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+/* $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 */
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