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