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SDL_x11video.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
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#include <unistd.h> /* For getpid() and readlink() */
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#include "SDL_video.h"
#include "SDL_mouse.h"
#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#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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#if SDL_VIDEO_DRIVER_PANDORA
#include "SDL_x11opengles.h"
#endif
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/* Initialization/Query functions */
static int X11_VideoInit(_THIS);
static void X11_VideoQuit(_THIS);
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/* Find out what class name we should use */
static char *
get_classname()
{
char *spot;
#if defined(__LINUX__) || defined(__FREEBSD__)
char procfile[1024];
char linkfile[1024];
int linksize;
#endif
/* First allow environment variable override */
spot = SDL_getenv("SDL_VIDEO_X11_WMCLASS");
if (spot) {
return SDL_strdup(spot);
}
/* Next look at the application's executable name */
#if defined(__LINUX__) || defined(__FREEBSD__)
#if defined(__LINUX__)
SDL_snprintf(procfile, SDL_arraysize(procfile), "/proc/%d/exe", getpid());
#elif defined(__FREEBSD__)
SDL_snprintf(procfile, SDL_arraysize(procfile), "/proc/%d/file",
getpid());
#else
#error Where can we find the executable name?
#endif
linksize = readlink(procfile, linkfile, sizeof(linkfile) - 1);
if (linksize > 0) {
linkfile[linksize] = '\0';
spot = SDL_strrchr(linkfile, '/');
if (spot) {
return SDL_strdup(spot + 1);
} else {
return SDL_strdup(linkfile);
}
}
#endif /* __LINUX__ || __FREEBSD__ */
/* Finally use the default we've used forever */
return SDL_strdup("SDL_App");
}
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/* X11 driver bootstrap functions */
static int
X11_Available(void)
{
Display *display = NULL;
if (SDL_X11_LoadSymbols()) {
display = XOpenDisplay(NULL);
if (display != NULL) {
XCloseDisplay(display);
}
SDL_X11_UnloadSymbols();
}
return (display != NULL);
}
static void
X11_DeleteDevice(SDL_VideoDevice * device)
{
SDL_VideoData *data = (SDL_VideoData *) device->driverdata;
if (data->display) {
XCloseDisplay(data->display);
}
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SDL_free(data->windowlist);
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SDL_free(device->driverdata);
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#if SDL_VIDEO_DRIVER_PANDORA
SDL_free(device->gles_data);
#endif
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SDL_free(device);
SDL_X11_UnloadSymbols();
}
static SDL_VideoDevice *
X11_CreateDevice(int devindex)
{
SDL_VideoDevice *device;
SDL_VideoData *data;
const char *display = NULL; /* Use the DISPLAY environment variable */
if (!SDL_X11_LoadSymbols()) {
return NULL;
}
/* Initialize all variables that we clean on shutdown */
device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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if (!device) {
SDL_OutOfMemory();
return NULL;
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}
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data = (struct SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
if (!data) {
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SDL_OutOfMemory();
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SDL_free(device);
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return NULL;
}
device->driverdata = data;
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#if SDL_VIDEO_DRIVER_PANDORA
device->gles_data = (struct SDL_PrivateGLESData *) SDL_calloc(1, sizeof(SDL_PrivateGLESData));
if (!device->gles_data) {
SDL_OutOfMemory();
return NULL;
}
#endif
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/* FIXME: Do we need this?
if ( (SDL_strncmp(XDisplayName(display), ":", 1) == 0) ||
(SDL_strncmp(XDisplayName(display), "unix:", 5) == 0) ) {
local_X11 = 1;
} else {
local_X11 = 0;
}
*/
data->display = XOpenDisplay(display);
#if defined(__osf__) && defined(SDL_VIDEO_DRIVER_X11_DYNAMIC)
/* On Tru64 if linking without -lX11, it fails and you get following message.
* Xlib: connection to ":0.0" refused by server
* Xlib: XDM authorization key matches an existing client!
*
* It succeeds if retrying 1 second later
* or if running xhost +localhost on shell.
