1 // Copyright 2013 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 ImageBitmap_h 6 #define ImageBitmap_h 7 8 #include "bindings/core/v8/ScriptWrappable.h" 9 #include "core/html/HTMLImageElement.h" 10 #include "core/html/canvas/CanvasImageSource.h" 11 #include "platform/geometry/IntRect.h" 12 #include "platform/graphics/Image.h" 13 #include "platform/heap/Handle.h" 14 #include "wtf/PassRefPtr.h" 15 #include "wtf/RefCounted.h" 16 17 namespace blink { 18 19 class HTMLCanvasElement; 20 class HTMLVideoElement; 21 class ImageData; 22 23 class ImageBitmap FINAL : public RefCountedWillBeGarbageCollectedFinalized<ImageBitmap>, public ScriptWrappable, public ImageLoaderClient, public CanvasImageSource { 24 DEFINE_WRAPPERTYPEINFO(); 25 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ImageBitmap); 26 public: 27 static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLImageElement*, const IntRect&); 28 static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLVideoElement*, const IntRect&); 29 static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLCanvasElement*, const IntRect&); 30 static PassRefPtrWillBeRawPtr<ImageBitmap> create(ImageData*, const IntRect&); 31 static PassRefPtrWillBeRawPtr<ImageBitmap> create(ImageBitmap*, const IntRect&); 32 static PassRefPtrWillBeRawPtr<ImageBitmap> create(Image*, const IntRect&); 33 34 PassRefPtr<Image> bitmapImage() const; 35 PassRefPtrWillBeRawPtr<HTMLImageElement> imageElement() const { return m_imageElement; } 36 37 IntRect bitmapRect() const { return m_bitmapRect; } 38 39 int width() const { return m_cropRect.width(); } 40 int height() const { return m_cropRect.height(); } 41 IntSize size() const { return m_cropRect.size(); } 42 43 virtual ~ImageBitmap(); 44 45 // CanvasImageSource implementation 46 virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageMode, SourceImageStatus*) const OVERRIDE; 47 virtual bool wouldTaintOrigin(SecurityOrigin*) const OVERRIDE { return false; }; 48 virtual void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const OVERRIDE; 49 virtual FloatSize sourceSize() const OVERRIDE; 50 51 virtual void trace(Visitor*); 52 53 private: 54 ImageBitmap(HTMLImageElement*, const IntRect&); 55 ImageBitmap(HTMLVideoElement*, const IntRect&); 56 ImageBitmap(HTMLCanvasElement*, const IntRect&); 57 ImageBitmap(ImageData*, const IntRect&); 58 ImageBitmap(ImageBitmap*, const IntRect&); 59 ImageBitmap(Image*, const IntRect&); 60 61 // ImageLoaderClient 62 virtual void notifyImageSourceChanged() OVERRIDE; 63 virtual bool requestsHighLiveResourceCachePriority() OVERRIDE { return true; } 64 65 // ImageBitmaps constructed from HTMLImageElements hold a reference to the HTMLImageElement until 66 // the image source changes. 67 RefPtrWillBeMember<HTMLImageElement> m_imageElement; 68 RefPtr<Image> m_bitmap; 69 70 IntRect m_bitmapRect; // The rect where the underlying Image should be placed in reference to the ImageBitmap. 71 IntRect m_cropRect; 72 73 // The offset by which the desired Image is stored internally. 74 // ImageBitmaps constructed from HTMLImageElements reference the entire ImageResource and may have a non-zero bitmap offset. 75 // ImageBitmaps not constructed from HTMLImageElements always pre-crop and store the image at (0, 0). 76 IntPoint m_bitmapOffset; 77 78 }; 79 80 } // namespace blink 81 82 #endif // ImageBitmap_h 83
