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 24namespace android { 25namespace uirenderer { 26 27class Matrix4; 28typedef Matrix4 mat4; 29 30class VertexBuffer { 31public: 32 VertexBuffer(): 33 mBuffer(0), 34 mSize(0), 35 mCleanupMethod(0) 36 {} 37 38 ~VertexBuffer() { 39 if (mCleanupMethod) 40 mCleanupMethod(mBuffer); 41 } 42 43 template <class TYPE> 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 52 void* getBuffer() { return mBuffer; } 53 unsigned int getSize() { return mSize; } 54 55private: 56 template <class TYPE> 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 66class PathRenderer { 67public: 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 73private: 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