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glfw/lib/x11/x11_window.c
Camilla Berglund cdfbbaf78b Made system header inclusion more conservative.
2010-09-08 17:01:39 +02:00

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//========================================================================
// GLFW - An OpenGL framework
// 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>
/* Define GLX 1.4 FSAA tokens if not already defined */
#ifndef GLX_VERSION_1_4
#define GLX_SAMPLE_BUFFERS 100000
#define GLX_SAMPLES 100001
#endif /*GLX_VERSION_1_4*/
// Action for EWMH client messages
#define _NET_WM_STATE_REMOVE 0
#define _NET_WM_STATE_ADD 1
#define _NET_WM_STATE_TOGGLE 2
//************************************************************************
//**** GLFW internal functions ****
//************************************************************************
//========================================================================
// 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.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.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 checkForEWMH(void)
{
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.display,
"_NET_SUPPORTING_WM_CHECK",
True);
Atom wmSupported = XInternAtom(_glfwLibrary.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(_glfwWin.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
atomCount = getWindowProperty(_glfwWin.root,
wmSupported,
XA_ATOM,
(unsigned char**) &supportedAtoms);
// See which of the atoms we support that are supported by the WM
_glfwWin.wmState = getSupportedAtom(supportedAtoms,
atomCount,
"_NET_WM_STATE");
_glfwWin.wmStateFullscreen = getSupportedAtom(supportedAtoms,
atomCount,
"_NET_WM_STATE_FULLSCREEN");
_glfwWin.wmPing = getSupportedAtom(supportedAtoms,
atomCount,
"_NET_WM_PING");
_glfwWin.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)
{
KeySym key, key_lc, key_uc;
// Try secondary keysym, for numeric keypad keys
// Note: This way we always force "NumLock = ON", which at least
// enables GLFW users to detect numeric keypad keys
key = XKeycodeToKeysym(_glfwLibrary.display, keycode, 1);
switch (key)
{
// Numeric keypad
case XK_KP_0: return GLFW_KEY_KP_0;
case XK_KP_1: return GLFW_KEY_KP_1;
case XK_KP_2: return GLFW_KEY_KP_2;
case XK_KP_3: return GLFW_KEY_KP_3;
case XK_KP_4: return GLFW_KEY_KP_4;
case XK_KP_5: return GLFW_KEY_KP_5;
case XK_KP_6: return GLFW_KEY_KP_6;
case XK_KP_7: return GLFW_KEY_KP_7;
case XK_KP_8: return GLFW_KEY_KP_8;
case XK_KP_9: return GLFW_KEY_KP_9;
case XK_KP_Separator:
case XK_KP_Decimal: return GLFW_KEY_KP_DECIMAL;
case XK_KP_Equal: return GLFW_KEY_KP_EQUAL;
case XK_KP_Enter: return GLFW_KEY_KP_ENTER;
default: break;
}
// Now try pimary keysym
key = XKeycodeToKeysym(_glfwLibrary.display, keycode, 0);
switch (key)
{
// Special keys (non character keys)
case XK_Escape: return GLFW_KEY_ESC;
case XK_Tab: return GLFW_KEY_TAB;
case XK_Shift_L: return GLFW_KEY_LSHIFT;
case XK_Shift_R: return GLFW_KEY_RSHIFT;
case XK_Control_L: return GLFW_KEY_LCTRL;
case XK_Control_R: return GLFW_KEY_RCTRL;
case XK_Meta_L:
case XK_Alt_L: return GLFW_KEY_LALT;
case XK_Mode_switch: // Mapped to Alt_R on many keyboards
case XK_Meta_R:
case XK_ISO_Level3_Shift: // AltGr on at least some machines
case XK_Alt_R: return GLFW_KEY_RALT;
case XK_Super_L: return GLFW_KEY_LSUPER;
case XK_Super_R: return GLFW_KEY_RSUPER;
case XK_Menu: return GLFW_KEY_MENU;
case XK_Num_Lock: return GLFW_KEY_KP_NUM_LOCK;
case XK_Caps_Lock: return GLFW_KEY_CAPS_LOCK;
case XK_Scroll_Lock: return GLFW_KEY_SCROLL_LOCK;
case XK_Pause: return GLFW_KEY_PAUSE;
case XK_KP_Delete:
case XK_Delete: return GLFW_KEY_DEL;
case XK_BackSpace: return GLFW_KEY_BACKSPACE;
case XK_Return: return GLFW_KEY_ENTER;
case XK_KP_Home:
case XK_Home: return GLFW_KEY_HOME;
case XK_KP_End:
case XK_End: return GLFW_KEY_END;
case XK_KP_Page_Up:
case XK_Page_Up: return GLFW_KEY_PAGEUP;
case XK_KP_Page_Down:
case XK_Page_Down: return GLFW_KEY_PAGEDOWN;
case XK_KP_Insert:
case XK_Insert: return GLFW_KEY_INSERT;
case XK_KP_Left:
case XK_Left: return GLFW_KEY_LEFT;
case XK_KP_Right:
case XK_Right: return GLFW_KEY_RIGHT;
case XK_KP_Down:
case XK_Down: return GLFW_KEY_DOWN;
case XK_KP_Up:
case XK_Up: return GLFW_KEY_UP;
case XK_F1: return GLFW_KEY_F1;
case XK_F2: return GLFW_KEY_F2;
case XK_F3: return GLFW_KEY_F3;
case XK_F4: return GLFW_KEY_F4;
case XK_F5: return GLFW_KEY_F5;
case XK_F6: return GLFW_KEY_F6;
case XK_F7: return GLFW_KEY_F7;
case XK_F8: return GLFW_KEY_F8;
case XK_F9: return GLFW_KEY_F9;
case XK_F10: return GLFW_KEY_F10;
case XK_F11: return GLFW_KEY_F11;
case XK_F12: return GLFW_KEY_F12;
case XK_F13: return GLFW_KEY_F13;
case XK_F14: return GLFW_KEY_F14;
case XK_F15: return GLFW_KEY_F15;
case XK_F16: return GLFW_KEY_F16;
case XK_F17: return GLFW_KEY_F17;
case XK_F18: return GLFW_KEY_F18;
case XK_F19: return GLFW_KEY_F19;
case XK_F20: return GLFW_KEY_F20;
case XK_F21: return GLFW_KEY_F21;
case XK_F22: return GLFW_KEY_F22;
case XK_F23: return GLFW_KEY_F23;
case XK_F24: return GLFW_KEY_F24;
case XK_F25: return GLFW_KEY_F25;
// Numeric keypad (should have been detected in secondary keysym!)
