GLFW-0.2: glfw/lib/x11/x11_window.c
//========================================================================
// GLFW - An OpenGL framework
// File: x11_window.c
// Platform: X11 (Unix)
// API version: 2.6
// WWW: http://glfw.sourceforge.net
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Camilla Berglund
//
// 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"
/* Defines some GLX FSAA tokens if not yet defined */
#ifndef GLX_SAMPLE_BUFFERS
# define GLX_SAMPLE_BUFFERS 100000
#endif
#ifndef GLX_SAMPLES
# define GLX_SAMPLES 100001
#endif
/* KDE decoration values */
enum {
KDE_noDecoration = 0,
KDE_normalDecoration = 1,
KDE_tinyDecoration = 2,
KDE_noFocus = 256,
KDE_standaloneMenuBar = 512,
KDE_desktopIcon = 1024 ,
KDE_staysOnTop = 2048
};
//************************************************************************
//**** GLFW internal functions ****
//************************************************************************
//========================================================================
// _glfwWaitForMapNotify()
//========================================================================
Bool _glfwWaitForMapNotify( Display *d, XEvent *e, char *arg )
{
return (e->type == MapNotify) && (e->xmap.window == (Window)arg);
}
//========================================================================
// _glfwWaitForUnmapNotify()
//========================================================================
Bool _glfwWaitForUnmapNotify( Display *d, XEvent *e, char *arg )
{
return (e->type == UnmapNotify) && (e->xmap.window == (Window)arg);
}
//========================================================================
// _glfwDisableDecorations() - Turn off window decorations
// Based on xawdecode: src/wmhooks.c
//========================================================================
#define MWM_HINTS_DECORATIONS (1L << 1)
static void _glfwDisableDecorations( void )
{
int RemovedDecorations;
Atom HintAtom;
XSetWindowAttributes attributes;
RemovedDecorations = 0;
// First try to set MWM hints
HintAtom = XInternAtom( _glfwLibrary.Dpy, "_MOTIF_WM_HINTS", True );
if ( HintAtom != None )
{
struct {
unsigned long flags;
unsigned long functions;
unsigned long decorations;
long input_mode;
unsigned long status;
} MWMHints = { MWM_HINTS_DECORATIONS, 0, 0, 0, 0 };
XChangeProperty( _glfwLibrary.Dpy, _glfwWin.Win, HintAtom, HintAtom,
32, PropModeReplace, (unsigned char *)&MWMHints,
sizeof(MWMHints)/4 );
RemovedDecorations = 1;
}
// Now try to set KWM hints
HintAtom = XInternAtom( _glfwLibrary.Dpy, "KWM_WIN_DECORATION", True );
if ( HintAtom != None )
{
long KWMHints = KDE_tinyDecoration;
XChangeProperty( _glfwLibrary.Dpy, _glfwWin.Win, HintAtom, HintAtom,
32, PropModeReplace, (unsigned char *)&KWMHints,
sizeof(KWMHints)/4 );
RemovedDecorations = 1;
}
// Now try to set GNOME hints
HintAtom = XInternAtom(_glfwLibrary.Dpy, "_WIN_HINTS", True );
if ( HintAtom != None )
{
long GNOMEHints = 0;
XChangeProperty( _glfwLibrary.Dpy, _glfwWin.Win, HintAtom, HintAtom,
32, PropModeReplace, (unsigned char *)&GNOMEHints,
sizeof(GNOMEHints)/4 );
RemovedDecorations = 1;
}
// Now try to set KDE NET_WM hints
HintAtom = XInternAtom( _glfwLibrary.Dpy, "_NET_WM_WINDOW_TYPE", True );
if ( HintAtom != None )
{
Atom NET_WMHints[2];
NET_WMHints[0] = XInternAtom( _glfwLibrary.Dpy, "_KDE_NET_WM_WINDOW_TYPE_OVERRIDE", True );
/* define a fallback... */
NET_WMHints[1] = XInternAtom( _glfwLibrary.Dpy, "_NET_WM_WINDOW_TYPE_NORMAL", True );
XChangeProperty( _glfwLibrary.Dpy, _glfwWin.Win, HintAtom, XA_ATOM,
32, PropModeReplace, (unsigned char *)&NET_WMHints,
2 );
RemovedDecorations = 1;
}
// Set ICCCM fullscreen WM hint
HintAtom = XInternAtom( _glfwLibrary.Dpy, "_NET_WM_STATE", True );
if ( HintAtom != None )
{
Atom NET_WMHints[1];
NET_WMHints[0] = XInternAtom( _glfwLibrary.Dpy, "_NET_WM_STATE_FULLSCREEN", True );
XChangeProperty( _glfwLibrary.Dpy, _glfwWin.Win, HintAtom, XA_ATOM,
32, PropModeReplace, (unsigned char *)&NET_WMHints, 1 );
}
// Did we sucessfully remove the window decorations?
if( RemovedDecorations )
{
// Finally set the transient hints
XSetTransientForHint( _glfwLibrary.Dpy, _glfwWin.Win, RootWindow(_glfwLibrary.Dpy, _glfwWin.Scrn) );
XUnmapWindow( _glfwLibrary.Dpy, _glfwWin.Win );
XMapWindow( _glfwLibrary.Dpy, _glfwWin.Win );
}
else
{
// The Butcher way of removing window decorations
attributes.override_redirect = True;
XChangeWindowAttributes( _glfwLibrary.Dpy, _glfwWin.Win,
CWOverrideRedirect, &attributes );
_glfwWin.OverrideRedirect = GL_TRUE;
}
}
//========================================================================
// _glfwEnableDecorations() - Turn on window decorations
//========================================================================
static void _glfwEnableDecorations( void )
{
int ActivatedDecorations;
Atom HintAtom;
// If this is an override redirect window, skip it...
