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SDL_x11video.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* X11 based SDL video driver implementation.
Note: This implementation does not currently need X11 thread locking,
since the event thread uses a separate X connection and any
additional locking necessary is handled internally. However,
if full locking is neccessary, take a look at XInitThreads().
*/
#include <unistd.h>
#include <sys/ioctl.h>
#ifdef MTRR_SUPPORT
#include <asm/mtrr.h>
#include <sys/fcntl.h>
#endif
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#include "SDL_endian.h"
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#include "SDL_timer.h"
#include "SDL_thread.h"
#include "SDL_video.h"
#include "SDL_mouse.h"
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#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
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#include "SDL_x11video.h"
#include "SDL_x11wm_c.h"
#include "SDL_x11mouse_c.h"
#include "SDL_x11events_c.h"
#include "SDL_x11modes_c.h"
#include "SDL_x11image_c.h"
#include "SDL_x11yuv_c.h"
#include "SDL_x11gl_c.h"
#include "SDL_x11gamma_c.h"
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#include "../blank_cursor.h"
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#ifdef X_HAVE_UTF8_STRING
#include <locale.h>
#endif
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/* Initialization/Query functions */
static int X11_VideoInit(_THIS, SDL_PixelFormat *vformat);
static SDL_Surface *X11_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
static int X11_ToggleFullScreen(_THIS, int on);
static void X11_UpdateMouse(_THIS);
static int X11_SetColors(_THIS, int firstcolor, int ncolors,
SDL_Color *colors);
static int X11_SetGammaRamp(_THIS, Uint16 *ramp);
static void X11_VideoQuit(_THIS);
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/* X11 driver bootstrap functions */
static int X11_Available(void)
{
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Display *display = NULL;
if ( SDL_X11_LoadSymbols() ) {
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display = XOpenDisplay(NULL);
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if ( display != NULL ) {
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XCloseDisplay(display);
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}
SDL_X11_UnloadSymbols();
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}
return(display != NULL);
}
static void X11_DeleteDevice(SDL_VideoDevice *device)
{
if ( device ) {
if ( device->hidden ) {
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SDL_free(device->hidden);
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}
if ( device->gl_data ) {
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SDL_free(device->gl_data);
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}
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SDL_free(device);
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SDL_X11_UnloadSymbols();
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}
}
static SDL_VideoDevice *X11_CreateDevice(int devindex)
{
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SDL_VideoDevice *device = NULL;
if ( SDL_X11_LoadSymbols() ) {
/* Initialize all variables that we clean on shutdown */
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device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
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if ( device ) {
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SDL_memset(device, 0, (sizeof *device));
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device->hidden = (struct SDL_PrivateVideoData *)
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SDL_malloc((sizeof *device->hidden));
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SDL_memset(device->hidden, 0, (sizeof *device->hidden));
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device->gl_data = (struct SDL_PrivateGLData *)
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SDL_malloc((sizeof *device->gl_data));
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SDL_memset(device->gl_data, 0, (sizeof *device->gl_data));
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}
if ( (device == NULL) || (device->hidden == NULL) ||
(device->gl_data == NULL) ) {
SDL_OutOfMemory();
X11_DeleteDevice(device); /* calls SDL_X11_UnloadSymbols(). */
return(0);
}
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SDL_memset(device->hidden, 0, (sizeof *device->hidden));
SDL_memset(device->gl_data, 0, (sizeof *device->gl_data));
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/* Set the driver flags */
device->handles_any_size = 1;
/* Set the function pointers */
device->VideoInit = X11_VideoInit;
device->ListModes = X11_ListModes;
device->SetVideoMode = X11_SetVideoMode;
device->ToggleFullScreen = X11_ToggleFullScreen;
device->UpdateMouse = X11_UpdateMouse;
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#if SDL_VIDEO_DRIVER_X11_XV
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device->CreateYUVOverlay = X11_CreateYUVOverlay;
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#endif
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device->SetColors = X11_SetColors;
device->UpdateRects = NULL;