case XK_KP_Divide: return GLFW_KEY_KP_DIVIDE;
case XK_KP_Multiply: return GLFW_KEY_KP_MULTIPLY;
case XK_KP_Subtract: return GLFW_KEY_KP_SUBTRACT;
case XK_KP_Add: return GLFW_KEY_KP_ADD;
case XK_KP_Equal: return GLFW_KEY_KP_EQUAL;
case XK_KP_Enter: return GLFW_KEY_KP_ENTER;
// The rest (should be printable keys)
default:
// Make uppercase
XConvertCase(key, &key_lc, &key_uc);
key = key_uc;
// Valid ISO 8859-1 character?
if ((key >= 32 && key <= 126) || (key >= 160 && key <= 255))
return (int) key;
return GLFW_KEY_UNKNOWN;
}
}
//========================================================================
// 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);
}
//========================================================================
// Create a blank cursor (for locked mouse mode)
//========================================================================
static Cursor createNULLCursor(Display* display, Window root)
{
Pixmap cursormask;
XGCValues xgc;
GC gc;
XColor col;
Cursor cursor;
cursormask = XCreatePixmap(display, root, 1, 1, 1);
xgc.function = GXclear;
gc = XCreateGC(display, cursormask, GCFunction, &xgc);
XFillRectangle(display, cursormask, gc, 0, 0, 1, 1);
col.pixel = 0;
col.red = 0;
col.flags = 4;
cursor = XCreatePixmapCursor(display, cursormask, cursormask,
&col,&col, 0,0);
XFreePixmap(display, cursormask);
XFreeGC(display, gc);
return cursor;
}
//========================================================================
// 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(GLXFBConfig fbconfig, int attrib)
{
int value;
if (_glfwWin.has_GLX_SGIX_fbconfig)
{
_glfwWin.GetFBConfigAttribSGIX(_glfwLibrary.display,
fbconfig, attrib, &value);
}
else
glXGetFBConfigAttrib(_glfwLibrary.display, fbconfig, attrib, &value);
return value;
}
//========================================================================
// Return a list of available and usable framebuffer configs
//========================================================================
static _GLFWfbconfig* getFBConfigs(unsigned int* found)
{
GLXFBConfig* fbconfigs;
_GLFWfbconfig* result;
int i, count = 0;
*found = 0;
if (_glfwLibrary.glxMajor == 1 && _glfwLibrary.glxMinor < 3)
{
if (!_glfwWin.has_GLX_SGIX_fbconfig)
{
fprintf(stderr, "GLXFBConfigs are not supported by the X server\n");
return NULL;
}
}
if (_glfwWin.has_GLX_SGIX_fbconfig)
{
fbconfigs = _glfwWin.ChooseFBConfigSGIX(_glfwLibrary.display,
_glfwWin.screen,
NULL,
&count);
if (!count)
{
fprintf(stderr, "No GLXFBConfigs returned\n");
return NULL;
}
}
else
{
fbconfigs = glXGetFBConfigs(_glfwLibrary.display, _glfwWin.screen, &count);
if (!count)
{
fprintf(stderr, "No GLXFBConfigs returned\n");
return NULL;
}
}
result = (_GLFWfbconfig*) malloc(sizeof(_GLFWfbconfig) * count);
if (!result)
{
fprintf(stderr, "Out of memory\n");
return NULL;
}
for (i = 0; i < count; i++)
{
if (!getFBConfigAttrib(fbconfigs[i], GLX_DOUBLEBUFFER) ||
!getFBConfigAttrib(fbconfigs[i], GLX_VISUAL_ID))
{
// Only consider double-buffered GLXFBConfigs with associated visuals
continue;
}
if (!(getFBConfigAttrib(fbconfigs[i], GLX_RENDER_TYPE) & GLX_RGBA_BIT))
{
// Only consider RGBA GLXFBConfigs
continue;
}
if (!(getFBConfigAttrib(fbconfigs[i], GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
{
// Only consider window GLXFBConfigs
continue;
}
result[*found].redBits = getFBConfigAttrib(fbconfigs[i], GLX_RED_SIZE);
result[*found].greenBits = getFBConfigAttrib(fbconfigs[i], GLX_GREEN_SIZE);
result[*found].blueBits = getFBConfigAttrib(fbconfigs[i], GLX_BLUE_SIZE);
result[*found].alphaBits = getFBConfigAttrib(fbconfigs[i], GLX_ALPHA_SIZE);
result[*found].depthBits = getFBConfigAttrib(fbconfigs[i], GLX_DEPTH_SIZE);
result[*found].stencilBits = getFBConfigAttrib(fbconfigs[i], GLX_STENCIL_SIZE);
result[*found].accumRedBits = getFBConfigAttrib(fbconfigs[i], GLX_ACCUM_RED_SIZE);
result[*found].accumGreenBits = getFBConfigAttrib(fbconfigs[i], GLX_ACCUM_GREEN_SIZE);
result[*found].accumBlueBits = getFBConfigAttrib(fbconfigs[i], GLX_ACCUM_BLUE_SIZE);
result[*found].accumAlphaBits = getFBConfigAttrib(fbconfigs[i], GLX_ACCUM_ALPHA_SIZE);
result[*found].auxBuffers = getFBConfigAttrib(fbconfigs[i], GLX_AUX_BUFFERS);
result[*found].stereo = getFBConfigAttrib(fbconfigs[i], GLX_STEREO);
if (_glfwWin.has_GLX_ARB_multisample)
result[*found].samples = getFBConfigAttrib(fbconfigs[i], GLX_SAMPLES);
else
result[*found].samples = 0;
result[*found].platformID = (GLFWintptr) getFBConfigAttrib(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(const _GLFWwndconfig* wndconfig, GLXFBConfigID fbconfigID)
{
int attribs[40];
int flags, dummy, index;
GLXFBConfig* fbconfig;
// Retrieve the previously selected GLXFBConfig
{
index = 0;
setGLXattrib(attribs, index, GLX_FBCONFIG_ID, (int) fbconfigID);
setGLXattrib(attribs, index, None, None);
if (_glfwWin.has_GLX_SGIX_fbconfig)
{
fbconfig = _glfwWin.ChooseFBConfigSGIX(_glfwLibrary.display,
_glfwWin.screen,
