287 lines
8.9 KiB
C++
287 lines
8.9 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 <v8.h>
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using namespace v8;
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#include "Global.h"
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#include "BaseContext.h"
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#include "Path2D.h"
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#include "SkCanvas.h"
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BaseContext* BaseContext::Unwrap(Handle<Object> obj) {
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Handle<External> field = Handle<External>::Cast(obj->GetInternalField(0));
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void* ptr = field->Value();
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return static_cast<BaseContext*>(ptr);
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}
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void BaseContext::FillRect(const v8::FunctionCallbackInfo<Value>& args) {
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BaseContext* BaseContext = Unwrap(args.This());
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SkCanvas* canvas = BaseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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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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canvas->drawRect(rect, BaseContext->fFillStyle);
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}
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void BaseContext::Save(const v8::FunctionCallbackInfo<Value>& args) {
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BaseContext* BaseContext = Unwrap(args.This());
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SkCanvas* canvas = BaseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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canvas->save();
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}
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void BaseContext::Restore(const v8::FunctionCallbackInfo<Value>& args) {
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BaseContext* BaseContext = Unwrap(args.This());
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SkCanvas* canvas = BaseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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canvas->restore();
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}
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void BaseContext::Rotate(const v8::FunctionCallbackInfo<Value>& args) {
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BaseContext* BaseContext = Unwrap(args.This());
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SkCanvas* canvas = BaseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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if (args.Length() != 1) {
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args.GetIsolate()->ThrowException(
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v8::String::NewFromUtf8(
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args.GetIsolate(), "Error: 1 arguments required."));
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return;
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}
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double angle = args[0]->NumberValue();
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canvas->rotate(SkRadiansToDegrees(angle));
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}
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void BaseContext::Translate(const v8::FunctionCallbackInfo<Value>& args) {
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BaseContext* BaseContext = Unwrap(args.This());
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SkCanvas* canvas = BaseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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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 dx = args[0]->NumberValue();
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double dy = args[1]->NumberValue();
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canvas->translate(SkDoubleToScalar(dx), SkDoubleToScalar(dy));
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}
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void BaseContext::ResetTransform(const v8::FunctionCallbackInfo<Value>& args) {
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BaseContext* BaseContext = Unwrap(args.This());
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SkCanvas* canvas = BaseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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canvas->resetMatrix();
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}
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void BaseContext::Stroke(const v8::FunctionCallbackInfo<Value>& args) {
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BaseContext* BaseContext = Unwrap(args.This());
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SkCanvas* canvas = BaseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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if (args.Length() != 1) {
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args.GetIsolate()->ThrowException(
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v8::String::NewFromUtf8(
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args.GetIsolate(), "Error: 1 arguments required."));
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return;
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}
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Handle<External> field = Handle<External>::Cast(
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args[0]->ToObject()->GetInternalField(0));
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void* ptr = field->Value();
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Path2D* path = static_cast<Path2D*>(ptr);
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canvas->drawPath(path->getSkPath(), BaseContext->fStrokeStyle);
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}
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void BaseContext::Fill(const v8::FunctionCallbackInfo<Value>& args) {
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BaseContext* BaseContext = Unwrap(args.This());
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SkCanvas* canvas = BaseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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if (args.Length() != 1) {
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args.GetIsolate()->ThrowException(
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v8::String::NewFromUtf8(
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args.GetIsolate(), "Error: 1 arguments required."));
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return;
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}
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Handle<External> field = Handle<External>::Cast(
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args[0]->ToObject()->GetInternalField(0));
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void* ptr = field->Value();
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Path2D* path = static_cast<Path2D*>(ptr);
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canvas->drawPath(path->getSkPath(), BaseContext->fFillStyle);
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}
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void BaseContext::GetStyle(Local<String> name,
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const PropertyCallbackInfo<Value>& info,
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const SkPaint& style) {
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char buf[8];
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SkColor color = style.getColor();
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sprintf(buf, "#%02X%02X%02X", SkColorGetR(color), SkColorGetG(color),
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SkColorGetB(color));
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info.GetReturnValue().Set(String::NewFromUtf8(info.GetIsolate(), buf));
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}
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void BaseContext::SetStyle(Local<String> name, Local<Value> value,
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const PropertyCallbackInfo<void>& info,
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SkPaint& style) {
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Local<String> s = value->ToString();
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if (s->Length() != 7 && s->Length() != 9) {
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info.GetIsolate()->ThrowException(
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v8::String::NewFromUtf8(
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info.GetIsolate(),
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"Invalid fill style format length."));
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return;
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}
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char buf[10];
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s->WriteUtf8(buf, sizeof(buf));
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if (buf[0] != '#') {
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info.GetIsolate()->ThrowException(
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v8::String::NewFromUtf8(
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info.GetIsolate(), "Invalid fill style format."));
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return;
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}
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// Colors can be RRGGBBAA, but SkColor uses ARGB.