device->VideoQuit = X11_VideoQuit;
device->AllocHWSurface = X11_AllocHWSurface;
device->CheckHWBlit = NULL;
device->FillHWRect = NULL;
device->SetHWColorKey = NULL;
device->SetHWAlpha = NULL;
device->LockHWSurface = X11_LockHWSurface;
device->UnlockHWSurface = X11_UnlockHWSurface;
device->FlipHWSurface = X11_FlipHWSurface;
device->FreeHWSurface = X11_FreeHWSurface;
device->SetGamma = X11_SetVidModeGamma;
device->GetGamma = X11_GetVidModeGamma;
device->SetGammaRamp = X11_SetGammaRamp;
device->GetGammaRamp = NULL;
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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;
device->GL_GetAttribute = X11_GL_GetAttribute;
device->GL_MakeCurrent = X11_GL_MakeCurrent;
device->GL_SwapBuffers = X11_GL_SwapBuffers;
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#endif
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device->SetCaption = X11_SetCaption;
device->SetIcon = X11_SetIcon;
device->IconifyWindow = X11_IconifyWindow;
device->GrabInput = X11_GrabInput;
device->GetWMInfo = X11_GetWMInfo;
device->FreeWMCursor = X11_FreeWMCursor;
device->CreateWMCursor = X11_CreateWMCursor;
device->ShowWMCursor = X11_ShowWMCursor;
device->WarpWMCursor = X11_WarpWMCursor;
device->CheckMouseMode = X11_CheckMouseMode;
device->InitOSKeymap = X11_InitOSKeymap;
device->PumpEvents = X11_PumpEvents;
device->free = X11_DeleteDevice;
}
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return device;
}
VideoBootStrap X11_bootstrap = {
"x11", "X Window System",
X11_Available, X11_CreateDevice
};
/* Normal X11 error handler routine */
static int (*X_handler)(Display *, XErrorEvent *) = NULL;
static int x_errhandler(Display *d, XErrorEvent *e)
{
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#if SDL_VIDEO_DRIVER_X11_VIDMODE
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extern int vm_error;
#endif
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#if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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extern int dga_error;
#endif
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#if SDL_VIDEO_DRIVER_X11_VIDMODE
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/* VidMode errors are non-fatal. :) */
/* Are the errors offset by one from the error base?
e.g. the error base is 143, the code is 148, and the
actual error is XF86VidModeExtensionDisabled (4) ?
*/
if ( (vm_error >= 0) &&
(((e->error_code == BadRequest)&&(e->request_code == vm_error)) ||
((e->error_code > vm_error) &&
(e->error_code <= (vm_error+XF86VidModeNumberErrors)))) ) {
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#ifdef X11_DEBUG
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{ char errmsg[1024];
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XGetErrorText(d, e->error_code, errmsg, sizeof(errmsg));
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printf("VidMode error: %s\n", errmsg);
}
#endif
return(0);
}
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#endif /* SDL_VIDEO_DRIVER_X11_VIDMODE */
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#if SDL_VIDEO_DRIVER_X11_DGAMOUSE
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/* DGA errors can be non-fatal. :) */
if ( (dga_error >= 0) &&
((e->error_code > dga_error) &&
(e->error_code <= (dga_error+XF86DGANumberErrors))) ) {
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#ifdef X11_DEBUG
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{ char errmsg[1024];
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XGetErrorText(d, e->error_code, errmsg, sizeof(errmsg));
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printf("DGA error: %s\n", errmsg);
}
#endif
return(0);
}
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#endif /* SDL_VIDEO_DRIVER_X11_DGAMOUSE */
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return(X_handler(d,e));
}
/* X11 I/O error handler routine */
static int (*XIO_handler)(Display *) = NULL;
static int xio_errhandler(Display *d)
{
/* Ack! Lost X11 connection! */
/* We will crash if we try to clean up our display */
if ( current_video->hidden->Ximage ) {
SDL_VideoSurface->pixels = NULL;
}
current_video->hidden->X11_Display = NULL;
/* Continue with the standard X11 error handler */
return(XIO_handler(d));
}
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static int (*Xext_handler)(Display *, _Xconst char *, _Xconst char *) = NULL;
static int xext_errhandler(Display *d, _Xconst char *ext, _Xconst char *reason)
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{
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#ifdef X11_DEBUG
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printf("Xext error inside SDL (may be harmless):\n");
printf(" Extension \"%s\" %s on display \"%s\".\n",
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ext, reason, XDisplayString(d));
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#endif
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if (SDL_strcmp(reason, "missing") == 0) {
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/*
* Since the query itself, elsewhere, can handle a missing extension
* and the default behaviour in Xlib is to write to stderr, which
* generates unnecessary bug reports, we just ignore these.
