/* Copyright (c) 1993, 1994, Oracle and/or its affiliates. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ /* ** ** win_update.c ** ** Routines of the update phase for windows. */ #include #ifdef SERVER_DGA #include #endif /* SERVER_DGA */ #include "dga_incls.h" #include "pix_grab.h" #include "mbufsetstr.h" #include "rtn_grab.h" static void dgai_win_getLastSeqs (_Dga_window dgawin, DgaLastSeqsPtr pLastSeqs); static int dgai_win_syncAgain (_Dga_window dgawin, DgaLastSeqsPtr pLastSeqs); static void dgai_win_mb_update (_Dga_window dgawin); static void dgai_mbwin_syncLockSubj (_Dga_window dgawin); /* ** Note: for the sake of simplicity, we always report the following ** types of changes whenever an alias or mbufset composition change ** occurs. We could try to optimize the change reporting and only ** report an attribute change if we know that the attribute has definitely ** changed since the last lock. But this requires a lot of comparison ** between the current and previous lock subjects and the decision ** tree gets quite large. This method of "over reporting" may result ** in some redundant change reports. If we want to do this type of optimization ** in the future, we still can. But for now we keep it simple. ** ** These are the window changes that are automatically reported whenever ** an alias or mbufset composition change occurs. ** ** site ** clip ** curs ** bstore */ /* ** ENTRY ROUTINE FOR WINDOW UPDATE PHASE */ int dgai_win_update (_Dga_window dgawin, short bufIndex) { DgaLastSeqs lastSeqs; /* ** 1. The first thing we do in the update phase is to synchronize ** the client structure. When all pertinent client change ** counters match the server, we are synchronized. The ** reason we must do this in a loop is that some of the ** synchronizations require us to temporarily unlock and ** relock. While the drawable is unlocked, it can undergo ** more changes, so we may need to start the synchronization ** process over. */ /* Determine sequence counts for state reported to client */ dgai_win_getLastSeqs(dgawin, &lastSeqs); /* start accumulating changes */ dgawin->changeMask = 0; /* repeat synchronization functions as needed through possible unlock/relocks */ do { /* first, see if the window shared info is still valid */ if (dgai_mbsmemb_syncZombie(dgawin)) { break; } /* next, we must check the multibuffer state. This may alter the effective lock subject, whose type the other synchronization checks depend on */ if (lastSeqs.mbufseq != *dgawin->s_mbufseq_p) { dgai_win_mb_update(dgawin); lastSeqs.mbufseq = *dgawin->s_mbufseq_p; dgawin->c_mbufseq = lastSeqs.mbufseq; } /* synchronize with current changes to attributes of the effective lock subject -- depends on the type of the current lock subject */ if (DGA_LOCKSUBJ_WINDOW(dgawin, dgawin->eLockSubj)) { dgai_win_syncChanges(dgawin, &lastSeqs); } else if (DGA_LOCKSUBJ_VMBUFFER(dgawin, dgawin->eLockSubj)) { dgai_vmbuf_syncChanges(dgawin, &lastSeqs, bufIndex); } else { /* should never happen */ assert(0); } /* Note: whether we need to sync again depends on the type too */ } while (dgai_win_syncAgain(dgawin, &lastSeqs)); /* Check if the devinfo has changed */ dgai_mbsmemb_devinfo_update(dgawin); /* ** 2. The foregoing synchronization step has determined whether ** any attribute changes have occurred. We must now determine ** if there are any derivative changes to report. ** ** Currently, the only derivative changes for a window or viewable ** multibuffer are those in common with all mbufset members. */ dgai_mbsmemb_figureDerivChgs(dgawin); /* ** 3. Next, we must report changes through notification functions, ** if possible. */ /* report any changes that we can through notification */ dgai_mbsmemb_notify(dgawin); /* ** 4. Lastly, indicate that we are fully synchronized and get out. */ /* the dgawin client structure is now fully synchronized with the shared info */ dgawin->c_wm_chngcnt[bufIndex + 1] = *dgawin->s_chngcnt_p; /* ** 5. If this is an overlay window, then we need to tell the ** server that we may have modified the opaque shape. */ if (dgawin->isOverlay && dgawin->c_ovlstate != DGA_OVLSTATE_CONFLICT) *dgawin->s_ovlshapevalid_p = 0; /* if there are still any changes that were not