DrawFrameTask.cpp revision 860d155f866cc15a725e7ce03763280987f24901
1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define ATRACE_TAG ATRACE_TAG_VIEW 18 19#include "DrawFrameTask.h" 20 21#include <utils/Log.h> 22#include <utils/Trace.h> 23 24#include "../DisplayList.h" 25#include "../RenderNode.h" 26#include "CanvasContext.h" 27#include "RenderThread.h" 28 29namespace android { 30namespace uirenderer { 31namespace renderthread { 32 33DrawFrameTask::DrawFrameTask() : mContext(0), mRenderNode(0) { 34} 35 36DrawFrameTask::~DrawFrameTask() { 37} 38 39void DrawFrameTask::setContext(CanvasContext* context) { 40 mContext = context; 41} 42 43void DrawFrameTask::addLayer(DeferredLayerUpdater* layer) { 44 LOG_ALWAYS_FATAL_IF(!mContext, "Lifecycle violation, there's no context to addLayer with!"); 45 46 mLayers.push(layer); 47} 48 49void DrawFrameTask::removeLayer(DeferredLayerUpdater* layer) { 50 for (size_t i = 0; i < mLayers.size(); i++) { 51 if (mLayers[i] == layer) { 52 mLayers.removeAt(i); 53 break; 54 } 55 } 56} 57 58void DrawFrameTask::setRenderNode(RenderNode* renderNode) { 59 LOG_ALWAYS_FATAL_IF(!mContext, "Lifecycle violation, there's no context to setRenderNode with!"); 60 61 mRenderNode = renderNode; 62} 63 64void DrawFrameTask::setDirty(int left, int top, int right, int bottom) { 65 mDirty.set(left, top, right, bottom); 66} 67 68void DrawFrameTask::drawFrame(RenderThread* renderThread) { 69 LOG_ALWAYS_FATAL_IF(!mRenderNode.get(), "Cannot drawFrame with no render node!"); 70 LOG_ALWAYS_FATAL_IF(!mContext, "Cannot drawFrame with no CanvasContext!"); 71 72 postAndWait(renderThread); 73 74 // Reset the single-frame data 75 mDirty.setEmpty(); 76 mRenderNode = 0; 77} 78 79void DrawFrameTask::postAndWait(RenderThread* renderThread) { 80 AutoMutex _lock(mLock); 81 renderThread->queue(this); 82 mSignal.wait(mLock); 83} 84 85void DrawFrameTask::run() { 86 ATRACE_NAME("DrawFrame"); 87 88 bool canUnblockUiThread = syncFrameState(); 89 90 // Grab a copy of everything we need 91 Rect dirtyCopy(mDirty); 92 sp<RenderNode> renderNode = mRenderNode; 93 CanvasContext* context = mContext; 94 95 // From this point on anything in "this" is *UNSAFE TO ACCESS* 96 if (canUnblockUiThread) { 97 unblockUiThread(); 98 } 99 100 drawRenderNode(context, renderNode.get(), &dirtyCopy); 101 102 if (!canUnblockUiThread) { 103 unblockUiThread(); 104 } 105} 106 107static void prepareTreeInfo(TreeInfo& info) { 108 info.prepareTextures = true; 109} 110 111bool DrawFrameTask::syncFrameState() { 112 ATRACE_CALL(); 113 mContext->makeCurrent(); 114 Caches::getInstance().textureCache.resetMarkInUse(); 115 TreeInfo info; 116 prepareTreeInfo(info); 117 mContext->processLayerUpdates(&mLayers, info); 118 mRenderNode->prepareTree(info); 119 // If prepareTextures is false, we ran out of texture cache space 120 return !info.hasFunctors && info.prepareTextures; 121} 122 123void DrawFrameTask::unblockUiThread() { 124 AutoMutex _lock(mLock); 125 mSignal.signal(); 126} 127 128void DrawFrameTask::drawRenderNode(CanvasContext* context, RenderNode* renderNode, Rect* dirty) { 129 ATRACE_CALL(); 130 131 if (dirty->bottom == -1 && dirty->left == -1 132 && dirty->top == -1 && dirty->right == -1) { 133 dirty = 0; 134 } 135 context->drawDisplayList(renderNode, dirty); 136} 137 138} /* namespace renderthread */ 139} /* namespace uirenderer */ 140} /* namespace android */ 141