if( _glfwWin.OverrideRedirect )
{
return;
}
ActivatedDecorations = 0;
// First try to unset MWM hints
HintAtom = XInternAtom( _glfwLibrary.Dpy, "_MOTIF_WM_HINTS", True );
if ( HintAtom != None )
{
XDeleteProperty( _glfwLibrary.Dpy, _glfwWin.Win, HintAtom );
ActivatedDecorations = 1;
}
// Now try to unset KWM hints
HintAtom = XInternAtom( _glfwLibrary.Dpy, "KWM_WIN_DECORATION", True );
if ( HintAtom != None )
{
XDeleteProperty( _glfwLibrary.Dpy, _glfwWin.Win, HintAtom );
ActivatedDecorations = 1;
}
// Now try to unset GNOME hints
HintAtom = XInternAtom( _glfwLibrary.Dpy, "_WIN_HINTS", True );
if ( HintAtom != None )
{
XDeleteProperty( _glfwLibrary.Dpy, _glfwWin.Win, HintAtom );
ActivatedDecorations = 1;
}
// Now try to unset NET_WM hints
HintAtom = XInternAtom( _glfwLibrary.Dpy, "_NET_WM_WINDOW_TYPE", True );
if ( HintAtom != None )
{
Atom NET_WMHints = XInternAtom( _glfwLibrary.Dpy, "_NET_WM_WINDOW_TYPE_NORMAL", True);
if( NET_WMHints != None )
{
XChangeProperty( _glfwLibrary.Dpy, _glfwWin.Win,
HintAtom, XA_ATOM, 32, PropModeReplace,
(unsigned char *)&NET_WMHints, 1 );
ActivatedDecorations = 1;
}
}
// Finally unset the transient hints if necessary
if( ActivatedDecorations )
{
// NOTE: Does this work?
XSetTransientForHint( _glfwLibrary.Dpy, _glfwWin.Win, None);
XUnmapWindow( _glfwLibrary.Dpy, _glfwWin.Win );
XMapWindow( _glfwLibrary.Dpy, _glfwWin.Win );
}
}
//========================================================================
// _glfwChooseVisual() - We do our own function here, since
// glXChooseVisual does not behave as we want it to (not according to the
// GLFW specs)
//========================================================================
XVisualInfo * _glfwChooseVisual( Display *Dpy, int Screen, int r, int g,
int b, int a, int d, int s, int ar, int ag, int ab, int aa, int aux,
int fsaa, int stereo)
{
XVisualInfo *VI, *VI_list, VI_tmp;
int nitems_return, i;
int vi_gl, vi_rgba, vi_double, vi_stereo;
int vi_r, vi_g, vi_b, vi_a, vi_d, vi_s, vi_ar, vi_ag, vi_ab, vi_aa;
int vi_aux;
int color, accum, vi_accum;
int missing, color_diff, extra_diff;
int best_vis, best_missing, best_color_diff, best_extra_diff;
int samples, samplebuffers, vi_samples, vi_samplebuffers;
// Get list of visuals for this screen & display
VI_tmp.screen = Screen;
VI_list = XGetVisualInfo( Dpy, VisualScreenMask, &VI_tmp,
&nitems_return );
if( VI_list == NULL )
{
return NULL;
}
// Pick some prefered color depth if the user did not request a
// specific depth (note: if the user did not request a specific color
// depth, this will not be a driving demand, it's only here to avoid
// selection randomness)
color = (r > 0 || g > 0 || b > 0);
if( !color )
{
r = g = b = 8;
}
// Make sure that stereo is 1 or 0
stereo = stereo ? 1 : 0;
// Convenience pre-calculation
accum = (ar > 0 || ag > 0 || ab > 0 || aa > 0);
samples = fsaa;
samplebuffers = (fsaa > 0) ? 1 : 0;
// Loop through list of visuals to find best match
best_vis = -1;
best_missing = 0x7fffffff;
best_color_diff = 0x7fffffff;
best_extra_diff = 0x7fffffff;
for( i = 0; i < nitems_return; i ++ )
{
// We want GL, RGBA & DOUBLEBUFFER, and NOT STEREO / STEREO
glXGetConfig( Dpy, &VI_list[i], GLX_USE_GL, &vi_gl );
glXGetConfig( Dpy, &VI_list[i], GLX_RGBA, &vi_rgba );
glXGetConfig( Dpy, &VI_list[i], GLX_DOUBLEBUFFER, &vi_double );
glXGetConfig( Dpy, &VI_list[i], GLX_STEREO, &vi_stereo );
vi_stereo = vi_stereo ? 1 : 0;
if( vi_gl && vi_rgba && vi_double && (vi_stereo == stereo) )
{
// Get visual color parameters
glXGetConfig( Dpy, &VI_list[i], GLX_RED_SIZE, &vi_r );
glXGetConfig( Dpy, &VI_list[i], GLX_GREEN_SIZE, &vi_g );
glXGetConfig( Dpy, &VI_list[i], GLX_BLUE_SIZE, &vi_b );
// Get visual "extra" parameters
glXGetConfig( Dpy, &VI_list[i], GLX_ALPHA_SIZE, &vi_a );
glXGetConfig( Dpy, &VI_list[i], GLX_DEPTH_SIZE, &vi_d );
glXGetConfig( Dpy, &VI_list[i], GLX_STENCIL_SIZE, &vi_s );
glXGetConfig( Dpy, &VI_list[i], GLX_ACCUM_RED_SIZE, &vi_ar );
glXGetConfig( Dpy, &VI_list[i], GLX_ACCUM_GREEN_SIZE, &vi_ag );
glXGetConfig( Dpy, &VI_list[i], GLX_ACCUM_BLUE_SIZE, &vi_ab );
glXGetConfig( Dpy, &VI_list[i], GLX_ACCUM_ALPHA_SIZE, &vi_aa );
glXGetConfig( Dpy, &VI_list[i], GLX_AUX_BUFFERS, &vi_aux );
glXGetConfig( Dpy, &VI_list[i], GLX_SAMPLE_BUFFERS, &vi_samplebuffers );
glXGetConfig( Dpy, &VI_list[i], GLX_SAMPLES, &vi_samples );
vi_accum = (vi_ar > 0 || vi_ag > 0 || vi_ab > 0 || vi_aa > 0);
// Check how many buffers are missing
missing = 0;
if( a > 0 && vi_a == 0 ) missing ++;
if( d > 0 && vi_d == 0 ) missing ++;
if( s > 0 && vi_s == 0 ) missing ++;
if( accum && !vi_accum ) missing ++;
if( aux > 0 && vi_aux == 0 ) missing ++;
if( samplebuffers > 0 && vi_samplebuffers == 0 ) missing ++;
// Calculate color diff
color_diff = (r - vi_r) * (r - vi_r) +
