mirror of
https://github.com/kevinbentley/Descent3.git
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99 lines
2.5 KiB
C
99 lines
2.5 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,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,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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{
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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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{
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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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{
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LoadXWindowsExtLibSetNULL();
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if(handle)
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{
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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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{
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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) goto load_error;
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soXShmCreateImage = (XShmCreateImage_fp)dlsym(handle,"XShmCreateImage");
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if(!soXShmCreateImage) goto load_error;
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soXShmDetach = (XShmDetach_fp)dlsym(handle,"XShmDetach");
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if(!soXShmDetach) goto load_error;
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soXShmPutImage = (XShmPutImage_fp)dlsym(handle,"XShmPutImage");
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if(!soXShmPutImage) goto load_error;
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soXShmQueryExtension = (XShmQueryExtension_fp)dlsym(handle,"XShmQueryExtension");
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if(!soXShmQueryExtension) 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 |