1 /*
2
3 Copyright 1987, 1988, 1998 The Open Group
4
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.
10
11 The above copyright notice and this permission notice shall be included in
12 all copies or substantial portions of the Software.
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21 Except as contained in this notice, the name of The Open Group shall not be
22 used in advertising or otherwise to promote the sale, use or other dealings
23 in this Software without prior written authorization from The Open Group.
24
25 */
26
27 /***********************************************************
28
29 Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.
30
31 All Rights Reserved
32
33 Permission to use, copy, modify, and distribute this software and its
34 documentation for any purpose and without fee is hereby granted,
35 provided that the above copyright notice appear in all copies and that
36 both that copyright notice and this permission notice appear in
37 supporting documentation, and that the name of Digital not be
38 used in advertising or publicity pertaining to distribution of the
39 software without specific, written prior permission.
40
41 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
42 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
43 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
44 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
45 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
46 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
47 SOFTWARE.
48
49 ******************************************************************/
50
51 #ifdef HAVE_CONFIG_H
52 #include <config.h>
53 #endif
54 #include <stdio.h>
55 #include <X11/Intrinsic.h>
56 #include <X11/Xmu/Drawing.h>
57
58 typedef struct _PixmapCache {
59 Screen *screen;
60 Pixmap pixmap;
61 Pixel foreground, background;
62 unsigned int depth;
63 int ref_count;
64 struct _PixmapCache *next;
65 } CacheEntry;
66
67 static CacheEntry *pixmapCache = NULL;
68
69
70
71 Pixmap
XmuCreateStippledPixmap(Screen * screen,Pixel fore,Pixel back,unsigned int depth)72 XmuCreateStippledPixmap(Screen *screen, Pixel fore, Pixel back,
73 unsigned int depth)
74 /*
75 * Creates a stippled pixmap of specified depth
76 * caches these so that multiple requests share the pixmap
77 */
78 {
79 register Display *display = DisplayOfScreen(screen);
80 CacheEntry *cachePtr;
81 Pixmap stippled_pixmap;
82 static unsigned char pixmap_bits[] = {
83 0x02, 0x01,
84 };
85
86 /*
87 * Creates a stippled pixmap of depth DefaultDepth(screen)
88 * caches these so that multiple requests share the pixmap
89 */
90
91 #define pixmap_width 2
92 #define pixmap_height 2
93
94 /* see if we already have a pixmap suitable for this screen */
95 for (cachePtr = pixmapCache; cachePtr; cachePtr = cachePtr->next) {
96 if (cachePtr->screen == screen && cachePtr->foreground == fore &&
97 cachePtr->background == back && cachePtr->depth == depth)
98 return( cachePtr->ref_count++, cachePtr->pixmap );
99 }
100
101 stippled_pixmap = XCreatePixmapFromBitmapData (display,
102 RootWindowOfScreen(screen), (char *)pixmap_bits,
103 pixmap_width, pixmap_height, fore, back, depth);
104
105 /* and insert it at the head of the cache */
106 cachePtr = XtNew(CacheEntry);
107 cachePtr->screen = screen;
108 cachePtr->foreground = fore;
109 cachePtr->background = back;
110 cachePtr->depth = depth;
111 cachePtr->pixmap = stippled_pixmap;
112 cachePtr->ref_count = 1;
113 cachePtr->next = pixmapCache;
114 pixmapCache = cachePtr;
115
116 return( stippled_pixmap );
117 }
118
119 void
XmuReleaseStippledPixmap(Screen * screen,Pixmap pixmap)120 XmuReleaseStippledPixmap(Screen *screen, Pixmap pixmap)
121 {
122 register Display *display = DisplayOfScreen(screen);
123 CacheEntry *cachePtr, **prevP;
124 for (prevP = &pixmapCache, cachePtr = pixmapCache; cachePtr;) {
125 if (cachePtr->screen == screen && cachePtr->pixmap == pixmap) {
126 if (--cachePtr->ref_count == 0) {
127 XFreePixmap( display, pixmap );
128 *prevP = cachePtr->next;
129 XtFree( (char*)cachePtr );
130 break;
131 }
132 }
133 prevP = &cachePtr->next;
134 cachePtr = *prevP;
135 }
136 }
137