(g - vi_g) * (g - vi_g) +
(b - vi_b) * (b - vi_b);
// Calculate "extra" diff
extra_diff = 0;
if( a > 0 )
{
extra_diff += (a - vi_a) * (a - vi_a);
}
if( d > 0 )
{
extra_diff += (d - vi_d) * (d - vi_d);
}
if( s > 0 )
{
extra_diff += (s - vi_s) * (s - vi_s);
}
if( accum )
{
extra_diff += (ar - vi_ar) * (ar - vi_ar) +
(ag - vi_ag) * (ag - vi_ag) +
(ab - vi_ab) * (ab - vi_ab) +
(aa - vi_aa) * (aa - vi_aa);
}
if( aux > 0 )
{
extra_diff += (aux - vi_aux) * (aux - vi_aux);
}
if( samples > 0 )
{
extra_diff += (samples - vi_samples) * (samples - vi_samples);
}
// Check if this is a better match. We implement some
// complicated rules, by prioritizing in this order:
// 1) Visuals with the least number of missing buffers always
// have priority
// 2a) If (r,g,b)!=(0,0,0), color depth has priority over
// other buffers
// 2b) If (r,g,b)==(0,0,0), other buffers have priority over
// color depth
if( missing < best_missing )
{
best_vis = i;
}
else if( missing == best_missing )
{
if( color )
{
if( (color_diff < best_color_diff) ||
(color_diff == best_color_diff &&
extra_diff < best_extra_diff) )
{
best_vis = i;
}
}
else
{
if( (extra_diff < best_extra_diff) ||
(extra_diff == best_extra_diff &&
color_diff < best_color_diff) )
{
best_vis = i;
}
}
}
if( best_vis == i )
{
best_missing = missing;
best_color_diff = color_diff;
best_extra_diff = extra_diff;
}
}
}
// Copy best visual to a visual to return
if( best_vis >= 0 )
{
VI = XGetVisualInfo( Dpy, VisualIDMask, &VI_list[ best_vis ],
&nitems_return );
}
else
{
VI = NULL;
}
// Free visuals list
XFree( VI_list );
return VI;
}
//========================================================================
// _glfwTranslateKey() - Translates an X Window key to internal coding
//========================================================================
static int _glfwTranslateKey( 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.Dpy, 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.Dpy, 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_Alt_R: return GLFW_KEY_RALT;
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;
}
}
//========================================================================
// _glfwTranslateChar() - Translates an X Window event to Unicode
//========================================================================
static int _glfwTranslateChar( XKeyEvent *event )
{
KeySym keysym;
// Get X11 keysym
XLookupString( event, NULL, 0, &keysym, NULL );
// Convert to Unicode (see x11_keysym2unicode.c)
return (int) _glfwKeySym2Unicode( keysym );
}
//========================================================================
// Get next X event (called by glfwPollEvents)
//========================================================================
static int _glfwGetNextEvent( void )
{
XEvent event, next_event;
// Pull next event from event queue
XNextEvent( _glfwLibrary.Dpy, &event );
// Handle certain window messages
switch( event.type )
{
// Is a key being pressed?
case KeyPress:
{
// Translate and report key press
_glfwInputKey( _glfwTranslateKey( event.xkey.keycode ), GLFW_PRESS );
// Translate and report character input
if( _glfwWin.CharCallback )
{
_glfwInputChar( _glfwTranslateChar( &event.xkey ), GLFW_PRESS );
}
break;
}
// Is a key being released?
case KeyRelease:
{
// Do not report key releases for key repeats. For key repeats
// we will get KeyRelease/KeyPress pairs with identical time
// stamps. User selected key repeat filtering is handled in
// _glfwInputKey()/_glfwInputChar().
if( XEventsQueued( _glfwLibrary.Dpy, QueuedAfterReading ) )
{
XPeekEvent( _glfwLibrary.Dpy, &next_event );
if( next_event.type == KeyPress &&
next_event.xkey.window == event.xkey.window &&
next_event.xkey.keycode == event.xkey.keycode &&
next_event.xkey.time == event.xkey.time )
{
// Do not report anything for this event
break;
}
}
// Translate and report key release
_glfwInputKey( _glfwTranslateKey( event.xkey.keycode ), GLFW_RELEASE );
// Translate and report character input
if( _glfwWin.CharCallback )
{
_glfwInputChar( _glfwTranslateChar( &event.xkey ), GLFW_RELEASE );
}
break;
}
// Were any of the mouse-buttons pressed?
case ButtonPress:
{
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;
}
// Were any of the mouse-buttons released?
case ButtonRelease:
{
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;
}
// Was the mouse moved?
case MotionNotify:
{
if( event.xmotion.x != _glfwInput.CursorPosX ||
event.xmotion.y != _glfwInput.CursorPosY )
{
if( _glfwWin.MouseLock )
{
_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;
// Call user callback function
if( _glfwWin.MousePosCallback )
{
_glfwWin.MousePosCallback( _glfwInput.MousePosX,
_glfwInput.MousePosY );
}
}
break;
}
// Was the window resized?
