chromium/third_party/skia/src/core/SkPoint.cpp

/*
 * Copyright 2008 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "include/core/SkPoint.h"
#include "include/core/SkTypes.h"
#include "include/private/base/SkFloatingPoint.h"
#include "src/core/SkPointPriv.h"

#include <cmath>

///////////////////////////////////////////////////////////////////////////////

void SkPoint::scale(float scale, SkPoint* dst) const { … }

bool SkPoint::normalize() { … }

bool SkPoint::setNormalize(float x, float y) { … }

bool SkPoint::setLength(float length) { … }

/*
 *  We have to worry about 2 tricky conditions:
 *  1. underflow of mag2 (compared against nearlyzero^2)
 *  2. overflow of mag2 (compared w/ isfinite)
 *
 *  If we underflow, we return false. If we overflow, we compute again using
 *  doubles, which is much slower (3x in a desktop test) but will not overflow.
 */
template <bool use_rsqrt> bool set_point_length(SkPoint* pt, float x, float y, float length,
                                                float* orig_length = nullptr) { … }

float SkPoint::Normalize(SkPoint* pt) { … }

float SkPoint::Length(float dx, float dy) { … }

bool SkPoint::setLength(float x, float y, float length) { … }

bool SkPointPriv::SetLengthFast(SkPoint* pt, float length) { … }


///////////////////////////////////////////////////////////////////////////////

float SkPointPriv::DistanceToLineBetweenSqd(const SkPoint& pt, const SkPoint& a,
                                               const SkPoint& b,
                                               Side* side) { … }

float SkPointPriv::DistanceToLineSegmentBetweenSqd(const SkPoint& pt, const SkPoint& a,
                                                      const SkPoint& b) { … }