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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrQuad_DEFINED
#define GrQuad_DEFINED
#include "SkPoint.h"
#include "SkMatrix.h"
#include "SkMatrixPriv.h"
/**
* GrQuad is a collection of 4 points which can be used to represent an arbitrary quadrilateral. The
* points make a triangle strip with CCW triangles (top-left, bottom-left, top-right, bottom-right).
*/
class GrQuad {
public:
GrQuad() {}
GrQuad(const GrQuad& that) {
*this = that;
}
explicit GrQuad(const SkRect& rect) {
this->set(rect);
}
void set(const SkRect& rect) {
fPoints->setRectTriStrip(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, sizeof(SkPoint));
}
void map(const SkMatrix& matrix) {
matrix.mapPoints(fPoints, kNumPoints);
}
void setFromMappedRect(const SkRect& rect, const SkMatrix& matrix) {
SkMatrixPriv::SetMappedRectTriStrip(matrix, rect, fPoints);
}
const GrQuad& operator=(const GrQuad& that) {
memcpy(fPoints, that.fPoints, sizeof(SkPoint) * kNumPoints);
return *this;
}
SkPoint* points() {
return fPoints;
}
const SkPoint* points() const {
return fPoints;
}
const SkPoint& point(int i) const {
SkASSERT(i < kNumPoints);
return fPoints[i];
}
private:
static const int kNumPoints = 4;
SkPoint fPoints[kNumPoints];
};
#endif
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