1 files changed, 126 insertions, 0 deletions
diff --git a/libs/hwui/renderthread/DrawFrameTask.cpp b/libs/hwui/renderthread/DrawFrameTask.cpp
new file mode 100644
index 000000000000..ff4be715808c
--- /dev/null
+++ b/libs/hwui/renderthread/DrawFrameTask.cpp
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2014 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 ATRACE_TAG ATRACE_TAG_VIEW
+
+#include "DrawFrameTask.h"
+
+#include <utils/Log.h>
+#include <utils/Trace.h>
+
+#include "../DisplayList.h"
+#include "../RenderNode.h"
+#include "CanvasContext.h"
+#include "RenderThread.h"
+
+namespace android {
+namespace uirenderer {
+namespace renderthread {
+
+DrawFrameTask::DrawFrameTask() : mContext(0) {
+}
+
+DrawFrameTask::~DrawFrameTask() {
+}
+
+void DrawFrameTask::setContext(CanvasContext* context) {
+    mContext = context;
+}
+
+void DrawFrameTask::addLayer(DeferredLayerUpdater* layer) {
+    LOG_ALWAYS_FATAL_IF(!mContext, "Lifecycle violation, there's no context to addLayer with!");
+
+    mLayers.push(layer);
+}
+
+void DrawFrameTask::removeLayer(DeferredLayerUpdater* layer) {
+    for (size_t i = 0; i < mLayers.size(); i++) {
+        if (mLayers[i] == layer) {
+            mLayers.removeAt(i);
+            break;
+        }
+    }
+}
+
+void DrawFrameTask::setDirty(int left, int top, int right, int bottom) {
+    mDirty.set(left, top, right, bottom);
+}
+
+void DrawFrameTask::drawFrame(RenderThread* renderThread) {
+    LOG_ALWAYS_FATAL_IF(!mContext, "Cannot drawFrame with no CanvasContext!");
+
+    postAndWait(renderThread);
+
+    // Reset the single-frame data
+    mDirty.setEmpty();
+}
+
+void DrawFrameTask::postAndWait(RenderThread* renderThread) {
+    AutoMutex _lock(mLock);
+    renderThread->queue(this);
+    mSignal.wait(mLock);
+}
+
+void DrawFrameTask::run() {
+    ATRACE_NAME("DrawFrame");
+
+    bool canUnblockUiThread = syncFrameState();
+
+    // Grab a copy of everything we need
+    Rect dirty(mDirty);
+    CanvasContext* context = mContext;
+
+    // From this point on anything in "this" is *UNSAFE TO ACCESS*
+    if (canUnblockUiThread) {
+        unblockUiThread();
+    }
+
+    context->draw(&dirty);
+
+    if (!canUnblockUiThread) {
+        unblockUiThread();
+    }
+}
+
+static void initTreeInfo(TreeInfo& info) {
+    info.prepareTextures = true;
+    info.performStagingPush = true;
+    info.evaluateAnimations = true;
+    // TODO: Get this from Choreographer
+    nsecs_t frameTimeNs = systemTime(CLOCK_MONOTONIC);
+    info.frameTimeMs = nanoseconds_to_milliseconds(frameTimeNs);
+}
+
+bool DrawFrameTask::syncFrameState() {
+    ATRACE_CALL();
+    mContext->makeCurrent();
+    Caches::getInstance().textureCache.resetMarkInUse();
+    TreeInfo info;
+    initTreeInfo(info);
+    mContext->processLayerUpdates(&mLayers, info);
+    mContext->prepareTree(info);
+    // If prepareTextures is false, we ran out of texture cache space
+    return !info.hasFunctors && info.prepareTextures;
+}
+
+void DrawFrameTask::unblockUiThread() {
+    AutoMutex _lock(mLock);
+    mSignal.signal();
+}
+
+} /* namespace renderthread */
+} /* namespace uirenderer */
+} /* namespace android */