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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 <v8.h>
#include "Global.h"
#include "DrawingMethods.h"
#include "Path2D.h"
#include "SkCanvas.h"
#include "SkPaint.h"
DrawingMethods* DrawingMethods::Unwrap(v8::Handle<v8::Object> obj) {
v8::Handle<v8::External> field = v8::Handle<v8::External>::Cast(obj->GetInternalField(0));
void* ptr = field->Value();
return static_cast<DrawingMethods*>(ptr);
}
void DrawingMethods::Save(const v8::FunctionCallbackInfo<v8::Value>& args) {
DrawingMethods* drawingMethods = Unwrap(args.This());
SkCanvas* canvas = drawingMethods->getCanvas();
if (NULL == canvas) {
return;
}
canvas->save();
}
void DrawingMethods::Restore(const v8::FunctionCallbackInfo<v8::Value>& args) {
DrawingMethods* drawingMethods = Unwrap(args.This());
SkCanvas* canvas = drawingMethods->getCanvas();
if (NULL == canvas) {
return;
}
canvas->restore();
}
void DrawingMethods::Rotate(const v8::FunctionCallbackInfo<v8::Value>& args) {
DrawingMethods* drawingMethods = Unwrap(args.This());
SkCanvas* canvas = drawingMethods->getCanvas();
if (NULL == canvas) {
return;
}
if (args.Length() != 1) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 1 arguments required."));
return;
}
double angle = args[0]->NumberValue();
canvas->rotate(SkRadiansToDegrees(angle));
}
void DrawingMethods::Translate(const v8::FunctionCallbackInfo<v8::Value>& args) {
DrawingMethods* drawingMethods = Unwrap(args.This());
SkCanvas* canvas = drawingMethods->getCanvas();
if (NULL == canvas) {
return;
}
if (args.Length() != 2) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 2 arguments required."));
return;
}
double dx = args[0]->NumberValue();
double dy = args[1]->NumberValue();
canvas->translate(SkDoubleToScalar(dx), SkDoubleToScalar(dy));
}
void DrawingMethods::ResetTransform(const v8::FunctionCallbackInfo<v8::Value>& args) {
DrawingMethods* drawingMethods = Unwrap(args.This());
SkCanvas* canvas = drawingMethods->getCanvas();
if (NULL == canvas) {
return;
}
canvas->resetMatrix();
}
void DrawingMethods::DrawPath(const v8::FunctionCallbackInfo<v8::Value>& args) {
DrawingMethods* drawingMethods = Unwrap(args.This());
SkCanvas* canvas = drawingMethods->getCanvas();
if (NULL == canvas) {
return;
}
if (args.Length() != 1) {
args.GetIsolate()->ThrowException(
v8::String::NewFromUtf8(
args.GetIsolate(), "Error: 1 argument required."));
return;
}
v8::Handle<v8::External> field = v8::Handle<v8::External>::Cast(
args[0]->ToObject()->GetInternalField(0));
void* ptr = field->Value();
Path2D* path = static_cast<Path2D*>(ptr);
if (NULL == path) {
return;
}
// TODO(jcgregorio) Add support for Paint2D parameter after Paint2D is
// implemented.
SkPaint fillStyle;
fillStyle.setColor(SK_ColorBLACK);
fillStyle.setAntiAlias(true);
fillStyle.setStyle(SkPaint::kFill_Style);
canvas->drawPath(*(path->path()), fillStyle);
}
void DrawingMethods::GetWidth(v8::Local<v8::String> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
DrawingMethods* drawingMethods = Unwrap(info.This());
SkCanvas* canvas = drawingMethods->getCanvas();
if (NULL == canvas) {
return;
}
info.GetReturnValue().Set(
v8::Int32::New(
drawingMethods->fGlobal->getIsolate(), canvas->imageInfo().width()));
}
void DrawingMethods::GetHeight(v8::Local<v8::String> name,
const v8::PropertyCallbackInfo<v8::Value>& info) {
DrawingMethods* drawingMethods = Unwrap(info.This());
SkCanvas* canvas = drawingMethods->getCanvas();
if (NULL == canvas) {
return;
}
info.GetReturnValue().Set(
v8::Int32::New(
drawingMethods->fGlobal->getIsolate(), canvas->imageInfo().height()));
}
#define ADD_METHOD(name, fn) \
tmpl->Set(v8::String::NewFromUtf8( \
fGlobal->getIsolate(), name, \
v8::String::kInternalizedString), \
v8::FunctionTemplate::New(fGlobal->getIsolate(), fn))
void DrawingMethods::addAttributesAndMethods(v8::Handle<v8::ObjectTemplate> tmpl) {
v8::HandleScope scope(fGlobal->getIsolate());
// Add accessors for each of the fields of the context object.
tmpl->SetAccessor(v8::String::NewFromUtf8(
fGlobal->getIsolate(), "width", v8::String::kInternalizedString),
GetWidth);
tmpl->SetAccessor(v8::String::NewFromUtf8(
fGlobal->getIsolate(), "height", v8::String::kInternalizedString),
GetHeight);
// Add methods.
ADD_METHOD("save", Save);
ADD_METHOD("restore", Restore);
ADD_METHOD("rotate", Rotate);
ADD_METHOD("translate", Translate);
ADD_METHOD("resetTransform", ResetTransform);
ADD_METHOD("drawPath", DrawPath);
}
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