1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// 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.
#ifndef PlaceholderImage_h
#define PlaceholderImage_h
#include "platform/SharedBuffer.h"
#include "platform/geometry/IntSize.h"
#include "platform/graphics/Image.h"
#include "platform/graphics/ImageOrientation.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "wtf/PassRefPtr.h"
class SkCanvas;
class SkPaint;
namespace blink {
class FloatRect;
class ImageObserver;
// A generated placeholder image that shows a translucent gray rectangle.
class PLATFORM_EXPORT PlaceholderImage final : public Image {
public:
static PassRefPtr<PlaceholderImage> create(ImageObserver* observer,
const IntSize& size) {
return adoptRef(new PlaceholderImage(observer, size));
}
~PlaceholderImage() override;
IntSize size() const override { return m_size; }
sk_sp<SkImage> imageForCurrentFrame(const ColorBehavior&) override;
void draw(SkCanvas*,
const SkPaint&,
const FloatRect& destRect,
const FloatRect& srcRect,
RespectImageOrientationEnum,
ImageClampingMode,
const ColorBehavior&) override;
void destroyDecodedData() override;
private:
PlaceholderImage(ImageObserver* observer, const IntSize& size)
: Image(observer), m_size(size) {}
bool currentFrameHasSingleSecurityOrigin() const override { return true; }
bool currentFrameKnownToBeOpaque(MetadataMode = UseCurrentMetadata) override {
// Placeholder images are translucent.
return false;
}
IntSize m_size;
// Lazily initialized.
sk_sp<SkImage> m_imageForCurrentFrame;
};
} // namespace blink
#endif
|
