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 14 /** 15 * GrQuad is a collection of 4 points which can be used to represent an arbitrary quadrilateral 16 */ 17 class GrQuad { 18 public: GrQuad()19 GrQuad() {} 20 GrQuad(const GrQuad & that)21 GrQuad(const GrQuad& that) { 22 *this = that; 23 } 24 GrQuad(const SkRect & rect)25 explicit GrQuad(const SkRect& rect) { 26 this->set(rect); 27 } 28 set(const SkRect & rect)29 void set(const SkRect& rect) { 30 fPoints->setRectFan(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom); 31 } 32 map(const SkMatrix & matrix)33 void map(const SkMatrix& matrix) { 34 matrix.mapPoints(fPoints, kNumPoints); 35 } 36 setFromMappedRect(const SkRect & rect,const SkMatrix & matrix)37 void setFromMappedRect(const SkRect& rect, const SkMatrix& matrix) { 38 this->set(rect); 39 matrix.mapPoints(fPoints, kNumPoints); 40 } 41 42 const GrQuad& operator=(const GrQuad& that) { 43 memcpy(fPoints, that.fPoints, sizeof(SkPoint) * kNumPoints); 44 return *this; 45 } 46 points()47 SkPoint* points() { 48 return fPoints; 49 } 50 points()51 const SkPoint* points() const { 52 return fPoints; 53 } 54 point(int i)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