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/* -*- 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"
#include "skia/src/core/SkDraw.h"
namespace mozilla::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));
mCurrentPoint = aPoint;
mBeginPoint = aPoint;
}
void PathBuilderSkia::LineTo(const Point& aPoint) {
if (!mPath.countPoints()) {
MoveTo(aPoint);
} else {
mPath.lineTo(SkFloatToScalar(aPoint.x), SkFloatToScalar(aPoint.y));
}
mCurrentPoint = aPoint;
}
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));
mCurrentPoint = aCP3;
}
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));
mCurrentPoint = aCP2;
}
void PathBuilderSkia::Close() {
mPath.close();
mCurrentPoint = mBeginPoint;
}
void PathBuilderSkia::Arc(const Point& aOrigin, float aRadius,
float aStartAngle, float aEndAngle,
bool aAntiClockwise) {
ArcToBezier(this, aOrigin, Size(aRadius, aRadius), aStartAngle, aEndAngle,
aAntiClockwise);
}
already_AddRefed<Path> PathBuilderSkia::Finish() {
RefPtr<Path> path =
MakeAndAddRef<PathSkia>(mPath, mFillRule, mCurrentPoint, mBeginPoint);
mCurrentPoint = Point(0.0, 0.0);
mBeginPoint = Point(0.0, 0.0);
return path.forget();
}
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 {
RefPtr<PathBuilderSkia> builder =
MakeAndAddRef<PathBuilderSkia>(aTransform, mPath, aFillRule);
builder->mCurrentPoint = aTransform.TransformPoint(mCurrentPoint);
builder->mBeginPoint = aTransform.TransformPoint(mBeginPoint);
return builder.forget();
}
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;
}
SkMatrix skiaMatrix;
GfxMatrixToSkiaMatrix(aTransform, skiaMatrix);
SkPath strokePath;
paint.getFillPath(mPath, &strokePath, nullptr,
SkDraw::ComputeResScaleForStroking(skiaMatrix));
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 mozilla::gfx
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