1/* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#ifndef SkPatchUtils_DEFINED 9#define SkPatchUtils_DEFINED 10 11#include "include/core/SkMatrix.h" 12#include "include/private/SkColorData.h" 13 14class SkColorSpace; 15class SkVertices; 16 17class SkPatchUtils { 18 19public: 20 // Enums for control points based on the order specified in the constructor (clockwise). 21 enum { 22 kNumCtrlPts = 12, 23 kNumCorners = 4, 24 kNumPtsCubic = 4 25 }; 26 27 /** 28 * Get the points corresponding to the top cubic of cubics. 29 */ 30 static void GetTopCubic(const SkPoint cubics[12], SkPoint points[4]); 31 32 /** 33 * Get the points corresponding to the bottom cubic of cubics. 34 */ 35 static void GetBottomCubic(const SkPoint cubics[12], SkPoint points[4]); 36 37 /** 38 * Get the points corresponding to the left cubic of cubics. 39 */ 40 static void GetLeftCubic(const SkPoint cubics[12], SkPoint points[4]); 41 42 /** 43 * Get the points corresponding to the right cubic of cubics. 44 */ 45 static void GetRightCubic(const SkPoint cubics[12], SkPoint points[4]); 46 47 /** 48 * Method that calculates a level of detail (number of subdivisions) for a patch in both axis. 49 */ 50 static SkISize GetLevelOfDetail(const SkPoint cubics[12], const SkMatrix* matrix); 51 52 static sk_sp<SkVertices> MakeVertices(const SkPoint cubics[12], const SkColor colors[4], 53 const SkPoint texCoords[4], int lodX, int lodY, 54 SkColorSpace* colorSpace = nullptr); 55}; 56 57#endif 58