blob: af9e0e9837e1db5420987b8a647c482338c52183 [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "flutter/lib/ui/painting/path_measure.h"
#include <cmath>
#include "flutter/lib/ui/painting/matrix.h"
#include "flutter/lib/ui/ui_dart_state.h"
#include "third_party/tonic/converter/dart_converter.h"
#include "third_party/tonic/dart_args.h"
#include "third_party/tonic/dart_binding_macros.h"
#include "third_party/tonic/dart_library_natives.h"
using tonic::ToDart;
namespace flutter {
typedef CanvasPathMeasure PathMeasure;
static void PathMeasure_constructor(Dart_NativeArguments args) {
UIDartState::ThrowIfUIOperationsProhibited();
DartCallConstructor(&CanvasPathMeasure::Create, args);
}
IMPLEMENT_WRAPPERTYPEINFO(ui, PathMeasure);
#define FOR_EACH_BINDING(V) \
V(PathMeasure, setPath) \
V(PathMeasure, getLength) \
V(PathMeasure, getPosTan) \
V(PathMeasure, getSegment) \
V(PathMeasure, isClosed) \
V(PathMeasure, nextContour)
FOR_EACH_BINDING(DART_NATIVE_CALLBACK)
void CanvasPathMeasure::RegisterNatives(tonic::DartLibraryNatives* natives) {
natives->Register(
{{"PathMeasure_constructor", PathMeasure_constructor, 3, true},
FOR_EACH_BINDING(DART_REGISTER_NATIVE)});
}
fml::RefPtr<CanvasPathMeasure> CanvasPathMeasure::Create(const CanvasPath* path,
bool forceClosed) {
fml::RefPtr<CanvasPathMeasure> pathMeasure =
fml::MakeRefCounted<CanvasPathMeasure>();
if (path) {
const SkPath skPath = path->path();
SkScalar resScale = 1;
pathMeasure->path_measure_ =
std::make_unique<SkContourMeasureIter>(skPath, forceClosed, resScale);
} else {
pathMeasure->path_measure_ = std::make_unique<SkContourMeasureIter>();
}
return pathMeasure;
}
CanvasPathMeasure::CanvasPathMeasure() {}
CanvasPathMeasure::~CanvasPathMeasure() {}
void CanvasPathMeasure::setPath(const CanvasPath* path, bool isClosed) {
const SkPath& skPath = path->path();
path_measure_->reset(skPath, isClosed);
}
float CanvasPathMeasure::getLength(int contour_index) {
if (static_cast<std::vector<sk_sp<SkContourMeasure>>::size_type>(
contour_index) < measures_.size()) {
return measures_[contour_index]->length();
}
return -1;
}
tonic::Float32List CanvasPathMeasure::getPosTan(int contour_index,
float distance) {
tonic::Float32List posTan(Dart_NewTypedData(Dart_TypedData_kFloat32, 5));
posTan[0] = 0; // dart code will check for this for failure
if (static_cast<std::vector<sk_sp<SkContourMeasure>>::size_type>(
contour_index) >= measures_.size()) {
return posTan;
}
SkPoint pos;
SkVector tan;
bool success = measures_[contour_index]->getPosTan(distance, &pos, &tan);
if (success) {
posTan[0] = 1; // dart code will check for this for success
posTan[1] = pos.x();
posTan[2] = pos.y();
posTan[3] = tan.x();
posTan[4] = tan.y();
}
return posTan;
}
void CanvasPathMeasure::getSegment(Dart_Handle path_handle,
int contour_index,
float start_d,
float stop_d,
bool start_with_move_to) {
if (static_cast<std::vector<sk_sp<SkContourMeasure>>::size_type>(
contour_index) >= measures_.size()) {
CanvasPath::Create(path_handle);
}
SkPath dst;
bool success = measures_[contour_index]->getSegment(start_d, stop_d, &dst,
start_with_move_to);
if (!success) {
CanvasPath::Create(path_handle);
} else {
CanvasPath::CreateFrom(path_handle, dst);
}
}
bool CanvasPathMeasure::isClosed(int contour_index) {
if (static_cast<std::vector<sk_sp<SkContourMeasure>>::size_type>(
contour_index) < measures_.size()) {
return measures_[contour_index]->isClosed();
}
return false;
}
bool CanvasPathMeasure::nextContour() {
auto measure = path_measure_->next();
if (measure) {
measures_.push_back(std::move(measure));
return true;
}
return false;
}
} // namespace flutter