+/*
+ * freeglut_gamemode_x11.c
+ *
+ * The game mode handling code.
+ *
+ * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
+ * Written by Pawel W. Olszta, <olszta@sourceforge.net>
+ * Copied for Platform code by Evan Felix <karcaw at gmail.com>
+ * Creation date: Thur Feb 2 2012
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <GL/freeglut.h>
+#include "../Common/freeglut_internal.h"
+
+static int xrandr_resize(int xsz, int ysz, int rate, int just_checking)
+{
+#ifdef HAVE_X11_EXTENSIONS_XRANDR_H
+ int event_base, error_base, ver_major, ver_minor, use_rate;
+ XRRScreenConfiguration *xrr_config = 0;
+ Status result = -1;
+
+ /* must check at runtime for the availability of the extension */
+ if(!XRRQueryExtension(fgDisplay.pDisplay.Display, &event_base, &error_base)) {
+ return -1;
+ }
+
+ XRRQueryVersion(fgDisplay.pDisplay.Display, &ver_major, &ver_minor);
+
+ /* we only heed the rate if we CAN actually use it (Xrandr >= 1.1) and
+ * the user actually cares about it (rate > 0)
+ */
+ use_rate = ( rate > 0 ) && ( ( ver_major >= 1 ) ||
+ ( ( ver_major == 1 ) && ( ver_minor >= 1 ) ) );
+
+ /* this loop is only so that the whole thing will be repeated if someone
+ * else changes video mode between our query of the current information and
+ * the attempt to change it.
+ */
+ do {
+ XRRScreenSize *ssizes;
+ short *rates;
+ Rotation rot;
+ int i, ssizes_count, rates_count, curr, res_idx = -1;
+ Time timestamp, cfg_timestamp;
+
+ if(xrr_config) {
+ XRRFreeScreenConfigInfo(xrr_config);
+ }
+
+ if(!(xrr_config = XRRGetScreenInfo(fgDisplay.pDisplay.Display, fgDisplay.pDisplay.RootWindow))) {
+ fgWarning("XRRGetScreenInfo failed");
+ break;
+ }
+ ssizes = XRRConfigSizes(xrr_config, &ssizes_count);
+ curr = XRRConfigCurrentConfiguration(xrr_config, &rot);
+ timestamp = XRRConfigTimes(xrr_config, &cfg_timestamp);
+
+ /* if either of xsz or ysz are unspecified, use the current values */
+ if(xsz <= 0)
+ xsz = fgState.GameModeSize.X = ssizes[curr].width;
+ if(ysz <= 0)
+ ysz = fgState.GameModeSize.Y = ssizes[curr].height;
+
+
+ if(xsz == ssizes[curr].width && ysz == ssizes[curr].height) {
+ /* no need to switch, we're already in the requested resolution */
+ res_idx = curr;
+ } else {
+ for(i=0; i<ssizes_count; i++) {
+ if(ssizes[i].width == xsz && ssizes[i].height == ysz) {
+ res_idx = i;
+ break; /* found it */
+ }
+ }
+ }
+ if(res_idx == -1)
+ break; /* no matching resolution */
+
+#if ( RANDR_MAJOR >= 1 ) || ( ( RANDR_MAJOR == 1 ) && ( RANDR_MINOR >= 1 ) )
+ if(use_rate) {
+ rate = fgState.GameModeRefresh;
+
+ /* for the selected resolution, let's find out if there is
+ * a matching refresh rate available.
+ */
+ rates = XRRConfigRates(xrr_config, res_idx, &rates_count);
+
+ for(i=0; i<rates_count; i++) {
+ if(rates[i] == rate) {
+ break;
+ }
+ }
+ if(i == rates_count) {
+ break; /* no matching rate */
+ }
+ }
+#endif
+
+ if(just_checking) {
+ result = 0;
+ break;
+ }
+
+#if ( RANDR_MAJOR >= 1 ) || ( ( RANDR_MAJOR == 1 ) && ( RANDR_MINOR >= 1 ) )
+ if(use_rate)
+ result = XRRSetScreenConfigAndRate(fgDisplay.pDisplay.Display, xrr_config,
+ fgDisplay.pDisplay.RootWindow, res_idx, rot, rate, timestamp);
+ else
+#endif
+ result = XRRSetScreenConfig(fgDisplay.pDisplay.Display, xrr_config,
+ fgDisplay.pDisplay.RootWindow, res_idx, rot, timestamp);
+
+ } while(result == RRSetConfigInvalidTime);
+
+ if(xrr_config) {
+ XRRFreeScreenConfigInfo(xrr_config);
+ }
+
+ if(result == 0) {
+ return 0;
+ }
+
+#endif /* HAVE_X11_EXTENSIONS_XRANDR_H */
+ return -1;
+}
+
+/*
+ * Remembers the current visual settings, so that
+ * we can change them and restore later...
