1#include <string.h>
2#include <assert.h>
3
4#include <glvnd/libeglabi.h>
5
6#include "eglcurrent.h"
7#include "egldispatchstubs.h"
8#include "eglglobals.h"
9
10static const __EGLapiExports *__eglGLVNDApiExports = NULL;
11
12static const char * EGLAPIENTRY
13__eglGLVNDQueryString(EGLDisplay dpy, EGLenum name)
14{
15   // For client extensions, return the list of non-platform extensions. The
16   // platform extensions are returned by __eglGLVNDGetVendorString.
17   if (dpy == EGL_NO_DISPLAY && name == EGL_EXTENSIONS)
18      return _eglGlobal.ClientOnlyExtensionString;
19
20   // For everything else, forward to the normal eglQueryString function.
21   return eglQueryString(dpy, name);
22}
23
24static const char *
25__eglGLVNDGetVendorString(int name)
26{
27   if (name == __EGL_VENDOR_STRING_PLATFORM_EXTENSIONS) {
28      const char *str = _eglGlobal.PlatformExtensionString;
29      // The platform extension string may have a leading space. If it does,
30      // then skip over it.
31      while (*str == ' ') {
32         str++;
33      }
34      return str;
35   }
36
37   return NULL;
38}
39
40static EGLDisplay
41__eglGLVNDGetPlatformDisplay(EGLenum platform, void *native_display,
42      const EGLAttrib *attrib_list)
43{
44   if (platform == EGL_NONE) {
45      assert(native_display == (void *) EGL_DEFAULT_DISPLAY);
46      assert(attrib_list == NULL);
47      return eglGetDisplay((EGLNativeDisplayType) native_display);
48   } else {
49      return eglGetPlatformDisplay(platform, native_display, attrib_list);
50   }
51}
52
53static void *
54__eglGLVNDGetProcAddress(const char *procName)
55{
56   if (strcmp(procName, "eglQueryString") == 0)
57      return (void *) __eglGLVNDQueryString;
58
59   return (void *) eglGetProcAddress(procName);
60}
61
62EGLAPI EGLBoolean
63__egl_Main(uint32_t version, const __EGLapiExports *exports,
64     __EGLvendorInfo *vendor, __EGLapiImports *imports)
65{
66   if (EGL_VENDOR_ABI_GET_MAJOR_VERSION(version) !=
67       EGL_VENDOR_ABI_MAJOR_VERSION)
68      return EGL_FALSE;
69
70   __eglGLVNDApiExports = exports;
71   __eglInitDispatchStubs(exports);
72
73   imports->getPlatformDisplay = __eglGLVNDGetPlatformDisplay;
74   imports->getSupportsAPI = _eglIsApiValid;
75   imports->getVendorString = __eglGLVNDGetVendorString;
76   imports->getProcAddress = __eglGLVNDGetProcAddress;
77   imports->getDispatchAddress = __eglDispatchFindDispatchFunction;
78   imports->setDispatchIndex = __eglSetDispatchIndex;
79
80   return EGL_TRUE;
81}
82
83