1 /* 2 * Copyright 2015 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 GrQuad_DEFINED 9 #define GrQuad_DEFINED 10 11 #include "SkPoint.h" 12 #include "SkMatrix.h" 13 #include "SkMatrixPriv.h" 14 15 /** 16 * GrQuad is a collection of 4 points which can be used to represent an arbitrary quadrilateral 17 */ 18 class GrQuad { 19 public: 20 GrQuad() {} 21 22 GrQuad(const GrQuad& that) { 23 *this = that; 24 } 25 26 explicit GrQuad(const SkRect& rect) { 27 this->set(rect); 28 } 29 30 void set(const SkRect& rect) { 31 fPoints->setRectFan(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom); 32 } 33 34 void map(const SkMatrix& matrix) { 35 matrix.mapPoints(fPoints, kNumPoints); 36 } 37 38 void setFromMappedRect(const SkRect& rect, const SkMatrix& matrix) { 39 SkMatrixPriv::SetMappedRectFan(matrix, rect, fPoints); 40 } 41 42 const GrQuad& operator=(const GrQuad& that) { 43 memcpy(fPoints, that.fPoints, sizeof(SkPoint) * kNumPoints); 44 return *this; 45 } 46 47 SkPoint* points() { 48 return fPoints; 49 } 50 51 const SkPoint* points() const { 52 return fPoints; 53 } 54 55 const SkPoint& point(int i) const { 56 SkASSERT(i < kNumPoints); 57 return fPoints[i]; 58 } 59 60 private: 61 static const int kNumPoints = 4; 62 SkPoint fPoints[kNumPoints]; 63 }; 64 65 #endif 66
