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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 
__glXGLVNDIsScreenSupported(Display * dpy,int screen)9 static Bool __glXGLVNDIsScreenSupported(Display *dpy, int screen)
10 {
11     /* TODO: Think of a better heuristic... */
12     return True;
13 }
14 
__glXGLVNDGetProcAddress(const GLubyte * procName)15 static void *__glXGLVNDGetProcAddress(const GLubyte *procName)
16 {
17     return glXGetProcAddressARB(procName);
18 }
19 
20 static int
compare(const void * l,const void * r)21 compare(const void *l, const void *r)
22 {
23     const char *s = *(const char **)r;
24     return strcmp(l, s);
25 }
26 
FindGLXFunction(const GLubyte * name)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 
__glXGLVNDGetDispatchAddress(const GLubyte * procName)40 static void *__glXGLVNDGetDispatchAddress(const GLubyte *procName)
41 {
42     unsigned internalIndex = FindGLXFunction(procName);
43 
44     return __glXDispatchFunctions[internalIndex];
45 }
46 
__glXGLVNDSetDispatchIndex(const GLubyte * procName,int index)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 
__glx_Main(uint32_t version,const __GLXapiExports * exports,__GLXvendorInfo * vendor,__GLXapiImports * imports)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