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/*
* Copyright 2014 Google Inc.
*
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
*/
#include "Global.h"
#include "Path2DBuilder.h"
#include "Path2D.h"
#include "SkPath.h"
Global* Path2DBuilder::gGlobal = NULL;
void Path2DBuilder::ConstructPath(const v8::FunctionCallbackInfo<v8::Value>& args) {
v8::HandleScope handleScope(gGlobal->getIsolate());
Path2DBuilder* path = new Path2DBuilder();
args.This()->SetInternalField(
0, v8::External::New(gGlobal->getIsolate(), path));
}
#define ADD_METHOD(name, fn) \
constructor->InstanceTemplate()->Set( \
v8::String::NewFromUtf8( \
global->getIsolate(), name, \
v8::String::kInternalizedString), \
v8::FunctionTemplate::New(global->getIsolate(), fn))
// Install the constructor in the global scope so Path2DBuilders can be constructed
// in JS.
void Path2DBuilder::AddToGlobal(Global* global) {
gGlobal = global;
// Create a stack-allocated handle scope.
v8::HandleScope handleScope(gGlobal->getIsolate());
v8::Handle<v8::Context> context = gGlobal->getContext();
// Enter the scope so all operations take place in the scope.
v8::Context::Scope contextScope(context);
v8::Local<v8::FunctionTemplate> constructor = v8::FunctionTemplate::New(
gGlobal->getIsolate(), Path2DBuilder::ConstructPath);
constructor->InstanceTemplate()->SetInternalFieldCount(1);
ADD_METHOD("close", ClosePath);
ADD_METHOD("moveTo", MoveTo);
ADD_METHOD("lineTo", LineTo);
ADD_METHOD("quadraticCurveTo", QuadraticCurveTo);
ADD_METHOD("bezierCurveTo", BezierCurveTo);
ADD_METHOD("arc", Arc);
ADD_METHOD("rect", Rect);
ADD_METHOD("oval", Oval);
ADD_METHOD("conicTo", ConicTo);
ADD_METHOD("finalize", Finalize);
context->Global()->Set(v8::String::NewFromUtf8(
gGlobal->getIsolate(), "Path2DBuilder"), constructor->GetFunction());
}
Path2DBuilder* Path2DBuilder::Unwrap(const v8::FunctionCallbackInfo<v8::Value>& args) {
v8::Handle<v8::External> field = v8::Handle<v8::External>::Cast(
args.This()->GetInternalField(0));
void* ptr = field->Value();
return static_cast<Path2DBuilder*>(ptr);
}
void Path2DBuilder::ClosePath(const v8::FunctionCallbackInfo<v8::Value>& args) {
Path2DBuilder* path = Unwrap(args);
path->fSkPath.close();
}
void Path2DBuilder::MoveTo(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() != 2) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 2 arguments required."));
return;
}
double x = args[0]->NumberValue();
double y = args[1]->NumberValue();
Path2DBuilder* path = Unwrap(args);
path->fSkPath.moveTo(SkDoubleToScalar(x), SkDoubleToScalar(y));
}
void Path2DBuilder::LineTo(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() != 2) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 2 arguments required."));
return;
}
double x = args[0]->NumberValue();
double y = args[1]->NumberValue();
Path2DBuilder* path = Unwrap(args);
path->fSkPath.lineTo(SkDoubleToScalar(x), SkDoubleToScalar(y));
}
void Path2DBuilder::QuadraticCurveTo(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() != 4) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 4 arguments required."));
return;
}
double cpx = args[0]->NumberValue();
double cpy = args[1]->NumberValue();
double x = args[2]->NumberValue();
double y = args[3]->NumberValue();
Path2DBuilder* path = Unwrap(args);
// TODO(jcgregorio) Doesn't handle the empty last path case correctly per
// the HTML 5 spec.
