1/*
2 This file is part of the WebKit open source project.
3 This file has been generated by generate-bindings.pl. DO NOT MODIFY!
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public License
16 along with this library; see the file COPYING.LIB. If not, write to
17 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
19*/
20
21#include "config.h"
22#include "JSHTMLCanvasElement.h"
23
24#include "CallTracer.h"
25#include "CustomElementReactionQueue.h"
26#include "JSBlobCallback.h"
27#include "JSCanvasRenderingContext2D.h"
28#include "JSDOMAttribute.h"
29#include "JSDOMBinding.h"
30#include "JSDOMConstructorNotConstructable.h"
31#include "JSDOMConvertAny.h"
32#include "JSDOMConvertCallbacks.h"
33#include "JSDOMConvertInterface.h"
34#include "JSDOMConvertNullable.h"
35#include "JSDOMConvertNumbers.h"
36#include "JSDOMConvertStrings.h"
37#include "JSDOMConvertUnion.h"
38#include "JSDOMConvertVariadic.h"
39#include "JSDOMExceptionHandling.h"
40#include "JSDOMGlobalObject.h"
41#include "JSDOMOperation.h"
42#include "JSDOMWrapperCache.h"
43#include "JSImageBitmapRenderingContext.h"
44#include "JSWebGLRenderingContext.h"
45#include "ScriptExecutionContext.h"
46#include <JavaScriptCore/HeapSnapshotBuilder.h>
47#include <JavaScriptCore/JSCInlines.h>
48#include <wtf/GetPtr.h>
49#include <wtf/PointerPreparations.h>
50#include <wtf/URL.h>
51#include <wtf/Variant.h>
52
53#if ENABLE(MEDIA_STREAM)
54#include "JSMediaStream.h"
55#endif
56
57
58namespace WebCore {
59using namespace JSC;
60
61// Functions
62
63JSC::EncodedJSValue JSC_HOST_CALL jsHTMLCanvasElementPrototypeFunctionGetContext(JSC::ExecState*);
64JSC::EncodedJSValue JSC_HOST_CALL jsHTMLCanvasElementPrototypeFunctionToDataURL(JSC::ExecState*);
65JSC::EncodedJSValue JSC_HOST_CALL jsHTMLCanvasElementPrototypeFunctionToBlob(JSC::ExecState*);
66#if ENABLE(MEDIA_STREAM)
67JSC::EncodedJSValue JSC_HOST_CALL jsHTMLCanvasElementPrototypeFunctionCaptureStream(JSC::ExecState*);
68#endif
69
70// Attributes
71
72JSC::EncodedJSValue jsHTMLCanvasElementConstructor(JSC::ExecState*, JSC::EncodedJSValue, JSC::PropertyName);
73bool setJSHTMLCanvasElementConstructor(JSC::ExecState*, JSC::EncodedJSValue, JSC::EncodedJSValue);
74JSC::EncodedJSValue jsHTMLCanvasElementWidth(JSC::ExecState*, JSC::EncodedJSValue, JSC::PropertyName);
75bool setJSHTMLCanvasElementWidth(JSC::ExecState*, JSC::EncodedJSValue, JSC::EncodedJSValue);
76JSC::EncodedJSValue jsHTMLCanvasElementHeight(JSC::ExecState*, JSC::EncodedJSValue, JSC::PropertyName);
77bool setJSHTMLCanvasElementHeight(JSC::ExecState*, JSC::EncodedJSValue, JSC::EncodedJSValue);
78
79class JSHTMLCanvasElementPrototype : public JSC::JSNonFinalObject {
80public:
81 using Base = JSC::JSNonFinalObject;
82 static JSHTMLCanvasElementPrototype* create(JSC::VM& vm, JSDOMGlobalObject* globalObject, JSC::Structure* structure)
83 {
84 JSHTMLCanvasElementPrototype* ptr = new (NotNull, JSC::allocateCell<JSHTMLCanvasElementPrototype>(vm.heap)) JSHTMLCanvasElementPrototype(vm, globalObject, structure);
85 ptr->finishCreation(vm);
86 return ptr;
87 }
88
89 DECLARE_INFO;
90 static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
91 {
92 return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