attribs,
&dummy);
}
else
{
fbconfig = glXChooseFBConfig(_glfwLibrary.display,
_glfwWin.screen,
attribs,
&dummy);
}
if (fbconfig == NULL)
{
fprintf(stderr, "Unable to retrieve the selected GLXFBConfig\n");
return GL_FALSE;
}
}
// Retrieve the corresponding visual
if (_glfwWin.has_GLX_SGIX_fbconfig)
{
_glfwWin.visual = _glfwWin.GetVisualFromFBConfigSGIX(_glfwLibrary.display,
*fbconfig);
}
else
{
_glfwWin.visual = glXGetVisualFromFBConfig(_glfwLibrary.display,
*fbconfig);
}
if (_glfwWin.visual == NULL)
{
XFree(fbconfig);
fprintf(stderr, "Unable to retrieve visual for GLXFBconfig\n");
return GL_FALSE;
}
if (_glfwWin.has_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)
{
flags = 0;
if (wndconfig->glForward)
flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (wndconfig->glDebug)
flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
setGLXattrib(attribs, index, GLX_CONTEXT_FLAGS_ARB, flags);
}
if (wndconfig->glProfile)
{
if (!_glfwWin.has_GLX_ARB_create_context_profile)
{
fprintf(stderr, "OpenGL profile requested but GLX_ARB_create_context_profile "
"is unavailable\n");
return GL_FALSE;
}
if (wndconfig->glProfile == GLFW_OPENGL_CORE_PROFILE)
flags = GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
else
flags = GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
setGLXattrib(attribs, index, GLX_CONTEXT_PROFILE_MASK_ARB, flags);
}
setGLXattrib(attribs, index, None, None);
_glfwWin.context = _glfwWin.CreateContextAttribsARB(_glfwLibrary.display,
*fbconfig,
NULL,
True,
attribs);
}
else
{
if (_glfwWin.has_GLX_SGIX_fbconfig)
{
_glfwWin.context = _glfwWin.CreateContextWithConfigSGIX(_glfwLibrary.display,
*fbconfig,
GLX_RGBA_TYPE,
NULL,
True);
}
else
{
_glfwWin.context = glXCreateNewContext(_glfwLibrary.display,
*fbconfig,
GLX_RGBA_TYPE,
NULL,
True);
}
}
XFree(fbconfig);
if (_glfwWin.context == NULL)
{
fprintf(stderr, "Unable to create OpenGL context\n");
return GL_FALSE;
}
_glfwWin.fbconfigID = fbconfigID;
return GL_TRUE;
}
#undef setGLXattrib
//========================================================================
// Initialize GLX-specific extensions
//========================================================================
static void initGLXExtensions(void)
{
// This needs to include every function pointer loaded below
_glfwWin.SwapIntervalSGI = NULL;
_glfwWin.GetFBConfigAttribSGIX = NULL;
_glfwWin.ChooseFBConfigSGIX = NULL;
_glfwWin.CreateContextWithConfigSGIX = NULL;
_glfwWin.GetVisualFromFBConfigSGIX = NULL;
_glfwWin.CreateContextAttribsARB = NULL;
// This needs to include every extension used below
_glfwWin.has_GLX_SGIX_fbconfig = GL_FALSE;
_glfwWin.has_GLX_SGI_swap_control = GL_FALSE;
_glfwWin.has_GLX_ARB_multisample = GL_FALSE;
_glfwWin.has_GLX_ARB_create_context = GL_FALSE;
_glfwWin.has_GLX_ARB_create_context_profile = GL_FALSE;
if (_glfwPlatformExtensionSupported("GLX_SGI_swap_control"))
{
_glfwWin.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)
_glfwPlatformGetProcAddress("glXSwapIntervalSGI");
if (_glfwWin.SwapIntervalSGI)
_glfwWin.has_GLX_SGI_swap_control = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("GLX_SGIX_fbconfig"))
{
_glfwWin.GetFBConfigAttribSGIX = (PFNGLXGETFBCONFIGATTRIBSGIXPROC)
_glfwPlatformGetProcAddress("glXGetFBConfigAttribSGIX");
_glfwWin.ChooseFBConfigSGIX = (PFNGLXCHOOSEFBCONFIGSGIXPROC)
_glfwPlatformGetProcAddress("glXChooseFBConfigSGIX");
_glfwWin.CreateContextWithConfigSGIX = (PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC)
_glfwPlatformGetProcAddress("glXCreateContextWithConfigSGIX");
_glfwWin.GetVisualFromFBConfigSGIX = (PFNGLXGETVISUALFROMFBCONFIGSGIXPROC)
_glfwPlatformGetProcAddress("glXGetVisualFromFBConfigSGIX");
if (_glfwWin.GetFBConfigAttribSGIX &&
_glfwWin.ChooseFBConfigSGIX &&
_glfwWin.CreateContextWithConfigSGIX &&
_glfwWin.GetVisualFromFBConfigSGIX)
{
_glfwWin.has_GLX_SGIX_fbconfig = GL_TRUE;
}
}
if (_glfwPlatformExtensionSupported("GLX_ARB_multisample"))
_glfwWin.has_GLX_ARB_multisample = GL_TRUE;
if (_glfwPlatformExtensionSupported("GLX_ARB_create_context"))
{
_glfwWin.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
_glfwPlatformGetProcAddress("glXCreateContextAttribsARB");
if (_glfwWin.CreateContextAttribsARB)
_glfwWin.has_GLX_ARB_create_context = GL_TRUE;
}
if (_glfwPlatformExtensionSupported("GLX_ARB_create_context_profile"))
_glfwWin.has_GLX_ARB_create_context_profile = GL_TRUE;
}
//========================================================================
// Create the X11 window (and its colormap)
//========================================================================
static GLboolean createWindow(int width, int height,
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
_glfwWin.colormap = XCreateColormap(_glfwLibrary.display,
_glfwWin.root,
_glfwWin.visual->visual,
AllocNone);
// Create the actual window
{
wamask = CWBorderPixel | CWColormap | CWEventMask;
wa.colormap = _glfwWin.colormap;
