SyncFeatures::SyncFeatures() : Singleton<SyncFeatures>(),
mHasNativeFenceSync(false),
mHasFenceSync(false),
mHasWaitSync(false) {
EGLDisplay dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
// This can only be called after EGL has been initialized; otherwise the
// check below will abort.
const char* exts = eglQueryStringImplementationANDROID(dpy, EGL_EXTENSIONS);
LOG_ALWAYS_FATAL_IF(exts == NULL, "eglQueryStringImplementationANDROID failed");
if (strstr(exts, "EGL_ANDROID_native_fence_sync")) {
// This makes GLConsumer use the EGL_ANDROID_native_fence_sync
// extension to create Android native fences to signal when all
// GLES reads for a given buffer have completed.
mHasNativeFenceSync = true;
}
if (strstr(exts, "EGL_KHR_fence_sync")) {
mHasFenceSync = true;
}
if (strstr(exts, "EGL_KHR_wait_sync")) {
mHasWaitSync = true;
}
mString.append("[using:");
if (useNativeFenceSync()) {
mString.append(" EGL_ANDROID_native_fence_sync");
}
if (useFenceSync()) {
mString.append(" EGL_KHR_fence_sync");
}
if (useWaitSync()) {
mString.append(" EGL_KHR_wait_sync");
}
mString.append("]");
}
static bool hasEglAndroidImageCropImpl() {
EGLDisplay dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
const char* exts = eglQueryStringImplementationANDROID(dpy, EGL_EXTENSIONS);
size_t cropExtLen = strlen(CROP_EXT_STR);
size_t extsLen = strlen(exts);
bool equal = !strcmp(CROP_EXT_STR, exts);
bool atStart = !strncmp(CROP_EXT_STR " ", exts, cropExtLen+1);
bool atEnd = (cropExtLen+1) < extsLen &&
!strcmp(" " CROP_EXT_STR, exts + extsLen - (cropExtLen+1));
bool inMiddle = strstr(exts, " " CROP_EXT_STR " ");
return equal || atStart || atEnd || inMiddle;
}