third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvasModules.cpp

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "modules/offscreencanvas/OffscreenCanvasModules.h"

#include "core/html/canvas/CanvasContextCreationAttributes.h"
#include "core/offscreencanvas/OffscreenCanvas.h"
#include "modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h"

namespace blink {

void OffscreenCanvasModules::getContext(
    ScriptState* scriptState,
    OffscreenCanvas& offscreenCanvas,
    const String& id,
    const CanvasContextCreationAttributes& attributes,
    ExceptionState& exceptionState,
    OffscreenRenderingContext& result) {
  if (offscreenCanvas.isNeutered()) {
    exceptionState.throwDOMException(InvalidStateError,
                                     "OffscreenCanvas object is detached");
    return;
  }

  // OffscreenCanvas cannot be transferred after getContext, so this execution
  // context will always be the right one from here on.
  offscreenCanvas.setExecutionContext(scriptState->getExecutionContext());
  CanvasRenderingContext* context =
      offscreenCanvas.getCanvasRenderingContext(scriptState, id, attributes);
  if (context)
    context->setOffscreenCanvasGetContextResult(result);
}

}  // namespace blink