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137 lines
4.6 KiB
C
137 lines
4.6 KiB
C
/* $Xorg: GrayPixmap.c,v 1.4 2001/02/09 02:03:52 xorgcvs Exp $ */
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/*
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Copyright 1987, 1988, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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*/
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/***********************************************************
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Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/* $XFree86: xc/lib/Xmu/GrayPixmap.c,v 1.6 2001/12/14 19:55:46 dawes Exp $ */
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#include <stdio.h>
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#include <X11/Intrinsic.h>
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#include <X11/Xmu/Drawing.h>
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typedef struct _PixmapCache {
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Screen *screen;
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Pixmap pixmap;
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Pixel foreground, background;
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unsigned int depth;
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int ref_count;
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struct _PixmapCache *next;
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} CacheEntry;
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static CacheEntry *pixmapCache = NULL;
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Pixmap
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XmuCreateStippledPixmap(Screen *screen, Pixel fore, Pixel back,
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unsigned int depth)
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/*
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* Creates a stippled pixmap of specified depth
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* caches these so that multiple requests share the pixmap
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*/
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{
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register Display *display = DisplayOfScreen(screen);
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CacheEntry *cachePtr;
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Pixmap stippled_pixmap;
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static unsigned char pixmap_bits[] = {
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0x02, 0x01,
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};
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/*
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* Creates a stippled pixmap of depth DefaultDepth(screen)
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* caches these so that multiple requests share the pixmap
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*/
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#define pixmap_width 2
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#define pixmap_height 2
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/* see if we already have a pixmap suitable for this screen */
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for (cachePtr = pixmapCache; cachePtr; cachePtr = cachePtr->next) {
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if (cachePtr->screen == screen && cachePtr->foreground == fore &&
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cachePtr->background == back && cachePtr->depth == depth)
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return( cachePtr->ref_count++, cachePtr->pixmap );
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}
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stippled_pixmap = XCreatePixmapFromBitmapData (display,
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RootWindowOfScreen(screen), (char *)pixmap_bits,
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pixmap_width, pixmap_height, fore, back, depth);
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/* and insert it at the head of the cache */
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cachePtr = XtNew(CacheEntry);
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cachePtr->screen = screen;
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cachePtr->foreground = fore;
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cachePtr->background = back;
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cachePtr->depth = depth;
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cachePtr->pixmap = stippled_pixmap;
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cachePtr->ref_count = 1;
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cachePtr->next = pixmapCache;
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pixmapCache = cachePtr;
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return( stippled_pixmap );
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}
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void
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XmuReleaseStippledPixmap(Screen *screen, Pixmap pixmap)
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{
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register Display *display = DisplayOfScreen(screen);
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CacheEntry *cachePtr, **prevP;
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for (prevP = &pixmapCache, cachePtr = pixmapCache; cachePtr;) {
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if (cachePtr->screen == screen && cachePtr->pixmap == pixmap) {
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if (--cachePtr->ref_count == 0) {
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XFreePixmap( display, pixmap );
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*prevP = cachePtr->next;
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XtFree( (char*)cachePtr );
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break;
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}
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}
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prevP = &cachePtr->next;
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cachePtr = *prevP;
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}
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}
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