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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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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);
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 */
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X_handler = XSetErrorHandler(x_errhandler);
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/* Set the error handler if we lose the X display */
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XIO_handler = XSetIOErrorHandler(xio_errhandler);
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/* Set the X extension error handler */
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Xext_handler = XSetExtensionErrorHandler(xext_errhandler);
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/* use default screen (from $DISPLAY) */
SDL_Screen = DefaultScreen(SDL_Display);
#ifndef NO_SHARED_MEMORY
/* Check for MIT shared memory extension */
616
use_mitshm = 0;
617
if ( local_X11 ) {
618
use_mitshm = XShmQueryExtension(SDL_Display);
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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;
628
return -1;
629
}
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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! */
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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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}
/* 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 ) {
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XFreeColors(GFX_Display,
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SDL_DisplayColormap,&pixel,1,0);
--SDL_XPixels[pixel];
}
}
727
SDL_free(SDL_XPixels);
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SDL_XPixels = NULL;
}
/* Free the graphics context */
if ( SDL_GC ) {
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XFreeGC(SDL_Display, SDL_GC);
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SDL_GC = 0;
}
}
}
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static SDL_bool X11_WindowPosition(_THIS, int *x, int *y, int w, int h)
{
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const char *window = SDL_getenv("SDL_VIDEO_WINDOW_POS");
const char *center = SDL_getenv("SDL_VIDEO_CENTERED");
743
if ( window ) {
744
if ( SDL_sscanf(window, "%d,%d", x, y) == 2 ) {
745
746
return SDL_TRUE;
}
747
if ( SDL_strcmp(window, "center") == 0 ) {
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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;
}
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static void X11_SetSizeHints(_THIS, int w, int h, Uint32 flags)
{
XSizeHints *hints;
763
hints = XAllocSizeHints();
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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 */
781
if ( X11_WindowPosition(this, &hints->x, &hints->y, w, h) ) {
782
hints->flags |= USPosition;
783
XMoveWindow(SDL_Display, WMwindow, hints->x, hints->y);
784
785
/* Flush the resize event so we don't catch it later */
786
XSync(SDL_Display, True);
787
}
788
789
XSetWMNormalHints(SDL_Display, WMwindow, hints);
XFree(hints);
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}
/* 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 */
801
WM_HINTS = XInternAtom(SDL_Display, "_MOTIF_WM_HINTS", True);
802
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811
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 };
812
XChangeProperty(SDL_Display, WMwindow,
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WM_HINTS, WM_HINTS, 32,
PropModeReplace,
(unsigned char *)&MWMHints,
sizeof(MWMHints)/sizeof(long));
set = SDL_TRUE;
}
/* Now try to set KWM hints */
820
WM_HINTS = XInternAtom(SDL_Display, "KWM_WIN_DECORATION", True);
821
822
823
if ( WM_HINTS != None ) {
long KWMHints = 0;
824
XChangeProperty(SDL_Display, WMwindow,
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827
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831
WM_HINTS, WM_HINTS, 32,
PropModeReplace,
(unsigned char *)&KWMHints,
sizeof(KWMHints)/sizeof(long));
set = SDL_TRUE;
}
/* Now try to set GNOME hints */
832
WM_HINTS = XInternAtom(SDL_Display, "_WIN_HINTS", True);
833
834
835
if ( WM_HINTS != None ) {
long GNOMEHints = 0;
836
XChangeProperty(SDL_Display, WMwindow,
837
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839
840
841
842
843
844
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 ) {
845
XSetTransientForHint(SDL_Display, WMwindow, SDL_Root);
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847
848
849
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854
}
} 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 */
855
WM_HINTS = XInternAtom(SDL_Display, "_MOTIF_WM_HINTS", True);
856
if ( WM_HINTS != None ) {
857
XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);
858
859
860
set = SDL_TRUE;
}
/* Now try to unset KWM hints */
861
WM_HINTS = XInternAtom(SDL_Display, "KWM_WIN_DECORATION", True);
862
if ( WM_HINTS != None ) {
863
XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);
864
865
866
set = SDL_TRUE;
}
/* Now try to unset GNOME hints */
867
WM_HINTS = XInternAtom(SDL_Display, "_WIN_HINTS", True);
868
if ( WM_HINTS != None ) {
869
XDeleteProperty(SDL_Display, WMwindow, WM_HINTS);
870
871
872
873
874
set = SDL_TRUE;
}
/* Finally unset the transient hints if necessary */
if ( ! set ) {
/* NOTE: Does this work? */
875
XSetTransientForHint(SDL_Display, WMwindow, None);
876
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878
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880
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885
}
}
}
static int X11_CreateWindow(_THIS, SDL_Surface *screen,
int w, int h, int bpp, Uint32 flags)
{
int i, depth;
Visual *vis;
int vis_change;
886
Uint32 Amask;
887
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889
890
/* If a window is already present, destroy it and start fresh */
if ( SDL_Window ) {
X11_DestroyWindow(this, screen);
891
switch_waiting = 0; /* Prevent jump back to now-meaningless state. */
892
893
894
895
}
/* See if we have been given a window id */
if ( SDL_windowid ) {
896
SDL_Window = SDL_strtol(SDL_windowid, NULL, 0);
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
} 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;
914
XGetWindowAttributes(SDL_Display, SDL_Window, &a);
915
916
917
918
919
920
921
922
923
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926
927
928
929
930
931
932
933
934
935
936
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 */
937
938
939
940
941
if ( this->hidden->depth == 32 ) {
Amask = (0xFFFFFFFF & ~(vis->red_mask|vis->green_mask|vis->blue_mask));
} else {
Amask = 0;
}
942
if ( ! SDL_ReallocFormat(screen, bpp,
943
vis->red_mask, vis->green_mask, vis->blue_mask, Amask) ) {
944
return -1;
946
947
948
/* Create the appropriate colormap */
if ( SDL_XColorMap != SDL_DisplayColormap ) {
949
XFreeColormap(SDL_Display, SDL_XColorMap);
950
951
952
953
954
955
}
if ( SDL_Visual->class == PseudoColor ) {
int ncolors;
/* Allocate the pixel flags */
ncolors = SDL_Visual->map_entries;
956
SDL_XPixels = SDL_malloc(ncolors * sizeof(int));
957
958
959
960
if(SDL_XPixels == NULL) {
SDL_OutOfMemory();
return -1;
}
961
SDL_memset(SDL_XPixels, 0, ncolors * sizeof(*SDL_XPixels));
962
963
964
965
966
967
968
/* 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;
969
SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,
970
971
972
973
974
975
976
SDL_Visual, AllocAll);
} else {
SDL_XColorMap = SDL_DisplayColormap;
}
} else if ( SDL_Visual->class == DirectColor ) {
/* Create a colormap which we can manipulate for gamma */
977
SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,
978
SDL_Visual, AllocAll);
979
XSync(SDL_Display, False);
980
981
982
983
984
985
986
987
/* 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 */
988
SDL_XColorMap = XCreateColormap(SDL_Display, SDL_Root,
989
990
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
background to 0 here since that is what the user expects
with a private colormap */