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 #ifndef DAMAGEACCUMULATOR_H 17 #define DAMAGEACCUMULATOR_H 18 19 #include <cutils/compiler.h> 20 #include <utils/LinearAllocator.h> 21 22 #include <SkMatrix.h> 23 #include <SkRect.h> 24 #include <effects/StretchEffect.h> 25 26 #include "utils/Macros.h" 27 28 // Smaller than INT_MIN/INT_MAX because we offset these values 29 // and thus don't want to be adding offsets to INT_MAX, that's bad 30 #define DIRTY_MIN (-0x7ffffff - 1) 31 #define DIRTY_MAX (0x8000000) 32 33 namespace android { 34 namespace uirenderer { 35 36 struct DirtyStack; 37 class RenderNode; 38 class Matrix4; 39 40 class DamageAccumulator { 41 PREVENT_COPY_AND_ASSIGN(DamageAccumulator); 42 43 public: 44 DamageAccumulator(); 45 // mAllocator will clean everything up for us, no need for a dtor 46 47 // Push a transform node onto the stack. This should be called prior 48 // to any dirty() calls. Subsequent calls to dirty() 49 // will be affected by the transform when popTransform() is called. 50 void pushTransform(const RenderNode* transform); 51 void pushTransform(const Matrix4* transform); 52 53 // Pops a transform node from the stack, propagating the dirty rect 54 // up to the parent node. Returns the IDamageTransform that was just applied 55 void popTransform(); 56 57 void dirty(float left, float top, float right, float bottom); 58 59 // Returns the current dirty area, *NOT* transformed by pushed transforms 60 void peekAtDirty(SkRect* dest) const; 61 62 void computeCurrentTransform(Matrix4* outMatrix) const; 63 64 SkRect computeClipAndTransform(const SkRect& bounds, Matrix4* outMatrix) const; 65 66 void finish(SkRect* totalDirty); 67 68 struct StretchResult { 69 /** 70 * Stretch parameters configured on the stretch container 71 */ 72 const StretchEffect* stretchEffect; 73 74 /** 75 * Bounds of the stretching container 76 */ 77 const SkRect parentBounds; 78 79 /** 80 * Width of the stretch container 81 */ 82 const float width; 83 84 /** 85 * Height of the stretch container 86 */ 87 const float height; 88 }; 89 90 [[nodiscard]] StretchResult findNearestStretchEffect() const; 91 92 private: 93 void pushCommon(); 94 void applyMatrix4Transform(DirtyStack* frame); 95 void applyRenderNodeTransform(DirtyStack* frame); 96 97 LinearAllocator mAllocator; 98 DirtyStack* mHead; 99 }; 100 101 } /* namespace uirenderer */ 102 } /* namespace android */ 103 104 #endif /* DAMAGEACCUMULATOR_H */ 105