src/video/x11/SDL_x11video.c
author Ryan C. Gordon <icculus@icculus.org>
Mon, 06 Apr 2015 00:10:54 -0400
changeset 9458 543298b36b28
parent 8953 dc80dc0bd22e
child 9619 b94b6d0bff0f
permissions -rw-r--r--
This function can be static.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_X11
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#include <unistd.h> /* For getpid() and readlink() */
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#include "SDL_video.h"
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#include "SDL_mouse.h"
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#include "../SDL_sysvideo.h"
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#include "../SDL_pixels_c.h"
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#include "SDL_x11video.h"
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#include "SDL_x11framebuffer.h"
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#include "SDL_x11shape.h"
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#include "SDL_x11touch.h"
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#include "SDL_x11xinput2.h"
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#if SDL_VIDEO_OPENGL_EGL
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#include "SDL_x11opengles.h"
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#endif
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/* Initialization/Query functions */
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static int X11_VideoInit(_THIS);
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static void X11_VideoQuit(_THIS);
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/* Find out what class name we should use */
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static char *
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get_classname()
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{
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    char *spot;
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#if defined(__LINUX__) || defined(__FREEBSD__)
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    char procfile[1024];
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    char linkfile[1024];
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    int linksize;
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#endif
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    /* First allow environment variable override */
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    spot = SDL_getenv("SDL_VIDEO_X11_WMCLASS");
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    if (spot) {
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        return SDL_strdup(spot);
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    }
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    /* Next look at the application's executable name */
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#if defined(__LINUX__) || defined(__FREEBSD__)
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#if defined(__LINUX__)
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    SDL_snprintf(procfile, SDL_arraysize(procfile), "/proc/%d/exe", getpid());
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#elif defined(__FREEBSD__)
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    SDL_snprintf(procfile, SDL_arraysize(procfile), "/proc/%d/file",
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                 getpid());
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#else
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#error Where can we find the executable name?
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#endif
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    linksize = readlink(procfile, linkfile, sizeof(linkfile) - 1);
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    if (linksize > 0) {
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        linkfile[linksize] = '\0';
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        spot = SDL_strrchr(linkfile, '/');
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        if (spot) {
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            return SDL_strdup(spot + 1);
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        } else {
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            return SDL_strdup(linkfile);
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        }
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    }
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#endif /* __LINUX__ || __FREEBSD__ */
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    /* Finally use the default we've used forever */
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    return SDL_strdup("SDL_App");
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}
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/* X11 driver bootstrap functions */
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static int
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X11_Available(void)
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{
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    Display *display = NULL;
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    if (SDL_X11_LoadSymbols()) {
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        display = X11_XOpenDisplay(NULL);
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        if (display != NULL) {
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            X11_XCloseDisplay(display);
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        }
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        SDL_X11_UnloadSymbols();
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    }
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    return (display != NULL);
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}
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static void
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X11_DeleteDevice(SDL_VideoDevice * device)
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{
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    SDL_VideoData *data = (SDL_VideoData *) device->driverdata;
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    if (data->display) {
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        X11_XCloseDisplay(data->display);
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    }
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    SDL_free(data->windowlist);
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    SDL_free(device->driverdata);
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    SDL_free(device);
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    SDL_X11_UnloadSymbols();
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}
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/* An error handler to reset the vidmode and then call the default handler. */
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static SDL_bool safety_net_triggered = SDL_FALSE;
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static int (*orig_x11_errhandler) (Display *, XErrorEvent *) = NULL;
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static int
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X11_SafetyNetErrHandler(Display * d, XErrorEvent * e)
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{
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    SDL_VideoDevice *device = NULL;
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    /* if we trigger an error in our error handler, don't try again. */
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    if (!safety_net_triggered) {
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        safety_net_triggered = SDL_TRUE;
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        device = SDL_GetVideoDevice();
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        if (device != NULL) {
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            int i;
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            for (i = 0; i < device->num_displays; i++) {
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                SDL_VideoDisplay *display = &device->displays[i];
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                if (SDL_memcmp(&display->current_mode, &display->desktop_mode,
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                               sizeof (SDL_DisplayMode)) != 0) {
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                    X11_SetDisplayMode(device, display, &display->desktop_mode);
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                }
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            }
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        }
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    }
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    if (orig_x11_errhandler != NULL) {
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        return orig_x11_errhandler(d, e);  /* probably terminate. */
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    }
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    return 0;
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}
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static SDL_VideoDevice *
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X11_CreateDevice(int devindex)
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{
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    SDL_VideoDevice *device;
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    SDL_VideoData *data;
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    const char *display = NULL; /* Use the DISPLAY environment variable */
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    if (!SDL_X11_LoadSymbols()) {
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        return NULL;
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    }
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    /* Need for threading gl calls. This is also required for the proprietary
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        nVidia driver to be threaded. */
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    X11_XInitThreads();
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    /* Initialize all variables that we clean on shutdown */
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    device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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    if (!device) {
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        SDL_OutOfMemory();
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        return NULL;
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    }
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    data = (struct SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
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    if (!data) {
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        SDL_free(device);
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        SDL_OutOfMemory();
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        return NULL;
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    }
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    device->driverdata = data;
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    /* FIXME: Do we need this?
