Add SkiaVk backend to RenderEngine

This CL adds a new backend, SkiaVk, to RenderEngine.

The new functionality is to create a Vulkan device/instance (possibly
protected) and handle flush/waitFence via VkSemaphores fed to
GrBackendSemaphores.

+ make ctors of GLES/Vk RE's private so as to ensure GrContexts are
  created

Test: atest librenderengine_test
Bug: 236390072

Change-Id: I69119623b194885bcc4cf2ddc8e592576b713b19

1 files changed, 8 insertions, 2 deletions

diff --git a/libs/gui/SyncFeatures.cpp b/libs/gui/SyncFeatures.cpp
index 1a8fc1a00a..2d863c2585 100644
--- a/libs/gui/SyncFeatures.cpp
+++ b/libs/gui/SyncFeatures.cpp
@@ -36,8 +36,12 @@ SyncFeatures::SyncFeatures() : Singleton<SyncFeatures>(),
         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.
+    // eglQueryString can only be called after EGL has been initialized;
+    // otherwise the check below will abort.  If RenderEngine is using SkiaVk,
+    // EGL will not have been initialized.  There's no problem with initializing
+    // it again here (it is ref counted), and then terminating it later.
+    EGLBoolean initialized = eglInitialize(dpy, nullptr, nullptr);
+    LOG_ALWAYS_FATAL_IF(!initialized, "eglInitialize failed");
     const char* exts = eglQueryString(dpy, EGL_EXTENSIONS);
     LOG_ALWAYS_FATAL_IF(exts == nullptr, "eglQueryString failed");
     if (strstr(exts, "EGL_ANDROID_native_fence_sync")) {
@@ -63,6 +67,8 @@ SyncFeatures::SyncFeatures() : Singleton<SyncFeatures>(),
         mString.append(" EGL_KHR_wait_sync");
     }
     mString.append("]");
+    // Terminate EGL to match the eglInitialize above
+    eglTerminate(dpy);
 }
 
 bool SyncFeatures::useNativeFenceSync() const {