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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_IMAGEBITMAP_IMAGE_BITMAP_RENDERING_CONTEXT_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_IMAGEBITMAP_IMAGE_BITMAP_RENDERING_CONTEXT_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_typedefs.h"
#include "third_party/blink/renderer/core/html/canvas/canvas_rendering_context.h"
#include "third_party/blink/renderer/core/html/canvas/canvas_rendering_context_factory.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/graphics/skia/skia_utils.h"
#include "ui/gfx/geometry/point_f.h"
namespace cc {
class Layer;
}
namespace blink {
class ExceptionState;
class ImageBitmap;
class ImageLayerBridge;
class V8UnionHTMLCanvasElementOrOffscreenCanvas;
class MODULES_EXPORT ImageBitmapRenderingContext final
: public ScriptWrappable,
public CanvasRenderingContext {
DEFINE_WRAPPERTYPEINFO();
public:
class Factory : public CanvasRenderingContextFactory {
public:
Factory() = default;
Factory(const Factory&) = delete;
Factory& operator=(const Factory&) = delete;
~Factory() override = default;
CanvasRenderingContext* Create(
CanvasRenderingContextHost*,
const CanvasContextCreationAttributesCore&) override;
CanvasRenderingContext::CanvasRenderingAPI GetRenderingAPI()
const override {
return CanvasRenderingContext::CanvasRenderingAPI::kBitmaprenderer;
}
};
ImageBitmapRenderingContext(CanvasRenderingContextHost*,
const CanvasContextCreationAttributesCore&);
void Trace(Visitor*) const override;
V8UnionHTMLCanvasElementOrOffscreenCanvas* getHTMLOrOffscreenCanvas() const;
void PageVisibilityChanged() override {}
bool isContextLost() const override { return false; }
// If SetImage receives a null imagebitmap, it will Reset the internal bitmap
// to a black and transparent bitmap.
void SetImage(ImageBitmap*);
scoped_refptr<StaticBitmapImage> GetImage(FlushReason) final;
void SetUV(const gfx::PointF& left_top, const gfx::PointF& right_bottom);
SkAlphaType GetAlphaType() const override { return kPremul_SkAlphaType; }
viz::SharedImageFormat GetSharedImageFormat() const override {
return GetN32FormatForCanvas();
}
gfx::ColorSpace GetColorSpace() const override {
return gfx::ColorSpace::CreateSRGB();
}
bool IsComposited() const final { return true; }
bool PushFrame() override;
cc::Layer* CcLayer() const final;
// TODO(junov): handle lost contexts when content is GPU-backed
void LoseContext(LostContextMode) override {}
void Reset() override;
void Stop() override;
scoped_refptr<StaticBitmapImage> PaintRenderingResultsToSnapshot(
SourceDrawingBuffer source_buffer,
FlushReason reason) override;
bool IsPaintable() const final;
// Script API
void transferFromImageBitmap(ImageBitmap*, ExceptionState&);
// CanvasRenderingContext implementation
ImageBitmap* TransferToImageBitmap(ScriptState*, ExceptionState&) override;
V8RenderingContext* AsV8RenderingContext() final;
V8OffscreenRenderingContext* AsV8OffscreenRenderingContext() final;
~ImageBitmapRenderingContext() override;
private:
void Dispose() override;
// This function resets the internal image resource to a image of the same
// size than the original, with the same properties, but completely black.
// This is used to follow the standard regarding transferToBitmap
scoped_refptr<StaticBitmapImage> GetImageAndResetInternal();
CanvasResourceProvider* GetOrCreateResourceProviderForOffscreenCanvas();
void ResetInternalBitmapToBlackTransparent(int width, int height);
Member<ImageLayerBridge> image_layer_bridge_;
std::unique_ptr<CanvasResourceProvider>
resource_provider_for_offscreen_canvas_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_IMAGEBITMAP_IMAGE_BITMAP_RENDERING_CONTEXT_H_
|
