mirror of
https://github.com/kevinbentley/Descent3.git
synced 2025-01-23 12:08:56 +00:00
99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/*
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* Descent 3
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* Copyright (C) 2024 Parallax Software
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#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/xf86dga.h>
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#define XF86DGAQueryVersion DGAQueryVersion
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#define XF86DGAQueryExtension DGAQueryExtension
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#define XF86DGADirectVideo DGADirectVideo
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typedef Bool (*DGAQueryVersion_fp)(Display *pa, int *pb, int *pc);
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FEXTERN DGAQueryVersion_fp DGAQueryVersion;
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typedef Bool (*DGAQueryExtension_fp)(Display *pa, int *pb, int *pc);
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FEXTERN DGAQueryExtension_fp DGAQueryExtension;
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typedef Status (*DGADirectVideo_fp)(Display *pa, int pb, int pc);
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FEXTERN DGADirectVideo_fp DGADirectVideo;
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#ifndef DECLARE_POINTERS
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bool LoadOutrageXWindowsLib(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 LoadOutrageXWindowsLibSetNULL(void) {
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DGAQueryVersion = NULL;
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DGAQueryExtension = NULL;
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DGADirectVideo = NULL;
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}
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bool LoadOutrageXWindowsLib(bool load) {
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#define XWINDOWSEXTLIB "OutrageDynXLib.so"
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static void *handle = NULL;
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if (!load) {
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LoadOutrageXWindowsLibSetNULL();
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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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DGAQueryVersion = (DGAQueryVersion_fp)dlsym(handle, "DGAQueryVersion");
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if (!DGAQueryVersion)
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goto load_error;
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DGAQueryExtension = (DGAQueryExtension_fp)dlsym(handle, "DGAQueryExtension");
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if (!DGAQueryExtension)
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goto load_error;
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DGADirectVideo = (DGADirectVideo_fp)dlsym(handle, "DGADirectVideo");
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if (!DGADirectVideo)
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goto load_error;
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return true;
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load_error:
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LoadOutrageXWindowsLibSetNULL();
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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 |