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       if ( (SDL_strncmp(X11_XDisplayName(display), ":", 1) == 0) ||
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       (SDL_strncmp(X11_XDisplayName(display), "unix:", 5) == 0) ) {
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       local_X11 = 1;
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       } else {
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       local_X11 = 0;
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       }
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     */
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    data->display = X11_XOpenDisplay(display);
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#if defined(__osf__) && defined(SDL_VIDEO_DRIVER_X11_DYNAMIC)
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    /* On Tru64 if linking without -lX11, it fails and you get following message.
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     * Xlib: connection to ":0.0" refused by server
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     * Xlib: XDM authorization key matches an existing client!
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     *
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     * It succeeds if retrying 1 second later
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     * or if running xhost +localhost on shell.
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     */
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    if (data->display == NULL) {
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        SDL_Delay(1000);
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        data->display = X11_XOpenDisplay(display);
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    }
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#endif
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    if (data->display == NULL) {
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        SDL_free(device->driverdata);
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        SDL_free(device);
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        SDL_SetError("Couldn't open X11 display");
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        return NULL;
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    }
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#ifdef X11_DEBUG
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    X11_XSynchronize(data->display, True);
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#endif
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    /* Hook up an X11 error handler to recover the desktop resolution. */
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    safety_net_triggered = SDL_FALSE;
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    orig_x11_errhandler = X11_XSetErrorHandler(X11_SafetyNetErrHandler);
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    /* Set the function pointers */
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    device->VideoInit = X11_VideoInit;
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    device->VideoQuit = X11_VideoQuit;
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    device->GetDisplayModes = X11_GetDisplayModes;
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    device->GetDisplayBounds = X11_GetDisplayBounds;
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    device->SetDisplayMode = X11_SetDisplayMode;
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    device->SuspendScreenSaver = X11_SuspendScreenSaver;
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    device->PumpEvents = X11_PumpEvents;
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    device->CreateWindow = X11_CreateWindow;
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    device->CreateWindowFrom = X11_CreateWindowFrom;
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    device->SetWindowTitle = X11_SetWindowTitle;
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    device->SetWindowIcon = X11_SetWindowIcon;
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    device->SetWindowPosition = X11_SetWindowPosition;
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    device->SetWindowSize = X11_SetWindowSize;
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    device->SetWindowMinimumSize = X11_SetWindowMinimumSize;
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    device->SetWindowMaximumSize = X11_SetWindowMaximumSize;
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    device->ShowWindow = X11_ShowWindow;
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    device->HideWindow = X11_HideWindow;
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    device->RaiseWindow = X11_RaiseWindow;
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    device->MaximizeWindow = X11_MaximizeWindow;
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    device->MinimizeWindow = X11_MinimizeWindow;
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    device->RestoreWindow = X11_RestoreWindow;
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    device->SetWindowBordered = X11_SetWindowBordered;
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    device->SetWindowFullscreen = X11_SetWindowFullscreen;
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    device->SetWindowGammaRamp = X11_SetWindowGammaRamp;
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    device->SetWindowGrab = X11_SetWindowGrab;
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    device->DestroyWindow = X11_DestroyWindow;
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    device->CreateWindowFramebuffer = X11_CreateWindowFramebuffer;
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    device->UpdateWindowFramebuffer = X11_UpdateWindowFramebuffer;
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    device->DestroyWindowFramebuffer = X11_DestroyWindowFramebuffer;
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    device->GetWindowWMInfo = X11_GetWindowWMInfo;
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    device->SetWindowHitTest = X11_SetWindowHitTest;
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    device->shape_driver.CreateShaper = X11_CreateShaper;
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    device->shape_driver.SetWindowShape = X11_SetWindowShape;
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    device->shape_driver.ResizeWindowShape = X11_ResizeWindowShape;
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#if SDL_VIDEO_OPENGL_GLX
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    device->GL_LoadLibrary = X11_GL_LoadLibrary;
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    device->GL_GetProcAddress = X11_GL_GetProcAddress;
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    device->GL_UnloadLibrary = X11_GL_UnloadLibrary;
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    device->GL_CreateContext = X11_GL_CreateContext;
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    device->GL_MakeCurrent = X11_GL_MakeCurrent;