93 }
94
95private:
96 JSHTMLCanvasElementPrototype(JSC::VM& vm, JSC::JSGlobalObject*, JSC::Structure* structure)
97 : JSC::JSNonFinalObject(vm, structure)
98 {
99 }
100
101 void finishCreation(JSC::VM&);
102};
103
104using JSHTMLCanvasElementConstructor = JSDOMConstructorNotConstructable<JSHTMLCanvasElement>;
105
106template<> JSValue JSHTMLCanvasElementConstructor::prototypeForStructure(JSC::VM& vm, const JSDOMGlobalObject& globalObject)
107{
108 return JSHTMLElement::getConstructor(vm, &globalObject);
109}
110
111template<> void JSHTMLCanvasElementConstructor::initializeProperties(VM& vm, JSDOMGlobalObject& globalObject)
112{
113 putDirect(vm, vm.propertyNames->prototype, JSHTMLCanvasElement::prototype(vm, globalObject), JSC::PropertyAttribute::DontDelete | JSC::PropertyAttribute::ReadOnly | JSC::PropertyAttribute::DontEnum);
114 putDirect(vm, vm.propertyNames->name, jsNontrivialString(&vm, String("HTMLCanvasElement"_s)), JSC::PropertyAttribute::ReadOnly | JSC::PropertyAttribute::DontEnum);
115 putDirect(vm, vm.propertyNames->length, jsNumber(0), JSC::PropertyAttribute::ReadOnly | JSC::PropertyAttribute::DontEnum);
116}
117
118template<> const ClassInfo JSHTMLCanvasElementConstructor::s_info = { "HTMLCanvasElement", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSHTMLCanvasElementConstructor) };
119
120/* Hash table for prototype */
121
122static const HashTableValue JSHTMLCanvasElementPrototypeTableValues[] =
123{
124 { "constructor", static_cast<unsigned>(JSC::PropertyAttribute::DontEnum), NoIntrinsic, { (intptr_t)static_cast<PropertySlot::GetValueFunc>(jsHTMLCanvasElementConstructor), (intptr_t) static_cast<PutPropertySlot::PutValueFunc>(setJSHTMLCanvasElementConstructor) } },
125 { "width", static_cast<unsigned>(JSC::PropertyAttribute::CustomAccessor | JSC::PropertyAttribute::DOMAttribute), NoIntrinsic, { (intptr_t)static_cast<PropertySlot::GetValueFunc>(jsHTMLCanvasElementWidth), (intptr_t) static_cast<PutPropertySlot::PutValueFunc>(setJSHTMLCanvasElementWidth) } },
126 { "height", static_cast<unsigned>(JSC::PropertyAttribute::CustomAccessor | JSC::PropertyAttribute::DOMAttribute), NoIntrinsic, { (intptr_t)static_cast<PropertySlot::GetValueFunc>(jsHTMLCanvasElementHeight), (intptr_t) static_cast<PutPropertySlot::PutValueFunc>(setJSHTMLCanvasElementHeight) } },
127 { "getContext", static_cast<unsigned>(JSC::PropertyAttribute::Function), NoIntrinsic, { (intptr_t)static_cast<RawNativeFunction>(jsHTMLCanvasElementPrototypeFunctionGetContext), (intptr_t) (1) } },
128 { "toDataURL", static_cast<unsigned>(JSC::PropertyAttribute::Function), NoIntrinsic, { (intptr_t)static_cast<RawNativeFunction>(jsHTMLCanvasElementPrototypeFunctionToDataURL), (intptr_t) (0) } },
129 { "toBlob", static_cast<unsigned>(JSC::PropertyAttribute::Function), NoIntrinsic, { (intptr_t)static_cast<RawNativeFunction>(jsHTMLCanvasElementPrototypeFunctionToBlob), (intptr_t) (1) } },
130#if ENABLE(MEDIA_STREAM)
131 { "captureStream", static_cast<unsigned>(JSC::PropertyAttribute::Function), NoIntrinsic, { (intptr_t)static_cast<RawNativeFunction>(jsHTMLCanvasElementPrototypeFunctionCaptureStream), (intptr_t) (0) } },
132#else
133 { 0, 0, NoIntrinsic, { 0, 0 } },
134#endif
135};
136