case ConfigureNotify:
{
if( event.xconfigure.width != _glfwWin.Width ||
event.xconfigure.height != _glfwWin.Height )
{
_glfwWin.Width = event.xconfigure.width;
_glfwWin.Height = event.xconfigure.height;
if( _glfwWin.WindowSizeCallback )
{
_glfwWin.WindowSizeCallback( _glfwWin.Width,
_glfwWin.Height );
}
}
break;
}
// Was the window closed by the window manager?
case ClientMessage:
{
if( (Atom) event.xclient.data.l[ 0 ] == _glfwWin.WMDeleteWindow )
{
return GL_TRUE;
}
if( (Atom) event.xclient.data.l[ 0 ] == _glfwWin.WMPing )
{
XSendEvent( _glfwLibrary.Dpy,
RootWindow( _glfwLibrary.Dpy, _glfwWin.VI->screen ),
False, SubstructureNotifyMask | SubstructureRedirectMask, &event );
}
break;
}
// Was the window mapped (un-iconified)?
case MapNotify:
_glfwWin.MapNotifyCount++;
break;
// Was the window unmapped (iconified)?
case UnmapNotify:
_glfwWin.MapNotifyCount--;
break;
// Was the window activated?
case FocusIn:
_glfwWin.FocusInCount++;
break;
// Was the window de-activated?
case FocusOut:
_glfwWin.FocusInCount--;
break;
// Was the window contents damaged?
case Expose:
{
// Call user callback function
if( _glfwWin.WindowRefreshCallback )
{
_glfwWin.WindowRefreshCallback();
}
break;
}
// Was the window destroyed?
case DestroyNotify:
return GL_TRUE;
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;
}
//========================================================================
// _glfwCreateNULLCursor() - Create a blank cursor (for locked mouse mode)
//========================================================================
Cursor _glfwCreateNULLCursor( 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;
}
//========================================================================
// _glfwInitGLXExtensions() - Initialize GLX-specific extensions
//========================================================================
static void _glfwInitGLXExtensions( void )
{
int has_swap_control;
// Initialize OpenGL extension: GLX_SGI_swap_control
has_swap_control = _glfwPlatformExtensionSupported(
"GLX_SGI_swap_control"
);
if( has_swap_control )
{
_glfwWin.SwapInterval = (GLXSWAPINTERVALSGI_T)
_glfw_glXGetProcAddress( (GLubyte*) "glXSwapIntervalSGI" );
}
else
{
_glfwWin.SwapInterval = NULL;
}
}
//************************************************************************
//**** Platform implementation functions ****
//************************************************************************
//========================================================================
// _glfwPlatformOpenWindow() - Here is where the window is created, and
// the OpenGL rendering context is created
//========================================================================
int _glfwPlatformOpenWindow( int width, int height, int redbits,
int greenbits, int bluebits, int alphabits, int depthbits,
int stencilbits, int mode, _GLFWhints* hints )
{
Colormap cmap;
XSetWindowAttributes wa;
XEvent event;
Atom protocols[2];
// Clear platform specific GLFW window state
_glfwWin.VI = NULL;
_glfwWin.CX = (GLXContext)0;
_glfwWin.Win = (Window)0;
_glfwWin.Hints = NULL;
_glfwWin.PointerGrabbed = GL_FALSE;
_glfwWin.KeyboardGrabbed = GL_FALSE;
_glfwWin.OverrideRedirect = GL_FALSE;
_glfwWin.FS.ModeChanged = GL_FALSE;
_glfwWin.Saver.Changed = GL_FALSE;
_glfwWin.RefreshRate = hints->RefreshRate;
// Fullscreen & screen saver settings
// Check if GLX is supported on this display
if( !glXQueryExtension( _glfwLibrary.Dpy, NULL, NULL ) )
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
// Get screen ID for this window
_glfwWin.Scrn = _glfwLibrary.DefaultScreen;
// Get an appropriate visual
_glfwWin.VI = _glfwChooseVisual( _glfwLibrary.Dpy,
_glfwWin.Scrn,
redbits, greenbits, bluebits,
alphabits, depthbits, stencilbits,
hints->AccumRedBits, hints->AccumGreenBits,
hints->AccumBlueBits, hints->AccumAlphaBits,
hints->AuxBuffers, hints->Samples, hints->Stereo );
if( _glfwWin.VI == NULL )
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
// Create a GLX context
_glfwWin.CX = glXCreateContext( _glfwLibrary.Dpy, _glfwWin.VI, 0, GL_TRUE );
if( _glfwWin.CX == NULL )
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
// Create a colormap
cmap = XCreateColormap( _glfwLibrary.Dpy, RootWindow( _glfwLibrary.Dpy,
_glfwWin.VI->screen), _glfwWin.VI->visual, AllocNone );
// Do we want fullscreen?
