1 files changed, 155 insertions, 0 deletions
diff --git a/libs/hwui/renderthread/DrawFrameTask.cpp b/libs/hwui/renderthread/DrawFrameTask.cpp
new file mode 100644
index 000000000000..372d0d0084d6
--- /dev/null
+++ b/libs/hwui/renderthread/DrawFrameTask.cpp
@@ -0,0 +1,155 @@
+/*
+ * 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), mTaskMode(MODE_INVALID), mRenderNode(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::setRenderNode(RenderNode* renderNode) {
+    LOG_ALWAYS_FATAL_IF(!mContext, "Lifecycle violation, there's no context to setRenderNode with!");
+
+    mRenderNode = renderNode;
+}
+
+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(!mRenderNode.get(), "Cannot drawFrame with no render node!");
+    LOG_ALWAYS_FATAL_IF(!mContext, "Cannot drawFrame with no CanvasContext!");
+
+    postAndWait(renderThread, MODE_FULL);
+
+    // Reset the single-frame data
+    mDirty.setEmpty();
+    mRenderNode = 0;
+}
+
+void DrawFrameTask::flushStateChanges(RenderThread* renderThread) {
+    LOG_ALWAYS_FATAL_IF(!mContext, "Cannot drawFrame with no CanvasContext!");
+
+    postAndWait(renderThread, MODE_STATE_ONLY);
+}
+
+void DrawFrameTask::postAndWait(RenderThread* renderThread, TaskMode mode) {
+    LOG_ALWAYS_FATAL_IF(mode == MODE_INVALID, "That's not a real mode, silly!");
+
+    mTaskMode = mode;
+    AutoMutex _lock(mLock);
+    renderThread->queue(this);
+    mSignal.wait(mLock);
+}
+
+void DrawFrameTask::run() {
+    ATRACE_NAME("DrawFrame");
+
+    // canUnblockUiThread is temporary until WebView has a solution for syncing frame state
+    bool canUnblockUiThread = syncFrameState();
+
+    if (mTaskMode == MODE_STATE_ONLY) {
+        unblockUiThread();
+        return;
+    }
+
+    // Grab a copy of everything we need
+    Rect dirtyCopy(mDirty);
+    sp<RenderNode> renderNode = mRenderNode;
+    CanvasContext* context = mContext;
+
+    // From this point on anything in "this" is *UNSAFE TO ACCESS*
+    if (canUnblockUiThread) {
+        unblockUiThread();
+    }
+
+    drawRenderNode(context, renderNode.get(), &dirtyCopy);
+
+    if (!canUnblockUiThread) {
+        unblockUiThread();
+    }
+}
+
+bool DrawFrameTask::syncFrameState() {
+    ATRACE_CALL();
+
+    bool hasFunctors = false;
+    mContext->processLayerUpdates(&mLayers, &hasFunctors);
+
+    // If we don't have an mRenderNode this is a state flush only
+    if (mRenderNode.get()) {
+        TreeInfo info = {0};
+        mRenderNode->prepareTree(info);
+        hasFunctors |= info.hasFunctors;
+    }
+
+    return !hasFunctors;
+}
+
+void DrawFrameTask::unblockUiThread() {
+    AutoMutex _lock(mLock);
+    mSignal.signal();
+}
+
+void DrawFrameTask::drawRenderNode(CanvasContext* context, RenderNode* renderNode, Rect* dirty) {
+    ATRACE_CALL();
+
+    if (dirty->bottom == -1 && dirty->left == -1
+            && dirty->top == -1 && dirty->right == -1) {
+        dirty = 0;
+    }
+    context->drawDisplayList(renderNode, dirty);
+}
+
+} /* namespace renderthread */
+} /* namespace uirenderer */
+} /* namespace android */