SDL_x11wm.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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*/
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include "SDL_version.h"
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#include "SDL_stdlib.h"
#include "SDL_string.h"
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#include "SDL_error.h"
#include "SDL_timer.h"
#include "SDL_video.h"
#include "SDL_syswm.h"
#include "SDL_events_c.h"
#include "SDL_pixels_c.h"
#include "SDL_x11modes_c.h"
#include "SDL_x11wm_c.h"
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static Uint8 reverse_byte(Uint8 x)
{
x = (x & 0xaa) >> 1 | (x & 0x55) << 1;
x = (x & 0xcc) >> 2 | (x & 0x33) << 2;
x = (x & 0xf0) >> 4 | (x & 0x0f) << 4;
return x;
}
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void X11_SetIcon(_THIS, SDL_Surface *icon, Uint8 *mask)
{
SDL_Surface *sicon;
XWMHints *wmhints;
XImage *icon_image;
Pixmap icon_pixmap;
Pixmap mask_pixmap;
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Window icon_window = None;
GC gc;
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XGCValues GCvalues;
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int i, dbpp;
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SDL_Rect bounds;
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Uint8 *LSBmask;
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Visual *dvis;
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char *p;
int masksize;
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SDL_Lock_EventThread();
/* The icon must use the default visual, depth and colormap of the
screen, so it might need a conversion */
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dvis = DefaultVisual(SDL_Display, SDL_Screen);
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dbpp = DefaultDepth(SDL_Display, SDL_Screen);
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for(i = 0; i < this->hidden->nvisuals; i++) {
if(this->hidden->visuals[i].visual == dvis) {
dbpp = this->hidden->visuals[i].bpp;
break;
}
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}
/* The Visual struct is supposed to be opaque but we cheat a little */
sicon = SDL_CreateRGBSurface(SDL_SWSURFACE, icon->w, icon->h,
dbpp,
dvis->red_mask, dvis->green_mask,
dvis->blue_mask, 0);
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if ( sicon == NULL )
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goto done;
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if(dbpp == 8) {
/* Default visual is 8bit; we need to allocate colours from
the default colormap */
SDL_Color want[256], got[256];
int nwant;
Colormap dcmap;
int missing;
dcmap = DefaultColormap(SDL_Display, SDL_Screen);
if(icon->format->palette) {
/* The icon has a palette as well - we just have to
find those colours */
nwant = icon->format->palette->ncolors;
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SDL_memcpy(want, icon->format->palette->colors,
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nwant * sizeof want[0]);
} else {
/* try the standard 6x6x6 cube for lack of better
ideas */
int r, g, b, i;
for(r = i = 0; r < 256; r += 0x33)
for(g = 0; g < 256; g += 0x33)
for(b = 0; b < 256; b += 0x33, i++) {
want[i].r = r;
want[i].g = g;
want[i].b = b;
}
nwant = 216;
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}
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if(SDL_iconcolors) {
/* free already allocated colours first */
unsigned long freelist[512];
int nfree = 0;
for(i = 0; i < 256; i++) {
while(SDL_iconcolors[i]) {
freelist[nfree++] = i;
SDL_iconcolors[i]--;
}
}
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pXFreeColors(GFX_Display, dcmap, freelist, nfree, 0);
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}
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if(!SDL_iconcolors)
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SDL_iconcolors = SDL_malloc(256 * sizeof *SDL_iconcolors);
SDL_memset(SDL_iconcolors, 0, 256 * sizeof *SDL_iconcolors);
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/* try to allocate the colours */
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SDL_memset(got, 0, sizeof got);
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missing = 0;
for(i = 0; i < nwant; i++) {
XColor c;
c.red = want[i].r << 8;
c.green = want[i].g << 8;
c.blue = want[i].b << 8;
c.flags = DoRed | DoGreen | DoBlue;
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if(pXAllocColor(GFX_Display, dcmap, &c)) {
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/* got the colour */
SDL_iconcolors[c.pixel]++;
got[c.pixel] = want[i];
} else {
missing = 1;
}
}
if(missing) {
/* Some colours were apparently missing, so we just
allocate all the rest as well */
XColor cols[256];
for(i = 0; i < 256; i++)
cols[i].pixel = i;
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pXQueryColors(GFX_Display, dcmap, cols, 256);
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for(i = 0; i < 256; i++) {
got[i].r = cols[i].red >> 8;
got[i].g = cols[i].green >> 8;
got[i].b = cols[i].blue >> 8;
if(!SDL_iconcolors[i]) {
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if(pXAllocColor(GFX_Display, dcmap,