if( mode == GLFW_FULLSCREEN )
{
// Change video mode
_glfwSetVideoMode( _glfwWin.Scrn, &_glfwWin.Width,
&_glfwWin.Height, &_glfwWin.RefreshRate );
// Remember old screen saver settings
XGetScreenSaver( _glfwLibrary.Dpy, &_glfwWin.Saver.Timeout,
&_glfwWin.Saver.Interval, &_glfwWin.Saver.Blanking,
&_glfwWin.Saver.Exposure );
// Disable screen saver
XSetScreenSaver( _glfwLibrary.Dpy, 0, 0, DontPreferBlanking,
DefaultExposures );
}
// Attributes for window
wa.colormap = cmap;
wa.border_pixel = 0;
wa.event_mask = StructureNotifyMask | KeyPressMask | KeyReleaseMask |
PointerMotionMask | ButtonPressMask | ButtonReleaseMask |
ExposureMask | FocusChangeMask | VisibilityChangeMask;
// Create a window
_glfwWin.Win = XCreateWindow(
_glfwLibrary.Dpy,
RootWindow( _glfwLibrary.Dpy, _glfwWin.VI->screen ),
0, 0, // Upper left corner
_glfwWin.Width, _glfwWin.Height, // Width, height
0, // Borderwidth
_glfwWin.VI->depth, // Depth
InputOutput,
_glfwWin.VI->visual,
CWBorderPixel | CWColormap | CWEventMask,
&wa
);
if( !_glfwWin.Win )
{
_glfwPlatformCloseWindow();
return GL_FALSE;
}
// Get the delete window WM protocol atom
_glfwWin.WMDeleteWindow = XInternAtom( _glfwLibrary.Dpy,
"WM_DELETE_WINDOW",
False );
// Get the ping WM protocol atom
_glfwWin.WMPing = XInternAtom( _glfwLibrary.Dpy, "_NET_WM_PING", False );
protocols[0] = _glfwWin.WMDeleteWindow;
protocols[1] = _glfwWin.WMPing;
// Allow us to trap the Window Close protocol
XSetWMProtocols( _glfwLibrary.Dpy, _glfwWin.Win, protocols,
sizeof(protocols) / sizeof(Atom) );
// Remove window decorations for fullscreen windows
if( mode == GLFW_FULLSCREEN )
{
_glfwDisableDecorations();
}
_glfwWin.Hints = XAllocSizeHints();
if( hints->WindowNoResize )
{
_glfwWin.Hints->flags |= (PMinSize | PMaxSize);
_glfwWin.Hints->min_width = _glfwWin.Hints->max_width = _glfwWin.Width;
_glfwWin.Hints->min_height = _glfwWin.Hints->max_height = _glfwWin.Height;
}
if( mode == GLFW_FULLSCREEN )
{
_glfwWin.Hints->flags |= PPosition;
_glfwWin.Hints->x = 0;
_glfwWin.Hints->y = 0;
}
XSetWMNormalHints( _glfwLibrary.Dpy, _glfwWin.Win, _glfwWin.Hints );
// Map window
XMapWindow( _glfwLibrary.Dpy, _glfwWin.Win );
// Wait for map notification
XIfEvent( _glfwLibrary.Dpy, &event, _glfwWaitForMapNotify,
(char*)_glfwWin.Win );
// Make sure that our window ends up on top of things
XRaiseWindow( _glfwLibrary.Dpy, _glfwWin.Win );
// Fullscreen mode "post processing"
if( mode == GLFW_FULLSCREEN )
{
#if defined( _GLFW_HAS_XRANDR )
// Request screen change notifications
if( _glfwLibrary.XRandR.Available )
{
XRRSelectInput( _glfwLibrary.Dpy,
_glfwWin.Win,
RRScreenChangeNotifyMask );
}
#endif
// Force window position/size (some WMs do their own window
// geometry, which we want to override)
XMoveWindow( _glfwLibrary.Dpy, _glfwWin.Win, 0, 0 );
XResizeWindow( _glfwLibrary.Dpy, _glfwWin.Win, _glfwWin.Width,
_glfwWin.Height );
// Grab keyboard
if( XGrabKeyboard( _glfwLibrary.Dpy, _glfwWin.Win, True,
GrabModeAsync, GrabModeAsync, CurrentTime ) ==
GrabSuccess )
{
_glfwWin.KeyboardGrabbed = GL_TRUE;
}
// Grab mouse cursor
if( XGrabPointer( _glfwLibrary.Dpy, _glfwWin.Win, True,
ButtonPressMask | ButtonReleaseMask |
PointerMotionMask, GrabModeAsync, GrabModeAsync,
_glfwWin.Win, None, CurrentTime ) ==
GrabSuccess )
{
_glfwWin.PointerGrabbed = GL_TRUE;
}
// 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 works for XFree86
XWarpPointer( _glfwLibrary.Dpy, None, _glfwWin.Win, 0,0,0,0, 0,0 );
XWarpPointer( _glfwLibrary.Dpy, None, _glfwWin.Win, 0,0,0,0,
_glfwWin.Width/2, _glfwWin.Height/2 );
}
// Set window & icon name
_glfwPlatformSetWindowTitle( "GLFW Window" );
// Connect the context to the window
glXMakeCurrent( _glfwLibrary.Dpy, _glfwWin.Win, _glfwWin.CX );
// Start by clearing the front buffer to black (avoid ugly desktop
// remains in our OpenGL window)
glClear( GL_COLOR_BUFFER_BIT );
glXSwapBuffers( _glfwLibrary.Dpy, _glfwWin.Win );
// Initialize GLX-specific OpenGL extensions
_glfwInitGLXExtensions();
return GL_TRUE;
}
//========================================================================
// Properly kill the window/video display
//========================================================================
void _glfwPlatformCloseWindow( void )
{
#if defined( _GLFW_HAS_XRANDR )
XRRScreenConfiguration *sc;
Window root;
#endif
// Free WM size hints
if( _glfwWin.Hints )
{
XFree( _glfwWin.Hints );
_glfwWin.Hints = NULL;
}
// Do we have a rendering context?
if( _glfwWin.CX )
{
// Release the context
glXMakeCurrent( _glfwLibrary.Dpy, None, NULL );
// Delete the context
glXDestroyContext( _glfwLibrary.Dpy, _glfwWin.CX );
_glfwWin.CX = NULL;
}
// Ungrab pointer and/or keyboard?
if( _glfwWin.KeyboardGrabbed )
{
XUngrabKeyboard( _glfwLibrary.Dpy, CurrentTime );
_glfwWin.KeyboardGrabbed = GL_FALSE;
}
if( _glfwWin.PointerGrabbed )
{
XUngrabPointer( _glfwLibrary.Dpy, CurrentTime );
_glfwWin.PointerGrabbed = GL_FALSE;
}
// Do we have a window?
if( _glfwWin.Win )
{
// Unmap the window
XUnmapWindow( _glfwLibrary.Dpy, _glfwWin.Win );
// Destroy the window
XDestroyWindow( _glfwLibrary.Dpy, _glfwWin.Win );
_glfwWin.Win = (Window) 0;
}
// Did we change the fullscreen resolution?
