Start moving to the new canvas structure.

experimental/SkV8Example/BaseContext.cpp

-/*
- * 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 "BaseContext.h"
-#include "Path2D.h"
-#include "SkCanvas.h"
-
-
-BaseContext* BaseContext::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<BaseContext*>(ptr);
-}
-
-void BaseContext::FillRect(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    BaseContext* BaseContext = Unwrap(args.This());
-    SkCanvas* canvas = BaseContext->getCanvas();
-    if (NULL == canvas) {
-        return;
-    }
-
-    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)
-    };
-    canvas->drawRect(rect, BaseContext->fFillStyle);
-}
-
-void BaseContext::Save(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    BaseContext* BaseContext = Unwrap(args.This());
-    SkCanvas* canvas = BaseContext->getCanvas();
-    if (NULL == canvas) {
-        return;
-    }
-
-    canvas->save();
-}
-
-void BaseContext::Restore(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    BaseContext* BaseContext = Unwrap(args.This());
-    SkCanvas* canvas = BaseContext->getCanvas();
-    if (NULL == canvas) {
-        return;
-    }
-
-    canvas->restore();
-}
-
-void BaseContext::Rotate(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    BaseContext* BaseContext = Unwrap(args.This());
-    SkCanvas* canvas = BaseContext->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 BaseContext::Translate(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    BaseContext* BaseContext = Unwrap(args.This());
-    SkCanvas* canvas = BaseContext->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 BaseContext::ResetTransform(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    BaseContext* BaseContext = Unwrap(args.This());
-    SkCanvas* canvas = BaseContext->getCanvas();
-    if (NULL == canvas) {
-        return;
-    }
-
-    canvas->resetMatrix();
-}
-
-void BaseContext::Stroke(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    BaseContext* BaseContext = Unwrap(args.This());
-    SkCanvas* canvas = BaseContext->getCanvas();
-    if (NULL == canvas) {
-        return;
-    }
-
-    if (args.Length() != 1) {
-        args.GetIsolate()->ThrowException(
-                v8::String::NewFromUtf8(
-                        args.GetIsolate(), "Error: 1 arguments 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);
-
-    canvas->drawPath(path->getSkPath(), BaseContext->fStrokeStyle);
-}
-
-void BaseContext::Fill(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    BaseContext* BaseContext = Unwrap(args.This());
-    SkCanvas* canvas = BaseContext->getCanvas();
-    if (NULL == canvas) {
-        return;
-    }
-
-    if (args.Length() != 1) {
-        args.GetIsolate()->ThrowException(
-                v8::String::NewFromUtf8(
-                        args.GetIsolate(), "Error: 1 arguments 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);
-
-    canvas->drawPath(path->getSkPath(), BaseContext->fFillStyle);
-}
-
-void BaseContext::GetStyle(v8::Local<v8::String> name,
-                         const v8::PropertyCallbackInfo<v8::Value>& info,
-                         const SkPaint& style) {
-    char buf[8];
-    SkColor color = style.getColor();
-    sprintf(buf, "#%02X%02X%02X", SkColorGetR(color), SkColorGetG(color),
-            SkColorGetB(color));
-
-    info.GetReturnValue().Set(v8::String::NewFromUtf8(info.GetIsolate(), buf));
-}
-
-void BaseContext::SetStyle(v8::Local<v8::String> name, v8::Local<v8::Value> value,
-                         const v8::PropertyCallbackInfo<void>& info,
-                         SkPaint& style) {
-    v8::Local<v8::String> s = value->ToString();
-    if (s->Length() != 7 && s->Length() != 9) {
-        info.GetIsolate()->ThrowException(
-                v8::String::NewFromUtf8(
-                        info.GetIsolate(),
-                        "Invalid fill style format length."));
-        return;
-    }
-    char buf[10];
-    s->WriteUtf8(buf, sizeof(buf));
-
-    if (buf[0] != '#') {
-        info.GetIsolate()->ThrowException(
-                v8::String::NewFromUtf8(
-                        info.GetIsolate(), "Invalid fill style format."));
-        return;
-    }
-
-    // Colors can be RRGGBBAA, but SkColor uses ARGB.