*/
return 0;
}
/* Everything else goes to the default handler... */
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return Xext_handler(d, ext, reason);
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}
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/* Find out what class name we should use */
static char *get_classname(char *classname, int maxlen)
{
char *spot;
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#if defined(__LINUX__) || defined(__FREEBSD__)
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char procfile[1024];
char linkfile[1024];
int linksize;
#endif
/* 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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SDL_strlcpy(classname, spot, maxlen);
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return classname;
}
/* Next look at the application's executable name */
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#if defined(__LINUX__) || defined(__FREEBSD__)
#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", getpid());
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#else
#error Where can we find the executable name?
#endif
linksize = readlink(procfile, linkfile, sizeof(linkfile)-1);
if ( linksize > 0 ) {
linkfile[linksize] = '\0';
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spot = SDL_strrchr(linkfile, '/');
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if ( spot ) {
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SDL_strlcpy(classname, spot+1, maxlen);
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} else {
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SDL_strlcpy(classname, linkfile, maxlen);
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}
return classname;
}
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#endif /* __LINUX__ */
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/* Finally use the default we've used forever */
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SDL_strlcpy(classname, "SDL_App", maxlen);
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return classname;
}
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/* Create auxiliary (toplevel) windows with the current visual */
static void create_aux_windows(_THIS)
{
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int x = 0, y = 0;
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char classname[1024];
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XSetWindowAttributes xattr;
XWMHints *hints;
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unsigned long app_event_mask;
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int def_vis = (SDL_Visual == DefaultVisual(SDL_Display, SDL_Screen));
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/* Look up some useful Atoms */
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WM_DELETE_WINDOW = XInternAtom(SDL_Display, "WM_DELETE_WINDOW", False);
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/* Don't create any extra windows if we are being managed */
if ( SDL_windowid ) {
FSwindow = 0;
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WMwindow = SDL_strtol(SDL_windowid, NULL, 0);
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return;
}
if(FSwindow)
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XDestroyWindow(SDL_Display, FSwindow);
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#if SDL_VIDEO_DRIVER_X11_XINERAMA
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if ( use_xinerama ) {
x = xinerama_info.x_org;
y = xinerama_info.y_org;
}
#endif
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xattr.override_redirect = True;
xattr.background_pixel = def_vis ? BlackPixel(SDL_Display, SDL_Screen) : 0;
xattr.border_pixel = 0;
xattr.colormap = SDL_XColorMap;
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FSwindow = XCreateWindow(SDL_Display, SDL_Root,
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x, y, 32, 32, 0,
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this->hidden->depth, InputOutput, SDL_Visual,
CWOverrideRedirect | CWBackPixel | CWBorderPixel
| CWColormap,
&xattr);
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XSelectInput(SDL_Display, FSwindow, StructureNotifyMask);
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/* Tell KDE to keep the fullscreen window on top */
{
XEvent ev;
long mask;
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SDL_memset(&ev, 0, sizeof(ev));
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ev.xclient.type = ClientMessage;
