lib/ui/painting/path.cc - mirrors/engine - Git at Google

 // 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.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 CanvasPath Path;

 IMPLEMENT_WRAPPERTYPEINFO(ui, Path);

 CanvasPath::CanvasPath()
     : path_tracker_(UIDartState::Current()->GetVolatilePathTracker()),
       tracked_path_(std::make_shared<VolatilePathTracker::TrackedPath>()) {
   FML_DCHECK(path_tracker_);
   resetVolatility();
 }

 CanvasPath::~CanvasPath() = default;

 void CanvasPath::resetVolatility() {
   if (!tracked_path_->tracking_volatility) {
     mutable_path().setIsVolatile(true);
     tracked_path_->frame_count = 0;
     tracked_path_->tracking_volatility = true;
     path_tracker_->Track(tracked_path_);
   }
 }

 int CanvasPath::getFillType() {
   return static_cast<int>(path().getFillType());
 }

 void CanvasPath::setFillType(int fill_type) {
   mutable_path().setFillType(static_cast<SkPathFillType>(fill_type));
   resetVolatility();
 }

 void CanvasPath::moveTo(float x, float y) {
   mutable_path().moveTo(x, y);
   resetVolatility();
 }

 void CanvasPath::relativeMoveTo(float x, float y) {
   mutable_path().rMoveTo(x, y);
   resetVolatility();
 }

 void CanvasPath::lineTo(float x, float y) {
   mutable_path().lineTo(x, y);
   resetVolatility();
 }

 void CanvasPath::relativeLineTo(float x, float y) {
   mutable_path().rLineTo(x, y);
   resetVolatility();
 }

 void CanvasPath::quadraticBezierTo(float x1, float y1, float x2, float y2) {
   mutable_path().quadTo(x1, y1, x2, y2);
   resetVolatility();
 }

 void CanvasPath::relativeQuadraticBezierTo(float x1,
                                            float y1,
                                            float x2,
                                            float y2) {
   mutable_path().rQuadTo(x1, y1, x2, y2);
   resetVolatility();
 }

 void CanvasPath::cubicTo(float x1,
                          float y1,
                          float x2,
                          float y2,
                          float x3,
                          float y3) {
   mutable_path().cubicTo(x1, y1, x2, y2, x3, y3);
   resetVolatility();
 }

 void CanvasPath::relativeCubicTo(float x1,
                                  float y1,
                                  float x2,
                                  float y2,
                                  float x3,
                                  float y3) {
   mutable_path().rCubicTo(x1, y1, x2, y2, x3, y3);
   resetVolatility();
 }

 void CanvasPath::conicTo(float x1, float y1, float x2, float y2, float w) {
   mutable_path().conicTo(x1, y1, x2, y2, w);
   resetVolatility();
 }

 void CanvasPath::relativeConicTo(float x1,
                                  float y1,
                                  float x2,
                                  float y2,
                                  float w) {
   mutable_path().rConicTo(x1, y1, x2, y2, w);
   resetVolatility();
 }

 void CanvasPath::arcTo(float left,
                        float top,
                        float right,
                        float bottom,
                        float startAngle,
                        float sweepAngle,
                        bool forceMoveTo) {
   mutable_path().arcTo(SkRect::MakeLTRB(left, top, right, bottom),
                        startAngle * 180.0 / M_PI, sweepAngle * 180.0 / M_PI,
                        forceMoveTo);
   resetVolatility();
 }

 void CanvasPath::arcToPoint(float arcEndX,
                             float arcEndY,
                             float radiusX,
                             float radiusY,
                             float xAxisRotation,
                             bool isLargeArc,
                             bool isClockwiseDirection) {
   const auto arcSize = isLargeArc ? SkPath::ArcSize::kLarge_ArcSize
                                   : SkPath::ArcSize::kSmall_ArcSize;
   const auto direction =
       isClockwiseDirection ? SkPathDirection::kCW : SkPathDirection::kCCW;

   mutable_path().arcTo(radiusX, radiusY, xAxisRotation, arcSize, direction,
                        arcEndX, arcEndY);
   resetVolatility();
 }

