1 /* 2 * Copyright (C) 2012 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 #ifndef ANDROID_HWUI_PATH_RENDERER_H 18 #define ANDROID_HWUI_PATH_RENDERER_H 19 20 #include <utils/Vector.h> 21 22 #include "Vertex.h" 23 24 namespace android { 25 namespace uirenderer { 26 27 class Matrix4; 28 typedef Matrix4 mat4; 29 30 class VertexBuffer { 31 public: VertexBuffer()32 VertexBuffer(): 33 mBuffer(0), 34 mSize(0), 35 mCleanupMethod(0) 36 {} 37 ~VertexBuffer()38 ~VertexBuffer() { 39 if (mCleanupMethod) 40 mCleanupMethod(mBuffer); 41 } 42 43 template <class TYPE> alloc(int size)44 TYPE* alloc(int size) { 45 mSize = size; 46 mBuffer = (void*)new TYPE[size]; 47 mCleanupMethod = &(cleanup<TYPE>); 48 49 return (TYPE*)mBuffer; 50 } 51 getBuffer()52 void* getBuffer() { return mBuffer; } getSize()53 unsigned int getSize() { return mSize; } 54 55 private: 56 template <class TYPE> cleanup(void * buffer)57 static void cleanup(void* buffer) { 58 delete[] (TYPE*)buffer; 59 } 60 61 void* mBuffer; 62 unsigned int mSize; 63 void (*mCleanupMethod)(void*); 64 }; 65 66 class PathRenderer { 67 public: 68 static SkRect computePathBounds(const SkPath& path, const SkPaint* paint); 69 70 static void convexPathVertices(const SkPath& path, const SkPaint* paint, 71 const mat4 *transform, VertexBuffer& vertexBuffer); 72 73 private: 74 static bool convexPathPerimeterVertices(const SkPath &path, bool forceClose, 75 float sqrInvScaleX, float sqrInvScaleY, Vector<Vertex> &outputVertices); 76 77 /* 78 endpoints a & b, 79 control c 80 */ 81 static void recursiveQuadraticBezierVertices( 82 float ax, float ay, 83 float bx, float by, 84 float cx, float cy, 85 float sqrInvScaleX, float sqrInvScaleY, 86 Vector<Vertex> &outputVertices); 87 88 /* 89 endpoints p1, p2 90 control c1, c2 91 */ 92 static void recursiveCubicBezierVertices( 93 float p1x, float p1y, 94 float c1x, float c1y, 95 float p2x, float p2y, 96 float c2x, float c2y, 97 float sqrInvScaleX, float sqrInvScaleY, 98 Vector<Vertex> &outputVertices); 99 }; 100 101 }; // namespace uirenderer 102 }; // namespace android 103 104 #endif // ANDROID_HWUI_PATH_RENDERER_H 105