1 | /* |
2 | * Copyright (C) 2017 Apple Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * 1. Redistributions of source code must retain the above copyright |
8 | * notice, this list of conditions and the following disclaimer. |
9 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
14 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
15 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
17 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
18 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
19 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
20 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
21 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
22 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
23 | * THE POSSIBILITY OF SUCH DAMAGE. |
24 | */ |
25 | |
26 | #pragma once |
27 | |
28 | #include "AffineTransform.h" |
29 | #include "CanvasBase.h" |
30 | #include "EventTarget.h" |
31 | #include "ExceptionOr.h" |
32 | #include "IntSize.h" |
33 | #include "JSDOMPromiseDeferred.h" |
34 | #include "ScriptWrappable.h" |
35 | #include <wtf/Forward.h> |
36 | #include <wtf/RefCounted.h> |
37 | #include <wtf/text/WTFString.h> |
38 | |
39 | namespace WebCore { |
40 | |
41 | class ImageBitmap; |
42 | class WebGLRenderingContext; |
43 | |
44 | #if ENABLE(WEBGL) |
45 | using OffscreenRenderingContext = RefPtr<WebGLRenderingContext>; |
46 | #endif |
47 | |
48 | class OffscreenCanvas final : public RefCounted<OffscreenCanvas>, public CanvasBase, public EventTargetWithInlineData, private ContextDestructionObserver { |
49 | WTF_MAKE_ISO_ALLOCATED(OffscreenCanvas); |
50 | public: |
51 | |
52 | struct ImageEncodeOptions { |
53 | String type = "image/png" ; |
54 | double quality = 1.0; |
55 | }; |
56 | |
57 | enum class RenderingContextType { |
58 | _2d, |
59 | Webgl |
60 | }; |
61 | |
62 | static Ref<OffscreenCanvas> create(ScriptExecutionContext&, unsigned width, unsigned height); |
63 | virtual ~OffscreenCanvas(); |
64 | |
65 | unsigned width() const final; |
66 | void setWidth(unsigned); |
67 | unsigned height() const final; |
68 | void setHeight(unsigned); |
69 | |
70 | const IntSize& size() const final; |
71 | void setSize(const IntSize&) final; |
72 | |
73 | #if ENABLE(WEBGL) |
74 | ExceptionOr<OffscreenRenderingContext> getContext(JSC::ExecState&, RenderingContextType, Vector<JSC::Strong<JSC::Unknown>>&& arguments); |
75 | #endif |
76 | RefPtr<ImageBitmap> transferToImageBitmap(); |
77 | // void convertToBlob(ImageEncodeOptions options); |
78 | |
79 | GraphicsContext* drawingContext() const final { return nullptr; } |
80 | GraphicsContext* existingDrawingContext() const final { return nullptr; } |
81 | |
82 | void makeRenderingResultsAvailable() final { } |
83 | void didDraw(const FloatRect&) final { } |
84 | |
85 | AffineTransform baseTransform() const final { return { }; } |
86 | Image* copiedImage() const final { return nullptr; } |
87 | |
88 | using RefCounted::ref; |
89 | using RefCounted::deref; |
90 | |
91 | private: |
92 | |
93 | OffscreenCanvas(ScriptExecutionContext&, unsigned width, unsigned height); |
94 | |
95 | bool isOffscreenCanvas() const final { return true; } |
96 | |
97 | ScriptExecutionContext* scriptExecutionContext() const final { return ContextDestructionObserver::scriptExecutionContext(); } |
98 | ScriptExecutionContext* canvasBaseScriptExecutionContext() const final { return ContextDestructionObserver::scriptExecutionContext(); } |
99 | |
100 | EventTargetInterface eventTargetInterface() const final { return OffscreenCanvasEventTargetInterfaceType; } |
101 | void refEventTarget() final { ref(); } |
102 | void derefEventTarget() final { deref(); } |
103 | |
104 | void refCanvasBase() final { ref(); } |
105 | void derefCanvasBase() final { deref(); } |
106 | |
107 | IntSize m_size; |
108 | }; |
109 | |
110 | } |
111 | |
112 | SPECIALIZE_TYPE_TRAITS_CANVAS(WebCore::OffscreenCanvas, isOffscreenCanvas()) |
113 | |