src/glx/glxglvnd.c

   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 }