1 files changed, 142 insertions, 0 deletions
diff --git a/libs/hwui/pipeline/skia/ShaderCache.cpp b/libs/hwui/pipeline/skia/ShaderCache.cpp
new file mode 100644
index 000000000000..2fa56f613144
--- /dev/null
+++ b/libs/hwui/pipeline/skia/ShaderCache.cpp
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#include "ShaderCache.h"
+#include <algorithm>
+#include <log/log.h>
+#include <thread>
+#include "FileBlobCache.h"
+#include "Properties.h"
+#include "utils/TraceUtils.h"
+
+namespace android {
+namespace uirenderer {
+namespace skiapipeline {
+
+// Cache size limits.
+static const size_t maxKeySize = 1024;
+static const size_t maxValueSize = 64 * 1024;
+static const size_t maxTotalSize = 512 * 1024;
+
+ShaderCache::ShaderCache() {
+    // There is an "incomplete FileBlobCache type" compilation error, if ctor is moved to header.
+}
+
+ShaderCache ShaderCache::sCache;
+
+ShaderCache& ShaderCache::get() {
+    return sCache;
+}
+
+void ShaderCache::initShaderDiskCache() {
+    ATRACE_NAME("initShaderDiskCache");
+    std::lock_guard<std::mutex> lock(mMutex);
+
+    // Emulators can switch between different renders either as part of config
+    // or snapshot migration. Also, program binaries may not work well on some
+    // desktop / laptop GPUs. Thus, disable the shader disk cache for emulator builds.
+    if (!Properties::runningInEmulator && mFilename.length() > 0) {
+        mBlobCache.reset(new FileBlobCache(maxKeySize, maxValueSize, maxTotalSize, mFilename));
+        mInitialized = true;
+    }
+}
+
+void ShaderCache::setFilename(const char* filename) {
+    std::lock_guard<std::mutex> lock(mMutex);
+    mFilename = filename;
+}
+
+BlobCache* ShaderCache::getBlobCacheLocked() {
+    LOG_ALWAYS_FATAL_IF(!mInitialized, "ShaderCache has not been initialized");
+    return mBlobCache.get();
+}
+
+sk_sp<SkData> ShaderCache::load(const SkData& key) {
+    ATRACE_NAME("ShaderCache::load");
+    size_t keySize = key.size();
+    std::lock_guard<std::mutex> lock(mMutex);
+    if (!mInitialized) {
+        return nullptr;
+    }
+
+    // mObservedBlobValueSize is reasonably big to avoid memory reallocation
+    // Allocate a buffer with malloc. SkData takes ownership of that allocation and will call free.
+    void* valueBuffer = malloc(mObservedBlobValueSize);
+    if (!valueBuffer) {
+        return nullptr;
+    }
+    BlobCache* bc = getBlobCacheLocked();
+    size_t valueSize = bc->get(key.data(), keySize, valueBuffer, mObservedBlobValueSize);
+    int maxTries = 3;
+    while (valueSize > mObservedBlobValueSize && maxTries > 0) {
+        mObservedBlobValueSize = std::min(valueSize, maxValueSize);
+        valueBuffer = realloc(valueBuffer, mObservedBlobValueSize);
+        if (!valueBuffer) {
+            return nullptr;
+        }
+        valueSize = bc->get(key.data(), keySize, valueBuffer, mObservedBlobValueSize);
+        maxTries--;
+    }
+    if (!valueSize) {
+        free(valueBuffer);
+        return nullptr;
+    }
+    if (valueSize > mObservedBlobValueSize) {
+        ALOGE("ShaderCache::load value size is too big %d", (int) valueSize);
+        free(valueBuffer);
+        return nullptr;
+    }
+    return SkData::MakeFromMalloc(valueBuffer, valueSize);
+}
+
+void ShaderCache::store(const SkData& key, const SkData& data) {
+    ATRACE_NAME("ShaderCache::store");
+    std::lock_guard<std::mutex> lock(mMutex);
+
+    if (!mInitialized) {
+        return;
+    }
+
+    size_t valueSize = data.size();
+    size_t keySize = key.size();
+    if (keySize == 0 || valueSize == 0 || valueSize >= maxValueSize) {
+        ALOGW("ShaderCache::store: sizes %d %d not allowed", (int)keySize, (int)valueSize);
+        return;
+    }
+
+    const void* value = data.data();
+
+    BlobCache* bc = getBlobCacheLocked();
+    bc->set(key.data(), keySize, value, valueSize);
+
+    if (!mSavePending && mDeferredSaveDelay > 0) {
+        mSavePending = true;
+        std::thread deferredSaveThread([this]() {
+            sleep(mDeferredSaveDelay);
+            std::lock_guard<std::mutex> lock(mMutex);
+            ATRACE_NAME("ShaderCache::saveToDisk");
+            if (mInitialized && mBlobCache) {
+                mBlobCache->writeToFile();
+            }
+            mSavePending = false;
+        });
+        deferredSaveThread.detach();
+    }
+}
+
+} /* namespace skiapipeline */
+} /* namespace uirenderer */
+} /* namespace android */