*/
if (data->display == NULL) {
SDL_Delay(1000);
data->display = XOpenDisplay(display);
}
#endif
if (data->display == NULL) {
SDL_free(device);
SDL_SetError("Couldn't open X11 display");
return NULL;
}
#ifdef X11_DEBUG
XSynchronize(data->display, True);
#endif
/* Set the function pointers */
device->VideoInit = X11_VideoInit;
device->VideoQuit = X11_VideoQuit;
device->GetDisplayModes = X11_GetDisplayModes;
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;
device->CreateWindowFrom = X11_CreateWindowFrom;
device->SetWindowTitle = X11_SetWindowTitle;
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device->SetWindowIcon = X11_SetWindowIcon;
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device->SetWindowPosition = X11_SetWindowPosition;
device->SetWindowSize = X11_SetWindowSize;
device->ShowWindow = X11_ShowWindow;
device->HideWindow = X11_HideWindow;
device->RaiseWindow = X11_RaiseWindow;
device->MaximizeWindow = X11_MaximizeWindow;
device->MinimizeWindow = X11_MinimizeWindow;
device->RestoreWindow = X11_RestoreWindow;
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device->SetWindowFullscreen = X11_SetWindowFullscreen;
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device->SetWindowGrab = X11_SetWindowGrab;
device->DestroyWindow = X11_DestroyWindow;
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device->CreateWindowFramebuffer = X11_CreateWindowFramebuffer;
device->UpdateWindowFramebuffer = X11_UpdateWindowFramebuffer;
device->DestroyWindowFramebuffer = X11_DestroyWindowFramebuffer;
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device->GetWindowWMInfo = X11_GetWindowWMInfo;
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device->shape_driver.CreateShaper = X11_CreateShaper;
device->shape_driver.SetWindowShape = X11_SetWindowShape;
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;
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;
device->GL_MakeCurrent = X11_GL_MakeCurrent;
device->GL_SetSwapInterval = X11_GL_SetSwapInterval;
device->GL_GetSwapInterval = X11_GL_GetSwapInterval;
device->GL_SwapWindow = X11_GL_SwapWindow;
device->GL_DeleteContext = X11_GL_DeleteContext;
#endif
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#if SDL_VIDEO_DRIVER_PANDORA
device->GL_LoadLibrary = X11_GLES_LoadLibrary;
device->GL_GetProcAddress = X11_GLES_GetProcAddress;
device->GL_UnloadLibrary = X11_GLES_UnloadLibrary;
device->GL_CreateContext = X11_GLES_CreateContext;
device->GL_MakeCurrent = X11_GLES_MakeCurrent;
device->GL_SetSwapInterval = X11_GLES_SetSwapInterval;
device->GL_GetSwapInterval = X11_GLES_GetSwapInterval;
device->GL_SwapWindow = X11_GLES_SwapWindow;
device->GL_DeleteContext = X11_GLES_DeleteContext;
#endif
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device->SetClipboardText = X11_SetClipboardText;
device->GetClipboardText = X11_GetClipboardText;
device->HasClipboardText = X11_HasClipboardText;
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device->free = X11_DeleteDevice;
return device;
}
VideoBootStrap X11_bootstrap = {
"x11", "SDL X11 video driver",
X11_Available, X11_CreateDevice
};
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static int (*handler) (Display *, XErrorEvent *) = NULL;
static int
X11_CheckWindowManagerErrorHandler(Display * d, XErrorEvent * e)
{
if (e->error_code == BadWindow) {
return (0);
} else {
return (handler(d, e));
}
}
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static void
X11_CheckWindowManager(_THIS)
{
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
Display *display = data->display;
Atom _NET_SUPPORTING_WM_CHECK;
int status, real_format;
Atom real_type;
unsigned long items_read, items_left;
unsigned char *propdata;
Window wm_window = 0;
#ifdef DEBUG_WINDOW_MANAGER
char *wm_name;
#endif
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/* Set up a handler to gracefully catch errors */
XSync(display, False);
handler = XSetErrorHandler(X11_CheckWindowManagerErrorHandler);
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_NET_SUPPORTING_WM_CHECK = XInternAtom(display, "_NET_SUPPORTING_WM_CHECK", False);
status = XGetWindowProperty(display, DefaultRootWindow(display), _NET_SUPPORTING_WM_CHECK, 0L, 1L, False, XA_WINDOW, &real_type, &real_format, &items_read, &items_left, &propdata);
if (status == Success && items_read) {
wm_window = ((Window*)propdata)[0];
}
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if (propdata) {
XFree(propdata);
}
if (wm_window) {
status = XGetWindowProperty(display, wm_window, _NET_SUPPORTING_WM_CHECK, 0L, 1L, False, XA_WINDOW, &real_type, &real_format, &items_read, &items_left, &propdata);
if (status != Success || !items_read || wm_window != ((Window*)propdata)[0]) {
wm_window = None;
}
if (propdata) {
XFree(propdata);
}
}
/* Reset the error handler, we're done checking */
XSync(display, False);
XSetErrorHandler(handler);
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if (!wm_window) {
#ifdef DEBUG_WINDOW_MANAGER
printf("Couldn't get _NET_SUPPORTING_WM_CHECK property\n");
#endif
return;
}
data->net_wm = SDL_TRUE;
#ifdef DEBUG_WINDOW_MANAGER
wm_name = X11_GetWindowTitle(_this, wm_window);
printf("Window manager: %s\n", wm_name);
SDL_free(wm_name);
#endif
}
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int
X11_VideoInit(_THIS)
{
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SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
/* Get the window class name, usually the name of the application */
data->classname = get_classname();
/* Open a connection to the X input manager */
#ifdef X_HAVE_UTF8_STRING
if (SDL_X11_HAVE_UTF8) {
data->im =
XOpenIM(data->display, NULL, data->classname, data->classname);
}
#endif
/* Look up some useful Atoms */
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#define GET_ATOM(X) data->X = XInternAtom(data->display, #X, False)
GET_ATOM(WM_DELETE_WINDOW);
GET_ATOM(_NET_WM_STATE);
GET_ATOM(_NET_WM_STATE_HIDDEN);
GET_ATOM(_NET_WM_STATE_MAXIMIZED_VERT);
GET_ATOM(_NET_WM_STATE_MAXIMIZED_HORZ);
GET_ATOM(_NET_WM_STATE_FULLSCREEN);
GET_ATOM(_NET_WM_NAME);
GET_ATOM(_NET_WM_ICON_NAME);
GET_ATOM(_NET_WM_ICON);
GET_ATOM(UTF8_STRING);
/* Detect the window manager */
X11_CheckWindowManager(_this);
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if (X11_InitModes(_this) < 0) {
return -1;
}
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if (X11_InitKeyboard(_this) != 0) {
return -1;
}
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X11_InitMouse(_this);
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X11_InitTouch(_this);
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return 0;
}
void
X11_VideoQuit(_THIS)
{
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SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
if (data->classname) {
SDL_free(data->classname);
}
#ifdef X_HAVE_UTF8_STRING
if (data->im) {
XCloseIM(data->im);
}
#endif
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X11_QuitModes(_this);
X11_QuitKeyboard(_this);
X11_QuitMouse(_this);
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X11_QuitTouch(_this);
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}
/* vim: set ts=4 sw=4 expandtab: */