137const ClassInfo JSHTMLCanvasElementPrototype::s_info = { "HTMLCanvasElementPrototype", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSHTMLCanvasElementPrototype) };
138
139void JSHTMLCanvasElementPrototype::finishCreation(VM& vm)
140{
141 Base::finishCreation(vm);
142 reifyStaticProperties(vm, JSHTMLCanvasElement::info(), JSHTMLCanvasElementPrototypeTableValues, *this);
143}
144
145const ClassInfo JSHTMLCanvasElement::s_info = { "HTMLCanvasElement", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSHTMLCanvasElement) };
146
147JSHTMLCanvasElement::JSHTMLCanvasElement(Structure* structure, JSDOMGlobalObject& globalObject, Ref<HTMLCanvasElement>&& impl)
148 : JSHTMLElement(structure, globalObject, WTFMove(impl))
149{
150}
151
152void JSHTMLCanvasElement::finishCreation(VM& vm)
153{
154 Base::finishCreation(vm);
155 ASSERT(inherits(vm, info()));
156
157}
158
159JSObject* JSHTMLCanvasElement::createPrototype(VM& vm, JSDOMGlobalObject& globalObject)
160{
161 return JSHTMLCanvasElementPrototype::create(vm, &globalObject, JSHTMLCanvasElementPrototype::createStructure(vm, &globalObject, JSHTMLElement::prototype(vm, globalObject)));
162}
163
164JSObject* JSHTMLCanvasElement::prototype(VM& vm, JSDOMGlobalObject& globalObject)
165{
166 return getDOMPrototype<JSHTMLCanvasElement>(vm, globalObject);
167}
168
169JSValue JSHTMLCanvasElement::getConstructor(VM& vm, const JSGlobalObject* globalObject)
170{
171 return getDOMConstructor<JSHTMLCanvasElementConstructor>(vm, *jsCast<const JSDOMGlobalObject*>(globalObject));
172}
173
174template<> inline JSHTMLCanvasElement* IDLAttribute<JSHTMLCanvasElement>::cast(ExecState& state, EncodedJSValue thisValue)
175{
176 return jsDynamicCast<JSHTMLCanvasElement*>(state.vm(), JSValue::decode(thisValue));
177}
178
179template<> inline JSHTMLCanvasElement* IDLOperation<JSHTMLCanvasElement>::cast(ExecState& state)
180{
181 return jsDynamicCast<JSHTMLCanvasElement*>(state.vm(), state.thisValue());
182}
183
184EncodedJSValue jsHTMLCanvasElementConstructor(ExecState* state, EncodedJSValue thisValue, PropertyName)
185{
186 VM& vm = state->vm();
187 auto throwScope = DECLARE_THROW_SCOPE(vm);
188 auto* prototype = jsDynamicCast<JSHTMLCanvasElementPrototype*>(vm, JSValue::decode(thisValue));
189 if (UNLIKELY(!prototype))
190 return throwVMTypeError(state, throwScope);
191 return JSValue::encode(JSHTMLCanvasElement::getConstructor(state->vm(), prototype->globalObject()));
192}
193
194bool setJSHTMLCanvasElementConstructor(ExecState* state, EncodedJSValue thisValue, EncodedJSValue encodedValue)
195{
196 VM& vm = state->vm();
197 auto throwScope = DECLARE_THROW_SCOPE(vm);
198 auto* prototype = jsDynamicCast<JSHTMLCanvasElementPrototype*>(vm, JSValue::decode(thisValue));
199 if (UNLIKELY(!prototype)) {
200 throwVMTypeError(state, throwScope);
201 return false;
202 }
203 // Shadowing a built-in constructor
204 return prototype->putDirect(vm, vm.propertyNames->constructor, JSValue::decode(encodedValue));
205}
206
207static inline JSValue jsHTMLCanvasElementWidthGetter(ExecState& state, JSHTMLCanvasElement& thisObject, ThrowScope& throwScope)
208{
209 UNUSED_PARAM(throwScope);
210 UNUSED_PARAM(state);
211 auto& impl = thisObject.wrapped();
