joshualitt | ae5b2c6 | 2015-08-19 08:48:41 -0700 | [diff] [blame] | 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: |
joshualitt | 8cce8f1 | 2015-08-26 06:23:39 -0700 | [diff] [blame^] | 19 | GrQuad() {} |
| 20 | |
joshualitt | ae5b2c6 | 2015-08-19 08:48:41 -0700 | [diff] [blame] | 21 | GrQuad(const GrQuad& that) { |
| 22 | *this = that; |
| 23 | } |
| 24 | |
| 25 | explicit GrQuad(const SkRect& rect) { |
| 26 | this->set(rect); |
| 27 | } |
| 28 | |
| 29 | void set(const SkRect& rect) { |
| 30 | fPoints->setRectFan(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom); |
| 31 | } |
| 32 | |
| 33 | void map(const SkMatrix& matrix) { |
| 34 | matrix.mapPoints(fPoints, kNumPoints); |
| 35 | } |
| 36 | |
| 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 | |
| 47 | SkPoint* points() { |
| 48 | return fPoints; |
| 49 | } |
| 50 | |
| 51 | const SkPoint* points() const { |
| 52 | return fPoints; |
| 53 | } |
| 54 | |
joshualitt | 8cce8f1 | 2015-08-26 06:23:39 -0700 | [diff] [blame^] | 55 | const SkPoint& point(int i) const { |
| 56 | SkASSERT(i < kNumPoints); |
| 57 | return fPoints[i]; |
| 58 | } |
| 59 | |
joshualitt | ae5b2c6 | 2015-08-19 08:48:41 -0700 | [diff] [blame] | 60 | private: |
| 61 | static const int kNumPoints = 4; |
| 62 | SkPoint fPoints[kNumPoints]; |
| 63 | }; |
| 64 | |
| 65 | #endif |