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       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
  40 static 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
  53 static 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
  62 EGLAPI 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