diff options
| -rw-r--r-- | src/Makefile.am | 1 | ||||
| -rw-r--r-- | src/Xge.c | 360 | ||||
| -rw-r--r-- | src/extutil.c | 9 |
3 files changed, 370 insertions, 0 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index bfd3740..f9ef744 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -20,6 +20,7 @@ libXext_la_SOURCES = \ XTestExt1.c \ Xcup.c \ Xdbe.c \ + Xge.c \ extutil.c \ globals.c diff --git a/src/Xge.c b/src/Xge.c new file mode 100644 index 0000000..ef096b6 --- /dev/null +++ b/src/Xge.c @@ -0,0 +1,360 @@ +/* + * Copyright © 2007 Peter Hutterer + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of the author not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. The author makes no + * representations about the suitability of this software for any purpose. It + * is provided "as is" without express or implied warranty. + * + * THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * XGE is an extension to re-use a single opcode for multiple events, + * depending on the extension. XGE allows events >32 bytes. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#define NEED_EVENTS +#define NEED_REPLIES + +#include <stdio.h> +#include <X11/extensions/geproto.h> +#include <X11/extensions/ge.h> +#include <X11/Xlibint.h> +#include <X11/extensions/XInput.h> +#include <X11/extensions/extutil.h> +#include <X11/extensions/Xge.h> + +/***********************************************************************/ +/* internal data structures */ +/***********************************************************************/ + +/* NULL terminated list of registered extensions. */ +typedef struct _XGEExtNode { + int extension; + XExtensionHooks* hooks; + struct _XGEExtNode* next; +} XGEExtNode, *XGEExtList; + +/* Internal data for GE extension */ +typedef struct _XGEData { + XEvent data; + XExtensionVersion *vers; + XGEExtList extensions; +} XGEData; + +/* forward declarations */ +extern XExtDisplayInfo* _xgeFindDisplay(Display*); +static Bool _xgeWireToEvent(Display*, XEvent*, xEvent*); +Status _xgeEventToWire(Display*, XEvent*, xEvent*); +static int _xgeDpyClose(Display*, XExtCodes*); +static XExtensionVersion* _xgeGetExtensionVersion(Display*, + _Xconst char*, + XExtDisplayInfo*); +static Bool _xgeCheckExtension(Display* dpy, XExtDisplayInfo* info); + +/* main extension information data */ +static XExtensionInfo *xge_info; +static char xge_extension_name[] = GE_NAME; +static XExtensionHooks xge_extension_hooks = { + NULL, /* create_gc */ + NULL, /* copy_gc */ + NULL, /* flush_gc */ + NULL, /* free_gc */ + NULL, /* create_font */ + NULL, /* free_font */ + _xgeDpyClose, /* close_display */ + _xgeWireToEvent, /* wire_to_event */ + _xgeEventToWire, /* event_to_wire */ + NULL, /* error */ + NULL, /* error_string */ +}; + + +XExtDisplayInfo *_xgeFindDisplay(Display *dpy) +{ + XExtDisplayInfo *dpyinfo; + if (!xge_info) + { + if (!(xge_info = XextCreateExtension())) + return NULL; + } + if (!(dpyinfo = XextFindDisplay (xge_info, dpy))) + { + dpyinfo = XextAddDisplay (xge_info, + dpy, + xge_extension_name, + &xge_extension_hooks, + 0 /* no events, see below */, + NULL); + /* We don't use an extension opcode, so we have to set the handlers + * directly. If GenericEvent would be > 64, the job would be done by + * XExtAddDisplay */ + XESetWireToEvent (dpy, + GenericEvent, + xge_extension_hooks.wire_to_event); + XESetEventToWire (dpy, + GenericEvent, + xge_extension_hooks.event_to_wire); + } + return dpyinfo; +} + +/* + * Check extension is set up and internal data fields are filled. + */ +Bool +_xgeCheckExtInit(Display* dpy, XExtDisplayInfo* info) +{ + LockDisplay(dpy); + if(!_xgeCheckExtension(dpy, info)) + { + goto cleanup; + } + + if (!info->data) + { + XGEData* data = (XGEData*)Xmalloc(sizeof(XGEData)); + if (!data) { + goto cleanup; + } + /* get version from server */ + data->vers = + _xgeGetExtensionVersion(dpy, "Generic Event Extension", info); + data->extensions = NULL; + info->data = (XPointer)data; + } + + UnlockDisplay(dpy); + return True; + +cleanup: + UnlockDisplay(dpy); + return False; +} + +/* Return 1 if XGE extension exists, 0 otherwise. */ +static Bool +_xgeCheckExtension(Display* dpy, XExtDisplayInfo* info) +{ + XextCheckExtension(dpy, info, xge_extension_name, False); + return True; +} + + +/* Retrieve XGE version number from server. */ +static XExtensionVersion* +_xgeGetExtensionVersion(Display* dpy, + _Xconst char* name, + XExtDisplayInfo*info) +{ + xGEQueryVersionReply rep; + xGEQueryVersionReq *req; + XExtensionVersion *vers; + + GetReq(GEQueryVersion, req); + req->reqType = info->codes->major_opcode; + req->ReqType = X_GEQueryVersion; + req->majorVersion = GE_MAJOR; + req->minorVersion = GE_MINOR; + + if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) + { + Xfree(info); + return NULL; + } + + vers = (XExtensionVersion*)Xmalloc(sizeof(XExtensionVersion)); + vers->major_version = rep.majorVersion; + vers->minor_version = rep.minorVersion; + return vers; +} + +/* + * Display closing routine. + */ + +static int +_xgeDpyClose(Display* dpy, XExtCodes* codes) +{ + XExtDisplayInfo *info = _xgeFindDisplay(dpy); + + if (info->data != NULL) { + XGEData* xge_data = (XGEData*)info->data; + + if (xge_data->extensions) + { + XGEExtList current, next; + current = xge_data->extensions; + while(current) + { + next = current->next; + Xfree(current); + current = next; + } + } + + XFree(xge_data->vers); + XFree(xge_data); + } + + return XextRemoveDisplay(xge_info, dpy); +} + +/* + * protocol to Xlib event conversion routine. + */ +static Bool +_xgeWireToEvent(Display* dpy, XEvent* re, xEvent *event) +{ + int extension; + XGEExtList it; + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!info) + return False; + /* + _xgeCheckExtInit() calls LockDisplay, leading to a SIGABRT. + Well, I guess we don't need the data we get in CheckExtInit anyway + if (!_xgeCheckExtInit(dpy, info)) + return False; + */ + + extension = ((xGenericEvent*)event)->extension; + + it = ((XGEData*)info->data)->extensions; + while(it) + { + if (it->extension == extension) + { + return (it->hooks->wire_to_event(dpy, re, event)); + } + it = it->next; + } + + fprintf(stderr, + "_xgeWireToEvent: Unknown extension %d, this should never happen.\n", + extension); + return False; +} + +/* + * xlib event to protocol conversion routine. + */ +Status +_xgeEventToWire(Display* dpy, XEvent* re, xEvent* event) +{ + int extension; + XGEExtList it; + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!info) + return 1; /* error! */ + + extension = ((XGenericEvent*)re)->extension; + + it = ((XGEData*)info->data)->extensions; + while(it) + { + if (it->extension == extension) + { + return (it->hooks->event_to_wire(dpy, re, event)); + } + it = it->next; + } + + fprintf(stderr, + "_xgeEventToWire: Unknown extension %d, this should never happen.\n", + extension); + + return Success; +} + +/* + * Extensions need to register callbacks for their events. + */ +Bool +xgeExtRegister(Display* dpy, int offset, XExtensionHooks* callbacks) +{ + XGEExtNode* newExt; + XGEData* xge_data; + + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!info) + return False; /* error! */ + + if (!_xgeCheckExtInit(dpy, info)) + return False; + + xge_data = (XGEData*)info->data; + + newExt = (XGEExtNode*)Xmalloc(sizeof(XGEExtNode)); + if (!newExt) + { + fprintf(stderr, "xgeExtRegister: Failed to alloc memory.\n"); + return False; + } + + newExt->extension = offset; + newExt->hooks = callbacks; + newExt->next = xge_data->extensions; + xge_data->extensions = newExt; + + return True; +} + +/***********************************************************************/ +/* Client interfaces */ +/***********************************************************************/ + +/* Set event_base and error_base to the matching values for XGE. + * Note that since XGE doesn't use any errors and events, the actual return + * value is of limited use. + */ +Bool +XGEQueryExtension(Display* dpy, int* event_base, int* error_base) +{ + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!_xgeCheckExtInit(dpy, info)) + return False; + + *event_base = info->codes->first_event; + *error_base = info->codes->first_error; + return True; +} + +/* Get XGE version number. + * Doesn't actually get it from server, that should have been done beforehand + * already + */ +Bool +XGEQueryVersion(Display* dpy, + int *major_version, + int *minor_version) +{ + XExtDisplayInfo* info = _xgeFindDisplay(dpy); + if (!info) + return False; + + if (!_xgeCheckExtInit(dpy, info)) + return False; + + *major_version = ((XGEData*)info->data)->vers->major_version; + *minor_version = ((XGEData*)info->data)->vers->minor_version; + + return True; +} + diff --git a/src/extutil.c b/src/extutil.c index 730649a..0f17aae 100644 --- a/src/extutil.c +++ b/src/extutil.c @@ -54,7 +54,11 @@ in this Software without prior written authorization from The Open Group. #include <X11/Xlibint.h> #include <X11/extensions/Xext.h> #include <X11/extensions/extutil.h> +#include <X11/extensions/ge.h> +/* defined in Xge.c */ +extern Bool +xgeExtRegister(Display* dpy, int extension, XExtensionHooks* callbacks); /* * XextCreateExtension - return an extension descriptor containing context @@ -118,6 +122,11 @@ XExtDisplayInfo *XextAddDisplay ( XESetWireToEvent (dpy, j, hooks->wire_to_event); XESetEventToWire (dpy, j, hooks->event_to_wire); } + + /* register extension for XGE */ + if (strcmp(ext_name, GE_NAME)) + xgeExtRegister(dpy, dpyinfo->codes->major_opcode, hooks); + if (hooks->create_gc) XESetCreateGC (dpy, dpyinfo->codes->extension, hooks->create_gc); if (hooks->copy_gc) |