ev.xclient.window = SDL_Root;
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ev.xclient.message_type = XInternAtom(SDL_Display,
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"KWM_KEEP_ON_TOP", False);
ev.xclient.format = 32;
ev.xclient.data.l[0] = FSwindow;
ev.xclient.data.l[1] = CurrentTime;
mask = SubstructureRedirectMask;
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XSendEvent(SDL_Display, SDL_Root, False, mask, &ev);
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}
hints = NULL;
if(WMwindow) {
/* All window attributes must survive the recreation */
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hints = XGetWMHints(SDL_Display, WMwindow);
XDestroyWindow(SDL_Display, WMwindow);
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}
/* Create the window for windowed management */
/* (reusing the xattr structure above) */
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WMwindow = XCreateWindow(SDL_Display, SDL_Root,
x, y, 32, 32, 0,
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this->hidden->depth, InputOutput, SDL_Visual,
CWBackPixel | CWBorderPixel | CWColormap,
&xattr);
/* Set the input hints so we get keyboard input */
if(!hints) {
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hints = XAllocWMHints();
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hints->input = True;
hints->flags = InputHint;
}
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XSetWMHints(SDL_Display, WMwindow, hints);
XFree(hints);
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X11_SetCaptionNoLock(this, this->wm_title, this->wm_icon);
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app_event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask
| PropertyChangeMask | StructureNotifyMask | KeymapStateMask;
XSelectInput(SDL_Display, WMwindow, app_event_mask);
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/* Set the class hints so we can get an icon (AfterStep) */
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get_classname(classname, sizeof(classname));
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{
XClassHint *classhints;
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classhints = XAllocClassHint();
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if(classhints != NULL) {
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classhints->res_name = classname;
classhints->res_class = classname;
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XSetClassHint(SDL_Display, WMwindow, classhints);
XFree(classhints);
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}
}
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/* Setup the communication with the IM server */
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/* create_aux_windows may be called several times against the same
Display. We should reuse the SDL_IM if one has been opened for
the Display, so we should not simply reset SDL_IM here. */
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#ifdef X_HAVE_UTF8_STRING
if (SDL_X11_HAVE_UTF8) {
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/* Discard obsolete resources if any. */
if (SDL_IM != NULL && SDL_Display != XDisplayOfIM(SDL_IM)) {
/* Just a double check. I don't think this
code is ever executed. */
SDL_SetError("display has changed while an IM is kept");
if (SDL_IC) {
XUnsetICFocus(SDL_IC);
XDestroyIC(SDL_IC);
SDL_IC = NULL;
}
XCloseIM(SDL_IM);
SDL_IM = NULL;
}
/* Open an input method. */
if (SDL_IM == NULL) {
char *old_locale, *old_modifiers;
/* I'm not comfortable to do locale setup
here. However, we need C library locale
(and xlib modifiers) to be set based on the
user's preference to use XIM, and many
existing game programs doesn't take care of
users' locale preferences, so someone other
than the game program should do it.
Moreover, ones say that some game programs
heavily rely on the C locale behaviour,
e.g., strcol()'s, and we can't change the C
library locale. Given the situation, I
couldn't find better place to do the
job... */
/* Save the current (application program's)
locale settings. */
old_locale = setlocale(LC_ALL, NULL);
old_modifiers = XSetLocaleModifiers(NULL);
if (old_locale == NULL || old_modifiers == NULL) {
/* The specs guarantee that the query
calls to above functions never
fail, so we should never come
here. */
SDL_SetError("failed to retreive current locale settings");
old_locale = NULL;
old_modifiers = NULL;
} else {
/* Save retreived values in our own