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cols + i)) {
SDL_iconcolors[i] = 1;
} else {
/* index not available */
got[i].r = 0;
got[i].g = 0;
got[i].b = 0;
}
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}
}
}
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SDL_SetColors(sicon, got, 0, 256);
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}
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bounds.x = 0;
bounds.y = 0;
bounds.w = icon->w;
bounds.h = icon->h;
if ( SDL_LowerBlit(icon, &bounds, sicon, &bounds) < 0 )
goto done;
/* We need the mask as given, except in LSBfirst format instead of
MSBfirst. Reverse the bits in each byte. */
masksize = ((sicon->w + 7) >> 3) * sicon->h;
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LSBmask = SDL_malloc(masksize);
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if ( LSBmask == NULL ) {
goto done;
}
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SDL_memset(LSBmask, 0, masksize);
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for(i = 0; i < masksize; i++)
LSBmask[i] = reverse_byte(mask[i]);
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mask_pixmap = pXCreatePixmapFromBitmapData(SDL_Display, WMwindow,
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(char *)LSBmask,
sicon->w, sicon->h,
1L, 0L, 1);
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/* Transfer the image to an X11 pixmap */
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icon_image = pXCreateImage(SDL_Display,
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DefaultVisual(SDL_Display, SDL_Screen),
DefaultDepth(SDL_Display, SDL_Screen),
ZPixmap, 0, sicon->pixels,
sicon->w, sicon->h,
32, 0);
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icon_image->byte_order = (SDL_BYTEORDER == SDL_BIG_ENDIAN)
? MSBFirst : LSBFirst;
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icon_pixmap = pXCreatePixmap(SDL_Display, SDL_Root, sicon->w, sicon->h,
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DefaultDepth(SDL_Display, SDL_Screen));
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gc = pXCreateGC(SDL_Display, icon_pixmap, 0, &GCvalues);
pXPutImage(SDL_Display, icon_pixmap, gc, icon_image,
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0, 0, 0, 0, sicon->w, sicon->h);
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pXFreeGC(SDL_Display, gc);
pXDestroyImage(icon_image);
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SDL_free(LSBmask);
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sicon->pixels = NULL;
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/* Some buggy window managers (some versions of Enlightenment, it
seems) need an icon window *and* icon pixmap to work properly, while
it screws up others. The default is only to use a pixmap. */
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p = SDL_getenv("SDL_VIDEO_X11_ICONWIN");
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if(p && *p) {
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icon_window = pXCreateSimpleWindow(SDL_Display, SDL_Root,
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0, 0, sicon->w, sicon->h, 0,
CopyFromParent,
CopyFromParent);
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pXSetWindowBackgroundPixmap(SDL_Display, icon_window,
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icon_pixmap);
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pXClearWindow(SDL_Display, icon_window);
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/* Set the window icon to the icon pixmap (and icon window) */
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wmhints = pXAllocWMHints();
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wmhints->flags = (IconPixmapHint | IconMaskHint);
wmhints->icon_pixmap = icon_pixmap;
wmhints->icon_mask = mask_pixmap;
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if(icon_window != None) {
wmhints->flags |= IconWindowHint;
wmhints->icon_window = icon_window;
}
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pXSetWMHints(SDL_Display, WMwindow, wmhints);
pXFree(wmhints);
pXSync(SDL_Display, False);
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done:
SDL_Unlock_EventThread();
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SDL_FreeSurface(sicon);
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}
void X11_SetCaption(_THIS, const char *title, const char *icon)
{
XTextProperty titleprop, iconprop;
/* Lock the event thread, in multi-threading environments */
SDL_Lock_EventThread();
if ( title != NULL ) {
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int error = XLocaleNotSupported;
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#ifdef X_HAVE_UTF8_STRING
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error = pXutf8TextListToTextProperty(SDL_Display,
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(char **)&title, 1, XUTF8StringStyle,
&titleprop);
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if ( error != Success ) {
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pXStringListToTextProperty((char **)&title, 1,
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&titleprop);
}