212 if (UNLIKELY(impl.callTracingActive()))
213 CallTracer::recordCanvasAction(impl, "width"_s);
214 JSValue result = toJS<IDLUnsignedLong>(state, throwScope, impl.width());
215 return result;
216}
217
218EncodedJSValue jsHTMLCanvasElementWidth(ExecState* state, EncodedJSValue thisValue, PropertyName)
219{
220 return IDLAttribute<JSHTMLCanvasElement>::get<jsHTMLCanvasElementWidthGetter, CastedThisErrorBehavior::Assert>(*state, thisValue, "width");
221}
222
223static inline bool setJSHTMLCanvasElementWidthSetter(ExecState& state, JSHTMLCanvasElement& thisObject, JSValue value, ThrowScope& throwScope)
224{
225 UNUSED_PARAM(throwScope);
226 CustomElementReactionDisallowedScope customElementReactionDisallowedScope;
227 auto& impl = thisObject.wrapped();
228 auto nativeValue = convert<IDLUnsignedLong>(state, value);
229 RETURN_IF_EXCEPTION(throwScope, false);
230 if (UNLIKELY(impl.callTracingActive())) {
231 Vector<RecordCanvasActionVariant> callTracerParameters;
232 callTracerParameters.append(nativeValue);
233 CallTracer::recordCanvasAction(impl, "width"_s, WTFMove(callTracerParameters));
234 }
235 AttributeSetter::call(state, throwScope, [&] {
236 return impl.setWidth(WTFMove(nativeValue));
237 });
238 return true;
239}
240
241bool setJSHTMLCanvasElementWidth(ExecState* state, EncodedJSValue thisValue, EncodedJSValue encodedValue)
242{
243 return IDLAttribute<JSHTMLCanvasElement>::set<setJSHTMLCanvasElementWidthSetter>(*state, thisValue, encodedValue, "width");
244}
245
246static inline JSValue jsHTMLCanvasElementHeightGetter(ExecState& state, JSHTMLCanvasElement& thisObject, ThrowScope& throwScope)
247{
248 UNUSED_PARAM(throwScope);
249 UNUSED_PARAM(state);
250 auto& impl = thisObject.wrapped();
251 if (UNLIKELY(impl.callTracingActive()))
252 CallTracer::recordCanvasAction(impl, "height"_s);
253 JSValue result = toJS<IDLUnsignedLong>(state, throwScope, impl.height());
254 return result;
255}
256
257EncodedJSValue jsHTMLCanvasElementHeight(ExecState* state, EncodedJSValue thisValue, PropertyName)
258{
259 return IDLAttribute<JSHTMLCanvasElement>::get<jsHTMLCanvasElementHeightGetter, CastedThisErrorBehavior::Assert>(*state, thisValue, "height");
260}
261
262static inline bool setJSHTMLCanvasElementHeightSetter(ExecState& state, JSHTMLCanvasElement& thisObject, JSValue value, ThrowScope& throwScope)
263{
264 UNUSED_PARAM(throwScope);
265 CustomElementReactionDisallowedScope customElementReactionDisallowedScope;
266 auto& impl = thisObject.wrapped();
267 auto nativeValue = convert<IDLUnsignedLong>(state, value);
268 RETURN_IF_EXCEPTION(throwScope, false);
269 if (UNLIKELY(impl.callTracingActive())) {
270 Vector<RecordCanvasActionVariant> callTracerParameters;
271 callTracerParameters.append(nativeValue);
272 CallTracer::recordCanvasAction(impl, "height"_s, WTFMove(callTracerParameters));
273 }
274 AttributeSetter::call(state, throwScope, [&] {
275 return impl.setHeight(WTFMove(nativeValue));
276 });
277 return true;
278}
279
280bool setJSHTMLCanvasElementHeight(ExecState* state, EncodedJSValue thisValue, EncodedJSValue encodedValue)
281{
282 return IDLAttribute<JSHTMLCanvasElement>::set<setJSHTMLCanvasElementHeightSetter>(*state, thisValue, encodedValue, "height");
