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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPathOpBounds_DEFINED
#define SkPathOpBounds_DEFINED
#include "SkPathOpsRect.h"
#include "SkRect.h"
// SkPathOpsBounds, unlike SkRect, does not consider a line to be empty.
struct SkPathOpsBounds : public SkRect {
static bool Intersects(const SkPathOpsBounds& a, const SkPathOpsBounds& b) {
return AlmostLessOrEqualUlps(a.fLeft, b.fRight)
&& AlmostLessOrEqualUlps(b.fLeft, a.fRight)
&& AlmostLessOrEqualUlps(a.fTop, b.fBottom)
&& AlmostLessOrEqualUlps(b.fTop, a.fBottom);
}
// Note that add(), unlike SkRect::join() or SkRect::growToInclude()
// does not treat the bounds of horizontal and vertical lines as
// empty rectangles.
void add(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom) {
if (left < fLeft) fLeft = left;
if (top < fTop) fTop = top;
if (right > fRight) fRight = right;
if (bottom > fBottom) fBottom = bottom;
}
void add(const SkPathOpsBounds& toAdd) {
add(toAdd.fLeft, toAdd.fTop, toAdd.fRight, toAdd.fBottom);
}
void add(const SkPoint& pt) {
if (pt.fX < fLeft) fLeft = pt.fX;
if (pt.fY < fTop) fTop = pt.fY;
if (pt.fX > fRight) fRight = pt.fX;
if (pt.fY > fBottom) fBottom = pt.fY;
}
bool almostContains(const SkPoint& pt) {
return AlmostLessOrEqualUlps(fLeft, pt.fX)
&& AlmostLessOrEqualUlps(pt.fX, fRight)
&& AlmostLessOrEqualUlps(fTop, pt.fY)
&& AlmostLessOrEqualUlps(pt.fY, fBottom);
}
// unlike isEmpty(), this permits lines, but not points
// FIXME: unused for now
bool isReallyEmpty() const {
// use !<= instead of > to detect NaN values
return !(fLeft <= fRight) || !(fTop <= fBottom)
|| (fLeft == fRight && fTop == fBottom);
}
void setCubicBounds(const SkPoint a[4]);
void setLineBounds(const SkPoint a[2]);
void setQuadBounds(const SkPoint a[3]);
void setPointBounds(const SkPoint& pt) {
fLeft = fRight = pt.fX;
fTop = fBottom = pt.fY;
}
typedef SkRect INHERITED;
};
extern void (SkPathOpsBounds::*SetCurveBounds[])(const SkPoint[]);
#endif
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