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pXSetWMName(SDL_Display, WMwindow, &titleprop);
pXFree(titleprop.value);
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}
if ( icon != NULL ) {
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int error = XLocaleNotSupported;
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#ifdef X_HAVE_UTF8_STRING
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error = pXutf8TextListToTextProperty(SDL_Display,
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(char **)&icon, 1, XUTF8StringStyle, &iconprop);
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if ( error != Success ) {
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pXStringListToTextProperty((char **)&icon, 1, &iconprop);
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pXSetWMIconName(SDL_Display, WMwindow, &iconprop);
pXFree(iconprop.value);
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}
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pXSync(SDL_Display, False);
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SDL_Unlock_EventThread();
}
/* Iconify the window */
int X11_IconifyWindow(_THIS)
{
int result;
SDL_Lock_EventThread();
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result = pXIconifyWindow(SDL_Display, WMwindow, SDL_Screen);
pXSync(SDL_Display, False);
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SDL_Unlock_EventThread();
return(result);
}
SDL_GrabMode X11_GrabInputNoLock(_THIS, SDL_GrabMode mode)
{
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int result;
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if ( this->screen == NULL ) {
return(SDL_GRAB_OFF);
}
if ( ! SDL_Window ) {
return(mode); /* Will be set later on mode switch */
}
if ( mode == SDL_GRAB_OFF ) {
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pXUngrabPointer(SDL_Display, CurrentTime);
pXUngrabKeyboard(SDL_Display, CurrentTime);
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} else {
if ( this->screen->flags & SDL_FULLSCREEN ) {
/* Unbind the mouse from the fullscreen window */
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pXUngrabPointer(SDL_Display, CurrentTime);
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}
/* Try to grab the mouse */
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#if 0 /* We'll wait here until we actually grab, otherwise behavior undefined */
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for ( numtries = 0; numtries < 10; ++numtries ) {
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#else
while ( 1 ) {
#endif
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result = pXGrabPointer(SDL_Display, SDL_Window, True, 0,
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GrabModeAsync, GrabModeAsync,
SDL_Window, None, CurrentTime);
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if ( result == GrabSuccess ) {
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break;
}
SDL_Delay(100);
}
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if ( result != GrabSuccess ) {
/* Uh, oh, what do we do here? */ ;
}
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/* Now grab the keyboard */
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pXGrabKeyboard(SDL_Display, WMwindow, True,
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GrabModeAsync, GrabModeAsync, CurrentTime);
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/* Raise the window if we grab the mouse */
if ( !(this->screen->flags & SDL_FULLSCREEN) )
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pXRaiseWindow(SDL_Display, WMwindow);
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/* Make sure we register input focus */
SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);
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}
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pXSync(SDL_Display, False);
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return(mode);
}
SDL_GrabMode X11_GrabInput(_THIS, SDL_GrabMode mode)
{
SDL_Lock_EventThread();
mode = X11_GrabInputNoLock(this, mode);
SDL_Unlock_EventThread();
return(mode);
}
/* If 'info' is the right version, this function fills it and returns 1.
Otherwise, in case of a version mismatch, it returns -1.
*/
static void lock_display(void)
{
SDL_Lock_EventThread();
}
static void unlock_display(void)
{
/* Make sure any X11 transactions are completed */
SDL_VideoDevice *this = current_video;
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pXSync(SDL_Display, False);
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SDL_Unlock_EventThread();
}
int X11_GetWMInfo(_THIS, SDL_SysWMinfo *info)
{
if ( info->version.major <= SDL_MAJOR_VERSION ) {
info->subsystem = SDL_SYSWM_X11;
info->info.x11.display = SDL_Display;
info->info.x11.window = SDL_Window;
if ( SDL_VERSIONNUM(info->version.major,
info->version.minor,
info->version.patch) >= 1002 ) {
info->info.x11.fswindow = FSwindow;
info->info.x11.wmwindow = WMwindow;
}
info->info.x11.lock_func = lock_display;
info->info.x11.unlock_func = unlock_display;
return(1);
} else {
SDL_SetError("Application not compiled with SDL %d.%d\n",
SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
return(-1);
}
}