2 * Copyright © 2003 Keith Packard
3 * Copyright © 2007 Eric Anholt
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of Keith Packard not be used in
10 * advertising or publicity pertaining to distribution of the software without
11 * specific, written prior permission. Keith Packard makes no
12 * representations about the suitability of this software for any purpose. It
13 * is provided "as is" without express or implied warranty.
15 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21 * PERFORMANCE OF THIS SOFTWARE.
27 #include "xdamageint.h"
29 XDamageExtInfo XDamageExtensionInfo;
31 const char XDamageExtensionName[] = DAMAGE_NAME;
34 XDamageCloseDisplay (Display *dpy, XExtCodes *codes);
37 XDamageWireToEvent(Display *dpy, XEvent *event, xEvent *wire);
40 XDamageEventToWire(Display *dpy, XEvent *event, xEvent *wire);
43 * XDamageExtAddDisplay - add a display to this extension. (Replaces
46 static XDamageExtDisplayInfo *
47 XDamageExtAddDisplay (XDamageExtInfo *extinfo,
51 XDamageExtDisplayInfo *info;
54 info = (XDamageExtDisplayInfo *) Xmalloc (sizeof (XDamageExtDisplayInfo));
55 if (!info) return NULL;
58 info->codes = XInitExtension (dpy, ext_name);
61 * if the server has the extension, then we can initialize the
62 * appropriate function vectors
65 xDamageQueryVersionReply rep;
66 xDamageQueryVersionReq *req;
67 XESetCloseDisplay (dpy, info->codes->extension,
69 for (ev = info->codes->first_event;
70 ev < info->codes->first_event + XDamageNumberEvents;
73 XESetWireToEvent (dpy, ev, XDamageWireToEvent);
74 XESetEventToWire (dpy, ev, XDamageEventToWire);
77 * Get the version info
80 GetReq (DamageQueryVersion, req);
81 req->reqType = info->codes->major_opcode;
82 req->damageReqType = X_DamageQueryVersion;
83 req->majorVersion = DAMAGE_MAJOR;
84 req->minorVersion = DAMAGE_MINOR;
85 if (!_XReply (dpy, (xReply *) &rep, 0, xTrue))
92 info->major_version = rep.majorVersion;
93 info->minor_version = rep.minorVersion;
97 /* The server doesn't have this extension.
98 * Use a private Xlib-internal extension to hang the close_display
99 * hook on so that the "cache" (extinfo->cur) is properly cleaned.
102 XExtCodes *codes = XAddExtension(dpy);
107 XESetCloseDisplay (dpy, codes->extension, XDamageCloseDisplay);
111 * now, chain it onto the list
113 _XLockMutex(_Xglobal_lock);
114 info->next = extinfo->head;
115 extinfo->head = info;
117 extinfo->ndisplays++;
118 _XUnlockMutex(_Xglobal_lock);
124 * XDamageExtRemoveDisplay - remove the indicated display from the
125 * extension object. (Replaces XextRemoveDisplay.)
128 XDamageExtRemoveDisplay (XDamageExtInfo *extinfo, Display *dpy)
130 XDamageExtDisplayInfo *info, *prev;
133 * locate this display and its back link so that it can be removed
135 _XLockMutex(_Xglobal_lock);
137 for (info = extinfo->head; info; info = info->next) {
138 if (info->display == dpy) break;
142 _XUnlockMutex(_Xglobal_lock);
143 return 0; /* hmm, actually an error */
147 * remove the display from the list; handles going to zero
150 prev->next = info->next;
152 extinfo->head = info->next;
154 extinfo->ndisplays--;
155 if (info == extinfo->cur) extinfo->cur = NULL; /* flush cache */
156 _XUnlockMutex(_Xglobal_lock);
158 Xfree ((char *) info);
163 * XDamageExtFindDisplay - look for a display in this extension; keeps a
164 * cache of the most-recently used for efficiency. (Replaces
167 static XDamageExtDisplayInfo *
168 XDamageExtFindDisplay (XDamageExtInfo *extinfo,
171 XDamageExtDisplayInfo *info;
174 * see if this was the most recently accessed display
176 if ((info = extinfo->cur) && info->display == dpy)
180 * look for display in list
182 _XLockMutex(_Xglobal_lock);
183 for (info = extinfo->head; info; info = info->next) {
184 if (info->display == dpy) {
185 extinfo->cur = info; /* cache most recently used */
186 _XUnlockMutex(_Xglobal_lock);
190 _XUnlockMutex(_Xglobal_lock);
195 XDamageExtDisplayInfo *
196 XDamageFindDisplay (Display *dpy)
198 XDamageExtDisplayInfo *info;
200 info = XDamageExtFindDisplay (&XDamageExtensionInfo, dpy);
202 info = XDamageExtAddDisplay (&XDamageExtensionInfo, dpy,
203 XDamageExtensionName);
208 XDamageCloseDisplay (Display *dpy, XExtCodes *codes)
210 return XDamageExtRemoveDisplay (&XDamageExtensionInfo, dpy);
