Start RenderThread earlier to preload Vulkan/EGL drivers

This CL should fix application startup regression for Vulkan
detected by "Hermetic Startup: EmptyActivity" test.
EGL drivers are loaded in a temp thread to leave more time
in RenderThread for other work. Loading EGL drivers
on the RenderThread may cause a perf regression.

Test: Ran cold-dropcache-test test.
Bug: 122659224
Bug: 123361175
Change-Id: I8ca818e98fac196a41d079be15594caca5cb1bab

1 files changed, 12 insertions, 3 deletions

diff --git a/libs/hwui/renderthread/RenderThread.cpp b/libs/hwui/renderthread/RenderThread.cpp
index bfae80f4698a..08edd20c0a0d 100644
--- a/libs/hwui/renderthread/RenderThread.cpp
+++ b/libs/hwui/renderthread/RenderThread.cpp
@@ -41,6 +41,7 @@
 #include <utils/Condition.h>
 #include <utils/Log.h>
 #include <utils/Mutex.h>
+#include <thread>
 
 namespace android {
 namespace uirenderer {
@@ -175,9 +176,6 @@ void RenderThread::initThreadLocals() {
     mRenderState = new RenderState(*this);
     mVkManager = new VulkanManager();
     mCacheManager = new CacheManager(mDisplayInfo);
-    if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaVulkan) {
-        requireVkContext();
-    }
 }
 
 void RenderThread::requireGlContext() {
@@ -409,6 +407,17 @@ bool RenderThread::isCurrent() {
     return gettid() == getInstance().getTid();
 }
 
+void RenderThread::preload() {
+    std::thread eglInitThread([]() {
+        //TODO: don't load EGL drivers for Vulkan, when HW bitmap uploader is refactored.
+        eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    });
+    eglInitThread.detach();
+    if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaVulkan) {
+        requireVkContext();
+    }
+}
+
 } /* namespace renderthread */
 } /* namespace uirenderer */
 } /* namespace android */