Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 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 | #pragma once |
| 18 | |
| 19 | #include <SkCanvas.h> |
| 20 | #include <SkDrawable.h> |
| 21 | #include <SkMatrix.h> |
| 22 | #include <utils/RefBase.h> |
| 23 | |
| 24 | namespace android { |
| 25 | namespace uirenderer { |
| 26 | |
| 27 | class RenderNode; |
| 28 | class RenderProperties; |
| 29 | |
| 30 | namespace skiapipeline { |
| 31 | |
Stan Iliev | db45a4b | 2016-11-08 14:18:31 -0500 | [diff] [blame] | 32 | class SkiaDisplayList; |
| 33 | |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 34 | /** |
| 35 | * This drawable wraps a RenderNode and enables it to be recorded into a list |
| 36 | * of Skia drawing commands. |
| 37 | */ |
| 38 | class RenderNodeDrawable : public SkDrawable { |
| 39 | public: |
| 40 | /** |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 41 | * Creates a new RenderNodeDrawable backed by a render node. |
| 42 | * |
| 43 | * @param node that has to be drawn |
| 44 | * @param canvas is a recording canvas used to extract its matrix |
| 45 | * @param composeLayer if the node's layer type is RenderLayer this flag determines whether |
| 46 | * we should draw into the contents of the layer or compose the existing contents of the |
| 47 | * layer into the canvas. |
| 48 | */ |
Stan Iliev | 2f06e8a | 2016-11-02 15:29:03 -0400 | [diff] [blame] | 49 | explicit RenderNodeDrawable(RenderNode* node, SkCanvas* canvas, bool composeLayer = true, |
John Reck | 1bcacfd | 2017-11-03 10:12:19 -0700 | [diff] [blame] | 50 | bool inReorderingSection = false) |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 51 | : mRenderNode(node) |
| 52 | , mRecordedTransform(canvas->getTotalMatrix()) |
Stan Iliev | 2f06e8a | 2016-11-02 15:29:03 -0400 | [diff] [blame] | 53 | , mComposeLayer(composeLayer) |
| 54 | , mInReorderingSection(inReorderingSection) {} |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 55 | |
| 56 | /** |
| 57 | * Draws into the canvas this render node and its children. If the node is marked as a |
| 58 | * projection receiver then all projected children (excluding direct children) will be drawn |
| 59 | * last. Any projected node not matching those requirements will not be drawn by this function. |
| 60 | */ |
| 61 | void forceDraw(SkCanvas* canvas); |
| 62 | |
| 63 | /** |
| 64 | * Returns readonly render properties for this render node. |
| 65 | */ |
| 66 | const RenderProperties& getNodeProperties() const; |
| 67 | |
| 68 | /** |
| 69 | * The renderNode (and its properties) that is to be drawn |
| 70 | */ |
| 71 | RenderNode* getRenderNode() const { return mRenderNode.get(); } |
| 72 | |
| 73 | /** |
| 74 | * Returns the transform on the canvas at time of recording and is used for |
| 75 | * computing total transform without rerunning DL contents. |
| 76 | */ |
| 77 | const SkMatrix& getRecordedMatrix() const { return mRecordedTransform; } |
| 78 | |
Stan Iliev | db45a4b | 2016-11-08 14:18:31 -0500 | [diff] [blame] | 79 | /** |
| 80 | * Sets a pointer to a display list of the parent render node. The display list is used when |
| 81 | * drawing backward projected nodes, when this node is a projection receiver. |
| 82 | */ |
| 83 | void setProjectedDisplayList(SkiaDisplayList* projectedDisplayList) { |
| 84 | mProjectedDisplayList = projectedDisplayList; |
| 85 | } |
| 86 | |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 87 | protected: |
| 88 | /* |
| 89 | * Return the (conservative) bounds of what the drawable will draw. |
| 90 | */ |
| 91 | virtual SkRect onGetBounds() override { |
| 92 | // We don't want to enable a record time quick reject because the properties |
| 93 | // of the RenderNode may be updated on subsequent frames. |
| 94 | return SkRect::MakeLargest(); |
| 95 | } |
| 96 | /** |
| 97 | * This function draws into a canvas as forceDraw, but does nothing if the render node has a |
| 98 | * non-zero elevation. |
| 99 | */ |
| 100 | virtual void onDraw(SkCanvas* canvas) override; |
| 101 | |
| 102 | private: |
| 103 | /* |
| 104 | * Render node that is wrapped by this class. |
| 105 | */ |
| 106 | sp<RenderNode> mRenderNode; |
| 107 | |
| 108 | /** |
Stan Iliev | db45a4b | 2016-11-08 14:18:31 -0500 | [diff] [blame] | 109 | * Walks recursively the display list and draws the content of backward projected nodes. |
| 110 | * |
| 111 | * @param canvas used to draw the backward projected nodes |
| 112 | * @param displayList is a display list that contains a projection receiver |
| 113 | * @param nestLevel should be always 0. Used to track how far we are from the receiver. |
| 114 | */ |
| 115 | void drawBackwardsProjectedNodes(SkCanvas* canvas, const SkiaDisplayList& displayList, |
John Reck | 1bcacfd | 2017-11-03 10:12:19 -0700 | [diff] [blame] | 116 | int nestLevel = 0); |
Stan Iliev | db45a4b | 2016-11-08 14:18:31 -0500 | [diff] [blame] | 117 | |
| 118 | /** |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 119 | * Applies the rendering properties of a view onto a SkCanvas. |
| 120 | */ |
| 121 | static void setViewProperties(const RenderProperties& properties, SkCanvas* canvas, |
John Reck | 1bcacfd | 2017-11-03 10:12:19 -0700 | [diff] [blame] | 122 | float* alphaMultiplier); |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 123 | |
| 124 | /** |
| 125 | * Stores transform on the canvas at time of recording and is used for |
| 126 | * computing total transform without rerunning DL contents. |
| 127 | */ |
| 128 | const SkMatrix mRecordedTransform; |
| 129 | |
| 130 | /** |
| 131 | * If mRenderNode's layer type is RenderLayer this flag determines whether we |
| 132 | * should draw into the contents of the layer or compose the existing contents |
| 133 | * of the layer into the canvas. |
| 134 | */ |
| 135 | const bool mComposeLayer; |
| 136 | |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 137 | /* |
Stan Iliev | 2f06e8a | 2016-11-02 15:29:03 -0400 | [diff] [blame] | 138 | * True if the render node is in a reordering section |
| 139 | */ |
| 140 | bool mInReorderingSection; |
| 141 | |
| 142 | /* |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 143 | * Draw the content into a canvas, depending on the render node layer type and mComposeLayer. |
| 144 | */ |
| 145 | void drawContent(SkCanvas* canvas) const; |
Stan Iliev | db45a4b | 2016-11-08 14:18:31 -0500 | [diff] [blame] | 146 | |
| 147 | /* |
| 148 | * display list that is searched for any render nodes with getProjectBackwards==true |
| 149 | */ |
| 150 | SkiaDisplayList* mProjectedDisplayList = nullptr; |
Stan Iliev | 021693b | 2016-10-17 16:26:15 -0400 | [diff] [blame] | 151 | }; |
| 152 | |
John Reck | 1bcacfd | 2017-11-03 10:12:19 -0700 | [diff] [blame] | 153 | }; // namespace skiapipeline |
| 154 | }; // namespace uirenderer |
| 155 | }; // namespace android |