| // 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/canvas/HTMLCanvasElementModule.h" |
| |
| #include "core/html/canvas/CanvasContextCreationAttributes.h" |
| #include "core/html/canvas/CanvasRenderingContext.h" |
| |
| namespace blink { |
| |
| void HTMLCanvasElementModule::getContext(HTMLCanvasElement& canvas, const String& type, const CanvasContextCreationAttributes& attributes, RenderingContext& result) |
| { |
| CanvasRenderingContext* context = canvas.getCanvasRenderingContext(type, attributes); |
| if (context) { |
| context->setCanvasGetContextResult(result); |
| } |
| } |
| |
| OffscreenCanvas* HTMLCanvasElementModule::transferControlToOffscreen(HTMLCanvasElement& canvas, ExceptionState& exceptionState) |
| { |
| if (canvas.renderingContext()) { |
| exceptionState.throwDOMException(InvalidStateError, "Cannot transfer control from a canvas that has a rendering context."); |
| return nullptr; |
| } |
| OffscreenCanvas* offscreenCanvas = OffscreenCanvas::create(canvas.width(), canvas.height()); |
| offscreenCanvas->setAssociatedCanvas(&canvas); |
| return offscreenCanvas; |
| } |
| |
| } |