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    device->GL_SetSwapInterval = X11_GL_SetSwapInterval;
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    device->GL_GetSwapInterval = X11_GL_GetSwapInterval;
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    device->GL_SwapWindow = X11_GL_SwapWindow;
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    device->GL_DeleteContext = X11_GL_DeleteContext;
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#elif SDL_VIDEO_OPENGL_EGL
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    device->GL_LoadLibrary = X11_GLES_LoadLibrary;
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    device->GL_GetProcAddress = X11_GLES_GetProcAddress;
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    device->GL_UnloadLibrary = X11_GLES_UnloadLibrary;
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    device->GL_CreateContext = X11_GLES_CreateContext;
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    device->GL_MakeCurrent = X11_GLES_MakeCurrent;
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    device->GL_SetSwapInterval = X11_GLES_SetSwapInterval;
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    device->GL_GetSwapInterval = X11_GLES_GetSwapInterval;
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    device->GL_SwapWindow = X11_GLES_SwapWindow;
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    device->GL_DeleteContext = X11_GLES_DeleteContext;
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#endif
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    device->SetClipboardText = X11_SetClipboardText;
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    device->GetClipboardText = X11_GetClipboardText;
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    device->HasClipboardText = X11_HasClipboardText;
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    device->StartTextInput = X11_StartTextInput;
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    device->StopTextInput = X11_StopTextInput;
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    device->SetTextInputRect = X11_SetTextInputRect;
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    device->free = X11_DeleteDevice;
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    return device;
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}
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VideoBootStrap X11_bootstrap = {
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    "x11", "SDL X11 video driver",
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    X11_Available, X11_CreateDevice
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};
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static int (*handler) (Display *, XErrorEvent *) = NULL;
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static int
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X11_CheckWindowManagerErrorHandler(Display * d, XErrorEvent * e)
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{
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    if (e->error_code == BadWindow) {
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        return (0);
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    } else {
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        return (handler(d, e));
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    }
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}
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static void
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X11_CheckWindowManager(_THIS)
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{
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    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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    Display *display = data->display;
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    Atom _NET_SUPPORTING_WM_CHECK;
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    int status, real_format;
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    Atom real_type;
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    unsigned long items_read = 0, items_left = 0;
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    unsigned char *propdata = NULL;
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    Window wm_window = 0;
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#ifdef DEBUG_WINDOW_MANAGER
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    char *wm_name;
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#endif
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    /* Set up a handler to gracefully catch errors */
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    X11_XSync(display, False);
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    handler = X11_XSetErrorHandler(X11_CheckWindowManagerErrorHandler);
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    _NET_SUPPORTING_WM_CHECK = X11_XInternAtom(display, "_NET_SUPPORTING_WM_CHECK", False);
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    status = X11_XGetWindowProperty(display, DefaultRootWindow(display), _NET_SUPPORTING_WM_CHECK, 0L, 1L, False, XA_WINDOW, &real_type, &real_format, &items_read, &items_left, &propdata);
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    if (status == Success) {
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        if (items_read) {
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            wm_window = ((Window*)propdata)[0];
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        }
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        if (propdata) {
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            X11_XFree(propdata);
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            propdata = NULL;
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        }
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    }
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    if (wm_window) {
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        status = X11_XGetWindowProperty(display, wm_window, _NET_SUPPORTING_WM_CHECK, 0L, 1L, False, XA_WINDOW, &real_type, &real_format, &items_read, &items_left, &propdata);
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        if (status != Success || !items_read || wm_window != ((Window*)propdata)[0]) {
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            wm_window = None;
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        }
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        if (status == Success && propdata) {
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            X11_XFree(propdata);
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            propdata = NULL;
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        }
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    }
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    /* Reset the error handler, we're done checking */
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    X11_XSync(display, False);
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    X11_XSetErrorHandler(handler);
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    if (!wm_window) {