283}
284
285static inline JSC::EncodedJSValue jsHTMLCanvasElementPrototypeFunctionGetContextBody(JSC::ExecState* state, typename IDLOperation<JSHTMLCanvasElement>::ClassParameter castedThis, JSC::ThrowScope& throwScope)
286{
287 UNUSED_PARAM(state);
288 UNUSED_PARAM(throwScope);
289 auto& impl = castedThis->wrapped();
290 if (UNLIKELY(state->argumentCount() < 1))
291 return throwVMError(state, throwScope, createNotEnoughArgumentsError(state));
292 auto contextId = convert<IDLDOMString>(*state, state->uncheckedArgument(0));
293 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
294 auto arguments = convertVariadicArguments<IDLAny>(*state, 1);
295 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
296 return JSValue::encode(toJS<IDLNullable<IDLUnion<IDLInterface<WebGLRenderingContext>, IDLInterface<ImageBitmapRenderingContext>, IDLInterface<CanvasRenderingContext2D>>>>(*state, *castedThis->globalObject(), throwScope, impl.getContext(*state, WTFMove(contextId), WTFMove(arguments))));
297}
298
299EncodedJSValue JSC_HOST_CALL jsHTMLCanvasElementPrototypeFunctionGetContext(ExecState* state)
300{
301 return IDLOperation<JSHTMLCanvasElement>::call<jsHTMLCanvasElementPrototypeFunctionGetContextBody>(*state, "getContext");
302}
303
304static inline JSC::EncodedJSValue jsHTMLCanvasElementPrototypeFunctionToDataURLBody(JSC::ExecState* state, typename IDLOperation<JSHTMLCanvasElement>::ClassParameter castedThis, JSC::ThrowScope& throwScope)
305{
306 UNUSED_PARAM(state);
307 UNUSED_PARAM(throwScope);
308 auto& impl = castedThis->wrapped();
309 auto type = state->argument(0).isUndefined() ? String() : convert<IDLDOMString>(*state, state->uncheckedArgument(0));
310 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
311 auto quality = convert<IDLAny>(*state, state->argument(1));
312 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
313 return JSValue::encode(toJS<IDLDOMString>(*state, throwScope, impl.toDataURL(WTFMove(type), WTFMove(quality))));
314}
315
316EncodedJSValue JSC_HOST_CALL jsHTMLCanvasElementPrototypeFunctionToDataURL(ExecState* state)
317{
318 return IDLOperation<JSHTMLCanvasElement>::call<jsHTMLCanvasElementPrototypeFunctionToDataURLBody>(*state, "toDataURL");
319}
320
321static inline JSC::EncodedJSValue jsHTMLCanvasElementPrototypeFunctionToBlobBody(JSC::ExecState* state, typename IDLOperation<JSHTMLCanvasElement>::ClassParameter castedThis, JSC::ThrowScope& throwScope)
322{
323 UNUSED_PARAM(state);
324 UNUSED_PARAM(throwScope);
325 auto& impl = castedThis->wrapped();
326 if (UNLIKELY(state->argumentCount() < 1))
327 return throwVMError(state, throwScope, createNotEnoughArgumentsError(state));
328 auto* context = jsCast<JSDOMGlobalObject*>(state->lexicalGlobalObject())->scriptExecutionContext();
329 if (UNLIKELY(!context))
330 return JSValue::encode(jsUndefined());
331 auto callback = convert<IDLCallbackFunction<JSBlobCallback>>(*state, state->uncheckedArgument(0), *castedThis->globalObject(), [](JSC::ExecState& state, JSC::ThrowScope& scope) { throwArgumentMustBeFunctionError(state, scope, 0, "callback", "HTMLCanvasElement", "toBlob"); });
332 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