wa.border_pixel = 0;
wa.event_mask = StructureNotifyMask | KeyPressMask | KeyReleaseMask |
PointerMotionMask | ButtonPressMask | ButtonReleaseMask |
ExposureMask | FocusChangeMask | VisibilityChangeMask;
if (wndconfig->mode == GLFW_WINDOW)
{
// 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.display, _glfwWin.screen);
wamask |= CWBackPixel;
}
_glfwWin.window = XCreateWindow(
_glfwLibrary.display,
_glfwWin.root,
0, 0, // Upper left corner of this window on root
_glfwWin.width, _glfwWin.height,
0, // Border width
_glfwWin.visual->depth, // Color depth
InputOutput,
_glfwWin.visual->visual,
wamask,
&wa
);
if (!_glfwWin.window)
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
}
// Check whether an EWMH-compliant window manager is running
_glfwWin.hasEWMH = checkForEWMH();
if (_glfwWin.fullscreen && !_glfwWin.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.display,
_glfwWin.window,
CWOverrideRedirect,
&attributes);
_glfwWin.overrideRedirect = GL_TRUE;
}
// Find or create the protocol atom for window close notifications
_glfwWin.wmDeleteWindow = XInternAtom(_glfwLibrary.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 (_glfwWin.wmDeleteWindow != None)
protocols[count++] = _glfwWin.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 (_glfwWin.wmPing != None)
protocols[count++] = _glfwWin.wmPing;
if (count > 0)
{
XSetWMProtocols(_glfwLibrary.display, _glfwWin.window,
protocols, count);
}
}
// Set ICCCM WM_HINTS property
{
XWMHints* hints = XAllocWMHints();
if (!hints)
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
hints->flags = StateHint;
hints->initial_state = NormalState;
XSetWMHints(_glfwLibrary.display, _glfwWin.window, hints);
XFree(hints);
}
// Set ICCCM WM_NORMAL_HINTS property (even if no parts are set)
{
XSizeHints* hints = XAllocSizeHints();
if (!hints)
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
hints->flags = 0;
if (wndconfig->windowNoResize)
{
hints->flags |= (PMinSize | PMaxSize);
hints->min_width = hints->max_width = _glfwWin.width;
hints->min_height = hints->max_height = _glfwWin.height;
}
XSetWMNormalHints(_glfwLibrary.display, _glfwWin.window, hints);
XFree(hints);
}
_glfwPlatformSetWindowTitle("GLFW Window");
// Make sure the window is mapped before proceeding
XMapWindow(_glfwLibrary.display, _glfwWin.window);
XPeekIfEvent(_glfwLibrary.display, &event, isMapNotify,
(char*) _glfwWin.window);
return GL_TRUE;
}
//========================================================================
// Enter fullscreen mode
//========================================================================
static void enterFullscreenMode(void)
{
if (!_glfwWin.Saver.changed)
{
// Remember old screen saver settings
XGetScreenSaver(_glfwLibrary.display,
&_glfwWin.Saver.timeout, &_glfwWin.Saver.interval,
&_glfwWin.Saver.blanking, &_glfwWin.Saver.exposure);
// Disable screen saver
XSetScreenSaver(_glfwLibrary.display, 0, 0, DontPreferBlanking,
DefaultExposures);
_glfwWin.Saver.changed = GL_TRUE;
}
_glfwSetVideoMode(_glfwWin.screen,
&_glfwWin.width, &_glfwWin.height,
&_glfwWin.refreshRate);
if (_glfwWin.hasEWMH &&
_glfwWin.wmState != None &&
_glfwWin.wmStateFullscreen != None)
{
if (_glfwWin.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 = _glfwWin.window;
event.xclient.format = 32; // Data is 32-bit longs
event.xclient.message_type = _glfwWin.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.display,
_glfwWin.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 = _glfwWin.window;
event.xclient.format = 32; // Data is 32-bit longs
event.xclient.message_type = _glfwWin.wmState;
event.xclient.data.l[0] = _NET_WM_STATE_ADD;
event.xclient.data.l[1] = _glfwWin.wmStateFullscreen;
event.xclient.data.l[2] = 0; // No secondary property
event.xclient.data.l[3] = 1; // Sender is a normal application
XSendEvent(_glfwLibrary.display,
_glfwWin.root,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&event);
}
else if (_glfwWin.overrideRedirect)
{
// In override-redirect mode, we have divorced ourselves from the
// window manager, so we need to do everything manually
XRaiseWindow(_glfwLibrary.display, _glfwWin.window);
XSetInputFocus(_glfwLibrary.display, _glfwWin.window,
RevertToParent, CurrentTime);
XMoveWindow(_glfwLibrary.display, _glfwWin.window, 0, 0);
XResizeWindow(_glfwLibrary.display, _glfwWin.window,
_glfwWin.width, _glfwWin.height);
}
if (_glfwWin.mouseLock)
_glfwPlatformHideMouseCursor();
// 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.display, None, _glfwWin.window, 0,0,0,0, 0,0);
XWarpPointer(_glfwLibrary.display, None, _glfwWin.window, 0,0,0,0,
_glfwWin.width / 2, _glfwWin.height / 2);
}
//========================================================================
// Leave fullscreen mode
//========================================================================
static void leaveFullscreenMode(void)
{
_glfwRestoreVideoMode();
// Did we change the screen saver setting?
