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      1 #include <string.h>
      2 #include <stdlib.h>
      3 #include <X11/Xlib.h>
      4 
      5 #include "glvnd/libglxabi.h"
      6 
      7 #include "glxglvnd.h"
      8 
      9 static Bool __glXGLVNDIsScreenSupported(Display *dpy, int screen)
     10 {
     11     /* TODO: Think of a better heuristic... */
     12     return True;
     13 }
     14 
     15 static void *__glXGLVNDGetProcAddress(const GLubyte *procName)
     16 {
     17     return glXGetProcAddressARB(procName);
     18 }
     19 
     20 static int
     21 compare(const void *l, const void *r)
     22 {
     23     const char *s = *(const char **)r;
     24     return strcmp(l, s);
     25 }
     26 
     27 static unsigned FindGLXFunction(const GLubyte *name)
     28 {
     29     const char **match;
     30 
     31     match = bsearch(name, __glXDispatchTableStrings, DI_FUNCTION_COUNT,
     32                     sizeof(const char *), compare);
     33 
     34     if (match == NULL)
     35         return DI_FUNCTION_COUNT;
     36 
     37     return match - __glXDispatchTableStrings;
     38 }
     39 
     40 static void *__glXGLVNDGetDispatchAddress(const GLubyte *procName)
     41 {
     42     unsigned internalIndex = FindGLXFunction(procName);
     43 
     44     return __glXDispatchFunctions[internalIndex];
     45 }
     46 
     47 static void __glXGLVNDSetDispatchIndex(const GLubyte *procName, int index)
     48 {
     49     unsigned internalIndex = FindGLXFunction(procName);
     50 
     51     if (internalIndex == DI_FUNCTION_COUNT)
     52         return; /* unknown or static dispatch */
     53 
     54     __glXDispatchTableIndices[internalIndex] = index;
     55 }
     56 
     57 _X_EXPORT Bool __glx_Main(uint32_t version, const __GLXapiExports *exports,
     58                           __GLXvendorInfo *vendor, __GLXapiImports *imports)
     59 {
     60     static Bool initDone = False;
     61 
     62     if (GLX_VENDOR_ABI_GET_MAJOR_VERSION(version) !=
     63         GLX_VENDOR_ABI_MAJOR_VERSION ||
     64         GLX_VENDOR_ABI_GET_MINOR_VERSION(version) <
     65         GLX_VENDOR_ABI_MINOR_VERSION)
     66         return False;
     67 
     68     if (!initDone) {
     69         initDone = True;
     70         __glXGLVNDAPIExports = exports;
     71 
     72         imports->isScreenSupported = __glXGLVNDIsScreenSupported;
     73         imports->getProcAddress = __glXGLVNDGetProcAddress;
     74         imports->getDispatchAddress = __glXGLVNDGetDispatchAddress;
     75         imports->setDispatchIndex = __glXGLVNDSetDispatchIndex;
     76         imports->notifyError = NULL;
     77         imports->isPatchSupported = NULL;
     78         imports->initiatePatch = NULL;
     79     }
     80 
     81     return True;
     82 }
     83