214 XDamageWireToEvent(Display *dpy, XEvent *event, xEvent *wire)
216 XDamageExtDisplayInfo *info = XDamageFindDisplay(dpy);
218 XDamageCheckExtension(dpy, info, False);
220 switch ((wire->u.u.type & 0x7F) - info->codes->first_event)
222 case XDamageNotify: {
223 XDamageNotifyEvent *aevent = (XDamageNotifyEvent *) event;
224 xDamageNotifyEvent *awire = (xDamageNotifyEvent *) wire;
226 aevent->type = awire->type & 0x7F;
227 aevent->serial = _XSetLastRequestRead(dpy,
228 (xGenericReply *) wire);
229 aevent->send_event = (awire->type & 0x80) != 0;
230 aevent->display = dpy;
231 aevent->drawable = awire->drawable;
232 aevent->damage = awire->damage;
233 aevent->level = awire->level & ~DamageNotifyMore;
234 aevent->more = (awire->level & DamageNotifyMore) ? True : False;
235 aevent->timestamp = awire->timestamp;
236 aevent->area.x = awire->area.x;
237 aevent->area.y = awire->area.y;
238 aevent->area.width = awire->area.width;
239 aevent->area.height = awire->area.height;
240 aevent->geometry.x = awire->geometry.x;
241 aevent->geometry.y = awire->geometry.y;
242 aevent->geometry.width = awire->geometry.width;
243 aevent->geometry.height = awire->geometry.height;
251 XDamageEventToWire(Display *dpy, XEvent *event, xEvent *wire)
253 XDamageExtDisplayInfo *info = XDamageFindDisplay(dpy);
255 XDamageCheckExtension(dpy, info, False);
257 switch ((event->type & 0x7F) - info->codes->first_event)
259 case XDamageNotify: {
260 XDamageNotifyEvent *aevent;
261 xDamageNotifyEvent *awire;
262 awire = (xDamageNotifyEvent *) wire;
263 aevent = (XDamageNotifyEvent *) event;
264 awire->type = aevent->type | (aevent->send_event ? 0x80 : 0);
265 awire->drawable = aevent->drawable;
266 awire->damage = aevent->damage;
267 awire->level = aevent->level | (aevent->more ? DamageNotifyMore : 0);
268 awire->timestamp = aevent->timestamp;
269 awire->area.x = aevent->area.x;
270 awire->area.y = aevent->area.y;
271 awire->area.width = aevent->area.width;
272 awire->area.height = aevent->area.height;
273 awire->geometry.x = aevent->geometry.x;
274 awire->geometry.y = aevent->geometry.y;
275 awire->geometry.width = aevent->geometry.width;
276 awire->geometry.height = aevent->geometry.height;
284 XDamageQueryExtension (Display *dpy,
285 int *event_base_return,
286 int *error_base_return)
288 XDamageExtDisplayInfo *info = XDamageFindDisplay (dpy);
290 if (XDamageHasExtension(info))
292 *event_base_return = info->codes->first_event;
293 *error_base_return = info->codes->first_error;
301 XDamageQueryVersion (Display *dpy,
302 int *major_version_return,
303 int *minor_version_return)
305 XDamageExtDisplayInfo *info = XDamageFindDisplay (dpy);
307 XDamageCheckExtension (dpy, info, 0);
309 *major_version_return = info->major_version;
310 *minor_version_return = info->minor_version;
315 XDamageCreate (Display *dpy, Drawable drawable, int level)
317 XDamageExtDisplayInfo *info = XDamageFindDisplay (dpy);
318 xDamageCreateReq *req;
321 XDamageCheckExtension (dpy, info, 0);
323 GetReq (DamageCreate, req);
324 req->reqType = info->codes->major_opcode;
325 req->damageReqType = X_DamageCreate;
326 req->damage = damage = XAllocID (dpy);
327 req->drawable = drawable;
335 XDamageDestroy (Display *dpy, Damage damage)
337 XDamageExtDisplayInfo *info = XDamageFindDisplay (dpy);
338 xDamageDestroyReq *req;
340 XDamageSimpleCheckExtension (dpy, info);
342 GetReq (DamageDestroy, req);
343 req->reqType = info->codes->major_opcode;
344 req->damageReqType = X_DamageDestroy;
345 req->damage = damage;
351 XDamageSubtract (Display *dpy, Damage damage,
352 XserverRegion repair, XserverRegion parts)
354 XDamageExtDisplayInfo *info = XDamageFindDisplay (dpy);
355 xDamageSubtractReq *req;
357 XDamageSimpleCheckExtension (dpy, info);
359 GetReq (DamageSubtract, req);
360 req->reqType = info->codes->major_opcode;
361 req->damageReqType = X_DamageSubtract;
362 req->damage = damage;
363 req->repair = repair;
370 XDamageAdd (Display *dpy, Drawable drawable, XserverRegion region)
372 XDamageExtDisplayInfo *info = XDamageFindDisplay (dpy);
375 XDamageSimpleCheckExtension (dpy, info);
377 GetReq (DamageAdd, req);
378 req->reqType = info->codes->major_opcode;
379 req->damageReqType = X_DamageAdd;
380 req->drawable = drawable;
381 req->region = region;