src/egl/main/eglglvnd.c

   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