mirror of
https://github.com/kevinbentley/Descent3.git
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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
#ifdef DECLARE_POINTERS
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#define FEXTERN
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#else
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#define FEXTERN extern
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#endif
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/extensions/XShm.h>
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#define XShmAttach soXShmAttach
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#define XShmCreateImage soXShmCreateImage
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#define XShmDetach soXShmDetach
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#define XShmPutImage soXShmPutImage
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#define XShmQueryExtension soXShmQueryExtension
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typedef Status (*XShmAttach_fp)(Display *, XShmSegmentInfo *);
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FEXTERN XShmAttach_fp soXShmAttach;
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typedef XImage *(*XShmCreateImage_fp)(Display *, Visual *, unsigned int, int, char *, XShmSegmentInfo *, unsigned int,
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unsigned int);
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FEXTERN XShmCreateImage_fp soXShmCreateImage;
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typedef Status (*XShmDetach_fp)(Display *, XShmSegmentInfo *);
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FEXTERN XShmDetach_fp soXShmDetach;
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typedef Status (*XShmPutImage_fp)(Display *, Drawable, GC, XImage *, int, int, int, int, unsigned int, unsigned int,
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Bool);
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FEXTERN XShmPutImage_fp soXShmPutImage;
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typedef Bool (*XShmQueryExtension_fp)(Display *);
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FEXTERN XShmQueryExtension_fp soXShmQueryExtension;
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#ifndef DECLARE_POINTERS
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bool LoadXWindowsExtLib(bool load = true);
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#else
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <stdio.h>
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void LoadXWindowsExtLibSetNULL(void) {
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soXShmAttach = NULL;
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soXShmCreateImage = NULL;
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soXShmDetach = NULL;
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soXShmPutImage = NULL;
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soXShmQueryExtension = NULL;
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}
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bool LoadXWindowsExtLib(bool load) {
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#define XWINDOWSEXTLIB "libXext.so"
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static void *handle = NULL;
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if (!load) {
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LoadXWindowsExtLibSetNULL();
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if (handle) {
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dlclose(handle);
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handle = NULL;
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return true;
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}
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fprintf(stderr, "Library Unload Failed: %s\n", XWINDOWSEXTLIB);
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return false;
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}
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if (handle)
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return true;
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// Load the library
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handle = dlopen(XWINDOWSEXTLIB, RTLD_LAZY | RTLD_GLOBAL);
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if (!handle) {
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fprintf(stderr, "Library Load Failed: %s\n", XWINDOWSEXTLIB);
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return false;
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}
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soXShmAttach = (XShmAttach_fp)dlsym(handle, "XShmAttach");
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if (!soXShmAttach)
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goto load_error;
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soXShmCreateImage = (XShmCreateImage_fp)dlsym(handle, "XShmCreateImage");
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if (!soXShmCreateImage)
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goto load_error;
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soXShmDetach = (XShmDetach_fp)dlsym(handle, "XShmDetach");
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if (!soXShmDetach)
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goto load_error;
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soXShmPutImage = (XShmPutImage_fp)dlsym(handle, "XShmPutImage");
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if (!soXShmPutImage)
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goto load_error;
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soXShmQueryExtension = (XShmQueryExtension_fp)dlsym(handle, "XShmQueryExtension");
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if (!soXShmQueryExtension)
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goto load_error;
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return true;
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load_error:
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LoadXWindowsExtLibSetNULL();
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fprintf(stderr, "Library Symbol Resolve Error: %s\n", XWINDOWSEXTLIB);
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dlclose(handle);
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handle = NULL;
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return false;
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}
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#endif |