| 1 | /* xscreensaver, Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998, 2001 |
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| 2 | * by Jamie Zawinski <jwz@jwz.org> |
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| 3 | * |
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| 4 | * Permission to use, copy, modify, distribute, and sell this software and its |
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| 5 | * documentation for any purpose is hereby granted without fee, provided that |
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| 6 | * the above copyright notice appear in all copies and that both that |
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| 7 | * copyright notice and this permission notice appear in supporting |
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| 8 | * documentation. No representations are made about the suitability of this |
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| 9 | * software for any purpose. It is provided "as is" without express or |
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| 10 | * implied warranty. |
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| 11 | */ |
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| 12 | |
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| 13 | /* The MIT-SHM (Shared Memory) extension is pretty tricky to use. |
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| 14 | This file contains the common boiler-plate for creating a shared |
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| 15 | XImage structure, and for making sure that the shared memory segments |
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| 16 | get allocated and shut down cleanly. |
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| 17 | */ |
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| 18 | |
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| 19 | #ifndef __XSCREENSAVER_XSHM_H__ |
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| 20 | |
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| 21 | #ifdef HAVE_XSHM_EXTENSION |
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| 22 | |
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| 23 | # include <sys/ipc.h> |
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| 24 | # include <sys/shm.h> |
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| 25 | # include <X11/extensions/XShm.h> |
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| 26 | |
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| 27 | extern XImage *create_xshm_image (Display *dpy, Visual *visual, |
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| 28 | unsigned int depth, |
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| 29 | int format, char *data, |
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| 30 | XShmSegmentInfo *shm_info, |
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| 31 | unsigned int width, unsigned int height); |
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| 32 | extern void destroy_xshm_image (Display *dpy, XImage *image, |
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| 33 | XShmSegmentInfo *shm_info); |
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| 34 | |
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| 35 | #endif /* HAVE_XSHM_EXTENSION */ |
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| 36 | |
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| 37 | #endif /* __XSCREENSAVER_XSHM_H__ */ |
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