 void CanvasPath::relativeArcToPoint(float arcEndDeltaX,
                                     float arcEndDeltaY,
                                     float radiusX,
                                     float radiusY,
                                     float xAxisRotation,
                                     bool isLargeArc,
                                     bool isClockwiseDirection) {
   const auto arcSize = isLargeArc ? SkPath::ArcSize::kLarge_ArcSize
                                   : SkPath::ArcSize::kSmall_ArcSize;
   const auto direction =
       isClockwiseDirection ? SkPathDirection::kCW : SkPathDirection::kCCW;
   mutable_path().rArcTo(radiusX, radiusY, xAxisRotation, arcSize, direction,
                         arcEndDeltaX, arcEndDeltaY);
   resetVolatility();
 }

 void CanvasPath::addRect(float left, float top, float right, float bottom) {
   mutable_path().addRect(SkRect::MakeLTRB(left, top, right, bottom));
   resetVolatility();
 }

 void CanvasPath::addOval(float left, float top, float right, float bottom) {
   mutable_path().addOval(SkRect::MakeLTRB(left, top, right, bottom));
   resetVolatility();
 }

 void CanvasPath::addArc(float left,
                         float top,
                         float right,
                         float bottom,
                         float startAngle,
                         float sweepAngle) {
   mutable_path().addArc(SkRect::MakeLTRB(left, top, right, bottom),
                         startAngle * 180.0 / M_PI, sweepAngle * 180.0 / M_PI);
   resetVolatility();
 }

 void CanvasPath::addPolygon(const tonic::Float32List& points, bool close) {
   mutable_path().addPoly(reinterpret_cast<const SkPoint*>(points.data()),
                          points.num_elements() / 2, close);
   resetVolatility();
 }

 void CanvasPath::addRRect(const RRect& rrect) {
   mutable_path().addRRect(rrect.sk_rrect);
   resetVolatility();
 }

 void CanvasPath::addPath(CanvasPath* path, double dx, double dy) {
   if (!path) {
     Dart_ThrowException(ToDart("Path.addPath called with non-genuine Path."));
     return;
   }
   mutable_path().addPath(path->path(), dx, dy, SkPath::kAppend_AddPathMode);
   resetVolatility();
 }

 void CanvasPath::addPathWithMatrix(CanvasPath* path,
                                    double dx,
                                    double dy,
                                    Dart_Handle matrix4_handle) {
   tonic::Float64List matrix4(matrix4_handle);

   if (!path) {
     matrix4.Release();
     Dart_ThrowException(
         ToDart("Path.addPathWithMatrix called with non-genuine Path."));
     return;
   }

   SkMatrix matrix = ToSkMatrix(matrix4);
   matrix4.Release();
   matrix.setTranslateX(matrix.getTranslateX() + dx);
   matrix.setTranslateY(matrix.getTranslateY() + dy);
   mutable_path().addPath(path->path(), matrix, SkPath::kAppend_AddPathMode);
   resetVolatility();
 }

 void CanvasPath::extendWithPath(CanvasPath* path, double dx, double dy) {
   if (!path) {
     Dart_ThrowException(
         ToDart("Path.extendWithPath called with non-genuine Path."));
     return;
   }
   mutable_path().addPath(path->path(), dx, dy, SkPath::kExtend_AddPathMode);
   resetVolatility();
 }

 void CanvasPath::extendWithPathAndMatrix(CanvasPath* path,
                                          double dx,
                                          double dy,
                                          Dart_Handle matrix4_handle) {
   tonic::Float64List matrix4(matrix4_handle);

   if (!path) {
     matrix4.Release();
     Dart_ThrowException(
         ToDart("Path.addPathWithMatrix called with non-genuine Path."));
     return;
   }