notified through notification functions, DGA_DRAW_MODIF will return nonzero (the client is supposed to call this routine immediately following the lock). This will cause a well-behaved client to synchronize with the remaining unreported changes */ return (dgawin->changeMask); } static void dgai_win_getLastSeqs (_Dga_window dgawin, DgaLastSeqsPtr pLastSeqs) { pLastSeqs->mbufseq = dgawin->c_mbufseq; pLastSeqs->clipseq = dgawin->c_clipseq; pLastSeqs->curseq = dgawin->c_curseq; pLastSeqs->rtnseq = dgawin->c_rtnseq; } /* ** Returns nonzero if we are still not synchronized */ static int dgai_win_syncAgain (_Dga_window dgawin, DgaLastSeqsPtr pLastSeqs) { /* if a multibuffer change happened, we're still not done */ if (pLastSeqs->mbufseq != *dgawin->s_mbufseq_p) { return (1); } /* Note: there's no need to check cacheseq because the effective lock subject of a window can only be a window or viewable multibuffer. Neither of these are cached */ if (DGA_LOCKSUBJ_WINDOW(dgawin, dgawin->eLockSubj)) { if ((pLastSeqs->clipseq == *dgawin->s_clipseq_p) && (pLastSeqs->curseq == *dgawin->s_curseq_p) && (pLastSeqs->rtnseq == *dgawin->s_rtnseq_p) && (!dgawin->isOverlay || dgawin->c_ovlstate == *dgawin->s_ovlstate_p)) { return (0); } } else if (DGA_LOCKSUBJ_VMBUFFER(dgawin, dgawin->eLockSubj)) { if ((pLastSeqs->clipseq == *dgawin->s_clipseq_p) && (pLastSeqs->curseq == *dgawin->s_curseq_p)) { /* Note: viewable mbuf never has bstore to sync up to */ return (0); } } else { /* should never happen */ assert(0); } /* we're not synchronized; need to go around the loop again */ return (1); } /* ** Called at window lock time when we have detected an mbufset change. ** At the return of this routine, dgawin->eLockSubj indicates the member ** drawable for which subsequent changes are to be detected. */ static void dgai_win_mb_update (_Dga_window dgawin) { /* react to enable and composition changes */ dgai_mbsmemb_syncMbufset(dgawin); /* if window is multibuffered we may need synchronization */ if (dgawin->pMbs) { /* synchronize with any display buffer change */ dgai_mbwin_syncLockSubj(dgawin); /* synchronize render buffer state (if necessary) */ dgai_mbsmemb_syncRendBuf(dgawin); } /* an mbufset change causes us to report changes to all attrs */ { u_int reportChanges; if (DGA_LOCKSUBJ_WINDOW(dgawin, dgawin->eLockSubj)) { reportChanges = DGA_WIN_CHANGEABLE_ATTRS; } else if (DGA_LOCKSUBJ_VMBUFFER(dgawin, dgawin->eLockSubj)) { reportChanges = DGA_VMBUF_CHANGEABLE_ATTRS; } else { /* should never happen */ assert(0); } dgawin->changeMask |= (DGA_CHANGE_MBUFSET | reportChanges); } } /* ** Determine effective lock subject for a multibuffered window. */ static void dgai_mbwin_syncLockSubj (_Dga_window dgawin) { WXINFO *infop; infop = (WXINFO *) dgawin->w_info; /* see if there is window aliasing. Window aliasing can only happen in video flip mode */ if (infop->w_mbsInfo.flipMode == DGA_MBFLIP_VIDEO) { /* when the window is aliased, the effective lock subject is the currently displayed buffer */ dgawin->eLockSubj = infop->wx_dbuf.display_buffer; if (dgawin->eLockSubj != dgawin->eLockSubjPrev) { /* an alias change causes us to report changes on all attributes */ dgawin->changeMask |= (DGA_CHANGE_ALIAS | DGA_WIN_CHANGEABLE_ATTRS); } } } /* ** Current lock subject is a window. Synchronize with changes. */ void dgai_win_syncChanges (_Dga_window dgawin, DgaLastSeqsPtr pLastSeqs) { /* clip state has changed? */ if (pLastSeqs->clipseq != *dgawin->s_clipseq_p) { dgawin->changeMask |= DGA_CHANGE_CLIP; dgai_win_clip_update(dgawin); pLastSeqs->clipseq = *dgawin->s_clipseq_p; } /* cursor state has changed? */ if (pLastSeqs->curseq != *dgawin->s_curseq_p) { dgawin->changeMask |= DGA_CHANGE_CURSOR; dgai_win_curs_update(dgawin); pLastSeqs->curseq = *dgawin->s_curseq_p; } /* backing store state has changed? */ if ((pLastSeqs->rtnseq != *dgawin->s_rtnseq_p) || ((dgawin->rtn_flags & RTN_GRABBED) && !(dgawin->rtn_flags & RTN_MAPPED))) { dgawin->changeMask |= DGA_CHANGE_BSTORE; dgai_win_rtn_update(dgawin); pLastSeqs->rtnseq = *dgawin->s_rtnseq_p; } if (dgawin->isOverlay && dgawin->c_ovlstate != *dgawin->s_ovlstate_p) { dgawin->changeMask |= DGA_CHANGE_OVLSTATE; dgawin->c_ovlstate = *dgawin->s_ovlstate_p; } }