storage, since they may be
overwritten by the successive calls
to
setlocale/XSetLocaleModifiers. */
char const *p;
p = old_locale;
old_locale = SDL_malloc(strlen(p) + 1);
strcpy(old_locale, p);
p = old_modifiers;
old_modifiers = SDL_malloc(strlen(p) + 1);
strcpy(old_modifiers, p);
}
/* Fetch the user's preferences and open the
input method with them. */
setlocale(LC_ALL, "");
XSetLocaleModifiers("");
SDL_IM = XOpenIM(SDL_Display, NULL, classname, classname);
/* Restore the application's locale settings
so that we don't break the application's
expected behaviour. */
if (old_locale != NULL && old_modifiers != NULL) {
/* We need to restore the C library
locale first, since the
interpretation of the X modifier
may depend on it. */
setlocale(LC_ALL, old_locale);
SDL_free(old_locale);
XSetLocaleModifiers(old_modifiers);
SDL_free(old_modifiers);
}
}
/* Create a new input context for the new window just created. */
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SDL_IM = XOpenIM(SDL_Display, NULL, classname, classname);
if (SDL_IM == NULL) {
SDL_SetError("no input method could be opened");
} else {
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if (SDL_IC != NULL) {
/* Discard the old IC before creating new one. */
XUnsetICFocus(SDL_IC);
XDestroyIC(SDL_IC);
}
/* Theoretically we should check the current IM supports
PreeditNothing+StatusNothing style (i.e., root window method)
before creating the IC. However, it is the bottom line method,
and we supports any other options. If the IM didn't support
root window method, the following call fails, and SDL falls
back to pre-XIM keyboard handling. */
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SDL_IC = pXCreateIC(SDL_IM,
XNClientWindow, WMwindow,
XNFocusWindow, WMwindow,
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XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
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XNResourceName, classname,
XNResourceClass, classname,
NULL);
if (SDL_IC == NULL) {
SDL_SetError("no input context could be created");
XCloseIM(SDL_IM);
SDL_IM = NULL;
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} else {
/* We need to receive X events that an IM wants and to pass
them to the IM through XFilterEvent. The set of events may
vary depending on the IM implementation and the options
specified through various routes. Although unlikely, the
xlib specification allows IM to change the event requirement
with its own circumstances, it is safe to call SelectInput
whenever we re-create an IC. */
unsigned long mask = 0;
char *ret = pXGetICValues(SDL_IC, XNFilterEvents, &mask, NULL);
&ic_event_mask, NULL);
XSelectInput(SDL_Display, WMwindow, app_event_mask | mask);
XSetICFocus(SDL_IC);
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}
}
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}
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#endif
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/* Allow the window to be deleted by the window manager */
XSetWMProtocols(SDL_Display, WMwindow, &WM_DELETE_WINDOW, 1);
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}
static int X11_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
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const char *env = NULL;
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char *display;
int i;
/* Open the X11 display */
display = NULL; /* Get it from DISPLAY environment variable */
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if ( (SDL_strncmp(XDisplayName(display), ":", 1) == 0) ||
(SDL_strncmp(XDisplayName(display), "unix:", 5) == 0) ) {
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local_X11 = 1;
} else {
local_X11 = 0;
}
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SDL_Display = 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.
* 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 ( SDL_Display == NULL ) {
SDL_Delay(1000);
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SDL_Display = XOpenDisplay(display);
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}
#endif
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if ( SDL_Display == NULL ) {
SDL_SetError("Couldn't open X11 display");
return(-1);
}
#ifdef X11_DEBUG
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XSynchronize(SDL_Display, True);
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#endif
/* Create an alternate X display for graphics updates -- allows us
to do graphics updates in a separate thread from event handling.