   SkMatrix matrix = ToSkMatrix(matrix4);
   matrix4.Release();
   matrix.setTranslateX(matrix.getTranslateX() + dx);
   matrix.setTranslateY(matrix.getTranslateY() + dy);
   mutable_path().addPath(path->path(), matrix, SkPath::kExtend_AddPathMode);
   resetVolatility();
 }

 void CanvasPath::close() {
   mutable_path().close();
   resetVolatility();
 }

 void CanvasPath::reset() {
   mutable_path().reset();
   resetVolatility();
 }

 bool CanvasPath::contains(double x, double y) {
   return path().contains(x, y);
 }

 void CanvasPath::shift(Dart_Handle path_handle, double dx, double dy) {
   fml::RefPtr<CanvasPath> path = Create(path_handle);
   auto& other_mutable_path = path->mutable_path();
   mutable_path().offset(dx, dy, &other_mutable_path);
   resetVolatility();
 }

 void CanvasPath::transform(Dart_Handle path_handle,
                            Dart_Handle matrix4_handle) {
   tonic::Float64List matrix4(matrix4_handle);
   auto sk_matrix = ToSkMatrix(matrix4);
   matrix4.Release();
   fml::RefPtr<CanvasPath> path = Create(path_handle);
   auto& other_mutable_path = path->mutable_path();
   mutable_path().transform(sk_matrix, &other_mutable_path);
 }

 tonic::Float32List CanvasPath::getBounds() {
   tonic::Float32List rect(Dart_NewTypedData(Dart_TypedData_kFloat32, 4));
   const SkRect& bounds = path().getBounds();
   rect[0] = bounds.left();
   rect[1] = bounds.top();
   rect[2] = bounds.right();
   rect[3] = bounds.bottom();
   return rect;
 }

 bool CanvasPath::op(CanvasPath* path1, CanvasPath* path2, int operation) {
   return Op(path1->path(), path2->path(), static_cast<SkPathOp>(operation),
             &tracked_path_->path);
   resetVolatility();
 }

 void CanvasPath::clone(Dart_Handle path_handle) {
   fml::RefPtr<CanvasPath> path = Create(path_handle);
   // per Skia docs, this will create a fast copy
   // data is shared until the source path or dest path are mutated
   path->mutable_path() = this->path();
 }

 // This is doomed to be called too early, since Paths are mutable.
 // However, it can help for some of the clone/shift/transform type methods
 // where the resultant path will initially have a meaningful size.
 size_t CanvasPath::GetAllocationSize() const {
   return sizeof(CanvasPath) + path().approximateBytesUsed();
 }

 }  // namespace flutter
	// 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.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 CanvasPath Path;

	IMPLEMENT_WRAPPERTYPEINFO(ui, Path);

	CanvasPath::CanvasPath()
	: path_tracker_(UIDartState::Current()->GetVolatilePathTracker()),
	tracked_path_(std::make_shared<VolatilePathTracker::TrackedPath>()) {
	FML_DCHECK(path_tracker_);
	resetVolatility();
	}

	CanvasPath::~CanvasPath() = default;

	void CanvasPath::resetVolatility() {
	if (!tracked_path_->tracking_volatility) {
	mutable_path().setIsVolatile(true);
	tracked_path_->frame_count = 0;
	tracked_path_->tracking_volatility = true;
	path_tracker_->Track(tracked_path_);
	}
	}

	int CanvasPath::getFillType() {
	return static_cast<int>(path().getFillType());
	}

	void CanvasPath::setFillType(int fill_type) {
	mutable_path().setFillType(static_cast<SkPathFillType>(fill_type));
	resetVolatility();
	}

	void CanvasPath::moveTo(float x, float y) {
	mutable_path().moveTo(x, y);
	resetVolatility();
	}

	void CanvasPath::relativeMoveTo(float x, float y) {
	mutable_path().rMoveTo(x, y);
	resetVolatility();
	}

	void CanvasPath::lineTo(float x, float y) {
	mutable_path().lineTo(x, y);
	resetVolatility();
	}

	void CanvasPath::relativeLineTo(float x, float y) {
	mutable_path().rLineTo(x, y);
	resetVolatility();
	}

	void CanvasPath::quadraticBezierTo(float x1, float y1, float x2, float y2) {
	mutable_path().quadTo(x1, y1, x2, y2);
	resetVolatility();
	}

	void CanvasPath::relativeQuadraticBezierTo(float x1,
	float y1,
	float x2,
	float y2) {
	mutable_path().rQuadTo(x1, y1, x2, y2);
	resetVolatility();
	}