if( _glfwWin.FS.ModeChanged )
{
#if defined( _GLFW_HAS_XRANDR )
if( _glfwLibrary.XRandR.Available )
{
root = RootWindow( _glfwLibrary.Dpy, _glfwWin.Scrn );
sc = XRRGetScreenInfo( _glfwLibrary.Dpy, root );
XRRSetScreenConfig( _glfwLibrary.Dpy,
sc,
root,
_glfwWin.FS.OldSizeID,
_glfwWin.FS.OldRotation,
CurrentTime );
XRRFreeScreenConfigInfo( sc );
}
#elif defined( _GLFW_HAS_XF86VIDMODE )
if( _glfwLibrary.XF86VidMode.Available )
{
// Unlock mode switch
XF86VidModeLockModeSwitch( _glfwLibrary.Dpy,
_glfwWin.Scrn,
0 );
// Change the video mode back to the old mode
XF86VidModeSwitchToMode( _glfwLibrary.Dpy,
_glfwWin.Scrn, &_glfwWin.FS.OldMode );
}
#endif
_glfwWin.FS.ModeChanged = GL_FALSE;
}
// Did we change the screen saver setting?
if( _glfwWin.Saver.Changed )
{
// Restore old screen saver settings
XSetScreenSaver( _glfwLibrary.Dpy, _glfwWin.Saver.Timeout,
_glfwWin.Saver.Interval, _glfwWin.Saver.Blanking,
_glfwWin.Saver.Exposure );
_glfwWin.Saver.Changed = GL_FALSE;
}
XSync( _glfwLibrary.Dpy, True );
}
//========================================================================
// _glfwPlatformSetWindowTitle() - Set the window title.
//========================================================================
void _glfwPlatformSetWindowTitle( const char *title )
{
// Set window & icon title
XStoreName( _glfwLibrary.Dpy, _glfwWin.Win, title );
XSetIconName( _glfwLibrary.Dpy, _glfwWin.Win, title );
}
//========================================================================
// _glfwPlatformSetWindowSize() - Set the window size.
//========================================================================
void _glfwPlatformSetWindowSize( int width, int height )
{
int mode = 0, rate, sizechanged = GL_FALSE;
GLint drawbuffer;
GLfloat clearcolor[4];
rate = _glfwWin.RefreshRate;
// If we are in fullscreen mode, get some info about the current mode
if( _glfwWin.Fullscreen )
{
// Get closest match for target video mode
mode = _glfwGetClosestVideoMode( _glfwWin.Scrn, &width, &height, &rate );
}
if( _glfwWin.WindowNoResize )
{
_glfwWin.Hints->min_width = _glfwWin.Hints->max_width = width;
_glfwWin.Hints->min_height = _glfwWin.Hints->max_height = height;
}
XSetWMNormalHints( _glfwLibrary.Dpy, _glfwWin.Win, _glfwWin.Hints );
// Change window size before changing fullscreen mode?
if( _glfwWin.Fullscreen && (width > _glfwWin.Width) )
{
XResizeWindow( _glfwLibrary.Dpy, _glfwWin.Win, width, height );
sizechanged = GL_TRUE;
}
// Change fullscreen video mode?
if( _glfwWin.Fullscreen )
{
// Change video mode (keeping current rate)
_glfwSetVideoModeMODE( _glfwWin.Scrn, mode, _glfwWin.RefreshRate );
// Clear the front buffer to black (avoid ugly desktop remains in
// our OpenGL window)
glGetIntegerv( GL_DRAW_BUFFER, &drawbuffer );
glGetFloatv( GL_COLOR_CLEAR_VALUE, clearcolor );
glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
glClear( GL_COLOR_BUFFER_BIT );
if( drawbuffer == GL_BACK )
{
glXSwapBuffers( _glfwLibrary.Dpy, _glfwWin.Win );
}
glClearColor( clearcolor[0], clearcolor[1], clearcolor[2],
clearcolor[3] );
}
// Set window size (if not already changed)
if( !sizechanged )
{
XResizeWindow( _glfwLibrary.Dpy, _glfwWin.Win, width, height );
}
}
//========================================================================
// _glfwPlatformSetWindowPos() - Set the window position.
//========================================================================
void _glfwPlatformSetWindowPos( int x, int y )
{
// Set window position
XMoveWindow( _glfwLibrary.Dpy, _glfwWin.Win, x, y );
}
//========================================================================
// _glfwPlatformIconfyWindow() - Window iconification
//========================================================================
void _glfwPlatformIconifyWindow( void )
{
// We can't do this for override redirect windows
if( _glfwWin.OverrideRedirect )
{
return;
}
// In fullscreen mode, we need to restore the desktop video mode
if( _glfwWin.Fullscreen )
{
#if defined( _GLFW_HAS_XF86VIDMODE )
if( _glfwLibrary.XF86VidMode.Available )
{
// Unlock mode switch
XF86VidModeLockModeSwitch( _glfwLibrary.Dpy,
_glfwWin.Scrn,
0 );
// Change the video mode back to the old mode
XF86VidModeSwitchToMode( _glfwLibrary.Dpy,
_glfwWin.Scrn, &_glfwWin.FS.OldMode );
}
#endif
_glfwWin.FS.ModeChanged = GL_FALSE;
}
// Show mouse pointer
if( _glfwWin.PointerHidden )
{
XUndefineCursor( _glfwLibrary.Dpy, _glfwWin.Win );
_glfwWin.PointerHidden = GL_FALSE;
}
// Un-grab mouse pointer
if( _glfwWin.PointerGrabbed )
{
XUngrabPointer( _glfwLibrary.Dpy, CurrentTime );
_glfwWin.PointerGrabbed = GL_FALSE;
}
// Iconify window
XIconifyWindow( _glfwLibrary.Dpy, _glfwWin.Win,
_glfwWin.Scrn );
// Window is now iconified
_glfwWin.Iconified = GL_TRUE;
}
//========================================================================
// Window un-iconification
//========================================================================
void _glfwPlatformRestoreWindow( void )
{
// We can't do this for override redirect windows
if( _glfwWin.OverrideRedirect )
{
return;
}
// In fullscreen mode, change back video mode to user selected mode
if( _glfwWin.Fullscreen )
{
_glfwSetVideoMode( _glfwWin.Scrn,
&_glfwWin.Width, &_glfwWin.Height, &_glfwWin.RefreshRate );
}
// Un-iconify window
XMapWindow( _glfwLibrary.Dpy, _glfwWin.Win );
// In fullscreen mode...
