DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (1aeaa33a64f9)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "PathSkia.h"
#include <math.h>
#include "DrawTargetSkia.h"
#include "Logging.h"
#include "HelpersSkia.h"
#include "PathHelpers.h"

namespace mozilla {
namespace gfx {

PathBuilderSkia::PathBuilderSkia(const Matrix &aTransform, const SkPath &aPath,
                                 FillRule aFillRule)
    : mPath(aPath) {
  SkMatrix matrix;
  GfxMatrixToSkiaMatrix(aTransform, matrix);
  mPath.transform(matrix);
  SetFillRule(aFillRule);
}

PathBuilderSkia::PathBuilderSkia(FillRule aFillRule) { SetFillRule(aFillRule); }

void PathBuilderSkia::SetFillRule(FillRule aFillRule) {
  mFillRule = aFillRule;
  if (mFillRule == FillRule::FILL_WINDING) {
    mPath.setFillType(SkPath::kWinding_FillType);
  } else {
    mPath.setFillType(SkPath::kEvenOdd_FillType);
  }
}

void PathBuilderSkia::MoveTo(const Point &aPoint) {
  mPath.moveTo(SkFloatToScalar(aPoint.x), SkFloatToScalar(aPoint.y));
}

void PathBuilderSkia::LineTo(const Point &aPoint) {
  if (!mPath.countPoints()) {
    MoveTo(aPoint);
  } else {
    mPath.lineTo(SkFloatToScalar(aPoint.x), SkFloatToScalar(aPoint.y));
  }
}

void PathBuilderSkia::BezierTo(const Point &aCP1, const Point &aCP2,
                               const Point &aCP3) {
  if (!mPath.countPoints()) {
    MoveTo(aCP1);
  }
  mPath.cubicTo(SkFloatToScalar(aCP1.x), SkFloatToScalar(aCP1.y),
                SkFloatToScalar(aCP2.x), SkFloatToScalar(aCP2.y),
                SkFloatToScalar(aCP3.x), SkFloatToScalar(aCP3.y));
}

void PathBuilderSkia::QuadraticBezierTo(const Point &aCP1, const Point &aCP2) {
  if (!mPath.countPoints()) {
    MoveTo(aCP1);
  }
  mPath.quadTo(SkFloatToScalar(aCP1.x), SkFloatToScalar(aCP1.y),
               SkFloatToScalar(aCP2.x), SkFloatToScalar(aCP2.y));
}

void PathBuilderSkia::Close() { mPath.close(); }

void PathBuilderSkia::Arc(const Point &aOrigin, float aRadius,
                          float aStartAngle, float aEndAngle,
                          bool aAntiClockwise) {
  ArcToBezier(this, aOrigin, Size(aRadius, aRadius), aStartAngle, aEndAngle,
              aAntiClockwise);
}

Point PathBuilderSkia::CurrentPoint() const {
  int pointCount = mPath.countPoints();
  if (!pointCount) {
    return Point(0, 0);
  }
  SkPoint point = mPath.getPoint(pointCount - 1);
  return Point(SkScalarToFloat(point.fX), SkScalarToFloat(point.fY));
}

already_AddRefed<Path> PathBuilderSkia::Finish() {
  return MakeAndAddRef<PathSkia>(mPath, mFillRule);
}

void PathBuilderSkia::AppendPath(const SkPath &aPath) { mPath.addPath(aPath); }

already_AddRefed<PathBuilder> PathSkia::CopyToBuilder(
    FillRule aFillRule) const {
  return TransformedCopyToBuilder(Matrix(), aFillRule);
}

already_AddRefed<PathBuilder> PathSkia::TransformedCopyToBuilder(
    const Matrix &aTransform, FillRule aFillRule) const {
  return MakeAndAddRef<PathBuilderSkia>(aTransform, mPath, aFillRule);
}

static bool SkPathContainsPoint(const SkPath &aPath, const Point &aPoint,
                                const Matrix &aTransform) {
  Matrix inverse = aTransform;
  if (!inverse.Invert()) {
    return false;
  }

  SkPoint point = PointToSkPoint(inverse.TransformPoint(aPoint));
  return aPath.contains(point.fX, point.fY);
}

bool PathSkia::ContainsPoint(const Point &aPoint,
                             const Matrix &aTransform) const {
  if (!mPath.isFinite()) {
    return false;
  }

  return SkPathContainsPoint(mPath, aPoint, aTransform);
}

bool PathSkia::StrokeContainsPoint(const StrokeOptions &aStrokeOptions,
                                   const Point &aPoint,
                                   const Matrix &aTransform) const {
  if (!mPath.isFinite()) {
    return false;
  }

  SkPaint paint;
  if (!StrokeOptionsToPaint(paint, aStrokeOptions)) {
    return false;
  }

  SkPath strokePath;
  paint.getFillPath(mPath, &strokePath);

  return SkPathContainsPoint(strokePath, aPoint, aTransform);
}

Rect PathSkia::GetBounds(const Matrix &aTransform) const {
  if (!mPath.isFinite()) {
    return Rect();
  }

  Rect bounds = SkRectToRect(mPath.computeTightBounds());
  return aTransform.TransformBounds(bounds);
}

Rect PathSkia::GetStrokedBounds(const StrokeOptions &aStrokeOptions,
                                const Matrix &aTransform) const {
  if (!mPath.isFinite()) {
    return Rect();
  }

  SkPaint paint;
  if (!StrokeOptionsToPaint(paint, aStrokeOptions)) {
    return Rect();
  }

  SkPath result;
  paint.getFillPath(mPath, &result);

  Rect bounds = SkRectToRect(result.computeTightBounds());
  return aTransform.TransformBounds(bounds);
}

void PathSkia::StreamToSink(PathSink *aSink) const {
  SkPath::RawIter iter(mPath);

  SkPoint points[4];
  SkPath::Verb currentVerb;
  while ((currentVerb = iter.next(points)) != SkPath::kDone_Verb) {
    switch (currentVerb) {
      case SkPath::kMove_Verb:
        aSink->MoveTo(SkPointToPoint(points[0]));
        break;
      case SkPath::kLine_Verb:
        aSink->LineTo(SkPointToPoint(points[1]));
        break;
      case SkPath::kCubic_Verb:
        aSink->BezierTo(SkPointToPoint(points[1]), SkPointToPoint(points[2]),
                        SkPointToPoint(points[3]));
        break;
      case SkPath::kQuad_Verb:
        aSink->QuadraticBezierTo(SkPointToPoint(points[1]),
                                 SkPointToPoint(points[2]));
        break;
      case SkPath::kClose_Verb:
        aSink->Close();
        break;
      default:
        MOZ_ASSERT(false);
        // Unexpected verb found in path!
    }
  }
}

}  // namespace gfx
}  // namespace mozilla