	void CanvasPath::cubicTo(float x1,
	float y1,
	float x2,
	float y2,
	float x3,
	float y3) {
	mutable_path().cubicTo(x1, y1, x2, y2, x3, y3);
	resetVolatility();
	}

	void CanvasPath::relativeCubicTo(float x1,
	float y1,
	float x2,
	float y2,
	float x3,
	float y3) {
	mutable_path().rCubicTo(x1, y1, x2, y2, x3, y3);
	resetVolatility();
	}

	void CanvasPath::conicTo(float x1, float y1, float x2, float y2, float w) {
	mutable_path().conicTo(x1, y1, x2, y2, w);
	resetVolatility();
	}

	void CanvasPath::relativeConicTo(float x1,
	float y1,
	float x2,
	float y2,
	float w) {
	mutable_path().rConicTo(x1, y1, x2, y2, w);
	resetVolatility();
	}

	void CanvasPath::arcTo(float left,
	float top,
	float right,
	float bottom,
	float startAngle,
	float sweepAngle,
	bool forceMoveTo) {
	mutable_path().arcTo(SkRect::MakeLTRB(left, top, right, bottom),
	startAngle * 180.0 / M_PI, sweepAngle * 180.0 / M_PI,
	forceMoveTo);
	resetVolatility();
	}

	void CanvasPath::arcToPoint(float arcEndX,
	float arcEndY,
	float radiusX,
	float radiusY,
	float xAxisRotation,
	bool isLargeArc,
	bool isClockwiseDirection) {
	const auto arcSize = isLargeArc ? SkPath::ArcSize::kLarge_ArcSize
	: SkPath::ArcSize::kSmall_ArcSize;
	const auto direction =
	isClockwiseDirection ? SkPathDirection::kCW : SkPathDirection::kCCW;

	mutable_path().arcTo(radiusX, radiusY, xAxisRotation, arcSize, direction,
	arcEndX, arcEndY);
	resetVolatility();
	}

	void CanvasPath::relativeArcToPoint(float arcEndDeltaX,
	float arcEndDeltaY,
	float radiusX,
	float radiusY,
	float xAxisRotation,
	bool isLargeArc,
	bool isClockwiseDirection) {
	const auto arcSize = isLargeArc ? SkPath::ArcSize::kLarge_ArcSize
	: SkPath::ArcSize::kSmall_ArcSize;
	const auto direction =
	isClockwiseDirection ? SkPathDirection::kCW : SkPathDirection::kCCW;
	mutable_path().rArcTo(radiusX, radiusY, xAxisRotation, arcSize, direction,
	arcEndDeltaX, arcEndDeltaY);
	resetVolatility();
	}

	void CanvasPath::addRect(float left, float top, float right, float bottom) {
	mutable_path().addRect(SkRect::MakeLTRB(left, top, right, bottom));
	resetVolatility();
	}

	void CanvasPath::addOval(float left, float top, float right, float bottom) {
	mutable_path().addOval(SkRect::MakeLTRB(left, top, right, bottom));
	resetVolatility();
	}

	void CanvasPath::addArc(float left,
	float top,
	float right,
	float bottom,
	float startAngle,
	float sweepAngle) {
	mutable_path().addArc(SkRect::MakeLTRB(left, top, right, bottom),
	startAngle * 180.0 / M_PI, sweepAngle * 180.0 / M_PI);
	resetVolatility();
	}

	void CanvasPath::addPolygon(const tonic::Float32List& points, bool close) {
	mutable_path().addPoly(reinterpret_cast<const SkPoint*>(points.data()),
	points.num_elements() / 2, close);
	resetVolatility();
	}

	void CanvasPath::addRRect(const RRect& rrect) {
	mutable_path().addRRect(rrect.sk_rrect);
	resetVolatility();
	}

	void CanvasPath::addPath(CanvasPath* path, double dx, double dy) {
	if (!path) {
	Dart_ThrowException(ToDart("Path.addPath called with non-genuine Path."));
	return;
	}
	mutable_path().addPath(path->path(), dx, dy, SkPath::kAppend_AddPathMode);
	resetVolatility();
	}

	void CanvasPath::addPathWithMatrix(CanvasPath* path,
	double dx,
	double dy,
	Dart_Handle matrix4_handle) {
	tonic::Float64List matrix4(matrix4_handle);

	if (!path) {
	matrix4.Release();
	Dart_ThrowException(
	ToDart("Path.addPathWithMatrix called with non-genuine Path."));
	return;
	}