if( _glfwWin.Fullscreen )
{
// Make sure window is in upper left corner
XMoveWindow( _glfwLibrary.Dpy, _glfwWin.Win, 0, 0 );
// Get input focus
XSetInputFocus( _glfwLibrary.Dpy, _glfwWin.Win, RevertToParent,
CurrentTime );
}
// Lock mouse, if necessary
if( _glfwWin.MouseLock )
{
// Hide cursor
if( !_glfwWin.PointerHidden )
{
XDefineCursor( _glfwLibrary.Dpy, _glfwWin.Win,
_glfwCreateNULLCursor( _glfwLibrary.Dpy,
_glfwWin.Win ) );
_glfwWin.PointerHidden = GL_TRUE;
}
// Grab cursor
if( !_glfwWin.PointerGrabbed )
{
if( XGrabPointer( _glfwLibrary.Dpy, _glfwWin.Win, True,
ButtonPressMask | ButtonReleaseMask |
PointerMotionMask, GrabModeAsync,
GrabModeAsync, _glfwWin.Win, None,
CurrentTime ) == GrabSuccess )
{
_glfwWin.PointerGrabbed = GL_TRUE;
}
}
}
// Window is no longer iconified
_glfwWin.Iconified = GL_FALSE;
}
//========================================================================
// _glfwPlatformSwapBuffers() - Swap buffers (double-buffering) and poll
// any new events.
//========================================================================
void _glfwPlatformSwapBuffers( void )
{
// Update display-buffer
glXSwapBuffers( _glfwLibrary.Dpy, _glfwWin.Win );
}
//========================================================================
// _glfwPlatformSwapInterval() - Set double buffering swap interval
//========================================================================
void _glfwPlatformSwapInterval( int interval )
{
if( _glfwWin.SwapInterval )
{
_glfwWin.SwapInterval( interval );
}
}
//========================================================================
// _glfwPlatformRefreshWindowParams()
//========================================================================
void _glfwPlatformRefreshWindowParams( void )
{
#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 sample_buffers;
// AFAIK, there is no easy/sure way of knowing if OpenGL is hardware
// accelerated
_glfwWin.Accelerated = GL_TRUE;
// "Standard" window parameters
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_RED_SIZE,
&_glfwWin.RedBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_GREEN_SIZE,
&_glfwWin.GreenBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_BLUE_SIZE,
&_glfwWin.BlueBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_ALPHA_SIZE,
&_glfwWin.AlphaBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_DEPTH_SIZE,
&_glfwWin.DepthBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_STENCIL_SIZE,
&_glfwWin.StencilBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_ACCUM_RED_SIZE,
&_glfwWin.AccumRedBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_ACCUM_GREEN_SIZE,
&_glfwWin.AccumGreenBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_ACCUM_BLUE_SIZE,
&_glfwWin.AccumBlueBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_ACCUM_ALPHA_SIZE,
&_glfwWin.AccumAlphaBits );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_AUX_BUFFERS,
&_glfwWin.AuxBuffers );
// Get stereo rendering setting
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_STEREO,
&_glfwWin.Stereo );
_glfwWin.Stereo = _glfwWin.Stereo ? 1 : 0;
// Get multisample buffer samples
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_SAMPLES,
&_glfwWin.Samples );
glXGetConfig( _glfwLibrary.Dpy, _glfwWin.VI, GLX_SAMPLE_BUFFERS,
&sample_buffers );
if( sample_buffers == 0 )
_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.Dpy,
RootWindow( _glfwLibrary.Dpy, _glfwWin.Scrn ) );
_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.Dpy, _glfwWin.Scrn,
&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
}
//========================================================================
// _glfwPlatformPollEvents() - Poll for new window and input events
//========================================================================
void _glfwPlatformPollEvents( void )
{
int winclosed = GL_FALSE;
// Flag that the cursor has not moved
_glfwInput.MouseMoved = GL_FALSE;
// Clear MapNotify and FocusIn counts
_glfwWin.MapNotifyCount = 0;
_glfwWin.FocusInCount = 0;
// Use XSync to synchronise events to the X display.
// I don't know if this can have a serious performance impact. My
// benchmarks with a GeForce card under Linux shows no difference with
// or without XSync, but when the GL window is rendered over a slow
// network I have noticed bad event syncronisation problems when XSync
// is not used, so I decided to use it.
XSync( _glfwLibrary.Dpy, False );
// Empty the window event queue
while( XPending( _glfwLibrary.Dpy ) )
{
if( _glfwGetNextEvent() )
{
winclosed = GL_TRUE;
}
}
// Did we get mouse movement in locked cursor mode?
if( _glfwInput.MouseMoved && _glfwWin.MouseLock )
{
int maxx, minx, maxy, miny;
// Calculate movement threshold
minx = _glfwWin.Width / 4;
maxx = (_glfwWin.Width * 3) / 4;
miny = _glfwWin.Height / 4;
maxy = (_glfwWin.Height * 3) / 4;
// Did the mouse cursor move beyond our movement threshold
if(_glfwInput.CursorPosX < minx || _glfwInput.CursorPosX > maxx ||
_glfwInput.CursorPosY < miny || _glfwInput.CursorPosY > maxy)
{
// Move the mouse pointer back to the window center so that it
// does not wander off...