if (_glfwWin.Saver.changed)
{
// Restore old screen saver settings
XSetScreenSaver(_glfwLibrary.display,
_glfwWin.Saver.timeout,
_glfwWin.Saver.interval,
_glfwWin.Saver.blanking,
_glfwWin.Saver.exposure);
_glfwWin.Saver.changed = GL_FALSE;
}
if (_glfwWin.hasEWMH &&
_glfwWin.wmState != None &&
_glfwWin.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 = _glfwWin.window;
event.xclient.format = 32; // Data is 32-bit longs
event.xclient.message_type = _glfwWin.wmState;
event.xclient.data.l[0] = _NET_WM_STATE_REMOVE;
event.xclient.data.l[1] = _glfwWin.wmStateFullscreen;
event.xclient.data.l[2] = 0; // No secondary property
event.xclient.data.l[3] = 1; // Sender is a normal application
XSendEvent(_glfwLibrary.display,
_glfwWin.root,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&event);
}
if (_glfwWin.mouseLock)
_glfwPlatformShowMouseCursor();
}
//========================================================================
// Get and process next X event (called by _glfwPlatformPollEvents)
// Returns GL_TRUE if a window close request was received
//========================================================================
static GLboolean processSingleEvent(void)
{
XEvent event;
XNextEvent(_glfwLibrary.display, &event);
switch (event.type)
{
case KeyPress:
{
// A keyboard key was pressed
// Translate and report key press
_glfwInputKey(translateKey(event.xkey.keycode), GLFW_PRESS);
// Translate and report character input
if (_glfwWin.charCallback)
_glfwInputChar(translateChar(&event.xkey), GLFW_PRESS);
break;
}
case KeyRelease:
{
// A keyboard key was released
// 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.display, QueuedAfterReading))
{
XEvent nextEvent;
XPeekEvent(_glfwLibrary.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(translateKey(event.xkey.keycode), GLFW_RELEASE);
// Translate and report character input
if (_glfwWin.charCallback)
_glfwInputChar(translateChar(&event.xkey), GLFW_RELEASE);
break;
}
case ButtonPress:
{
// A mouse button was pressed or a scrolling event occurred
if (event.xbutton.button == Button1)
_glfwInputMouseClick(GLFW_MOUSE_BUTTON_LEFT, GLFW_PRESS);
else if (event.xbutton.button == Button2)
_glfwInputMouseClick(GLFW_MOUSE_BUTTON_MIDDLE, GLFW_PRESS);
else if (event.xbutton.button == Button3)
_glfwInputMouseClick(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)
{
_glfwInput.WheelPos++; // To verify: is this up or down?
