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 "SkColorData.h" 12 #include "SkMatrix.h" 13 #include "SkVertices.h" 14 15 class SK_API SkPatchUtils { 16 17 public: 18 // Enums for control points based on the order specified in the constructor (clockwise). 19 enum { 20 kNumCtrlPts = 12, 21 kNumCorners = 4, 22 kNumPtsCubic = 4 23 }; 24 25 /** 26 * Get the points corresponding to the top cubic of cubics. 27 */ 28 static void GetTopCubic(const SkPoint cubics[12], SkPoint points[4]); 29 30 /** 31 * Get the points corresponding to the bottom cubic of cubics. 32 */ 33 static void GetBottomCubic(const SkPoint cubics[12], SkPoint points[4]); 34 35 /** 36 * Get the points corresponding to the left cubic of cubics. 37 */ 38 static void GetLeftCubic(const SkPoint cubics[12], SkPoint points[4]); 39 40 /** 41 * Get the points corresponding to the right cubic of cubics. 42 */ 43 static void GetRightCubic(const SkPoint cubics[12], SkPoint points[4]); 44 45 /** 46 * Method that calculates a level of detail (number of subdivisions) for a patch in both axis. 47 */ 48 static SkISize GetLevelOfDetail(const SkPoint cubics[12], const SkMatrix* matrix); 49 50 static sk_sp<SkVertices> MakeVertices(const SkPoint cubics[12], const SkColor colors[4], 51 const SkPoint texCoords[4], int lodX, int lodY, 52 bool interpColorsLinearly = false); 53 }; 54 55 #endif 56