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#ifdef DEBUG_WINDOW_MANAGER
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        printf("Couldn't get _NET_SUPPORTING_WM_CHECK property\n");
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#endif
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        return;
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    }
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    data->net_wm = SDL_TRUE;
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#ifdef DEBUG_WINDOW_MANAGER
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    wm_name = X11_GetWindowTitle(_this, wm_window);
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    printf("Window manager: %s\n", wm_name);
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    SDL_free(wm_name);
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   360
#endif
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   361
}
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   362
icculus@6774
   363
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   364
int
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   365
X11_VideoInit(_THIS)
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   366
{
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   367
    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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   368
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   369
    /* Get the window class name, usually the name of the application */
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   370
    data->classname = get_classname();
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   371
mail@6167
   372
    /* Get the process PID to be associated to the window */
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   373
    data->pid = getpid();
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   374
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   375
    /* Open a connection to the X input manager */
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   376
#ifdef X_HAVE_UTF8_STRING
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   377
    if (SDL_X11_HAVE_UTF8) {
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   378
        data->im =
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   379
            X11_XOpenIM(data->display, NULL, data->classname, data->classname);
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   380
    }
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   381
#endif
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   382
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   383
    /* Look up some useful Atoms */
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   384
#define GET_ATOM(X) data->X = X11_XInternAtom(data->display, #X, False)
icculus@6637
   385
    GET_ATOM(WM_PROTOCOLS);
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   386
    GET_ATOM(WM_DELETE_WINDOW);
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   387
    GET_ATOM(_NET_WM_STATE);
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   388
    GET_ATOM(_NET_WM_STATE_HIDDEN);
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   389
    GET_ATOM(_NET_WM_STATE_FOCUSED);
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   390
    GET_ATOM(_NET_WM_STATE_MAXIMIZED_VERT);
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   391
    GET_ATOM(_NET_WM_STATE_MAXIMIZED_HORZ);
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   392
    GET_ATOM(_NET_WM_STATE_FULLSCREEN);
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   393
    GET_ATOM(_NET_WM_ALLOWED_ACTIONS);
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   394
    GET_ATOM(_NET_WM_ACTION_FULLSCREEN);
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   395
    GET_ATOM(_NET_WM_NAME);
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   396
    GET_ATOM(_NET_WM_ICON_NAME);
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   397
    GET_ATOM(_NET_WM_ICON);
icculus@6638
   398
    GET_ATOM(_NET_WM_PING);
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   399
    GET_ATOM(_NET_ACTIVE_WINDOW);
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   400
    GET_ATOM(UTF8_STRING);
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   401
    GET_ATOM(PRIMARY);
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   402
    GET_ATOM(XdndEnter);
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   403
    GET_ATOM(XdndPosition);
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   404
    GET_ATOM(XdndStatus);
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   405
    GET_ATOM(XdndTypeList);
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   406
    GET_ATOM(XdndActionCopy);
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   407
    GET_ATOM(XdndDrop);
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   408
    GET_ATOM(XdndFinished);
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   409
    GET_ATOM(XdndSelection);
slouken@4518
   410
slouken@4518
   411
    /* Detect the window manager */
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   412
    X11_CheckWindowManager(_this);
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   413
slouken@3521
   414
    if (X11_InitModes(_this) < 0) {
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   415
        return -1;
slouken@3521
   416
    }
slouken@1950
   417
dimitris@6316
   418
    X11_InitXinput2(_this);
slouken@6311
   419
bob@2295
   420
    if (X11_InitKeyboard(_this) != 0) {
bob@2295
   421
        return -1;
bob@2295
   422
    }
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   423
    X11_InitMouse(_this);
slouken@1950
   424
jim@4645
   425
    X11_InitTouch(_this);
icculus@6774
   426
icculus@6774
   427
#if SDL_USE_LIBDBUS
alex@8889
   428
    SDL_DBus_Init();
icculus@6774
   429
#endif
icculus@6774
   430
slouken@1950
   431
    return 0;
slouken@1950
   432
}
slouken@1950
   433
slouken@1950
   434
void
slouken@1950
   435
X11_VideoQuit(_THIS)
slouken@1950
   436
{
slouken@1951
   437
    SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
slouken@1951
   438
slouken@7719
   439
    SDL_free(data->classname);
slouken@1951
   440
#ifdef X_HAVE_UTF8_STRING
slouken@1951
   441
    if (data->im) {
icculus@7827
   442
        X11_XCloseIM(data->im);
slouken@1951
   443
    }
slouken@1951
   444
#endif
slouken@1951
   445
slouken@1950
   446
    X11_QuitModes(_this);
slouken@1950
   447
    X11_QuitKeyboard(_this);
slouken@1950
   448
    X11_QuitMouse(_this);
jim@4645
   449
    X11_QuitTouch(_this);
icculus@6774
   450
icculus@6774
   451
#if SDL_USE_LIBDBUS
alex@8889
   452
    SDL_DBus_Quit();
icculus@6774
   453
#endif
slouken@1950
   454
}
slouken@1950
   455
slouken@5466
   456
SDL_bool
slouken@5466
   457
X11_UseDirectColorVisuals(void)
slouken@5466
   458
{
slouken@5466
   459
    return SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ? SDL_FALSE : SDL_TRUE;
slouken@5466
   460
}
slouken@5466
   461
slouken@5481
   462
#endif /* SDL_VIDEO_DRIVER_X11 */
slouken@5481
   463
slouken@1950
   464
/* vim: set ts=4 sw=4 expandtab: */