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/*
* 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 "InspectorCanvasInstrumentation.h"
#include "JSCanvasRenderingContext2D.h"
#include "ScriptObject.h"
#if ENABLE(WEBGL)
#include "JSDictionary.h"
#include "JSWebGLRenderingContext.h"
#include "WebGLContextAttributes.h"
#endif
#include <wtf/GetPtr.h>
using namespace JSC;
namespace WebCore {
#if ENABLE(WEBGL)
static void get3DContextAttributes(ExecState* exec, RefPtr<CanvasContextAttributes>& attrs)
{
JSValue initializerValue = exec->argument(1);
if (initializerValue.isUndefinedOrNull())
return;
JSObject* initializerObject = initializerValue.toObject(exec);
JSDictionary dictionary(exec, initializerObject);
GraphicsContext3D::Attributes graphicsAttrs;
dictionary.tryGetProperty("alpha", graphicsAttrs.alpha);
dictionary.tryGetProperty("depth", graphicsAttrs.depth);
dictionary.tryGetProperty("stencil", graphicsAttrs.stencil);
dictionary.tryGetProperty("antialias", graphicsAttrs.antialias);
dictionary.tryGetProperty("premultipliedAlpha", graphicsAttrs.premultipliedAlpha);
dictionary.tryGetProperty("preserveDrawingBuffer", graphicsAttrs.preserveDrawingBuffer);
attrs = WebGLContextAttributes::create(graphicsAttrs);
}
#endif
JSValue JSHTMLCanvasElement::getContext(ExecState* exec)
{
HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(impl());
const String& contextId = exec->argument(0).toString(exec)->value(exec);
RefPtr<CanvasContextAttributes> attrs;
#if ENABLE(WEBGL)
if (HTMLCanvasElement::is3dType(contextId)) {
get3DContextAttributes(exec, attrs);
if (exec->hadException())
return jsUndefined();
}
#endif
CanvasRenderingContext* context = canvas->getContext(contextId, attrs.get());
if (!context)
return jsNull();
JSValue jsValue = toJS(exec, globalObject(), WTF::getPtr(context));
if (InspectorInstrumentation::canvasAgentEnabled(canvas->document())) {
ScriptObject contextObject(exec, jsValue.getObject());
ScriptObject wrapped;
if (context->is2d())
wrapped = InspectorInstrumentation::wrapCanvas2DRenderingContextForInstrumentation(canvas->document(), contextObject);
#if ENABLE(WEBGL)
else if (context->is3d())
wrapped = InspectorInstrumentation::wrapWebGLRenderingContextForInstrumentation(canvas->document(), contextObject);
#endif
if (!wrapped.hasNoValue())
return wrapped.jsValue();
}
return jsValue;
}
JSValue JSHTMLCanvasElement::supportsContext(ExecState* exec)
{
HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(impl());
if (!exec->argumentCount())
return jsBoolean(false);
const String& contextId = exec->argument(0).toString(exec)->value(exec);
if (exec->hadException())
return jsUndefined();
RefPtr<CanvasContextAttributes> attrs;
#if ENABLE(WEBGL)
if (HTMLCanvasElement::is3dType(contextId)) {
get3DContextAttributes(exec, attrs);
if (exec->hadException())
return jsUndefined();
}
#endif
return jsBoolean(canvas->supportsContext(contextId, attrs.get()));
}
JSValue JSHTMLCanvasElement::toDataURL(ExecState* exec)
{
HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(impl());
ExceptionCode ec = 0;
const String& type = valueToStringWithUndefinedOrNullCheck(exec, exec->argument(0));
double quality;
double* qualityPtr = 0;
if (exec->argumentCount() > 1) {
JSValue v = exec->argument(1);
if (v.isNumber()) {
quality = v.toNumber(exec);
qualityPtr = &quality;
}
}
JSValue result = JSC::jsString(exec, canvas->toDataURL(type, qualityPtr, ec));
setDOMException(exec, ec);
return result;
}
} // namespace WebCore
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