OpenGL: fix initializeAnglePlatform with built-in ANGLE driver

When ANGLE namespace doesn't exist and initializeAnglePlatform is
called, ANGLE driver is loaded as built-in gl driver in sphal namespace.
This change fixes the fallback path here.

Bug: 154237217
Test: atest CtsAngleIntegrationHostTestCases
Change-Id: I0e4ecf65fac0d91b5542d475439e1e6f9541b629
Merged-In: I0e4ecf65fac0d91b5542d475439e1e6f9541b629
(cherry picked from commit a7733136d6857a68ba7be39c46e087ed366d3d49)

1 files changed, 20 insertions, 5 deletions

diff --git a/opengl/libs/EGL/egl_angle_platform.cpp b/opengl/libs/EGL/egl_angle_platform.cpp
index 97dc0f1370..f82c2a4ee7 100644
--- a/opengl/libs/EGL/egl_angle_platform.cpp
+++ b/opengl/libs/EGL/egl_angle_platform.cpp
@@ -29,9 +29,13 @@
 #include <graphicsenv/GraphicsEnv.h>
 #include <time.h>
 #include <log/log.h>
+#include <vndksupport/linker.h>
 
 namespace angle {
 
+constexpr char kAngleEs2Lib[] = "libGLESv2_angle.so";
+constexpr int kAngleDlFlags = RTLD_LOCAL | RTLD_NOW;
+
 static GetDisplayPlatformFunc angleGetDisplayPlatform = nullptr;
 static ResetDisplayPlatformFunc angleResetDisplayPlatform = nullptr;
 
@@ -101,11 +105,22 @@ static void assignAnglePlatformMethods(PlatformMethods* platformMethods) {
 bool initializeAnglePlatform(EGLDisplay dpy) {
     // Since we're inside libEGL, use dlsym to lookup fptr for ANGLEGetDisplayPlatform
     android_namespace_t* ns = android::GraphicsEnv::getInstance().getAngleNamespace();
-    const android_dlextinfo dlextinfo = {
-            .flags = ANDROID_DLEXT_USE_NAMESPACE,
-            .library_namespace = ns,
-    };
-    void* so = android_dlopen_ext("libGLESv2_angle.so", RTLD_LOCAL | RTLD_NOW, &dlextinfo);
+    void* so = nullptr;
+    if (ns) {
+        const android_dlextinfo dlextinfo = {
+                .flags = ANDROID_DLEXT_USE_NAMESPACE,
+                .library_namespace = ns,
+        };
+        so = android_dlopen_ext(kAngleEs2Lib, kAngleDlFlags, &dlextinfo);
+    } else {
+        // If we are here, ANGLE is loaded as built-in gl driver in the sphal.
+        so = android_load_sphal_library(kAngleEs2Lib, kAngleDlFlags);
+    }
+    if (!so) {
+        ALOGE("%s failed to dlopen %s!", __FUNCTION__, kAngleEs2Lib);
+        return false;
+    }
+
     angleGetDisplayPlatform =
             reinterpret_cast<GetDisplayPlatformFunc>(dlsym(so, "ANGLEGetDisplayPlatform"));