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Diffstat (limited to 'src/GCManager.c')
| -rw-r--r-- | src/GCManager.c | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/src/GCManager.c b/src/GCManager.c new file mode 100644 index 0000000..e80c758 --- /dev/null +++ b/src/GCManager.c @@ -0,0 +1,350 @@ +/* $Xorg: GCManager.c,v 1.5 2001/02/09 02:03:54 xorgcvs Exp $ */ + +/*********************************************************** +Copyright 1987, 1988, 1990 by Digital Equipment Corporation, Maynard, Massachusetts +Copyright 1993 by Sun Microsystems, Inc. Mountain View, CA. + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +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 names of Digital or Sun not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL 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. + +SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, +INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT- +NESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SUN BE LI- +ABLE 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. + +******************************************************************/ + +/* + +Copyright 1987, 1988, 1990, 1994, 1998 The Open Group + +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. + +The above copyright notice and this permission notice 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 +OPEN GROUP 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. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +*/ + +#include "IntrinsicI.h" + + +typedef struct _GCrec { + unsigned char screen; /* Screen for GC */ + unsigned char depth; /* Depth for GC */ + char dashes; /* Dashes value */ + Pixmap clip_mask; /* Clip_mask value */ + Cardinal ref_count; /* # of shareholders */ + GC gc; /* The GC itself. */ + XtGCMask dynamic_mask; /* Writable values */ + XtGCMask unused_mask; /* Unused values */ + struct _GCrec *next; /* Next GC for this widgetkind. */ +} GCrec, *GCptr; + +#define GCVAL(bit,mask,val,default) ((bit&mask) ? val : default) + +#define CHECK(bit,comp,default) \ + if ((checkMask & bit) && \ + (GCVAL(bit,valueMask,v->comp,default) != gcv.comp)) return False + +#define ALLGCVALS (GCFunction | GCPlaneMask | GCForeground | \ + GCBackground | GCLineWidth | GCLineStyle | \ + GCCapStyle | GCJoinStyle | GCFillStyle | \ + GCFillRule | GCTile | GCStipple | \ + GCTileStipXOrigin | GCTileStipYOrigin | \ + GCFont | GCSubwindowMode | GCGraphicsExposures | \ + GCClipXOrigin | GCClipYOrigin | GCDashOffset | \ + GCArcMode) + +static Bool Matches(dpy, ptr, valueMask, v, readOnlyMask, dynamicMask) + Display *dpy; + GCptr ptr; + register XtGCMask valueMask; + register XGCValues *v; + XtGCMask readOnlyMask; + XtGCMask dynamicMask; +{ + XGCValues gcv; + register XtGCMask checkMask; + + if (readOnlyMask & ptr->dynamic_mask) + return False; + if (((ptr->dynamic_mask|ptr->unused_mask) & dynamicMask) != dynamicMask) + return False; + if (!XGetGCValues(dpy, ptr->gc, ALLGCVALS, &gcv)) + return False; + checkMask = readOnlyMask & ~ptr->unused_mask; + CHECK(GCForeground, foreground, 0); + CHECK(GCBackground, background, 1); + CHECK(GCFont, font, ~0L); + CHECK(GCFillStyle, fill_style, FillSolid); + CHECK(GCLineWidth, line_width, 0); + CHECK(GCFunction, function, GXcopy); + CHECK(GCGraphicsExposures, graphics_exposures, True); + CHECK(GCTile, tile, ~0L); + CHECK(GCSubwindowMode, subwindow_mode, ClipByChildren); + CHECK(GCPlaneMask, plane_mask, AllPlanes); + CHECK(GCLineStyle, line_style, LineSolid); + CHECK(GCCapStyle, cap_style, CapButt); + CHECK(GCJoinStyle, join_style, JoinMiter); + CHECK(GCFillRule, fill_rule, EvenOddRule); + CHECK(GCArcMode, arc_mode, ArcPieSlice); + CHECK(GCStipple, stipple, ~0L); + CHECK(GCTileStipXOrigin, ts_x_origin, 0); + CHECK(GCTileStipYOrigin, ts_y_origin, 0); + CHECK(GCClipXOrigin, clip_x_origin, 0); + CHECK(GCClipYOrigin, clip_y_origin, 0); + CHECK(GCDashOffset, dash_offset, 0); + gcv.clip_mask = ptr->clip_mask; + CHECK(GCClipMask, clip_mask, None); + gcv.dashes = ptr->dashes; + CHECK(GCDashList, dashes, 4); + valueMask &= ptr->unused_mask | dynamicMask; + if (valueMask) { + XChangeGC(dpy, ptr->gc, valueMask, v); + if (valueMask & GCDashList) + ptr->dashes = v->dashes; + if (valueMask & GCClipMask) + ptr->clip_mask = v->clip_mask; + } + ptr->unused_mask &= ~(dynamicMask | readOnlyMask); + ptr->dynamic_mask |= dynamicMask; + return True; +} /* Matches */ + +/* Called by CloseDisplay to free the per-display GC list */ +void _XtGClistFree(dpy, pd) + Display *dpy; + register XtPerDisplay pd; +{ + register GCptr GClist, next; + register int i; + + GClist = pd->GClist; + while (GClist) { + next = GClist->next; + XtFree((char*)GClist); + GClist = next; + } + if (pd->pixmap_tab) { + for (i = ScreenCount(dpy); --i >= 0; ) { + if (pd->pixmap_tab[i]) + XtFree((char *)pd->pixmap_tab[i]); + } + XtFree((char *)pd->pixmap_tab); + } +} + + +/* + * Return a GC with the given values and characteristics. + */ + +GC XtAllocateGC(widget, depth, valueMask, values, dynamicMask, unusedMask) + register Widget widget; + Cardinal depth; + XtGCMask valueMask; + XGCValues *values; + XtGCMask dynamicMask; + XtGCMask unusedMask; +{ + register GCptr *prev; + register GCptr cur; + Screen *screen; + register Display *dpy; + register XtPerDisplay pd; + Drawable drawable; + Drawable *pixmaps; + XtGCMask readOnlyMask; + GC retval; + WIDGET_TO_APPCON(widget); + + LOCK_APP(app); + LOCK_PROCESS; + if (!XtIsWidget(widget)) + widget = _XtWindowedAncestor(widget); + if (!depth) + depth = widget->core.depth; + screen = XtScreen(widget); + dpy = DisplayOfScreen(screen); + pd = _XtGetPerDisplay(dpy); + unusedMask &= ~valueMask; + readOnlyMask = ~(dynamicMask | unusedMask); + + /* Search for existing GC that matches exactly */ + for (prev = &pd->GClist; (cur = *prev); prev = &cur->next) { + if (cur->depth == depth && + ScreenOfDisplay(dpy, cur->screen) == screen && + Matches(dpy, cur, valueMask, values, readOnlyMask, dynamicMask)) { + cur->ref_count++; + /* Move this GC to front of list */ + *prev = cur->next; + cur->next = pd->GClist; + pd->GClist = cur; + retval = cur->gc; + UNLOCK_PROCESS; + UNLOCK_APP(app); + return retval; + } + } + + /* No matches, have to create a new one */ + cur = XtNew(GCrec); + cur->screen = XScreenNumberOfScreen(screen); + cur->depth = depth; + cur->ref_count = 1; + cur->dynamic_mask = dynamicMask; + cur->unused_mask = (unusedMask & ~dynamicMask); + cur->dashes = GCVAL(GCDashList, valueMask, values->dashes, 4); + cur->clip_mask = GCVAL(GCClipMask, valueMask, values->clip_mask, None); + drawable = 0; + if (depth == widget->core.depth) + drawable = XtWindow(widget); + if (!drawable && depth == DefaultDepthOfScreen(screen)) + drawable = RootWindowOfScreen(screen); + if (!drawable) { + if (!pd->pixmap_tab) { + int n; + pd->pixmap_tab = (Drawable **)__XtMalloc((unsigned)ScreenCount(dpy) * + sizeof(Drawable *)); + for (n = 0; n < ScreenCount(dpy); n++) + pd->pixmap_tab[n] = NULL; + } + pixmaps = pd->pixmap_tab[cur->screen]; + if (!pixmaps) { + int max, n, *depths; + depths = XListDepths(dpy, cur->screen, &n); + n--; + max = depths[n]; + while (n--) { + if (depths[n] > max) + max = depths[n]; + } + XFree((char *)depths); + pixmaps = (Drawable *)__XtCalloc((unsigned)max, sizeof(Drawable)); + pd->pixmap_tab[cur->screen] = pixmaps; + } + drawable = pixmaps[cur->depth - 1]; + if (!drawable) { + drawable = XCreatePixmap(dpy, RootWindowOfScreen(screen), 1, 1, + cur->depth); + pixmaps[cur->depth - 1] = drawable; + } + } + cur->gc = XCreateGC(dpy, drawable, valueMask, values); + cur->next = pd->GClist; + pd->GClist = cur; + retval = cur->gc; + UNLOCK_PROCESS; + UNLOCK_APP(app); + return retval; +} /* XtAllocateGC */ + +/* + * Return a read-only GC with the given values. + */ + +GC XtGetGC(widget, valueMask, values) + register Widget widget; + XtGCMask valueMask; + XGCValues *values; +{ + return XtAllocateGC(widget, 0, valueMask, values, 0, 0); +} /* XtGetGC */ + +void XtReleaseGC(widget, gc) + Widget widget; + register GC gc; +{ + register GCptr cur, *prev; + Display* dpy; + XtPerDisplay pd; + WIDGET_TO_APPCON(widget); + + LOCK_APP(app); + LOCK_PROCESS; + dpy = XtDisplayOfObject(widget); + pd = _XtGetPerDisplay(dpy); + + for (prev = &pd->GClist; (cur = *prev); prev = &cur->next) { + if (cur->gc == gc) { + if (--(cur->ref_count) == 0) { + *prev = cur->next; + XFreeGC(dpy, gc); + XtFree((char *) cur); + } + break; + } + } + UNLOCK_PROCESS; + UNLOCK_APP(app); +} /* XtReleaseGC */ + +/* The following interface is broken and supplied only for backwards + * compatibility. It will work properly in all cases only if there + * is exactly 1 Display created by the application. + */ + +void XtDestroyGC(gc) + register GC gc; +{ + GCptr cur, *prev; + XtAppContext app; + + LOCK_PROCESS; + app = _XtGetProcessContext()->appContextList; + /* This is awful; we have to search through all the lists + to find the GC. */ + for (; app; app = app->next) { + int i; + for (i = app->count; i ;) { + Display *dpy = app->list[--i]; + XtPerDisplay pd = _XtGetPerDisplay(dpy); + for (prev = &pd->GClist; (cur = *prev); prev = &cur->next) { + if (cur->gc == gc) { + if (--(cur->ref_count) == 0) { + *prev = cur->next; + XFreeGC(dpy, gc); + XtFree((char *) cur); + } + UNLOCK_PROCESS; + return; + } + } + } + } + UNLOCK_PROCESS; +} /* XtDestroyGC */ |