	SkMatrix matrix = ToSkMatrix(matrix4);
	matrix4.Release();
	matrix.setTranslateX(matrix.getTranslateX() + dx);
	matrix.setTranslateY(matrix.getTranslateY() + dy);
	mutable_path().addPath(path->path(), matrix, SkPath::kAppend_AddPathMode);
	resetVolatility();
	}

	void CanvasPath::extendWithPath(CanvasPath* path, double dx, double dy) {
	if (!path) {
	Dart_ThrowException(
	ToDart("Path.extendWithPath called with non-genuine Path."));
	return;
	}
	mutable_path().addPath(path->path(), dx, dy, SkPath::kExtend_AddPathMode);
	resetVolatility();
	}

	void CanvasPath::extendWithPathAndMatrix(CanvasPath* path,
	double dx,
	double dy,
	Dart_Handle matrix4_handle) {
	tonic::Float64List matrix4(matrix4_handle);

	if (!path) {
	matrix4.Release();
	Dart_ThrowException(
	ToDart("Path.addPathWithMatrix called with non-genuine Path."));
	return;
	}

	SkMatrix matrix = ToSkMatrix(matrix4);
	matrix4.Release();
	matrix.setTranslateX(matrix.getTranslateX() + dx);
	matrix.setTranslateY(matrix.getTranslateY() + dy);
	mutable_path().addPath(path->path(), matrix, SkPath::kExtend_AddPathMode);
	resetVolatility();
	}

	void CanvasPath::close() {
	mutable_path().close();
	resetVolatility();
	}

	void CanvasPath::reset() {
	mutable_path().reset();
	resetVolatility();
	}

	bool CanvasPath::contains(double x, double y) {
	return path().contains(x, y);
	}

	void CanvasPath::shift(Dart_Handle path_handle, double dx, double dy) {
	fml::RefPtr<CanvasPath> path = Create(path_handle);
	auto& other_mutable_path = path->mutable_path();
	mutable_path().offset(dx, dy, &other_mutable_path);
	resetVolatility();
	}

	void CanvasPath::transform(Dart_Handle path_handle,
	Dart_Handle matrix4_handle) {
	tonic::Float64List matrix4(matrix4_handle);
	auto sk_matrix = ToSkMatrix(matrix4);
	matrix4.Release();
	fml::RefPtr<CanvasPath> path = Create(path_handle);
	auto& other_mutable_path = path->mutable_path();
	mutable_path().transform(sk_matrix, &other_mutable_path);
	}

	tonic::Float32List CanvasPath::getBounds() {
	tonic::Float32List rect(Dart_NewTypedData(Dart_TypedData_kFloat32, 4));
	const SkRect& bounds = path().getBounds();
	rect[0] = bounds.left();
	rect[1] = bounds.top();
	rect[2] = bounds.right();
	rect[3] = bounds.bottom();
	return rect;
	}

	bool CanvasPath::op(CanvasPath* path1, CanvasPath* path2, int operation) {
	return Op(path1->path(), path2->path(), static_cast<SkPathOp>(operation),
	&tracked_path_->path);
	resetVolatility();
	}

	void CanvasPath::clone(Dart_Handle path_handle) {
	fml::RefPtr<CanvasPath> path = Create(path_handle);
	// per Skia docs, this will create a fast copy
	// data is shared until the source path or dest path are mutated
	path->mutable_path() = this->path();
	}

	// This is doomed to be called too early, since Paths are mutable.
	// However, it can help for some of the clone/shift/transform type methods
	// where the resultant path will initially have a meaningful size.
	size_t CanvasPath::GetAllocationSize() const {
	return sizeof(CanvasPath) + path().approximateBytesUsed();
	}

	} // namespace flutter