Terminate EGL when an app goes in the background

This does not happen on high end gfx devices. This happens
only if only one EGL context is initialized in the current
process.

Change-Id: Ibd1737efdf84eef8a84108b05795440d1ae9964e

1 files changed, 35 insertions, 9 deletions

diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index 75b07de49b6c..f293cba652f5 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -46,22 +46,16 @@ namespace uirenderer {
 // Constructors/destructor
 ///////////////////////////////////////////////////////////////////////////////
 
-Caches::Caches(): Singleton<Caches>(), blend(false), lastSrcMode(GL_ZERO),
-        lastDstMode(GL_ZERO), currentProgram(NULL) {
+Caches::Caches(): Singleton<Caches>(), mInitialized(false) {
     GLint maxTextureUnits;
     glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
     if (maxTextureUnits < REQUIRED_TEXTURE_UNITS_COUNT) {
         LOGW("At least %d texture units are required!", REQUIRED_TEXTURE_UNITS_COUNT);
     }
 
-    glGenBuffers(1, &meshBuffer);
-    glBindBuffer(GL_ARRAY_BUFFER, meshBuffer);
-    glBufferData(GL_ARRAY_BUFFER, sizeof(gMeshVertices), gMeshVertices, GL_STATIC_DRAW);
-
     glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);
 
-    mCurrentBuffer = meshBuffer;
-    mRegionMesh = NULL;
+    init();
 
     mDebugLevel = readDebugLevel();
     LOGD("Enabling debug mode %d", mDebugLevel);
@@ -71,8 +65,40 @@ Caches::Caches(): Singleton<Caches>(), blend(false), lastSrcMode(GL_ZERO),
 #endif
 }
 
-Caches::~Caches() {
+void Caches::init() {
+    if (mInitialized) return;
+
+    glGenBuffers(1, &meshBuffer);
+    glBindBuffer(GL_ARRAY_BUFFER, meshBuffer);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(gMeshVertices), gMeshVertices, GL_STATIC_DRAW);
+
+    mCurrentBuffer = meshBuffer;
+    mRegionMesh = NULL;
+
+    blend = false;
+    lastSrcMode = GL_ZERO;
+    lastDstMode = GL_ZERO;
+    currentProgram = NULL;
+
+    mInitialized = true;
+}
+
+void Caches::terminate() {
+    if (!mInitialized) return;
+
+    glDeleteBuffers(1, &meshBuffer);
+    mCurrentBuffer = 0;
+
+    glDeleteBuffers(1, &mRegionMeshIndices);
     delete[] mRegionMesh;
+    mRegionMesh = NULL;
+
+    fboCache.clear();
+
+    programCache.clear();
+    currentProgram = NULL;
+
+    mInitialized = false;
 }
 
 ///////////////////////////////////////////////////////////////////////////////