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 OUTLINE_H 17 #define OUTLINE_H 18 19 #include <SkPath.h> 20 21 #include "Rect.h" 22 #include "utils/MathUtils.h" 23 24 namespace android { 25 namespace uirenderer { 26 27 class Outline { 28 public: 29 enum class Type { None = 0, Empty = 1, ConvexPath = 2, RoundRect = 3 }; 30 Outline()31 Outline() : mShouldClip(false), mType(Type::None), mRadius(0), mAlpha(0.0f) {} 32 setRoundRect(int left,int top,int right,int bottom,float radius,float alpha)33 void setRoundRect(int left, int top, int right, int bottom, float radius, float alpha) { 34 mAlpha = alpha; 35 if (mType == Type::RoundRect && left == mBounds.left && right == mBounds.right && 36 top == mBounds.top && bottom == mBounds.bottom && radius == mRadius) { 37 // nothing to change, don't do any work 38 return; 39 } 40 41 mType = Type::RoundRect; 42 mBounds.set(left, top, right, bottom); 43 mRadius = radius; 44 45 // Reuse memory if previous outline was the same shape (rect or round rect). 46 if (mPath.countVerbs() > 10) { 47 mPath.reset(); 48 } else { 49 mPath.rewind(); 50 } 51 52 // update mPath to reflect new outline 53 if (MathUtils::isPositive(radius)) { 54 mPath.addRoundRect(SkRect::MakeLTRB(left, top, right, bottom), radius, radius); 55 } else { 56 mPath.addRect(left, top, right, bottom); 57 } 58 } 59 setConvexPath(const SkPath * outline,float alpha)60 void setConvexPath(const SkPath* outline, float alpha) { 61 if (!outline) { 62 setEmpty(); 63 return; 64 } 65 mType = Type::ConvexPath; 66 mPath = *outline; 67 mBounds.set(outline->getBounds()); 68 mAlpha = alpha; 69 } 70 setEmpty()71 void setEmpty() { 72 mType = Type::Empty; 73 mPath.reset(); 74 mAlpha = 0.0f; 75 } 76 setNone()77 void setNone() { 78 mType = Type::None; 79 mPath.reset(); 80 mAlpha = 0.0f; 81 } 82 isEmpty()83 bool isEmpty() const { return mType == Type::Empty; } 84 getAlpha()85 float getAlpha() const { return mAlpha; } 86 setShouldClip(bool clip)87 void setShouldClip(bool clip) { mShouldClip = clip; } 88 getShouldClip()89 bool getShouldClip() const { return mShouldClip; } 90 willClip()91 bool willClip() const { 92 // only round rect outlines can be used for clipping 93 return mShouldClip && (mType == Type::RoundRect); 94 } 95 willRoundRectClip()96 bool willRoundRectClip() const { 97 // only round rect outlines can be used for clipping 98 return willClip() && MathUtils::isPositive(mRadius); 99 } 100 getAsRoundRect(Rect * outRect,float * outRadius)101 bool getAsRoundRect(Rect* outRect, float* outRadius) const { 102 if (mType == Type::RoundRect) { 103 outRect->set(mBounds); 104 *outRadius = mRadius; 105 return true; 106 } 107 return false; 108 } 109 getPath()110 const SkPath* getPath() const { 111 if (mType == Type::None || mType == Type::Empty) return nullptr; 112 113 return &mPath; 114 } 115 getType()116 Type getType() const { return mType; } 117 getBounds()118 const Rect& getBounds() const { return mBounds; } 119 getRadius()120 float getRadius() const { return mRadius; } 121 122 private: 123 bool mShouldClip; 124 Type mType; 125 Rect mBounds; 126 float mRadius; 127 float mAlpha; 128 SkPath mPath; 129 }; 130 131 } /* namespace uirenderer */ 132 } /* namespace android */ 133 134 #endif /* OUTLINE_H */ 135