333 auto type = state->argument(1).isUndefined() ? String() : convert<IDLDOMString>(*state, state->uncheckedArgument(1));
334 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
335 auto quality = convert<IDLAny>(*state, state->argument(2));
336 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
337 propagateException(*state, throwScope, impl.toBlob(*context, callback.releaseNonNull(), WTFMove(type), WTFMove(quality)));
338 return JSValue::encode(jsUndefined());
339}
340
341EncodedJSValue JSC_HOST_CALL jsHTMLCanvasElementPrototypeFunctionToBlob(ExecState* state)
342{
343 return IDLOperation<JSHTMLCanvasElement>::call<jsHTMLCanvasElementPrototypeFunctionToBlobBody>(*state, "toBlob");
344}
345
346#if ENABLE(MEDIA_STREAM)
347static inline JSC::EncodedJSValue jsHTMLCanvasElementPrototypeFunctionCaptureStreamBody(JSC::ExecState* state, typename IDLOperation<JSHTMLCanvasElement>::ClassParameter castedThis, JSC::ThrowScope& throwScope)
348{
349 UNUSED_PARAM(state);
350 UNUSED_PARAM(throwScope);
351 auto& impl = castedThis->wrapped();
352 auto* context = jsCast<JSDOMGlobalObject*>(state->lexicalGlobalObject())->scriptExecutionContext();
353 if (UNLIKELY(!context))
354 return JSValue::encode(jsUndefined());
355 auto frameRequestRate = state->argument(0).isUndefined() ? Optional<Converter<IDLDouble>::ReturnType>() : Optional<Converter<IDLDouble>::ReturnType>(convert<IDLDouble>(*state, state->uncheckedArgument(0)));
356 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
357 return JSValue::encode(toJSNewlyCreated<IDLInterface<MediaStream>>(*state, *castedThis->globalObject(), throwScope, impl.captureStream(*context, WTFMove(frameRequestRate))));
358}
359
360EncodedJSValue JSC_HOST_CALL jsHTMLCanvasElementPrototypeFunctionCaptureStream(ExecState* state)
361{
362 return IDLOperation<JSHTMLCanvasElement>::call<jsHTMLCanvasElementPrototypeFunctionCaptureStreamBody>(*state, "captureStream");
363}
364
365#endif
366
367void JSHTMLCanvasElement::visitChildren(JSCell* cell, SlotVisitor& visitor)
368{
369 auto* thisObject = jsCast<JSHTMLCanvasElement*>(cell);
370 ASSERT_GC_OBJECT_INHERITS(thisObject, info());
371 Base::visitChildren(thisObject, visitor);
372 visitor.reportExtraMemoryVisited(thisObject->wrapped().memoryCost());
373#if ENABLE(RESOURCE_USAGE)
374 visitor.reportExternalMemoryVisited(thisObject->wrapped().externalMemoryCost());
375#endif
376}
377
378size_t JSHTMLCanvasElement::estimatedSize(JSCell* cell, VM& vm)
379{
380 auto* thisObject = jsCast<JSHTMLCanvasElement*>(cell);
381 return Base::estimatedSize(thisObject, vm) + thisObject->wrapped().memoryCost();
382}
383
384void JSHTMLCanvasElement::heapSnapshot(JSCell* cell, HeapSnapshotBuilder& builder)
385{
386 auto* thisObject = jsCast<JSHTMLCanvasElement*>(cell);
387 builder.setWrappedObjectForCell(cell, &thisObject->wrapped());
388 if (thisObject->scriptExecutionContext())
389 builder.setLabelForCell(cell, "url " + thisObject->scriptExecutionContext()->url().string());
390 Base::heapSnapshot(cell, builder);
391}
392
393HTMLCanvasElement* JSHTMLCanvasElement::toWrapped(JSC::VM& vm, JSC::JSValue value)
394{
395 if (auto* wrapper = jsDynamicCast<JSHTMLCanvasElement*>(vm, value))
396 return &wrapper->wrapped();
397 return nullptr;
398}
399
400}
401