+ */
+void fgPlatformRememberState( void )
+{
+ int event_base, error_base;
+
+ /*
+ * Remember the current pointer location before going fullscreen
+ * for restoring it later:
+ */
+ Window junk_window;
+ unsigned int junk_mask;
+
+ XQueryPointer(fgDisplay.pDisplay.Display, fgDisplay.pDisplay.RootWindow,
+ &junk_window, &junk_window,
+ &fgDisplay.pDisplay.DisplayPointerX, &fgDisplay.pDisplay.DisplayPointerY,
+ &fgDisplay.pDisplay.DisplayPointerX, &fgDisplay.pDisplay.DisplayPointerY, &junk_mask);
+
+# ifdef HAVE_X11_EXTENSIONS_XRANDR_H
+ if(XRRQueryExtension(fgDisplay.pDisplay.Display, &event_base, &error_base)) {
+ XRRScreenConfiguration *xrr_config;
+ XRRScreenSize *ssizes;
+ Rotation rot;
+ int ssize_count, curr;
+
+ if((xrr_config = XRRGetScreenInfo(fgDisplay.pDisplay.Display, fgDisplay.pDisplay.RootWindow))) {
+ ssizes = XRRConfigSizes(xrr_config, &ssize_count);
+ curr = XRRConfigCurrentConfiguration(xrr_config, &rot);
+
+ fgDisplay.pDisplay.prev_xsz = ssizes[curr].width;
+ fgDisplay.pDisplay.prev_ysz = ssizes[curr].height;
+ fgDisplay.pDisplay.prev_refresh = -1;
+
+# if ( RANDR_MAJOR >= 1 ) || ( ( RANDR_MAJOR == 1 ) && ( RANDR_MINOR >= 1 ) )
+ if(fgState.GameModeRefresh != -1) {
+ fgDisplay.pDisplay.prev_refresh = XRRConfigCurrentRate(xrr_config);
+ }
+# endif
+
+ fgDisplay.pDisplay.prev_size_valid = 1;
+
+ XRRFreeScreenConfigInfo(xrr_config);
+ }
+ }
+# endif
+
+ /*
+ * This highly depends on the XFree86 extensions,
+ * not approved as X Consortium standards
+ */
+# ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
+ if(!XF86VidModeQueryExtension(fgDisplay.pDisplay.Display, &event_base, &error_base)) {
+ return;
+ }
+
+ /*
+ * Remember the current ViewPort location of the screen to be able to
+ * restore the ViewPort on LeaveGameMode():
+ */
+ if( !XF86VidModeGetViewPort(
+ fgDisplay.pDisplay.Display,
+ fgDisplay.pDisplay.Screen,
+ &fgDisplay.pDisplay.DisplayViewPortX,
+ &fgDisplay.pDisplay.DisplayViewPortY ) )
+ fgWarning( "XF86VidModeGetViewPort failed" );
+
+
+ /* Query the current display settings: */
+ fgDisplay.pDisplay.DisplayModeValid =
+ XF86VidModeGetModeLine(
+ fgDisplay.pDisplay.Display,
+ fgDisplay.pDisplay.Screen,
+ &fgDisplay.pDisplay.DisplayModeClock,
+ &fgDisplay.pDisplay.DisplayMode
+ );
+
+ if( !fgDisplay.pDisplay.DisplayModeValid )
+ fgWarning( "XF86VidModeGetModeLine failed" );
+# endif
+
+}
+
+/*
+ * Restores the previously remembered visual settings
+ */
+void fgPlatformRestoreState( void )
+{
+ /* Restore the remembered pointer position: */
+ XWarpPointer(
+ fgDisplay.pDisplay.Display, None, fgDisplay.pDisplay.RootWindow, 0, 0, 0, 0,
+ fgDisplay.pDisplay.DisplayPointerX, fgDisplay.pDisplay.DisplayPointerY
+ );
+
+
+# ifdef HAVE_X11_EXTENSIONS_XRANDR_H