Thread-safe X11 doesn't seem to exist.
*/
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GFX_Display = XOpenDisplay(display);
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if ( GFX_Display == NULL ) {
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XCloseDisplay(SDL_Display);
SDL_Display = NULL;
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SDL_SetError("Couldn't open X11 display");
return(-1);
}
/* Set the normal X error handler */
605
X_handler = XSetErrorHandler(x_errhandler);
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/* Set the error handler if we lose the X display */
608
XIO_handler = XSetIOErrorHandler(xio_errhandler);
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/* Set the X extension error handler */
611
Xext_handler = XSetExtensionErrorHandler(xext_errhandler);
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616
617
/* use default screen (from $DISPLAY) */
SDL_Screen = DefaultScreen(SDL_Display);
#ifndef NO_SHARED_MEMORY
/* Check for MIT shared memory extension */
618
use_mitshm = 0;
619
if ( local_X11 ) {
620
use_mitshm = XShmQueryExtension(SDL_Display);
621
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623
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}
#endif /* NO_SHARED_MEMORY */
/* Get the available video modes */
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if(X11_GetVideoModes(this) < 0) {
XCloseDisplay(GFX_Display);
GFX_Display = NULL;
XCloseDisplay(SDL_Display);
SDL_Display = NULL;
630
return -1;
631
}
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/* Determine the current screen size */
this->info.current_w = DisplayWidth(SDL_Display, SDL_Screen);
this->info.current_h = DisplayHeight(SDL_Display, SDL_Screen);
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/* Determine the default screen depth:
Use the default visual (or at least one with the same depth) */
SDL_DisplayColormap = DefaultColormap(SDL_Display, SDL_Screen);
for(i = 0; i < this->hidden->nvisuals; i++)
if(this->hidden->visuals[i].depth == DefaultDepth(SDL_Display,
SDL_Screen))
break;
if(i == this->hidden->nvisuals) {
/* default visual was useless, take the deepest one instead */
i = 0;
}
SDL_Visual = this->hidden->visuals[i].visual;
if ( SDL_Visual == DefaultVisual(SDL_Display, SDL_Screen) ) {
SDL_XColorMap = SDL_DisplayColormap;
} else {
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SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,
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SDL_Visual, AllocNone);
}
this->hidden->depth = this->hidden->visuals[i].depth;
vformat->BitsPerPixel = this->hidden->visuals[i].bpp;
if ( vformat->BitsPerPixel > 8 ) {
vformat->Rmask = SDL_Visual->red_mask;
vformat->Gmask = SDL_Visual->green_mask;
vformat->Bmask = SDL_Visual->blue_mask;
}
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if ( this->hidden->depth == 32 ) {
vformat->Amask = (0xFFFFFFFF & ~(vformat->Rmask|vformat->Gmask|vformat->Bmask));
}
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X11_SaveVidModeGamma(this);
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/* Save DPMS and screensaver settings */
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X11_SaveScreenSaver(SDL_Display, &screensaver_timeout, &dpms_enabled);
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X11_DisableScreenSaver(this, SDL_Display);
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/* See if we have been passed a window to use */
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SDL_windowid = SDL_getenv("SDL_WINDOWID");
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/* Create the fullscreen and managed windows */
create_aux_windows(this);
/* Create the blank cursor */
SDL_BlankCursor = this->CreateWMCursor(this, blank_cdata, blank_cmask,
BLANK_CWIDTH, BLANK_CHEIGHT,
BLANK_CHOTX, BLANK_CHOTY);
/* Fill in some window manager capabilities */
this->info.wm_available = 1;
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/* Allow environment override of screensaver disable. */
env = SDL_getenv("SDL_VIDEO_ALLOW_SCREENSAVER");
this->hidden->allow_screensaver = ( (env && SDL_atoi(env)) ? 1 : 0 );
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/* We're done! */
690
XFlush(SDL_Display);
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return(0);
}
static void X11_DestroyWindow(_THIS, SDL_Surface *screen)
{
/* Clean up OpenGL */
if ( screen ) {
screen->flags &= ~(SDL_OPENGL|SDL_OPENGLBLIT);
}
X11_GL_Shutdown(this);
