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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
* Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_CANVAS2D_CANVAS_STYLE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_CANVAS2D_CANVAS_STYLE_H_
#include "base/check.h"
#include "base/check_op.h"
#include "base/compiler_specific.h"
#include "cc/paint/paint_flags.h"
#include "third_party/blink/public/mojom/frame/color_scheme.mojom-blink.h"
#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/blink/renderer/platform/heap/forward.h" // IWYU pragma: keep (blink::Visitor)
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
// https://github.com/include-what-you-use/include-what-you-use/issues/1546
// IWYU pragma: no_forward_declare WTF::internal::__thisIsHereToForceASemicolonAfterThisMacro
// IWYU pragma: no_include "third_party/blink/renderer/platform/heap/visitor.h"
namespace ui {
class ColorProvider;
} // namespace ui
namespace blink {
class CanvasGradient;
class CanvasPattern;
class CanvasStyle final {
DISALLOW_NEW();
public:
CanvasStyle() : type_(kColor), color_(Color::kBlack) {}
CanvasStyle(const CanvasStyle& other) = default;
String GetColorAsString() const {
DCHECK_EQ(type_, kColor);
return color_.SerializeAsCanvasColor();
}
CanvasGradient* GetCanvasGradient() const { return gradient_.Get(); }
CanvasPattern* GetCanvasPattern() const { return pattern_.Get(); }
// Applies the CanvasStyle to PaintFlags. This is the slow path to be used
// in cases where PaintFlags has never been initialized and no assumptions
// can be made about the CanvasStyle's type
void ApplyToFlags(cc::PaintFlags&, float global_alpha) const;
// Like ApplyFlags, but does nothing if type is Color. This method is called
// at draw time to synchronize the states of live CanvasPattern and
// CanvasGradientObjects.
void SyncFlags(cc::PaintFlags&, float global_alpha) const;
// FastPath: Call this instead of ApplyToFlags when the CanvasStyle is known
// to be of type kColor.
void ApplyColorToFlags(cc::PaintFlags&, float global_alpha) const;
bool IsEquivalentColor(Color color) const {
return type_ == kColor && color_ == color;
}
bool SetColor(Color color) {
if (type_ == kColor) [[likely]] {
if (color == color_) {
return false;
}
color_ = color;
return true;
}
type_ = kColor;
color_ = color;
gradient_ = nullptr;
pattern_ = nullptr;
return true;
}
void SetPattern(CanvasPattern* pattern) {
type_ = kImagePattern;
pattern_ = pattern;
gradient_ = nullptr;
}
void SetGradient(CanvasGradient* gradient) {
type_ = kGradient;
gradient_ = gradient;
pattern_ = nullptr;
}
void Trace(Visitor*) const;
private:
enum Type { kColor, kGradient, kImagePattern };
Type type_;
Color color_;
Member<CanvasGradient> gradient_;
Member<CanvasPattern> pattern_;
};
ALWAYS_INLINE void CanvasStyle::ApplyColorToFlags(cc::PaintFlags& flags,
float global_alpha) const {
// Inlined fast path for color values: because color values are immutable
// they can be applied once at style set time.
DCHECK(type_ == kColor);
flags.setShader(nullptr);
Color color = color_;
color.SetAlpha(color.Alpha() * global_alpha);
flags.setColor(color.toSkColor4f());
}
ALWAYS_INLINE void CanvasStyle::SyncFlags(cc::PaintFlags& flags,
float global_alpha) const {
if (type_ == kColor) [[likely]] {
// Color values are immutable so they never need to be sync'ed at draw time.
return;
}
ApplyToFlags(flags, global_alpha);
}
enum class ColorParseResult {
// The string identified a valid color.
kColor,
// The string identified the current color.
kCurrentColor,
// The string contains a color-mix or relative color function, which may
// contain currentcolor.
kColorFunction,
// Parsing failed.
kParseFailed
};
// Parses the canvas color string and returns the result. If the result is
// `kParsedColor`, `parsed_color` is set appropriately.
ColorParseResult ParseCanvasColorString(const String& color_string,
mojom::blink::ColorScheme color_scheme,
Color& parsed_color,
const ui::ColorProvider* color_provider,
bool is_in_web_app_scope);
// Parses the canvas color string, returning true on success. If `color_string`
// indicates the current color should be used, `parsed_color` is set to black.
// Use this function in places not associated with an HTMLCanvasElement.
bool ParseCanvasColorString(const String& color_string, Color& parsed_color);
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_CANVAS2D_CANVAS_STYLE_H_
|