+ if(fgDisplay.pDisplay.prev_size_valid) {
+ if(xrandr_resize(fgDisplay.pDisplay.prev_xsz, fgDisplay.pDisplay.prev_ysz, fgDisplay.pDisplay.prev_refresh, 0) != -1) {
+ fgDisplay.pDisplay.prev_size_valid = 0;
+# ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
+ fgDisplay.pDisplay.DisplayModeValid = 0;
+# endif
+ return;
+ }
+ }
+# endif
+
+
+
+# ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
+ /*
+ * This highly depends on the XFree86 extensions,
+ * not approved as X Consortium standards
+ */
+
+ if( fgDisplay.pDisplay.DisplayModeValid )
+ {
+ XF86VidModeModeInfo** displayModes;
+ int i, displayModesCount;
+
+ if( !XF86VidModeGetAllModeLines(
+ fgDisplay.pDisplay.Display,
+ fgDisplay.pDisplay.Screen,
+ &displayModesCount,
+ &displayModes ) )
+ {
+ fgWarning( "XF86VidModeGetAllModeLines failed" );
+ return;
+ }
+
+
+ /*
+ * Check every of the modes looking for one that matches our demands.
+ * If we find one, switch to it and restore the remembered viewport.
+ */
+ for( i = 0; i < displayModesCount; i++ )
+ {
+ if(displayModes[ i ]->hdisplay == fgDisplay.pDisplay.DisplayMode.hdisplay &&
+ displayModes[ i ]->vdisplay == fgDisplay.pDisplay.DisplayMode.vdisplay &&
+ displayModes[ i ]->dotclock == fgDisplay.pDisplay.DisplayModeClock )
+ {
+ if( !XF86VidModeSwitchToMode(
+ fgDisplay.pDisplay.Display,
+ fgDisplay.pDisplay.Screen,
+ displayModes[ i ] ) )
+ {
+ fgWarning( "XF86VidModeSwitchToMode failed" );
+ break;
+ }
+
+ if( !XF86VidModeSetViewPort(
+ fgDisplay.pDisplay.Display,
+ fgDisplay.pDisplay.Screen,
+ fgDisplay.pDisplay.DisplayViewPortX,
+ fgDisplay.pDisplay.DisplayViewPortY ) )
+ fgWarning( "XF86VidModeSetViewPort failed" );
+
+
+ /*
+ * For the case this would be the last X11 call the application
+ * calls exit() we've to flush the X11 output queue to have the
+ * commands sent to the X server before the application exits.
+ */
+ XFlush( fgDisplay.pDisplay.Display );
+
+ fgDisplay.pDisplay.DisplayModeValid = 0;
+# ifdef HAVE_X11_EXTENSIONS_XRANDR_H
+ fgDisplay.pDisplay.prev_size_valid = 0;
+# endif
+
+ break;
+ }
+ }
+ XFree( displayModes );
+ }
+
+# endif
+
+}
+
+#ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
+
+/*
+ * Checks a single display mode settings against user's preferences.
+ */
+static GLboolean fghCheckDisplayMode( int width, int height, int depth, int refresh )
+{
+ /* The desired values should be stored in fgState structure... */
+ return ( width == fgState.GameModeSize.X ) &&
+ ( height == fgState.GameModeSize.Y ) &&
+ ( depth == fgState.GameModeDepth ) &&
+ ( refresh == fgState.GameModeRefresh );
+}
+
+/*
+ * Checks all display modes settings against user's preferences.
+ * Returns the mode number found or -1 if none could be found.
