Source/WebCore/html/OffscreenCanvas.idl

/*
* Copyright (C) 2017 Apple Inc. 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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.
*/

typedef (
#if defined(ENABLE_WEBGL) && ENABLE_WEBGL
    WebGLRenderingContext or
#endif
#if defined(ENABLE_WEBGL2) && ENABLE_WEBGL2
    WebGL2RenderingContext or
#endif
    OffscreenCanvasRenderingContext2D) OffscreenRenderingContext;

dictionary ImageEncodeOptions
{
   DOMString type = "image/png";
   unrestricted double quality = 1.0;
};

enum OffscreenRenderingContextType
{
   "2d",
   "webgl",
   "webgl2"
};

[
    GenerateIsReachable=Impl,
    EnabledAtRuntime=OffscreenCanvasEnabled,
    Conditional=OFFSCREEN_CANVAS,
    ConditionalForWorker=OFFSCREEN_CANVAS_IN_WORKERS,
    EnabledForContext,
    Exposed=(Window,Worker)
] interface OffscreenCanvas : EventTarget {
    [CallWith=ScriptExecutionContext] constructor([EnforceRange] unsigned long width, [EnforceRange] unsigned long height);

    attribute [EnforceRange] unsigned long width;
    attribute [EnforceRange] unsigned long height;

    [CallWith=GlobalObject] OffscreenRenderingContext? getContext(OffscreenRenderingContextType contextType, any... arguments);
    ImageBitmap transferToImageBitmap();
    Promise<Blob> convertToBlob(optional ImageEncodeOptions options);

};