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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
// Copyright 2014 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 CC_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_
#define CC_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "cc/base/cc_export.h"
#include "cc/debug/rendering_stats_instrumentation.h"
#include "cc/playback/display_list_recording_source.h"
#include "skia/ext/analysis_canvas.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkPicture.h"
namespace cc {
class DisplayItemList;
class DrawImage;
class CC_EXPORT DisplayListRasterSource
: public base::RefCountedThreadSafe<DisplayListRasterSource> {
public:
struct CC_EXPORT SolidColorAnalysis {
SolidColorAnalysis()
: is_solid_color(false), solid_color(SK_ColorTRANSPARENT) {}
~SolidColorAnalysis() {}
bool is_solid_color;
SkColor solid_color;
};
static scoped_refptr<DisplayListRasterSource>
CreateFromDisplayListRecordingSource(const DisplayListRecordingSource* other,
bool can_use_lcd_text);
// Raster a subrect of this RasterSource into the given canvas. It is
// assumed that contents_scale has already been applied to this canvas.
// Writes the total number of pixels rasterized and the time spent
// rasterizing to the stats if the respective pointer is not nullptr.
// It is assumed that the canvas passed here will only be rasterized by
// this raster source via this call.
// virtual for testing.
virtual void PlaybackToCanvas(SkCanvas* canvas,
const gfx::Rect& canvas_bitmap_rect,
const gfx::Rect& canvas_playback_rect,
float contents_scale) const;
// Similar to above, except that the canvas passed here can (or was already)
// rasterized into by another raster source. That is, it is not safe to clear
// the canvas or discard its underlying memory.
void PlaybackToSharedCanvas(SkCanvas* canvas,
const gfx::Rect& canvas_rect,
float contents_scale) const;
// Analyze to determine if the given rect at given scale is of solid color in
// this raster source.
void PerformSolidColorAnalysis(const gfx::Rect& content_rect,
float contents_scale,
SolidColorAnalysis* analysis) const;
// Returns true iff the whole raster source is of solid color.
bool IsSolidColor() const;
// Returns the color of the raster source if it is solid color. The results
// are unspecified if IsSolidColor returns false.
SkColor GetSolidColor() const;
// Returns the size of this raster source.
gfx::Size GetSize() const;
// Populate the given list with all images that may overlap the given
// rect in layer space. The returned draw images' matrices are modified as if
// they were being using during raster at scale |raster_scale|.
void GetDiscardableImagesInRect(const gfx::Rect& layer_rect,
float raster_scale,
std::vector<DrawImage>* images) const;
// Return true iff this raster source can raster the given rect in layer
// space.
bool CoversRect(const gfx::Rect& layer_rect) const;
// Returns true if this raster source has anything to rasterize.
virtual bool HasRecordings() const;
// Valid rectangle in which everything is recorded and can be rastered from.
virtual gfx::Rect RecordedViewport() const;
// Informs the raster source that it should attempt to use distance field text
// during rasterization.
virtual void SetShouldAttemptToUseDistanceFieldText();
// Return true iff this raster source would benefit from using distance
// field text.
virtual bool ShouldAttemptToUseDistanceFieldText() const;
// Tracing functionality.
virtual void DidBeginTracing();
virtual void AsValueInto(base::trace_event::TracedValue* array) const;
virtual skia::RefPtr<SkPicture> GetFlattenedPicture();
virtual size_t GetPictureMemoryUsage() const;
// Return true if LCD anti-aliasing may be used when rastering text.
virtual bool CanUseLCDText() const;
scoped_refptr<DisplayListRasterSource> CreateCloneWithoutLCDText() const;
protected:
friend class base::RefCountedThreadSafe<DisplayListRasterSource>;
DisplayListRasterSource(const DisplayListRecordingSource* other,
bool can_use_lcd_text);
DisplayListRasterSource(const DisplayListRasterSource* other,
bool can_use_lcd_text);
virtual ~DisplayListRasterSource();
// These members are const as this raster source may be in use on another
// thread and so should not be touched after construction.
const scoped_refptr<DisplayItemList> display_list_;
const size_t painter_reported_memory_usage_;
const SkColor background_color_;
const bool requires_clear_;
const bool can_use_lcd_text_;
const bool is_solid_color_;
const SkColor solid_color_;
const gfx::Rect recorded_viewport_;
const gfx::Size size_;
const bool clear_canvas_with_debug_color_;
const int slow_down_raster_scale_factor_for_debug_;
// TODO(enne/vmiura): this has a read/write race between raster and compositor
// threads with multi-threaded Ganesh. Make this const or remove it.
bool should_attempt_to_use_distance_field_text_;
private:
// Called when analyzing a tile. We can use AnalysisCanvas as
// SkPicture::AbortCallback, which allows us to early out from analysis.
void RasterForAnalysis(skia::AnalysisCanvas* canvas,
const gfx::Rect& canvas_rect,
float contents_scale) const;
void RasterCommon(SkCanvas* canvas,
SkPicture::AbortCallback* callback,
const gfx::Rect& canvas_bitmap_rect,
const gfx::Rect& canvas_playback_rect,
float contents_scale) const;
void PrepareForPlaybackToCanvas(SkCanvas* canvas,
const gfx::Rect& canvas_bitmap_rect,
const gfx::Rect& canvas_playback_rect,
float contents_scale) const;
DISALLOW_COPY_AND_ASSIGN(DisplayListRasterSource);
};
} // namespace cc
#endif // CC_PLAYBACK_DISPLAY_LIST_RASTER_SOURCE_H_
|