_glfwPlatformSetMouseCursorPos( _glfwWin.Width/2,
_glfwWin.Height/2 );
XSync( _glfwLibrary.Dpy, False );
}
}
// Was the window (un)iconified?
if( _glfwWin.MapNotifyCount < 0 && !_glfwWin.Iconified )
{
// Show mouse pointer
if( _glfwWin.PointerHidden )
{
XUndefineCursor( _glfwLibrary.Dpy, _glfwWin.Win );
_glfwWin.PointerHidden = GL_FALSE;
}
// Un-grab mouse pointer
if( _glfwWin.PointerGrabbed )
{
XUngrabPointer( _glfwLibrary.Dpy, CurrentTime );
_glfwWin.PointerGrabbed = GL_FALSE;
}
_glfwWin.Iconified = GL_TRUE;
}
else if( _glfwWin.MapNotifyCount > 0 && _glfwWin.Iconified )
{
// Restore fullscreen mode properties
if( _glfwWin.Fullscreen )
{
// Change back video mode to user selected mode
_glfwSetVideoMode( _glfwWin.Scrn, &_glfwWin.Width,
&_glfwWin.Height, &_glfwWin.RefreshRate );
// Disable window manager decorations
_glfwEnableDecorations();
// Make sure window is in upper left corner
XMoveWindow( _glfwLibrary.Dpy, _glfwWin.Win, 0, 0 );
// Get input focus
XSetInputFocus( _glfwLibrary.Dpy, _glfwWin.Win,
RevertToParent, CurrentTime );
}
// Hide cursor if necessary
if( _glfwWin.MouseLock && !_glfwWin.PointerHidden )
{
if( !_glfwWin.PointerHidden )
{
XDefineCursor( _glfwLibrary.Dpy, _glfwWin.Win,
_glfwCreateNULLCursor( _glfwLibrary.Dpy,
_glfwWin.Win ) );
_glfwWin.PointerHidden = GL_TRUE;
}
}
// Grab cursor if necessary
if( (_glfwWin.MouseLock || _glfwWin.Fullscreen) &&
!_glfwWin.PointerGrabbed )
{
if( XGrabPointer( _glfwLibrary.Dpy, _glfwWin.Win, True,
ButtonPressMask | ButtonReleaseMask |
PointerMotionMask, GrabModeAsync,
GrabModeAsync, _glfwWin.Win, None,
CurrentTime ) == GrabSuccess )
{
_glfwWin.PointerGrabbed = GL_TRUE;
}
}
_glfwWin.Iconified = GL_FALSE;
}
// Did the window get/lose focus
if( _glfwWin.FocusInCount > 0 && !_glfwWin.Active )
{
// If we are in fullscreen mode, restore window
if( _glfwWin.Fullscreen && _glfwWin.Iconified )
{
_glfwPlatformRestoreWindow();
}
// Window is now active
_glfwWin.Active = GL_TRUE;
}
else if( _glfwWin.FocusInCount < 0 && _glfwWin.Active )
{
// If we are in fullscreen mode, iconfify window
if( _glfwWin.Fullscreen )
{
_glfwPlatformIconifyWindow();
}
// Window is not active
_glfwWin.Active = GL_FALSE;
_glfwInputDeactivation();
}
// Was there a window close request?
if( winclosed && _glfwWin.WindowCloseCallback )
{
// Check if the program wants us to close the window
winclosed = _glfwWin.WindowCloseCallback();
}
if( winclosed )
{
glfwCloseWindow();
}
}
//========================================================================
// _glfwPlatformWaitEvents() - Wait for new window and input events
//========================================================================
void _glfwPlatformWaitEvents( void )
{
XEvent event;
// Wait for new events (blocking)
XNextEvent( _glfwLibrary.Dpy, &event );
XPutBackEvent( _glfwLibrary.Dpy, &event );
// Poll events from queue
_glfwPlatformPollEvents();
}
//========================================================================
// _glfwPlatformHideMouseCursor() - Hide mouse cursor (lock it)
//========================================================================
void _glfwPlatformHideMouseCursor( void )
{
// Hide cursor
if( !_glfwWin.PointerHidden )
{
XDefineCursor( _glfwLibrary.Dpy, _glfwWin.Win,
_glfwCreateNULLCursor( _glfwLibrary.Dpy,
_glfwWin.Win ) );
_glfwWin.PointerHidden = GL_TRUE;
}
// Grab cursor to user window
if( !_glfwWin.PointerGrabbed )
{
if( XGrabPointer( _glfwLibrary.Dpy, _glfwWin.Win, True,
ButtonPressMask | ButtonReleaseMask |
PointerMotionMask, GrabModeAsync, GrabModeAsync,
_glfwWin.Win, None, CurrentTime ) ==
GrabSuccess )
{
_glfwWin.PointerGrabbed = GL_TRUE;
}
}
}
//========================================================================
// _glfwPlatformShowMouseCursor() - 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 && !_glfwWin.Fullscreen )
{
XUngrabPointer( _glfwLibrary.Dpy, CurrentTime );
_glfwWin.PointerGrabbed = GL_FALSE;
}
// Show cursor
if( _glfwWin.PointerHidden )
{
XUndefineCursor( _glfwLibrary.Dpy, _glfwWin.Win );
_glfwWin.PointerHidden = GL_FALSE;
}
}
//========================================================================
// _glfwPlatformSetMouseCursorPos() - Set physical mouse cursor position
//========================================================================
void _glfwPlatformSetMouseCursorPos( int x, int y )
{
// Change cursor position
_glfwInput.CursorPosX = x;
_glfwInput.CursorPosY = y;
XWarpPointer( _glfwLibrary.Dpy, None, _glfwWin.Win, 0,0,0,0, x, y );
}