path->fSkPath.quadTo(
SkDoubleToScalar(cpx), SkDoubleToScalar(cpy),
SkDoubleToScalar(x), SkDoubleToScalar(y));
}
void Path2DBuilder::BezierCurveTo(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() != 6) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 6 arguments required."));
return;
}
double cp1x = args[0]->NumberValue();
double cp1y = args[1]->NumberValue();
double cp2x = args[2]->NumberValue();
double cp2y = args[3]->NumberValue();
double x = args[4]->NumberValue();
double y = args[5]->NumberValue();
Path2DBuilder* path = Unwrap(args);
// TODO(jcgregorio) Doesn't handle the empty last path case correctly per
// the HTML 5 spec.
path->fSkPath.cubicTo(
SkDoubleToScalar(cp1x), SkDoubleToScalar(cp1y),
SkDoubleToScalar(cp2x), SkDoubleToScalar(cp2y),
SkDoubleToScalar(x), SkDoubleToScalar(y));
}
void Path2DBuilder::Arc(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() != 5 && args.Length() != 6) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 5 or 6 args required."));
return;
}
double x = args[0]->NumberValue();
double y = args[1]->NumberValue();
double radius = args[2]->NumberValue();
double startAngle = args[3]->NumberValue();
double endAngle = args[4]->NumberValue();
bool antiClockwise = false;
if (args.Length() == 6) {
antiClockwise = args[5]->BooleanValue();
}
double sweepAngle;
if (!antiClockwise) {
sweepAngle = endAngle - startAngle;
} else {
sweepAngle = startAngle - endAngle;
startAngle = endAngle;
}
Path2DBuilder* path = Unwrap(args);
SkRect rect = {
SkDoubleToScalar(x-radius),
SkDoubleToScalar(y-radius),
SkDoubleToScalar(x+radius),
SkDoubleToScalar(y+radius)
};
path->fSkPath.addArc(rect, SkRadiansToDegrees(startAngle),
SkRadiansToDegrees(sweepAngle));
}
void Path2DBuilder::Rect(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() != 4) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 4 arguments required."));
return;
}
double x = args[0]->NumberValue();
double y = args[1]->NumberValue();
double w = args[2]->NumberValue();
double h = args[3]->NumberValue();
SkRect rect = {
SkDoubleToScalar(x),
SkDoubleToScalar(y),
SkDoubleToScalar(x) + SkDoubleToScalar(w),
SkDoubleToScalar(y) + SkDoubleToScalar(h)
};
Path2DBuilder* path = Unwrap(args);
path->fSkPath.addRect(rect);
}
void Path2DBuilder::Oval(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() != 4 && args.Length() != 5) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 4 or 5 args required."));
return;
}
double x = args[0]->NumberValue();
double y = args[1]->NumberValue();
double radiusX = args[2]->NumberValue();
double radiusY = args[3]->NumberValue();
SkPath::Direction dir = SkPath::kCW_Direction;
if (args.Length() == 5 && !args[4]->BooleanValue()) {
dir = SkPath::kCCW_Direction;
}
Path2DBuilder* path = Unwrap(args);
SkRect rect = {
SkDoubleToScalar(x-radiusX),
SkDoubleToScalar(y-radiusX),
SkDoubleToScalar(x+radiusY),
SkDoubleToScalar(y+radiusY)
};
path->fSkPath.addOval(rect, dir);
}
void Path2DBuilder::ConicTo(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (args.Length() != 5) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 5 args required."));
return;
}
double x1 = args[0]->NumberValue();
double y1 = args[1]->NumberValue();
double x2 = args[2]->NumberValue();
double y2 = args[3]->NumberValue();
double w = args[4]->NumberValue();
Path2DBuilder* path = Unwrap(args);
path->fSkPath.conicTo(
SkDoubleToScalar(x1),
SkDoubleToScalar(y1),
SkDoubleToScalar(x2),
SkDoubleToScalar(y2),
SkDoubleToScalar(w)
);
}
void Path2DBuilder::Finalize(const v8::FunctionCallbackInfo<v8::Value>& args) {
Path2DBuilder* path = Unwrap(args);
// Build Path2D from out fSkPath and return it.
SkPath* skPath = new SkPath(path->fSkPath);
path->fSkPath.reset();
Path2D* pathWrap = new Path2D(skPath);
args.GetReturnValue().Set(pathWrap->persistent());
}
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