if (_glfwWin.mouseWheelCallback)
_glfwWin.mouseWheelCallback(_glfwInput.WheelPos);
}
else if (event.xbutton.button == Button5)
{
_glfwInput.WheelPos--;
if (_glfwWin.mouseWheelCallback)
_glfwWin.mouseWheelCallback(_glfwInput.WheelPos);
}
break;
}
case ButtonRelease:
{
// A mouse button was released
if (event.xbutton.button == Button1)
{
_glfwInputMouseClick(GLFW_MOUSE_BUTTON_LEFT,
GLFW_RELEASE);
}
else if (event.xbutton.button == Button2)
{
_glfwInputMouseClick(GLFW_MOUSE_BUTTON_MIDDLE,
GLFW_RELEASE);
}
else if (event.xbutton.button == Button3)
{
_glfwInputMouseClick(GLFW_MOUSE_BUTTON_RIGHT,
GLFW_RELEASE);
}
break;
}
case MotionNotify:
{
// The mouse cursor was moved
if (event.xmotion.x != _glfwInput.CursorPosX ||
event.xmotion.y != _glfwInput.CursorPosY)
{
// The mouse cursor was moved and we didn't do it
if (_glfwWin.mouseLock)
{
if (_glfwWin.pointerHidden)
{
_glfwInput.MousePosX += event.xmotion.x -
_glfwInput.CursorPosX;
_glfwInput.MousePosY += event.xmotion.y -
_glfwInput.CursorPosY;
}
}
else
{
_glfwInput.MousePosX = event.xmotion.x;
_glfwInput.MousePosY = event.xmotion.y;
}
_glfwInput.CursorPosX = event.xmotion.x;
_glfwInput.CursorPosY = event.xmotion.y;
_glfwInput.MouseMoved = GL_TRUE;
if (_glfwWin.mousePosCallback)
{
_glfwWin.mousePosCallback(_glfwInput.MousePosX,
_glfwInput.MousePosY);
}
}
break;
}
case ConfigureNotify:
{
if (event.xconfigure.width != _glfwWin.width ||
event.xconfigure.height != _glfwWin.height)
{
// The window was resized
_glfwWin.width = event.xconfigure.width;
_glfwWin.height = event.xconfigure.height;
if (_glfwWin.windowSizeCallback)
{
_glfwWin.windowSizeCallback(_glfwWin.width,
_glfwWin.height);
}
}
break;
}
case ClientMessage:
{
if ((Atom) event.xclient.data.l[ 0 ] == _glfwWin.wmDeleteWindow)
{
// The window manager was asked to close the window, for example by
// the user pressing a 'close' window decoration button
return GL_TRUE;
}
else if (_glfwWin.wmPing != None &&
(Atom) event.xclient.data.l[ 0 ] == _glfwWin.wmPing)
{
// The window manager is pinging us to make sure we are still
// responding to events
event.xclient.window = _glfwWin.root;
XSendEvent(_glfwLibrary.display,
event.xclient.window,
False,
SubstructureNotifyMask | SubstructureRedirectMask,
&event);
}
break;
}
case MapNotify:
{
// The window was mapped
_glfwWin.iconified = GL_FALSE;
break;
}
case UnmapNotify:
{
// The window was unmapped
_glfwWin.iconified = GL_TRUE;
break;
}
case FocusIn:
{
// The window gained focus
_glfwWin.active = GL_TRUE;
if (_glfwWin.mouseLock)
_glfwPlatformHideMouseCursor();
break;
}
case FocusOut:
{
// The window lost focus
_glfwWin.active = GL_FALSE;
_glfwInputDeactivation();
if (_glfwWin.mouseLock)
_glfwPlatformShowMouseCursor();
break;
}
case Expose:
{
// The window's contents was damaged
if (_glfwWin.windowRefreshCallback)
_glfwWin.windowRefreshCallback();
break;
}
// Was the window destroyed?
case DestroyNotify:
return GL_FALSE;
default:
{
#if defined(_GLFW_HAS_XRANDR)
switch (event.type - _glfwLibrary.XRandR.eventBase)
{
case RRScreenChangeNotify:
{
// Show XRandR that we really care
XRRUpdateConfiguration(&event);
break;
}
}
#endif
break;
}
}
// The window was not destroyed
return GL_FALSE;
}
//************************************************************************
//**** Platform implementation functions ****
//************************************************************************
//========================================================================
// Here is where the window is created, and
// the OpenGL rendering context is created
//========================================================================
int _glfwPlatformOpenWindow(int width, int height,
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig)
{
_GLFWfbconfig closest;
// Clear platform specific GLFW window state
_glfwWin.visual = (XVisualInfo*)NULL;
_glfwWin.colormap = (Colormap)0;
_glfwWin.context = (GLXContext)NULL;
_glfwWin.window = (Window)0;
_glfwWin.pointerGrabbed = GL_FALSE;
_glfwWin.pointerHidden = GL_FALSE;
_glfwWin.keyboardGrabbed = GL_FALSE;
_glfwWin.overrideRedirect = GL_FALSE;
_glfwWin.FS.modeChanged = GL_FALSE;
_glfwWin.Saver.changed = GL_FALSE;
_glfwWin.refreshRate = wndconfig->refreshRate;
_glfwWin.windowNoResize = wndconfig->windowNoResize;
_glfwWin.wmDeleteWindow = None;
_glfwWin.wmPing = None;
_glfwWin.wmState = None;
_glfwWin.wmStateFullscreen = None;
_glfwWin.wmActiveWindow = None;
// As the 2.x API doesn't understand multiple display devices, we hardcode
// this choice and hope for the best
_glfwWin.screen = DefaultScreen(_glfwLibrary.display);
_glfwWin.root = RootWindow(_glfwLibrary.display, _glfwWin.screen);
// Create the invisible cursor for hidden cursor mode
_glfwWin.cursor = createNULLCursor(_glfwLibrary.display, _glfwWin.root);
initGLXExtensions();
// Choose the best available fbconfig
{
unsigned int fbcount;
_GLFWfbconfig* fbconfigs;
const _GLFWfbconfig* result;
fbconfigs = getFBConfigs(&fbcount);
if (!fbconfigs)
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
result = _glfwChooseFBConfig(fbconfig, fbconfigs, fbcount);
if (!result)
{
free(fbconfigs);
_glfwPlatformCloseWindow();
return GL_FALSE;
}
closest = *result;
free(fbconfigs);
}
if (!createContext(wndconfig, (GLXFBConfigID) closest.platformID))
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
if (!createWindow(width, height, wndconfig))
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
if (wndconfig->mode == GLFW_FULLSCREEN)
{
#if defined(_GLFW_HAS_XRANDR)
// Request screen change notifications
if (_glfwLibrary.XRandR.available)
{
XRRSelectInput(_glfwLibrary.display,
_glfwWin.window,
RRScreenChangeNotifyMask);
}
#endif
enterFullscreenMode();
}
// Process the window map event and any other that may have arrived
_glfwPlatformPollEvents();
// Retrieve and set initial cursor position
{
Window window, root;
int windowX, windowY, rootX, rootY;
unsigned int mask;
XQueryPointer(_glfwLibrary.display,
_glfwWin.window,
&root,
&window,
&rootX, &rootY,
&windowX, &windowY,
&mask);
// TODO: Probably check for some corner cases here.