-    long color = strtol(buf+1, NULL, 16);
-    uint32_t alpha = SK_AlphaOPAQUE;
-    if (s->Length() == 9) {
-        alpha = color & 0xFF;
-        color >>= 8;
-    }
-    style.setColor(SkColorSetA(SkColor(color), alpha));
-}
-
-void BaseContext::GetFillStyle(v8::Local<v8::String> name,
-                             const v8::PropertyCallbackInfo<v8::Value>& info) {
-    BaseContext* baseContext = Unwrap(info.This());
-    GetStyle(name, info, baseContext->fFillStyle);
-}
-
-void BaseContext::GetStrokeStyle(v8::Local<v8::String> name,
-                               const v8::PropertyCallbackInfo<v8::Value>& info) {
-    BaseContext* baseContext = Unwrap(info.This());
-    GetStyle(name, info, baseContext->fStrokeStyle);
-}
-
-void BaseContext::SetFillStyle(v8::Local<v8::String> name, v8::Local<v8::Value> value,
-                            const v8::PropertyCallbackInfo<void>& info) {
-    BaseContext* baseContext = Unwrap(info.This());
-    SetStyle(name, value, info, baseContext->fFillStyle);
-}
-
-void BaseContext::SetStrokeStyle(v8::Local<v8::String> name, v8::Local<v8::Value> value,
-                               const v8::PropertyCallbackInfo<void>& info) {
-    BaseContext* baseContext = Unwrap(info.This());
-    SetStyle(name, value, info, baseContext->fStrokeStyle);
-}
-
-
-void BaseContext::GetWidth(v8::Local<v8::String> name,
-                         const v8::PropertyCallbackInfo<v8::Value>& info) {
-    BaseContext* baseContext = Unwrap(info.This());
-    SkCanvas* canvas = baseContext->getCanvas();
-    if (NULL == canvas) {
-        return;
-    }
-    SkISize size = canvas->getDeviceSize();
-
-    info.GetReturnValue().Set(
-            v8::Int32::New(baseContext->fGlobal->getIsolate(), size.fWidth));
-}
-
-void BaseContext::GetHeight(v8::Local<v8::String> name,
-                         const v8::PropertyCallbackInfo<v8::Value>& info) {
-    BaseContext* baseContext = Unwrap(info.This());
-    SkCanvas* canvas = baseContext->getCanvas();
-    if (NULL == canvas) {
-        return;
-    }
-    SkISize size = canvas->getDeviceSize();
-
-    info.GetReturnValue().Set(
-            v8::Int32::New(baseContext->fGlobal->getIsolate(), size.fHeight));
-}
-
-#define ADD_METHOD(name, fn) \
-    tmpl->Set(v8::String::NewFromUtf8( \
-         fGlobal->getIsolate(), name, \
-         v8::String::kInternalizedString), \
-             v8::FunctionTemplate::New(fGlobal->getIsolate(), fn))
-
-void BaseContext::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(), "fillStyle", v8::String::kInternalizedString),
-            GetFillStyle, SetFillStyle);
-    tmpl->SetAccessor(v8::String::NewFromUtf8(
-        fGlobal->getIsolate(), "strokeStyle", v8::String::kInternalizedString),
-            GetStrokeStyle, SetStrokeStyle);
-    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("fillRect", FillRect);
-    ADD_METHOD("stroke", Stroke);
-    ADD_METHOD("fill", Fill);
-    ADD_METHOD("rotate", Rotate);
-    ADD_METHOD("save", Save);
-    ADD_METHOD("restore", Restore);
-    ADD_METHOD("translate", Translate);
-    ADD_METHOD("resetTransform", ResetTransform);
-}