+ */
+static int fghCheckDisplayModes( GLboolean exactMatch, int displayModesCount, XF86VidModeModeInfo** displayModes )
+{
+ int i;
+ for( i = 0; i < displayModesCount; i++ )
+ {
+ /* Compute the displays refresh rate, dotclock comes in kHz. */
+ int refresh = ( displayModes[ i ]->dotclock * 1000 ) /
+ ( displayModes[ i ]->htotal * displayModes[ i ]->vtotal );
+
+ if( fghCheckDisplayMode( displayModes[ i ]->hdisplay,
+ displayModes[ i ]->vdisplay,
+ fgState.GameModeDepth,
+ ( exactMatch ? refresh : fgState.GameModeRefresh ) ) ) {
+ if (!exactMatch)
+ {
+ /* Update the chosen refresh rate, otherwise a
+ * glutGameModeGet(GLUT_GAME_MODE_REFRESH_RATE) would not
+ * return the right values
+ */
+ fgState.GameModeRefresh = refresh;
+ }
+
+ return i;
+ }
+ }
+ return -1;
+}
+
+#endif
+
+/*
+ * Changes the current display mode to match user's settings
+ */
+GLboolean fgPlatformChangeDisplayMode( GLboolean haveToTest )
+{
+ GLboolean success = GL_FALSE;
+ /* first try to use XRandR, then fallback to XF86VidMode */
+# ifdef HAVE_X11_EXTENSIONS_XRANDR_H
+ if(xrandr_resize(fgState.GameModeSize.X, fgState.GameModeSize.Y,
+ fgState.GameModeRefresh, haveToTest) != -1) {
+ return GL_TRUE;
+ }
+# endif
+
+
+ /*
+ * This highly depends on the XFree86 extensions,
+ * not approved as X Consortium standards
+ */
+# ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
+
+ /*
+ * This is also used by applications which check modes by calling
+ * glutGameModeGet(GLUT_GAME_MODE_POSSIBLE), so allow the check:
+ */
+ if( haveToTest || fgDisplay.pDisplay.DisplayModeValid )
+ {
+ XF86VidModeModeInfo** displayModes;
+ int i, displayModesCount;
+
+ /* If we don't have a valid modeline in the display structure, which
+ * can happen if this is called from glutGameModeGet instead of
+ * glutEnterGameMode, then we need to query the current mode, to make
+ * unspecified settings to default to their current values.
+ */
+ if(!fgDisplay.pDisplay.DisplayModeValid) {
+ if(!XF86VidModeGetModeLine(fgDisplay.pDisplay.Display, fgDisplay.pDisplay.Screen,
+ &fgDisplay.pDisplay.DisplayModeClock, &fgDisplay.pDisplay.DisplayMode)) {
+ return success;
+ }
+ }
+
+ if (fgState.GameModeSize.X == -1)
+ {
+ fgState.GameModeSize.X = fgDisplay.pDisplay.DisplayMode.hdisplay;
+ }
+ if (fgState.GameModeSize.Y == -1)
+ {
+ fgState.GameModeSize.Y = fgDisplay.pDisplay.DisplayMode.vdisplay;
+ }
+ if (fgState.GameModeDepth == -1)
+ {
+ /* can't get color depth from this, nor can we change it, do nothing
+ * TODO: get with XGetVisualInfo()? but then how to set?
+ */
+ }
+ if (fgState.GameModeRefresh == -1)
+ {
+ /* Compute the displays refresh rate, dotclock comes in kHz. */
+ int refresh = ( fgDisplay.pDisplay.DisplayModeClock * 1000 ) /
+ ( fgDisplay.pDisplay.DisplayMode.htotal * fgDisplay.pDisplay.DisplayMode.vtotal );
+
+ fgState.GameModeRefresh = refresh;
+ }
+
+ /* query all possible display modes */
+ if( !XF86VidModeGetAllModeLines(
+ fgDisplay.pDisplay.Display,
+ fgDisplay.pDisplay.Screen,
+ &displayModesCount,
+ &displayModes ) )
+ {
+ fgWarning( "XF86VidModeGetAllModeLines failed" );
+ return success;
+ }
+
+
+ /*
+ * Check every of the modes looking for one that matches our demands,
+ * ignoring the refresh rate if no exact match could be found.