_glfwInput.MousePosX = windowX;
_glfwInput.MousePosY = windowY;
}
// Connect the context to the window
glXMakeCurrent(_glfwLibrary.display, _glfwWin.window, _glfwWin.context);
return GL_TRUE;
}
//========================================================================
// Properly kill the window/video display
//========================================================================
void _glfwPlatformCloseWindow(void)
{
if (_glfwWin.fullscreen)
leaveFullscreenMode();
if (_glfwWin.context)
{
// Release and destroy the context
glXMakeCurrent(_glfwLibrary.display, None, NULL);
glXDestroyContext(_glfwLibrary.display, _glfwWin.context);
_glfwWin.context = NULL;
}
if (_glfwWin.visual)
{
XFree(_glfwWin.visual);
_glfwWin.visual = NULL;
}
if (_glfwWin.window)
{
XUnmapWindow(_glfwLibrary.display, _glfwWin.window);
XDestroyWindow(_glfwLibrary.display, _glfwWin.window);
_glfwWin.window = (Window) 0;
}
if (_glfwWin.colormap)
{
XFreeColormap(_glfwLibrary.display, _glfwWin.colormap);
_glfwWin.colormap = (Colormap) 0;
}
if (_glfwWin.cursor)
{
XFreeCursor(_glfwLibrary.display, _glfwWin.cursor);
_glfwWin.cursor = (Cursor) 0;
}
}
//========================================================================
// Set the window title
//========================================================================
void _glfwPlatformSetWindowTitle(const char* title)
{
// Set window & icon title
XStoreName(_glfwLibrary.display, _glfwWin.window, title);
XSetIconName(_glfwLibrary.display, _glfwWin.window, title);
}
//========================================================================
// Set the window size
//========================================================================
void _glfwPlatformSetWindowSize(int width, int height)
{
int mode = 0, rate, sizeChanged = GL_FALSE;
XSizeHints* sizehints;
rate = _glfwWin.refreshRate;
if (_glfwWin.fullscreen)
{
// Get the closest matching video mode for the specified window size
mode = _glfwGetClosestVideoMode(_glfwWin.screen, &width, &height, &rate);
}
if (_glfwWin.windowNoResize)
{
// 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.display, _glfwWin.window, sizehints);
XFree(sizehints);
}
// Change window size before changing fullscreen mode?
if (_glfwWin.fullscreen && (width > _glfwWin.width))
{
XResizeWindow(_glfwLibrary.display, _glfwWin.window, width, height);
sizeChanged = GL_TRUE;
}
if (_glfwWin.fullscreen)
{
// Change video mode, keeping current refresh rate
_glfwSetVideoModeMODE(_glfwWin.screen, mode, _glfwWin.refreshRate);
}
// Set window size (if not already changed)
if (!sizeChanged)
XResizeWindow(_glfwLibrary.display, _glfwWin.window, width, height);
}
//========================================================================
// Set the window position.
//========================================================================
void _glfwPlatformSetWindowPos(int x, int y)
{
XMoveWindow(_glfwLibrary.display, _glfwWin.window, x, y);
}
//========================================================================
// Window iconification
//========================================================================
void _glfwPlatformIconifyWindow(void)
{
if (_glfwWin.overrideRedirect)
{
// We can't iconify/restore override-redirect windows, as that's
// performed by the window manager
return;
}
XIconifyWindow(_glfwLibrary.display, _glfwWin.window, _glfwWin.screen);
}
//========================================================================
// Window un-iconification
//========================================================================
void _glfwPlatformRestoreWindow(void)
{
if (_glfwWin.overrideRedirect)
{
// We can't iconify/restore override-redirect windows, as that's
// performed by the window manager
return;
}
XMapWindow(_glfwLibrary.display, _glfwWin.window);
}
//========================================================================
// Swap OpenGL buffers and poll any new events
//========================================================================
void _glfwPlatformSwapBuffers(void)
{
// Update display-buffer
glXSwapBuffers(_glfwLibrary.display, _glfwWin.window);
}
//========================================================================
// Set double buffering swap interval
//========================================================================
void _glfwPlatformSwapInterval(int interval)
{
if (_glfwWin.has_GLX_SGI_swap_control)
_glfwWin.SwapIntervalSGI(interval);
}
//========================================================================
// Read back framebuffer parameters from the context
//========================================================================
void _glfwPlatformRefreshWindowParams(void)
{
int dummy;
GLXFBConfig* fbconfig;
#if defined(_GLFW_HAS_XRANDR)
XRRScreenConfiguration* sc;
#elif defined(_GLFW_HAS_XF86VIDMODE)
XF86VidModeModeLine modeline;
int dotclock;
float pixels_per_second, pixels_per_frame;
#endif
int attribs[] = { GLX_FBCONFIG_ID, _glfwWin.fbconfigID, None };
if (_glfwWin.has_GLX_SGIX_fbconfig)
{
fbconfig = _glfwWin.ChooseFBConfigSGIX(_glfwLibrary.display,
