EGL: implement loading and saving the cache

This change adds support for saving and loading the contents of the EGL
cache.  It also adds some simple tests for the EGL cache.

Change-Id: I18e5e789e0897a0783d29d1c1e64d26de2dd44c4

2 files changed, 114 insertions, 0 deletions

diff --git a/opengl/tests/EGLTest/Android.mk b/opengl/tests/EGLTest/Android.mk
index 92d7eb1..14104d1 100644
--- a/opengl/tests/EGLTest/Android.mk
+++ b/opengl/tests/EGLTest/Android.mk
@@ -7,6 +7,7 @@ LOCAL_MODULE := EGL_test
 LOCAL_MODULE_TAGS := tests
 
 LOCAL_SRC_FILES := \
+    egl_cache_test.cpp \
     EGL_test.cpp \
 
 LOCAL_SHARED_LIBRARIES := \
@@ -21,9 +22,12 @@ LOCAL_STATIC_LIBRARIES := \
 
 LOCAL_C_INCLUDES := \
     bionic \
+    bionic/libc/private \
     bionic/libstdc++/include \
     external/gtest/include \
     external/stlport/stlport \
+    frameworks/base/opengl/libs \
+    frameworks/base/opengl/libs/EGL \
 
 include $(BUILD_EXECUTABLE)
 
diff --git a/opengl/tests/EGLTest/egl_cache_test.cpp b/opengl/tests/EGLTest/egl_cache_test.cpp
new file mode 100644
index 0000000..c7d9e3e
--- /dev/null
+++ b/opengl/tests/EGLTest/egl_cache_test.cpp
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "EGL_test"
+//#define LOG_NDEBUG 0
+
+#include <gtest/gtest.h>
+
+#include <utils/Log.h>
+
+#include "egl_cache.h"
+#include "egl_display.h"
+
+namespace android {
+
+class EGLCacheTest : public ::testing::Test {
+protected:
+    virtual void SetUp() {
+        mCache = egl_cache_t::get();
+    }
+
+    virtual void TearDown() {
+        mCache->setCacheFilename("");
+        mCache->terminate();
+    }
+
+    egl_cache_t* mCache;
+};
+
+TEST_F(EGLCacheTest, UninitializedCacheAlwaysMisses) {
+    char buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    mCache->setBlob("abcd", 4, "efgh", 4);
+    ASSERT_EQ(0, mCache->getBlob("abcd", 4, buf, 4));
+    ASSERT_EQ(0xee, buf[0]);
+    ASSERT_EQ(0xee, buf[1]);
+    ASSERT_EQ(0xee, buf[2]);
+    ASSERT_EQ(0xee, buf[3]);
+}
+
+TEST_F(EGLCacheTest, InitializedCacheAlwaysHits) {
+    char buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
+    mCache->setBlob("abcd", 4, "efgh", 4);
+    ASSERT_EQ(4, mCache->getBlob("abcd", 4, buf, 4));
+    ASSERT_EQ('e', buf[0]);
+    ASSERT_EQ('f', buf[1]);
+    ASSERT_EQ('g', buf[2]);
+    ASSERT_EQ('h', buf[3]);
+}
+
+TEST_F(EGLCacheTest, TerminatedCacheAlwaysMisses) {
+    char buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
+    mCache->setBlob("abcd", 4, "efgh", 4);
+    mCache->terminate();
+    ASSERT_EQ(0, mCache->getBlob("abcd", 4, buf, 4));
+    ASSERT_EQ(0xee, buf[0]);
+    ASSERT_EQ(0xee, buf[1]);
+    ASSERT_EQ(0xee, buf[2]);
+    ASSERT_EQ(0xee, buf[3]);
+}
+
+class EGLCacheSerializationTest : public EGLCacheTest {
+
+protected:
+
+    virtual void SetUp() {
+        EGLCacheTest::SetUp();
+
+        char* tn = tempnam("/sdcard", "EGL_test-cache-");
+        mFilename = tn;
+        free(tn);
+    }
+
+    virtual void TearDown() {
+        unlink(mFilename.string());
+        EGLCacheTest::TearDown();
+    }
+
+    String8 mFilename;
+};
+
+TEST_F(EGLCacheSerializationTest, ReinitializedCacheContainsValues) {
+    char buf[4] = { 0xee, 0xee, 0xee, 0xee };
+    mCache->setCacheFilename(mFilename);
+    mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
+    mCache->setBlob("abcd", 4, "efgh", 4);
+    mCache->terminate();
+    mCache->initialize(egl_display_t::get(EGL_DEFAULT_DISPLAY));
+    ASSERT_EQ(4, mCache->getBlob("abcd", 4, buf, 4));
+    ASSERT_EQ('e', buf[0]);
+    ASSERT_EQ('f', buf[1]);
+    ASSERT_EQ('g', buf[2]);
+    ASSERT_EQ('h', buf[3]);
+}
+
+}