1 /*
2 * Copyright (C) 2016 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 #include "SkiaDisplayList.h"
18
19 #include "renderthread/CanvasContext.h"
20 #include "VectorDrawable.h"
21 #include "DumpOpsCanvas.h"
22
23 #include <SkImagePriv.h>
24
25
26 namespace android {
27 namespace uirenderer {
28 namespace skiapipeline {
29
syncContents()30 void SkiaDisplayList::syncContents() {
31 for (auto& functor : mChildFunctors) {
32 functor.syncFunctor();
33 }
34 for (auto& vectorDrawable : mVectorDrawables) {
35 vectorDrawable->syncProperties();
36 }
37 }
38
reuseDisplayList(RenderNode * node,renderthread::CanvasContext * context)39 bool SkiaDisplayList::reuseDisplayList(RenderNode* node, renderthread::CanvasContext* context) {
40 reset();
41 node->attachAvailableList(this);
42 return true;
43 }
44
updateChildren(std::function<void (RenderNode *)> updateFn)45 void SkiaDisplayList::updateChildren(std::function<void(RenderNode*)> updateFn) {
46 for (auto& child : mChildNodes) {
47 updateFn(child.getRenderNode());
48 }
49 }
50
prepareListAndChildren(TreeObserver & observer,TreeInfo & info,bool functorsNeedLayer,std::function<void (RenderNode *,TreeObserver &,TreeInfo &,bool)> childFn)51 bool SkiaDisplayList::prepareListAndChildren(TreeObserver& observer, TreeInfo& info,
52 bool functorsNeedLayer,
53 std::function<void(RenderNode*, TreeObserver&, TreeInfo&, bool)> childFn) {
54 // If the prepare tree is triggered by the UI thread and no previous call to
55 // pinImages has failed then we must pin all mutable images in the GPU cache
56 // until the next UI thread draw.
57 if (info.prepareTextures && !info.canvasContext.pinImages(mMutableImages)) {
58 // In the event that pinning failed we prevent future pinImage calls for the
59 // remainder of this tree traversal and also unpin any currently pinned images
60 // to free up GPU resources.
61 info.prepareTextures = false;
62 info.canvasContext.unpinImages();
63 }
64
65 bool hasBackwardProjectedNodesHere = false;
66 bool hasBackwardProjectedNodesSubtree= false;
67
68 for (auto& child : mChildNodes) {
69 hasBackwardProjectedNodesHere |= child.getNodeProperties().getProjectBackwards();
70 RenderNode* childNode = child.getRenderNode();
71 Matrix4 mat4(child.getRecordedMatrix());
72 info.damageAccumulator->pushTransform(&mat4);
73 // TODO: a layer is needed if the canvas is rotated or has a non-rect clip
74 info.hasBackwardProjectedNodes = false;
75 childFn(childNode, observer, info, functorsNeedLayer);
76 hasBackwardProjectedNodesSubtree |= info.hasBackwardProjectedNodes;
77 info.damageAccumulator->popTransform();
78 }
79
80 //The purpose of next block of code is to reset projected display list if there are no
81 //backward projected nodes. This speeds up drawing, by avoiding an extra walk of the tree
82 if (mProjectionReceiver) {
83 mProjectionReceiver->setProjectedDisplayList(hasBackwardProjectedNodesSubtree ? this : nullptr);
84 info.hasBackwardProjectedNodes = hasBackwardProjectedNodesHere;
85 } else {
86 info.hasBackwardProjectedNodes = hasBackwardProjectedNodesSubtree
87 || hasBackwardProjectedNodesHere;
88 }
89
90 bool isDirty = false;
91 for (auto& vectorDrawable : mVectorDrawables) {
92 // If any vector drawable in the display list needs update, damage the node.
93 if (vectorDrawable->isDirty()) {
94 isDirty = true;
95 }
96 vectorDrawable->setPropertyChangeWillBeConsumed(true);
97 }
98 return isDirty;
99 }
100
reset()101 void SkiaDisplayList::reset() {
102 mProjectionReceiver = nullptr;
103
104 mDisplayList.reset();
105
106 mMutableImages.clear();
107 mVectorDrawables.clear();
108 mChildFunctors.clear();
109 mChildNodes.clear();
110
111 projectionReceiveIndex = -1;
112 allocator.~LinearAllocator();
113 new (&allocator) LinearAllocator();
114 }
115
output(std::ostream & output,uint32_t level)116 void SkiaDisplayList::output(std::ostream& output, uint32_t level) {
117 DumpOpsCanvas canvas(output, level, *this);
118 mDisplayList.draw(&canvas);
119 }
120
121 }; // namespace skiapipeline
122 }; // namespace uirenderer
123 }; // namespace android
124