_glfwWin.screen,
attribs,
&dummy);
}
else
{
fbconfig = glXChooseFBConfig(_glfwLibrary.display,
_glfwWin.screen,
attribs,
&dummy);
}
if (fbconfig == NULL)
{
// This should never ever happen
// TODO: Figure out what to do when this happens
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
_glfwWin.accelerated = GL_TRUE;
_glfwWin.redBits = getFBConfigAttrib(*fbconfig, GLX_RED_SIZE);
_glfwWin.greenBits = getFBConfigAttrib(*fbconfig, GLX_GREEN_SIZE);
_glfwWin.blueBits = getFBConfigAttrib(*fbconfig, GLX_BLUE_SIZE);
_glfwWin.alphaBits = getFBConfigAttrib(*fbconfig, GLX_ALPHA_SIZE);
_glfwWin.depthBits = getFBConfigAttrib(*fbconfig, GLX_DEPTH_SIZE);
_glfwWin.stencilBits = getFBConfigAttrib(*fbconfig, GLX_STENCIL_SIZE);
_glfwWin.accumRedBits = getFBConfigAttrib(*fbconfig, GLX_ACCUM_RED_SIZE);
_glfwWin.accumGreenBits = getFBConfigAttrib(*fbconfig, GLX_ACCUM_GREEN_SIZE);
_glfwWin.accumBlueBits = getFBConfigAttrib(*fbconfig, GLX_ACCUM_BLUE_SIZE);
_glfwWin.accumAlphaBits = getFBConfigAttrib(*fbconfig, GLX_ACCUM_ALPHA_SIZE);
_glfwWin.auxBuffers = getFBConfigAttrib(*fbconfig, GLX_AUX_BUFFERS);
_glfwWin.stereo = getFBConfigAttrib(*fbconfig, GLX_STEREO) ? 1 : 0;
// Get FSAA buffer sample count
if (_glfwWin.has_GLX_ARB_multisample)
_glfwWin.samples = getFBConfigAttrib(*fbconfig, GLX_SAMPLES);
else
_glfwWin.samples = 0;
// Default to refresh rate unknown (=0 according to GLFW spec)
_glfwWin.refreshRate = 0;
// Retrieve refresh rate if possible
#if defined(_GLFW_HAS_XRANDR)
if (_glfwLibrary.XRandR.available)
{
sc = XRRGetScreenInfo(_glfwLibrary.display, _glfwWin.root);
_glfwWin.refreshRate = XRRConfigCurrentRate(sc);
XRRFreeScreenConfigInfo(sc);
}
#elif defined(_GLFW_HAS_XF86VIDMODE)
if (_glfwLibrary.XF86VidMode.available)
{
// Use the XF86VidMode extension to get current video mode
XF86VidModeGetModeLine(_glfwLibrary.display, _glfwWin.screen,
&dotclock, &modeline);
pixels_per_second = 1000.0f * (float) dotclock;
pixels_per_frame = (float) modeline.htotal * modeline.vtotal;
_glfwWin.refreshRate = (int)(pixels_per_second/pixels_per_frame+0.5);
}
#endif
XFree(fbconfig);
}
//========================================================================
// Poll for new window and input events
//========================================================================
void _glfwPlatformPollEvents(void)
{
GLboolean closeRequested = GL_FALSE;
// Flag that the cursor has not moved
_glfwInput.MouseMoved = GL_FALSE;
// Process all pending events
while (XPending(_glfwLibrary.display))
{
if (processSingleEvent())
closeRequested = GL_TRUE;
}
// Did we get mouse movement in fully enabled hidden cursor mode?
if (_glfwInput.MouseMoved && _glfwWin.pointerHidden)
{
_glfwPlatformSetMouseCursorPos(_glfwWin.width / 2,
_glfwWin.height / 2);
}
if (closeRequested && _glfwWin.windowCloseCallback)
closeRequested = _glfwWin.windowCloseCallback();
if (closeRequested)
glfwCloseWindow();
}
//========================================================================
// Wait for new window and input events
//========================================================================
void _glfwPlatformWaitEvents(void)
{
XEvent event;
// Block waiting for an event to arrive
XNextEvent(_glfwLibrary.display, &event);
XPutBackEvent(_glfwLibrary.display, &event);
_glfwPlatformPollEvents();
}
//========================================================================
// Hide mouse cursor (lock it)
//========================================================================
void _glfwPlatformHideMouseCursor(void)
{
// Hide cursor
if (!_glfwWin.pointerHidden)
{
XDefineCursor(_glfwLibrary.display, _glfwWin.window, _glfwWin.cursor);
_glfwWin.pointerHidden = GL_TRUE;
}
// Grab cursor to user window
if (!_glfwWin.pointerGrabbed)
{
if (XGrabPointer(_glfwLibrary.display, _glfwWin.window, True,
ButtonPressMask | ButtonReleaseMask |
PointerMotionMask, GrabModeAsync, GrabModeAsync,
_glfwWin.window, None, CurrentTime) ==
GrabSuccess)
{
_glfwWin.pointerGrabbed = GL_TRUE;
}
}
}
//========================================================================
// Show mouse cursor (unlock it)
//========================================================================
void _glfwPlatformShowMouseCursor(void)
{
// 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 (_glfwWin.pointerGrabbed)
{
XUngrabPointer(_glfwLibrary.display, CurrentTime);
_glfwWin.pointerGrabbed = GL_FALSE;
}
// Show cursor
if (_glfwWin.pointerHidden)
{
XUndefineCursor(_glfwLibrary.display, _glfwWin.window);
_glfwWin.pointerHidden = GL_FALSE;
}
}
//========================================================================
// Set physical mouse cursor position
//========================================================================
void _glfwPlatformSetMouseCursorPos(int x, int y)
{
// Store the new position so we can recognise it later
_glfwInput.CursorPosX = x;
_glfwInput.CursorPosY = y;
XWarpPointer(_glfwLibrary.display, None, _glfwWin.window, 0,0,0,0, x, y);
}
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