+ */
+ i = fghCheckDisplayModes( GL_TRUE, displayModesCount, displayModes );
+ if( i < 0 ) {
+ i = fghCheckDisplayModes( GL_FALSE, displayModesCount, displayModes );
+ }
+ success = ( i < 0 ) ? GL_FALSE : GL_TRUE;
+
+ if( !haveToTest && success ) {
+ if( !XF86VidModeSwitchToMode(
+ fgDisplay.pDisplay.Display,
+ fgDisplay.pDisplay.Screen,
+ displayModes[ i ] ) )
+ fgWarning( "XF86VidModeSwitchToMode failed" );
+ }
+
+ XFree( displayModes );
+ }
+
+# endif
+
+ return success;
+}
+
+
+void fgPlatformEnterGameMode( void )
+{
+
+ /*
+ * Sync needed to avoid a real race, the Xserver must have really created
+ * the window before we can grab the pointer into it:
+ */
+ XSync( fgDisplay.pDisplay.Display, False );
+ /*
+ * Grab the pointer to confine it into the window after the calls to
+ * XWrapPointer() which ensure that the pointer really enters the window.
+ *
+ * We also need to wait here until XGrabPointer() returns GrabSuccess,
+ * otherwise the new window is not viewable yet and if the next function
+ * (XSetInputFocus) is called with a not yet viewable window, it will exit
+ * the application which we have to aviod, so wait until it's viewable:
+ */
+ while( GrabSuccess != XGrabPointer(
+ fgDisplay.pDisplay.Display, fgStructure.GameModeWindow->Window.Handle,
+ TRUE,
+ ButtonPressMask | ButtonReleaseMask | ButtonMotionMask
+ | PointerMotionMask,
+ GrabModeAsync, GrabModeAsync,
+ fgStructure.GameModeWindow->Window.Handle, None, CurrentTime) )
+ usleep( 100 );
+ /*
+ * Change input focus to the new window. This will exit the application
+ * if the new window is not viewable yet, see the XGrabPointer loop above.
+ */
+ XSetInputFocus(
+ fgDisplay.pDisplay.Display,
+ fgStructure.GameModeWindow->Window.Handle,
+ RevertToNone,
+ CurrentTime
+ );
+
+ /* Move the Pointer to the middle of the fullscreen window */
+ XWarpPointer(
+ fgDisplay.pDisplay.Display,
+ None,
+ fgDisplay.pDisplay.RootWindow,
+ 0, 0, 0, 0,
+ fgState.GameModeSize.X/2, fgState.GameModeSize.Y/2
+ );
+
+# ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
+
+ if( fgDisplay.pDisplay.DisplayModeValid )
+ {
+ int x, y;
+ Window child;
+
+ /* Change to viewport to the window topleft edge: */
+ if( !XF86VidModeSetViewPort( fgDisplay.pDisplay.Display, fgDisplay.pDisplay.Screen, 0, 0 ) )
+ fgWarning( "XF86VidModeSetViewPort failed" );
+
+ /*
+ * Final window repositioning: It could be avoided using an undecorated
+ * window using override_redirect, but this * would possily require
+ * more changes and investigation.
+ */
+
+ /* Get the current postion of the drawable area on screen */
+ XTranslateCoordinates(
+ fgDisplay.pDisplay.Display,
+ fgStructure.CurrentWindow->Window.Handle,
+ fgDisplay.pDisplay.RootWindow,
+ 0, 0, &x, &y,
+ &child
+ );
+
+ /* Move the decorataions out of the topleft corner of the display */
+ XMoveWindow( fgDisplay.pDisplay.Display, fgStructure.CurrentWindow->Window.Handle,
+ -x, -y);
+ }
+
+#endif
+
+ /* Grab the keyboard, too */
+ XGrabKeyboard(
+ fgDisplay.pDisplay.Display,
+ fgStructure.GameModeWindow->Window.Handle,
+ FALSE,
+ GrabModeAsync, GrabModeAsync,
+ CurrentTime
+ );
+
+}
+
+void fgPlatformLeaveGameMode( void )
+{
+ XUngrabPointer( fgDisplay.pDisplay.Display, CurrentTime );
+ XUngrabKeyboard( fgDisplay.pDisplay.Display, CurrentTime );
+}
+
projects / freeglut / blobdiff