if ( ! SDL_windowid ) {
/* Hide the managed window */
if ( WMwindow ) {
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XUnmapWindow(SDL_Display, WMwindow);
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}
if ( screen && (screen->flags & SDL_FULLSCREEN) ) {
screen->flags &= ~SDL_FULLSCREEN;
X11_LeaveFullScreen(this);
}
/* Destroy the output window */
if ( SDL_Window ) {
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XDestroyWindow(SDL_Display, SDL_Window);
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723
}
/* Free the colormap entries */
if ( SDL_XPixels ) {
int numcolors;
unsigned long pixel;
numcolors = SDL_Visual->map_entries;
for ( pixel=0; pixel<numcolors; ++pixel ) {
while ( SDL_XPixels[pixel] > 0 ) {
724
XFreeColors(GFX_Display,
725
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727
728
SDL_DisplayColormap,&pixel,1,0);
--SDL_XPixels[pixel];
}
}
729
SDL_free(SDL_XPixels);
730
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734
SDL_XPixels = NULL;
}
/* Free the graphics context */
if ( SDL_GC ) {
735
XFreeGC(SDL_Display, SDL_GC);
736
737
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739
740
SDL_GC = 0;
}
}
}
741
742
static SDL_bool X11_WindowPosition(_THIS, int *x, int *y, int w, int h)
{
743
744
const char *window = SDL_getenv("SDL_VIDEO_WINDOW_POS");
const char *center = SDL_getenv("SDL_VIDEO_CENTERED");
745
if ( window ) {
746
if ( SDL_sscanf(window, "%d,%d", x, y) == 2 ) {
747
748
return SDL_TRUE;
}
749
if ( SDL_strcmp(window, "center") == 0 ) {
750
751
752
753
754
755
756
757
758
759
760
center = window;
}
}
if ( center ) {
*x = (DisplayWidth(SDL_Display, SDL_Screen) - w)/2;
*y = (DisplayHeight(SDL_Display, SDL_Screen) - h)/2;
return SDL_TRUE;
}
return SDL_FALSE;
}
761
762
763
764
static void X11_SetSizeHints(_THIS, int w, int h, Uint32 flags)
{
XSizeHints *hints;
765
hints = XAllocSizeHints();
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
if ( hints ) {
if ( flags & SDL_RESIZABLE ) {
hints->min_width = 32;
hints->min_height = 32;
hints->max_height = 4096;
hints->max_width = 4096;
} else {
hints->min_width = hints->max_width = w;
hints->min_height = hints->max_height = h;
}
hints->flags = PMaxSize | PMinSize;
if ( flags & SDL_FULLSCREEN ) {
hints->x = 0;
hints->y = 0;
hints->flags |= USPosition;
} else
/* Center it, if desired */
783
if ( X11_WindowPosition(this, &hints->x, &hints->y, w, h) ) {
784
hints->flags |= USPosition;
785
XMoveWindow(SDL_Display, WMwindow, hints->x, hints->y);
786
787
/* Flush the resize event so we don't catch it later */
788
XSync(SDL_Display, True);
789
}
790
791
XSetWMNormalHints(SDL_Display, WMwindow, hints);
XFree(hints);
792
793
794
795
796
797
798
799
800
801
802
}
/* Respect the window caption style */
if ( flags & SDL_NOFRAME ) {
SDL_bool set;
Atom WM_HINTS;
/* We haven't modified the window manager hints yet */
set = SDL_FALSE;
/* First try to set MWM hints */
803
WM_HINTS = XInternAtom(SDL_Display, "_MOTIF_WM_HINTS", True);
804
805
806
807
808
809
810
811
812
813
if ( WM_HINTS != None ) {
/* Hints used by Motif compliant window managers */
struct {
unsigned long flags;
unsigned long functions;
unsigned long decorations;
long input_mode;
unsigned long status;
} MWMHints = { (1L << 1), 0, 0, 0, 0 };
814
XChangeProperty(SDL_Display, WMwindow,
815
816
817
818
819
820
821
WM_HINTS, WM_HINTS, 32,
PropModeReplace,
(unsigned char *)&MWMHints,
sizeof(MWMHints)/sizeof(long));
set = SDL_TRUE;
}
/* Now try to set KWM hints */
822
WM_HINTS = XInternAtom(SDL_Display, "KWM_WIN_DECORATION", True);
823
824
825
if ( WM_HINTS != None ) {
long KWMHints = 0;
826
XChangeProperty(SDL_Display, WMwindow,
827
828
829
830
831
832
833
WM_HINTS, WM_HINTS, 32,
PropModeReplace,
(unsigned char *)&KWMHints,
sizeof(KWMHints)/sizeof(long));
set = SDL_TRUE;
}
/* Now try to set GNOME hints */
834
WM_HINTS = XInternAtom(SDL_Display, "_WIN_HINTS", True);
835
836
837
if ( WM_HINTS != None ) {
long GNOMEHints = 0;
838
XChangeProperty(SDL_Display, WMwindow,
839
840
841
842
843
844
845
846
WM_HINTS, WM_HINTS, 32,
PropModeReplace,
(unsigned char *)&GNOMEHints,
sizeof(GNOMEHints)/sizeof(long));
set = SDL_TRUE;
}
/* Finally set the transient hints if necessary */
if ( ! set ) {
847
XSetTransientForHint(SDL_Display, WMwindow, SDL_Root);
848
849
850
851
852
853
854
855
856
}
} else {
SDL_bool set;
Atom WM_HINTS;
/* We haven't modified the window manager hints yet */
set = SDL_FALSE;
/* First try to unset MWM hints */
857
WM_HINTS = XInternAtom(SDL_Display, "_MOTIF_WM_HINTS", True);
