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
|
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_DELEGATED_INK_METADATA_H_
#define UI_GFX_DELEGATED_INK_METADATA_H_
#include <string>
#include "base/component_export.h"
#include "base/time/time.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/rect_f.h"
namespace gfx {
// Maximum number of points that can be drawn. This is used to limit the total
// number of ink trail tokens that we will store, and the total number of points
// that we will store to provide to the Direct Composition APIs. It should match
// the exact number of points that the OS Compositor will store to draw as part
// of a trail.
inline constexpr int kMaximumNumberOfDelegatedInkPoints = 128;
// This class stores all the metadata that is gathered when the WebAPI
// updateInkTrailStartPoint is called. This metadata flows from blink,
// through cc, and into viz in order to produce a delegated ink trail on the
// end of what was already rendered.
//
// Explainer for the feature:
// https://github.com/WICG/ink-enhancement/blob/main/README.md
class COMPONENT_EXPORT(GFX) DelegatedInkMetadata {
public:
DelegatedInkMetadata() = default;
bool operator==(const DelegatedInkMetadata& o) const = default;
DelegatedInkMetadata(const PointF& pt,
double diameter,
SkColor color,
base::TimeTicks timestamp,
const RectF& area,
bool hovering)
: point_(pt),
diameter_(diameter),
color_(color),
timestamp_(timestamp),
presentation_area_(area),
is_hovering_(hovering) {}
DelegatedInkMetadata(const PointF& pt,
double diameter,
SkColor color,
base::TimeTicks timestamp,
const RectF& area,
base::TimeTicks frame_time,
bool hovering,
std::uint64_t render_pass_id)
: point_(pt),
diameter_(diameter),
color_(color),
timestamp_(timestamp),
presentation_area_(area),
frame_time_(frame_time),
is_hovering_(hovering),
render_pass_id_(render_pass_id) {}
DelegatedInkMetadata(const DelegatedInkMetadata& other) = default;
DelegatedInkMetadata& operator=(const DelegatedInkMetadata& other) = default;
const PointF& point() const { return point_; }
double diameter() const { return diameter_; }
SkColor color() const { return color_; }
base::TimeTicks timestamp() const { return timestamp_; }
const RectF& presentation_area() const { return presentation_area_; }
base::TimeTicks frame_time() const { return frame_time_; }
std::uint64_t render_pass_id() const { return render_pass_id_; }
bool is_hovering() const { return is_hovering_; }
void set_render_pass_id(std::uint64_t render_pass_id) {
render_pass_id_ = render_pass_id;
}
void set_frame_time(base::TimeTicks frame_time) { frame_time_ = frame_time; }
uint64_t trace_id() const {
// Use mask to distinguish from DelegatedInkPoint::trace_id().
// Using microseconds provides uniqueness of trace_id per
// DelegatedInkMetadata.
return static_cast<uint64_t>(timestamp_.since_origin().InMicroseconds()) |
(uint64_t{1} << 63);
}
std::string ToString() const;
private:
// Location of the pointerevent relative to the root frame.
PointF point_;
// Width of the trail, in physical pixels.
double diameter_ = 0;
// Color to draw the ink trail.
SkColor color_ = 0;
// Timestamp from the pointerevent for the ink point.
base::TimeTicks timestamp_;
// The rect to clip the ink trail to, defaults to the containing viewport.
RectF presentation_area_;
// Frame time of the layer tree that this metadata is on.
base::TimeTicks frame_time_;
// True if the left mouse button is up or if a stylus with hovering
// capabilities is hovering over the screen when updateInkTrailStartPoint is
// called.
bool is_hovering_ = false;
// Id of the render pass that will have the delegated ink drawn on top of.
// This is used when delegated ink is rendered by Skia. Only used within the
// gpu process - not serialized over mojo.
std::uint64_t render_pass_id_ = 0;
};
} // namespace gfx
#endif // UI_GFX_DELEGATED_INK_METADATA_H_
|
