/*

 * Copyright (C) 2007 Apple Inc. All rights reserved.

 * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#include "config.h"

#include "JSHTMLCanvasElement.h"

#include "CanvasContextAttributes.h"

#include "HTMLCanvasElement.h"

#include "JSCanvasRenderingContext2D.h"

#if ENABLE(3D_CANVAS)

#include "JSWebGLRenderingContext.h"

#include "WebGLContextAttributes.h"

#endif

#include <wtf/GetPtr.h>

using namespace JSC;

namespace WebCore {

void JSHTMLCanvasElement::markChildren(MarkStack& markStack)

{

    Base::markChildren(markStack);

    HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(impl());

    JSGlobalData& globalData = *Heap::heap(this)->globalData();

    markDOMObjectWrapper(markStack, globalData, canvas->renderingContext());

}

JSValue JSHTMLCanvasElement::getContext(ExecState* exec)

{

    HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(impl());

    const UString& contextId = exec->argument(0).toString(exec);

    RefPtr<CanvasContextAttributes> attrs;

#if ENABLE(3D_CANVAS)

    if (contextId == "experimental-webgl" || contextId == "webkit-3d") {

        attrs = WebGLContextAttributes::create();

        WebGLContextAttributes* webGLAttrs = static_cast<WebGLContextAttributes*>(attrs.get());

        if (exec->argumentCount() > 1 && exec->argument(1).isObject()) {

            JSObject* jsAttrs = exec->argument(1).getObject();

            Identifier alpha(exec, "alpha");

            if (jsAttrs->hasProperty(exec, alpha))

                webGLAttrs->setAlpha(jsAttrs->get(exec, alpha).toBoolean(exec));

            Identifier depth(exec, "depth");

            if (jsAttrs->hasProperty(exec, depth))

                webGLAttrs->setDepth(jsAttrs->get(exec, depth).toBoolean(exec));

            Identifier stencil(exec, "stencil");

            if (jsAttrs->hasProperty(exec, stencil))

                webGLAttrs->setStencil(jsAttrs->get(exec, stencil).toBoolean(exec));

            Identifier antialias(exec, "antialias");

            if (jsAttrs->hasProperty(exec, antialias))

                webGLAttrs->setAntialias(jsAttrs->get(exec, antialias).toBoolean(exec));

            Identifier premultipliedAlpha(exec, "premultipliedAlpha");

            if (jsAttrs->hasProperty(exec, premultipliedAlpha))

                webGLAttrs->setPremultipliedAlpha(jsAttrs->get(exec, premultipliedAlpha).toBoolean(exec));

        }

    }

#endif

    CanvasRenderingContext* context = canvas->getContext(ustringToString(contextId), attrs.get());

    if (!context)

        return jsNull();

    return toJS(exec, globalObject(), WTF::getPtr(context));

}

JSValue JSHTMLCanvasElement::toDataURL(ExecState* exec)

{

    const String& type = valueToStringWithUndefinedOrNullCheck(exec, exec->argument(0));

    HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(impl());

    ExceptionCode ec = 0;

    JSC::JSValue result;

    double quality;

    double* qualityPtr = 0;

    if (exec->argumentCount() > 1) {

        JSValue v = exec->argument(1);

        if (v.isNumber()) {

            quality = v.toNumber(exec);

            qualityPtr = &quality;

        }

    }

    result = jsString(exec, canvas->toDataURL(type, qualityPtr, ec));

    setDOMException(exec, ec);

    return result;

}

} // namespace WebCore