858
if ( WM_HINTS != None ) {
859
XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);
860
861
862
set = SDL_TRUE;
}
/* Now try to unset KWM hints */
863
WM_HINTS = XInternAtom(SDL_Display, "KWM_WIN_DECORATION", True);
864
if ( WM_HINTS != None ) {
865
XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);
866
867
868
set = SDL_TRUE;
}
/* Now try to unset GNOME hints */
869
WM_HINTS = XInternAtom(SDL_Display, "_WIN_HINTS", True);
870
if ( WM_HINTS != None ) {
871
XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);
872
873
874
875
876
set = SDL_TRUE;
}
/* Finally unset the transient hints if necessary */
if ( ! set ) {
/* NOTE: Does this work? */
877
XSetTransientForHint(SDL_Display, WMwindow, None);
878
879
880
881
882
883
884
885
886
887
}
}
}
static int X11_CreateWindow(_THIS, SDL_Surface *screen,
int w, int h, int bpp, Uint32 flags)
{
int i, depth;
Visual *vis;
int vis_change;
888
Uint32 Amask;
889
890
891
892
/* If a window is already present, destroy it and start fresh */
if ( SDL_Window ) {
X11_DestroyWindow(this, screen);
893
switch_waiting = 0; /* Prevent jump back to now-meaningless state. */
894
895
896
897
}
/* See if we have been given a window id */
if ( SDL_windowid ) {
898
SDL_Window = SDL_strtol(SDL_windowid, NULL, 0);
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
} else {
SDL_Window = 0;
}
/* find out which visual we are going to use */
if ( flags & SDL_OPENGL ) {
XVisualInfo *vi;
vi = X11_GL_GetVisual(this);
if( !vi ) {
return -1;
}
vis = vi->visual;
depth = vi->depth;
} else if ( SDL_windowid ) {
XWindowAttributes a;
916
XGetWindowAttributes(SDL_Display, SDL_Window, &a);
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
vis = a.visual;
depth = a.depth;
} else {
for ( i = 0; i < this->hidden->nvisuals; i++ ) {
if ( this->hidden->visuals[i].bpp == bpp )
break;
}
if ( i == this->hidden->nvisuals ) {
SDL_SetError("No matching visual for requested depth");
return -1; /* should never happen */
}
vis = this->hidden->visuals[i].visual;
depth = this->hidden->visuals[i].depth;
}
#ifdef X11_DEBUG
printf("Choosing %s visual at %d bpp - %d colormap entries\n", vis->class == PseudoColor ? "PseudoColor" : (vis->class == TrueColor ? "TrueColor" : (vis->class == DirectColor ? "DirectColor" : "Unknown")), depth, vis->map_entries);
#endif
vis_change = (vis != SDL_Visual);
SDL_Visual = vis;
this->hidden->depth = depth;
/* Allocate the new pixel format for this video mode */
939
940
941
942
943
if ( this->hidden->depth == 32 ) {
Amask = (0xFFFFFFFF & ~(vis->red_mask|vis->green_mask|vis->blue_mask));
} else {
Amask = 0;
}
944
if ( ! SDL_ReallocFormat(screen, bpp,
945
vis->red_mask, vis->green_mask, vis->blue_mask, Amask) ) {
946
return -1;
948
949
950
/* Create the appropriate colormap */
if ( SDL_XColorMap != SDL_DisplayColormap ) {
951
XFreeColormap(SDL_Display, SDL_XColorMap);
952
953
954
955
956
957
}
if ( SDL_Visual->class == PseudoColor ) {
int ncolors;
/* Allocate the pixel flags */
ncolors = SDL_Visual->map_entries;
958
SDL_XPixels = SDL_malloc(ncolors * sizeof(int));
959
960
961
962
if(SDL_XPixels == NULL) {
SDL_OutOfMemory();
return -1;
}
963
SDL_memset(SDL_XPixels, 0, ncolors * sizeof(*SDL_XPixels));
964
965
966
967
968
969
970
/* always allocate a private colormap on non-default visuals */
if ( SDL_Visual != DefaultVisual(SDL_Display, SDL_Screen) ) {
flags |= SDL_HWPALETTE;
}
if ( flags & SDL_HWPALETTE ) {
screen->flags |= SDL_HWPALETTE;
971
SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,
972
973
974
975
976
977
978
SDL_Visual, AllocAll);
} else {
SDL_XColorMap = SDL_DisplayColormap;
}
} else if ( SDL_Visual->class == DirectColor ) {
/* Create a colormap which we can manipulate for gamma */
979
SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,
980
SDL_Visual, AllocAll);
981
XSync(SDL_Display, False);
982
983
984
985
986
987
988
989
/* Initialize the colormap to the identity mapping */
SDL_GetGammaRamp(0, 0, 0);
this->screen = screen;
X11_SetGammaRamp(this, this->gamma);
this->screen = NULL;
} else {
/* Create a read-only colormap for our window */
990
SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,
991
992
993
994
995
996
997
998
999
1000
SDL_Visual, AllocNone);
}
/* Recreate the auxiliary windows, if needed (required for GL) */
if ( vis_change )
create_aux_windows(this);
if(screen->flags & SDL_HWPALETTE) {
/* Since the full-screen window might have got a nonzero background
colour (0 is white on some displays), we should reset the