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long color = strtol(buf+1, NULL, 16);
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uint32_t alpha = SK_AlphaOPAQUE;
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if (s->Length() == 9) {
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alpha = color & 0xFF;
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color >>= 8;
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}
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style.setColor(SkColorSetA(SkColor(color), alpha));
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}
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void BaseContext::GetFillStyle(Local<String> name,
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const PropertyCallbackInfo<Value>& info) {
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BaseContext* baseContext = Unwrap(info.This());
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GetStyle(name, info, baseContext->fFillStyle);
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}
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void BaseContext::GetStrokeStyle(Local<String> name,
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const PropertyCallbackInfo<Value>& info) {
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BaseContext* baseContext = Unwrap(info.This());
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GetStyle(name, info, baseContext->fStrokeStyle);
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}
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void BaseContext::SetFillStyle(Local<String> name, Local<Value> value,
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const PropertyCallbackInfo<void>& info) {
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BaseContext* baseContext = Unwrap(info.This());
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SetStyle(name, value, info, baseContext->fFillStyle);
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}
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void BaseContext::SetStrokeStyle(Local<String> name, Local<Value> value,
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const PropertyCallbackInfo<void>& info) {
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BaseContext* baseContext = Unwrap(info.This());
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SetStyle(name, value, info, baseContext->fStrokeStyle);
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}
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void BaseContext::GetWidth(Local<String> name,
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const PropertyCallbackInfo<Value>& info) {
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BaseContext* baseContext = Unwrap(info.This());
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SkCanvas* canvas = baseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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SkISize size = canvas->getDeviceSize();
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info.GetReturnValue().Set(
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Int32::New(baseContext->fGlobal->getIsolate(), size.fWidth));
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}
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void BaseContext::GetHeight(Local<String> name,
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const PropertyCallbackInfo<Value>& info) {
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BaseContext* baseContext = Unwrap(info.This());
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SkCanvas* canvas = baseContext->getCanvas();
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if (NULL == canvas) {
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return;
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}
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SkISize size = canvas->getDeviceSize();
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info.GetReturnValue().Set(
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Int32::New(baseContext->fGlobal->getIsolate(), size.fHeight));
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}
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#define ADD_METHOD(name, fn) \
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tmpl->Set(String::NewFromUtf8( \
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fGlobal->getIsolate(), name, \
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String::kInternalizedString), \
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FunctionTemplate::New(fGlobal->getIsolate(), fn))
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void BaseContext::addAttributesAndMethods(Handle<ObjectTemplate> tmpl) {
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HandleScope scope(fGlobal->getIsolate());
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// Add accessors for each of the fields of the context object.
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tmpl->SetAccessor(String::NewFromUtf8(
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fGlobal->getIsolate(), "fillStyle", String::kInternalizedString),
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GetFillStyle, SetFillStyle);
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tmpl->SetAccessor(String::NewFromUtf8(
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fGlobal->getIsolate(), "strokeStyle", String::kInternalizedString),
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GetStrokeStyle, SetStrokeStyle);
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tmpl->SetAccessor(String::NewFromUtf8(
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fGlobal->getIsolate(), "width", String::kInternalizedString),
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GetWidth);
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tmpl->SetAccessor(String::NewFromUtf8(
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fGlobal->getIsolate(), "height", String::kInternalizedString),
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GetHeight);
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// Add methods.
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ADD_METHOD("fillRect", FillRect);
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ADD_METHOD("stroke", Stroke);
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ADD_METHOD("fill", Fill);
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ADD_METHOD("rotate", Rotate);
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ADD_METHOD("save", Save);
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ADD_METHOD("restore", Restore);
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ADD_METHOD("translate", Translate);
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ADD_METHOD("resetTransform", ResetTransform);
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}
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