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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CSSPaintImageGenerator_h |
| 6 #define CSSPaintImageGenerator_h |
| 7 |
| 8 #include "core/CoreExport.h" |
| 9 #include "platform/geometry/IntSize.h" |
| 10 #include "platform/heap/Handle.h" |
| 11 |
| 12 namespace blink { |
| 13 |
| 14 class Document; |
| 15 class Image; |
| 16 |
| 17 // Produces a PaintGeneratedImage from a CSS Paint API callback. |
| 18 // https://drafts.css-houdini.org/css-paint-api/ |
| 19 class CORE_EXPORT CSSPaintImageGenerator : public GarbageCollectedFinalized<CSSP
aintImageGenerator> { |
| 20 public: |
| 21 // This observer is used if the paint worklet doesn't have a javascript |
| 22 // class registered with the correct name yet. |
| 23 // paintImageGeneratorReady is called when the javascript class is |
| 24 // registered and ready to use. |
| 25 class Observer : public GarbageCollectedFinalized<Observer> { |
| 26 public: |
| 27 virtual ~Observer() { }; |
| 28 virtual void paintImageGeneratorReady() = 0; |
| 29 DEFINE_INLINE_VIRTUAL_TRACE() { } |
| 30 }; |
| 31 |
| 32 static CSSPaintImageGenerator* create(const String& name, Document&, Observe
r*); |
| 33 virtual ~CSSPaintImageGenerator(); |
| 34 |
| 35 typedef CSSPaintImageGenerator* (*CSSPaintImageGeneratorCreateFunction)(cons
t String&, Document&, Observer*); |
| 36 static void init(CSSPaintImageGeneratorCreateFunction); |
| 37 |
| 38 // Invokes the CSS Paint API 'paint' callback. May return a nullptr |
| 39 // representing an invalid image if an error occurred. |
| 40 virtual PassRefPtr<Image> paint(const IntSize&) = 0; |
| 41 |
| 42 DEFINE_INLINE_VIRTUAL_TRACE() { } |
| 43 }; |
| 44 |
| 45 } // namespace blink |
| 46 |
| 47 #endif // CSSPaintImageGenerator_h |
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