCUM_GREEN_SIZE);
window->accumBlueBits = getFBConfigAttrib(window, *fbconfig, GLX_ACCUM_BLUE_SIZE);
window->accumAlphaBits = getFBConfigAttrib(window, *fbconfig, GLX_ACCUM_ALPHA_SIZE);
window->auxBuffers = getFBConfigAttrib(window, *fbconfig, GLX_AUX_BUFFERS);
window->stereo = getFBConfigAttrib(window, *fbconfig, GLX_STEREO) ? GL_TRUE : GL_FALSE;
// Get FSAA buffer sample count
if (window->GLX.ARB_multisample)
window->samples = getFBConfigAttrib(window, *fbconfig, GLX_SAMPLES);
else
window->samples = 0;
// Retrieve refresh rate if possible
if (_glfwLibrary.X11.RandR.available)
{
#if defined(_GLFW_HAS_XRANDR)
sc = XRRGetScreenInfo(_glfwLibrary.X11.display, _glfwLibrary.X11.root);
window->refreshRate = XRRConfigCurrentRate(sc);
XRRFreeScreenConfigInfo(sc);
#endif /*_GLFW_HAS_XRANDR*/
}
else if (_glfwLibrary.X11.VidMode.available)
{
#if defined(_GLFW_HAS_XF86VIDMODE)
// Use the XF86VidMode extension to get current video mode
XF86VidModeGetModeLine(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
&dotclock, &modeline);
pixels_per_second = 1000.0f * (float) dotclock;
pixels_per_frame = (float) modeline.htotal * modeline.vtotal;
window->refreshRate = (int) (pixels_per_second / pixels_per_frame + 0.5);
#endif /*_GLFW_HAS_XF86VIDMODE*/
}
else
{
// Zero means unknown according to the GLFW spec
window->refreshRate = 0;
}
XFree(fbconfig);
}
//========================================================================
// Poll for new window and input events
//========================================================================
void _glfwPlatformPollEvents(void)
{
_GLFWwindow* window;
// Process all pending events
while (XPending(_glfwLibrary.X11.display))
processSingleEvent();
// Did the cursor move in an active window that has captured the cursor
window = _glfwLibrary.activeWindow;
if (window)
{
if (window->cursorMode == GLFW_CURSOR_CAPTURED &&
!window->X11.cursorCentered)
{
_glfwPlatformSetMouseCursorPos(window,
window->width / 2,
window->height / 2);
window->X11.cursorCentered = GL_TRUE;
// NOTE: This is a temporary fix. It works as long as you use
// offsets accumulated over the course of a frame, instead of
// performing the necessary actions per callback call.
XFlush( _glfwLibrary.X11.display );
}
}
}
//========================================================================
// Wait for new window and input events
//========================================================================
void _glfwPlatformWaitEvents(void)
{
XEvent event;
// Block waiting for an event to arrive
XNextEvent(_glfwLibrary.X11.display, &event);
XPutBackEvent(_glfwLibrary.X11.display, &event);
_glfwPlatformPollEvents();
}
//========================================================================
// Set physical mouse cursor position
//========================================================================
void _glfwPlatformSetMouseCursorPos(_GLFWwindow* window, int x, int y)
{
// Store the new position so we can recognise it later
window->X11.cursorPosX = x;
window->X11.cursorPosY = y;
XWarpPointer(_glfwLibrary.X11.display, None, window->X11.handle, 0,0,0,0, x, y);
}
//========================================================================
// Set physical mouse cursor mode
//========================================================================
void _glfwPlatformSetCursorMode(_GLFWwindow* window, int mode)
{
switch (mode)
{
case GLFW_CURSOR_NORMAL:
showMouseCursor(window);
break;
case GLFW_CURSOR_HIDDEN:
hideMouseCursor(window);
break;
case GLFW_CURSOR_CAPTURED:
captureMouseCursor(window);
break;
}
}
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