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 
10 static const __EGLapiExports *__eglGLVNDApiExports = NULL;
11 
12 static 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 
24 static const char *
25 __eglGLVNDGetVendorString(int name)
26 {
27    if (name == __EGL_VENDOR_STRING_PLATFORM_EXTENSIONS)
28       return _eglGlobal.PlatformExtensionString;
29 
30    return NULL;
31 }
32 
33 static EGLDisplay
34 __eglGLVNDGetPlatformDisplay(EGLenum platform, void *native_display,
35       const EGLAttrib *attrib_list)
36 {
37    if (platform == EGL_NONE) {
38       assert(native_display == (void *) EGL_DEFAULT_DISPLAY);
39       assert(attrib_list == NULL);
40       return eglGetDisplay((EGLNativeDisplayType) native_display);
41    } else {
42       return eglGetPlatformDisplay(platform, native_display, attrib_list);
43    }
44 }
45 
46 static void *
47 __eglGLVNDGetProcAddress(const char *procName)
48 {
49    if (strcmp(procName, "eglQueryString") == 0)
50       return (void *) __eglGLVNDQueryString;
51 
52    return (void *) eglGetProcAddress(procName);
53 }
54 
55 EGLAPI EGLBoolean
56 __egl_Main(uint32_t version, const __EGLapiExports *exports,
57      __EGLvendorInfo *vendor, __EGLapiImports *imports)
58 {
59    if (EGL_VENDOR_ABI_GET_MAJOR_VERSION(version) !=
60        EGL_VENDOR_ABI_MAJOR_VERSION)
61       return EGL_FALSE;
62 
63    __eglGLVNDApiExports = exports;
64    __eglInitDispatchStubs(exports);
65 
66    imports->getPlatformDisplay = __eglGLVNDGetPlatformDisplay;
67    imports->getSupportsAPI = _eglIsApiValid;
68    imports->getVendorString = __eglGLVNDGetVendorString;
69    imports->getProcAddress = __eglGLVNDGetProcAddress;
70    imports->getDispatchAddress = __eglDispatchFindDispatchFunction;
71    imports->setDispatchIndex = __eglSetDispatchIndex;
72 
73    return EGL_TRUE;
74 }
75 
76